A clamp

Abstract

The present invention discloses a clamp, which relates to the technical field of handling equipment, and comprises: two clamping rods, a support member, a driving device, two connecting rods and two swing rods. The two clamping rods are respectively connected to the support member by rotation around a first axis and a second axis which are parallel to each other. The clamping ends of the two clamping rods are used to clamp a workpiece when they are close to each other, and are used to loosen the workpiece when they are far away from each other. One end of the two clamping rods away from the clamping end is respectively connected to the two connecting rods by rotation around a third axis. One end of the two connecting rods away from the clamping rods is connected to the free end of the driving device by rotation around a fourth axis. The third axis and the fourth axis are both parallel to the first axis. The driving device can drive the connecting rods to rotate around the third axis. One end of the two swing rods is connected to the support member, and the other end is connected to the driving device. The two clamping rods are symmetrical about a plane. The driving device can drive the two connecting rods until the two connecting rods are perpendicular to the plane. Therefore, the clamp provided by the present invention has stable clamping.

Description

Technical Field

[0001] The present invention relates to the technical field of handling equipment, in particular to a clamp. Background Art

[0002] When transporting or assembling workpieces, it is often necessary to use clamps for lifting. At present, most of the existing clamps are clamps with two clamping rods rotating and connected to each other. When using such clamps to clamp the workpiece, the distance between the clamping ends of the two clamping rods is uncertain and easy to change, which leads to changes in the clamping state during the clamping process due to the change in the distance between the clamping ends, and the clamping is unstable. Therefore, a new type of clamp is urgently needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a clamp to solve the problems existing in the above-mentioned prior art and to provide stable and reliable clamping.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a clamp, comprising: two clamping rods, a support member, a driving device, two connecting rods and two rocker arms, the two clamping rods are respectively connected to the support member by rotation around a first axis and a second axis which are parallel to each other, the clamping ends of the two clamping rods are used to clamp a workpiece when they are close to each other, and are used to loosen the workpiece when they are far away from each other; one end of the two clamping rods away from the clamping end is respectively connected to the two connecting rods by rotation around a third axis, one end of the two connecting rods away from the clamping rods is connected to the free end of the driving device by rotation around a fourth axis, the third axis and the fourth axis are both parallel to the first axis, and the driving device can drive the connecting rods to rotate around the third axis; one end of the two rocker arms is connected to the support member, and the other end is connected to the driving device, the two clamping rods are symmetrical about a plane, and the driving device can drive the two connecting rods to move until the two connecting rods are coaxial and perpendicular to the plane.

[0006] Preferably, the driving device includes a cylinder, a cylinder support plate and a connecting head, the cylinder support plate is fixedly connected to the cylinder, the connecting head is fixedly connected to the free end of the cylinder, the two connecting rods are rotatably connected to the connecting head around the fourth axis, and one end of the rocker arm is connected to the cylinder support plate.

[0007] Preferably, the support member includes two sub-support members, the two sub-support members are arranged opposite to each other with a gap therebetween, and one end of the clamping rod is located between the two sub-support members and is rotatably connected to the two sub-support members.

[0008] Preferably, it also includes two chucks, which are respectively hinged to the clamping ends of the two clamping rods, and a mounting groove is provided on the opposite sides of the chucks. One end of the clamping rod is located in the mounting groove and is rotatably connected to the chuck.

[0009] Preferably, a receiving groove is provided on each opposite side of the chuck, a pad is fixedly installed in the receiving groove, and the pad protrudes from the receiving groove.

[0010] Preferably, it also includes two fixed brackets, which are respectively arranged on both sides of the support member, one end of the two fixed brackets is fixedly connected to the cylinder support plate, and the other end is provided with two limiting surfaces, which are respectively in contact with the support member and the chuck.

[0011] Preferably, the clamping rod includes three sub-clamping rods, which are connected in sequence and the sub-clamping rods at both ends are not parallel to the middle sub-clamping rod, and the sub-clamping rods at both ends are respectively located on both sides of the middle sub-clamping rod; when in the locked state, the middle sub-clamping rod is in a vertical state.

[0012] Preferably, the cylinder support plate is fixedly connected to one end of the cylinder, the output end of the cylinder passes through the middle of the cylinder support plate, a slot is provided on both sides of the cylinder support plate, and the two rocker arms are respectively located in the two slots and are rotatably connected to the cylinder support plate.

[0013] Preferably, the fixed bracket includes two fixed plates and a connecting tube, the two fixed plates are arranged opposite to each other, the connecting tube is arranged between the two fixed plates and the two ends of the connecting tube are respectively fixedly connected to the two fixed plates, and the two fixed plates are fixedly connected to the cylinder support plate.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The present invention provides a clamp, wherein a driving device drives the opening and closing of a clamping rod to realize the two processes of clamping and loosening a workpiece. When clamping a workpiece within a specific size range, when the driving device drives the two connecting rods to rotate to be on the same straight line, and the driving device can keep the two connecting rods always on the same straight line during the clamping process, the forces exerted on the two connecting rods by the clamping rod are opposite in direction and equal in magnitude, and the resultant force exerted on the two connecting rods as a whole is zero. Therefore, the entire clamping process does not generate any force on the driving device, and under the action of the connecting rod, the two clamping rods will not be stretched outward, and the spacing between the clamping ends of the two clamping rods is consistent, thereby making the clamping of the workpiece by the clamping rod stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0017] Figure 1 A schematic diagram of the structure of the clamp provided by the present invention when it is in an open state;

[0018] Figure 2 A schematic diagram of the structure of the clamp provided by the present invention when it is in a locked state;

[0019] Figure 3 A partial structural schematic diagram of the clamp provided by the present invention;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the driving device in the middle fixture;

[0021] Figure 5 A partial structural schematic diagram of the clamp provided by the present invention;

[0022] Figure 6 A partial structural schematic diagram of the clamp provided by the present invention;

[0023] In the figure: 1-cylinder, 2-support, 3-clamping rod, 4-connecting rod, 5-connecting head, 6-fixed bracket, 7-clamp, 8-cylinder support plate, 9-rocker, 10-slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide a clamp to solve the problems existing in the prior art and to provide stable and reliable clamping.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The present invention provides a clamp, such as Figures 1 to 6As shown, it includes: two clamping rods 3, a support member 2, a driving device, two connecting rods 4 and two rocker rods 9. The two clamping rods 3 are respectively connected to the support member 2 by rotating around a first axis and a second axis which are parallel to each other. The clamping ends of the two clamping rods 3 are used to clamp the workpiece when they are close to each other, and are used to release the workpiece when they are far away from each other. One end of the two clamping rods 3 away from the clamping end is respectively connected to the two connecting rods 4 by rotating around a third axis. One end of the two connecting rods 4 away from the clamping rods 3 is connected to the free end of the driving device by rotating around a fourth axis. The third axis and the fourth axis are both parallel to the first axis. The driving device can drive the connecting rod 4 to rotate around the third axis. One end of the two rocker rods 9 is connected to the support member 2, and the other end is connected to the driving device. The two clamping rods 3 are symmetrical about a plane. The driving device can drive the two connecting rods 4 to move to be coaxial and at this time, the two connecting rods 4 are perpendicular to the plane.

[0028] The driving device drives the opening and closing of the clamping rod 3 to realize the clamping and loosening processes of the workpiece. When clamping the workpiece within a specific size range, when the driving device drives the two connecting rods 4 to rotate to be on the same straight line, and the driving device can keep the two connecting rods 4 always on the same straight line during the clamping process, the forces of the clamping rod 3 applied to the two connecting rods 4 are opposite in direction and the same in magnitude, and the resultant force applied to the two connecting rods 4 as a whole is zero. Therefore, the entire clamping process does not generate any force on the driving device, and the driving device does not need to do work. Under the action of the connecting rod 4, the two clamping rods 3 will not be stretched outward, and the spacing between the clamping ends of the two clamping rods 3 is consistent, so that the clamping rod 3 can clamp the workpiece stably and reliably, and will not damage the workpiece.

[0029] Furthermore, the driving device includes a cylinder 1, a cylinder support plate 8 and a connecting head 5. The cylinder support plate 8 is fixedly connected to the cylinder 1, the connecting head 5 is fixedly connected to the free end of the cylinder 1, two connecting rods 4 are rotatably connected to the connecting head 5 around a fourth axis, one end of a rocker rod 9 is connected to the cylinder support plate 8, and the rocker rod 9 plays the role of directly supporting the support member 2 and indirectly supporting the clamping rod 3 and the connecting rod 4. The connecting head 5 is a concave hinge block, the upper end of the concave hinge block is fixedly connected to the axial end of the cylinder 1, and the two side protrusions of the lower end of the concave hinge block are rotatably connected to the connecting rod 4 through pins.

[0030] Furthermore, the support member 2 includes two sub-support members, which are dovetail-shaped. The two sub-support members are arranged opposite to each other with a gap between them. One end of the clamping rod 3 is located between the two sub-support members and is rotatably connected to the two sub-support members. A pin hole is provided on both sides of the lower end of each sub-support member, and the two ends of the pin shaft are respectively fixedly connected to two opposite pin holes in the two sub-support members. One end of the clamping rod 3 is sleeved on the pin shaft and forms a hinge structure with the support member 2. The above hinge structure is relatively stable.

[0031] Furthermore, it includes two chucks 7, which are respectively hinged to the clamping ends of the two clamping rods 3, and the shape of the chuck 7 is as shown in the figure. Under the action of gravity, one end face of the chuck 7 facing the workpiece is always in a vertical state. Therefore, in the process of clamping the workpiece, the end of the chuck facing the workpiece is always close to the workpiece; a mounting groove is provided on the opposite side of the chuck 7, one end of the clamping rod 3 is located in the mounting groove and is rotatably connected to the chuck 7, and the workpiece is clamped by the chuck 7. The contact area between the chuck 7 and the workpiece is large. Therefore, under the action of equal holding force, the chuck 7 with a larger area exerts less pressure on the unit area of ​​the workpiece.

[0032] Furthermore, a receiving groove is provided on each opposite side of the clamp 7, and a pad is fixedly installed in the receiving groove. The pad protrudes from the receiving groove, and the pad can be detachably installed in the receiving groove.

[0033] Furthermore, the pad body may be a rubber pad.

[0034] Furthermore, it also includes two fixed brackets 6, which are respectively arranged on both sides of the support member 2. One end of the two fixed brackets 6 is fixedly connected to the cylinder support plate 8, and the other end is provided with two limit surfaces, which are respectively in contact with the support member 2 and the clamp 7. The limit surfaces are used to limit the movement of the clamp 7 and the support member 2 to the outside.

[0035] Furthermore, the clamping rod 3 includes three sub-clamping rods, which are connected in sequence and the sub-clamping rods at both ends are not parallel to the middle sub-clamping rod, and the sub-clamping rods at both ends are respectively located on both sides of the middle sub-clamping rod; the clamping rod 3 is S-shaped as a whole, and when in the locked state, the middle sub-clamping rod is in a vertical state.

[0036] Furthermore, the cylinder support plate 8 is fixedly connected to one end of the cylinder 1, and the output end of the cylinder 1 passes through the middle of the cylinder support plate 8. A slot 10 is provided on both sides of the cylinder support plate 8, and two rocker arms 9 are respectively located in the two slots 10 and are rotatably connected to the cylinder support plate 8.

[0037] Furthermore, the fixed bracket 6 includes two fixed plates and a connecting tube, the two fixed plates are arranged opposite to each other, the connecting tube is arranged between the two fixed plates and the two ends of the connecting tube are respectively fixedly connected to the two fixed plates, the two fixed plates are both fixedly connected to the cylinder support plate 8, and a limiting protrusion is provided on the side of the support member 2 facing the fixed bracket 6. The two fixed plates in the same fixed bracket 6 are respectively located on both sides of the limiting protrusion and contact with the limiting protrusion, and the fixed plate and the limiting protrusion cooperate to limit the support member 2.

[0038] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A clamp, characterized in that: include: Two clamping rods, a support member, a driving device, two connecting rods and two swing rods, the two clamping rods are respectively connected to the support member by rotation around a first axis and a second axis which are parallel to each other, the clamping ends of the two clamping rods are used to clamp a workpiece when they are close to each other, and are used to release the workpiece when they are far away from each other; one end of the two clamping rods away from the clamping end is respectively connected to the two connecting rods by rotation around a third axis, one end of the two connecting rods away from the clamping rods is connected to the free end of the driving device by rotation around a fourth axis, the third axis and the fourth axis are both parallel to the first axis, and the driving device can drive the connecting rod to rotate around the third axis; one end of the two swing rods is connected to the support member, and the other end is connected to the driving device, the two clamping rods are symmetrical about a plane, and the driving device can The invention can drive the two connecting rods to move until the two connecting rods are coaxial and perpendicular to the plane; the driving device includes a cylinder, a cylinder support plate and a connecting head; it also includes two chucks, which are respectively hinged to the clamping ends of the two clamping rods; it also includes two fixed brackets, which are respectively arranged on both sides of the support member, one end of the two fixed brackets is fixedly connected to the cylinder support plate, and the other end is provided with two limit surfaces, and the two limit surfaces are respectively in contact with the support member and the chuck; the fixed bracket includes two fixing plates and a connecting tube, the two fixing plates are arranged opposite to each other, the connecting tube is arranged between the two fixing plates and the two ends of the connecting tube are respectively fixedly connected to the two fixing plates, and the two fixing plates are fixedly connected to the cylinder support plate; a receiving groove is provided on the opposite side of the chuck, and a pad body is fixedly installed in the receiving groove, and the pad body protrudes from the receiving groove.

2. The clamp according to claim 1, characterized in that: The cylinder support plate is fixedly connected to the cylinder, the connecting head is fixedly connected to the free end of the cylinder, the two connecting rods are rotatably connected to the connecting head around the fourth axis, and one end of the rocker arm is connected to the cylinder support plate.

3. The clamp according to claim 1, characterized in that: The support member comprises two sub-support members, the two sub-support members are arranged opposite to each other with a gap therebetween, and one end of the clamping rod is located between the two sub-support members and is rotatably connected to the two sub-support members.

4. The clamp according to claim 2, characterized in that: A mounting groove is provided on one side of the clamping head which is away from the other side. One end of the clamping rod is located in the mounting groove and is rotatably connected to the clamping head.

5. The clamp according to claim 1, characterized in that: The clamping rod includes three sub-clamping rods, which are connected in sequence and the sub-clamping rods at both ends are not parallel to the sub-clamping rod in the middle. The sub-clamping rods at both ends are respectively located on both sides of the sub-clamping rod in the middle; when in the locked state, the sub-clamping rod in the middle is in a vertical state.

6. The clamp according to claim 2, characterized in that: The cylinder support plate is fixedly connected to one end of the cylinder, the output end of the cylinder passes through the middle of the cylinder support plate, a slot is provided on both sides of the cylinder support plate, and the two rocker arms are respectively located in the two slots and are rotatably connected to the cylinder support plate.

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