Opening clamping arm rotating mechanism

Abstract

The utility model discloses a clamping arm opening rotating mechanism which comprises a rotating fixing seat, a plurality of through mounting holes are formed in the rotating fixing seat, the mounting holes are connected with a rotating structure, the rotating fixing seat is connected with a clamping jaw through the rotating structure, and a shaft hole is formed in the end of the clamping jaw. The rotating structure comprises a connecting shaft and a rotating piece, the rotating piece is connected to the end of the connecting shaft in a sleeving mode, and the outer side of the rotating piece is attached to the inner wall of the shaft hole. The clamping device has the beneficial effects that when the clamping jaw and the connecting shaft rotate, the clamping jaw and the connecting shaft do not move vertically relative to the rotary fixed seat; meanwhile, when the rotary outer ring rotates relative to the fixed inner ring through a plurality of balls, the clamping jaw and the connecting shaft can rotate relatively to the fixed inner ring; the first rotating ring of the outer ring of the thrust washer and the second rotating ring of the outer ring of the positioning washer can rotate along with the rotating outer rings on the two sides, and the other side of the second rotating ring does not make contact with the rotating fixing base, so that friction force can be reduced, abrasion is reduced, and the service life of the rotating mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to a rotating mechanism, in particular to a clamping arm rotating mechanism, belonging to the technical field of mechanical manufacturing. Background Technique

[0002] In the field of mechanical manufacturing, clamping arms are generally widely used as fixtures or robotic arms. A fixture is a device for fixing a processing object, while a robotic arm is an automatic operating device that can imitate some action functions of a human hand and arm to grasp, transport objects or operate tools according to a fixed program.

[0003] In these devices, the clamping arm usually refers to the opening of the clamping part of the fixture or robotic arm to clamp or release the workpiece. The opening and closing of the clamping arm are generally realized by the rotation of the rotating shaft of the clamping arm. In order to reduce the friction between the clamping arm and the rotating shaft, a rotating mechanism is arranged between the clamping arm and the rotating shaft. The rotating mechanism generally adopts the method of bearings and support frames. The clamping arm can rotate on the support frame through the bearings. However, when the existing bearings are installed, washers are generally arranged on both sides to limit their positions. However, the bearing is divided into an outer ring and an inner ring. When the outer ring rotates relative to the inner ring, it still rubs against the washers, which is prone to wear or displacement. Content of the Utility Model

[0004] The purpose of the utility model is to provide a clamping arm rotating mechanism to solve the above problems. By setting an intermediate flat washer, a thrust washer and a positioning washer, and a first rotating ring is arranged on the outer ring of the thrust washer and a second rotating ring is arranged on the outer ring of the positioning washer, an effective positioning effect can be achieved on the two bearings, so that when the clamping jaw and the connecting shaft rotate, there will be no vertical displacement relative to the rotating fixed seat. At the same time, when the outer rotating ring rotates relative to the fixed inner ring through a plurality of balls, the first rotating ring on the outer ring of the thrust washer and the second rotating ring on the outer ring of the positioning washer can rotate along with the outer rotating rings on both sides, and the other side of the second rotating ring does not contact the rotating fixed seat, so that the friction can be reduced, the wear can be reduced, and the service life of the rotating mechanism can be improved.

[0005] The utility model realizes the above purpose through the following technical solutions. A clamping arm rotating mechanism includes a rotating fixed seat. The rotating fixed seat is provided with a plurality of through mounting holes. The mounting holes are connected with a rotating structure, and the rotating fixed seat is connected with a clamping jaw through the rotating structure. A shaft hole is opened at the end of the clamping jaw;

[0006] The rotating structure includes a connecting shaft and a rotating part. The rotating part is sleeved at the end of the connecting shaft, and the outer side of the rotating part is attached to the inner wall of the shaft hole.

[0007] Preferably, the rotating member includes an intermediate flat washer, a thrust washer, and a positioning washer. Bearings are provided between the intermediate flat washer and the thrust washer, and between the intermediate flat washer and the positioning washer. The other sides of the thrust washer and the positioning washer are respectively in close contact with the end of the connecting shaft and the rotating fixed seat.

[0008] Preferably, the bearing includes a fixed inner ring and a rotating outer ring. The inner wall of the fixed inner ring fits against the outer side of the connecting shaft, and the rotating outer ring is located outside the fixed inner ring. The outer ring of the rotating outer ring is in interference fit with the inner wall of the shaft hole.

[0009] Preferably, a plurality of balls are provided between the fixed inner ring and the rotating outer ring.

[0010] Preferably, a first rotating ring is provided on the outer ring of the thrust washer. A first positioning ring is fixedly installed on the inner ring of the first rotating ring, and the first positioning ring is rotatably arranged inside the first rotating ring.

[0011] Preferably, the side surface of the first rotating ring is in close contact with one of the rotating outer rings.

[0012] Preferably, a second rotating ring is provided on the outer ring of the positioning washer. A second positioning ring is fixedly installed on the inner ring of the second rotating ring, and the second positioning ring is rotatably arranged inside the second rotating ring.

[0013] Preferably, one side of the second rotating ring is in close contact with the other rotating outer ring, and the other side of the second rotating ring is not in contact with the rotating fixed seat.

[0014] The beneficial effects of the present utility model are as follows: During use, by using the provided intermediate flat washer, thrust washer, and positioning washer, and with a first rotating ring provided on the outer ring of the thrust washer and a second rotating ring provided on the outer ring of the positioning washer, effective positioning of the two bearings can be achieved. As a result, when the gripper and the connecting shaft rotate, vertical displacement relative to the rotating fixed seat will not occur. At the same time, when the rotating outer ring rotates relative to the fixed inner ring through a plurality of balls, the first rotating ring on the outer ring of the thrust washer and the second rotating ring on the outer ring of the positioning washer can rotate along with the rotating outer rings on both sides. Since the other side of the second rotating ring is not in contact with the rotating fixed seat, the friction can be reduced, wear can be minimized, and the service life of the rotating mechanism can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is an exploded view of the present utility model;

[0017] Figure 3 is a partial structural cross-sectional view of the present utility model;

[0018] Figure 4 This is a schematic structural diagram of the rotating structure of the present utility model.

[0019] In the figure: 1. Rotating fixed seat; 11. Mounting hole; 2. Rotating structure; 21. Connecting shaft; 22. Rotating member; 221. Intermediate flat washer; 222. Thrust washer; 2221. First rotating ring; 2222. First positioning ring; 223. Positioning washer; 2231. Second rotating ring; 2232. Second positioning ring; 224. Bearing; 2241. Fixed inner ring; 2242. Rotating outer ring; 2243. Ball; 3. Jaw; 31. Shaft hole. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] An embodiment of the present utility model discloses a clamping arm rotating mechanism. According to the attached Figures 1-4 As shown in the figure, it includes a rotating fixed seat 1. The rotating fixed seat 1 is provided with a plurality of through mounting holes 11. The mounting hole 11 is connected to a rotating structure 2, and the rotating fixed seat 1 is connected to a jaw 3 through the rotating structure 2. The end of the jaw 3 is provided with a shaft hole 31;

[0022] The rotating structure 2 includes a connecting shaft 21 and a rotating member 22. The rotating member 22 is sleeved on the end of the connecting shaft 21, and the outer side of the rotating member 22 is in contact with the inner wall of the shaft hole 31.

[0023] Furthermore, the rotating member 22 includes an intermediate flat washer 221, a thrust washer 222, and a positioning washer 223. Bearings 224 are provided between the intermediate flat washer 221 and the thrust washer 222 and between the intermediate flat washer 221 and the positioning washer 223. The other sides of the thrust washer 222 and the positioning washer 223 are in close contact with the end of the connecting shaft 21 and the rotating fixed seat 1 respectively.

[0024] Furthermore, the bearing 224 includes a fixed inner ring 2241 and a rotating outer ring 2242. The inner wall of the fixed inner ring 2241 is in contact with the outer side of the connecting shaft 21, and the rotating outer ring 2242 is located outside the fixed inner ring 2241. The outer ring of the rotating outer ring 2242 is in interference fit with the inner wall of the shaft hole 31.

[0025] Furthermore, a plurality of balls 2243 are provided between the fixed inner ring 2241 and the rotating outer ring 2242.

[0026] Further, a first rotating ring 2221 is provided on the outer ring of the thrust washer 222. A first positioning ring 2222 is fixedly installed on the inner ring of the first rotating ring 2221, and the first positioning ring 2222 is rotatably arranged inside the first rotating ring 2221.

[0027] Further, the side surface of the first rotating ring 2221 is in close contact with one of the rotating outer rings 2242.

[0028] Further, a second rotating ring 2231 is provided on the outer ring of the positioning washer 223. A second positioning ring 2232 is fixedly installed on the inner ring of the second rotating ring 2231, and the second positioning ring 2232 is rotatably arranged inside the second rotating ring 2231.

[0029] Further, one side of the second rotating ring 2231 is in close contact with the other rotating outer ring 2242, and the other side of the second rotating ring 2231 is not in contact with the rotary fixing base 1.

[0030] During use, by using the provided intermediate flat washer 221, thrust washer 222 and positioning washer 223, and with a first rotating ring 2221 provided on the outer ring of the thrust washer 222 and a second rotating ring 2231 provided on the outer ring of the positioning washer 223, an effective positioning function can be achieved for the two bearings 224, so that when the jaw 3 and the connecting shaft 21 rotate, they will not undergo vertical displacement relative to the rotary fixing base 1. At the same time, when the rotating outer ring 2242 rotates relative to the fixed inner ring 2241 through a plurality of balls 2243, the first rotating ring 2221 on the outer ring of the thrust washer 222 and the second rotating ring 2231 on the outer ring of the positioning washer 223 can rotate along with the rotating outer rings 2242 on both sides, and the other side of the second rotating ring 2231 is not in contact with the rotary fixing base 1, thereby reducing friction, minimizing wear, and increasing the service life of the rotating mechanism.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping arm rotating mechanism, comprising a rotating fixed seat (1), characterized in that, The rotating fixing base (1) is provided with a plurality of through mounting holes (11). The mounting holes (11) are connected with a rotating structure (2), and the rotating fixing base (1) is connected with a clamping jaw (3) through the rotating structure (2). A shaft hole (31) is formed at the end of the clamping jaw (3). The rotating structure (2) includes a connecting shaft (21) and a rotating member (22). The rotating member (22) is sleeved at the end of the connecting shaft (21), and the outer side of the rotating member (22) is in fit with the inner wall of the shaft hole (31).

2. The open clip arm rotating mechanism according to claim 1, wherein The rotating member (22) includes an intermediate flat washer (221), a thrust washer (222) and a positioning washer (223). Bearings (224) are arranged between the intermediate flat washer (221) and the thrust washer (222) and between the intermediate flat washer (221) and the positioning washer (223). The other sides of the thrust washer (222) and the positioning washer (223) are respectively in close contact with the end of the connecting shaft (21) and the rotating fixing base (1).

3. The open clip arm rotating mechanism according to claim 2, wherein, The bearing (224) includes a fixed inner ring (2241) and a rotating outer ring (2242). The inner wall of the fixed inner ring (2241) is in fit with the outer side of the connecting shaft (21). The rotating outer ring (2242) is located outside the fixed inner ring (2241), and the outer ring of the rotating outer ring (2242) is in interference fit with the inner wall of the shaft hole (31).

4. The open clip arm rotating mechanism according to claim 3, characterized in that, A plurality of balls (2243) are arranged between the fixed inner ring (2241) and the rotating outer ring (2242).

5. The open clip arm rotating mechanism according to claim 3, characterized in that, A first rotating ring (2221) is arranged on the outer ring of the thrust washer (222). A first positioning ring (2222) is fixedly installed on the inner ring of the first rotating ring (2221), and the first positioning ring (2222) is rotatably arranged inside the first rotating ring (2221).

6. The open clip arm rotating mechanism according to claim 5, characterized in that, The side surface of the first rotating ring (2221) is in close contact with one of the rotating outer rings (2242).

7. The open clip arm rotating mechanism according to claim 3, characterized in that, A second rotating ring (2231) is arranged on the outer ring of the positioning washer (223). A second positioning ring (2232) is fixedly installed on the inner ring of the second rotating ring (2231), and the second positioning ring (2232) is rotatably arranged inside the second rotating ring (2231).

8. The open clip arm rotating mechanism according to claim 7, characterized in that, One side of the second rotating ring (2231) is in close contact with the other rotating outer ring (2242), and the other side of the second rotating ring (2231) is not in contact with the rotating fixing base (1).

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