A clamping device

Abstract

The utility model relates to the pneumatic field especially relates to a clamping device that operation is more stable, is provided with first end portion through guide rail, first end portion has the installation groove, and the wall surface of the peripheral lateral wall of installation groove is continuous closed ring surface, and has the retaining wall between installation groove and accommodation groove, realized the isolation of installation groove and outside, and the isolation of installation groove and accommodation groove, compared with background art, can reduce the possibility that the sundries enter installation groove, guarantee transmission portion's operation stability, and then improved the stability of clamping device operation.

Description

Technical Field

[0001] This utility model relates to the field of pneumatics, and in particular to a clamping device. Background Technology

[0002] See Figure 6 and Figure 7 A clamping device includes a cylinder 1' and a clamping assembly 2'. The cylinder 1' includes a cylinder body 11' and a piston assembly 12', which is slidable relative to the cylinder body 11'. The clamping assembly 2' includes a guide rail 21', a gripper 22', and a transmission member 23'. The guide rail 21' is disposed at the end of the cylinder body 11', and the gripper 22' is slidably engaged with the guide rail 21'. The end of the cylinder body 11' has a mounting groove 111', and a portion of the transmission member 23' is located within the mounting groove 111'. The piston assembly 12' is drively connected to the gripper 22' via the transmission member 23'. The outer wall of the cylinder body 11' also has a receiving groove 112', which extends along the sliding direction of the piston assembly 12', and one end of the receiving groove 112' passes through the mounting groove 111'. In some exemplary applications, the receiving groove 112' can be used to accommodate a sensor. In this technology, since the receiving groove 112' and the mounting groove 111' are connected, debris can easily enter the mounting groove 111', affecting the stability of the clamping device. Utility Model Content

[0003] This invention provides a clamping device that solves the above-mentioned operational stability problem.

[0004] A clamping device includes a cylinder and a clamping assembly. The cylinder includes a cylinder body and a piston assembly. The piston assembly includes a piston rod, which is movable relative to the cylinder body in a first direction. The clamping assembly includes a guide rail, a gripper, and a transmission part. Along the first direction, the cylinder body has a first end, and the guide rail is disposed at the first end. The gripper slides with the guide rail and is movable relative to the cylinder body along the guide rail. The direction in which the gripper slides relative to the cylinder body along the guide rail is defined as a second direction. The piston rod is drivenly connected to the transmission part, and the transmission part is drivenly connected to the gripper. The first end has a mounting groove, and the wall surface of the peripheral sidewall of the mounting groove is a continuous closed annular surface. At least a portion of the transmission part is located inside the mounting groove. Along the second direction, the cylinder body has two opposing first sidewalls, and at least one first sidewall is provided with a receiving groove. The receiving groove extends along the first direction, and a baffle is provided between the mounting groove and the receiving groove along the first direction.

[0005] The clamping device of this application is set at the first end via a guide rail. The first end has a mounting groove. The wall surface of the mounting groove is a continuous closed annular surface, and there is a baffle between the mounting groove and the receiving groove, which realizes the isolation between the mounting groove and the outside world, as well as the isolation between the mounting groove and the receiving groove. Compared with the prior art, it can reduce the possibility of foreign objects entering the mounting groove, ensure the operational stability of the transmission part, and thus improve the operational stability of the clamping device. Attached Figure Description

[0006] Figure 1 This is a schematic cross-sectional view of one embodiment of the clamping device provided by this utility model.

[0007] Figure 2 yes Figure 1 A three-dimensional schematic diagram of one embodiment of the clamping device.

[0008] Figure 3 yes Figure 1 A perspective view of the cylinder body of one embodiment of the clamping device.

[0009] Figure 4 yes Figure 1 A perspective view of the cylinder body of one embodiment of the clamping device from another angle.

[0010] Figure 5 yes Figure 1 A perspective view of the guide rail of one embodiment of the clamping device.

[0011] Figure 6 This is a schematic cross-sectional view of the clamping device in the background technology.

[0012] Figure 7 This is a three-dimensional schematic diagram of the clamping device in the background technology.

[0013] Figure label: 1. Cylinder; 11. Cylinder block; 111. Piston chamber; 112. First end; 1121. First end face; 1122. First locating pin hole; 113. Mounting groove; 114. First side wall; 115. Receiving groove; 1151. Notch; 116. Baffle; 1161. First wall surface; 1162. Second wall surface; 117. Third end; 12. Piston assembly; 121. Piston; 122. Piston rod; 2. Clamping components; 21. Guide rail; 211. Second end; 2111. Second end face; 2112. Groove; 2113. Second locating pin hole; 212. Second sidewall; 22. Gripper; 23. Transmission section; 231. First section; 2311. First free end; 232. Second section; 2321. Second free end; 24. Connecting shaft; 25. Sealing components; 1', Cylinder; 11', Cylinder block; 111', Mounting slot; 112', Receiving slot; 12' Piston assembly; 2' Clamping assembly; 21', guide rail; 22', Gripper; 23', Transmission components. Detailed Implementation

[0014] To make the objectives and advantages of this utility model clearer, embodiments of this utility model will be described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0015] The technical solution of the specific embodiments is described below with reference to the accompanying drawings: See Figures 1-5 This utility model provides a clamping device, including a cylinder 1 and a clamping assembly 2. The cylinder 1 includes a cylinder body 11 and a piston assembly 12. The cylinder body 11 has a piston chamber 111. The piston assembly 12 includes a piston 121 and a piston rod 122. The piston 121 is located in the piston chamber 111. The piston rod 122 is fixedly connected to the piston 121. The direction in which the piston 121 moves along the piston chamber 111 is defined as a first direction. The piston 121 can drive the piston rod 122 to move relative to the cylinder body 11 along the first direction.

[0016] The clamping assembly 2 includes a guide rail 21, a gripper 22, and a transmission part 23. Along a first direction, the cylinder body 11 has a first end 112, the guide rail 21 is disposed at the first end 112, the gripper 22 is slidably engaged with the guide rail 21, the direction in which the gripper 22 slides along the guide rail 21 is defined as a second direction, the gripper 22 can move relative to the cylinder body 11 along the second direction, the first end 112 has a mounting groove 113, the mounting groove 113 extends along the first direction, at least a portion of the transmission part 23 is located inside the mounting groove 113, the piston rod 122 is throttle connected to the transmission part 23, and the transmission part 23 is throttle connected to the gripper 22.

[0017] In some embodiments, see Figure 1The transmission unit 23 adopts a crank design and is pivotally connected to the peripheral wall of the mounting groove 113 via a connecting shaft 24. The transmission unit 23 includes a first segment 231 and a second segment 232, which are fixedly connected and form an angle, thus creating a crank structure. The first segment 231 has a first free end 2311, and the second segment 232 has a second free end 2321. The first free end 2311 is connected to the piston rod 122, and the second free end 2321 is connected to the gripper 22. When the piston 121 drives the piston rod 122 to move in the first direction, the piston rod 122 drives the transmission unit 23 to rotate around the axis of the connecting shaft 24, and the transmission unit 23 then drives the gripper 22 to move in the second direction.

[0018] See Figures 1-4 The peripheral sidewall of the mounting groove 113 is a continuous closed annular surface. Along the second direction, the cylinder body 11 has two opposing first sidewalls 114, at least one of which is provided with a receiving groove 115. In some exemplary applications, the receiving groove 115 can be used to accommodate a sensor magnetically coupled to the piston assembly 12, which can be used to detect the real-time position of the piston assembly 12 in the first direction, thereby ensuring stable and reliable operation of the clamping device. The receiving groove 115 extends along the first direction, and along the first direction, a baffle 116 is provided between the mounting groove 113 and the receiving groove 115 to isolate them.

[0019] Due to the complex working environment of the clamping device, in the prior art, dust and other debris can easily enter the mounting groove 113, causing the transmission part 23 to jam, making it difficult for the clamping device to maintain stable and reliable operation. The clamping device of this application is mounted on the first end 112 via a guide rail 21. The first end 112 has a mounting groove 113, the peripheral sidewall of which is a continuous closed annular surface. Furthermore, a baffle 116 is provided between the mounting groove 113 and the receiving groove 115, achieving isolation between the mounting groove 113 and the outside environment, as well as isolation between the mounting groove 113 and the receiving groove 115. Compared to the prior art, this reduces the possibility of debris entering the mounting groove 113, ensures the operational stability of the transmission part 23, and thus improves the operational stability of the clamping device.

[0020] See Figure 1 Along the first direction, the baffle 116 has two opposing walls, namely a first wall 1161 and a second wall 1162. The first wall 1161 is at least part of the bottom wall of the mounting groove 113, and the second wall 1162 is the end side wall of the receiving groove 115. This can effectively isolate the mounting groove 113 and the receiving groove 115, preventing impurities from entering the mounting groove 113 through the receiving groove 115, and can also effectively simplify the structure of the cylinder body 11 and reduce the processing cost.

[0021] In some embodiments, see Figure 1and Figure 3 The first end 112 has a first end face 1121, the plane of which is perpendicular to the first direction, which helps to improve the operational reliability of the clamping device. During machining, the first end face 1121 should be precision machined to ensure its flatness and perpendicularity, thereby improving the installation accuracy of the clamping assembly 2. The mounting groove 113 is recessed relative to the first end face 1121. Along the first direction, the guide rail 21 has a second end 211 opposite to the first end 112, at least a portion of which is in contact with the first end face 1121. By having at least a portion of the guide rail 21 in contact with the first end face 1121, debris can be prevented from entering the mounting groove 113 from the gap between the guide rail 21 and the cylinder 11, further improving the operational stability of the clamping device.

[0022] See Figures 1-3 and Figure 5 The second end 211 has a second end face 2111 and a groove 2112. At least a portion of the second end face 2111 is in contact with the first end face 1121. The first end face 1121 is provided with a first positioning pin hole 1122. The second end face 2111 is provided with a second positioning pin hole 2113 corresponding to the first positioning pin hole 1122. When the guide rail 21 is assembled to the cylinder body 11, by passing a positioning pin (not marked in the figure) through the first positioning pin hole 1122 and the second positioning pin hole 2113, the undesirable deviation of the relative position between the guide rail 21 and the cylinder body 11 can be prevented, thereby improving the assembly accuracy.

[0023] The groove 2112 is recessed relative to the second end face 2111. The second end face 2111 requires precision grinding during machining to ensure that it can fit tightly against the first end face 1121. By setting the groove 2112 recessed relative to the second end face 2111, the area of ​​the second end face 2111 that needs precision grinding can be reduced, the difficulty of precision machining of the second end face 2111 can be reduced, thereby saving precision grinding time and improving machining efficiency.

[0024] To further reduce the finishing difficulty of the second end face 2111 and improve the machining efficiency, the groove 2112 extends along the first direction, and along the second direction, the guide rail 21 has two opposing second sidewalls 212. Along the second direction, the end of the groove 2112 extends to at least one of the two second sidewalls 212.

[0025] See Figure 2The clamping assembly 2 has a seal 25 located between the bottom wall of the groove 2112 and the first end face 1121, and along the second direction, the seal 25 is located at the end of the groove 2112. In some harsh environments, the environment around the clamping device contains relatively many impurities. Due to the presence of the groove 2112, impurities may enter the mounting groove 113 from the end of the groove 2112. By providing a seal 25 at the end of the groove 2112, impurities can be prevented from entering the mounting groove 113 from the end of the groove 2112, thereby improving the stability of the clamping device operation.

[0026] In some embodiments, see Figure 4 At least a portion of the peripheral sidewall of the receiving groove 115 is circular in the projection of the first direction. In this way, the receiving groove 115 can be adapted to commonly used circular sensors. Users can install the circular sensor into the receiving groove 115 without the need for tools, making installation and use more convenient.

[0027] See Figures 1-4 Along a first direction, the cylinder body 11 has a third end 117 opposite to the first end 112. A receiving groove 115 extends through the third end 117, allowing the user to insert a sensor into the receiving groove 115 via the third end 117 and fix the sensor to a suitable position in the mounting groove 113 as needed. The receiving groove 115 has a notch 1151 extending along the first direction and extending through the third end 117. Along a second direction, the notch 1151 extends through a corresponding first sidewall 114. In some exemplary applications, certain sensors may be equipped with signal lines. By providing the notch 1151, the sensor's signal lines can be easily led out from the receiving groove 115, improving ease of use.

[0028] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A clamping device, comprising a cylinder and a clamping assembly, the cylinder comprising a cylinder body and a piston assembly, the piston assembly comprising a piston rod, the piston rod being movable relative to the cylinder body along a first direction, the clamping assembly comprising a guide rail, a gripper, and a transmission part, wherein along the first direction, the cylinder body has a first end, the guide rail is disposed at the first end, the gripper is slidably engaged with the guide rail, the gripper being slidable relative to the cylinder body along the guide rail, the direction in which the gripper slides relative to the cylinder body along the guide rail is defined as a second direction; the piston rod is drive-connected to the transmission part, the transmission part is drive-connected to the gripper, characterized in that: The first end has a mounting groove, the wall surface of the peripheral sidewall of the mounting groove is a continuous closed annular surface, at least part of the transmission part is located inside the mounting groove, along the second direction, the cylinder has two opposing first sidewalls, at least one of the first sidewalls is provided with a receiving groove, the receiving groove extends along the first direction, along the first direction, there is a baffle between the mounting groove and the receiving groove.

2. The clamping device according to claim 1, characterized in that: Along the first direction, the baffle has two opposing wall surfaces, one of which is at least a portion of the bottom wall of the mounting groove, and the other of which is the end side wall of the receiving groove.

3. The clamping device according to claim 1, characterized in that: The first end has a first end face, the mounting groove is recessed relative to the first end face, and along the first direction, the guide rail has a second end opposite to the first end, at least a portion of the second end abutting the first end face.

4. The clamping device according to claim 3, characterized in that: The plane containing the first end face is perpendicular to the first direction.

5. The clamping device according to claim 3 or 4, characterized in that: The second end has a second end face and a groove, at least a portion of the second end face is in contact with the first end face, and the groove is recessed relative to the second end face.

6. The clamping device according to claim 5, characterized in that: The groove extends along the first direction, and along the second direction, the guide rail has two opposing second sidewalls, and along the second direction, the end of the groove extends to at least one of the two second sidewalls.

7. The clamping device according to claim 6, characterized in that: The clamping assembly has a seal located between the bottom wall of the groove and the first end face, and along the second direction, the seal is located at the end of the groove.

8. The clamping device according to claim 5, characterized in that: The first end face is provided with a first positioning pin hole, and the second end face is provided with a second positioning pin hole corresponding to the first positioning pin hole.

9. The clamping device according to claim 1, characterized in that: At least a portion of the peripheral sidewall of the receiving groove has a circular projection in the first direction.

10. The clamping device according to claim 1 or 9, characterized in that: Along the first direction, the cylinder body has a third end opposite to the first end, the receiving groove extends through the third end, the receiving groove has a notch extending along the first direction and extending through the third end, and along the second direction, the notch extends through the first sidewall.

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