A gripper for gripping the inner ring of a car wheel hub

Abstract

This utility model relates to the field of clamping technology, and in particular to a gripping clamp for the inner ring of an automobile wheel hub. It includes a base, a rotary cylinder, several transmission components, and several gripping claws. The rotary cylinder is fixedly connected to the base, and the output end of the rotary cylinder is connected to the input end of the transmission components. Each transmission component and gripping claw is paired with the other, and the output end of the transmission components is connected to the gripping claws. The rotary cylinder provides power for the gripping claws to close and clamp the wheel hub or to release the wheel hub. The gripping claws are located above the base. A single rotary cylinder drives a turntable, and the radial movement of all sliders is synchronously controlled via an arc-shaped moving hole, ensuring that the gripping claws close or open simultaneously, resulting in uniform clamping force.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a clamping fixture for gripping the inner ring of an automobile wheel hub. Background Technology

[0002] In automated production lines for automotive wheel hubs, pneumatic clamps are typically used to grip the inner ring of the wheel hub. Traditional clamps often employ multiple independent cylinders to drive the gripping claws, resulting in complex structures, poor synchronization, and high costs. Furthermore, multi-cylinder control can easily lead to uneven clamping force or delayed action. In addition, the transmission mechanism of existing clamps lacks effective guiding and limiting designs, making the slider prone to deviation or jamming, thus affecting clamping accuracy. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problems in the prior art where the clamps are mostly driven by multiple independent cylinders, resulting in complex structure, poor synchronization, high cost, uneven clamping force or action delay due to multiple cylinder control, and the lack of effective guidance and limit design in the transmission mechanism of the clamp, the slider is prone to deviation or jamming, which affects the clamping accuracy, a new type of car wheel hub inner ring gripping clamp is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a car wheel hub inner ring gripping clamp, including a base, a rotary cylinder, several transmission components and several gripping claws. The rotary cylinder and the base are fixedly connected. The output end of the rotary cylinder and the input end of the transmission components are connected in a transmission manner. The transmission components and gripping claws are paired one-to-one. The output end of the transmission components and the gripping claws are connected in a transmission manner. The rotary cylinder is used to provide power for the gripping claws to close and clamp the wheel hub or to release the wheel hub. The gripping claws are located above the base. A turntable is driven by a single rotary cylinder. The radial movement of all sliders is synchronously controlled through an arc-shaped moving hole to ensure that the gripping claws close or open at the same time and the clamping force is uniform.

[0005] To address the challenge of efficiently converting rotational motion into gripping action, a transmission assembly is further included, comprising a fixed rod, a slider, and a connecting rod. One end of the fixed rod is fixedly connected to the base, and the other end is rotatably connected to the gripper. One end of the connecting rod is rotatably connected to the slider, and the other end is rotatably connected to the gripper. A turntable is installed on the output end of the rotary cylinder. An arc-shaped moving hole is opened on the turntable. A guide rod that matches the moving hole is protruding from the bottom of the slider. The guide rod is located inside the moving hole. When the turntable rotates, it drives the guide rod located in the moving hole to move.

[0006] To address the issue of unstable and skewed slider movement, a further improvement is made by sliding the slider and base together, with a radially extending groove on the base and the slider positioned within the groove.

[0007] To address the issue of the slider connecting part easily wobbling or dislodging during movement, the slider further includes a connecting part protruding from its side. A limiting component for restricting the connecting part is arranged in the groove. The limiting component includes a pad and a pressure block. The pad is located below the connecting part, and the pressure block is located above the connecting part. The pad and the base are fixedly connected, and the pressure block and the pad are fixedly connected. A limiting cavity for accommodating the connecting part is formed between the pressure block and the pad. The limiting cavity extends radially along the base.

[0008] To address the issue of inconvenient fixture installation, the car wheel hub inner ring gripping fixture further includes a bracket, with the base bottom surface and the bracket being fixedly connected.

[0009] To address the difficulty of maintaining the cylinder inside the base, the base further includes a base base and a pressure plate, which are fixedly connected, and the rotary cylinder is arranged inside the base base.

[0010] The beneficial effects of this utility model are: the car wheel hub inner ring gripper provided by this utility model drives the turntable through a single rotary cylinder, and controls the radial movement of all sliders synchronously through the arc-shaped moving hole, so as to ensure that the gripping claws close or open at the same time and the clamping force is uniform. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is a utility model Figure 3 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the structure of the turntable and slider of this utility model.

[0013] In the diagram: 1. Base, 11. Slide groove, 12. Base, 13. Pressure plate, 2. Rotary cylinder, 3. Transmission assembly, 31. Fixed rod, 32. Slider, 321. Connecting part, 322. Guide rod, 33. Connecting rod, 4. Gripping claw, 5. Turntable, 51. Moving hole, 6. Limiting assembly, 61. Pad, 62. Pressure block, 7. Bracket. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0015] like Figure 1 This is a schematic diagram of the structure of this utility model. A car wheel hub inner ring gripping clamp includes a base 1, a rotary cylinder 2, several transmission components 3, and several gripping claws 4. The rotary cylinder 2 is fixedly connected to the base 1. The output end of the rotary cylinder 2 is connected to the input end of the transmission components 3. The transmission components 3 and gripping claws 4 are paired one-to-one. The output end of the transmission components 3 is connected to the gripping claws 4. The rotary cylinder 2 provides power for the gripping claws 4 to close and grip the wheel hub or to release the wheel hub. The gripping claws 4 are located above the base 1. The rotary cylinder 2 drives the turntable, and the radial movement of all sliders 32 is synchronously controlled through the arc-shaped moving hole 51 to ensure that the gripping claws 4 close or open at the same time and the gripping force is uniform.

[0016] The wall surface of a car wheel hub that is close to the tire is called its inner ring, and the wall surface of the car wheel hub that is far from the tire is called the outer ring (i.e., the wall surface of the car wheel hub that is close to its center).

[0017] like Figure 1 , 3 As shown in Figure 5, the transmission assembly 3 includes a fixed rod 31, a slider 32, and a connecting rod 33. One end of the fixed rod 31 is fixedly connected to the base 1, and the other end is rotatably connected to the gripper 4. One end of the connecting rod 33 is rotatably connected to the slider 32, and the other end is rotatably connected to the gripper 4. A turntable 5 is installed on the output end of the rotary cylinder 2. An arc-shaped moving hole 51 is opened on the turntable 5. A guide rod 322 that matches the moving hole 51 is protruding from the bottom of the slider 32. The guide rod 322 is located in the moving hole 51. The arc-shaped moving hole 51 and the guide rod 322 of the turntable 5 cooperate and convert the rotation into radial movement under the restriction of the slide groove 11. The gripper 4 is driven to rotate by the transmission component 3. When the turntable 5 rotates, it drives the guide rod 322 located in the moving hole 51 to move.

[0018] like Figure 1 , 3 As shown in Figure 5, the slider 32 and the base 1 are slidably connected. The base 1 has a radially extending groove 11. The slider 32 is arranged in the groove 11. The groove 11 guides the slider 32 radially to ensure linear movement and improve transmission accuracy.

[0019] The slider 32 has a connecting part 321 protruding from its side. A limiting component 6 for limiting the connecting part 321 is arranged in the groove 11. The limiting component 6 includes a pad 61 and a pressure block 62. The pad 61 is located below the connecting part 321, and the pressure block 62 is located above the connecting part 321. The pad 61 is fixedly connected to the base 1, and the pressure block 62 is fixedly connected to the pad 61. A limiting cavity for accommodating the connecting part 321 is formed between the pressure block 62 and the pad 61. The limiting cavity extends radially along the base 1. The limiting component 6 (pad 61 and pressure block 62) forms a closed cavity, constraining the connecting part 321 to move only radially.

[0020] like Figure 1 As shown, the car wheel hub inner ring gripper also includes a bracket 7, and the bottom surface of the base 1 is fixedly connected to the bracket 7.

[0021] like Figure 1 , 3 As shown, the base 1 includes a base 12 and a pressure plate 13, which are fixedly connected. The rotary cylinder 2 is arranged inside the base 12. The split base 1 simplifies the disassembly and assembly process of the rotary cylinder 2.

[0022] Working process: The clamping body mechanism uses a rotary cylinder 2 to drive the turntable 5 to rotate. The rotation-linear motion conversion is achieved through the cooperation of the moving hole 51 and the slider 32. The clamping body is connected to the robot arm through the bracket 7.

[0023] Clamping process: When the rotary cylinder 2 is driven clockwise, the turntable 5 rotates clockwise in sync, causing the slider 32 to move radially inward in a straight line. The slider 32 pulls the gripper 4 around the fixed rod 31 to retract through the connecting rod 33, clamping the inner ring of the hub. Release process: When the rotary cylinder 2 is driven counterclockwise, the turntable 5 rotates counterclockwise, causing the slider 32 to move outward in a linear motion along the radial direction. The outward movement of the slider 32 pushes the gripper 4 to open via the connecting rod 33, releasing the hub and realizing the release of the workpiece. The slider includes a slider body and a slider seat. The slider body and the connecting rod 33 are connected. The slider body and the slider seat form a rigid connection. The slider 32 and the turntable 5 are engaged through a precision-machined moving hole 51 to form a composite motion constraint mechanism of a rotary pair and a sliding pair.

[0024] For workpieces of different sizes and shapes, four different gripper modules can be replaced, with a gripping stroke of 20mm.

[0025] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vehicle wheel hub inner race gripping fixture, characterized by, The device includes a base (1), a rotary cylinder (2), several transmission components (3), and several gripping claws (4). The rotary cylinder (2) is fixedly connected to the base (1). The output end of the rotary cylinder (2) is connected to the input end of the transmission component (3). The transmission component (3) and the gripping claws (4) are paired one-to-one. The output end of the transmission component (3) is connected to the gripping claws (4). The rotary cylinder (2) is used to provide power for the gripping claws (4) to close and clamp the hub or to release the hub. The gripping claws (4) are located above the base (1).

2. A wheel hub inner race gripper clamp as defined in claim 1 wherein: The transmission assembly (3) includes a fixed rod (31), a slider (32), and a connecting rod (33). One end of the fixed rod (31) is fixedly connected to the base (1), and the other end is rotatably connected to the gripper (4). One end of the connecting rod (33) is rotatably connected to the slider (32), and the other end is rotatably connected to the gripper (4). A turntable (5) is installed on the output end of the rotary cylinder (2). An arc-shaped moving hole (51) is opened on the turntable (5). A guide rod (322) matching the moving hole (51) is protruding from the bottom of the slider (32). The guide rod (322) is located inside the moving hole (51). When the turntable (5) rotates, the turntable (5) drives the guide rod (322) located in the moving hole (51) to move.

3. A wheel hub inner race gripper clamp as defined in claim 2 wherein: The slider (32) and the base (1) are slidably connected. The base (1) has a radially extending groove (11) and the slider (32) is arranged in the groove (11).

4. A wheel hub inner race gripper clamp as defined in claim 3 wherein: The slider (32) has a connecting part (321) protruding from its side. A limiting component (6) for limiting the connecting part (321) is arranged in the groove (11). The limiting component (6) includes a pad (61) and a pressure block (62). The pad (61) is located below the connecting part (321), and the pressure block (62) is located above the connecting part (321). The pad (61) is fixedly connected to the base (1), and the pressure block (62) is fixedly connected to the pad (61). A limiting cavity for accommodating the connecting part (321) is formed between the pressure block (62) and the pad (61). The limiting cavity extends radially along the base (1).

5. The automotive wheel hub inner race grab fixture of claim 1 wherein: The car wheel hub inner ring gripper also includes a bracket (7), and the bottom surface of the base (1) and the bracket (7) are fixedly connected.

6. A wheel hub inner race gripper clamp as described in claim 1, wherein: The base (1) includes a base (12) and a pressure plate (13), which are fixedly connected. The rotary cylinder (2) is arranged inside the base (12).

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