CN212634339U

CN212634339U - Spindle device of processing machine

Info

Publication number: CN212634339U
Application number: CN202022101280.9U
Authority: CN
Inventors: 叶横灿
Original assignee: Kenturn Nano Tec Co ltd
Current assignee: Kenturn Nano Tec Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-03-02
Anticipated expiration: 2030-09-23

Abstract

A spindle device for a processing machine is suitable for feeding fluid and clamping a tool. The processing machine spindle device comprises a shaft seat unit, a spindle unit and a pressure cylinder unit. The shaft seat unit comprises a spindle seat, a spindle chamber and a plurality of bearings. The main shaft unit comprises a main shaft, a middle hole, a cutter bar group and a plurality of main springs. The set of blades is defined to extend along an extension axis. The cutter bar group is provided with a cutter pulling bar and a clamping jaw. The cylinder unit comprises a cylinder seat, an accommodating chamber, a first piston piece and a second piston piece. The first piston piece and the second piston piece define the chamber with a first area, a second area and a buffer area which are arranged in sequence along the extension direction of the extension axis. The cylinder base has a first wall, a second wall, a surrounding wall, a first opening and a second opening. The fluid input can cause the first piston member to move and the second piston member can provide a thrust force opposite to the direction of movement of the first piston member to reduce the impact force on the spindle.

Description

Spindle device of processing machine

Technical Field

The utility model relates to a part of lathe especially relates to a processing machine spindle unit.

Background

Referring to fig. 1 and 2, a conventional spindle apparatus for a machining apparatus includes an upper seat unit 11, a lower seat unit 12, and a spindle unit 13.

The upper seat unit 11 has a support base 111, a cylinder base 112 connected to the support base 111, and a piston member 113 disposed on the cylinder base 112. The cylinder block 112 can be pushed by hydraulic oil to displace the piston member 113 up and down.

The lower base unit 12 is connected to the lower portion of the supporting base 111, and has a base body 121, a spindle chamber 122 defined by the base body 121, and a plurality of bearings 123 disposed in the spindle chamber 122.

The spindle unit 13 has a spindle 131 disposed in the spindle chamber 122 and having an outer peripheral surface abutting against the bearing 123, a central hole 132 penetrating through the spindle 131, a cutter bar set 133 penetrating through the central hole 132 and capable of moving up and down relative to the spindle 131, and a plurality of springs 134 disposed in the central hole 132 and capable of constantly maintaining the cutter bar set 133 moving upward relative to the spindle 131. The knife bar set 133 has a jaw member 135 at the lower end and two pushing blocks 136 at the upper end and driven by the piston member 113 to move downward.

When a user uses the conventional spindle device of a machining apparatus, hydraulic oil is input into the cylinder block 112 to move the piston 113 upward (fig. 1) or downward (fig. 2), the push block 136 and the jaw member 135 are driven by the spring 134 and the piston 113 to move upward or downward relative to the spindle 131, and the jaw member 135 is adapted to the shape of the inner circumferential surface of the spindle 131 to clamp (fig. 1) or loosen (fig. 2) a tool 14.

However, when the piston member 113 drives the pushing block 136 to displace the cutter bar assembly 133 downward, it is easy to impact the spindle 131 and damage the components (such as the bearing 123) around the spindle 131, which may affect the precision of the conventional spindle device of the processing machine and shorten the service life.

Disclosure of Invention

An object of the utility model is to provide a can reduce the processing machine spindle unit of the impact force that produces the main shaft when moving back the sword.

The utility model discloses processing machine spindle unit is applicable to input fluid and centre gripping cutter. The processing machine spindle device comprises a shaft seat unit, a spindle unit and a pressure cylinder unit. The shaft seat unit comprises a spindle seat, a spindle chamber defined by the spindle seat, and a plurality of bearings arranged in the spindle chamber.

The spindle unit comprises a spindle, a middle hole, a cutter bar group and a plurality of main springs, wherein the spindle is arranged in the spindle chamber, the peripheral surface of the spindle unit is abutted against the bearing and can rotate relative to the spindle seat, the cutter bar group penetrates through the middle hole of the spindle, the cutter bar group penetrates through the middle hole, and the main springs are arranged in the middle hole. The cutter bar set extends along an extension axis, and is provided with a cutter bar capable of moving in a reciprocating mode along the extension direction of the extension axis relative to the main shaft, and a clamping jaw which is arranged at one end of two opposite ends of the cutter bar along the extension direction of the extension axis, can be driven by the cutter bar and is suitable for clamping or releasing the cutter.

The pressure cylinder unit is arranged at one end of the spindle base, which is relatively far away from the clamping jaw. The cylinder pressing unit comprises a cylinder pressing base, an accommodating chamber, a first piston piece and a second piston piece, wherein the first piston piece is arranged in the accommodating chamber, is relatively close to the spindle base and can drive the pull rod to move along the extension axis towards the direction of the clamping jaw, and the second piston piece is arranged in the accommodating chamber and is relatively far away from the spindle base.

The first piston piece and the second piston piece define the chamber with a first area, a second area and a buffer area which are arranged in sequence along the extension direction of the extension axis, are isolated from each other and can change the volume. The cylinder seat is provided with a first wall relatively adjacent to the clamping jaw, a second wall relatively far away from the clamping jaw and arranged at a distance from the first wall along the extension direction of the extension axis, a surrounding wall connected between the outer peripheries of the first wall and the second wall, and a first opening and a second opening which are arranged on the surrounding wall, respectively communicated with the first area and the second area and suitable for allowing the fluid to be respectively input into the first area and the second area. The first piston member is located between the first opening and the second opening and is movable between a clamping position and a releasing position relative to the spindle base along the extending direction of the extending axis. The second piston piece is located on one side of the first opening and one side of the second opening, which are opposite to each other and far away from the spindle seat.

The utility model discloses processing machine spindle unit, press the jar unit still including set up in the buffer area can constantly provide the messenger the second piston spare court the elastic component of the nearly holding power of first piston spare is organized.

The utility model discloses processing machine spindle unit, the elastic component of pressing the jar unit has the several and winds each other extend the reset spring that the axis interval set up.

The utility model discloses processing machine main shaft device, the clamping jaw of main shaft unit has the several pivot to locate the claw lamella of broach pole. The central opening has a jaw area corresponding to the jaw. The spindle unit further comprises a plurality of packing pieces which are arranged in the clamping jaw area, correspond to the jaw pieces respectively and are arranged around the cutter bar group at intervals.

The utility model discloses processing machine main shaft device, the main shaft of main shaft unit has and defines the packing face in clamping jaw district. Each claw piece is provided with a neck section which is relatively adjacent to the pressure cylinder unit and is pivoted on the pull rod, and a head section which is relatively far away from the pressure cylinder unit, and the outer contour of the head section is farther away from the extension axis than the outer contour of the neck section. Each clamping member is provided with an enlarged part relatively adjacent to the pressure cylinder unit and an extended part connected to the enlarged part and relatively far away from the pressure cylinder unit. The inner contour of the enlarged portion is closer to the extension axis than the inner contour of the extension portion.

The utility model discloses processing machine main shaft device, the main shaft unit still includes that the several is located the clamping jaw district and lean on respectively to support in compel the guide of tight piece, and the several connect respectively in the guide spring of guide.

The utility model discloses a profitable effect lies in: by arranging the second piston member, when a user releases the clamped tool and operates the fluid to flow into the second region, the fluid drives the first piston member to approach the spindle base and the second piston member to separate from the spindle base, so that the moving speed of the first piston member and the tool bar set can be reduced, a thrust opposite to the moving direction of the first piston member is provided, and the impact force on the spindle is reduced.

Drawings

FIG. 1 is a cross-sectional view of a prior art machine spindle assembly illustrating a piston member moving upwardly and a jaw member holding a tool;

FIG. 2 is another cross-sectional view of the prior art machine spindle assembly illustrating the piston member moving downward and the jaw members releasing a tool;

FIG. 3 is a cross-sectional view of an embodiment of the present invention machine spindle assembly showing a first piston member in a release position, the first piston member being relatively closer to a spindle housing, and two urging members having a gap with an urging surface to allow rotation of two jaw members away from a puller bar;

fig. 4 is another cross-sectional view of the embodiment, illustrating the first piston member in a clamping position, the first piston member being relatively far from the spindle base, each urging member engaging the urging surface to position each jaw relative to the broach rod.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 3 and 4, an embodiment of the present invention is a spindle assembly for a machine tool adapted to receive a fluid (not shown) and to hold a tool (not shown). In the present embodiment, the fluid is a hydraulic oil, but is not limited thereto.

The processing machine main shaft device comprises a shaft seat unit 2, a main shaft unit 3 and a pressure cylinder unit 4.

The shaft seat unit 2 includes a spindle seat 21, a spindle chamber 22 defined by the spindle seat 21, and a plurality of bearings 23 disposed in the spindle chamber 22.

The spindle unit 3 includes a spindle 31 disposed in the spindle chamber 22 and having an outer peripheral surface abutting against the bearing 23, a central hole 32 penetrating through the spindle 31, two slot holes 33 penetrating through the spindle 31 and communicating with the central hole 32, a knife bar assembly 34 penetrating through the central hole 32, a plurality of main springs 35 disposed in the central hole 32, and a plurality of urging members 36, a plurality of guide members 37 and a plurality of guide springs 38 (only two urging members 36, two guide members 37 and two guide springs 38 are shown in fig. 3 and 4) disposed in the central hole 32 and spaced around the knife bar assembly 34.

The set of blades 34 is defined to extend along an extension axis L. The spindle 31 is rotatable about the extension axis L relative to the spindle base 21.

The cutter bar set 34 has a pulling bar 341, a clamping jaw 342 disposed at one of two opposite ends of the pulling bar 341 along the extending direction of the extending axis L, and two pushing blocks 343 connected to one end of the pulling bar 341 opposite to the clamping jaw 342 and respectively penetrating through the slot 33. The broaching bar 341 is capable of reciprocating relative to the main shaft 31 along the extending direction of the extending axis L and is adapted to drive the clamping jaws 342 to clamp or release the tool.

The clamping jaw 342 has a plurality of jaw members 344 (only two jaw members 344 are shown in fig. 3 and 4) pivotally mounted to the puller bar 341. Each claw 344 has a neck 345 relatively adjacent to the pressing cylinder unit 4 and pivotally mounted on the pulling rod 341, and a head 346 relatively distant from the pressing cylinder unit 4. The outer contour of the head segment 346 is further away from the extension axis L than the outer contour of the neck segment 345.

The central hole 32 has a clamping jaw area 321 corresponding to the clamping jaw 342, and a penetrating area 322 communicating with the clamping jaw area 321 and relatively adjacent to the press cylinder unit 4. The penetration area 322 is stepped hole-shaped and expands in the direction of the cylinder unit 4. The main spring 35 is disposed in the penetrating region 322 and constantly provides a supporting force for moving the pulling rod 341 along the extending axis L in a direction away from the clamping jaw 342.

The spindle 31 has a clamping surface 311 which delimits the clamping jaw region 321.

The packing members 36 are disposed in the jaw areas 321 and respectively correspond to the jaw pieces 344. Each urging member 36 has an enlarged portion 361 relatively adjacent to the cylinder unit 4, and an extended portion 362 connected to the enlarged portion 361 and relatively distant from the cylinder unit 4. The inner contour of the enlarged portion 361 is closer to the extension axis L than the inner contour of the extension portion 362.

The guiding members 37 are disposed in the clamping jaw area 321 and respectively abut against the fastening members 36. The guide springs 38 are connected to the guide members 37, respectively, and each guide spring 38 can drive the respective guide member 37 to constantly provide a supporting force for the respective urging member 36 to be engaged with the respective pawl 344.

The pressure cylinder unit 4 is disposed at an end of the spindle base 21 relatively far from the clamping jaw 342. The cylinder unit 4 includes a cylinder base 41, an accommodating chamber 42, a first piston 43 disposed in the accommodating chamber 42 and relatively adjacent to the spindle base 21 and connected to the push block 343, and capable of driving the pull rod 341 to move along the extension axis L toward the direction of the clamping jaw 342, a second piston 44 disposed in the accommodating chamber 42 and relatively far away from the spindle base 21, an elastic element group 45, and a transmission member 46 for inserting the push block 343 and capable of being driven by the first piston 43 to move along the extension axis L toward the direction of the clamping jaw 342.

The first piston member 43 and the second piston member 44 define the chamber 42 with a first region 421, a second region 422 and a buffer region 423 which are arranged in sequence along the extension direction of the extension axis L, are isolated from each other and can change volume.

The cylinder base 41 has a first wall 411 relatively adjacent to the clamping jaw 342, a second wall 412 relatively distant from the clamping jaw 342 and spaced from the first wall 411 along the extending direction of the extending axis L, a surrounding wall 413 connecting the first wall 411 and the outer periphery of the second wall 412, and a first opening 414 and a second opening 415 respectively communicating the first area 421 and the second area 422 and provided in the surrounding wall 413. The first piston member 43 is located between the first opening 414 and the second opening 415, and the second piston member 44 is located on a side of the first opening 414 and the second opening 415 opposite to the spindle base 21.

The elastic member set 45 is disposed in the buffer area 423 and constantly provides a supporting force for approaching the second piston member 44 toward the first piston member 43. The set 45 has a plurality of return springs 451 (only two of the return springs 451 are shown in fig. 3 and 4) spaced apart from each other about the extension axis L.

The first opening 414 and the second opening 415 are adapted to allow the fluid to be respectively input into the first region 421 and the second region 422, so that the first piston member 43 moves between a clamping position and a releasing position relative to the spindle base 21 along the extending direction of the extending axis L.

When the first piston member 43 is in the clamping position (see fig. 4), the fluid flows into the first region 421 to move the first piston member 43 relatively away from the spindle base 21, the first piston member 43 relatively away from the transmission member 46, the pulling rod 341 is moved by the main spring 35 along the extension axis L in a direction away from the clamping jaws 342, and moves the neck section 345 and the head section 346 of each jaw 344 against the enlarged portion 361 and the extended portion 362 of the corresponding clamping member 36, respectively, and each clamping member 36 abuts against the pressing surface 311 to position each jaw 344 relative to the pulling rod 341, thereby making the clamping jaws 342 suitable for clamping the tool.

When the first piston member 43 is in the release position (see fig. 3), the fluid flows into the second region 422, so that the first piston member 43 relatively approaches the spindle base 21 and the second piston member 44 relatively moves away from the spindle base 21, the first piston member 43 presses downward to move the transmission member 46 downward, the pushing block 343 is driven by the transmission member 46 to move the pulling rod 341 along the extension axis L toward the clamping jaws 342 and moves to make the neck section 345 of each jaw 344 correspond to the extension 362 of the corresponding clamping member 36, and a gap 323 is formed between each clamping member 36 and the pressing surface 311 to allow the head section 346 of each jaw 344 to rotate away from the pulling rod 341, so that the clamping jaws 342 are suitable for releasing the tool.

Therefore, when a user operates the machine spindle device to clamp or release the tool, the fluid only needs to flow into the first region 421 and the second region 422, respectively, so as to clamp or release the tool by using the transmission principle of the above components.

When the user releases the clamped tool, the fluid is flowed into the second region 422, and the fluid is driven to approach the spindle base 21 and move the second piston 44 away from the spindle base 21, so as to slow the moving speed of the first piston 43 and the spindle set 34, and provide a reverse thrust opposite to the moving direction of the first piston 43 at the moment when the fluid flows into the second region 422, so as to counteract the impact force generated to the spindle 31 when the first piston 43 moves instantaneously, and reduce the wear of the parts (such as the bearing 23) around the spindle 31.

When the user wants to clamp the tool again, the fluid is flowed into the first region 421, the fluid drives the first piston member 43 away from the spindle base 21 to return to the clamping position, and the pressure applied to the second piston member 44 by the fluid in the second region 422 is reduced, so that the elastic member set 45 pushes the second piston member 44 to move toward the first piston member 43 and return to a position relatively close to the spindle base 21, so as to reserve a moving space for the second piston member 44 to move when the tool is subsequently released again.

It should be noted that by providing the guide member 37 and the guide spring 38, a supporting force for making each urging member 36 fit to the respective claws 344 can be provided, so that the wobbling of the blade unit 34 can be reduced when the first piston member 43 moves from the clamping position to the releasing position, and thus the impact force on the spindle 31 can also be reduced.

It is worth mentioning that, since the main spring 35 can constantly provide a supporting force for moving the push block 343 away from the spindle base 21, when the first piston member 43 is in the clamping position, the main spring 35 can help to keep the first piston member 43 in the clamping position, thereby preventing the clamping jaws 342 from being easily released.

To sum up, the present invention provides a spindle device of a machining tool, wherein the second piston member 44 is provided, when the user releases the clamped tool and operates to make the fluid flow into the second region 422, the fluid drives the first piston member 43 to approach the spindle housing 21 and make the second piston member 44 to be away from the spindle housing 21, so as to slow down the moving speed of the first piston member 43 and the tool bar assembly 34, and provide a reverse thrust opposite to the moving direction of the first piston member 43 at the moment when the fluid flows into the second region 422, so as to offset the impact force generated to the spindle 31 when the first piston member 43 moves instantaneously, and further reduce the loss of the parts (e.g., the bearing 23) around the spindle 31, thereby achieving the objective of the present invention.

The above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the specification should be included in the scope of the present invention.

Claims

1. A kind of processing machine main axis device, is suitable for inputting the fluid and centre gripping cutting tool, the said processing machine main axis device includes the axle bed unit, main axis unit, and presses the cylinder unit, the said axle bed unit includes the main axis seat, the main axis room that is defined out by the said main axis seat, and several locates the bearing of the said main axis room, characterized by:

the main shaft unit comprises a main shaft which is arranged in the main shaft chamber, the outer peripheral surface of the main shaft unit is abutted against the bearing and can rotate relative to the main shaft seat, a middle hole which penetrates through the main shaft, a cutter bar group which is arranged in the middle hole in a penetrating way, and a plurality of main springs which are arranged in the middle hole and define that the cutter bar group extends along an extending axis, the cutter bar group is provided with a broach bar which can move in a reciprocating way relative to the main shaft along the extending direction of the extending axis, and a clamping jaw which is arranged at one end of two opposite ends of the broach bar along the extending direction of the extending axis and can be driven by the broach bar and is suitable for clamping or releasing the cutter,

the pressure cylinder unit is arranged at one end of the spindle base, which is relatively far away from the clamping jaw, and comprises a pressure cylinder base, an accommodating chamber, a first piston piece which is arranged in the accommodating chamber, is relatively close to the spindle base and can drive the broach rod to move towards the clamping jaw along the extension axis, and a second piston piece which is arranged in the accommodating chamber and is relatively far away from the spindle base,

the first piston member and the second piston member define the chamber with a first area, a second area and a buffer area which are sequentially arranged along the extending direction of the extending axis and are isolated from each other and can change the volume, the cylinder base is provided with a first wall relatively adjacent to the clamping jaws, a second wall relatively far away from the clamping jaws and arranged at a distance from the first wall along the extending direction of the extending axis, a surrounding wall connecting the outer peripheries of the first wall and the second wall, and a first opening and a second opening which are arranged on the surrounding wall and respectively communicated with the first area and the second area and are suitable for supplying the fluid into the first area and the second area respectively, the first piston member is arranged between the first opening and the second opening and can move between a clamping position and a releasing position relative to the spindle base along the extending direction of the extending axis, the second piston piece is located on one side of the first opening and one side of the second opening, which are opposite to each other and far away from the spindle seat.

2. The finisher spindle assembly of claim 1, wherein: the cylinder unit further comprises an elastic element group which is arranged in the buffer area and can constantly provide supporting force for enabling the second piston piece to approach the first piston piece.

3. The finisher spindle assembly of claim 2, wherein: the elastic element group of the pressure cylinder unit is provided with a plurality of return springs which are arranged around the extending axis at intervals.

4. The finisher spindle assembly of claim 1, wherein: the clamping jaw of main shaft unit has the several pivot and locates draw the claw lamella of cutter arbor, the mesopore has the correspondence the clamping jaw district of clamping jaw, main shaft unit still includes that the several is located the clamping jaw district and correspond respectively the claw lamella just winds the packing piece that the cutter arbor group interval set up.

5. The machine spindle assembly of claim 4 wherein: the main shaft of the main shaft unit is provided with a clamping surface which defines the clamping jaw area, each clamping jaw is provided with a neck section which is relatively adjacent to the pressure cylinder unit and is pivoted on the pull rod, and a head section which is relatively far away from the pressure cylinder unit, the outer contour of the head section is more far away from the extension axis than the outer contour of the neck section, each clamping piece is provided with an enlarged part which is relatively adjacent to the pressure cylinder unit, and an extension part which is connected to the enlarged part and is relatively far away from the pressure cylinder unit, and the inner contour of the enlarged part is closer to the extension axis than the inner contour of the extension part.

6. The machine spindle assembly of claim 4 wherein: the spindle unit also comprises a plurality of guide members which are arranged in the clamping jaw area and respectively abut against the packing member, and a plurality of guide springs which are respectively connected with the guide members.