A pneumatic gripper

Abstract

The utility model discloses a pneumatic clamp, which relates to a clamp, comprising: a plurality of clamping blocks movably mounted on a clamping jaw support and arranged in a circumferential array; a connecting rod movably arranged on the clamping jaw support and driven to move along a predetermined trajectory; and a connecting piece movably mounted on the connecting rod between the clamping blocks. The pneumatic clamp provided by the utility model has a simple structure, convenient and quick operation, and can realize self-centering of the clamped object during the closing process of the clamping blocks, thereby ensuring the purpose of uniform force in each radial direction when clamping or grabbing an object.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a pneumatic clamp. Background Art

[0002] Pneumatic grippers are actuators that use compressed air as power to clamp or grab workpieces. They are a common type of factory clamping tooling.

[0003] Referring to the disclosure (announcement) number: CN114714390A, the disclosure (announcement) date: 2022-07-08, a pneumatic clamp is disclosed, comprising a mounting seat and a shell mounted on the mounting seat, a first cavity and a second cavity connected to each other are provided in the shell, two clamping jaw assemblies are slidably installed in the first cavity, a piston assembly is installed in the second cavity, one end of the piston assembly protrudes out of the first cavity and is located between the two clamping jaw assemblies, and the piston assembly moves to drive the two clamping jaw assemblies to move closer to or away from each other; a first toothed portion is provided in the first cavity, and a second toothed portion meshing with the first toothed portion is provided on the clamping jaw assemblies, and the meshing of the first toothed portion and the second toothed portion is used to strengthen the connection between the two clamping jaw assemblies and the shell.

[0004] Based on the technology of the above-mentioned existing patents, the gripping execution component of the pneumatic gripper clamps the object through two relatively movable grippers. Due to structural limitations, it is impossible to ensure that the center of gravity of the clamped object is coaxial with the mid-vertical line of the pneumatic gripper during the clamping process. Therefore, it is easy to cause uneven force in all directions due to eccentric clamping. Utility Model Content

[0005] The purpose of the utility model is to provide a pneumatic clamping jaw to solve the above problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pneumatic gripper, comprising:

[0008] A plurality of clamping blocks movably mounted on the clamping jaw support and arranged in a circular array;

[0009] A connecting rod movably arranged on the clamping jaw support and driven to move along a predetermined trajectory;

[0010] A connecting piece movably mounted on the connecting rod between the clamping blocks.

[0011] As a preference, it further comprises a clamping rod, which is divided into a horizontal portion and a vertical portion according to the structure, and a flange bushing is provided at the junction of the horizontal portion and the vertical portion;

[0012] The clamping block is arranged on the vertical portion;

[0013] It also includes a pin shaft, which is plugged into the flange bushing to enable the clamping rod and the clamping claw support to be rotationally matched.

[0014] Preferably, the invention further comprises a base on which a cylinder is fixedly mounted, wherein the base is parallel to and coaxially arranged with the clamping jaw support and is assembled into one body through a support rod.

[0015] Preferably, it further comprises a connecting block having one end face fixedly connected to the connecting rod and the other end face connected to the cylinder output shaft, and the connecting rod is in sliding fit with a first bushing fixedly arranged on the clamping jaw support.

[0016] Preferably, pins are respectively inserted at both ends of the connecting piece, and the two pins are respectively inserted and rotationally engaged with flange bushings provided on the connecting rod and the horizontal portion of the clamping rod.

[0017] Preferably, there are two connecting pieces, which are arranged symmetrically about the center of the connecting rod and the clamping rod.

[0018] Preferably, the clamping block is an arc-shaped structure, and a plurality of the clamping blocks form a ring when in a clamping state.

[0019] Preferably, a protrusion is provided on the lower edge of the clamping surface of the clamping block, and the apex of the protrusion is chamfered.

[0020] In the above technical scheme, the pneumatic clamp provided by the utility model has the following beneficial effects: a plurality of clamping blocks arranged in a circular array are driven downwards and simultaneously toward the axis center, thereby realizing a self-centering function, so that the force in each radial direction is uniform when clamping or grasping objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a partial cross-sectional view of the utility model.

[0024] Description of reference numerals:

[0025] 1. Base; 2. Support rod; 3. Cylinder; 4. Connecting block; 5. Clamping jaw support; 6. First bushing; 7. Connecting rod; 8. Connecting plate; 9. Flange bushing; 11. Clamping block; 10. Clamping rod; 12. Pin shaft. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-2 As shown, a pneumatic gripper comprises:

[0028] A plurality of clamping blocks 11 movably mounted on the clamping jaw support 5 and arranged in a circular array;

[0029] A connecting rod 7 movably arranged on the clamping jaw support 5 and driven to move along a predetermined trajectory;

[0030] The connecting piece 8 of the connecting rod 7 is movably mounted between the clamping blocks 11.

[0031] Specifically, in the above embodiment, multiple clamping blocks 11 are arranged in a circular array, so when the connecting rod 7 is driven to move, the clamping blocks 11 will be driven to move under the connecting action of the connecting piece 8, and the trajectory of its movement can be to clamp along the horizontal direction toward the axis; or to deflect with a fixed point as the axis and thus clamp toward the axis; or any clamping assembly method known to technical personnel in this field.

[0032] Secondly, in the above embodiment, driving the connecting rod 7 to move along a predetermined trajectory can be achieved by a stepping screw motor, and the connecting rod 7 and the screw are threadedly matched, which are used to pull the connecting rod 7 up and down to pull the clamping block 11 to deflect with a fixed point as the axis center so as to move toward the axis center for clamping; or a fixed pulley group is used, and a common telescopic control element (such as an electric telescopic rod, a hydraulic oil telescopic rod, etc.) is used to control the pulling of the steel cable, so that the clamping block 11 moves toward the axis center in the horizontal direction for clamping; or any driving method known to technical personnel in this field is acceptable.

[0033] Furthermore, the number of the plurality of clamping blocks 11 in the above embodiment is at least three, while the clamping block 11 in this embodiment may be cylindrical, rectangular or other shapes to fit the outer contour of the object being transported, which will not be described in detail again.

[0034] In the above technology, the plurality of clamping blocks 11 arranged in a circular array are driven downward and simultaneously directed toward the axis, thereby realizing a self-centering function, so that the force in each radial direction is uniform when clamping or grasping an object.

[0035] As an embodiment further provided by the utility model, it also includes a clamping rod 10, which is divided into a horizontal part and a vertical part according to the structure, and a flange bushing 9 is provided at the junction of the horizontal part and the vertical part;

[0036] The clamping block 11 is arranged on the vertical portion;

[0037] It also includes a pin shaft 12 which is plugged into the flange bushing 9 so that the clamping rod 10 and the clamping jaw support 5 are rotationally matched.

[0038] Specifically, the pin shaft 12 and the flange bushing 9 in the embodiment are full fit, and the pin shaft 12 and the flange bushing 9 form a bearing-like effect. When the connecting rod 7 is driven to move, the clamping block 11 is driven to move under the connection of the connecting piece 8, and the clamping rod 10 deflects with the flange bushing 9 provided at the junction of the horizontal part and the vertical part as the fixed point and moves toward the axis to clamp.

[0039] As another embodiment further provided by the utility model, it also includes a base 1 on which a cylinder 3 is fixedly installed. The base 1 is parallel to and coaxially arranged with the clamping jaw support 5 and is assembled into one body through the support rod 2.

[0040] Secondly, the embodiment further comprises a connecting block 4 having one end surface fixedly connected to the connecting rod 7 and the other end surface connected to the output shaft of the cylinder 3, and the connecting rod 7 is in sliding fit with a first bushing 6 fixedly arranged on the clamping jaw support 5.

[0041] Furthermore, pins 12 are respectively inserted at both ends of the connecting piece 8, and the two pins 12 are respectively inserted and rotationally matched with the flange bushings 9 provided on the horizontal parts of the connecting rod 7 and the clamping rod 10.

[0042] Specifically, in this embodiment, the pin 12 and the flange bushing 9 are full fit, and the combination of the two forms an effect similar to a sliding bearing. When the cylinder 3 is extended or retracted, it will pull the connecting rod 7 to Figure 1 The clamping rod 10 moves up and down in the direction shown, thereby pulling and causing the clamping rod 10 to deflect with the flange bushing 9 provided at the junction of the horizontal part and the vertical part as the fixed point and move toward the axis to clamp.

[0043] It should be noted that in the above embodiment, the number of the connecting pieces 8 is two, and they are arranged symmetrically about the center of the connecting rod 7 and the clamping rod 10 .

[0044] As another embodiment further provided by the present invention, the clamping block 11 is an arc-shaped structure, and a plurality of clamping blocks 11 form a ring in the clamping state.

[0045] Specifically, in the above embodiment, the clamping block 11 is an arc-shaped structure, and can form a ring in the clamping state, thereby clamping an object with a circular ring structure.

[0046] As another embodiment further provided by the present invention, a protrusion is provided on the lower edge of the clamping surface of the clamping block 11, and the vertex of the protrusion is chamfered.

[0047] Specifically, in the above embodiment, the added protrusion can provide soft release during the clamping process, that is, the protrusion can be a rubber pressure block to avoid damage to the clamped object caused by clamping.

[0048] Alternatively, the raised portion in the above embodiment is designed to support the bottom, that is, after clamping, the diameter of the formed ring is smaller than the diameter of the ring formed by the clamping block 11, so when the object is clamped by the clamping block 11, the object can sit on the raised portion.

[0049] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pneumatic gripper, characterized in that: include: A plurality of clamping blocks (11) movably mounted on the clamping jaw support (5) and arranged in a circular array; A connecting rod (7) movably arranged on the clamping jaw support (5) and driven to move along a predetermined trajectory; A connecting piece (8) movably mounted on the connecting rod (7) between the clamping blocks (11); Pins (12) are respectively inserted at both ends of the connecting piece (8), and the two pins (12) are respectively inserted and rotationally matched with flange bushings (9) arranged on the horizontal parts of the connecting rod (7) and the clamping rod (10).

2. A pneumatic gripper according to claim 1, characterized in that: It also includes a clamping rod (10), which is divided into a horizontal part and a vertical part according to the structure, and a flange bushing (9) is provided at the junction of the horizontal part and the vertical part; The clamping block (11) is arranged on the vertical portion; It also includes a pin shaft (12) which is plugged into the flange bushing (9) so that the clamping rod (10) and the clamping claw support (5) are rotationally matched.

3. A pneumatic gripper according to claim 2, characterized in that: It also comprises a base (1) on which a cylinder (3) is fixedly arranged, wherein the base (1) is parallel to and coaxially arranged with the clamping jaw support (5) and is assembled into one body through a support rod (2).

4. A pneumatic gripper according to claim 3, characterized in that: It also includes a connecting block (4) having one end surface fixedly connected to a connecting rod (7) and the other end surface connected to an output shaft of the cylinder (3), and the connecting rod (7) is in sliding fit with a first bushing (6) fixedly arranged on the clamping jaw support (5).

5. A pneumatic gripper according to claim 1, characterized in that: The number of the connecting pieces (8) is two, and they are arranged symmetrically about the center of the connecting rod (7) and the clamping rod (10).

6. A pneumatic gripper according to claim 1, characterized in that: The clamping block (11) is an arc-shaped structure, and a plurality of the clamping blocks (11) form a circular ring when in a clamping state.

7. A pneumatic gripper according to claim 1, characterized in that: A protrusion is provided on the lower edge of the clamping surface of the clamping block (11), and the apex of the protrusion is chamfered.

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