Clamp for clamping center hole of rim

Abstract

The utility model relates to the technical field of clamps, in particular to a clamp for clamping a middle hole of a rim, which comprises a lower clamping plate, a sleeve is coaxially and fixedly connected to the top end of the lower clamping plate, a plurality of telescopic jacking rods are movably connected to the surface of the sleeve and are arranged in an annular array by taking the sleeve as a shaft, and the top end of the lower clamping plate is fixedly connected with the sleeve. An inclined wedge block capable of vertically moving up and down is coaxially and movably connected into the sleeve, the inclined wedge block is used for pushing the jacking rod to move on the horizontal plane, the top end of the inclined wedge block is in a pointed cone shape, a first screw rod is coaxially and rotatably connected to the surface of the lower clamping plate, and the first screw rod movably penetrates through the surface of the inclined wedge block; the first threaded rod is in threaded connection with the inclined wedge block, and a plurality of movable holes for the jacking rods to horizontally move are formed in the surface of the sleeve in a matched mode. The rim clamping device aims at solving the problem that a rim needs to be clamped at the position of a middle hole.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp used for clamping a center hole of a rim. Background Art

[0002] The rim is the component around the wheel where the tire is mounted. The center hole of the rim refers to the hole located in the center of the rim. It is mainly used to install the axle. The axle is connected to the rim through the center hole to realize the combination of the wheel and the vehicle chassis or body. During the rim processing, the rim needs to be fixed with a clamp. During turning, drilling and other processing operations, the use of a clamp can fix the rim in the correct position to ensure that the processing size meets the design requirements.

[0003] Existing wheel rims need to go through multiple processes during the processing. If the wheel rim outer ring is clamped, it is difficult to ensure the positioning accuracy and consistency between the processes due to the possible slight changes in the clamping position of the outer ring between different processes, which can easily lead to cumulative errors and affect the overall processing quality of the wheel hub. Clamping at the center hole position can ensure the positioning consistency between the processes. Once the center hole position is accurately fixed, subsequent processing operations can be performed based on this stable positioning. Therefore, a fixture for clamping the center hole of the wheel rim is designed. Utility Model Content

[0004] The purpose of the utility model is to provide a clamp for clamping the center hole of a rim, so as to solve the problem that the rim needs to be clamped at the center hole position.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A clamp for clamping the center hole of a wheel rim comprises a lower clamping plate, the top end of the lower clamping plate is coaxially fixedly connected to a sleeve, the surface of the sleeve is movably connected to a retractable push rod, there are multiple push rods, and they are arranged in a circular array with the sleeve as the axis, and an inclined wedge block that can move vertically up and down is coaxially movably connected inside the sleeve, and the inclined wedge block is used to push the push rod to move on the horizontal plane.

[0007] Preferably, the top end of the oblique wedge is a pointed cone, the surface of the lower clamping plate is coaxially rotatably connected to a first screw, the first screw moves through the surface of the oblique wedge, and the first screw and the oblique wedge are threadedly connected.

[0008] Preferably, the surface of the sleeve is provided with a plurality of movable holes for horizontal movement of the pushing rod, the number of the movable holes corresponds to the number of the pushing rods, the wall of each movable hole is fixedly connected to a limiting slider, and the surface of each pushing rod is provided with a limiting groove for horizontal movement of the limiting slider.

[0009] Preferably, one end of each of the push rods located inside the sleeve is rotatably connected to a roller, and the roller is used to contact the inclined wedge block.

[0010] Preferably, a lifting plate that can move up and down is installed on the top end of the sleeve, and a detachable upper clamping plate is coaxially connected to the top surface of the lifting plate.

[0011] Preferably, the bottom end of the lifting plate is vertically fixedly connected with a second screw, the surface of the second screw is coaxially movably sleeved with a right threaded barrel, the second screw and the threaded barrel are threadedly connected, and the threaded barrel and the lower clamping plate are rotationally connected.

[0012] Preferably, a bolt is coaxially and movably inserted into the surface of the upper clamping plate, and a thread groove for threaded connection of the bolt is formed at the top end of the lifting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By setting up the inclined wedge block and the push rod, the sleeve is placed at the position of the rim center hole. By moving the inclined wedge block upward, all the push rods are pushed outward horizontally until the outer ends of the push rods abut against the wall of the center hole. This can limit the translation of the rim in the XY plane, which is conducive to the processing and positioning of the rim;

[0015] 2. By setting up an upper clamping plate and using it in conjunction with a lower clamping plate, when the rim is restricted from translation in the XY plane by the pressing rod, the upper clamping plate and the lower clamping plate are clamped together to restrict the movement of the rim in the XZ plane or the YZ plane, which is beneficial for the processing and positioning of the rim. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the utility model in overall cross-section;

[0018] Figure 3 This is a schematic diagram of the cross-section structure of the sleeve of the utility model;

[0019] Figure 4 This is a structural diagram of the lifting plate of the utility model;

[0020] Figure 5 This is a schematic diagram of the overall vertical section structure of the utility model;

[0021] Figure 6 This is a schematic structural diagram of a vertical section of a threaded barrel of the present invention;

[0022] Figure 7This is a schematic diagram of the structure of the connection between the upper clamping plate and the lifting plate of the utility model.

[0023] In the figure: 1. Lower clamping plate; 2. Sleeve; 3. Lifting plate; 4. First motor; 5. First screw; 6. Inclined wedge; 7. Pressing rod; 8. Movable hole; 9. Limiting slider; 10. Limiting slide groove; 11. Roller; 12. Second screw; 13. Threaded barrel; 14. Second motor; 15. Threaded groove; 16. Bolt; 17. Upper clamping plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1 to 7 , the utility model provides a technical solution:

[0026] A clamp for clamping the center hole of a wheel rim comprises a lower clamping plate 1, the top end of the lower clamping plate 1 is coaxially fixedly connected to a sleeve 2, the surface of the sleeve 2 is movably connected to a retractable push rod 7, there are multiple push rods 7, and they are arranged in a ring array with the sleeve 2 as the axis, and the sleeve 2 is coaxially movably connected to an inclined wedge block 6 that can move vertically up and down, and the inclined wedge block 6 is used to push the push rod 7 to move on the horizontal plane, and the sleeve 2 is placed at the position of the center hole of the wheel rim. By moving the inclined wedge block 6 upward, all the push rods 7 are pushed outward horizontally until the outer end of the push rod 7 abuts against the wall of the center hole, thereby limiting the translation of the wheel rim in the XY plane, which is beneficial for processing and positioning the wheel rim. The technicians in this field should brake according to the technology they are familiar with. The lower clamp 1 can be fixed vertically on the work surface, or the lower clamp 1 can be fixed on the robotic arm as needed. The position of the clamp can be adjusted by rotating the robotic arm. The fixing method can also adopt the technology familiar to those skilled in the art, which will not be elaborated here. When the inclined wedge block 6 moves downward and separates from the pushing rod 7, the pushing rod 7 is not subject to force, and the limitation on the rim can be released. The pushing rod 7 can be directly pressed back into the sleeve 2 manually, or a reset spring can be installed between the pushing rod 7 and the sleeve 2 as needed. When the pushing rod 7 is no longer subject to the force of the inclined wedge block 6, it automatically retracts into the sleeve 2 under the action of the reset spring.

[0027] The top of the inclined wedge block 6 is a pointed cone, and the surface of the lower splint 1 is coaxially connected to the first screw 5. The first screw 5 moves through the surface of the inclined wedge block 6, and the first screw 5 and the inclined wedge block 6 are threadedly connected. By rotating the first screw 5, the inclined wedge block 6 moves up and down along the surface of the first screw 5. A first motor 4 is installed at the bottom end of the lower splint 1 as needed. The output end of the first motor 4 is coaxially fixedly connected to the bottom end of the first screw 5. By starting the first motor 4 to drive the first screw 5 to rotate, the first screw 5 is automatically driven to rotate.

[0028] The surface of the sleeve 2 is provided with a plurality of movable holes 8 for the horizontal movement of the push rod 7. The number of the movable holes 8 corresponds to the number of the push rods 7. The wall surface of each movable hole 8 is fixedly connected to the limiting slider 9. The surface of each push rod 7 is provided with a limiting groove 10 for the horizontal movement of the limiting slider 9. The movable holes 8 and the limiting groove 10 are limited so that the push rod 7 can only move horizontally.

[0029] One end of each push rod 7 located inside the sleeve 2 is rotatably connected to a roller 11, and the roller 11 is used to contact the inclined wedge block 6. During the upward movement of the inclined wedge block 6, the roller 11 contacts the inclined wedge block 6, so that the sliding friction is converted into rolling friction, which is beneficial to reducing friction.

[0030] A lifting plate 3 that can move up and down is installed at the top of the sleeve 2, and a detachable upper clamping plate 17 is coaxially connected to the top surface of the lifting plate 3. When the rim is restricted from translation in the XY plane by the pressing rod 7, the top of the lifting plate 3 is moved upward to above the rim, and then the upper clamping plate 17 is installed on the top surface of the lifting plate 3, and then the lifting plate 3 is moved downward so that the upper clamping plate 17 is clamped with the lower clamping plate 1, so as to limit the movement of the rim in the XZ plane or YZ plane. According to this setting, it is conceivable for those skilled in the art that the diameter of the lifting plate 3 is smaller than the diameter of the center hole and the diameter of the upper clamping plate 17 is larger than the diameter of the center hole.

[0031] The bottom end of the lifting plate 3 is vertically fixedly connected to a second screw 12, and the surface of the second screw 12 is coaxially movably sleeved with a right threaded barrel 13. The second screw 12 and the threaded barrel 13 are threadedly connected, and the threaded barrel 13 and the lower clamping plate 1 are rotationally connected. By rotating the threaded barrel 13, the second screw 12 moves up and down, thereby making the lifting plate 3 move up and down. According to needs, the bottom end of the lower clamping plate 1 is fixedly connected to a second motor 14, and the output end of the second motor 14 is coaxially fixedly connected to the bottom end of the threaded barrel 13. By starting the second motor 14, the threaded barrel 13 is driven to rotate to achieve automation.

[0032] A bolt 16 is coaxially inserted into the surface of the upper clamping plate 17 , and a thread groove 15 for the bolt 16 to be threadedly connected is formed on the top of the lifting plate 3 , thereby realizing a detachable connection between the upper clamping plate 17 and the lifting plate 3 .

[0033] When the first screw rod 13 is in the engagement with the first stop 14, the second stop 12 is engaged with the first stop 14, and the second stop 12 is engaged with the first stop 14, thereby limiting the movement of the wheel rim in the XY plane.

Claims

1. A clamp for clamping the center hole of a wheel rim, comprising a lower clamping plate (1), characterized in that: The top end of the lower clamping plate (1) is coaxially fixedly connected to a sleeve (2), and the surface of the sleeve (2) is movably connected to a retractable push rod (7). There are multiple push rods (7) arranged in a circular array with the sleeve (2) as the axis. The sleeve (2) is coaxially movably connected to an inclined wedge block (6) that can move vertically up and down, and the inclined wedge block (6) is used to push the push rod (7) to move on a horizontal plane.

2. A clamp for clamping the center hole of a rim according to claim 1, characterized in that: The top end of the inclined wedge block (6) is in a pointed cone shape, and the surface of the lower clamping plate (1) is coaxially connected to a first screw rod (5), the first screw rod (5) movably penetrates the surface of the inclined wedge block (6), and the first screw rod (5) and the inclined wedge block (6) are threadedly connected.

3. The clamp for clamping the center hole of a rim according to claim 1, characterized in that: The surface of the sleeve (2) is provided with a plurality of movable holes (8) for the horizontal movement of the push rod (7), the number of the movable holes (8) corresponds to the number of the push rods (7), the wall surface of each movable hole (8) is fixedly connected to a limiting slider (9), and the surface of each push rod (7) is provided with a limiting sliding groove (10) for the horizontal movement of the limiting slider (9).

4. A clamp for clamping the center hole of a rim according to claim 1, characterized in that: One end of each of the push rods (7) located inside the sleeve (2) is rotatably connected to a roller (11), and the roller (11) is used to contact the inclined wedge block (6).

5. The clamp for clamping the center hole of a rim according to claim 1, characterized in that: A lifting plate (3) that can move up and down is installed on the top end of the sleeve (2), and a detachable upper clamping plate (17) is coaxially connected to the top surface of the lifting plate (3).

6. A clamp for clamping the center hole of a rim according to claim 5, characterized in that: The bottom end of the lifting plate (3) is vertically fixedly connected to a second screw rod (12), the surface of the second screw rod (12) is coaxially movably sleeved with a right threaded barrel (13), the second screw rod (12) and the threaded barrel (13) are threadedly connected, and the threaded barrel (13) and the lower clamping plate (1) are rotationally connected.

7. The fixture for clamping the center hole of a rim according to claim 5, characterized in that: A bolt (16) is coaxially and movably inserted on the surface of the upper clamping plate (17), and a thread groove (15) for threaded connection of the bolt (16) is provided on the top end of the lifting plate (3).

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