High strength wheel roundness correction apparatus

Abstract

The utility model relates to a kind of high-strength correction equipment of wheel rim roundness, including workbench plate and fixture support plate, the central position of workbench plate is equipped with the rectification driving element that can vertically slide, several slide grooves are equipped in fixture support plate and the rectification sliding block that can slide in each slide groove is equipped, the lower portion of workbench plate is equipped with oil cylinder and connecting rod support plate, several connecting rod mechanisms with bending and straightening form are hinged between the surface of connecting rod support plate and the lower surface of workbench plate, the piston rod end of oil cylinder is connected with connecting rod driving plate, connecting rod driving plate is hingedly connected between each connecting rod mechanism, and connecting rod driving plate is connected on rectification driving element;The utility model converts the thrust of oil cylinder into huge downward tension to inclined groove sliding core by connecting rod mechanism, to drive rectification sliding block to generate synchronous, uniform and powerful radial expansion force, to force thick-walled or high-strength wheel rim to occur accurate plastic deformation, realize high-precision roundness correction.

Description

Technical Field

[0001] This utility model relates to the field of bicycle rim production technology, specifically to a high-strength correction device for bicycle rim roundness. Background Technology

[0002] In the manufacturing process of bicycle rims, aging heat treatment is a crucial step that effectively improves the overall mechanical properties of the material, giving the workpiece higher strength and dimensional stability. However, during this heat treatment process, due to the release and redistribution of internal stresses, the rim is prone to roundness deformation, causing its geometry to deviate from a perfect circle. If this minute deformation is left untreated, it will directly affect subsequent assembly accuracy and the final product's performance and safety. To effectively ensure and improve product quality, it is essential to add a dedicated straightening process after aging heat treatment. This straightening process applies precise force to the deformed rim, restoring its roundness to within the design tolerance range.

[0003] The authorization announcement number CN216175810U discloses a clamping mechanism for a wheel rim expansion machine. According to its specification and drawings, the hydraulic cylinder pushes the lifting guide column frame to move up and down, which in turn moves the lifting main shaft fixed at the center of the upper lifting plate up and down, thereby driving the connected conical platform to move up and down. The horizontal expansion and contraction movement of the expansion slider assembly is realized through the sliding of the conical surface, and the shape of the wheel rim is shaped and corrected through the working surface of the shaping mold.

[0004] However, there are still some limitations in the solution: for wheel rims with a wider wall thickness, the reaction force exerted on the expansion slider assembly by the forming mold will be greater during the correction process. This force will eventually be transmitted to the conical surface of the conical platform, forming an axial force that pushes the conical platform upward. This upward axial force must be countered by the piston rod of the hydraulic cylinder. Therefore, in some cases, the hydraulic cylinder cannot provide enough tension to maintain stable support for the lifting guide column. Summary of the Invention

[0005] This invention addresses the problem of roundness correction in bicycle rims by proposing a high-strength roundness correction device. It generates a huge downward pulling force on the inclined groove slide core, thereby driving the correction slider to generate synchronous, uniform and powerful radial expansion force, which forces the thick-walled or high-strength rim to undergo precise plastic deformation, thus achieving high-precision roundness correction.

[0006] The objective of this invention is achieved through the following technical solution: a high-strength correction device for the roundness of bicycle rims, comprising a worktable, a clamp support plate mounted on the worktable, a vertically sliding correction drive component located at the center of the worktable, a plurality of grooves within the clamp support plate, and a correction slider slidably mounted in each groove, wherein the radial thrust generated by the change in height of the correction drive component gradually pushes the sidewall of the correction slider to fit against the inside of the bicycle rim, and a hydraulic cylinder and a vertically movable connecting rod support are located below the worktable. The plate has several connecting rod mechanisms with bending and straightening forms hinged between the surface of the connecting rod support plate and the lower surface of the worktable. The piston rod end of the hydraulic cylinder is connected to a connecting rod drive plate, which is hinged to each connecting rod mechanism. The connecting rod drive plate is connected to the straightening drive component. The height change of the connecting rod drive plate relative to the worktable can drive the connecting rod mechanism to be in a bending or straightening state. When the connecting rod mechanism is in the straightening state, it can pull the straightening drive component through the connecting rod drive plate to generate sufficient support force for the straightening slider.

[0007] Preferably, the correcting drive includes a slanted groove slide core and a slide core support rod. The gap between the ends of a plurality of correcting sliders near the axis of the slide core support rod forms a conical gap adapted to the slanted groove slide core. The sidewall shape of each correcting slider is adapted to the internal shape of the wheel rim. After the outer surface of the slanted groove slide core is fitted into the conical gap, it can squeeze each correcting slider to correct the roundness of the wheel rim. The bottom of the slide core support rod is connected to the connecting rod drive plate. This setting can transform the single vertical linear motion of the straightening drive component into the horizontal radial motion of all straightening sliders, ensuring the uniform distribution of the expansion force of the straightening sliders and avoiding new deformation of the rim due to uneven force. At the same time, the shape of the straightening slider sidewall matches the internal shape of the rim, ensuring the effective transmission of the straightening force and the final forming accuracy, making the rim roundness correction effect more ideal.

[0008] Preferably, each linkage mechanism includes a first hinge support, a second hinge support, a first link arm, and a plurality of second link arms. The first hinge support and the second hinge support are respectively connected to the lower surface of the worktable and the surface of the link support plate. The interior of the first hinge support is hinged to one end of the first link arm, and the other end of the first link arm is hinged to the gap between the plurality of second link arms. The two ends of the second link arm are also respectively hinged to the second hinge support and the link drive plate.

[0009] Preferably, the first linkage arm is rectangular in the middle and semi-circular at both ends. The interior of the first linkage arm near the first hinge support is also provided with a triangular protrusion for limiting the rotation angle between the first linkage arm and the lower surface of the worktable. The second linkage arm includes a first rod and a second rod that are perpendicular to each other and integrally connected. The end of the first rod is hinged to the second hinge support, and the end of the second rod is hinged to the linkage drive plate. The junction of the first rod and the second rod is hinged to the end of the first linkage arm.

[0010] Preferably, the connecting rod support plate is further provided with a plurality of first guide rod support seats inside, each first guide rod support seat is slidably connected to a first guide rod body inside, the top of each first guide rod body is connected to the lower surface of the worktable, the bottom of each first guide rod body is connected to a hydraulic cylinder support plate, the hydraulic cylinder is connected to the hydraulic cylinder support plate through a fixing plate, and the bottom of the first guide rod body is provided with a first locking sleeve that fits against the lower surface of the hydraulic cylinder support plate.

[0011] Preferably, the piston rod end of the cylinder is provided with a piston rod connector through the interior of the connecting rod support plate, the middle part of the connecting rod support plate is provided with a circular through hole for avoiding the piston rod connector, and the connecting rod drive plate is provided at the end of the piston rod connector.

[0012] Preferably, a plurality of third link arms are hinged to the surface of the link drive plate, and the end of each third link arm is hinged to an adjacent second link. This third link arm configuration allows the link drive plate to apply the thrust to the second link arm in a better position, enabling more efficient and smoother rotation of the second link arm around its hinge point.

[0013] Preferably, the bottom of the sliding core support rod is further provided with a sliding core drive plate, and the bottom of the sliding core support rod is provided with a second locking sleeve that fits against the lower surface of the sliding core drive plate. The connecting rod drive plate is provided with a plurality of second guide rod support seats inside, and a second guide rod body is slidably connected inside each second guide rod support seat. The bottom of each second guide rod body passes through the interior of the connecting rod support plate and the end is provided with a third locking sleeve that fits against the lower surface of the connecting rod support plate. The top of each second guide rod body is connected to the sliding core drive plate and the top of the second guide rod body is provided with a fourth locking sleeve that fits against the upper surface of the sliding core drive plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This equipment converts vertical linear motion into horizontal radial expansion motion by using the tapered gap between the inclined groove slide core of the correction drive component and the correction slider. This ensures that the correction slider expands outward synchronously and at equal intervals, pressing evenly against the inner wall of the wheel rim, effectively correcting non-roundness problems such as ellipticity or local depressions. 2. The linkage mechanism includes a first hinge support, a second hinge support, a first linkage arm, and a second linkage arm. The linkage drive plate is driven by a hydraulic cylinder, allowing the linkage mechanism to switch between bending and straightening states. Simultaneously, the linkage mechanism generates a strong tensile force in the straightening state, which is transmitted to the straightening drive component through the linkage support plate and the second guide rod body. This linkage amplification mechanism significantly improves the straightening force, enabling the straightening slider to force the rim to undergo plastic deformation, achieving a complete fit even for high-strength rims. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention.

[0016] The diagram shows the following components: 1. Workbench; 2. Fixture support plate; 3. Correction drive component; 31. Inclined groove slide core; 32. Slide core support rod; 33. Slide core drive plate; 34. Second locking sleeve; 35. Fourth locking sleeve; 4. Correction slider; 41. Tapered gap; 5. Hydraulic cylinder; 51. Piston rod connector; 52. Hydraulic cylinder support plate; 6. Connecting rod support plate; 61. First guide rod support seat; 62. First guide rod body; 63. First locking sleeve; 7. Linkage mechanism; 71. First hinge support seat; 72. Second hinge support seat; 73. First connecting arm; 731. Triangular protrusion; 74. Second connecting arm; 741. First rod body; 742. Second rod body; 8. Connecting rod drive plate; 80. Third connecting arm; 81. Second guide rod support seat; 82. Second guide rod body; 83. Third locking sleeve. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1 and Figure 2 As shown, a high-strength correction device for the roundness of a bicycle rim includes a worktable 1 and a clamp support plate 2 disposed on the worktable 1. A correction drive 3 capable of vertical sliding is provided at the center of the worktable 1. The clamp support plate 2 is provided with a plurality of grooves, and a correction slider 4 is slidably disposed in each groove. When the height of the correction drive 3 changes, the radial thrust generated pushes the side wall of the correction slider 4 to gradually fit against the inside of the bicycle rim. The clamp support plate 2 is also equipped with a compression spring for resetting. Whenever the straightening slider 4 is squeezed and pushed by the straightening drive 3 and slides outward, the compression spring will deform and reset the straightening slider 4 to the initial position when the straightening slider 4 is not squeezed.

[0018] Please continue to refer to the reference. Figure 3 The corrective drive component 3 includes a slanted groove slide core 31 and a slide core support rod 32. The gap between the ends of a plurality of corrective sliders 4 near the axis of the slide core support rod 32 forms a conical gap 41 adapted to the slanted groove slide core 31. The sidewall shape of each corrective slider 4 is adapted to the internal shape of the wheel rim. After the outer surface of the slanted groove slide core 31 is attached to the inside of the conical gap 41, it can squeeze each corrective slider 4 to correct the roundness of the wheel rim. As the straightening drive 3 slides downward, the inclined groove slide core 31 gradually fits into the inside of the conical gap 41. As the straightening drive 3 continues to slide downward, the inclined groove slide core 31 continuously squeezes the end of each straightening slider 4, converting the vertical linear motion into a horizontal radial expansion motion through the conical surface engagement. This causes each straightening slider 4 to deviate towards the axial direction of the slide core support rod 32. The straightening slider 4 overcomes the resistance generated by the compression spring, and each straightening slider 4 expands synchronously and equidistantly into the inside of the wheel rim along the groove in the clamp support plate 2. As the straightening slider 4 expands outward, the sidewall shape of the straightening slider 4 will press evenly against the inner wall of the rim. If the rim is not round, such as being elliptical or having local depressions, the straightening slider 4 will cause it to undergo plastic deformation until the inner wall of the rim and the sidewall shape of the straightening slider 4 are completely fitted together.

[0019] In this embodiment, a hydraulic cylinder 5 and a connecting rod support plate 6 capable of moving up and down are provided below the worktable 1. Several connecting rod mechanisms 7 with bending and straightening forms are hinged between the surface of the connecting rod support plate 6 and the lower surface of the worktable 1. The piston rod end of the hydraulic cylinder 5 is connected to a connecting rod drive plate 8. The connecting rod drive plate 8 is hinged to each connecting rod mechanism 7. The bottom of the sliding core support rod 32 is connected to the connecting rod drive plate 8. Whenever the height of the linkage drive plate 8 relative to the worktable plate 1 changes, the linkage drive plate 8 can drive the linkage mechanism 7 to be in a bent or straightened state. When the linkage mechanism 7 is in a straightened state, it can pull the straightening drive component 3 through the linkage drive plate 8 to generate sufficient support force for the straightening slider 4. Please refer to Figure 2 and Figure 3As shown, each linkage mechanism 7 includes a first hinge support 71, a second hinge support 72, a first linkage arm 73, and a plurality of second linkage arms 74. The first hinge support 71 and the second hinge support 72 are respectively connected to the lower surface of the worktable 1 and the surface of the linkage support plate 6. The interior of the first hinge support 71 is hinged to one end of the first linkage arm 73, and the other end of the first linkage arm 73 is hinged to the gap between the plurality of second linkage arms 74. The two ends of the second linkage arms 74 are also respectively hinged to the second hinge support 72 and the linkage drive plate 8. Furthermore, the first linkage arm 73 is rectangular in the middle and semi-circular at both ends. The interior of the first linkage arm 73 near the first hinge support 71 is also provided with a triangular protrusion 731 to limit the rotation angle between the first linkage arm 73 and the lower surface of the worktable 1. The second linkage arm 74 includes a first rod 741 and a second rod 742 that are perpendicular to each other and integrally connected. The end of the first rod 741 is hinged to the second hinge support 72, and the end of the second rod 742 is hinged to the linkage drive plate 8. The junction of the first rod 741 and the second rod 742 is hinged to the end of the first linkage arm 73. A plurality of third linkage arms 80 are hinged within the surface of the linkage drive plate 8, and the end of each third linkage arm 80 is hinged to the junction of the first rod 741 and the second rod 742. like Figure 3 As shown, the linkage support plate 6 is at the top of the set position relative to the worktable plate 1. At this time, the top of the triangular protrusion 731 on the first linkage arm 73 is in contact with the inside of the first hinge support seat 71, so that the first linkage arm 73 cannot continue to rotate counterclockwise. Therefore, the second linkage arm 74 hinged to the first linkage arm 73 cannot rotate. At this time, the entire linkage mechanism 7 is in the set bending state. Whenever it is necessary to switch to the straightened state, the piston rod end of the hydraulic cylinder 5 extends upward, thereby driving the connecting rod drive plate 8 to move upward; the hinge point of the connecting rod drive plate 8 and the third connecting rod arm 80 moves upward, causing the third connecting rod arm 80 to rotate at the hinge point of the connecting rod drive plate 8. During the change of angle of the third connecting rod arm 80, a thrust is applied to the hinge point between the third connecting rod arm 80 and the second rod body 742; under this thrust, the bottom of the first rod body 741 rotates around the inside of the second hinge support seat 72; at the same time, the hinge point of the first rod body 741 and the second rod body 742 applies a rotational thrust to the first connecting rod arm 73, and the first connecting rod arm 73 rotates relative to the inside of the first hinge support seat 71; until the side wall of the first rod body 741 and the side wall of the first connecting rod arm 73 are in a parallel state. At this point, a strong tensile force is generated between the first rod body 741 and the first connecting rod arm 73. This force is transmitted to the connecting rod support plate 6, which is fixedly connected to the second hinged support seat 72, forcing the connecting rod support plate 6 to move downwards. During this downward movement, the connecting rod support plate 6 transmits this strong tensile force to the end of the sliding core support rod 32, causing the sliding core support rod 32 to move downwards under this strong tensile force. For wheel rims with a wider wall thickness, the force exerted on the straightening slider 4 through the inclined groove sliding core 31 will be even greater during the straightening process. The force on the straightening slider 4 will eventually reach the inside of the rim. The inclined groove slide core 31 and the slide core support rod 32 are subjected to the axial reaction force of the straightening slider 4. The strong pulling force generated by each set of linkage mechanisms 7 is used to overcome this force, further ensuring that during the outward expansion of the straightening slider 4, the side wall shape of the straightening slider 4 will press strongly and evenly against the inner wall of the rim. If the rim has an ellipse, local concavity, or other non-circular conditions, the straightening slider 4 will force it to undergo plastic deformation until the inner wall of the rim with a wider wall thickness completely fits the side wall shape of the straightening slider 4.

[0020] Please refer to the reference. Figure 2 and Figure 4 In this embodiment, to further illustrate how the connecting rod support plate 6 moves up and down relative to the bottom of the worktable 1, the connecting rod support plate 6 is further provided with a plurality of first guide rod support seats 61. Each first guide rod support seat 61 is slidably connected to a first guide rod body 62. The top of each first guide rod body 62 is connected to the lower surface of the worktable 1, and the bottom of each first guide rod body 62 is connected to a hydraulic cylinder support plate 52. The hydraulic cylinder 5 is connected to the hydraulic cylinder support plate 52 through a fixing plate. The bottom of the first guide rod body 62 is provided with a first locking sleeve 63 that fits against the lower surface of the hydraulic cylinder support plate 52. The piston rod end of the oil cylinder 5 passes through the interior of the connecting rod support plate 6 and is provided with a piston rod connector 51. The middle part of the connecting rod support plate 6 is provided with a circular through hole for avoiding the piston rod connector 51. The connecting rod drive plate 8 is fixedly connected to the end of the piston rod connector 51. With this configuration, as the connecting rod support plate 6 moves up and down relative to the bottom of the worktable plate 1, the first guide rod support seat 61 on the connecting rod support plate 6 moves simultaneously. During the movement, the first guide rod support seat 61 always slides along the surface of the first guide rod body 62. The first guide rod body 62 plays a supporting and guiding role in the sliding process of the first guide rod support seat 61 and the connecting rod support plate 6. It should be further explained that the bottom of the sliding core support rod 32 is also fixedly connected to the sliding core drive plate 33. The bottom of the sliding core support rod 32 is provided with a second locking sleeve 34 that fits against the lower surface of the sliding core drive plate 33. The inside of the connecting rod drive plate 8 is provided with a plurality of second guide rod support seats 81. The inside of each second guide rod support seat 81 is slidably connected to a second guide rod body 82. The bottom of each second guide rod body 82 passes through the inside of the connecting rod support plate 6 and the end is provided with a third locking sleeve 83 that fits against the lower surface of the connecting rod support plate 6. The top of each second guide rod body 82 is connected to the sliding core drive plate 33 and the top of the second guide rod body 82 is provided with a fourth locking sleeve 35 that fits against the upper surface of the sliding core drive plate 33. Please refer to the reference. Figure 4 During implementation, whenever the connecting rod drive plate 8 needs to be moved upward, the piston rod of the hydraulic cylinder 5 extends and drives the connecting rod drive plate 8 upward through the piston rod connector 51. At this time, the second guide rod support seat 81 on the connecting rod drive plate 8 slides along the surface of the second guide rod body 82 during the movement. The second guide rod body 82 plays a supporting and guiding role in the sliding process of the second guide rod support seat 81 and the connecting rod drive plate 8. When the connecting rod drive plate 8 moves upward, it does not directly drive the sliding core drive plate 33. Because the connecting rod support plate 6 moves downward during the process described above, and the fourth locking sleeve 35 at the top of the second guide rod body 82 restricts its downward movement, while the third locking sleeve 83 at the bottom restricts its upward movement, the downward movement of the connecting rod support plate 6 simultaneously drives the third locking sleeve 83 downward. Furthermore, the second guide rod body 82 is locked by the fourth locking sleeve 35. Therefore, the downward force of the connecting rod support plate 6 is transmitted through the four second guide rod bodies 82 and the fourth locking sleeve 35. At the same time, it drives the sliding core drive plate 33 and the sliding core support rod 32 to move downwards. This structure successfully transmits the strong pulling force generated by the linkage mechanism 7 to the correction drive component 3.

[0021] Working principle and usage of this utility model: When the hydraulic cylinder 5 is activated, its piston rod extends upward, pushing the connecting rod drive plate 8 to move upward.

[0022] The upward movement of the linkage drive plate 8 applies a thrust to the connection of the second linkage arm 74 (composed of the first rod 741 and the second rod 742) through the third linkage arm 80 which is hinged to it.

[0023] This thrust forces the second link arm 74 and the first link arm 73 to begin rotating. As the triangular protrusion 731 on the first link arm 73 gradually separates from the inner wall of the first hinge support 71, the entire linkage mechanism 7 moves from a bent state to a straightened state. This process generates a force amplification effect, forming a stable and powerful tension.

[0024] The linkage mechanism 7 converts the upward thrust of the linkage drive plate 8 into a huge downward pull. This pull is transmitted through the linkage support plate 6, the second guide rod body 82 and the slide core drive plate 33, and finally to the slide core support rod 32, forcing the entire correction drive component 3 to move downward forcefully.

[0025] As the corrective drive 3 moves downward, the inclined groove slide core 31 at its top gradually embeds into the tapered gap 41 formed by the ends of multiple corrective sliders 4.

[0026] The inclined surface of the inclined groove slide core 31 interacts with the conical surface of the conical gap 41, precisely converting the vertically downward linear motion into horizontal radial motion of each correcting slider 4 within the groove of the clamp support plate 2. All correcting sliders 4 overcome the resistance of the compression spring and expand outward synchronously and equidistantly.

[0027] The outwardly expanding straightening sliders 4 have sidewalls that perfectly match the shape of the ideal inner wall of the rim. They press evenly and forcefully against the inner wall of the rim. If the rim has oval shapes, local depressions, or other non-round features, under immense concentrated pressure, the non-round parts will undergo plastic deformation until their inner walls completely conform to the shape of all the straightening sliders 4. At this point, the roundness of the rim is corrected. After correction, the piston rod of the hydraulic cylinder 5 retracts, causing the connecting rod drive plate 8 to move downwards, and the connecting rod mechanism 7 returns to its bent state.

[0028] The downward pull on the straightening drive component 3 disappears. Under the reset action of the internal compression spring, the straightening slider 4 retracts inward along the groove, disengages from the inner wall of the wheel rim, and returns to its initial position. At this point, the straightened wheel rim can be removed.

[0029] 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 use 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 high-strength correction device for wheel rim roundness, comprising a worktable (1) and a clamp support plate (2) disposed on the worktable (1), characterized in that, The worktable (1) is provided with a vertically sliding correction drive (3) at its center. The fixture support plate (2) is provided with several grooves, and a correction slider (4) is provided in each groove. When the height of the correction drive (3) changes, the radial thrust generated pushes the side wall of the correction slider (4) to gradually fit against the inside of the wheel rim. The worktable (1) is provided with a hydraulic cylinder (5) and a linkage support plate (6) that can move up and down. The surface of the linkage support plate (6) is hinged to the lower surface of the worktable (1) with several bending and stretching joints. The straight-shaped linkage mechanism (7) has a connecting rod drive plate (8) connected to the piston rod end of the cylinder (5). The connecting rod drive plate (8) is hinged to each linkage mechanism (7). The connecting rod drive plate (8) is connected to the straightening drive member (3). The height change of the connecting rod drive plate (8) relative to the worktable (1) can drive the linkage mechanism (7) to be in a bent or straightened state. When the linkage mechanism (7) is in a straightened state, it can pull the straightening drive member (3) through the connecting rod drive plate (8) to generate sufficient support force on the straightening slider (4).

2. The high-strength roundness correction device for bicycle rims according to claim 1, characterized in that, The correcting drive component (3) includes a slanted groove slide core (31) and a slide core support rod (32). The gap between the ends of a plurality of correcting sliders (4) near the axis of the slide core support rod (32) forms a tapered gap (41) adapted to the slanted groove slide core (31). The sidewall shape of each correcting slider (4) is adapted to the internal shape of the wheel rim. After the outer surface of the slanted groove slide core (31) is attached to the inside of the tapered gap (41), it can squeeze each correcting slider (4) to correct the roundness of the wheel rim. The bottom of the slide core support rod (32) is connected to the connecting rod drive plate (8).

3. The high-strength roundness correction device for bicycle rims according to claim 2, characterized in that, Each of the linkage mechanisms (7) includes a first hinge support (71), a second hinge support (72), a first link arm (73), and a plurality of second link arms (74). The first hinge support (71) and the second hinge support (72) are respectively connected to the lower surface of the worktable (1) and the surface of the link support plate (6). The interior of the first hinge support (71) is hinged to one end of the first link arm (73), and the other end of the first link arm (73) is hinged to the gap between the plurality of second link arms (74). The two ends of the second link arms (74) are also respectively hinged to the second hinge support (72) and the link drive plate (8).

4. The high-strength roundness correction device for bicycle rims according to claim 3, characterized in that, The first linkage arm (73) is rectangular in the middle and semi-circular at both ends. The first linkage arm (73) is also provided with a triangular protrusion (731) near the first hinge support (71) to limit the rotation angle between the first linkage arm (73) and the lower surface of the worktable (1). The second linkage arm (74) includes a first rod (741) and a second rod (742) that are perpendicular to each other and integrally connected. The end of the first rod (741) is hinged to the second hinge support (72), and the end of the second rod (742) is hinged to the linkage drive plate (8). The connection between the first rod (741) and the second rod (742) is hinged to the end of the first linkage arm (73).

5. The high-strength roundness correction device for bicycle rims according to claim 4, characterized in that, The connecting rod support plate (6) is further provided with a number of first guide rod support seats (61). Each first guide rod support seat (61) is slidably connected to a first guide rod body (62). The top of each first guide rod body (62) is connected to the lower surface of the worktable plate (1). The bottom of each first guide rod body (62) is connected to a cylinder support plate (52). The cylinder (5) is connected to the cylinder support plate (52) through a fixing plate. The bottom of the first guide rod body (62) is provided with a first locking sleeve (63) that fits against the lower surface of the cylinder support plate (52).

6. The high-strength roundness correction device for bicycle rims according to claim 5, characterized in that, The piston rod end of the cylinder (5) passes through the interior of the connecting rod support plate (6) and is provided with a piston rod connector (51). The middle part of the connecting rod support plate (6) is provided with a circular through hole for avoiding the piston rod connector (51). The connecting rod drive plate (8) is located at the end of the piston rod connector (51).

7. The high-strength roundness correction device for bicycle rims according to claim 6, characterized in that, A plurality of third link arms (80) are hinged in the surface of the link drive plate (8), and the end of each third link arm (80) is hinged between adjacent second rods (742).

8. The high-strength roundness correction device for bicycle rims according to claim 2, characterized in that, The bottom of the sliding core support rod (32) is also provided with a sliding core drive plate (33). The bottom of the sliding core support rod (32) is provided with a second locking sleeve (34) that fits against the lower surface of the sliding core drive plate (33). The inside of the connecting rod drive plate (8) is provided with a plurality of second guide rod support seats (81). The inside of each second guide rod support seat (81) is slidably connected to a second guide rod body (82). The bottom of each second guide rod body (82) passes through the inside of the connecting rod support plate (6) and the end is provided with a third locking sleeve (83) that fits against the lower surface of the connecting rod support plate (6). The top of each second guide rod body (82) is connected to the sliding core drive plate (33) and the top of the second guide rod body (82) is provided with a fourth locking sleeve (35) that fits against the upper surface of the sliding core drive plate (33).

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