CN216032731U - Clamping device for movable workbench - Google Patents

Abstract

The utility model discloses a clamping device for a movable workbench, and belongs to the technical field of press machine components. The device comprises an upper cover which is fixedly connected below the upper plane of a base; the two ends of the cylinder body are opened, and the top end of the cylinder body is connected with the bottom end of the upper cover; the lower cover is connected to the bottom end of the cylinder body; the shaft body vertically penetrates through the middle part of the closed oil cylinder and is movably connected with the closed oil cylinder, and the top of the shaft body penetrates through the upper plane of the base and extends upwards; the pressing plate is horizontally connected to the top end of the shaft body; the piston ring is arranged in the cylinder body, the inner wall surface of the piston ring is in transmission connection with the side surface of the shaft body, and the outer wall surface of the piston ring is movably connected with the inner wall surface of the cylinder body; and the spring is arranged in the cylinder body, one end surface of the spring is abutted with the bottom of the piston ring, and the other end surface of the spring is abutted with the top of the lower cover. The utility model optimizes the traditional double-cylinder effect into a single-cylinder effect, reduces the equipment cost and the control cost, reduces the failure rate, reduces the impact force of the clamping device on the movable workbench during working, and prolongs the effective service life of each component.

Description

Clamping device for movable workbench

Technical Field

The utility model belongs to the technical field of press machine components, and particularly relates to a clamping device for a movable workbench.

Background

The movable workbench is an important component of the press machine, a die is convenient to replace, production efficiency is improved, the movable workbench is arranged on a base of the press machine, the movable workbench and the base are clamped tightly through the clamping device, it is guaranteed that relative displacement is not generated between the movable workbench and the base when the press machine works, and the clamping device is usually fixed below the upper plane of the base of the press machine.

The existing clamping device generally adopts a double-acting cylinder, a two-position four-way valve is needed to control oil inlet and outlet, when a press machine works, a jacking cylinder and a lower clamping device cylinder are used for discharging oil, oil inlet of an upper cylinder of the clamping device is in a clamping state, when a mould is replaced, a solenoid valve is reversed, the oil outlet of the upper cylinder of the clamping device is used for discharging oil into the lower cylinder, the clamping device is released, meanwhile, the oil inlet of the jacking cylinder is used for jacking a movable working platform, and the movable working platform can move along a guide rail; the existing clamping device needs double cylinders for control, is complex in structure and high in cost, the falling speed of the jacking cylinder cannot be controlled, the falling speed of the workbench is too high, and impact is easy to generate.

Through retrieval, the Chinese patent publication number: CN 101264675A; the publication date is as follows: 2008, 9, 17 months; the two-position four-way solenoid valves are connected in parallel at two ends of an oil cylinder of the clamping device, the other one of the two-position four-way solenoid valves is connected in series on the jacking cylinder, and the two pressure relays are respectively connected in parallel on the two-position four-way solenoid valves. This application is through setting up two-position four-way solenoid valve independent control binding clasp and jack-up jar for press from both sides tight the speed of relaxing and jack-up fall to the workstation and can obtain control, avoid producing the impact, improved equipment life, but the structural change of this application makes equipment cost and control cost further increase.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above problems, the present invention adopts the following technical solutions.

A mobile workbench clamping apparatus comprising:

the upper cover is fixedly connected below the upper plane of the base;

the two ends of the cylinder body are opened, and the top end of the cylinder body is connected with the bottom end of the upper cover;

the lower cover is connected to the bottom end of the cylinder body, the lower cover, the cylinder body and the upper cover form a closed oil cylinder, an oil inlet is formed in the side surface of the upper cover, and the oil inlet is communicated to the inside of the cylinder body;

the shaft body vertically penetrates through the middle part of the closed oil cylinder and is movably connected with the closed oil cylinder, and the top of the shaft body penetrates through the upper plane of the base and extends upwards;

the pressing plate is horizontally connected to the top end of the shaft body;

the piston ring is arranged in the cylinder body, the inner wall surface of the piston ring is in transmission connection with the side surface of the shaft body, and the outer wall surface of the piston ring is movably connected with the inner wall surface of the cylinder body;

and the spring is arranged in the cylinder body, one end surface of the spring is abutted with the bottom of the piston ring, and the other end surface of the spring is abutted with the top of the lower cover.

Further, the shaft body comprises an upper shaft and a lower shaft, and the upper shaft is in threaded connection with the lower shaft.

Furthermore, the shaft body also comprises an anti-loose sleeve which is sleeved on the side surface of the upper shaft;

the middle part of the top surface of the lower shaft is provided with a countersunk head bolt hole, and the bottom of the upper shaft is in threaded connection with a bolt hole part of the countersunk head bolt hole;

the anti-loose sleeve comprises an end part ring and a bulge ring with a bulge formed on the bottom end surface of the end part ring;

the inner wall surface of the convex ring is provided with threads and is in threaded connection with the side surface of the bottom end of the upper shaft, and the convex ring is arranged at the countersunk head part of the countersunk head bolt hole;

the end part ring is provided with a threaded hole, and a fastening screw penetrates through the threaded hole to be abutted against the top surface of the lower shaft.

Furthermore, the side surface of the top of the upper shaft is provided with threads, the middle part of the pressure plate is provided with a matched threaded hole, the pressure plate is in threaded connection with the top of the upper shaft, and the top of the threaded connection part is provided with a seam-riding screw.

Further, still include:

the proximity switch is vertically and downwards arranged on the bottom surface of the lower cover and is in signal connection with the oil inlet valve;

and the induction sheet is horizontally fixed on the bottom surface of the lower shaft.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the clamping device for the movable workbench, the structure that the piston ring is matched with the spring is formed inside the cylinder body, the traditional double-cylinder effect is optimized to be a single-cylinder effect, the equipment cost and the control cost are reduced, the failure rate is reduced, meanwhile, the spring structure can provide buffering when the shaft body drives the pressing plate to descend and clamp, the impact force of the clamping device on the movable workbench during working is reduced, the effective service life of each component is prolonged, and meanwhile, the shaft body and the pressing plate can be released and reset in time during releasing action, so that the action effectiveness is ensured;

(2) according to the clamping device for the movable working table, the shaft body is of a split structure, the length can be adjusted according to different size requirements of the movable working table, and the application range of the clamping device is widened;

(3) the clamping device for the movable workbench is provided with the anti-loose sleeve, so that the situation that the upper shaft and the lower shaft are connected and are loosened can be effectively avoided;

(4) according to the clamping device for the movable workbench, the pressing plate is in threaded connection with the upper shaft, and the joint is provided with the riding bolt, so that the firm connection between the pressing plate and the upper shaft is ensured, and the clamping effect of the clamping device on the movable workbench is further ensured;

(5) the utility model has simple structure, reasonable design and easy manufacture.

Drawings

FIG. 1 is a schematic view of a clamping device for a movable table according to the present invention;

FIG. 2 is a schematic half-sectional view of a clamping apparatus for a movable table according to the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a schematic view of a shaft structure according to the present invention;

FIG. 5 is a schematic view of the relative adjustment of the upper shaft and the lower shaft according to the present invention;

in the figure:

1. an upper cover; 10. an oil inlet; 11. a gland; 12. a bushing;

2. a cylinder body;

3. a lower cover;

4. a shaft body; 40. an upper shaft; 41. a lower shaft; 410. countersunk bolt holes; 42. an anti-loose sleeve; 420. an end ring; 421. a raised ring; 422. fastening screws;

5. pressing a plate;

6. a piston ring; 60. a nut;

7. a spring;

8. a proximity switch;

9. an induction sheet;

1000. a base upper plane;

2000. and (4) moving the workbench.

Detailed Description

The utility model is further described with reference to specific embodiments and the accompanying drawings.

Example 1

The clamping device for a movable workbench of the embodiment comprises:

the upper cover 1 is fixedly connected below the upper plane 1000 of the base;

the two ends of the cylinder body 2 are opened, and the top end of the cylinder body 2 is connected with the bottom end of the upper cover 1;

the lower cover 3 is connected to the bottom end of the cylinder body 2, the lower cover 3, the cylinder body 2 and the upper cover 1 form a closed oil cylinder, an oil inlet 10 is formed in the side face of the upper cover 1, and the oil inlet 10 is communicated to the inside of the cylinder body 2;

the shaft body 4 vertically penetrates through the middle part of the closed oil cylinder and is movably connected with the closed oil cylinder, and the top of the shaft body 4 penetrates through the upper plane 1000 of the base and extends upwards;

the pressing plate 5 is horizontally connected to the top end of the shaft body 4;

the piston ring 6 is arranged in the cylinder body 2, the inner wall surface of the piston ring 6 is in transmission connection with the side surface of the shaft body 4, and the outer wall surface of the piston ring 6 is movably connected with the inner wall surface of the cylinder body 2;

and the spring 7 is arranged in the cylinder body 2, one end surface of the spring 7 is abutted with the bottom of the piston ring 6, and the other end surface of the spring 7 is abutted with the top of the lower cover 3.

In the existing press machine, a clamping device of a movable workbench 2000 adopts a double-acting cylinder to control clamping and releasing, oil inlet and outlet are controlled by a two-position four-way valve, the control cost is high, faults are easy to occur, the clamping and releasing speed is too fast, impact is generated on the structure, the effective service life of each structure is influenced, and aiming at the situation, the movable workbench clamping device is designed in the embodiment.

As shown in fig. 1 and fig. 2, in the clamping device for a mobile workbench according to the embodiment, an upper cover 1 and a lower cover 3 are fixedly connected by bolts, and a cylinder body 2 is located between the upper cover 1 and the lower cover 3, so that the upper cover 1, the cylinder body 2 and the lower cover 3 form a closed cylinder, wherein a threaded hole is formed in the top surface of the upper cover 1, a counter bore is formed in an upper plane 1000 of a base of a press machine, and a bolt penetrates through the counter bore to be screwed with the threaded hole in the top surface of the upper cover 1, so that the clamping device is fixed below the upper plane 1000 of the base; the vertical middle part that runs through closed hydro-cylinder of axis body 4, more specifically say, set up the through-hole of stepping down in the middle part of the 3 terminal surfaces of lower cover, set up the through-hole opening in the middle part of 1 terminal surface of upper cover, axis body 4 passes the through-hole of stepping down of lower cover 3, 1 through-hole opening in 2 middle parts of the cylinder body and the upper cover, plane 1000 position department has seted up the through-hole on the base that axis body 4 corresponds, supply axis body 4 to pass to upwards stretch out, 5 levels of clamp plate are fixed in the 4 top surfaces of axis body, form T type structure from this, with the T type groove cooperation of arranging the mobile workbench 2000 bottom on the plane 1000 on the press base in, the lift through axis body 4 realizes pressing from both sides tightly or relaxing to mobile workbench 2000.

Further, a gland 11 is arranged at the opening of the through hole of the upper cover 1, a through hole is also formed in the middle of the gland 11, and a bushing 12 is arranged at the through hole of the gland 11, as shown in fig. 2, so that stable guidance can be formed for the shaft body 4 extending through the upper cover 1.

Inside cylinder body 2, be equipped with piston ring 6, the 6 internal face swing joint of piston ring lateral wall and 2 internal faces of cylinder body, the 6 inside walls of piston ring are connected with the transmission of 4 sides of axis body, furthermore, the equal hoop of the inside and outside lateral wall of piston ring 6 is seted up the recess, all set up the sealing washer in the recess, ensure the leakproofness of piston ring 6 and 2 junctions of cylinder body from this, and the leakproofness of piston ring 6 and 4 junctions of axis body, thereby make 2 inside parts of cylinder body and 2 inside parts of cylinder body under 6 lower surfaces of piston ring on the piston ring 6 upper surface be two independent spaces.

Further, set up the recess on the side of connecting cylinder body 2 at upper cover 1 and set up the sealing washer, set up the recess and set up the sealing washer in the side of connecting the axis body 4 at upper cover 1, from this, 2 inner spaces of cylinder body between upper cover 1 to piston ring 6 are the enclosure space, communicate to 2 insides of cylinder body through set up oil inlet 10 in upper cover 1 side, piston ring 6 reciprocates when can be effective through control oil pressure, thereby drive axis body 4 up-and-down motion, and then drive axis body 4 top clamp plate 5 and do the action of pressing from both sides tight or relaxing mobile workbench 2000, effectively simplify the effect of current double-cylinder into the single cylinder effect, and the control cost is low, and the fault rate is low.

Further, the spring 7 is arranged inside the cylinder body 2 between the lower end face of the piston ring 6 and the lower cover 3, when the oil inlet 10 is pressurized, the piston ring 6 descends to extrude the spring 7, the spring 7 is compressed, meanwhile, the buffer force is provided for descending of the whole shaft body 4, the pressing plate 5 stably descends, impact is reduced, when the oil inlet 10 is subjected to oil discharging and pressure relief, under the action force recovered by the spring 7, the piston ring 6 can timely ascend and reset, the pressing plate 5 is made to timely rise to loosen the movable workbench 2000, the timely effectiveness of clamping and loosening actions is guaranteed, the impact force in the clamping and loosening process is also effectively reduced, and the effective service life of each component is prolonged.

In this embodiment, the transmission connection of piston ring 6 and axis body 4 is realized through following structure, the lower terminal surface below department sets up nut 60 at piston ring 6, the axis body 4 side of the department that nut 60 corresponds is attacked the screw thread, nut 60 and axis body 4 screw-thread fit spiro union to the extreme low position of restriction piston ring 6 for the axis body 4, be formed with the shaft shoulder at the axis body 4 side of the axis body 4 position department that the up end of piston ring 6 corresponds, restriction piston ring 6 is for the extreme high position of axis body 4, from this with piston ring 6 and axis body 4 fixed connection, make axis body 4 and piston ring 6 keep the synchronous motion state.

Example 2

The clamping device for the movable table of the present embodiment is further improved on the basis of embodiment 1, and the shaft body 4 includes an upper shaft 40 and a lower shaft 41, and the upper shaft 40 is in threaded connection with the lower shaft 41.

The pressing plate 5 on the top end of the shaft body 4 is matched with the T-shaped groove at the bottom of the movable workbench 2000 to clamp the movable workbench 2000 tightly, and for the movable workbench 2000, the situation that the size of the T-shaped groove at the bottom is inconsistent may exist, so that the shaft body 4 of the embodiment is formed by screwing the upper shaft 40 and the lower shaft 41, the screwing degree of threaded connection can be controlled according to the size requirement of the T-shaped groove, and the length of the shaft body 4 is adjusted to adapt to the size of the T-shaped groove at the bottom of the different movable workbench 2000.

Example 3

The clamping device for the movable workbench of the embodiment is further improved on the basis of the embodiment 2, and the shaft body 4 further comprises an anti-loose sleeve 42 which is sleeved on the side surface of the upper shaft 40;

the middle part of the top surface of the lower shaft 41 is provided with a countersunk bolt hole 410, and the bottom of the upper shaft 40 is in threaded connection with a bolt hole part of the countersunk bolt hole 410;

the anti-loose sleeve 42 comprises an end ring 420 and a convex ring 421 which is convexly formed on the bottom end surface of the end ring 420;

the inner wall surface of the convex ring 421 is provided with threads and is in threaded connection with the side surface of the bottom end of the upper shaft 40, and the convex ring 421 is arranged at the countersunk head part of the countersunk head bolt hole 410;

the end ring 420 is provided with a threaded hole, and a fastening screw 422 passes through the threaded hole and abuts against the top surface of the lower shaft 41.

As shown in fig. 4 and 5, the anti-loose sleeve 42 is sleeved on the upper shaft 40, the inner wall surface of the raised ring 421 of the anti-loose sleeve 42 is in threaded fit connection with the threads on the side surface of the bottom end of the upper shaft 40 through threads, so that the anti-loose sleeve 42 and the upper shaft 40 are relatively fixed, the end ring 420 of the anti-loose sleeve 42 is provided with a threaded hole, the fastening screw 422 is in threaded connection with the threaded hole and is abutted against the top surface of the lower shaft 41 through the threaded hole, the fastening screw 422 is abutted against the top surface of the lower shaft 41, so that the anti-loose sleeve 42 and the lower shaft 41 are relatively separated, and the upper shaft 40 and the lower shaft 41 which are fixedly connected with the anti-loose sleeve 42 are connected more firmly without looseness.

Example 4

The clamping device for the movable workbench is further improved on the basis of embodiment 3, threads are formed in the side face of the top of the upper shaft 40, a matched threaded hole is formed in the middle of the pressing plate 5, the pressing plate 5 is in threaded connection with the top of the upper shaft 40, and a seam-riding screw is arranged at the top of the threaded connection part.

As shown in fig. 2, a threaded hole is formed in the top surface of the connection part between the pressure plate 5 and the top of the upper shaft 40, and a seam-riding screw is connected to the threaded hole, so that the connection between the pressure plate 5 and the upper shaft 40 can be effectively prevented from loosening, and the clamping effect on the movable workbench 2000 is ensured.

Example 5

The clamping device for a movable worktable of the embodiment is further improved on the basis of the embodiment 4, and further comprises:

the proximity switch 8 is vertically and downwards arranged on the bottom surface of the lower cover 3, and the proximity switch 8 is in signal connection with the valve of the oil inlet 10;

and a sensing piece 9 horizontally fixed on the bottom surface of the lower shaft 41.

The clamping device clamps or releases the movable workbench 2000 by pressurizing oil injection or pressure relief oil discharge control to the cylinder body 2 through the valve of the oil inlet 10, and the clamping or releasing action is realized by the lifting action of the shaft body 4, therefore, the proximity switch 8 and the induction sheet 9 are arranged in the embodiment, and the proximity switch 8 is triggered according to the moving distance of the lower shaft 41 so as to realize automatic control of valve pressurization or release.

The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.

Claims (5)

1. A mobile workbench clamping apparatus, comprising:

the upper cover is fixedly connected below the upper plane of the base;

the two ends of the cylinder body are opened, and the top end of the cylinder body is connected with the bottom end of the upper cover;

the lower cover is connected to the bottom end of the cylinder body, the lower cover, the cylinder body and the upper cover form a closed oil cylinder, an oil inlet is formed in the side surface of the upper cover, and the oil inlet is communicated to the inside of the cylinder body;

the shaft body vertically penetrates through the middle part of the closed oil cylinder and is movably connected with the closed oil cylinder, and the top of the shaft body penetrates through the upper plane of the base and extends upwards;

the pressing plate is horizontally connected to the top end of the shaft body;

the piston ring is arranged in the cylinder body, the inner wall surface of the piston ring is in transmission connection with the side surface of the shaft body, and the outer wall surface of the piston ring is movably connected with the inner wall surface of the cylinder body;

and the spring is arranged in the cylinder body, one end surface of the spring is abutted with the bottom of the piston ring, and the other end surface of the spring is abutted with the top of the lower cover.

2. A mobile station clamping apparatus as claimed in claim 1, wherein: the shaft body comprises an upper shaft and a lower shaft, and the upper shaft is in threaded connection with the lower shaft.

3. A mobile station clamping apparatus as claimed in claim 2, wherein: the shaft body also comprises an anti-loose sleeve which is sleeved on the side surface of the upper shaft;

the middle part of the top surface of the lower shaft is provided with a countersunk head bolt hole, and the bottom of the upper shaft is in threaded connection with a bolt hole part of the countersunk head bolt hole;

the anti-loose sleeve comprises an end part ring and a bulge ring with a bulge formed on the bottom end surface of the end part ring;

the inner wall surface of the convex ring is provided with threads and is in threaded connection with the side surface of the bottom end of the upper shaft, and the convex ring is arranged at the countersunk head part of the countersunk head bolt hole;

the end part ring is provided with a threaded hole, and a fastening screw penetrates through the threaded hole to be abutted against the top surface of the lower shaft.

4. A mobile station clamping apparatus as claimed in claim 2, wherein: the side surface of the top of the upper shaft is provided with threads, the middle part of the pressure plate is provided with a matched threaded hole, the pressure plate is in threaded connection with the top of the upper shaft, and the top of the threaded connection part is provided with a seam-riding screw.

5. A mobile station clamping apparatus as claimed in claim 2, further comprising:

the proximity switch is vertically and downwards arranged on the bottom surface of the lower cover and is in signal connection with the oil inlet valve;

and the induction sheet is horizontally fixed on the bottom surface of the lower shaft.

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