Quick hub clamping device based on sharp corner contact positioning

Abstract

The utility model provides a quick hub clamping device based on sharp corner contact positioning. The quick hub clamping device solves the problems that an existing hub clamping device is prone to positioning deviation, dust interference and tedious maintenance. Comprising a clamp body. The clamp main body is detachably connected with a plurality of clamping units, and the clamping units are symmetrically arranged; the clamping unit is of a disc-shaped structure, and an inclined flow guide groove is formed in the periphery of the clamping unit; a contact part which is in point-line contact fit with the hub is arranged on the periphery of the diversion trench, and the section of the contact part is in a V-shaped sharp corner shape. The hub clamp is widely applied to the technical field of hub clamps.

Description

Technical Field

[0001] This application relates to the field of wheel hub clamping technology, and more specifically, to a quick clamping device for wheel hubs based on sharp corner contact positioning. Background Technology

[0002] In the powder coating process of aluminum wheels, traditional clamps often employ a curved surface structure. During clamping, multiple clamps in different positions utilize their curved surfaces to fit tightly against the outer rim, thereby achieving a stable clamping of the wheel hub. This type of clamp has a simple structure, mature manufacturing process, low production cost, and can quickly complete the wheel hub clamping operation.

[0003] However, in practical applications, traditional fixtures have the following problems: 1. When the fixture positions itself by contacting the outer rim with its arc surface, the large contact area of ​​the arc surface makes it prone to positioning deviations when the outer rim deforms or exhibits dimensional deviations. Minor dimensional tolerances between different batches of wheel hubs are unavoidable, and these slight differences can cause positioning deviations, requiring repeated manual calibration and adjustment, severely impacting wheel hub processing efficiency. 2. During the painting process, dust easily accumulates on the contact surface between the fixture and the wheel hub. To reduce dust interference and ensure clamping reliability, frequent cleaning is required, affecting the fixture's continuous operation efficiency. 3. The arc surface of the fixture requires high machining precision during manufacturing, and during long-term use, the arc surface wears down, affecting clamping accuracy. To ensure clamping accuracy and production quality, the fixture needs to be replaced promptly, resulting in high initial manufacturing costs and subsequent maintenance and replacement costs for traditional fixtures.

[0004] With the market's increasing demands for wheel hub product quality and production efficiency, there is an urgent need for a quick clamping device for wheel hubs that offers high positioning accuracy, good dust resistance, and easy maintenance. This would solve the problems faced by current traditional clamping devices, such as positioning deviations, dust interference, and cumbersome maintenance. Utility Model Content

[0005] To address the aforementioned problems, the present invention provides a quick-clamping device for wheel hubs based on sharp-angle contact positioning, which solves the problems of positioning deviation, dust interference, and cumbersome maintenance in existing wheel hub clamping devices. The device includes a clamping body; the clamping body is detachably connected to multiple clamping units, which are symmetrically arranged; each clamping unit has a disc-shaped structure, and an inclined guide groove is provided along its outer periphery; the outer periphery of the guide groove has a contact portion that forms a point-line contact with the wheel hub, and the cross-section of the contact portion is a V-shaped sharp angle.

[0006] Preferably, the V-shaped sharp angle of the contact portion is in the range of 30° to 45°.

[0007] Preferably, there are two contact parts, which are symmetrically arranged above and below the horizontal centerline of the clamping unit.

[0008] Preferably, the inclination angle of the guide channel is in the range of 30° to 45°.

[0009] Preferably, the guide channel is provided with multiple evenly spaced dust discharge holes.

[0010] Preferably, the clamping unit is made of cemented carbide with a chrome-plated surface and a hardness ≥ HRC60°.

[0011] Preferably, the fixture body is connected to four clamping arms, and the clamping arms and clamping units are threaded together.

[0012] Preferably, the clamping arm is slidably connected to the clamp body, and the clamping arm is connected to a drive mechanism.

[0013] The beneficial effects of this invention are as follows: The V-shaped sharp corner of the contact part forms a point-line contact fit with the outer circumference of the wheel hub. Compared with the traditional arc surface contact, this reduces the contact area. The concentrated contact stress allows for rapid adjustment of the clamping position, improving positioning accuracy. When dealing with different batches of wheel hubs, the contact part can adaptively conform to the outer circumference contour of the wheel hub, ensuring stable clamping and reducing the sensitivity of the clamping unit to wheel hub tolerances. This avoids the problem of insufficient positioning accuracy in traditional clamping contact methods, meeting the requirements for high-precision clamping and improving product processing quality. Dust slides down along the inclined guide groove, reducing the amount of dust accumulation on the surface of the clamping unit and minimizing dust interference with clamping accuracy. The clamping unit has a simple structure, the sharp corner of the contact part has low requirements for machining accuracy, low maintenance frequency, low manufacturing and maintenance costs, and is suitable for large-scale mass production applications. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the clamping unit.

[0016] Figure 2 This is a side view of the clamping unit;

[0017] Figure 3 This is a schematic diagram of the structure of this utility model;

[0018] Figure 4 This is a cross-sectional schematic diagram of the clamping unit;

[0019] Symbols in the diagram: 1. Clamping unit; 2. Contact part; 3. Guide groove; 4. Dust discharge hole; 5. Mounting hole; 6. Fixture body; 7. Clamping arm. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] The present application will now describe a quick clamping device for wheel hubs based on sharp corner contact positioning.

[0024] Please see Figures 1 to 3 The quick clamping device for wheel hubs based on sharp-angle contact positioning includes a clamp body 6; the clamp body 6 is detachably connected to multiple clamping units 1, which are symmetrically arranged. Each clamping unit 1 has a disc-shaped structure and an inclined guide groove 3 along its outer periphery. Specifically, during spraying, dust slides down the inclined guide groove 3 under the action of gravity and airflow, reducing the amount of dust accumulation on the surface of the clamping unit 1 and minimizing the interference of dust on clamping accuracy. The outer periphery of the guide groove 3 has a contact portion 2 that forms a point-line contact with the outer periphery of the wheel hub. The cross-section of the contact portion 2 is a V-shaped sharp angle; please refer to [link to relevant documentation]. Figure 4The figure shows the V-shaped angle of contact part 2, with its bottom surface parallel to the horizontal plane. Specifically, contact part 2 uses a point-line contact method with the outer circumference of the wheel hub. Compared to the traditional arc-surface contact positioning method, this reduces the contact area with the outer circumference of the wheel hub, concentrating the contact stress in the point-line contact area. During clamping, the V-shaped angle of contact part 2 contacts the outer circumference of the wheel hub, and the concentrated contact stress allows for rapid adjustment of the clamping position, improving positioning accuracy. When dealing with different batches of wheel hubs, contact part 2 can adaptively conform to the outer circumference contour of the wheel hub, ensuring a stable clamping of the wheel hub, reducing the sensitivity of clamping unit 1 to wheel hub tolerances, and avoiding the problem of insufficient positioning accuracy in traditional clamping contact methods.

[0025] Specifically, the V-shaped sharp angle of contact part 2 ranges from 30° to 45°, and can be adaptively adjusted according to the curvature of the outer rim of different wheel hub models to ensure uniform pressure distribution at the contact point. When the V-shaped sharp angle is between 30° and 45°, the positioning error of the contact part is ≤0.1mm, while the positioning error of the traditional arc surface is ≥0.3mm. Compared with the traditional positioning method, this significantly improves the positioning accuracy of clamping unit 1, significantly improves the uniformity of wheel hub spraying, and increases the yield of wheel hub products by 5% to 8%. Through the sharp angle contact positioning method of contact part 2, the single clamping time of the wheel hub is shortened by 30%, improving the efficiency of clamping operations. At the same time, because the surface of contact part 2 is inclined, dust is not easy to adhere to. Compared with the traditional arc surface contact positioning method, the dust cleaning cycle of contact part 2 is extended to 3 times.

[0026] Please see Figure 4 In this embodiment, the V-shaped sharp angle of the contact part 2 is 30°, which ensures the strength of the contact part 2, concentrates the contact stress in the ideal area, and achieves high clamping and positioning accuracy; at the same time, it makes it difficult for dust to adhere to the surface of the contact part 2, reducing the frequency of downtime for cleaning.

[0027] Furthermore, there are two contact parts 2, which are symmetrically arranged above and below the horizontal centerline of the clamping unit 1 to enhance the clamping force on the wheel hub.

[0028] Specifically, the inclination angle of the guide channel 3 is in the range of 30° to 45°. Within this inclination range, it is ensured that the dust can slide smoothly down the guide channel 3, while avoiding the accumulation of dust at the connection between the guide channel 3 and the contact part 2 due to excessive angle.

[0029] Furthermore, the guide channel 3 is provided with multiple evenly spaced dust discharge holes 4. When dust slides down the guide channel 3, it can be directly discharged through the dust discharge holes 4, thereby improving dust discharge efficiency.

[0030] Specifically, the clamping unit 1 is made of cemented carbide with a chrome-plated surface and a hardness ≥ HRC60°.

[0031] Please see Figure 3The diagram below illustrates the structure of this utility model. Further, the clamp body 6 is connected to four clamping arms 7, which are threadedly connected to the clamping unit 1. Specifically, the clamping unit 1 has a mounting hole 5 at its center. The clamping unit 1 is mounted onto the clamping arm 7 through the threaded engagement of the mounting hole 5 with bolts or other connecting parts. When a clamping unit 1 malfunctions, it can be quickly removed from the clamping arm 7 for individual repair or replacement, reducing maintenance costs. Replacement costs are only 10% to 15% of the overall device's cost, while extending the overall device's service life to more than twice that of the original method.

[0032] Furthermore, the clamping arm 7 is slidably connected to the clamp body 6, and the clamping arm 7 is connected to a drive mechanism.

[0033] The working process of this utility model is as follows: In use, the wheel hub to be clamped is placed at the center of the overall device. The drive mechanism starts according to the preset program, controlling the clamping arm 7 to move radially along the clamp body 6. The clamping unit 1 approaches the outer circumference of the wheel hub, and the contact part 2 forms a point-line contact fit with the outer circumference of the wheel hub. Precise positioning is achieved through the V-shaped sharp angle, completing the clamping operation. After the spraying process is completed, the drive mechanism starts again, the clamping unit 1 is reset, and the wheel hub can be quickly removed.

[0034] In this invention, the V-shaped sharp corner of the contact part 2 forms a point-line contact fit with the outer periphery of the wheel hub. Compared with the traditional arc surface contact, this reduces the contact area, and the concentrated contact stress allows for rapid adjustment of the clamping position, improving positioning accuracy. When dealing with different batches of wheel hubs, the contact part 2 can adaptively conform to the outer periphery of the wheel hub, ensuring a stable clamping of the wheel hub, reducing the sensitivity of the clamping unit 1 to wheel hub tolerances, avoiding the problem of insufficient positioning accuracy in traditional clamping contact methods, meeting the requirements for high-precision clamping, and improving product processing quality. Dust slides down along the inclined guide groove 3, reducing the amount of dust accumulation on the surface of the clamping unit 1 and reducing the interference of dust on clamping accuracy. The clamping unit 1 has a simple structure, the sharp corner of the contact part 2 has low requirements for machining accuracy, low maintenance frequency, low manufacturing and maintenance costs, and is suitable for large-scale mass production applications.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A quick clamping device for wheel hubs based on sharp corner contact positioning, comprising a clamp body (6); characterized in that: The clamp body (6) is detachably connected to multiple clamping units (1), and the multiple clamping units (1) are symmetrically arranged; the clamping unit (1) is a disc-shaped structure, and the clamping unit (1) is provided with an inclined guide groove (3) along its outer periphery; the outer periphery of the guide groove (3) is provided with a contact part (2) that forms a point-line contact with the hub, and the cross section of the contact part (2) is a V-shaped sharp angle.

2. The quick clamping device for wheel hubs based on sharp corner contact positioning as described in claim 1, characterized in that: The V-shaped sharp angle of the contact part (2) ranges from 30° to 45°.

3. The quick clamping device for wheel hubs based on sharp corner contact positioning as described in claim 2, characterized in that: The number of contact parts (2) is two, and they are symmetrically arranged above and below the horizontal center line of the clamping unit (1).

4. The quick-clamping device for wheel hubs based on sharp-angle contact positioning as described in claim 2, characterized in that: The inclination angle of the guide groove (3) is in the range of 30°~45°.

5. The quick clamping device for wheel hubs based on sharp corner contact positioning as described in claim 1, characterized in that: The guide channel (3) is provided with multiple evenly spaced dust discharge holes (4).

6. The quick-clamping device for wheel hubs based on sharp-angle contact positioning as described in claim 1, characterized in that: The clamping unit (1) is made of hard alloy with chrome plating and a hardness ≥ HRC60°.

7. The quick clamping device for wheel hubs based on sharp corner contact positioning as described in claim 1, characterized in that: The clamp body (6) is connected to four clamping arms (7), and the clamping arms (7) and the clamping unit (1) are threadedly connected.

8. The quick clamping device for wheel hubs based on sharp corner contact positioning as described in claim 7, characterized in that: The clamping arm (7) is slidably connected to the clamp body (6), and the clamping arm (7) is connected to a drive mechanism.

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