CN204545905U - A kind of self-centering hydraulic fixture - Google Patents

Abstract

The utility model relates to a kind of self-centering hydraulic fixture.Comprise gripper shoe, be characterized in that gripper shoe has slot, support plate upper surface has the hood-shaped support that can cover slot.Near between the two side at hood-shaped support two, all have bearing pin, bearing pin all has shift fork, and described shift fork all has two shifting blocks.Hood-shaped cradle top is connected with vertical sliding sleeve, has hydraulic cylinder above vertical sliding sleeve, and the piston rod of hydraulic cylinder to be stretched in hood-shaped support by vertical sliding sleeve and is connected with pull bar.Both sides, pull bar lower end are all fluted, and a pair shifting block that two shift forks are relative stretches in corresponding recesses respectively.Have two pieces of slide plates below gripper shoe, two pieces of slide plates all have pulling hole, two shifting blocks of two another homonymies of shift fork insert in corresponding pulling hole respectively.All fixture block is connected with below slide plate.Adopt the utility model, do not need to adjust Clamping Center, can greatly enhance productivity.Be applicable to clamping that is shaft-like or tubular workpiece.

Description

A kind of self-centering hydraulic fixture

Technical field

The utility model relates to a kind of fixture.Specifically, be used to the self-centering fixture clamping workpiece to be machined, be particularly useful for the clamping to shaft-like or tubular workpiece on automatic assembly line.

Background technology

All know at mechanical processing industry, on some automatic assembly lines, fixture need be adopted to be fixed shaft-like or tubular workpiece.Traditional fixture is included in support side and arranges a fixed clamp block, the dynamic fixture block of a dependence actuating unit promotion is set at the offside of clamp block again, promote dynamic fixture block by actuating unit, shaft-like or tubular workpiece can be realized to be clamped between clamp block and dynamic fixture block.Because the actuating unit of above-mentioned fixture by clamp block, dynamic fixture block and the dynamic fixture block of promotion forms, clamp block is in the state of maintaining static all the time, and only have dynamic fixture block in motion, when after the shaft-like or tubular workpiece assembling completing a kind of specification (a kind of diameter), when more shaft-like the or tubular workpiece of another kind of specification (another kind of diameter) being assembled, just need to unload clamp block to adjust Clamping Center, and the adjustment of Clamping Center is very difficult.Therefore, adopt above-mentioned fixture to clamp the shaft-like of different size or tubular workpiece, not only Clamping Center is aimed at more difficult, and production efficiency is low.

Utility model content

Problem to be solved in the utility model is to provide a kind of self-centering hydraulic fixture.Adopt this fixture to clamp the shaft-like of different size or tubular workpiece, do not need to adjust Clamping Center, can greatly enhance productivity.

The problems referred to above to be solved in the utility model are realized by following technical scheme:

Self-centering hydraulic fixture of the present utility model comprises gripper shoe, is characterized in that gripper shoe has slot, support plate upper surface has the hood-shaped support that can cover slot.On the two side at hood-shaped support two, all there is axis hole, between relative two side axis hole, all have bearing pin, described two bearing pins all have the shift fork that can rotate around bearing pin.Hood-shaped cradle top center has and is connected as a single entity and the vertical sliding sleeve be communicated with hood-shaped rack bore with it, has hydraulic cylinder above vertical sliding sleeve, and down and stretch in hood-shaped support by vertical sliding sleeve, described piston-rod lower end is connected with pull bar to the piston rod of hydraulic cylinder.Described shift fork all has two shifting blocks, and the angle between two shifting blocks on same shift fork is less than 90 degree.Both sides, pull bar lower end are all fluted, and the shifting block that described two shift forks are relative stretches in the corresponding recesses of pull bar lower end in moving type respectively.Have two pieces of slide plates that can slide along gripper shoe face below gripper shoe, the glide direction of described slide plate and the axis of bearing pin are perpendicular, and two pieces of slide plates all have pulling hole, and two shifting blocks of two another homonymies of shift fork are that slip shape inserts in corresponding pulling hole respectively.All fixture block is connected with below described slide plate.

Wherein, all there is lower chimb on the longitudinal both sides of lower surface of two gripper shoes, and the following of twice chimbs all has internal projection.All there is cannelure the both sides of two pieces of slide plate its upper surfaces contiguous, in being slidably matched between described cannelure and described internal projection.

As can be seen from the above scheme, due to gripper shoe having slot, support plate upper surface there are the vertical projection that can cover slot and the suitable hood-shaped support of slot.On the two side at hood-shaped support two, all there is axis hole, between relative two side axis hole, all have bearing pin, two bearing pins all have the shift fork that can rotate around bearing pin.Hood-shaped support has hydraulic cylinder, and down and stretch in hood-shaped support, and piston-rod lower end is connected with pull bar to the piston rod of hydraulic cylinder.Described shift fork all has two shifting blocks, and the angle between two shifting blocks on same shift fork is less than 90 degree.Both sides, pull bar lower end are all fluted, and the shifting block of described two shift fork homonymies stretches in the corresponding recesses of pull bar lower end in moving type respectively.Two pieces of slide plates that can slide along gripper shoe face are had below gripper shoe, the glide direction of described slide plate and the axis of described bearing pin perpendicular, two pieces of slide plates all have pulling hole, and two shifting blocks of two another homonymies of shift fork insert in the pulling hole on two pieces of slide plates in slip shape respectively.All fixture block is connected with below described slide plate.During work, inside contracting by hydraulic cylinder piston rod, pull bar can be driven to move up together, again by pull bar drive two shift forks respectively around corresponding bearing pin to inner rotary, and then to be driven together with two pieces of slide plates by the shifting block of two the shift fork homonymies be connected with two slide plates and inwardly slide, two fixture blocks be connected with slide plate are inwardly closed up, until realize clamping that is shaft-like or tubular workpiece.Otherwise, overhanging by hydraulic cylinder piston rod, stretch under can driving pull bar, two shift forks are driven inwardly to rotate around corresponding bearing pin respectively by pull bar again, and then to be driven together with two pieces of slide plates by the shifting block of two the shift fork homonymies be connected with two slide plates and outwards slide, two fixture blocks be connected with slide plate are outwards separated, relieves the clamping to shaft-like or tubular workpiece.As can be seen here; no matter be that shaft-like or tubular workpiece are clamped or removed clamping that is shaft-like or tubular workpiece; two fixture blocks are all inwardly close up or outwards separate simultaneously; the utility model is just determined its Clamping Center after finalization of the manufacture, avoids in use procedure afterwards the trouble and difficulty that need to adjust Clamping Center.Do not need to adjust Clamping Center due in use procedure afterwards again, no matter clamp the shaft-like or tubular workpiece of any specification (diameter), do not need to regulate Clamping Center, compared with background technology, can greatly enhance productivity.

Accompanying drawing explanation

Fig. 1 is self-centering hydraulic fixture structural representation of the present utility model;

Fig. 2 is the A-A cross-sectional schematic of Fig. 1, and two fixture blocks are wherein in closed configuration and are clamped with workpiece;

Fig. 3 is the A-A cross-sectional schematic of Fig. 1, and two fixture blocks are wherein in separated position.。

Detailed description of the invention

As shown in Figure 1, Figure 2 and Figure 3, self-centering hydraulic fixture of the present utility model comprises gripper shoe 4, gripper shoe 4 is processed with slot 9.Gripper shoe 4 upper surface is provided with hood-shaped support 3, and the oral area of hood-shaped support 3 is fixed on the surrounding of slot 9.On the two side at hood-shaped support 3 two, be all processed with axis hole, between relative two side axis hole, bearing pin 10 be all installed, described two bearing pins 10 are all provided with the shift fork 15 that can rotate around bearing pin 10.Hood-shaped support 3 top center be provided with to be connected as a single entity with it and with the vertical sliding sleeve 1 of hood-shaped support 3 inner space, above vertical sliding sleeve 1, hydraulic cylinder 12 is installed, down and stretch in hood-shaped support 3 by vertical sliding sleeve 1, described piston rod 11 lower end is connected with pull bar 13 to the piston rod 11 of hydraulic cylinder 12.

Described shift fork 15 is all containing two shifting blocks 16, and the angle between two shifting blocks 16 on same shift fork 15 is less than 90 degree.Both sides, pull bar 13 lower end are all processed with groove 14, and a pair shifting block 16 that described two shift forks 15 are relative stretches in a pair groove 14 of pull bar 13 lower end in moving type respectively.Gripper shoe 4 is provided with two pieces of slide plates 6 that can slide along gripper shoe 4 below, the glide direction of described slide plate 6 and the axis of bearing pin 10 perpendicular, two pieces of slide plates 6 are all processed with pulling hole 8, two shift forks 15 another relative shifting block 16 is inserted in corresponding pulling hole 8 in slip shape respectively.Described slide plate 6 is all connected with fixture block 17 below.

Wherein, the longitudinal both sides of the lower surface of two gripper shoes 4 are all processed with the following of lower chimb 5, twice chimbs 5 and are all processed with internal projection 7.The both sides of two pieces of slide plate 6 its upper surfaces contiguous are all processed with cannelure, in being slidably matched between described cannelure and described internal projection 7.

During work, by inside contracting of the piston rod 11 of hydraulic cylinder 12, pull bar 13 can be driven to move up together, again by pull bar 13 drive two shift forks 15 respectively around corresponding bearing pin 10 to inner rotary, and then to be driven together with two pieces of slide plates 6 by the shifting block 16 of two shift fork 15 homonymies be connected with two slide plates 6 and inwardly slide, two fixture blocks 17 be connected with slide plate 6 are inwardly closed up, until realize clamping that is shaft-like or tubular workpiece 18, sees Fig. 2.Otherwise, overhanging by the piston rod 11 of hydraulic cylinder 12, pull bar can be driven to stretch for 13 times, two shift forks 15 are driven inwardly to rotate around corresponding bearing pin 10 respectively by pull bar 13 again, and then to be driven together with two pieces of slide plates 6 by the shifting block 16 of two shift fork 15 homonymies be connected with two slide plates 6 and outwards slide, two fixture blocks 17 be connected with slide plate 6 are outwards separated, relieves clamping that is shaft-like or tubular workpiece 18, see Fig. 3.

Claims (2)

1. a self-centering hydraulic fixture, comprises gripper shoe (4), it is characterized in that gripper shoe (4) has slot (9), gripper shoe (4) upper surface has the hood-shaped support (3) that can cover slot (9); On the two side at hood-shaped support (3) two, all there is axis hole, all have bearing pin (10) between relative two side axis hole, described two bearing pins (10) all have the shift fork (15) that can rotate around bearing pin (10); Hood-shaped support (3) top center have to be connected as a single entity with it and with the vertical sliding sleeve (1) of hood-shaped support (3) inner space, there is hydraulic cylinder (12) vertical sliding sleeve (1) top, the piston rod (11) of hydraulic cylinder (12) also stretches in hood-shaped support (3) by vertical sliding sleeve (1) down, and described piston rod (11) lower end is connected with pull bar (13); Described shift fork (15) all has two shifting blocks (16), and the angle between two shifting blocks on same shift fork is less than 90 degree; Pull bar (3) both sides, lower end all fluted (14), relative a pair shifting block of described two shift forks (1) stretches in the corresponding recesses (14) of pull bar (3) lower end in moving type respectively, gripper shoe (4) has the two pieces of slide plates (6) can slided along gripper shoe (4) below, the glide direction of described slide plate (6) and the axis of bearing pin (10) perpendicular, two pieces of slide plates (6) all have pulling hole (8), and a pair shifting block of two another homonymies of shift fork (15) inserts in corresponding pulling hole (8) in slip shape respectively; Described slide plate (6) is all connected with fixture block (17) below.

2. self-centering hydraulic fixture according to claim 1, it is characterized in that all there is lower chimb (5) on the longitudinal both sides of the lower surface of two gripper shoes (4), the following of twice chimbs (5) all has internal projection (7); All there is cannelure the both sides of two pieces of slide plate (6) its upper surfaces contiguous, in being slidably matched between described cannelure and described internal projection (7).