CN219945363U

CN219945363U - Multi-station hydraulic clamp

Info

Publication number: CN219945363U
Application number: CN202320314342.5U
Authority: CN
Inventors: 周兴伟
Original assignee: CSG TRW Chassis Systems Co Ltd
Current assignee: CSG TRW Chassis Systems Co Ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-11-03
Anticipated expiration: 2033-02-24

Abstract

The utility model relates to a multi-station hydraulic clamp which comprises a pair of hydraulic cylinders, wherein the hydraulic cylinders are symmetrically fixed on the lower end face of a bridge plate, a piston rod of each hydraulic cylinder penetrates through the bridge plate to extend upwards, a hinge pressing plate is connected to the top end of each piston rod in a hinge mode, the upper end of each piston rod is connected with the middle part of each hinge pressing plate, a connecting block is fixed on the bridge plate on two sides of each piston rod, the upper end of each connecting block is connected with a locating block, a workpiece is placed above each locating block, the locating blocks are used for locating the workpiece, the hinge pressing plates can be driven by the pistons to press the workpiece on the locating blocks, an upper pressing block is arranged at the position, corresponding to the workpiece, of the lower end of each hinge pressing plate, a first pre-pressing mechanism for axially pre-pressing the workpiece is arranged on the lower end face of each upper pressing block, and a second pre-pressing mechanism for vertically pre-pressing the workpiece is also connected to the side of each upper pressing block. The utility model has compact integral structure, multiple stations, quick clamping, high precision and high efficiency.

Description

Multi-station hydraulic clamp

Technical Field

The utility model belongs to the technical field of tool clamps, and relates to a multi-station hydraulic clamp.

Background

For machining of automobile brake master cylinder workpieces, the traditional clamp is clamped by adopting a single piece and clamping is performed by manually rotating a screw, two hands are needed for clamping the workpieces due to lack of auxiliary pre-clamping, one hand is needed to prop against the workpieces, and the other hand is used for clamping, so that the efficiency is low, the labor intensity is high, and a great potential safety hazard exists.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide a multi-station hydraulic clamp capable of solving the above-described problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a multistation hydraulic fixture, including a pair of pneumatic cylinder, the pneumatic cylinder symmetry is fixed on the lower terminal surface of lamina bridge, the piston rod of pneumatic cylinder passes the lamina bridge and upwards extends, the top of piston rod links with the hinge clamp plate with the hinge mode, the upper end of piston rod is connected with the middle part of hinge clamp plate, be fixed with the connecting block on the lamina bridge of piston rod both sides, the upper end of connecting block is connected with the locating piece, the work piece is placed to the locating piece top, the locating piece is fixed a position the work piece, the hinge clamp plate can compress tightly the work piece on the locating piece under the drive of piston, the lower extreme of hinge clamp plate corresponds the position department with the work piece and is provided with the compact heap on, the lower terminal surface of compact heap is provided with the precompaction mechanism I that carries out axial precompaction to the work piece, the lateral part of going up the compact heap still is connected with the precompaction mechanism II that carries out the vertical precompaction to the work piece.

Further, a T-shaped screw is fixed on the connecting block, a T-shaped groove matched with the T-shaped screw is formed in the lower end face of the positioning block, and the T-shaped groove of the positioning block horizontally penetrates through the bottom face of the positioning block in the front-rear direction.

Further, a cross-shaped positioning groove is formed in the upper end face of the rear portion of the connecting block, longitudinal positioning keys are fixed in grooves in the front and rear directions of the cross-shaped positioning groove, T-shaped screws are fixed at the front ends of the longitudinal positioning keys, transverse positioning keys are fixed in transverse cross-shaped positioning grooves on two sides of the longitudinal positioning keys, the rear end face of the positioning block abuts against the transverse positioning keys, and the longitudinal positioning keys are embedded into T-shaped grooves at the bottom of the positioning block.

Further, the lower end face of the hinge pressing plate is connected with the upper pressing block through an inverted T-shaped block, a T-shaped through groove matched with the T-shaped block is formed in the upper end face of the upper pressing block, the first pre-pressing mechanism comprises a thrust sleeve, a thrust spring and a thrust pin, a counter bore is formed in the lower end face of the upper pressing block, the thrust sleeve is located in the counter bore, an opening of the thrust sleeve faces downwards, the thrust spring is located in the thrust sleeve, the upper end of the thrust pin is located in the thrust sleeve, the lower end of the thrust pin extends to the outside of the thrust sleeve and is used for pre-pressing a workpiece, one end of the thrust spring is fixed on the bottom face of the upper end of the thrust sleeve, and the lower end of the thrust spring is fixedly connected with the upper end face of the thrust pin.

Further, be fixed with the connecting rod on the preceding terminal surface of last compact heap, the one end of connecting rod is fixed on last compact heap, the other end orientation of connecting rod is kept away from the direction of piston rod and is extended, this end of connecting rod is fixed with precompaction mechanism II, precompaction mechanism II includes the prefastening coupling piece, supplementary depression bar and pretension spring, the lateral wall of prefastening coupling piece is fixed on the connecting rod, the lower extreme opening of prefastening coupling piece, the upper end of supplementary depression bar stretches into the prefastening coupling piece and passes through spacing piece spacing after the up end of prefastening coupling piece, supplementary depression bar can reciprocate, the cover has the pretension spring on the inside supplementary depression bar of prefastening coupling piece, be provided with the spacing step of pretension spring on the supplementary depression bar.

Further, the bridge plate is fixedly connected with the equipment workbench, hydraulic oil ways communicated with the hydraulic cylinders are distributed in the bridge plate, and oil inlet holes and oil outlet holes communicated with the hydraulic oil ways are formed in the side face of the bridge plate.

Further, a rotation preventing rod is fixed on the bridge plate behind the hinge pressing plate and fixedly connected with the hinge pressing plate, and the rotation preventing rod is used for ensuring that the hinge pressing plate can only move up and down when pressing the workpiece.

The utility model has the beneficial effects that:

1. the utility model has the advantages of compact integral structure, 4 workpieces clamped at one time, short clamping stroke and high reliability;

2. the utility model uses the double V-shaped blocks to quickly position, adopts a vertical and axial bidirectional auxiliary positioning mode, has simple clamping and high reliability;

3. the utility model is applicable to the processing of serial parts by multi-spindle processing center equipment, and has strong universality;

4. the hydraulic clamping is adopted, so that the clamping efficiency of parts is improved by 3 times compared with that of a common manual screw clamp;

5. the clamping method is simple and reliable, and is suitable for automatic production lines such as manipulators.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram showing the structure at the coupling block;

FIG. 3 is a front view of the present utility model;

FIG. 4 is a cross-sectional view taken at C-C of FIG. 3;

FIG. 5 is a cross-sectional view taken at D-D in FIG. 3;

fig. 6 is a schematic view of workpiece positioning.

Reference numerals:

1. a hydraulic cylinder; 2. a bridge plate; 3. a piston rod; 4. a hinged pressure plate; 5. a coupling block; 6. a positioning block; 7. a workpiece; 8. an auxiliary compression bar; 9. an anti-rotation rod; 10. a lateral positioning key; 11. a longitudinal positioning key; 12. a T-shaped screw; 13. a pre-tightening spring; 14. pre-tightening the connecting block; 15. a thrust pin; 16. a thrust spring; 17. a thrust sleeve; 18. an upper compaction block; m1, an oil inlet hole; m2, an oil outlet hole; a1, positioning a first V-shaped positioning point; a2, a V-shaped positioning point II; a3, axially positioning points; a4, positioning points in the circumferential direction.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-6, a multi-station hydraulic fixture comprises a pair of hydraulic cylinders 1, wherein the hydraulic cylinders 1 are symmetrically fixed on the lower end face of a bridge plate 2, a piston rod 3 of each hydraulic cylinder 1 penetrates through the bridge plate 2 to extend upwards, a hinge pressing plate 4 is linked to the top end of each piston rod 3 in a hinge mode, the upper end of each piston rod 3 is connected with the middle part of each hinge pressing plate 4, a connecting block 5 is fixed on the bridge plate 2 on two sides of each piston rod 3, the upper end of each connecting block 5 is connected with a positioning block 6, a workpiece is placed above each positioning block 6, each positioning block 6 positions the corresponding workpiece 7, and each hinge pressing plate 4 can press the corresponding workpiece 7 on each positioning block 6 under the driving of a piston.

The bridge plate 2 is fixedly connected with the equipment workbench, hydraulic oil ways communicated with the hydraulic cylinders 1 are distributed in the bridge plate 2, and oil inlet holes M1 and oil outlet holes M2 communicated with the hydraulic oil ways are formed in the side face of the bridge plate 2.

The connecting block 5 is fixed on the bridge plate 2 through a screw, a cross-shaped positioning groove is formed in the upper end face of the rear part of the connecting block 5, a longitudinal positioning key 11 is fixed in a front-back groove, a T-shaped screw 12 is fixed in the front end of the longitudinal positioning key 11, transverse positioning keys 10 are fixed in transverse cross-shaped positioning grooves on two sides of the longitudinal positioning key 11, a T-shaped groove matched with the T-shaped screw 12 is formed in the bottom end of the positioning block 6, and the T-shaped groove of the positioning block 6 horizontally penetrates through the lower end face of the positioning block 6 in the front-back direction. The rear end face of the positioning block 6 is abutted against the transverse positioning key 10, and the longitudinal positioning key 11 is embedded into a T-shaped groove at the bottom of the positioning block 6 to play roles of limiting in the left-right direction and preventing rotation.

The lower end face of the hinge pressing plate 4 at the position above the positioning block 6 matched with the workpiece 7 is connected with an upper pressing block 18 through an inverted T-shaped block, and the upper end face of the upper pressing block 18 is provided with a T-shaped through groove matched with the T-shaped block. The lower end face of the upper compression block 18 is provided with a counter bore, a thrust sleeve 17 is assembled in the counter bore, the opening of the thrust sleeve 17 faces downwards, a thrust spring 16 is assembled in the thrust sleeve 17, the upper end of a thrust pin 15 is positioned in the thrust sleeve 17, and the lower end of the thrust pin 15 extends to the outside of the thrust sleeve 17 for precompaction with a workpiece 7. One end of the thrust spring 16 is fixed on the bottom surface of the upper end of the thrust sleeve 17, and the lower end of the thrust spring 16 is fixedly connected with the upper end surface of the thrust pin 15.

The front end face of the upper compression block 18 is fixedly provided with a connecting rod, one end of the connecting rod is fixed on the upper compression block 18, the other end of the connecting rod extends towards the direction away from the piston rod 3, the free end of the connecting rod is fixedly provided with a pre-tightening connecting block 14, the lower end of the pre-tightening connecting block 14 is opened, the upper end of the auxiliary compression rod 8 stretches into the pre-tightening connecting block 14 and passes through the upper end face of the pre-tightening connecting block 14 to be limited by a nut, the auxiliary compression rod 8 can move up and down, the pre-tightening spring 13 is sleeved on the auxiliary compression rod 8 in the pre-tightening connecting block 14, and the auxiliary compression rod 8 is provided with a limiting step of the pre-tightening spring 13. The auxiliary presser bar 8 is used for pre-pressing the work piece 7 in the vertical direction.

The anti-rotation rod 9 is fixed on the bridge plate 2 behind the hinge pressing plate 4, the anti-rotation rod 9 is fixedly connected with the hinge pressing plate 4, and the anti-rotation rod 9 can only move up and down and can not rotate when the hinge pressing plate 4 is used for pressing a workpiece.

The front and rear of the positioning block 6 are respectively V-shaped positioning blocks 6 designed according to the workpiece 7, and the positioning points are respectively a V-shaped positioning point A1, a V-shaped positioning point II A2, an axial positioning point A3 and a circumferential positioning point A4 as shown in the figure.

The working principle of the utility model is as follows:

the workpiece 7 is placed on the positioning block 6, the workpiece 7 is initially positioned by the V-shaped positioning block 6 on the positioning block 6, the workpiece 7 is pre-compressed by the auxiliary pressing rod 8 and the thrust pin 15, the hydraulic cylinder 1 drives the piston to work, and the work drives the hinge pressing plate 4 to press the workpiece 7 downwards.

According to the double-station design, two parts are clamped once at each station, and the clamping efficiency is high.

The utility model adopts a double V-shaped positioning mode, has high positioning precision and simple clamping mode of the workpiece 7. The sub-clamp is quickly positioned by adopting the T-shaped key, and has high installation and debugging efficiency. The utility model has the auxiliary compression bar 8 which can elastically compress, realizes the precompaction of parts in the vertical direction, automatically eliminates the positioning gap and improves the positioning precision. The utility model has the anti-rotation rod 9 to realize the guiding and anti-rotation of the hinge pressing plate 4, and improves the stability of the clamping process. The utility model is provided with the axial thrust pin 15 and the thrust spring 16, can realize the precompaction of parts in the axial direction, automatically eliminate the positioning gap and improve the positioning precision. The hydraulic oil way is integrated in the bridge plate 2, and has no additional connecting oil pipe, high reliability and small occupied space.

The fixture is mainly characterized in that the structural characteristics of a brake master cylinder are skillfully utilized, the dual V-shaped blocks, the axial end face and the circumferential end face are adopted to realize quick and accurate positioning, the vertical and axial pre-compression device is adopted, the clamping stroke of the upper pressing plate of the fixture is short, the clamping is quick and reliable, the efficiency is high, the fixture has the characteristics of high positioning precision and quick and reliable clamping, and the fixture is suitable for processing similar structural series parts, and is suitable for being used in automatic production lines such as manipulators.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. A multistation hydraulic clamp is characterized in that: the hydraulic cylinder (1) is symmetrically fixed on the lower end face of the bridge plate (2), a piston rod (3) of the hydraulic cylinder (1) penetrates through the bridge plate (2) to extend upwards, a hinge pressing plate (4) is connected to the top end of the piston rod (3) in a hinge mode, a connecting block (5) is fixed on the bridge plate (2) on two sides of the piston rod (3), a positioning block (6) is connected to the upper end of the connecting block (5), a workpiece is placed above the positioning block (6), the positioning block (6) is used for positioning the workpiece (7), the hinge pressing plate (4) can be used for pressing the workpiece (7) on the positioning block (6) under the driving of the piston, an upper pressing block (18) is arranged at the position corresponding to the workpiece (7), and a first pre-pressing mechanism for axially pre-pressing the workpiece (7) is arranged on the lower end face of the upper pressing block (18), and a second pre-pressing mechanism for vertically pre-pressing the workpiece (7) is also connected to the side of the upper pressing block (18).

2. A multi-station hydraulic clamp according to claim 1, wherein: the T-shaped screw (12) is fixed on the connecting block (5), the T-shaped groove matched with the T-shaped screw (12) is formed in the lower end face of the positioning block (6), and the T-shaped groove of the positioning block (6) horizontally penetrates through the bottom face of the positioning block (6) in the front-back direction.

3. A multi-station hydraulic clamp according to claim 2, wherein: the upper end face of the rear part of the connecting block (5) is provided with a cross-shaped positioning groove, longitudinal positioning keys (11) are fixed in grooves in the front and rear directions of the cross-shaped positioning groove, T-shaped screws (12) are fixed at the front ends of the longitudinal positioning keys (11), transverse positioning keys (10) are fixed in transverse cross-shaped positioning grooves on two sides of the longitudinal positioning keys (11), the rear end face of the positioning block (6) abuts against the transverse positioning keys (10), and the longitudinal positioning keys (11) are embedded into T-shaped grooves at the bottom of the positioning block (6).

4. A multi-station hydraulic clamp according to claim 1, wherein: the lower end face of the hinge pressing plate (4) is connected with an upper pressing block (18) through an inverted T-shaped block, a T-shaped through groove matched with the T-shaped block is formed in the upper end face of the upper pressing block (18), the pre-pressing mechanism I comprises a thrust sleeve (17), a thrust spring (16) and a thrust pin (15), a counter bore is formed in the lower end face of the upper pressing block (18), the thrust sleeve (17) is located in the counter bore, an opening of the thrust sleeve (17) faces downwards, the thrust spring (16) is located in the thrust sleeve (17), the upper end of the thrust pin (15) is located in the thrust sleeve (17), the lower end of the thrust pin (15) extends to the outside of the thrust sleeve (17) to be used for pre-pressing with a workpiece (7), one end of the thrust spring (16) is fixed on the bottom face of the upper end of the thrust sleeve (17), and the lower end of the thrust spring (16) is fixedly connected with the upper end face of the thrust pin (15).

5. A multi-station hydraulic clamp according to claim 1, wherein: the connecting rod is fixed on the front end face of the upper compression block (18), one end of the connecting rod is fixed on the upper compression block (18), the other end of the connecting rod extends towards the direction away from the piston rod (3), the second pre-compression mechanism is fixed on the end of the connecting rod and comprises a pre-compression connecting block (14), an auxiliary compression rod (8) and a pre-compression spring (13), the side wall of the pre-compression connecting block (14) is fixed on the connecting rod, the lower end of the pre-compression connecting block (14) is opened, the upper end of the auxiliary compression rod (8) stretches into the pre-compression connecting block (14) and passes through a limiting piece to limit the upper end face of the pre-compression connecting block (14), the auxiliary compression rod (8) can move up and down, the pre-compression spring (13) is sleeved on the auxiliary compression rod (8) in the pre-compression connecting block (14), and a limiting step of the pre-compression spring (13) is arranged on the auxiliary compression rod (8).

6. A multi-station hydraulic clamp according to claim 1, wherein: the bridge plate (2) is fixedly connected with the equipment workbench, hydraulic oil ways communicated with the hydraulic cylinders (1) are distributed in the bridge plate (2), and oil inlet holes (M1) and oil outlet holes (M2) communicated with the hydraulic oil ways are formed in the side faces of the bridge plate (2).

7. A multi-station hydraulic clamp according to claim 1, wherein: the anti-rotation rod (9) is fixed on the bridge plate (2) at the rear of the hinge pressing plate (4), the anti-rotation rod (9) is fixedly connected with the hinge pressing plate (4), and the anti-rotation rod (9) can only move up and down when the hinge pressing plate (4) is used for pressing a workpiece.