CN216399409U

CN216399409U - Clamp with constant clamping force

Info

Publication number: CN216399409U
Application number: CN202123298766.7U
Authority: CN
Inventors: 王鹏伟; 杨保成; 李松岭
Original assignee: Sichuan Engineering Technical College
Current assignee: Sichuan Engineering Technical College
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-29
Anticipated expiration: 2031-12-24

Abstract

The application discloses a clamp with constant clamping force, which comprises a bottom plate, a connecting rod mechanism, a clamping part and a buffering part; the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially hinged; the clamping part comprises a stop block, a sliding barrel and a sliding piece; the buffer part comprises a slide block, a connecting rod, a connecting plate and a plurality of springs; the lateral wall of slider has seted up the spout along the slip direction of slider, and the spout communicates with the cavity, is connected with connecting portion on the slider, and the other end of connecting portion is connected with the slide cartridge after passing cavity and spout. This application is through having used the spring to remedy the dimensional error of treating centre gripping material man-hour, the elasticity that the spring produced is under small error influence, and is almost unchangeable, thereby through the effect of spring, has guaranteed invariable clamp force output, avoids treating the surface of centre gripping material and receives the damage.

Description

Clamp with constant clamping force

Technical Field

The application relates to the technical field of tool equipment, in particular to a clamp with constant clamping force.

Background

The jig is a device for fixing a processing object to occupy a correct position for receiving construction or inspection in a machine manufacturing process, and is also called a jig. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a jig.

In a new process, for fixing some special materials with force sensitivity, such as deformation exceeding critical force, the clamp is required to apply uniform clamping force to the material, while the clamping force provided by the existing clamp is not constant, and the phenomenon that the material cannot be fixed due to too small clamping force or the material performance is damaged due to too large clamping force is easy to occur when the material is fixed.

SUMMERY OF THE UTILITY MODEL

This application is to the inconstant problem of clamp force that current anchor clamps provided, has provided a invariable clamp force anchor clamps, appears the clamp force undersize when avoiding fixed material and can't play the fixed action or the too big circumstances of destroying material performance of clamp force, and concrete technical scheme is as follows:

a constant clamping force clamp comprises a bottom plate, a connecting rod mechanism, a clamping part and a buffering part; wherein the content of the first and second substances,

the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially hinged, and the end part of the first connecting rod, which is far away from the second connecting rod, is connected with the bottom plate;

the clamping part comprises a stop block, a sliding barrel and a sliding piece, the stop block is installed on the bottom plate and is far away from the first connecting rod, the sliding barrel is hinged with the end part, far away from the second connecting rod, of the third connecting rod, and the sliding piece is connected inside the sliding barrel in a sliding mode;

the buffer part comprises a sliding block, a connecting rod, a connecting plate and a plurality of springs, a cavity is formed in the sliding part, the sliding block is arranged in the cavity, one end of the connecting rod is connected with the connecting plate, the other end of the connecting rod penetrates through the end part, far away from the stop block, of the sliding part and is connected with the sliding block, one end of each spring is connected with the connecting plate, and the other end of each spring is connected with the end part of the sliding part;

the side wall of the sliding part is provided with a sliding groove along the sliding direction of the sliding part, the sliding groove is communicated with the cavity, the sliding block is connected with a connecting part, and the other end of the connecting part penetrates through the cavity and the sliding groove and then is connected with the sliding barrel.

Optionally, the end of the sliding member close to the connecting plate is provided with a detachable cover plate.

Optionally, a limiting groove body is arranged on the bottom plate, a limiting sliding block is connected to the bottom of the sliding barrel, the limiting sliding block is connected with the limiting groove body in a sliding mode, and the limiting sliding block and the limiting groove body are matched in shape.

Optionally, the limiting groove body is a dovetail groove.

Optionally, a first adjusting assembly is arranged on the bottom plate, the first adjusting assembly is used for adjusting the distance between the link mechanism and the stop block, and a driving end of the first adjusting assembly is connected with the first link.

Optionally, the first adjusting assembly comprises an adjusting screw, a threaded sleeve and a screwing part; wherein the content of the first and second substances,

one end of the bottom plate, which is close to the connecting rod mechanism, is connected with a first supporting block, one end of the adjusting screw rod penetrates through the first supporting block after being connected with the screwing part, and the middle part of the adjusting screw rod is in threaded connection with the threaded sleeve;

the threaded sleeve is connected with the end of the first connecting rod.

Optionally, a second supporting block is further connected to the bottom plate, an end portion, far away from the screwing portion, of the adjusting screw penetrates through the second supporting block, and the adjusting screw is rotatably connected with the second supporting block through a bearing piece.

Optionally, the buffer part includes a second adjusting component, the second adjusting component includes an adjusting nut, the outer surface of the connecting rod is provided with threads, the end part of the connecting rod close to the connecting plate penetrates through the rear of the connecting plate and is in threaded connection with the adjusting nut.

Optionally, the adjusting nut is a wing nut.

Optionally, a handheld portion is connected to an end portion of the second link close to the third link.

The application has the following beneficial effects:

the embodiment of the application provides a invariable clamp force anchor clamps, through having used the spring to remedy the dimensional error of treating centre gripping material man-hour, the elasticity that the spring produced is under the influence of small error, and is nearly unchangeable, thereby through the effect of spring, has guaranteed invariable clamp force output, avoids treating the surface of centre gripping material and receives the damage.

Drawings

FIG. 1 is a schematic diagram of a constant clamping force clamp according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of another embodiment of a first adjustment assembly in a constant clamping force clamp according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a sliding member and a cushioning portion of a constant clamping force clamp according to an embodiment of the present invention;

FIG. 4 is a right side view of a clamping portion of a constant clamping force clamp according to an embodiment of the present application;

reference numerals: 1. a base plate;

2. a clamping portion; 21. a stopper; 22. a slider; 221. a cavity; 222. a chute; 23. a slide cylinder; 24. a limiting groove body; 25. a slider; 26. a connecting portion;

3. a buffer section; 31. a connecting rod; 32. adjusting the nut; 33. a connecting plate; 34. a spring;

4. a link mechanism; 41. a first link; 42. a second link; 43. a hand-held portion; 44. a third link;

5. a first adjustment assembly; 51. a first support block; 52. a screwing part; 53. a threaded sleeve; 54. adjusting the screw rod; 55. a second support block;

6. the material to be clamped.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, the present embodiment provides a constant clamping force fixture, which includes a bottom plate 1, a link mechanism 4, a clamping portion 2 and a buffering portion 3; wherein the content of the first and second substances,

the link mechanism 4 comprises a first link 41, a second link 42 and a third link 44 which are hinged in sequence, wherein the end part of the first link 41 far away from the second link 42 is connected with the bottom plate 1;

the clamping part 2 comprises a stop block 21, a sliding cylinder 23 and a sliding part 22, the stop block 21 is installed on the bottom plate 1 and is far away from the first connecting rod 41, the sliding cylinder 23 is hinged with the end part of the third connecting rod 44 far away from the second connecting rod 42, and the sliding part 22 is connected inside the sliding cylinder 23 in a sliding manner;

the buffer part 3 comprises a slide block 25, a connecting rod 31, a connecting plate 33 and a plurality of springs 34, a cavity 221 is formed in the slider 22, the slide block 25 is arranged in the cavity 221, one end of the connecting rod 31 is connected with the connecting plate 33, the other end of the connecting rod 31 penetrates through the end part, far away from the stop block 21, of the slider 22 and is connected with the slide block 25, one end of each spring 34 is connected with the connecting plate 33, and the other end of each spring 34 is connected with the end part of the slider 22;

the side wall of the sliding member 22 is provided with a sliding groove 222 along the sliding direction of the sliding member 22, the sliding groove 222 is communicated with the cavity 221, the sliding block 25 is connected with a connecting portion 26, and the other end of the connecting portion 26 passes through the cavity 221 and the sliding groove 222 and then is connected with the sliding cylinder 23.

As mentioned above, referring to fig. 1, the material 6 to be clamped is placed between the stopper 21 and the sliding member 22, the second connecting rod 42 is pushed, the end of the second connecting rod 42 hinged to the first connecting rod 41 rotates around the hinged point, and the third connecting rod 44 is driven to rotate, during the rotation, the end of the third connecting rod 44 connected with the sliding cylinder 23 drives the sliding cylinder 23 and the sliding member 22 to move towards the stopper 21, the end of the sliding member 22 abuts against the material 6 to be clamped, the sliding cylinder 23 and the sliding member 22 continue to move rightwards, while the end of the sliding member 22 is fixed, the sliding cylinder 23 continues to move rightwards, due to the connecting part 26, the sliding cylinder 23 drives the sliding block 25 inside the cavity 221 of the sliding member 22 to move rightwards, the connecting rod 31 connected with the sliding block 25 and the connecting plate 33 move rightwards, so that the distance between the connecting plate 33 and the sliding member 22 is reduced, the spring 34 is compressed, while the elastic force of the spring 34 generates a pushing force on the sliding member 22, and causes the slide 22 to push the material 6 to be clamped, compressing the clamping material between the slide 22 and the stop 21.

The size error that present anchor clamps will produce very big clamp force owing to wait that clamping material 6 adds man-hour, small error distance to lead to waiting that the clamping face of clamping material 6 receives the damage, this scheme has used spring 34, can compensate this small error distance, and the elasticity that spring 34 produced is under small error influence, and is almost unchangeable, thereby through spring 34's effect, has guaranteed invariable clamp force output, avoids waiting that the surface of clamping material 6 receives the damage.

It should be noted that, as shown in fig. 1, after the sliding member 22 moves to the right and clamps the material 6 to be clamped, the linkage mechanism 4 needs to maintain the rotated state, which may be that the operator always applies force to the linkage mechanism 4 by hand, but it is troublesome, and two solutions are proposed herein, the first solution is to provide the hinge between the first link 41 and the second link 42 and the hinge between the second link 42 and the third link 44 as a fastenable bolt-and-nut structure, so that the nut can be loosened when the linkage mechanism 4 rotates, and the nut can be tightened when the fixation is needed; the second scheme is that a fixing member is arranged on the bottom plate 1, the fixing member comprises two clamping plates, the two clamping plates are respectively positioned at two sides of the third connecting rod 44, the upper ends of the two clamping plates are connected through a bolt and nut structure, after the third connecting rod 44 moves to a position where the material 6 to be clamped can be clamped, the upper ends of the two clamping plates are connected through the bolt and nut structure, and at the moment, the third connecting rod 44 is clamped between the two clamping plates, so that the position of the third connecting rod 44 can be fixed.

As an alternative embodiment, the end of the slider 22 close to the connecting plate 33 is provided as a removable cover plate.

According to the scheme, the end part, far away from the connecting plate 33, of the connecting rod 31 penetrates through the cover plate and then is connected with the sliding block 25, the two ends of the connecting part 26 are connected with the sliding block 25 and the sliding barrel 23 through screws respectively, the sliding block 25 is convenient to detach and install, the requirements of an operator for checking and repairing the device are met, only damaged parts need to be replaced, and the cost is saved.

As an optional embodiment, a limiting groove body 24 is arranged on the bottom plate 1, a limiting slide block 25 is connected to the bottom of the slide cylinder 23, the limiting slide block 25 is connected with the limiting groove body 24 in a sliding manner, and the limiting slide block 25 and the limiting groove body 24 are matched in shape.

According to the scheme, in the process that the sliding barrel 23 moves rightwards, the limiting slide block 25 and the limiting groove body 24 are matched with each other to limit the sliding path of the sliding barrel 23 to transversely slide, so that the path is fixed, and when the material 6 to be clamped is prevented from being clamped, due to non-transverse movement, the corner point of the end part of the sliding part 22 is firstly contacted with the end face of the material 6 to be clamped, and therefore scratches are formed on the end face of the material 6 to be clamped.

As an alternative embodiment, the limiting groove body 24 is a dovetail groove, and besides the structure shown in fig. 3, the groove wall of the limiting groove body 24 may be an arc surface or a rectangular hole, and further, a roller may be installed at the bottom of the limiting slider 25, so that the friction between the limiting slider 25 and the limiting groove body 24 may be reduced, and the limiting slider 25 may slide.

As an alternative embodiment, a first adjusting assembly 5 is disposed on the bottom plate 1, the first adjusting assembly 5 is used for adjusting the distance between the link mechanism 4 and the stop 21, and a driving end of the first adjusting assembly 5 is connected to the first link 41.

As above, the first adjusting component 5 can be a telescopic rod besides the following structure, the telescopic rod can be a hydraulic rod or an air cylinder, the driving end of the telescopic rod is connected with the first connecting rod 41, and the other end of the telescopic rod is fixed on the bottom plate 1.

According to the scheme, the first adjusting assembly 5 is arranged, so that the position of the first connecting rod 41 on the bottom plate 1 can be adjusted, the positions of the sliding cylinder 23 and the sliding piece 22 on the bottom plate 1 are adjusted, namely, the distance between the end part of the sliding piece 22 and the stop block 21 is adjusted, the device can clamp materials 6 to be clamped in different sizes, and the universality of the device is improved.

As an alternative embodiment, the first adjustment assembly 5 comprises an adjustment screw 54, a threaded sleeve 53, a screw 52; one end of the bottom plate 1 close to the link mechanism 4 is connected with a first supporting block 51, one end of an adjusting screw 54 is connected with the screwing part 52 and then penetrates through the first supporting block 51, and the middle part of the adjusting screw 54 is in threaded connection with a threaded sleeve 53; the threaded sleeve 53 is connected to the end of the first link 41.

As mentioned above, in another embodiment of the first adjusting assembly 5, at this time, the screwing part 52 can be screwed, the adjusting screw 54 rotates, so as to drive the threaded sleeve 53 in threaded connection with the adjusting screw 54 to move transversely, the threaded sleeve 53 drives the first connecting rod 41 to move on the bottom plate 1, so as to adjust the distance between the end of the sliding part 22 and the stop 21, so that the device can clamp materials 6 to be clamped with different sizes, and the universality of the device is increased.

As an alternative embodiment, a second supporting block 55 is further connected to the base plate 1, an end of the adjusting screw 54 far from the screwing portion 52 penetrates through the second supporting block 55, and the adjusting screw 54 and the second supporting block 55 are rotatably connected through a bearing member.

As above, the second support block 55 increases the support function for the adjusting screw 54, and further uses a bearing member for connection, so that the screwing of the screwing part 52 is easier and the adjustment is more convenient.

As an alternative embodiment, the buffer part 3 includes a second adjusting component, the second adjusting component includes an adjusting nut 32, the outer surface of the connecting rod 31 is provided with threads, and the end of the connecting rod 31 near the connecting plate 33 penetrates through the connecting plate 33 and is in threaded connection with the adjusting nut 32.

As above, the distance between the connecting plate 33 and the sliding member 22 is adjusted by the second adjusting component, so that the preset elastic force of the spring 34 can be adjusted to adjust the clamping force of the clamp.

As an alternative embodiment, the adjusting nut 32 is a wing nut, so that the operator can directly screw the adjusting nut 32 by hand without using other tools, so as to adjust the distance between the connecting plate 33 and the slider 22.

As an alternative embodiment, a hand-held portion 43 is connected to the end of the second link 42 close to the third link 44, so that the operator can push the second link 42 to rotate.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. A clamp with constant clamping force is characterized by comprising a bottom plate, a connecting rod mechanism, a clamping part and a buffering part; wherein the content of the first and second substances,

2. A constant clamping force clamp according to claim 1 wherein the end of said slider adjacent said web is provided as a removable cover.

3. The clamp with the constant clamping force as claimed in claim 1, wherein a limiting groove body is arranged on the bottom plate, a limiting slide block is connected to the bottom of the slide cylinder, the limiting slide block is connected with the limiting groove body in a sliding mode, and the limiting slide block and the limiting groove body are matched in shape.

4. A constant clamping force clamp according to claim 3 wherein said retaining slot body is a dovetail slot.

5. A constant clamping force clamp according to claim 1 wherein a first adjustment assembly is provided on said base plate for adjusting the distance between the linkage and said stop, said first adjustment assembly having a drive end connected to said first link.

6. The constant clamping force clamp of claim 5, wherein said first adjustment assembly includes an adjustment screw, a threaded sleeve, a threaded portion; wherein the content of the first and second substances,

the threaded sleeve is connected with the end of the first connecting rod.

7. The constant clamping force apparatus according to claim 6, wherein a second support block is further connected to said base plate, an end of said adjusting screw remote from said screw portion extends through said second support block, and said adjusting screw is rotatably connected to said second support block by a bearing member.

8. A constant clamping force clamp according to claim 1, wherein said bumper portion includes a second adjustment assembly, said second adjustment assembly including an adjustment nut, said connecting rod being threaded on an outer surface thereof, an end of said connecting rod adjacent said web extending through said web and being threadedly engaged with said adjustment nut.

9. The constant clamping force clamp of claim 8, wherein said adjustment nut is a wing nut.

10. A constant clamping force clamp according to claim 1 wherein a hand grip is attached to the end of said second link adjacent said third link.