Universal clamp for drilling valve hole

Abstract

The utility model relates to a universal fixture for drilling a valve hole, which comprises a fixture supporting piece and a plurality of cylinder elements arranged on the fixture supporting piece, the mounting position of at least one cylinder element can be adjusted relative to the fixture supporting piece, and piston rods of the cylinder elements can tightly press the surface of a rim flange. The clamp supporting piece is further provided with a plurality of limiting elements abutting against the side wall of the rim, and the position of at least one limiting element can be automatically adjusted relative to the clamp supporting piece. The position of the air cylinder element can be adjusted, the position of the air cylinder element can be adjusted in cooperation with the limiting element, and the positions of the air cylinder element and the limiting element can be changed so that rims of different specifications can be locked through the whole clamp.

Description

Technical Field

[0001] This utility model relates to the field of wheel rim clamping technology, specifically to a universal clamping tool for drilling valve holes. Background Technology

[0002] Wire-spoke wheels, also known as spoked wheels, consist of spokes, a hub, and a rim. Due to their good elasticity and ability to absorb road impacts, they are suitable for unpaved roads, and off-road motorcycles typically use spoked wheels. The motorcycle rim is the core component of the motorcycle wheel. The valve hole on the rim is a crucial structure for installing the tire valve, used for inflation / deflation and monitoring tire pressure. Its position and precision directly affect tire sealing, especially in tubeless applications where strict perpendicularity and edge smoothness of the hole are essential to prevent leaks. For spoked rims, the valve hole is usually positioned away from the spoke holes, while for aluminum alloy rims, structural strength must be considered when creating the hole.

[0003] It is crucial that the fixture can hold wheel rims or wheels of different diameters. Wheel rim diameters vary significantly between different vehicle models; for example, motorcycle rims commonly range from 17 to 21 inches. Universal fixtures can reduce redundant equipment investment. A well-designed fixture system is fundamental to ensuring the quality of the wheel rim valve bore machining.

[0004] The authorization announcement number CN222726400U discloses a jig for processing automobile wheel hubs. According to its instruction manual and drawings, the solution uses a clamping motor to drive a circular toothed column to rotate, which causes the connecting block to push the slider towards the body, so that both clamping plates can be tightly attached to the wheel hub, thereby achieving an automatic clamping effect and improving the practicality of the device.

[0005] However, there are still some limitations in its solution: 1. Although the solution can clamp rims or hubs of different diameters, the clamping efficiency is low and cannot meet the fast-paced needs of production; 2. The clamps in the solution use a clamping plate to fit a large area with the rim or hub. Although the fixing effect is achieved, it can cause scratches on the side wall of the rim. Summary of the Invention

[0006] This utility model mainly addresses the problem of the universality of clamps for holding wheel rims of different specifications. It proposes a universal clamp for drilling valve holes. In this solution, the cylinder element can slide and adjust its position inside the first waist-shaped through hole, and with the help of the limiting element, it can slide and adjust its position inside the second waist-shaped through hole, so that the entire clamp can lock wheel rims of different specifications.

[0007] The objective of this invention is achieved through the following technical solution: a universal fixture for drilling valve holes, comprising a fixture support, a plurality of cylinder elements disposed on the fixture support, at least one cylinder element being able to adjust its installation position relative to the fixture support, the piston rod of the cylinder element being able to press against the surface of the wheel rim flange, the fixture support also being provided with a plurality of limiting elements abutting against the side wall of the wheel rim, at least one limiting element being able to automatically adjust its position relative to the fixture support.

[0008] Preferably, the cylinder element is a rotary cylinder, and the position change of the piston rod of the rotary cylinder can press or release the surface of the rim flange. This setting is to achieve automatic pressing and limiting of the rim flange surface.

[0009] Preferably, the clamp support includes a support column, a clamp base plate, and a clamp top plate. The bottom of each support column is mounted on the surface of the clamp base plate, and the top of each support column is mounted on the clamp top plate. This arrangement is to achieve a detachable fit between the support column, the clamp base plate, and the clamp top plate.

[0010] Preferably, the bottom of the fixture top plate is provided with several detachable first limiting screws, and a limiting plate is detachably provided between adjacent first limiting screws. The bottom of the corner cylinder is locked inside the gap between the limiting plate and the fixture top plate.

[0011] Preferably, the surface of the clamp support is provided with a plurality of first oblong through holes of different lengths and a plurality of first limiting circular holes. A cylinder element is installed inside each of the first limiting circular holes and the first oblong through holes. The cylinder element located inside the first oblong through hole can adjust its position relative to the clamp support.

[0012] Preferably, the surface of the clamp support is further provided with a plurality of second oblong through holes and a plurality of second limiting circular holes, and each second oblong through hole and the second limiting circular hole is equipped with a limiting element. The limiting element located inside the second oblong through hole can automatically adjust its position relative to the clamp support.

[0013] Preferably, the surface of the clamp support is further provided with a third oblong through hole, and a cylinder support plate is provided below the third oblong through hole. A telescopic cylinder is provided on the lower end face of the cylinder support plate. A sliding plate is connected to the piston rod end of the telescopic cylinder. Sliding limit blocks are provided on both sides of the sliding plate extending upward. The sliding limit blocks are locked inside the second oblong through hole, and each sliding limit block is provided with a limiting element on its surface.

[0014] Preferably, the limiting element includes a second limiting screw and a screw sleeve installed on the top of the second limiting screw. The screw sleeve is provided so that the entire limiting element has a square root support effect when clamping the rim flange.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The cylinder element in this solution can slide and adjust its position inside the first oblong through hole, and in conjunction with the limiting element, it can slide and adjust its position inside the second oblong through hole. The positional changes of the cylinder element and the limiting element can enable the entire fixture to lock the rims of different specifications.

[0017] 2. The cylinder element realizes the vertical downward pressure on the rim flange and the lateral limiting of the rim flange in combination with the limiting element. This design of making the rim bear multiple forces can prevent local stress concentration when the rim is processed for valve holes, and optimize the processing accuracy of the valve hole of the rim.

[0018] 3. The corner cylinder automatically presses the rim flange surface, and the limiting element automatically clamps the side of the rim flange under the control of the telescopic cylinder. This design significantly improves the clamping speed compared to manual clamps. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is a perspective view of the present utility model;

[0021] Figure 3 This is a perspective view of the present utility model;

[0022] Figure 4 This is a schematic diagram of the present invention after clamping the friction ring;

[0023] Figure 5 This utility model relates to Figure 4 A partial 3D view of a cylinder component and a limiting component after they have been removed from the cylinder.

[0024] Figure 6 This is a schematic diagram of how the cylinder element of this utility model is adjusted to clamp rims of different sizes.

[0025] The markings in the diagram are as follows: 1. Fixture support; 11. Support column; 12. Fixture base plate; 13. Fixture top plate; 14. First limiting screw; 15. Limiting plate; 16. First oblong through hole; 17. First limiting round hole; 18. Second oblong through hole; 19. Second limiting round hole; 10. Third oblong through hole; 2. Cylinder element; 3. Limiting element; 31. Second limiting screw; 32. Screw sleeve; 4. Cylinder support plate; 41. Telescopic cylinder; 42. Sliding plate; 43. Sliding limiting block. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0027] like Figure 1 and Figure 2 As shown, a universal fixture for drilling valve holes includes a fixture support 1 and several cylinder elements 2 mounted on the fixture support 1. The fixture support 1 includes support columns 11, a fixture base plate 12, and a fixture top plate 13. The bottom of each support column 11 is mounted on the surface of the fixture base plate 12, and the top of each support column 11 is mounted on the fixture top plate 13. The fixture support 1 is also provided with several limiting elements 3 that abut against the side wall of the wheel rim.

[0028] The fixture support 1 is mounted on a machining center or drilling equipment. The detachable design between the support column 11, the fixture base plate 12, and the fixture top plate 13 facilitates subsequent replacement of damaged modules.

[0029] Please continue to refer to this. Figure 3 As shown, the bottom of the clamp top plate 13 is provided with several detachable first limiting screws 14, and a limiting plate 15 is detachably provided between adjacent first limiting screws 14. The bottom of the corner cylinder is engaged in the gap between the limiting plate 15 and the clamp top plate 13. The piston rod of the cylinder element 2 can press against the surface of the wheel rim. In this embodiment, the cylinder element 2 is a corner cylinder, and the position change of the piston rod of the corner cylinder can press against or release the surface of the wheel rim.

[0030] When fixing the wheel rim, firstly, the side of the wheel rim flange is pressed against the side of the limiting element 3 to restrict the wheel rim from sliding to the left. For the wheel rim to be tightly fitted against the surface of the clamp support 1, the limiting plate 15 can lock the bottom of the corner cylinder, so that the corner cylinder is in a fixed state, and the piston rod of the corner cylinder can press against the surface of the wheel rim flange. The cooperation between the limiting element 3 and the corner cylinder achieves the locking of the wheel rim.

[0031] In this embodiment, please refer to Figure 2 , Figure 4 and Figure 5 At least four cylinder elements 2 are adjustable in position relative to the clamp support 1, while the other two cylinder elements 2 are fixed. Specifically, the surface of the clamp support 1 is provided with a plurality of first oblong through holes 16 of different lengths and a plurality of first limiting circular holes 17. A cylinder element 2 is installed inside each of the first limiting circular holes 17 and the first oblong through holes 16. The cylinder element 2 located inside the first oblong through hole 16 is adjustable in position relative to the clamp support 1.

[0032] like Figure 4As shown, the clamp of this embodiment holds a first-specification rim: the positions of the six cylinder elements 2 can be pressed from six points on the rim flange surface. These six points are set with full consideration of the machining direction of the rim when machining the valve hole, so that the four points on the left can provide better support when machining the valve hole on the rim.

[0033] like Figure 6 As shown, the clamp in this embodiment holds a second type of rim: due to Figure 4 The status was adjusted to Figure 5 The process involves removing each first limiting screw 14 and reinstalling it inside the threaded hole on the surface of the fixture top plate 13. It is important to note that during the reinstallation of the first limiting screw 14, the limiting plate 15 and the cylinder element 2 are adjusted in position simultaneously with the first limiting screw 14. At this time, the cylinder element 2 also slides inside the first oblong through hole 16. Therefore, after adjusting to the appropriate position, the cylinder element 2 can be re-locked, which facilitates the pressing and locking of the wheel rim flange.

[0034] like Figure 4 As shown, the length of the first waist-shaped through hole 16 on the left is less than the length of the first waist-shaped through hole 16 on the right. This arrangement is to ensure that when the rim specification changes, the area pressed by the piston rod of the cylinder element 2 is consistent with the pressing position of the rim flange of the previous specification rim.

[0035] Please continue to refer to this. Figure 2 , Figure 3 and Figure 5 As shown. Two limiting elements 3 can automatically adjust their positions relative to the clamp support 1, while the other two limiting elements 3 are in a fixed state relative to the clamp support 1.

[0036] The surface of the fixture top plate 13 is also provided with a plurality of second oblong through holes 18 and a plurality of second limiting circular holes 19. Each second oblong through hole 18 and each second limiting circular hole 19 is equipped with a limiting element 3. The limiting element 3 located inside the second oblong through hole 18 can automatically adjust its position relative to the fixture support 1. The limiting element 3 includes a second limiting screw 31 and a screw sleeve 32 installed on the top of the second limiting screw 31. The screw sleeve 32 is the main force point of the limiting element 3 when it is limited.

[0037] The limiting element 3 located on the left abuts against the left side of the rim flange, while the limiting element 3 located on the right presses against the inner side of rims of different specifications after the position is adjusted, so as to provide better support and limiting effect when machining valve holes on the rim.

[0038] To achieve position adjustment of the limiting element 3: the surface of the fixture top plate 13 is also provided with a third oblong through hole 10, and a cylinder support plate 4 is provided below the third oblong through hole 10. The lower end face of the cylinder support plate 4 is provided with a telescopic cylinder 41. The piston rod end of the telescopic cylinder 41 is connected to a sliding plate 42. The two sides of the sliding plate 42 extend upward and are provided with sliding limiting blocks 43. The sliding limiting blocks 43 are set inside the second oblong through hole 18 and each sliding limiting block 43 is provided with a limiting element 3 on its surface.

[0039] When the piston rod of the telescopic cylinder 41 slides, it can drive the sliding plate 42 to move. During the movement of the sliding plate 42, it can simultaneously drive the sliding limit block 43 to slide inside the second oblong through hole 18. The limiting between the sliding limit block 43 and the inside of the second oblong through hole 18 can effectively ensure that the limiting element 3 at the end of the sliding limit block 43 will not deviate during the movement and will always be in a linear motion, thereby facilitating clamping each time and ensuring that the limiting point is in the set position.

[0040] Working principle and usage of this utility model:

[0041] When the rim is fixed in a limiting position, the side of the rim flange is first placed against the sides of the two limiting elements 3 located on the left side. When the piston rod of the telescopic cylinder 41 slides, it can drive the sliding plate 42 to move. During the movement, the sliding plate 42 can simultaneously drive the sliding limiting block 43 to slide inside the second waist-shaped through hole 18 until the limiting element 3 on the sliding limiting block 43 can restrict the rim from sliding to the left and to the right.

[0042] The bottom of the rim is tightly fitted to the surface of the clamp top plate 13 for limiting. The piston rod of the corner cylinder can press against the surface of the rim flange. The cooperation between the limiting element 3 and the corner cylinder achieves locking of the rim.

[0043] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A universal fixture for drilling valve holes, comprising a fixture support (1) and a plurality of cylinder elements (2) disposed on the fixture support (1), characterized in that, At least one cylinder element (2) is able to adjust its installation position relative to the clamp support (1), the piston rod of the cylinder element (2) is able to press against the surface of the rim flange, and the clamp support (1) is also provided with a plurality of limiting elements (3) abutting against the side wall of the rim, and at least one limiting element (3) is able to automatically adjust its position relative to the clamp support (1).

2. The universal fixture for drilling valve holes according to claim 1, characterized in that, The cylinder element (2) is a rotary cylinder, and the position change of the piston rod of the rotary cylinder can press or release the surface of the rim flange.

3. The universal fixture for drilling valve holes according to claim 2, characterized in that, The clamp support (1) includes a support column (11), a clamp base plate (12) and a clamp top plate (13). The bottom of each support column (11) is mounted on the surface of the clamp base plate (12), and the top of the support column (11) is mounted on the clamp top plate (13).

4. The universal fixture for drilling valve holes according to claim 3, characterized in that, The bottom of the fixture top plate (13) is provided with several detachable first limiting screws (14), and a limiting plate (15) is detachably provided between adjacent first limiting screws (14). The bottom of the corner cylinder is installed inside the gap between the limiting plate (15) and the fixture top plate (13).

5. The universal fixture for drilling valve holes according to claim 1, characterized in that, The surface of the clamp support (1) is provided with a number of first waist-shaped through holes (16) of different lengths and a number of first limiting round holes (17). Each first limiting round hole (17) and first waist-shaped through hole (16) is equipped with a cylinder element (2). The cylinder element (2) located inside the first waist-shaped through hole (16) can adjust its position relative to the clamp support (1).

6. The universal fixture for drilling valve holes according to claim 5, characterized in that, The surface of the clamp support (1) is also provided with a number of second waist-shaped through holes (18) and a number of second limiting round holes (19). Each second waist-shaped through hole (18) and the second limiting round hole (19) is equipped with a limiting element (3). The limiting element (3) located inside the second waist-shaped through hole (18) can automatically adjust its position relative to the clamp support (1).

7. The universal fixture for drilling valve holes according to claim 6, characterized in that, The surface of the clamp support (1) is also provided with a third waist-shaped through hole (10), and a cylinder support plate (4) is provided below the third waist-shaped through hole (10). A telescopic cylinder (41) is provided on the lower end face of the cylinder support plate (4). A sliding plate (42) is connected to the piston rod end of the telescopic cylinder (41). Sliding limit blocks (43) are provided on both sides of the sliding plate (42) extending upward. The sliding limit blocks (43) are located inside the second waist-shaped through hole (18), and each sliding limit block (43) is provided with a limit element (3) on its surface.

8. The universal fixture for drilling valve holes according to any one of claims 1 to 7, characterized in that, The limiting element (3) includes a second limiting screw (31) and a screw sleeve (32) installed on the top of the second limiting screw (31).

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