CN114131110B - Broaching fixture for shaft tile and broaching machine special for bearing bush piece - Google Patents

Abstract

The invention relates to a bearing bush piece broaching clamp and a special broaching machine for bearing bush pieces. The bearing bush piece broaching fixture comprises an underframe with a chute, a fixed block with a clamping groove, a movable block, a connecting rod and a linkage assembly and a clamping driving piece. The side wall of the chute is provided with a rotation point. The connecting rod is movably arranged in the chute along the longitudinal direction of the connecting rod. One end of the connecting rod is rotationally connected with the movable block, and the other end of the connecting rod is movably connected with the linkage assembly. The clamping driving piece is in transmission connection with the linkage assembly and is used for providing a driving force for driving the linkage assembly to move along the direction towards or away from the fixed block. When the movable block is positioned in the clamping groove, a clamping part for clamping the shaft tile is formed between the movable block and the inner wall of the clamping groove. In the moving process of the linkage assembly, the linkage assembly can operatively drive the connecting rod to rotate around the rotating shaft at the rotating point, so as to adjust the size of the clamping part. The bearing bush piece broaching clamp can improve the machining precision of the bearing bush piece and the product yield of the shaft tile.

Description

Broaching fixture for shaft tile and broaching machine special for bearing bush piece

Technical Field

The invention relates to the technical field of bearing bush piece manufacturing, in particular to a bearing bush piece broaching clamp and a special broaching machine for bearing bush pieces.

Background

The shaft tile is the contact part of the sliding bearing and the shaft diameter, is in a tile-shaped semi-cylindrical surface, is very smooth and has very high processing requirements. Currently, the shaft tiles are usually machined by grinding. However, the shaft tiles are very thin, so that deformation, breakage and the like are easy to occur in the processing process, and the product yield is low.

Disclosure of Invention

Based on the above, it is necessary to provide a bearing bush piece broaching clamp and a special broaching machine for bearing bush pieces, which can solve the problem of low yield caused by deformation and damage of the bearing bush pieces in the conventional machining process of the bearing bush pieces.

The bearing bush piece broaching clamp comprises a bottom frame with a sliding groove, a fixed block with a clamping groove, a movable block, a connecting rod, a linkage assembly and a clamping driving piece, wherein the linkage assembly and the clamping driving piece are slidably arranged on the bottom frame; the side wall of the chute is provided with a rotation point;

the fixed block is fixedly arranged on the underframe; the extending direction of the clamping groove is consistent with the extending direction of the sliding groove;

the connecting rod is movably arranged in the chute along the lengthwise direction of the connecting rod; one end of the connecting rod is rotationally connected with the movable block, and the other end of the connecting rod is movably connected with the linkage assembly;

the clamping driving piece is in transmission connection with the linkage assembly and is used for providing a driving force for driving the linkage assembly to move along the direction towards or away from the fixed block;

when the movable block is positioned in the clamping groove, a clamping part for clamping the shaft tile is formed between the movable block and the inner wall of the clamping groove;

in the moving process of the linkage assembly, the linkage assembly can operatively drive the connecting rod to rotate around the rotating shaft of the rotating point position so as to adjust the size of the clamping part; the linkage assembly comprises a sliding part with a connecting cavity, a guide column and a telescopic structure;

the side wall of the sliding part is provided with a strip-shaped guide groove communicated with the connecting cavity; the height of the guide groove, which is close to one end of the fixed block, is smaller than the height of the guide groove, which is far away from one end of the fixed block;

one end of the connecting rod, which is far away from the movable block, is penetrated in the connecting cavity; the guide post is fixedly arranged at one end of the connecting rod, which is far away from the movable block, and slidably penetrates through the guide groove;

the telescopic structure is arranged at the end part of the connecting rod, which is far away from one end of the movable block, and is propped against the inner wall of the connecting cavity; the telescopic structure is telescopic relative to the connecting rod;

the clamping driving piece is in transmission connection with the sliding piece and is used for providing a driving force for driving the sliding piece to move along the direction towards or away from the fixed block; when the sliding piece moves to a preset position, the guide post slides along the guide groove so as to drive the connecting rod to rotate around the rotating shaft of the rotating point along the direction facing or deviating from the clamping groove.

In some of these embodiments, the chassis includes a base plate, a first support, and a second support; the first supporting piece and the second supporting piece are arranged on the bottom plate at intervals; the first supporting piece is provided with the sliding groove; the fixed block is arranged on the bottom plate and is positioned at one side of the first supporting piece, which is away from the second supporting piece; the linkage assembly is slidably mounted on the second support.

In some embodiments, the top surface of the first support member is provided with the chute; a limit baffle is detachably arranged at the opening of the chute; the connecting rod is located below the limit baffle.

In some embodiments, an end face of the connecting rod, which is away from one end of the movable block, is provided with a telescopic hole; the telescopic structure comprises a telescopic rod and an elastic piece; the telescopic rod can movably penetrate through the telescopic hole; the elastic piece is arranged in the telescopic hole and is used for providing an elastic force for the telescopic rod, which is opposite to the fixed block; or (b)

A limiting block is arranged on the side wall of the connecting rod; when the sliding piece moves to a preset position, the limiting block is propped against the edge of the opening at one end, deviating from the fixed block, of the sliding groove; or (b)

The linkage assembly further comprises an elastic reset piece; the elastic reset piece is used for providing an elastic force for the guide post to drive the guide post to move in the guide groove along the downward inclined direction.

In some embodiments, a traction part is arranged at one end of the connecting rod away from the movable block; the traction part is positioned in the connecting cavity; when the sliding piece drives the connecting rod to move along the direction deviating from the fixed block, the traction part is hooked on the side wall of the connecting cavity, which is close to one side of the fixed block.

In some embodiments, the bottom surface of the connecting chamber is parallel to the length direction of the guide groove; the traction part is contacted with the bottom surface of the connecting chamber and can slide along the inclined direction of the bottom surface of the connecting chamber.

In some embodiments, a limit groove is formed at one end of the connecting rod away from the linkage assembly; the limiting groove extends along the longitudinal direction of the connecting rod; the top surface of the movable block is provided with a clearance groove; the bottom surface of the avoidance groove is provided with a mounting plate matched with the limit groove; the mounting plate is rotatably mounted in the limit groove; or (b)

A limiting piece is arranged at the edge part of the limiting groove facing one side of the sliding groove; the limiting piece is used for propping against one end, facing the sliding groove, of the inner shaft tile of the clamping part.

In some of these embodiments, a flattening mechanism is also included; the flattening mechanism comprises a flattening piece and a pressing driving piece; the flattening piece is arranged on the lathe bed of the broaching machine special for the axle tile and is positioned at the upstream end of the broaching tool; the lower pressing driving member is in driving connection with the flattening member for providing a driving force for driving the flattening member downward to flatten the two bisecting surfaces of the bearing pads when the chassis passes under the flattening member.

A special broaching machine for bearing bush pieces comprises a machine body, a main slide carriage arranged on the machine body, a bearing bush piece broaching clamp, a driving mechanism and a broach, wherein the bearing bush piece broaching clamp is used for broaching bearing bush pieces;

the lathe bed is provided with a feeding station, a broaching station and a discharging station which are arranged at intervals; the underframe is arranged on the main slide carriage;

the driving mechanism is in transmission connection with the main slide carriage and is used for providing a driving force for driving the main slide carriage to move along the linear direction; the main slide carriage sequentially passes through the feeding station, the broaching station and the discharging station in the moving process;

the broach is arranged at the broaching station and is used for carrying out broaching on two bisecting surfaces of the inner shaft tile of the clamping part when the main slide carriage passes through the broaching station.

The bearing bush piece broaching clamp and the special broaching machine for the bearing bush piece are applied to the special broaching machine for the axle tile to assist in completing the broaching processing of two bisecting surfaces of the axle tile. Because the clamping driving piece can continuously provide driving force for the linkage assembly, after the shaft tile is clamped in the clamping part, the movable block continuously applies clamping force to the bearing bush piece under the action of the driving force so as to improve the clamping effect of the shaft tile in the clamping part. In the broaching process of the two bisectors of the shaft tile, even if the broaching force applied to the bisectors of the bearing bush piece by the broach is very large, the shaft tile is not easy to slide, shake and other loose conditions in the clamping part, so that the stability of the bearing bush piece in the broaching process is improved, the probability of deformation, damage and other conditions of the shaft tile in the broaching process is greatly reduced, and the bearing bush piece broaching clamp is arranged, so that the machining precision of the bearing bush piece is ensured, and the higher product yield is also considered.

Drawings

FIG. 1 is a schematic diagram of a broaching machine dedicated to center axis tiles in accordance with one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the center shaft tile of the present invention;

FIG. 3 is a schematic view of the structure of the axial tile broaching fixture of the special broaching machine for axial tiles shown in FIG. 1;

FIG. 4 is a schematic view of the configuration of the chassis in the shaft tile broaching fixture of FIG. 3;

FIG. 5 is a schematic view of the structure of the fixing block in the shaft tile broaching fixture of FIG. 3;

FIG. 6 is a cross-sectional view of the shaft tile broaching fixture of FIG. 3;

FIG. 7 is an enlarged view of a portion of the shaft tile broaching fixture of FIG. 6;

FIG. 8 is a schematic view of the structure of the connecting rod in the shaft tile broaching fixture of FIG. 3;

FIG. 9 is a schematic view of the movable block of the shaft tile broaching fixture of FIG. 3.

Description of the reference numerals: 10. broaching machine special for shaft tiles; 100. a bed body; 110. a feeding station; 120. a broaching station; 130. a blanking station; 200. a main slide carriage; 300. shaft tile broaching fixture; 310. a chassis; 311. a chute; 312. a bottom plate; 313. a first support; 314. a second support; 3141. a guide groove; 315. a limit baffle; 316. rotating the round shaft; 320. a fixed block; 321. a clamping groove; 322. a clamping part; 323. a limit part; 3231. a clearance groove; 330. a movable block; 331. a clearance groove; 332. a mounting plate; 340. a connecting rod; 341. a telescopic hole; 342. a guide groove; 343. a traction section; 344. a limit groove; 350. a linkage assembly; 351. a slider; 3511. a connecting chamber; 3512. a guide groove; 352. a guide post; 353. a telescopic structure; 3531. a telescopic rod; 3532. an elastic member; 354. an elastic reset piece; 360. clamping the driving piece; 370. a clamping part; 381. a limiting block; 382. a limiting piece; 390. a flattening mechanism; 391. flattening the piece; 392. pressing down the driving piece; 400. a driving mechanism; 500. broaching tool; 20. a shaft tile; 21. and (5) dividing the surface in the middle.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another component may also be added unless explicitly defined as such, e.g., "consisting of … …," etc. Unless mentioned to the contrary, singular terms may include plural and are not to be construed as being one in number.

Further, the drawings are not 1:1, and the relative dimensions of the various elements are drawn by way of example only in the drawings and are not necessarily drawn to true scale.

The invention provides a bearing bush piece broaching clamp and a special broaching machine for bearing bush pieces. The bearing bush piece broaching fixture is applied to a broaching machine special for the axle tiles so as to assist in completing broaching of two bisecting surfaces of the axle tiles. In the embodiments of the present invention, the application of the bearing bush piece broaching jig to the horizontal broaching machine will be described as an example. Of course, in other embodiments, the bearing pad broaching jig described above may also be used on a vertical broaching machine.

FIG. 1 shows a structure of a broaching machine dedicated to center axis tiles according to an embodiment of the present invention. Fig. 2 is a structure of a shaft tile. For convenience of explanation, the drawings show only portions relevant to the embodiments of the present invention.

Referring to fig. 1 and 2, the bearing shell segment-specific broaching machine 10 includes a machine body 100, a main carriage 200, a bearing shell segment broaching jig 300, a driving mechanism 400, and a broach 500.

The lathe bed 100 has a loading station 110, a broaching station 120, and a blanking station 130 arranged at intervals. The loading station 110, the broaching station 120 and the unloading station 130 are the location areas on the lathe bed 100 for loading, broaching and unloading, respectively.

The main carriage 200 is mounted on the bed 100. Specifically, the main carriage 200 is slidably mounted on the bed 100. The shaft tile broaching fixture 300 is mounted to the main carriage 200. Referring also to fig. 2, a bushing plate broaching fixture 300 is used to clamp a bushing plate 20 to be machined to a main slide 200 to facilitate broaching a split surface 21 of a shaft tile 20.

The driving mechanism 400 is in transmission connection with the main slide 200, and is used for providing a driving force for driving the main slide 200 to move along a linear direction. The main carriage 200 sequentially passes through the feeding station 110, the broaching station 120 and the discharging station 130 in the moving process. Thus, the feeding station 110, the broaching station 120 and the discharging station 130 are arranged at intervals along the linear direction, so that the broaching direction of the bearing bush piece dedicated broaching machine 10 is the linear direction in which the feeding station 110 points to the discharging station 130.

Broach 500 is mounted to broaching station 120 for broaching two bisecting surfaces 21 of bearing pads 20 on shaft tile broaching fixture 300 as main carriage 200 passes through broaching station 120.

FIG. 3 illustrates the structure of a shaft tile broaching fixture in accordance with one embodiment of the present invention. For convenience of explanation, the drawings show only structures related to the embodiments of the present invention.

Referring to fig. 3, the bearing pad broaching fixture 300 according to the preferred embodiment of the present invention includes a base 210, a fixed block 320, a movable block 330, a connecting rod 340, a linkage assembly 350 and a clamping driver 360.

The chassis 210 has a chute 311. Specifically, the chute 311 is located at the top of the chassis 210. In the bush-piece specific broaching machine 10, the undercarriage 210 is mounted on the main carriage 200 to achieve the mounting of the bush-piece broaching jig 300 on the main carriage 200. Specifically, the extending direction of the slide groove 311 is identical to the broaching direction of the bearing bush piece-dedicated broaching machine 10.

Referring to fig. 4, specifically, the chassis 210 includes a bottom plate 312, a first support 313 and a second support 314. The first supporting member 313 and the second supporting member 314 are disposed on the bottom plate 312 at intervals. The first support 313 is provided with a chute 311. When the bushing plate broaching fixture 300 is required to be mounted on the main slide 200, the bottom plate 312 is simply connected to the main slide 200. In the part processing, the structural characteristics of the chassis 210 are not suitable for the whole processing, and the chassis 210 is configured as the bottom plate 312, the first supporting member 313 and the second supporting member 314, so that the processing difficulty can be reduced, the processing precision can be improved, the material waste is less, and the processing cost is lower.

The side wall of the chute 311 has a rotation point (not shown). Specifically, the rotation axis of the rotation point is perpendicular to the extending direction of the chute 311. The rotation point may be a virtual installation point, an installation hole capable of installing a rotation shaft, a shaft structure rotatably installed on the chassis 210, or the like. The rotation points can be one or two. When the rotation points are two, the two rotation points are opposite and aligned.

Referring to fig. 5, the fixing block 320 is fixed on the chassis 210. The fixing block 320 has a clamping groove 321. Specifically, the top end of the fixing block 320 is provided with a clamping groove 321. The extending direction of the clamping groove 321 is identical to the extending direction of the sliding groove 311. When the chassis 210 includes the bottom plate 312, the first support 313 and the second support 314, the fixing block 320 is mounted on the bottom plate 312 and located at a side of the first support 313 facing away from the second support 314.

Specifically, the fixing block 320 includes a clamping portion 322 and a limiting portion 323 connected to one end of the clamping portion 322. The top surface of the clamping portion 322 is provided with a clamping groove 321. The top surface of the clamping portion 322 is provided with a clearance groove 3231 communicated with the clamping groove 321. The projection of the clamping groove 321 on the side of the first support 313 is located within the projection of the clearance groove 3231 on the side of the first support 313. One side of the limiting portion 323, which is away from the clamping portion 322, abuts against a surface of one side of the first support 313, which is away from the second support 314. Thereby, the fixing block 320 abuts against the first support 313, and structural stability of the bearing pad broaching fixture 300 may be improved. The arrangement of the clearance groove 3231 can avoid interference during the movement of the movable block 330 into the clamping groove 321 or out of the clamping groove 321, thereby improving the reliability of the movable block 330 during the movement.

Referring to fig. 3 and 5 again, more specifically, a limiting member 382 is disposed at an edge portion of the clamping groove 321 facing the side of the sliding groove 311. The limiting member 382 is used for abutting against one end of the inner shaft tile 20 facing the sliding groove 311 in the clamping portion 370. Specifically, when the fixing block 320 includes the clamping portion 322 and the limiting portion 323, the limiting member 382 is disposed on the limiting portion 323 and located at an edge of the clamping groove 321. In the broaching process of the two split surfaces 21 of the bearing bush piece 20, the limiting piece 382 is propped against one end, facing the sliding groove 311, of the inner shaft tile 20 in the clamping part 370, so that the probability of horizontal movement of the shaft tile 20 under the action of broaching force is reduced, the stability of the bearing bush piece 20 in the broaching process is improved, and the machining precision of the shaft tile 20 and the yield of products are further improved.

The link 340 is movably installed in the chute 311 in a longitudinal direction thereof. One end of the connecting rod 340 is rotatably connected with the movable block 330, and the other end is movably connected with the linkage assembly 350. Thus, the movable block 330 and the linkage assembly 350 are respectively positioned at two ends of the chute 311.

The linkage assembly 350 is slidably mounted to the chassis 210. The clamping driver 360 is in driving connection with the linkage assembly 350 for providing a driving force for driving the linkage assembly 350 to move in a direction toward or away from the fixed block 320. Specifically, the clamping driver 360 drives the linkage assembly 350 to move in a linear direction. Specifically, the linkage assembly 350 is a linkage mechanism composed of a plurality of parts, the connecting rod 340 is rotationally connected with one part of the linkage assembly 350, and the clamping driving member 360 is in transmission connection with the other part of the linkage assembly 350. Specifically, the linkage assembly 350 may be a link 340 mechanism or a cam mechanism, etc.

Referring again to fig. 3 and 4, in particular, the linkage assembly 350 is slidably mounted on the second support 314. More specifically, a guide groove 3141 is formed at the top of the second support 314, and an extending direction of the guide groove 3141 is consistent with an extending direction of the sliding groove 311, and the linkage assembly 350 is slidably installed in the guide groove 3141, so as to guide a sliding track of the linkage assembly 350, thereby improving the running accuracy of the bearing pad broaching fixture 300. The guide groove 3141 may be a groove formed on the top surface of the second support 314, or may be a groove formed by two parallel guide rods arranged at intervals.

When the movable block 330 is positioned in the clamping groove 321, a clamping portion 370 for clamping the shaft tile 20 is formed between the movable block 330 and the inner wall of the clamping groove 321. During the movement of the linkage assembly 350, the linkage assembly 350 is operable to drive the link 340 to rotate about the rotation axis of the rotation point, so as to adjust the size of the clamping portion 370. Specifically, during the movement of the linkage assembly 350, the relative movement between the parts in the linkage assembly 350 will occur, so as to drive the link 340 to rotate around the rotation point.

Specifically, during the movement of the linkage assembly 350 in the direction toward the fixed block 320, the linkage assembly 350 is operable to drive the link 340 to rotate around the rotation axis of the rotation point in the direction toward the clamping groove 321, so as to reduce the clamping portion 370; during the movement of the linkage assembly 350 away from the fixed block 320, the linkage assembly 350 is operable to drive the link 340 to move around the rotation axis of the rotation point in a direction away from the clamping groove 321, so as to enlarge the clamping portion 370.

When the bearing bush piece 20 to be processed is required to be clamped on the bearing bush piece broaching fixture 300, firstly, the bearing bush piece 20 to be processed is placed in the clamping groove 321, and the two bisecting surfaces 21 of the shaft tile 20 are ensured to face upwards; then, the clamping driving piece 360 is utilized to drive the linkage assembly 350 to move along the direction towards the fixed block 320 so as to drive the movable block 330 into the clamping groove 321; the clamping driving piece 360 continuously provides driving force for the linkage assembly 350 towards the fixed block 320, so that the linkage assembly 350 drives the connecting rod 340 to rotate around the rotation point along the direction towards the clamping groove 321, and the movable block 330 is utilized to clamp the bearing bush piece 20 to be processed in the clamping part 370;

when the machined bearing bush piece 20 needs to be removed from the shaft tile broaching fixture 300, the clamping driving piece 360 is utilized to drive the linkage assembly 350 to move in the direction away from the fixed block 320, so that the linkage assembly 350 drives the connecting rod 340 to rotate around the rotation point in the direction away from the clamping groove 321, and the bearing bush piece 20 in the clamping part 370 is loosened; the clamping driver 360 then continues to provide a driving force to the linkage assembly 350 away from the fixed block 320 to drive the linkage assembly 350 to move the movable block 330 out of the clamping slot 321, facilitating removal of the machined bushing plate 20 from the shaft tile broaching fixture 300. Therefore, the bearing bush piece broaching clamp 300 can realize automatic clamping of the shaft tiles 20, and is beneficial to improving the processing efficiency of the shaft tiles 20.

The clamping driver 360 continuously provides the driving force of the fixed block 320 to the linkage assembly 350 when the bushing 20 is clamped in the clamping portion 370, so that the movable block 330 continuously applies pressure to the bushing 20 in the clamping portion 370 under the driving force to enhance the clamping effect of the shaft tile 20 in the clamping portion 370. Therefore, in the process of carrying out broaching processing on the two middle division surfaces 21 of the shaft tile 20 by utilizing the broaching machine 10 special for the bearing bush piece, even if the broaching force applied by the broaching tool 500 on the middle division surfaces 21 of the bearing bush piece 20 is very large, the bearing bush piece 20 is not easy to loose in the clamping part 370, so that the stability of the bearing bush piece 20 in the broaching processing is extremely high, the probability of deformation, damage and the like of the shaft tile 20 in the broaching processing is greatly reduced, and the bearing bush piece broaching fixture 300 ensures the processing precision of the shaft tile 20 and also has higher product yield.

In some embodiments, the top surface of the first support 313 is provided with a chute 311. A limit baffle 315 is detachably arranged at the opening of the chute 311. The link 340 is located below the limit stop 315. Thus, the chute 311 is a groove with an opening on the top surface of the first support 313, and the limit baffle 315 is mounted on the top surface of the first support 313. A sliding groove 311 is formed on the top surface of the first support 313, and a limit baffle 315 is detachably installed at an opening of the sliding groove 311, so as to facilitate the installation of the connecting rod 340 in the sliding groove 311. And the setting of limit baffle 315 can avoid connecting rod 340 to slide in spout 311 and take place in the circumstances that deviate from in spout 311 when rotating, has improved the reliability of axle bush piece broaching anchor clamps 300 in the use.

Specifically, an installation groove (not shown) that is communicated with the chute 311 is formed at the opening edge of the chute 311, and the limit baffle 315 is installed in the installation groove. More specifically, the upper surface of the limit stop 315 is flush with the top surface of the first support 313. Therefore, the arrangement of the mounting groove can reduce the probability that the limit baffle 315 interferes with other parts of the bearing bush piece special broaching machine 10 when the main slide 200 drives the bearing bush piece broaching clamp 300 to move on the lathe bed 100.

Further, in some embodiments, a side surface of the limit stop 315 facing the link 340 is arcuate. Specifically, the arc surface is a cylindrical surface. The extending direction of the arc surface is perpendicular to the extending direction of the chute 311. When the connecting rod 340 rotates around the rotation point, the connecting rod 340 is most likely to contact with the limit baffle 315, and the surface of the limit baffle 315 facing one side of the connecting rod 340 is set to be an arc surface, so that the rotation angle of the connecting rod 340 during rotation can be increased, the convenience in use of the bearing bush piece broaching fixture 300 is facilitated, and the clamping effect on the inner shaft tile 20 in the clamping portion 370 can be further ensured.

Referring also to fig. 6, in some embodiments, the linkage assembly 350 includes a slider 351 having a connection chamber 3511, a guide post 352, and a telescoping structure 353. The side wall of the sliding member 351 is provided with a guide groove 3512 having a long bar shape communicating with the connection chamber 3511. The height of the guide groove 3512 near the end of the fixed block 320 is smaller than the height of the guide groove 3512 far from the end of the fixed block 320. Thus, in the direction in which the fixing block 320 is directed toward the slide groove 311, the length direction of the guide groove 3512 is disposed obliquely upward with respect to the extending direction of the clamping groove 321.

One end of the connecting rod 340, which is far away from the movable block 330, is penetrated in the connecting chamber 3511. The guide post 352 is fixedly arranged at one end of the connecting rod 340 far away from the movable block 330 and slidably penetrates into the guide groove 3512. The guide post 352 may be a protrusion protruding from one side of the link 340, or protruding from two opposite sides of the link 340. When the guide post 352 is a protruding post structure protruding from two opposite sides of the connecting rod 340, the guide post 352 may be a post structure penetrating one end of the connecting rod 340 away from the movable block 330, or may be two post structures fixed on two opposite sides of the connecting rod 340. If the guide post 352 is a protruding post structure protruding from two sides of the connecting rod 340, the rotation points are two, and the two rotation points are opposite and aligned.

The telescopic structure 353 is mounted at an end of the connecting rod 340 far from the movable block 330, and abuts against the inner wall of the connecting chamber 3511. The telescoping structure 353 is telescoping with respect to the link 340. The telescopic structure 353 may be a single telescopic structure 353, or may be a telescopic structure 353 formed by mutually matching multiple parts, for example, the telescopic structure 353 includes a straight rod and a spring for providing an elastic force to the straight rod.

The clamping driver 360 is in driving connection with the slider 351 for providing a driving force for driving the slider 351 to move in a direction toward or away from the fixed block 320. When the sliding member 351 moves to the preset position, the guide post 352 slides in the guide groove 3512, so as to drive the connecting rod 340 to rotate around the rotating shaft at the rotating point in a direction towards or away from the clamping groove 321. The preset position refers to a position of the sliding member 351 on the chassis 210 when the movable block 330 is located in the clamping groove 321, and is located between an initial position where the sliding member 351 is farthest from the fixed block 320 and a final position where the sliding member 351 is closest to the fixed block 320.

When the bearing bush piece 20 needs to be clamped in the clamping part 370, the clamping driving member 360 provides a driving force directed to the fixed block 320 for the sliding member 351, and at this time, the sliding member 351 pushes the connecting rod 340 and the movable block 330 to make a linear motion along the direction towards the fixed block 320 through the telescopic structure 353; when the sliding member 351 moves to the preset position, the movable block 330 is located in the clamping groove 321, and the connecting rod 340 will not move towards the fixed block 320; then, the clamping driving member 360 drives the sliding member 351 to move in the direction towards the fixed block 320, at this time, the telescopic structure 353 is contracted relative to the connecting rod 340, and the guide post 352 slides in the guide groove 3512 in the inclined upward direction, so that the connecting rod 340 rotates around the rotation axis of the rotation point in the direction towards the clamping groove 321, so as to reduce the clamping portion 370, and realize the clamping action on the bearing bush piece 20 in the clamping portion 370.

When the inner shaft tile 20 needs to be released from the clamping portion 370, the clamping driver 360 provides a driving force to the slider 351 away from the fixed block 320, and the slider 351 moves in a direction away from the fixed block 320; during the movement of the slider 351 from the final position closest to the fixed block 320 to the preset position, the guide post 352 moves in the guide groove 3512 in an obliquely downward direction, and the telescopic structure 353 stretches relative to the link 340, so that the link 340 rotates about the rotation axis of the rotation point in a direction away from the clamping groove 321, so as to enlarge the clamping portion 370, thereby releasing the shaft tile 20; when the sliding member 351 moves from the preset position to the initial position farthest from the fixed block 320, the sliding member 351 drives the connecting rod 340 and the movable block 330 to move linearly in the direction away from the fixed block 320 until the movable block 330 moves completely out of the clamping groove 321, so as to facilitate the taking and placing of the tiles 20 in the clamping groove 321.

Further, in some embodiments, an end surface of the link 340 facing away from the end of the movable block 330 is provided with a telescopic hole 341. The telescopic structure 353 includes a telescopic rod 3531 and an elastic member 3532. The telescopic rod 3531 is movably inserted into the telescopic hole 341. The elastic member 3532 is disposed in the telescopic hole 341 and is used for providing an elastic force for the telescopic rod 3531 facing away from the fixed block 320. The elastic member 3532 may be a spring, a metal elastic sheet, a rubber pad, a rubber band, etc., so long as the elastic member can provide a reverse elastic force for the telescopic rod 3531. In actual use, when the force of the slider 351 acting on the telescopic rod 3531 is greater than the elastic force of the elastic member 3532 acting on the telescopic rod 3531, the telescopic rod 3531 is contracted inward with respect to the telescopic hole 341; when the force on the retracting lever by the sliding member 351 is smaller than the elastic force of the elastic member 3532 on the telescopic lever 3531, the telescopic lever 3531 is extended outward with respect to the telescopic hole 341. Therefore, the telescopic rod 3531 cooperates with the elastic member 3532, so that the telescopic structure 353 can realize a telescopic function.

Specifically, an end portion of the telescopic rod 3531 located at one end in the telescopic hole 341 is provided with a mounting hole (not shown). The elastic member 3532 is a telescopic spring. One end of the telescopic spring is penetrated in the mounting hole, and the other end of the telescopic spring is propped against the inner wall of the telescopic hole 341. The arrangement of the mounting holes not only facilitates the mounting of the elastic members 3532, but also prevents the elastic members 3532 from sliding on the telescopic rod 3531, thereby improving the reliability of the bearing pad broaching fixture 300.

Referring to fig. 3 again, further, in some embodiments, a limiting block 381 is disposed on a side wall of the link 340. When the sliding member 351 moves to the preset position, the limiting block 381 abuts against the edge of the opening at one end of the sliding slot 311 away from the fixed block 320. Therefore, the limiting block 381 limits the moving position of the connecting rod 340 in the horizontal direction, so that the connecting rod 340 does not continue to do linear motion along the direction towards the fixed block 320 when the sliding piece 351 moves to the preset position, thereby ensuring that the connecting rod 340 can accurately drive the movable block 330 into the clamping groove 321, ensuring that the movable block 330 can be accurately pressed towards the bearing bush piece 20 in the clamping groove 321, and improving the operation precision of the bearing bush piece broaching fixture 300.

Further, in some embodiments, the linkage assembly 350 further includes a resilient return 354. The resilient return member 354 is configured to provide a resilient force to the guide post 352 that urges the guide post 352 in a diagonally downward direction within the guide groove 3512. The elastic restoring member 354 may be a metal elastic sheet, a spring, a rubber band, etc. In this embodiment, the return spring is an extension spring, and both free ends of the extension spring are connected to the guide post 352 and the slider 351, respectively.

In the actual use process, under the action of the elastic force provided by the elastic restoring member 354, the guide post 352 slides in the guide groove 3512 along the downward direction, so as to drive the connecting rod 340 to rotate around the rotation point along the direction away from the clamping groove 321, so that the movable block 330 is separated from the bearing bush piece 20 in the clamping groove 321, and the loosening of the bearing bush piece 20 is realized. Thus, the arrangement of the elastic restoring member 354 can realize the automatic restoration of the guide post 352 and the connecting rod 340, and further improve the degree of automation of the bearing bush piece broaching fixture 300.

Referring to fig. 4 and 8, in some embodiments, the chassis 210 further includes a rotating shaft 316 rotatably mounted at a rotation point. The side of the connecting rod 340 facing the rotation point is provided with a guide groove 342 matched with the rotation cylinder 316. When the guide posts 352 are of a cylindrical structure protruding from two sides of the connecting rod 340, the number of the rotating cylinders 316 is two, and the two rotating cylinders 316 are coaxially and oppositely arranged, so as to ensure the stability of the connecting rod 340 during sliding in the sliding slot 311. The rotating cylinder 316 may be a straight rod structure, a stepped shaft structure, a pin shaft, or the like.

Because the rotating cylinder 316 is rotatable relative to the inner wall of the chute 311, the connecting rod 340 is more labor-saving when sliding in the chute 311, and when the connecting rod 340 rotates around the rotating cylinder 316, the rotating cylinder 316 cooperates with the side wall of the guiding groove 342 to ensure the reliability and sensitivity of the rotating process of the connecting rod 340.

Referring to fig. 7 and 8 again, in some embodiments, a traction portion 343 is disposed at an end of the link 340 away from the movable block 330. The pulling portion 343 is located within the connection chamber 3511. As the link 340 moves within the connection chamber 3511, the traction 343 also moves within the connection chamber 3511. When the sliding member 351 drives the connecting rod 340 to move in a direction away from the fixed block 320, the traction portion 343 is hooked on a side wall of the connecting chamber 3511 near the fixed block 320.

Therefore, when the clamping driving member 360 drives the sliding member 351 to move to the preset position along the direction away from the fixed block 320, the sliding member 351 drives the connecting rod 340 to perform a linear motion along the direction away from the fixed block 320 through the traction portion 343 and the guide post 352, so that the traction portion 343 has a traction function. In addition, in the process that the sliding member 351 drives the connecting rod 340 to linearly move in the direction away from the fixed block 320, the traction portion 343 is hooked on the side wall of the connecting chamber 3511, so that the condition that the connecting rod 340 is separated from the connecting chamber 3511 due to the damage of the guide post 352 or other reasons is prevented, and the reliability of the bearing bush piece broaching fixture 300 is improved.

Further, in some embodiments, the length direction of the guide groove 3512 is parallel to the bottom surface of the connection chamber 3511. Thereby, the bottom surface of the connection chamber 3511 is disposed obliquely with respect to the horizontal plane. The drawing portion 343 is in contact with the bottom surface of the connection chamber 3511 and is slidable in the inclined direction of the connection chamber 3511. When the guide post 352 slides in the guide groove 3512 to drive the connecting rod 340 to rotate around the rotating shaft at the rotating point, the traction portion 343 slides on the bottom surface of the connecting chamber 3511 synchronously, so that stability of the connecting rod 340 in the rotating process is improved.

Referring to fig. 3, 8 and 9, in some embodiments, a limiting groove 344 is formed at an end of the connecting rod 340 away from the end of the linkage assembly 350. The limiting groove 344 extends in the longitudinal direction of the link 340. The top surface of the movable block 330 is provided with a clearance groove 331. The bottom surface of keep away position recess 331 is provided with mounting panel 332 that matches with spacing groove 344. The mounting plate 332 is rotatably mounted in the limit groove 344.

When the connecting rod 340 rotates around the rotating shaft of the rotating point along the direction towards the clamping groove 321, the limiting groove 344 can be sleeved on the mounting plate 332 to limit the movable block 330, so that the movable block 330 can be prevented from shaking in the direction perpendicular to the connecting rod 340, the structural stability of the bearing bush piece broaching fixture 300 in the operation process is ensured, and the clamping effect of the bearing bush piece broaching fixture 300 on the bearing bush piece 20 is further improved.

In some embodiments, the bearing pad broaching fixture 300 also includes a flattening mechanism 390. The flattening mechanism 390 includes a flattening member 391 and a pressing down driving member 392. The flattening member 391 is adapted to be mounted on the bed 100 of the axle-tile-dedicated broaching machine 10 and is located at the upstream end of the broaching tool 500. The pressing down driving member 392 is in driving connection with the flattening member 391 for providing a driving force for driving the flattening member 391 to move downward when the chassis 210 passes under the flattening member 391 for flattening the two bisecting surfaces 21 of the shaft tile 20. The flattening member 391 may have a plate-like or block-like structure.

When the main slide carriage 200 drives the bearing bush piece 20 to move right below the flattening piece 391, the pressing driving piece 392 drives the flattening piece 391 to move downwards so as to apply a pressure to the two bisectors 21 of the shaft tile 20, thereby ensuring that the two bisectors 21 of the shaft tile 20 are positioned in the same plane, improving the positioning precision of the shaft tile 20 in the clamping part 370, and ensuring the machining precision of the broach 500 when the two bisectors 21 of the shaft tile 20 are subjected to broaching. Thus, the provision of the flattening mechanism 390 further improves the machining accuracy of the bearing pads 20.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (9)

1. The bearing bush piece broaching clamp is characterized by comprising a bottom frame with a sliding groove, a fixed block with a clamping groove, a movable block, a connecting rod, a linkage assembly and a clamping driving piece, wherein the linkage assembly and the clamping driving piece are slidably arranged on the bottom frame; the side wall of the chute is provided with a rotation point;

the fixed block is fixedly arranged on the underframe; the extending direction of the clamping groove is consistent with the extending direction of the sliding groove;

the connecting rod is movably arranged in the chute along the lengthwise direction of the connecting rod; one end of the connecting rod is rotationally connected with the movable block, and the other end of the connecting rod is movably connected with the linkage assembly;

the clamping driving piece is in transmission connection with the linkage assembly and is used for providing a driving force for driving the linkage assembly to move along the direction towards or away from the fixed block;

when the movable block is positioned in the clamping groove, a clamping part for clamping the shaft tile is formed between the movable block and the inner wall of the clamping groove;

in the moving process of the linkage assembly, the linkage assembly can operatively drive the connecting rod to rotate around the rotating shaft of the rotating point position so as to adjust the size of the clamping part; the linkage assembly comprises a sliding part with a connecting cavity, a guide column and a telescopic structure;

the side wall of the sliding part is provided with a strip-shaped guide groove communicated with the connecting cavity; the height of the guide groove, which is close to one end of the fixed block, is smaller than the height of the guide groove, which is far away from one end of the fixed block;

the telescopic structure is arranged at the end part of the connecting rod, which is far away from one end of the movable block, and is propped against the inner wall of the connecting cavity; the telescopic structure is telescopic relative to the connecting rod;

the clamping driving piece is in transmission connection with the sliding piece and is used for providing a driving force for driving the sliding piece to move along the direction towards or away from the fixed block; when the sliding piece moves to a preset position, the guide post slides in the guide groove so as to drive the connecting rod to rotate around the rotating shaft of the rotating point along the direction facing or deviating from the clamping groove.

2. The bushing-piece broaching fixture of claim 1, wherein said undercarriage includes a base plate, a first support, and a second support; the first supporting piece and the second supporting piece are arranged on the bottom plate at intervals; the first supporting piece is provided with the sliding groove; the fixed block is arranged on the bottom plate and is positioned at one side of the first supporting piece, which is away from the second supporting piece; the linkage assembly is slidably mounted on the second support.

3. The bushing-plate broaching fixture of claim 2, wherein said runner is open to a top surface of said first support; a limit baffle is detachably arranged at the opening of the chute; the connecting rod is located below the limit baffle.

4. The bearing bush piece broaching fixture according to claim 1, wherein the end face of the connecting rod, which is away from one end of the movable block, is provided with a telescopic hole; the telescopic structure comprises a telescopic rod and an elastic piece; the telescopic rod can movably penetrate through the telescopic hole; the elastic piece is arranged in the telescopic hole and is used for providing an elastic force for the telescopic rod, which is opposite to the fixed block; or (b)

A limiting block is arranged on the side wall of the connecting rod; when the sliding piece moves to a preset position, the limiting block is propped against the edge of the opening at one end, deviating from the fixed block, of the sliding groove; or (b)

The linkage assembly further comprises an elastic reset piece; the elastic reset piece is used for providing an elastic force for the guide post to drive the guide post to move in the guide groove along the downward inclined direction.

5. A bearing bush piece broaching fixture according to claim 1, wherein a traction portion is provided at an end of the connecting rod remote from the movable block; the traction part is positioned in the connecting cavity; when the sliding piece drives the connecting rod to move along the direction deviating from the fixed block, the traction part is hooked on the side wall of the connecting cavity, which is close to one side of the fixed block.

6. The bushing-piece broaching fixture of claim 5, wherein the bottom surface of the connecting chamber is parallel to the length of the guide slot; the traction part is contacted with the bottom surface of the connecting chamber and can slide along the inclined direction of the bottom surface of the connecting chamber.

7. The bearing bush piece broaching fixture according to claim 1, wherein a limit groove is formed in one end of the connecting rod away from the linkage assembly; the limiting groove extends along the longitudinal direction of the connecting rod; the top surface of the movable block is provided with a clearance groove; the bottom surface of the avoidance groove is provided with a mounting plate matched with the limit groove; the mounting plate is rotatably mounted in the limit groove; or (b)

A limiting piece is arranged at the edge part of the limiting groove facing one side of the sliding groove; the limiting piece is used for propping against one end, facing the sliding groove, of the inner shaft tile of the clamping part.

8. The bushing-plate broaching fixture of claim 1, further comprising a flattening mechanism; the flattening mechanism comprises a flattening piece and a pressing driving piece; the flattening piece is arranged on the lathe bed of the broaching machine special for the axle tile and is positioned at the upstream end of the broaching tool; the lower pressing driving member is in driving connection with the flattening member for providing a driving force for driving the flattening member downward to flatten the two bisecting surfaces of the bearing pads when the chassis passes under the flattening member.

9. A broaching machine special for bearing bush sheets, which is characterized by comprising a lathe bed, a main slide carriage arranged on the lathe bed, a bearing bush sheet broaching clamp, a driving mechanism and a broach, wherein the bearing bush sheet broaching clamp is as claimed in any one of claims 1 to 8;

the lathe bed is provided with a feeding station, a broaching station and a discharging station which are arranged at intervals; the underframe is arranged on the main slide carriage;

the driving mechanism is in transmission connection with the main slide carriage and is used for providing a driving force for driving the main slide carriage to move along the linear direction; the main slide carriage sequentially passes through the feeding station, the broaching station and the discharging station in the moving process;

the broach is arranged at the broaching station and is used for carrying out broaching on two bisecting surfaces of the inner shaft tile of the clamping part when the main slide carriage passes through the broaching station.

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