Tightening gun clamping device

Abstract

A tightening gun clamping device comprises a clamping body which is of a cuboid structure, a central shaft hole is formed in the middle of the clamping body in the horizontal direction, a plurality of containing grooves are formed in the inner wall of the central shaft hole in the circumferential direction, rolling bearings are arranged in the containing grooves through rotating shafts, and one side face of the outer ring of each rolling bearing protrudes out of the inner wall of the central shaft hole; a supporting block is arranged in the center of the top face of the clamping body in a protruding mode. Two connecting blocks are symmetrically and convexly arranged in the center of the bottom surface of the flange plate, shaft holes are formed in the centers of the connecting blocks, and the connecting blocks are pivotally connected to the supporting blocks of the clamping body through connecting shafts; the hollow rotating shaft is inserted into the central shaft hole of the clamping body, and the outer circular surface of the hollow rotating shaft is in rolling friction contact with the rolling bearing; a connecting plate is arranged at the front end of the hollow rotating shaft; the tightening gun is inserted into the hollow rotating shaft, and the front portion of the tightening gun is connected with the connecting plate.

Description

Technical Field

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

[0002] In the assembly of passenger vehicles, a large number of bolts require tightening torque in the range of 100 to 600 Nm. Directly hand-held tightening guns cannot provide the corresponding reaction force, so the tightening guns need to be fixed on anti-torsion robotic arms, which provide spatial freedom of movement.

[0003] Existing tightening gun clamping devices rotate around the gun body as an axis. Due to space constraints, they mostly use sliding bearings or needle roller bearings without inner or outer rings. Both have drawbacks: sliding bearings have high rotational resistance, making it difficult for operators to operate and sometimes even impossible to turn; needle roller bearings without inner or outer rings have poor durability under these conditions, are easily damaged, affect efficiency, and increase maintenance costs. Summary of the Invention

[0004] The purpose of this utility model is to provide a tightening gun clamping device for connecting a tightening gun and an anti-torsion robotic arm, which can effectively release the rotational degree of freedom in the direction other than the tightening axis while transmitting the torsional reaction force to the anti-torsion robotic arm; and solve the contradiction between the rotational smoothness and space limitation of the existing clamping device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A tightening gun clamping device, comprising,

[0007] The clamping body is a cuboid structure with a central shaft hole in the middle along the horizontal direction. Several receiving grooves are provided on the inner wall of the central shaft hole along the circumference. Rolling bearings are installed in the receiving grooves through a rotating shaft. One side of the outer ring of the rolling bearing protrudes from the inner wall of the central shaft hole. A support block is protruding from the center of the top surface of the clamping body, and a shaft hole is provided in the center of the support block.

[0008] The flange has two symmetrically protruding connecting blocks on the center of its bottom surface. The connecting blocks have shaft holes in the center and are pivotally connected to the support block of the clamping body through connecting shafts.

[0009] A hollow rotating shaft is inserted into the central shaft hole of the clamping body, and its outer circular surface is in rolling friction contact with the rolling bearing; a connecting plate is provided at the front end of the hollow rotating shaft; a tightening gun is inserted into the hollow rotating shaft, and the front part of the tightening gun is connected to the connecting plate.

[0010] Furthermore, the inner wall of the central shaft hole of the clamping body is provided with four sets of receiving grooves along the circumferential direction. Each set of receiving grooves is provided with at least two receiving grooves at intervals along the axial direction of the central shaft hole, and rolling bearings are provided in the receiving grooves.

[0011] Furthermore, the front end of the hollow rotating shaft is provided with an annular limiting groove, and correspondingly, the rear side of the support block that holds the body is provided with a rolling bearing inserted into the annular limiting groove.

[0012] Furthermore, the front end face of the clamping body has a groove along the circumferential direction at the central shaft hole port, and a clamp matching the hollow rotating shaft is installed inside it.

[0013] Preferably, the front end face of the clamping body is provided with a limiting plate, the limiting plate is provided with a central hole corresponding to the central shaft hole, and the inner edge of the central hole is provided with an arc-shaped protrusion along the circumferential direction. Correspondingly, the rear end face of the hollow rotating shaft is provided with a limiting protrusion that cooperates with and interferes with the arc-shaped protrusion.

[0014] Preferably, a U-shaped swing limiting plate is also provided, which is sleeved on the support block of the clamping body and connected by screws; the bottom of the swing limiting plate corresponding to the front end face of the support block is provided with a through hole and an adjusting bolt.

[0015] Preferably, the front end face and rear end face of the clamping body are respectively provided with end plates, and the center of the end plate is provided with a through hole corresponding to the central shaft hole.

[0016] Preferably, the accommodating groove on the clamping body has a hollow structure, and its outer side is provided with a cover plate.

[0017] This utility model designs a hollow rotating shaft that is fitted with rolling bearings fixed around the clamping body. The bearings are tangent to the outer circular surface of the hollow rotating shaft, which serves to limit the radial rotation of the shaft and provide rolling friction support for its rotation.

[0018] Preferably, the rear end of the clamping body is provided with a bearing that extends into the annular limiting groove at the front end of the hollow rotating shaft, which serves to restrict the axial rotation of the rotating shaft and further provides rolling friction support for its rotation.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] This invention achieves a space-saving solution by using a hollow rotating shaft and rolling bearings in a reasonable spatial arrangement, without increasing the space occupied compared to existing technologies. At the same time, it provides rolling friction support for the rotating shaft in a relatively reliable and durable manner, significantly improving the smoothness and ease of use of the device.

[0021] This invention makes innovative improvements to the rotating structure with the tightening gun body as the axis, avoiding the problems of high rotational resistance or short-lasting roller bearings in existing tightening guns. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0023] Figure 2Three-dimensional breakdown of the embodiments of this utility model Figure 1 ;

[0024] Figure 3 Three-dimensional breakdown of the embodiments of this utility model Figure 2 ;

[0025] Figure 4 This is a perspective view of the clamping body in an embodiment of the present utility model;

[0026] Figure 5 Three-dimensional breakdown of the clamping body in the embodiments of this utility model Figure 1 ;

[0027] Figure 6 Three-dimensional breakdown of the clamping body in the embodiments of this utility model Figure 2 . Detailed Implementation

[0028] See Figures 1-6 The tightening gun clamping device of this utility model includes,

[0029] The clamping body 1 is a cuboid structure with a central shaft hole 101 in the middle along the horizontal direction. Several accommodating grooves 102 are arranged circumferentially on the inner wall of the central shaft hole 101. A rolling bearing 2 is arranged in the accommodating groove 102 through a rotating shaft. One side of the outer ring of the rolling bearing 2 protrudes from the inner wall of the central shaft hole 101. A support block 103 is protruding from the center of the top surface of the clamping body 1, and a shaft hole is provided in the center of the support block 103.

[0030] The flange 3 has two symmetrically protruding connecting blocks 31 on the center of its bottom surface. The connecting blocks 31 have shaft holes in the center and are pivotally connected to the support block 103 of the clamping body 1 through the connecting shaft 32. The clamping device is connected to the anti-torsion robotic arm through the flange 3.

[0031] A hollow rotating shaft 4 is inserted into the central shaft hole 101 of the clamping body 1, and its outer circular surface is in rolling friction contact with the rolling bearing 2; a connecting plate 5 is provided at the front end of the hollow rotating shaft 4; a tightening gun 100 is inserted into the hollow rotating shaft 4, and the front part of the tightening gun 100 is connected to the connecting plate 5.

[0032] Furthermore, the inner wall of the central shaft hole 101 of the clamping body 1 is provided with four sets of receiving grooves 102 along the circumferential direction. Each set of receiving grooves 102 is provided with at least two receiving grooves at intervals along the axial direction of the central shaft hole 101, and a rolling bearing 2 is provided in the receiving groove.

[0033] Furthermore, the front end of the hollow rotating shaft 4 is provided with an annular limiting groove 41, and correspondingly, the rear side of the support block 103 that holds the body 1 is provided with a rolling bearing 6 inserted into the annular limiting groove 41.

[0034] Furthermore, the front end face of the clamping body 1 has a groove 104 along the circumferential direction at the central shaft hole 101 port, and a clamp 7 matching the hollow rotating shaft is provided inside it.

[0035] Preferably, the front end face of the clamping body 1 is provided with a limiting plate 8, the limiting plate 8 is provided with a central hole 81 corresponding to the central shaft hole 101, and the inner edge of the central hole 81 is provided with an arc-shaped protrusion 82 along the circumferential direction. Correspondingly, the rear end face of the hollow rotating shaft 4 is provided with a limiting protrusion 42 that cooperates with and interferes with the arc-shaped protrusion 82.

[0036] Preferably, a U-shaped swing limiting plate 9 is also provided. The swing limiting plate 9 is sleeved on the support block 103 of the clamping body 1 and connected by screws. The bottom of the swing limiting plate 9 corresponding to the front end face of the support block 103 is provided with a through hole and an adjusting bolt 10. The adjusting bolt 10 can abut against the support block 103 to control the amplitude.

[0037] Preferably, the front end face and rear end face of the clamping body 1 are respectively provided with end plates 11 and 11', and the center of the end plates 11 and 11' is provided with a through hole corresponding to the central shaft hole 101.

[0038] Preferably, the accommodating groove 102 on the clamping body 1 has a hollow structure, and its outer side is provided with a cover plate 105.

Claims

1. A tightening gun clamping device, characterized in that, include, The clamping body is a cuboid structure with a central shaft hole in the middle along the horizontal direction. Several receiving grooves are provided on the inner wall of the central shaft hole along the circumference. Rolling bearings are installed in the receiving grooves through a rotating shaft. One side of the outer ring of the rolling bearing protrudes from the inner wall of the central shaft hole. A support block is protruding from the center of the top surface of the clamping body, and a shaft hole is provided in the center of the support block. The flange has two symmetrically protruding connecting blocks on the center of its bottom surface. The connecting blocks have shaft holes in the center and are pivotally connected to the support block of the clamping body through connecting shafts. A hollow rotating shaft is inserted into the central shaft hole of the clamping body, and its outer circular surface is in rolling friction contact with the rolling bearing; a connecting plate is provided at the front end of the hollow rotating shaft; a tightening gun is inserted into the hollow rotating shaft, and the front part of the tightening gun is connected to the connecting plate.

2. The tightening gun clamping device as described in claim 1, characterized in that, The inner wall of the central shaft hole of the clamping body is provided with four sets of receiving grooves along the circumferential direction. Each set of receiving grooves is provided with at least two receiving grooves at intervals along the axial direction of the central shaft hole, and rolling bearings are provided in the receiving grooves.

3. The tightening gun clamping device as described in claim 1 or 2, characterized in that, The front end of the hollow rotating shaft is provided with an annular limiting groove, and correspondingly, the rear side of the support block that holds the body is provided with a rolling bearing inserted into the annular limiting groove.

4. The tightening gun clamping device as described in claim 1, 2, or 3, characterized in that, The front end face of the clamping body has a groove along the circumferential direction at the central shaft hole port, and a clamp matching the hollow rotating shaft is installed inside it.

5. The tightening gun clamping device as described in claim 1, 2, 3, or 4, characterized in that, The front end face of the clamping body is provided with a limiting plate, which is provided with a central hole corresponding to the central shaft hole. The inner edge of the central hole is provided with an arc-shaped protrusion along the circumferential direction. Correspondingly, the rear end face of the hollow rotating shaft is provided with a limiting protrusion that cooperates with and interferes with the arc-shaped protrusion.

6. The tightening gun clamping device as described in claim 1, 2, 3, 4, or 5, characterized in that, A U-shaped swing limiting plate is also provided, which is sleeved on the support block of the clamping body and connected by screws; the bottom of the swing limiting plate corresponding to the front end face of the support block is provided with a through hole and an adjusting bolt.

7. The tightening gun clamping device as described in claim 1, 2, 3, 4, 5, or 6, characterized in that, The front and rear faces of the clamping body are respectively provided with end plates, and the center of the end plate is provided with a through hole corresponding to the central shaft hole.

8. The tightening gun clamping device as described in claim 1, 2, 3, 4, 5, 6, or 7, characterized in that, The accommodating groove on the clamping body has a hollow structure, and a cover plate is provided on its outer side.

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