Clamp with cam structure

Abstract

The utility model belongs to the technical field of clamp devices, and particularly relates to a clamp with a cam structure, which comprises a clamp body, two chucks and a cam component, a base and a support are respectively arranged at the lower end and the upper end of the clamp body, a through hole penetrating through the support is arranged in the support, and the two chucks are symmetrically and rotatably arranged in the through hole. The cam assembly comprises a cam, a connecting shaft and a rocker, one end of the connecting shaft is connected with the cam, and the rocker is fixedly installed at the other end of the connecting shaft. The spring is always in a compressed state, the clamping rods of the chucks are pushed inwards, the clamping parts of the chucks are far away from each other, the chucks are always in an open state as long as the workpieces are not clamped, the workpieces can be conveniently placed in the chucks to be clamped, and when the workpieces are clamped, the rocker and the cam are driven to make contact with and open the chuck supporting rods, and the clamping parts clamp the workpieces. The clamp is simple in structure and easy to produce, labor is saved when a workpiece is clamped, and follow-up machining is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamp devices, and in particular relates to a clamp with a cam structure. Background Art

[0002] The utility model with patent number CN206185537U discloses a cam clamping device, including a base plate, a positioning seat, a pressure rod, a guide sleeve, a handle, a rotating shaft, a cam, a clamping seat, and a return spring; the positioning seat and the clamping seat are installed in parallel on the base plate, the guide sleeve is connected to the clamping seat by screws, the pressure rod is installed on the guide sleeve and the clamping seat, the handle is installed on the cam, and the cam is installed in the clamping seat through a rotating shaft.

[0003] The device is not conducive to processing after the clamping device is clamped, and is not labor-saving enough, so it is necessary to improve the existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide a clamp with a cam structure, aiming to solve the technical problems of disadvantageous processing and insufficient labor saving after clamping in the prior art.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a clamp with a cam structure, comprising a clamp body, a clamp head and a cam assembly, wherein the lower end and the upper end of the clamp body are respectively provided with a base and a bracket, the bracket is provided with a through hole running through it, the clamp head is provided with two, which are symmetrically rotatably arranged in the through holes, and a spring is provided on the side of the lower end of the clamp head close to the clamp body, the spring connects the clamp head and the clamp body, the cam assembly comprises a cam, a connecting shaft and a rocker, the connecting shaft is located on one side of the bracket and is rotatably installed between the base of the clamp body and the bracket, the cam is fixedly installed on one end of the connecting shaft located on the bracket and abuts against the clamp head, the rocker is provided on the end of the connecting shaft away from the cam, and a bearing seat for mounting the connecting shaft is provided on the base, and the bearing seat is provided on the side of the base located on the rocker;

[0006] The rotation of the rocker drives the cam to rotate, and the cam always abuts against the inner side of the chuck. The cam drives the chuck to rotate, so that the lower end of the chuck moves outward, with the through hole as the center of the circle, and the upper end of the chuck approaches the workpiece to clamp the workpiece; otherwise, the workpiece is released.

[0007] Optionally, two positioning holes for rotatably mounting the chuck are provided in the through hole.

[0008] Optionally, the chuck is provided with a clamping portion and a clamping rod, the top end of the clamping rod is connected to the middle position of the clamping portion, and the upper portion of the clamping rod close to the clamping portion is provided with a pin hole that cooperates with the positioning hole.

[0009] Optionally, the thickness of the cam is greater than the thickness of the clamping rod.

[0010] Optionally, a groove is provided on a side of the cam close to the connecting shaft, and a rectangular hole passing through the cam is provided at the center of the cam.

[0011] Optionally, the connecting shaft is provided with a boss at one end of the cam, a rotating shaft tangent to the rectangular hole is provided at the center of the boss, and a connecting hole for installing the rocker is provided at the other end of the connecting shaft.

[0012] Optionally, the connecting shaft is rotatably mounted on a bearing seat, and the rectangular hole can slide relative to the rotating shaft, thereby causing the cam to move relatively on the rotating shaft.

[0013] Optionally, the length and width of the rectangular hole are parallel to those of the groove.

[0014] The above one or more technical solutions in the clamp with cam structure provided by the embodiment of the present invention have at least one of the following technical effects: by setting a connecting shaft to connect the cam and the rocker, an additional force arm of the clamping rod is added from the clamping point to the rocker, making it more labor-saving to clamp the rocker; and the workpiece is clamped at the bracket, and after clamping, the workpiece to be processed is conducive to subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic structural diagram of a clamp with a cam structure provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic structural diagram of a clamp with a cam structure provided in an embodiment of the present utility model;

[0018] Figure 3 An exploded structural diagram of a clamp with a cam structure provided according to an embodiment of the present utility model;

[0019] Figure 4 A schematic structural diagram of a connecting shaft provided along an embodiment of the present utility model;

[0020] Figure 5 The figure is a schematic diagram of the cam mechanism of the clamp with a cam structure provided in an embodiment of the present utility model.

[0021] Among them, the reference numerals in the figures are:

[0022] 10. Clamp body; 11. Base; 12. Bracket; 13. Bearing seat; 20. Clamp; 21. Clamping part; 22. Clamping rod; 30. Cam assembly; 31. Cam; 32. Connecting shaft; 33. Rocker;

[0023] 121, through hole; 122, positioning hole; 221, pin hole; 311, groove; 312, rectangular hole; 321, boss; 322, rotating shaft; 323, connecting hole. DETAILED DESCRIPTION

[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that if there are directional indications in the embodiments of the present invention, such as the orientation or position relationship of up, down, left, right, front, back, inside, and outside, which are based on the orientation or position relationship shown in the accompanying drawings, it is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the embodiments of the present invention, unless otherwise specified or limited, terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0028] In one embodiment of the present invention, Figure 1-5As shown, a clamp with a cam structure is provided, including a clamp body 10, a clamp head 20 and a cam assembly 30. The lower end of the clamp body 10 is provided with a base 11. Above the base 11, that is, the upper end of the clamp body 10 is provided with a bracket 12. The bracket 12 is provided with a through hole 121 that passes through the upper and lower surfaces thereof. The through hole 121 is provided with two positioning holes 122 that pass through the front and rear surfaces thereof. The clamp head 20 is provided with two, and the clamp head 20 is set in a "T" shape, including a clamping portion 21 and a clamping rod 22. The top end of the clamping rod 22 is connected to the clamping portion 21. Connected to the middle position of the clamping portion 21, and the clamping rod 22 is provided with a pin hole 221 matching the positioning hole 122 near the upper part of the clamping portion 21. The chuck 20 is provided in the through hole 121, and the pin hole 221 is aligned with the positioning hole 122. The chuck 20 is connected by a pin shaft. The chuck 20 can be rotatably installed in the through hole 121 and can be rotated in the through hole 121 of the clamp body 110 with the positioning hole 122 as the center of the circle. A spring is provided on the side of the lower end of the chuck 20 near the bracket 12, and the spring connects the lower end of the chuck 20 to the bracket 12;

[0029] The cam assembly 30 includes a cam 31, a connecting shaft 32 and a rocker 33. The connecting shaft 32 is located on one side of the bracket 12 and is rotatably installed between the base 11 of the clamp body 10 and the bracket 12. This connecting shaft 32 is located at one end of the bracket 12 and is connected to the cam 31. The rocker 33 is fixedly installed on the end of the connecting shaft 32 away from the cam 31. The swing of the rocker 33 can drive the cam 31 to rotate, and a bearing seat 13 for installing the connecting shaft 32 is provided on the base 11. This bearing seat 13 is provided on the side of the base 11 close to the rocker 33.

[0030] When the rocker 33 rotates and drives the cam 31 to rotate, the cam 31 always abuts against the inner side of the two chucks 20, and the chucks 20 are driven to rotate by the cam 31. The two chucks 20 rotate with the positioning hole 122 as the center of the circle, the lower ends of the clamping rods 22 move away from each other, and the clamping parts 21 move closer to each other to clamp the workpiece, otherwise, the workpiece is released.

[0031] It is worth noting that when clamping the workpiece, the clamping rod 22 of the chuck 20 moves outward, that is, approaches the bracket 12 .

[0032] Preferably, a groove 311 is provided on the side of the cam 31 close to the connecting shaft 32, and a rectangular hole 312 is also provided in the groove 311 that passes through the cam 31. A boss 321 is provided on the end of the connecting shaft 32 connected to the cam 31, and a rotating shaft 322 tangent to the rectangular hole 312 is provided on the boss 321. The rotating shaft 322 is rotatably installed in the rectangular hole 312, and the boss 321 is engaged in the groove 311 of the cam 31. The cam 31 can rotate and move relative to the rotating shaft 322 and the boss 321 by relying on the rectangular hole 312 and the groove 311. The side of the connecting shaft 32 away from the boss 321 is rotatably installed on the bearing seat 13, and a connecting hole 323 for installing the rocker 33 is provided on the other end of the connecting shaft 32 away from the cam 31, and the rocker 33 is fixedly installed in the connecting hole 323.

[0033] Preferably, the length and width of the rectangular hole 312 are parallel to those of the groove 311 , so that when the workpiece is not clamped, the groove 311 is in a horizontal position along with the rectangular hole 312 , and the cam 31 can move relative to the rotating shaft 322 .

[0034] Preferably, the thickness of the cam 31 is greater than the thickness of the clamping rod 22 , so that the cam 31 and the clamping rod 22 have a larger contact area, so that the force between them is better.

[0035] Working principle: When the workpiece needs to be clamped, the user drives the rocker 33, and the connecting shaft 32 drives the cam 31 to rotate, stretching the clamping rod 22 of the chuck 20, so that the clamping parts 21 are close to each other to clamp the workpiece. At this time, the oblong hole 312 and the groove 311 are in a vertical direction, and the cam 31 cannot move relative to the rotating shaft 322, thereby clamping the workpiece; when the workpiece needs to be loosened, the rocker 33 is driven to rotate the cam 31. At the same time, the spring reaction force and the clamping rod 22 make the clamping parts 21 close to each other. At the same time, the oblong hole 312 and the groove 311 are in a horizontal direction, and the clamping parts 21 move away from each other to loosen the workpiece. At this time, the cam 31 can move relative to the rotating shaft 322, so that the clamping part 21 is in an active state, which is convenient for clamping the workpiece.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A clamp with a cam structure, characterized in that: The invention comprises a clamp body (10), a clamp head (20) and a cam assembly (30), wherein the lower end and the upper end of the clamp body (10) are respectively provided with a base (11) and a bracket (12), wherein the bracket (12) is provided with a through hole (121) which runs through the bracket, and the clamp head (20) is provided with two symmetrical and rotatable clamps in the through hole (121), and a spring is provided on the side of the lower end of the clamp head (20) close to the clamp body (10), wherein the spring connects the clamp head (20) and the clamp body (10), and the cam assembly (30) comprises a cam (31), a connecting shaft (32) and a rocking shaft. The rod (33) is provided with a connecting shaft (32) located on one side of the bracket (12) and is rotatably mounted between the base (11) of the clamp body (10) and the bracket (12); the cam (31) is mounted on one end of the connecting shaft (32) located on the bracket (12) and is in contact with the chuck (20); the rocker (33) is provided on one end of the connecting shaft (32) away from the cam (31); and a bearing seat (13) for mounting the connecting shaft (32) is provided on the base (11); and the bearing seat (13) is provided on one side of the base located on the rocker (33); The rocker (33) rotates to drive the cam (31) to rotate, and the cam (31) always abuts against the inner side of the chuck (20). The cam (31) drives the chuck (20) to rotate, so that the lower end of the chuck (20) moves outward, with the through hole (121) as the center of the circle, and the upper end of the chuck (20) approaches the workpiece to clamp the workpiece; otherwise, the workpiece is released.

2. The clamp with a cam structure according to claim 1, characterized in that: Two positioning holes (122) for rotatably mounting the clamp (20) are provided in the through hole (121).

3. The clamp with a cam structure according to claim 2, characterized in that: The chuck (20) is T-shaped and is provided with a clamping portion (21) and a clamping rod (22). The top end of the clamping rod (22) is connected to the middle position of the clamping portion (21). The clamping rod (22) is provided with a pin hole (221) that matches the positioning hole (122) near the upper part of the clamping portion (21).

4. The clamp with a cam structure according to claim 3, characterized in that: The thickness of the cam (31) is greater than the thickness of the clamping rod (22).

5. The clamp with a cam structure according to claim 1, characterized in that: A groove (311) is provided on one side of the cam (31) close to the connecting shaft (32), and a rectangular hole (312) penetrating the cam (31) is provided at the center of the cam (31).

6. The clamp with a cam structure according to claim 5, characterized in that: The connecting shaft (32) is provided with a boss (321) at one end of the cam (31), a rotating shaft (322) tangential to the rectangular hole (312) is provided at the center of the boss (321), and a connecting hole (323) for installing the rocker (33) is provided at the other end of the connecting shaft (32).

7. The clamp with a cam structure according to claim 6, characterized in that: The connecting shaft (32) is rotatably mounted on the bearing seat (13), and the rectangular hole (312) can slide relative to the rotating shaft (322), thereby causing the cam (31) to move relatively on the rotating shaft (322).

8. The clamp with a cam structure according to claim 6, characterized in that: The length and width of the rectangular hole (312) and the groove (311) are parallel to each other.

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