CN217833388U - Clamp - Google Patents

Abstract

The utility model discloses an anchor clamps, include: the outer sleeve is at least partially or integrally nested in the elastic clamping block in the outer sleeve, a hole for clamping a workpiece is formed in the elastic clamping block, and the outer sleeve is connected with a locking nut through threads and can move along the axial direction of the outer sleeve when rotating; wherein: a limiting structure is arranged in the outer sleeve; when the locking nut moves towards the direction close to the limiting structure, the elastic clamping block is extruded by the limiting structure and the locking nut, the elastic clamping block can stretch along the radial direction to generate elastic deformation, and the hole in the elastic clamping block is reduced to clamp the workpiece. Compared with the prior art, the utility model discloses an anchor clamps have harmless centre gripping, convenient operation, a great deal of advantages such as easily adjusting.

Description

Clamp

Technical Field

The utility model belongs to work piece clamping device field specifically is an anchor clamps.

Background

In most processes of machining and testing a workpiece, the workpiece needs to be held by a jig. Due to the different structures of various workpieces, the clamp is required to be matched with the workpieces.

Fig. 1 shows a workpiece 1 which is hollow in its interior, is provided at its upper end with an opening 2 communicating with its interior and which requires the injection of material into its interior. The existing clamp generally needs to use a structure similar to a rigid clamp, so that a mark is easily left on a workpiece, and the clamping force is not easy to master. Therefore, a new type of clamp is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide an anchor clamps adopts elastomeric element to realize the centre gripping.

The utility model provides a technical scheme that its technical problem adopted is:

a clamp, comprising:

an outer sleeve is arranged on the outer sleeve,

the elastic clamping block is at least partially or integrally nested in the outer sleeve, is provided with a hole for clamping a workpiece, is connected with the outer sleeve through a locking nut in a threaded manner, and can move along the axial direction of the outer sleeve when rotating; wherein:

a limiting structure is arranged in the outer sleeve;

when the locking nut moves towards the direction close to the limiting structure, the elastic clamping block is extruded by the limiting structure and the locking nut, the elastic clamping block can stretch along the radial direction to generate elastic deformation, and the hole in the elastic clamping block is reduced to clamp the workpiece.

Compared with the prior art, the beneficial effects of the utility model mainly include: the elastic clamping blocks are used for clamping the workpiece, the workpiece is not easy to scratch, and lossless clamping is realized. The outer sleeve and the locking nut are matched through threads to realize fastening, the clamping operation is very convenient, and the operation steps only comprise inserting a workpiece and rotating the locking nut. In addition, the deformation degree and the clamping degree of the elastic clamping block can be adjusted by controlling the engineering of the locking nut moving along the axial direction of the outer sleeve, and the clamping degree is easier to control by controlling the rotating angle (the number of turns) of the locking nut. The clamping device can also adapt to workpieces with different specifications in a certain range by utilizing elastic deformation, so that the clamping device has certain flexibility and adaptability.

Optionally, the clamp further comprises a horizontal pushing bearing, the middle of the horizontal pushing bearing is penetrated to allow the workpiece to pass through, wherein the horizontal pushing bearing is coupled between the lock nut and the elastic clamping block to allow the transmission of the force of the lock nut against the elastic clamping block, and simultaneously can block the transmission of the torque between the lock nut and the elastic clamping block.

Optionally, one end of the locking nut is connected with a cover plate, and the cover plate is provided with a through hole to allow the workpiece to pass through. The through hole in the cover plate is slightly larger than the outer diameter of the workpiece, and thus, facilitates easier alignment and insertion of the workpiece relative to the fully open lower portion.

Alternatively, one end of the flat push bearing can be abutted against the cover plate, so that a more compact nested structure is formed.

Optionally, the fixture further comprises a bearing pad, a middle part of the bearing pad is penetrated to allow the workpiece to pass through, wherein one side end surface of the bearing pad can be abutted against the elastic clamping block, and the other side end of the elastic clamping block can be abutted against one end of the horizontal pushing bearing.

Optionally, the bearing pad is provided with a tail, wherein:

the tail part is nested in the middle of the horizontal push bearing; alternatively, the first and second electrodes may be,

the tail part penetrates through the through holes in the middle of the horizontal pushing bearing and on the cover plate in sequence and is nested. By the arrangement, the coaxiality can be improved, and the influence on the rotation stability caused by the radial sliding of the thrust bearing is avoided.

Optionally, the end of the bearing cushion block opposite to the elastic clamping block is at least partially nested in the outer sleeve to improve the stability of structural fit, and the structure is compact.

Drawings

FIG. 1 is a schematic cross-sectional view of a workpiece.

Fig. 2 is an exploded view of an embodiment of a clamp.

FIG. 3 is a cross-sectional view of an outer sleeve according to an embodiment of the present invention.

FIG. 4 is a sectional assembly view showing a holding structure of the jig according to the embodiment.

Fig. 5 is a sectional assembly view of the discharging device according to an embodiment.

Figure 6 is a schematic cross-sectional view of the aggregate casing of figure 5.

Fig. 7 is an exploded view of a discharging device according to another embodiment.

FIG. 8 is an exploded cross-sectional view of the transfer sleeve and the kingpin according to an exemplary embodiment.

Fig. 9 is a schematic sectional view illustrating the lower side of the material storage space in the transfer sleeve being blocked by the loose pin in the embodiment.

FIG. 10 is a schematic sectional view showing the assembly of the movable pin, the transfer sleeve, the outer sleeve and the capping mechanism in the embodiment.

Fig. 11 is a schematic front view of the capping mechanism in the embodiment.

FIG. 12 is a cross-sectional view of an embodiment of a multi-function clip.

Description of the figure numbers:

1. workpiece, 2. Opening.

10. The device comprises an outer sleeve, 101, a first sleeve part, 102, a second sleeve part, 103, a third sleeve part, 104, a fourth sleeve part, 11, threads, 12, a first connecting plate, 13, a second connecting plate, 14, a feeding air pipe, 15, a first air pipe and 16, and a second air pipe.

20. Elastic clamping block, 21, through hole in the middle of elastic clamping block.

30. The horizontal push bearing 31, the bearing cushion block 32, the through hole in the middle of the bearing cushion block.

40. The locking nut, 41, a cover plate, 42, a through hole on the cover plate, 43 and a handle.

50. Aggregate casing, 51, first channel, 52, second channel, 53, third channel.

60. A transfer sleeve 61, a material storage space 62 and a conduit 62.

70. The loose pin, 71, the notch, 72, the opening on the end face of the loose pin.

80. The sealing mechanism comprises a sealing cover mechanism 81, a pressing sleeve 82, a pressing cover 83, a first sealing ring 84, a second sealing ring 85, a pressing rod 86 and a spring.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Referring to fig. 2, the clip of the present embodiment mainly includes a hollow outer tube 10, an elastic clamping block 20, and a lock nut 40. Preferably, a horizontal push bearing 30 is also provided in the fixture.

Referring to fig. 3, the lower end of the outer sleeve 10 is a first sleeve part 101 with an inner diameter D1; on the upper side of the first sleeve part 101 is a second sleeve part 102 connected thereto, the inner diameter of which is D2. The inner diameter D1 of the first sleeve pipe part 101 is larger than the inner diameter D2 of the second sleeve pipe part 101, so that a limiting step is formed at the position where the inner walls of the first sleeve pipe part and the second sleeve pipe part are connected, and when the limiting step abuts against other components, the other components can be limited to move upwards.

The upper portion of the elastic clamping block 20 or the whole elastic clamping block is sleeved in the first sleeve pipe portion 101, and a through hole 21 is formed in the middle of the elastic clamping block 20.

The outer side of the first sleeve part 101 is provided with threads, the locking nut 40 is provided with internal threads, the locking nut and the locking nut are connected in a threaded fit mode, and the position of the locking nut 40 in the axial direction of the first sleeve part 101 can be adjusted.

The lower end of the lock nut 40 is connected with a cover plate 41, and the middle part of the cover plate 41 is provided with a through hole 42. The horizontal push bearing 30 is disposed between the cover plate 41 and the elastic clamping block 20.

When the elastic clamping block is used, the horizontal pushing bearing 30 is clamped between the cover plate 41 and the elastic clamping block 20, the locking nut 40 is rotated to move upwards or downwards along the axial direction of the first sleeve part 101, and then the elastic clamping block 20 is squeezed or loosened along the axial direction. The flat push bearing 30 functions to block the transmission of torque from the lock nut 40 to the resilient clamp block 20.

The middle part of the horizontal push bearing 30 is vertically through. When loading the workpiece 1, the end provided with the opening 2 is passed through the through hole 42 of the cover plate 41, the middle part of the horizontal push bearing 30 and the through hole 21 of the elastic clamping block 20 in sequence. Subsequently, the locking nut 40 is rotated to move upwards, so as to press the elastic clamping block 20 to be compressed and deformed, and at this time, under the limiting action of the limiting step between the first sleeve part 101 and the second sleeve part 102, the elastic clamping block 20 is forced to be pressed and deformed inwards along the radial direction under the condition that the elastic clamping block is pressed upwards, so as to clamp the upper part of the workpiece 1, so as to realize clamping.

When the workpiece 1 is unloaded, the lock nut 40 is rotated to move downward in the clamped state, and the elastic clamp blocks 20 are restored and further released outward from the upper portion of the workpiece 1, so that the workpiece can be removed.

In other embodiments, the clamp is further provided with a bearing pad 31 which is padded on the lower side of the elastic clamping block 20 and between the elastic clamping block 20 and the horizontal pushing bearing 30.

Preferably, the outer diameter of the tail portion of the bearing pad 31 is smaller, and substantially matches or slightly smaller than the inner diameter of the through hole 42 of the cover plate 41.

When assembled, as shown in fig. 4, the tail of the bearing spacer 31 passes through the horizontal push bearing 30 and can extend into the through hole 42 of the cover plate 41, and the tail of the bearing spacer 31 and the through hole 42 of the cover plate 41 can slide relatively, so that the coaxial assembly can be maintained, the rotation process is stable and reliable, and the horizontal push bearing 30 is prevented from moving along the radial direction.

Preferably, in this example, the length of the first sleeve portion 101 is longer than the height of the elastic clamping block 20, so that when the two are assembled together, the elastic clamping block 20 is wholly nested in the first sleeve portion 101, and the head portion of the bearing pad 31 at least partially extends into the first sleeve portion 101. The width of the head of the bearing pad 31 matches or is slightly smaller than the inner diameter of the first sleeve part 101, and the two parts can be matched in a relatively sliding way.

Preferably, in a state that the elastic clamping block 20 does not clamp the workpiece 1, the bearing pad 31 or the horizontal pushing bearing 30 on the lower side of the elastic clamping block also keeps in contact with the elastic clamping block 20 or slightly bears the force, so that the elastic clamping block 20 is prevented from being loosened due to excessive downward movement, the clamping operation is facilitated again, and the stability is improved.

Further, for the convenience of operation, a handle 43 is fixedly connected to the lock nut 40.

Referring to fig. 2, the emptying device of the present embodiment includes the above-mentioned outer sleeve 10 and an aggregate sleeve 50. The lower part of the outer sleeve 10 is connected with a clamping mechanism, which can be composed of the above-mentioned elastic clamping block 20, the horizontal pushing bearing 30, the lock nut 40, and the optional bearing cushion block 31, and can be further modified on the basis of the above, or other structures in the prior art. The present embodiment does not specifically limit the structure of the chucking mechanism.

As an alternative way: the upper part of the outer sleeve 10 may be closed; it is also possible to provide an open structure at the upper part of the outer sleeve 10, and further add a cover mechanism 80 to close the opening.

As shown in fig. 3, a third casing pipe portion 103 is connected to an upper side of the second casing pipe portion 102 of the outer casing 10. The inner diameter of the third sleeve pipe part 103 is D3, wherein the inner diameter D2 of the second sleeve pipe part 102 is larger than the inner diameter D3 of the third sleeve pipe part 103, so that a limiting step is formed at the position where the inner walls of the third sleeve pipe part and the second sleeve pipe part are connected, and when the limiting step abuts against other components, the other components can be limited to move upwards.

Referring to fig. 5, the aggregate casing 50 is disposed within the second casing portion 102 of the outer casing 10, and the outer diameter of the aggregate casing 50 substantially matches or is interstitially joinable with the inner diameter of the second casing portion 102. The aggregate casing 50 may be threaded upwardly from the lower portion of the outer casing 10 to nest within the second casing portion 102.

As shown in connection with fig. 6, the aggregate casing 50 is hollow in the middle to form a channel, wherein: from the middle of the upper end surface of the aggregate casing 50 to the middle of the lower end surface thereof, a first channel 51 of an inverted cone shape and a second channel 52 of a cone shape are provided in communication with each other. Optionally, a third channel 53 is also provided.

As shown, the first channel 51 in the upper portion of the collection sleeve 50 is relatively large in size, and preferably has an open edge that abuts against the lower edge of the third sleeve portion 103 of the collection sleeve 50 to receive the material passing downwardly from the third sleeve portion 103. Or, alternatively, in other embodiments, the opening width on the upper side of the first passage 51 is larger than the inner diameter at the lower edge of the third sleeve part 103, and can also receive the material passing downward from the third sleeve part 103.

The second passage 52 in the collection sleeve 50 is relatively small in size and its inclined conical surface is adapted to fit the upper opening of the workpiece 1 so that material entering the first passage 51 passes through the second passage 52 into the workpiece 1.

As shown in fig. 2, a first vent pipe 15, a second vent pipe 16 and a feed gas pipe 14 are further connected to the outer tube 10 and connected to the inner space of the outer tube 10.

The number of the vent pipes can be increased or decreased according to needs, and the vent pipes are mainly used for introducing gas or sucking out gas or vacuumizing the workpiece 1.

The gas inlet pipe 14 is used for connecting a gas material source and injecting gas materials into the workpiece 1.

The opening at the upper end of the workpiece 1 is attached to the inner wall of the second channel 52 of the aggregate casing 50 for contact sealing, and the upper end surface of the aggregate casing 50 abuts against the step at the joint of the second casing part 102 and the third casing part 103 for contact sealing.

By combining the jigs and the emptying devices of the above embodiments, and sharing one outer sleeve 10, a jig with an emptying function can be obtained.

Further, in the aspect of the emptying function, the elastic clamping block 20 is arranged at the lower part of the outer sleeve 10. The elastic clamping blocks 20 are tightly attached to the inner wall of the outer sleeve 10, including but not limited to the position of the connection with the first sleeve part 101 and the second sleeve part 101, to perform a further sealing function. The elastic clamping blocks 20 are clamped with the workpiece 1 and also play a role in further sealing. Therefore, the sealing effect of the end, communicated to the workpiece 1, of the material inlet channel is improved.

In the above embodiments, the material of the elastic clamping block 20 can be selected according to the use environment. And under the high-temperature working condition of hundreds of degrees centigrade, the high-temperature resistant rubber is preferably selected.

As shown in fig. 7, the emptying device of this embodiment includes the outer sleeve 10, the transfer sleeve 60, and the movable pin 70 to facilitate the filling of liquid or solid materials in other applications. Preferably, the upper portion of the outer sleeve 10 is further provided with a capping mechanism 80.

The lower part of the outer sleeve 10 is connected with a clamping mechanism which can be composed of the elastic clamping block 20, the horizontal pushing bearing 30, the locking nut 40 and the optional bearing cushion block 31, and can be further deformed on the basis of the clamping mechanism, or other structures in the prior art. The present embodiment does not specifically limit the structure of the chucking mechanism.

As shown in fig. 8, the transfer sleeve 60 has a larger upper size and forms a hopper-shaped material storage space 61; the transfer sleeve 60 is small in size at its lower portion and forms an elongated conduit 62, and the stock space 61 communicates downwardly to the conduit 62.

The loose pin 70 can move downward in the direction indicated by the arrow B in the drawing or upward in the direction indicated by the arrow a in the drawing. Referring to fig. 9, when charging, the pin 70 drops into the stock space 61 at the upper part of the transfer sleeve 60 and blocks the lower side of the stock space 61, cutting off the communication between the stock space 61 and the conduit 62 at the lower side thereof. At this time, the material may be injected into the material storage space 61. Subsequently, the movable pin 70 is lifted upwards, the lower side of the material storage space 61 is unblocked, and the material can rapidly flow downwards into the conduit 62 and can be injected into the workpiece 1 through other passages communicating with the conduit.

Preferably, a notch 71 is formed on a side wall of a central portion of the loose pin 70, and the notch 71 is connected to an opening 72 formed on an upper end surface of the loose pin 70. After the material is injected from the opening 72, the material flows out from the notch 71 and is retained in the material storage space 61.

In some embodiments, the conduit 62 is aligned with, or abuts, the opening 2 of the workpiece 1, or the conduit 62 extends into the opening 2.

In other applications, where several hundred degrees celsius are used, the conduit 62 may not be in direct fluid communication with the opening 2, but may instead be diffused into the workpiece 1 by vaporization.

It is further preferred that the lower side wall of the notch 72 is a downwardly extending inclined wall 73 to facilitate the flow of the material out completely and prevent the accumulation of the material in the loose pin 70.

The loose pin 70 may be moved up and down in various ways. For example, a pull cord (not shown) may be connected, which in turn is coupled to a drive device to drive the movement of the loose pin 70.

Alternatively, the loose pin 70 is preferably made of a magnetic material, such as a metal or alloy of magnets, iron, or the like. The movable pin 70 is attracted by magnetic attraction and then moved upward, or the magnetic attraction is released and then moved downward. Preferably, an electromagnet (not shown) may be provided on an external device or apparatus, which is located relatively close to the upper space of the movable pin 70.

As described above, the loose pin 70 is entirely made of a magnetic material, or a part thereof is made of a magnetic material, and preferably, at least an upper part of the loose pin 70 is made of a magnetic material.

Preferably, the capping mechanism 80 mainly includes a pressing sleeve 81 and a pressing cover 82.

Referring to fig. 10, the outer side of the upper end of the outer sleeve 10 is provided with a first connecting plate 12. The middle of the pressing sleeve 81 is also hollow, and is communicated to the inside of the outer sleeve 10. The pressing sleeve 81 and the first connecting plate 12 are fixed together by screws, and a first sealing ring 83 is arranged between the pressing sleeve and the first connecting plate to enable the pressing sleeve and the first connecting plate to be connected in a sealing mode.

Preferably, the inner diameter of the press sleeve 81 is slightly larger than the width of the loose pin 70 to allow at least the upper portion of the loose pin 70 to penetrate into the press sleeve 81. Wherein, the upper end of the loose pin 70 can also abut against the inner wall of the pressing sleeve 81, and the blocking failure of the loose pin 70 to the lower side of the material storage space 61 is prevented.

The transit sleeve 60 is sleeved in the outer sleeve 10.

A fourth sleeve portion 104 is connected to an upper side of the third sleeve portion 103 of the outer sleeve 10. The inner diameter of the fourth sleeve part 104 is D4, wherein the inner diameter D4 of the fourth sleeve part 104 is larger than the inner diameter D3 of the third sleeve part 103, and a limit step is formed at the position where the inner walls of the fourth sleeve part and the third sleeve part are connected. Thus, the first connection plate 12 is connected to the outside of the upper end of the fourth sleeve portion 104.

Preferably, the upper portion of the transfer sleeve 60 is larger and nests within the fourth sleeve portion 104 of the outer sleeve 10; the lower portion of the transfer sleeve 60 is smaller and fits within the third sleeve portion 103 of the outer sleeve 10. And the limit step at the joint of the fourth sleeve part 104 and the third sleeve part 103 can be abutted against the lower end surface of the upper part of the transfer sleeve 60, so as to support the transfer sleeve 60.

The pressing cover 82 can be put on the pressing sleeve 81 to close the upper opening thereof. Further, the open upper outer edge of the pressing sleeve 81 is provided with a second sealing ring 84, and when the pressing cover 82 is closed, the second sealing ring 84 is clamped between the second sealing ring and the pressing cover.

Further, a pressure lever 85 is further disposed on the cover sealing mechanism 80, and a middle portion of the pressure lever 85 is rotatably coupled to the pressing sleeve 81. One end of the pressing rod 85 is connected with the gland 82, and can also be rotatably connected with the gland 82, and the other end of the pressing rod 85 is operated, so that the gland 82 can be opened or closed.

Referring to fig. 11, further, a spring 86 is provided on the capping mechanism 80. In this embodiment, there are 2 springs 86 respectively located at the front side and the rear side of the pressing sleeve 81, wherein one end of the spring 86 is fixed with the pressing cover 82, the other end of the spring 86 is fixed with the pressing sleeve 81, and when the pressing cover 82 is closed, the spring 86 is in a stretching state, and the restoring force generated by the spring is applied to the pressing cover 82, so that the pressing cover 82 is pressed against the pressing sleeve 81 and is kept tightly closed.

The above embodiments can also be combined with each other to form a multifunctional clamp.

Referring to fig. 12, the multifunctional clip of the present embodiment includes at least two of the following structures:

the clamping structure mainly comprises the outer sleeve 10, the elastic clamping block 20, the horizontal pushing bearing 30 and the locking nut 40;

the discharging structure mainly comprises the outer sleeve 10 and the aggregate sleeve 50;

another discharging structure mainly composed of the outer sleeve 10, the transit sleeve 60 and the loose pin 70; and the number of the first and second groups,

the capping mechanism 80. In addition, other components further provided in the above embodiments may be added.

As shown in the figure, the workpiece 1 penetrates the elastic clamp block 20 from below and is clamped by it. The top of the workpiece 1 may further extend into the collection sleeve 50 and abut against the inner wall of the collection sleeve 50 to receive the material.

In the above embodiment, the elastic clamping blocks 20 can be used for clamping the workpiece 1, and the workpiece 1 is not easily scratched, so that lossless clamping is realized.

The fastening is achieved by means of the threaded fit between the outer sleeve 10 and the lock nut 40, the clamping operation is very convenient, and the operation steps only include inserting or removing the workpiece 1 and rotating the lock nut 40. When the workpiece 1 is loaded, the locking nut 40 is rotated to move upwards, and the rotating angle corresponds to the distance of the upward movement, so that the deformation degree of the elastic clamping block 20 can be influenced, and the clamping degree can be adjusted. When the workpiece 1 is unloaded, the workpiece 1 can be taken down by rotating the lock nut 40 to move down.

Obviously, it is easy to control the angle (number of turns) of rotation of the lock nut, and the elastic clamping blocks 20 have a certain cushioning effect to prevent the application of excessive pre-tightening force. The clamping device can also adapt to workpieces with different specifications in a certain range by utilizing elastic deformation, so that the clamping device has certain flexibility and adaptability.

The first channel 51 of the aggregate casing 50 facilitates the accumulation of material for injection into the workpiece 1. The workpiece 1 can be fully contacted and sealed with the second channel 52 only by being pushed up tightly, and the operation is simple and convenient. In addition, the inner wall of the funnel-shaped second channel 52 can also be adapted to work pieces 1 of different specifications within a certain range, thereby having certain flexibility and adaptability.

When the material is prepared to be discharged, firstly, the material is injected and kept in the material storage space 61, after the material is completely discharged, the movable pin 70 is lifted to remove the blockage, so that the material is quickly discharged downwards into the guide pipe 62, and then the movable pin 70 is released to be blocked again. Thus, the control of the material injection process is realized through a simple structure.

The embodiments of the present invention are only used for illustration, and do not limit the scope of the claims, and other substantially equivalent alternatives that may be conceived by those skilled in the art are within the scope of the present invention.

Claims (10)

1. A clamp, comprising:

an outer sleeve is arranged on the outer sleeve,

an elastic clamping block which is at least partially or integrally nested in the outer sleeve and is provided with a hole for clamping a workpiece,

the locking nut is in threaded connection with the outer sleeve and can move along the axial direction of the outer sleeve when being rotated; wherein:

a limiting structure is arranged in the outer sleeve;

when the locking nut moves towards the direction close to the limiting structure, the elastic clamping block is extruded by the limiting structure and the locking nut, the elastic clamping block can stretch along the radial direction to generate elastic deformation, and the hole in the elastic clamping block is reduced to clamp the workpiece.

2. The clamp of claim 1, wherein the outer sleeve is provided with an external thread and the lock nut is provided with an internal thread, wherein the lock nut is sleeved on the outer side of the outer sleeve.

3. The clamp of claim 1, further comprising a flat push bearing having a middle portion thereof penetrated to allow the workpiece to pass therethrough, wherein the flat push bearing is coupled between the lock nut and the resilient clamp block to allow transmission of a force of the lock nut against the resilient clamp block while blocking transmission of a torque therebetween.

4. The clamp of claim 3, wherein a cover plate is attached to one end of the lock nut, the cover plate having a through hole to allow the workpiece to pass therethrough.

5. The clamp of claim 4, wherein one end of the flat push bearing is adapted to bear against the cover plate.

6. The clamp of claim 4, further comprising a bearing pad having a central portion thereof penetrated to allow the workpiece to pass therethrough, wherein one side end surface of the bearing pad is adapted to abut against the resilient clamping block, and the other side end of the resilient clamping block is adapted to abut against one end of the flat push bearing.

7. The fixture of claim 6, wherein the bearing pad is provided with a tail, wherein:

the tail part is nested in the middle of the horizontal push bearing; alternatively, the first and second electrodes may be,

the tail part penetrates through the through holes in the middle of the horizontal push bearing and the cover plate in sequence and is nested in the through holes.

8. A clamp according to claim 6 or 7, wherein the end of the bearing pad which abuts the resilient clamp block is at least partially nested within the outer sleeve.

9. The clamp of claim 1, wherein a handle is fixedly attached to the lock nut.

10. The clamp of claim 1, wherein, in a state in which the resilient clamping blocks do not clamp the workpiece: the state of being subjected to the pushing force from the lock nut is maintained, or at least the elastic clamping blocks are kept in contact with the components outside the two side end faces of the elastic clamping blocks.

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