Bicycle ring adjusting table

Abstract

The invention relates to a bicycle ring adjusting table which comprises a bottom plate, a supporting base assembly is connected to the bottom plate through a positioning pin, a hub supporting assembly is fixedly arranged on the supporting base assembly, a connecting base structure is connected to the bottom plate through a positioning pin, and a turning point rod is fixedly connected to the connecting base structure. One end of the turning point rod is fixedly connected with a detection arm assembly, the detection arm assembly is provided with a radial run-out detection dial indicator assembly, and one side of the detection arm assembly is connected with an axial run-out detection dial indicator assembly through a connecting rod; positioning pins are arranged among the left fixing seat, the central fixing seat, the connecting seat structure and the base for positioning connection, so that accurate positioning is realized, and mounting errors caused by assembly are reduced; positioning fine-tuning holes are formed in the left fixing seat and the right fixing seat, and a shaft rod positioning fine-tuning hole and a jackscrew are arranged on the central fixing seat, so that the position of the upper shaft rod can be finely tuned, and the problem of large shaking frame quantity of the stand column caused by a gap between a linear bearing and the shaft rod is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and particularly to a bicycle rim truing stand. Background Art

[0002] A bicycle wheel set mainly consists of five parts: hubs, spokes, rims, inner tubes and outer tires. The rim and the hub are only connected and supported by spokes. However, they need to be centered and concentric with each other, so it is quite difficult to adjust, and a rim truing stand must be used for adjustment.

[0003] At present, there are various types of rim truing stands on the market. However, due to structural defects, low machining accuracy, imprecise assembly and other problems of many products, their truing accuracy is not high, the operation is cumbersome, it is inconvenient to use, time-consuming and laborious in operation, and the truing effect is not good. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the main object of the present invention is to provide a bicycle rim truing stand.

[0005] The technical solution of the present invention is as follows: A bicycle rim truing stand includes a bottom plate. A support base assembly is connected to the bottom plate through a positioning pin. A hub support assembly is fixedly arranged on the support base assembly. A connecting seat structure is connected to the bottom plate through a positioning pin. A turning point rod is fixedly connected to the connecting seat structure. One end of the turning point rod is fixedly connected to a detection arm assembly. A radial runout detection dial indicator assembly is arranged on the detection arm assembly. An axial runout detection dial indicator assembly is connected to one side of the detection arm assembly through a connecting rod. The hub support assembly is connected to a disc brake pad runout detection dial indicator assembly through an adapter rod.

[0006] As a preferred embodiment, a part placement groove is provided on the upper surface of the bottom plate. A magnet is fixedly connected to the bottom surface of the bottom plate. A semi-circular clearance groove is provided on one side of the bottom plate. A rubber pad is provided on the bottom surface of the bottom plate.

[0007] As a preferred embodiment, the support base assembly includes a left fixed seat and a right fixed seat. A lower shaft rod and an upper shaft rod are fixedly connected between the left fixed seat and the right fixed seat. A left-hand and right-hand double-threaded trapezoidal screw is rotatably connected between the lower shaft rod and the upper shaft rod at intervals and is located between the left fixed seat and the right fixed seat. Linear bearings are arranged on both the lower shaft rod and the upper shaft rod. One end of the left-hand and right-hand double-threaded trapezoidal screw is fixedly connected to a handwheel. A central fixed seat is arranged between the left fixed seat and the right fixed seat. The hub support assemblies are symmetrically connected to both sides of the central fixed seat through bearing fixing sleeves. Positioning fine adjustment holes are provided on the left fixed seat, the right fixed seat and the central fixed seat. A setscrew is provided on the central fixed seat.

[0008] As a preferred embodiment, the hub support assembly includes columns which are symmetrically arranged. A V-groove is provided at the top of the columns, and the V-groove is fixedly connected to a V-shaped clamping block. A V-shaped groove is provided on the V-shaped clamping block, and a fixing bolt is provided at one end of the V-shaped groove.

[0009] As a preferred embodiment, the connecting seat structure includes a rotating support seat and a fixed support seat. A pivot shaft is fixedly connected between the rotating support seats, and a pivot torsion spring is provided on the pivot shaft. The pivot torsion spring is fixedly connected to a pivot connecting rod. The fixed support seat is threadedly connected to a knob ejector rod. One end of the knob ejector rod contacts the pivot connecting rod. One end of the pivot connecting rod away from the knob ejector rod is fixedly connected to a pivot rod. A shrapnel group and a DU self-lubricating bearing are sleeved on the pivot shaft.

[0010] As a preferred embodiment, the detection arm assembly includes an adapter seat which is connected to a detection arm through a torsion spring. An adjusting ejector rod is provided at one end of the adapter seat away from the detection arm. One end of the adjusting ejector rod penetrates through the connection part of the adapter seat and contacts the detection arm. A T-shaped sliding groove is provided on the adapter seat. One end of the detection arm away from the adapter seat is connected to a plastic sleeve through interference fit.

[0011] As a preferred embodiment, the radial runout detection dial indicator assembly includes a slider which is slidably connected to a T-shaped sliding groove. A dial seat is fixedly connected to the slider. A strip-shaped hole is provided on the dial seat, and a locking screw is provided on the strip-shaped hole. One end of the dial seat is fixedly connected to a radial runout dial indicator. A connecting seat is provided at the detection end of the radial runout dial indicator, and a roller is rotatably connected to the connecting seat.

[0012] As a preferred embodiment, the axial runout detection dial indicator assembly and the disc brake pad runout detection dial indicator assembly have the same structure. Both the axial runout detection dial indicator assembly and the disc brake pad runout detection dial indicator assembly include a dial indicator. A roller seat is fixedly connected to the detection end of the dial indicator, and a roller is rotatably connected to the roller seat.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0014] 1. A part placement groove is directly provided on the bottom plate, which is convenient for placing some small parts and facilitates use; magnets are provided on the bottom surface of the bottom plate, and some magnetic tools and parts can be adsorbed through magnetism, which is convenient for their placement and use and is not easy to fall off; a semi-circular clearance groove is provided on the base, so that there is a wider activity space for the hand when rotating the handwheel, and the use is more comfortable; rubber pads are provided below the base. On the one hand, the frictional noise generated by movement can be reduced, and on the other hand, the product can be placed more stably.

[0015] 2. A positioning pin is provided for positioning and connecting the left fixed seat, the center fixed seat, the connecting seat structure and the base, enabling precise positioning and reducing the installation error caused by assembly. Positioning fine-tuning holes are provided on the left fixed seat and the right fixed seat, and a shaft rod positioning fine-tuning hole and a setscrew are provided on the center fixed seat, which can fine-tune the position of the upper shaft rod, reducing the problem of large column shaking caused by the clearance between the linear bearing and the shaft rod. A double-threaded trapezoidal screw with opposite threads is adopted, having thick threads, large pitch, and good smoothness, which can move the column faster, improve work efficiency, and be more wear-resistant, thus extending the service life of the product.

[0016] 3. The double-V groove structure and the fixing screw on the V-shaped clamping block provided at the upper end of the column can fix the hub shaft rod, preventing it from loosening and shifting, which may affect the rim adjustment effect.

[0017] 4. The connecting seat structure is provided with a group of elastic pieces, enabling the pivot connecting rod to make fine adjustments in the horizontal position, which can correct the problem that the symmetry planes of the detection arm and the V-shaped clamping block are misaligned due to machining, assembly, and material deformation problems, improving the product precision. The DU self-lubricating bearing is closely fitted with the pivot shaft with only a tiny gap, and the pivot shaft can still rotate smoothly, improving the product precision. Since the surface coating of the DU self-lubricating bearing has good wear resistance and corrosion resistance, the service life of the product is also extended.

[0018] 5. A horizontal T-shaped chute is provided on the adapter seat, and the strip-shaped hole on the dial gauge base enables the dial gauge to move horizontally left and right and vertically up and down. It is not only convenient and fast to use, but also expands the moving range and detection range of the dial gauge, improving the product performance.

[0019] 6. A roller design is adopted on the dial gauge pointer, changing the contact between the dial gauge and the rim and the disc brake pad from sliding friction to rolling friction. On the one hand, it can reduce the noise generated by the friction between the dial gauge and the rim, and on the other hand, it can also protect the rim and the dial gauge from being damaged by friction, improving the product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. [ID] is a schematic diagram of the overall structure of a bicycle rim truing stand provided by the present invention;

[0021] Figure 2 FIG. [ID] is a schematic diagram of the bottom plate structure of a bicycle rim truing stand provided by the present invention;

[0022] Figure 3 FIG. [ID] is a schematic diagram of the support base assembly structure of a bicycle rim truing stand provided by the present invention;

[0023] Figure 4 FIG. [ID] is a schematic diagram of the hub support assembly structure of a bicycle rim truing stand provided by the present invention

[0024] Figure 5Schematic diagram of the connecting seat structure of a bicycle truing stand provided by the present invention

[0025] Figure 6 Schematic diagram of the detection arm assembly structure of a bicycle truing stand provided by the present invention

[0026] Figure 7 Schematic diagram of the radial runout detection dial indicator assembly structure of a bicycle truing stand provided by the present invention

[0027] Figure 8 Schematic diagram of the position of the disc brake pad runout detection dial indicator assembly of a bicycle truing stand provided by the present invention.

[0028] Legend: 1. Base plate; 11. Part placement groove; 12. Semi-circular clearance groove; 2. Support base assembly; 21. Left fixed seat; 22. Right fixed seat; 23. Lower shaft rod; 24. Upper shaft rod; 25. Positive and negative thread double trapezoidal screw; 26. Linear bearing; 27. Handwheel; 28. Central fixed seat; 3. Hub support assembly; 31. Column; 32. V-groove; 33. V-shaped clamping block; 4. Connecting seat structure; 41. Rotating support seat; 42. Rotating point shaft; 43. Rotating point torsion spring; 44. Rotating point connecting rod; 45. Fixed support seat; 46. Knob ejector rod; 5. Rotating point rod; 6. Detection arm assembly; 61. Adapter seat; 62. Detection arm; 63. Adjusting ejector rod; 7. Radial runout detection dial indicator assembly; 71. Dial indicator base; 72. Locking screw; 73. Radial runout dial indicator; 74. Connecting seat; 75. Roller; 8. Axial runout detection dial indicator assembly; 9. Disc brake pad runout detection dial indicator assembly. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] The present invention will be further described below with reference to the drawings and specific embodiments.

[0033] Embodiment

[0034] A bicycle spoke adjustment stand, comprising a bottom plate 1. A support base assembly 2 is connected to the bottom plate 1 through a positioning pin. A hub support assembly 3 is fixedly arranged on the support base assembly 2. A connection seat structure 4 is connected to the bottom plate 1 through a positioning pin. A pivot rod 5 is fixedly connected to the connection seat structure 4. One end of the pivot rod 5 is fixedly connected to a detection arm assembly 6. A radial runout detection dial indicator assembly 7 is arranged on the detection arm assembly 6. An axial runout detection dial indicator assembly 8 is connected to one side of the detection arm assembly 6 through a connecting rod. The hub support assembly 3 is connected to a disc brake pad runout detection dial indicator assembly 9 through an adapter rod. The wheel set is fixedly supported by the hub support assembly 3, and then the wheel set is adjusted and detected by the radial runout detection dial indicator assembly 7, the axial runout detection dial indicator assembly 8 and the disc brake pad runout detection dial indicator assembly 9.

[0035] A part placement groove 11 is provided on the upper surface of the bottom plate 1. A magnet is fixedly connected to the bottom surface of the bottom plate 1. By using the magnetism of the magnet, some components are adsorbed. A semi-circular clearance groove 12 is provided on one side of the bottom plate 1, so that there is a wider activity space when rotating the handwheel 27, and the use is more comfortable. A rubber pad is provided on the bottom surface of the bottom plate 1. On the one hand, it can reduce the frictional noise generated by movement, and on the other hand, it makes the product place more stably.

[0036] The support base assembly 2 includes a left fixed seat 21 and a right fixed seat 22. A lower shaft rod 23 and an upper shaft rod 24 are fixedly connected between the left fixed seat 21 and the right fixed seat 22. The lower shaft rod 23 and the upper shaft rod 24 are spaced apart. A left - hand and right - hand threaded double - lead trapezoidal screw 25 is rotatably connected between the left fixed seat 21 and the right fixed seat 22. Linear bearings 26 are provided on both the lower shaft rod 23 and the upper shaft rod 24. One end of the left - hand and right - hand threaded double - lead trapezoidal screw 25 is fixedly connected to a handwheel 27. A central fixed seat 28 is provided between the left fixed seat 21 and the right fixed seat 22. Hub support assemblies 3 are symmetrically connected to both sides of the central fixed seat 28 through bearing fixing sleeves. Positioning and fine - tuning holes are provided on the left fixed seat 21, the right fixed seat 22, and the central fixed seat 28. A setscrew is provided on the central fixed seat 28. Rotating the handwheel 27 drives the left - hand and right - hand threaded double - lead trapezoidal screw 25 to rotate forward or backward, causing the hub support assemblies 3 to move synchronously. And the left - hand and right - hand threaded double - lead trapezoidal screw 25 has thick threads and a large pitch, with good smoothness, which can move the column 31 faster, improve work efficiency, and is more wear - resistant, improving the service life of the product. The positioning and fine - tuning holes can finely adjust the position of the upper shaft rod 24, reducing the problem of large shaking of the column 31 caused by the gap between the linear bearing 26 and the shaft rod.

[0037] The hub support assembly 3 includes columns 31 which are symmetrically arranged. A V - groove 32 is provided at the top of the columns 31. The V - groove 32 is fixedly connected to a V - shaped clamping block 33. A V - type groove is provided on the V - shaped clamping block 33. A fixing bolt is provided at one end of the V - type groove. The two sides of the wheel are clamped into the inverted V - type groove, and the wheel is fixed by using the fixing bolt on the V - type groove, which can fix the hub shaft rod and prevent it from loosening and shifting, affecting the wheel rim adjustment effect.

[0038] The connecting seat structure 4 includes a rotating support seat 41 and a fixed support seat 45. A pivot shaft 42 is fixedly connected between the rotating support seats 41. A pivot torsion spring 43 is provided on the pivot shaft 42. The pivot torsion spring 43 is fixedly connected to a pivot connecting rod 44. The fixed support seat 45 is threadedly connected to a knob ejector rod 46. One end of the knob ejector rod 46 contacts the pivot connecting rod 44. During the process of the knob ejector rod 46 rotating forward, one end of the pivot connecting rod 44 is squeezed, causing the pivot connecting rod 44 to rotate. The end of the pivot connecting rod 44 away from the knob ejector rod 46 is fixedly connected to a pivot rod 5. A shim group and a DU self - lubricating bearing are sleeved on the pivot shaft 42. The shim group enables the pivot connecting rod to perform fine - movement adjustment in the lateral position, which can correct the problem that the symmetry planes of the detection arm 62 and the V - shaped clamping block 33 are not aligned due to machining, assembly, and material deformation problems, improving the product precision. The DU self - lubricating bearing is closely fitted with the pivot shaft 42 with only a tiny gap, and the pivot shaft 42 can still lubricate and rotate, improving the product precision. Because the surface coating of the DU self - lubricating bearing has good wear resistance and corrosion resistance, the service life of the product is also improved.

[0039] The detection arm assembly 6 includes an adapter base 61. The adapter base 61 is symmetrically connected to the detection arms 62 through torsion springs. One end of the adapter base 61 away from the detection arms 62 is provided with an adjusting ejector rod 63. One end of the adjusting ejector rod 63 penetrates through the connection part of the adapter base 61 and contacts the detection arms 62. The adapter base 61 is provided with a T-shaped chute. One end of the detection arm 62 away from the adapter base 61 is connected with a plastic sleeve through interference fit. The advancement of the adjusting ejector rod 63 pushes between the two detection arms 62, so that the distance between the front ends of the two detection arms 62 becomes larger, and the mouths of the two detection arms 62 are aligned with the edge of the rim. Rotate the rim and observe whether the distances between the rim edge and the two plastic sleeves are uniform. Make corresponding adjustments where it is not uniform until the whole circle is uniform, that is, the rough adjustment of the rim is completed.

[0040] The radial runout detection dial indicator assembly 7 includes a slider 76. The slider 76 is slidably connected to the T-shaped chute. A dial base 71 is fixedly connected to the slider 76. The dial base 71 is provided with a strip-shaped hole, and a locking screw 72 is provided on the strip-shaped hole. One end of the dial base 71 is fixedly connected to a radial runout dial indicator 73. A connecting seat 74 is provided at the detection end of the radial runout dial indicator 73. A roller 75 is rotatably connected to the connecting seat 74. Using the roller 75 for rolling friction can reduce the noise generated by the friction between the dial indicator and the rim. On the other hand, it can also protect the rim and the dial indicator from being damaged by friction and improve the product performance.

[0041] The axial runout detection dial indicator assembly 8 and the disc brake pad runout detection dial indicator assembly 9 have the same structure. The axial runout detection dial indicator assembly 8 and the disc brake pad runout detection dial indicator assembly 9 both include a dial indicator. The detection end of the dial indicator is fixedly connected to a roller seat, and a roller 75 is rotatably connected to the roller seat.

[0042] Working principle: When in use, it is carried out in 4 steps:

[0043] The first step, rotate the handwheel 27 to drive the left and right hand threaded double trapezoidal screw 25 to rotate. The column 31 moves closer to or away from synchronously at the same time. At the same time, the V-shaped clamp 33 also moves accordingly. Adjust the handwheel 27 to make the V-shaped clamp 33 clamp the two ends of the axle rod of the wheel set hub; rotate the fixing bolt to slightly press and fix the hub axle rod to prevent it from loosening and shifting and affecting the rim adjustment effect;

[0044] The second step, rotate the knob ejector rod 46 to push the pivot connecting rod 44 to move, and adjust the angle A of the pivot rod 5. The detection arm assembly 6, the radial runout detection dial indicator assembly 7, and the axial runout detection dial indicator assembly 8 also rotate and move accordingly. Rotate the knob ejector rod 46 to make the plastic sleeve on the detection arm 62 at the same height as the rim. Rotate the adjusting ejector rod 63 to adjust the distance between the plastic sleeves on the two detection arms 62 so that their mouths are aligned with the edge of the rim. Rotate the rim and observe whether the distances between the rim edge and the two plastic sleeves are uniform. Make corresponding adjustments where it is not uniform until the whole circle is uniform, that is, the rough adjustment of the rim is completed;

[0045] In the third step, adjust the locking screw 72 on the radial runout detection dial indicator assembly 7, move the radial runout dial indicator 73, and make the roller 75 press against the outer circle of the wheel rim; adjust the axial runout detection dial indicator assembly 8, move the dial indicator, and make the roller 75 press against the side surface of the wheel rim. Rotate the wheel rim, observe the runout of the dial indicators of the moving radial runout dial indicator 73 and the axial runout detection dial indicator assembly 8, and make fine adjustments to the hub until the runout of the two dial indicators is controlled within a reasonable range, thus completing the fine adjustment of the wheel rim.

[0046] In the fourth step, adjust the disc brake pad runout detection dial indicator assembly 9, move the adjusting dial indicator, and make the roller press against the end face of the disc brake pad. Rotate the disc, observe the runout of the dial indicator of the disc brake pad runout detection dial indicator assembly 9, and make corrective fine adjustments to the disc until the runout of the dial indicator is controlled within a reasonable range, thus completing the fine adjustment of the disc.

[0047] Finally, it should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bicycle spoke truing stand, comprising a bottom plate (1), characterized in that: The support base assembly (2) is connected to the bottom plate (1) through a positioning pin. A hub support assembly (3) is fixedly arranged on the support base assembly (2). The connecting seat structure (4) is connected to the bottom plate (1) through a positioning pin. A turning point rod (5) is fixedly connected to the connecting seat structure (4). One end of the turning point rod (5) is fixedly connected to the detection arm assembly (6). A radial runout detection dial indicator assembly (7) is arranged on the detection arm assembly (6). An axial runout detection dial indicator assembly (8) is connected to one side of the detection arm assembly (6) through a connecting rod. The hub support assembly (3) is connected to the disc brake pad runout detection dial indicator assembly (9) through an adapter rod.

2. The bicycle spoke truing stand according to claim 1, characterized in that: A part placement groove (11) is arranged on the upper surface of the bottom plate (1). A magnet is fixedly connected to the bottom surface of the bottom plate (1). A semi-circular clearance groove (12) is arranged on one side of the bottom plate (1). A rubber pad is arranged on the bottom surface of the bottom plate (1).

3. A bicycle rim truing stand according to claim 1, characterized in that: The support base assembly (2) includes a left fixed seat (21) and a right fixed seat (22). A lower shaft rod (23) and an upper shaft rod (24) are fixedly connected between the left fixed seat (21) and the right fixed seat (22). Between the lower shaft rod (23) and the upper shaft rod (24) at intervals, a left-hand and right-hand double-threaded trapezoidal screw (25) is rotatably connected between the left fixed seat (21) and the right fixed seat (22). Linear bearings (26) are arranged on both the lower shaft rod (23) and the upper shaft rod (24). One end of the left-hand and right-hand double-threaded trapezoidal screw (25) is fixedly connected to a handwheel (27). A central fixed seat (28) is arranged between the left fixed seat (21) and the right fixed seat (22). The hub support assembly (3) is connected to both sides of the central fixed seat (28) through bearing fixing sleeves. Positioning and fine-tuning holes are arranged on the left fixed seat (21), the right fixed seat (22), and the central fixed seat (28). A setscrew is arranged on the central fixed seat (28).

4. A spoke truing stand for a bicycle according to claim 1, wherein: The hub support assembly (3) includes columns (31). The columns (31) are symmetrically arranged. A V-groove (32) is arranged at the top of the columns (31). The V-groove (32) is fixedly connected to a V-shaped clamp block (33). A V-shaped groove is arranged on the V-shaped clamp block (33). A fixing bolt is arranged at one end of the V-shaped groove.

5. A bicycle spoke truing stand according to claim 1, wherein: The connecting seat structure (4) includes a rotating support seat (41) and a fixed support seat (45). A turning point shaft (42) is fixedly connected between the rotating support seats (41). A turning point torsion spring (43) is arranged on the turning point shaft (42). The turning point torsion spring (43) is fixedly connected to a turning point connecting rod (44). The fixed support seat (45) is threadedly connected to a knob ejector rod (46). One end of the knob ejector rod (46) contacts the turning point connecting rod (44). The end of the turning point connecting rod (44) away from the knob ejector rod (46) is fixedly connected to the turning point rod (5). A spring plate group and a DU self-lubricating bearing are sleeved on the turning point shaft (42).

6. The bicycle rim truing stand according to claim 1, wherein: The detection arm assembly (6) includes an adapter base (61). The adapter base (61) is symmetrically connected to the detection arms (62) through torsion springs. One end of the adapter base (61) away from the detection arms (62) is provided with an adjusting ejector rod (63). One end of the adjusting ejector rod (63) penetrates through the connection part of the adapter base (61) and contacts the detection arms (62). The adapter base (61) is provided with a T-shaped chute. One end of the detection arms (62) away from the adapter base (61) is connected with a plastic sleeve through interference fit.

7. A bicycle spoke tensioning stand according to claim 1, wherein: The radial runout detection dial indicator assembly (7) includes a slider (76). The slider (76) is slidably connected to the T-shaped chute. A dial indicator base (71) is fixedly connected to the slider (76). A strip hole is provided on the dial indicator base (71). A locking screw (72) is provided on the strip hole. One end of the dial indicator base (71) is fixedly connected to a radial runout dial indicator (73). A connection seat (74) is provided at the detection end of the radial runout dial indicator (73). A roller (75) is rotatably connected to the connection seat (74).

8. A bicycle rim truing stand according to claim 1, wherein: The axial runout detection dial indicator assembly (8) and the disc brake pad runout detection dial indicator assembly (9) have the same structure. Both the axial runout detection dial indicator assembly (8) and the disc brake pad runout detection dial indicator assembly (9) include a dial indicator. The detection end of the dial indicator is fixedly connected to a roller seat. A roller (75) is rotatably connected to the roller seat.

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