Bicycle hub accessory production device

Abstract

The invention relates to the technical field of bicycle accessory machining, in particular to a bicycle hub accessory production device. The hub grinding device comprises a grinding shaft with the outer diameter smaller than the inner diameter of a hub, a mounting cavity is formed in the grinding shaft, and a grinding mechanism and a detection rod which slide in the radial direction of the grinding shaft are arranged in the mounting cavity; the grinding mechanism and the detection rod are oppositely arranged, and one end of the grinding mechanism and one end of the detection rod slidably penetrate through the grinding shaft. The polishing mechanism has a low-position polishing state and a high-position polishing state; according to the bicycle hub accessory production device, the slidable sliding rod and the detection rod are arranged at the end of the grinding shaft, the position of the grinding mechanism is adjusted through centrifugal force generated by rotation of the grinding shaft, a grinding block at the end of the sliding rod can adapt to the inner walls of different diameters, and one-time grinding of the interior of a hub is achieved; and the grinding frequency of a single hub is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle accessory processing, in particular to a bicycle hub accessory production device. Background Art

[0002] The hub, commonly known as the "hub barrel", is used to connect the axle and spokes of a bicycle, and is usually called the hub skin. Depending on the number of spokes, there are generally 3-way and 5-way arrangements. There are two types of hubs: iron hubs and aluminum hubs.

[0003] During the production process of bicycle hubs, the inner diameter of the hubs needs to be polished. The traditional polishing method usually uses a polishing roller, the outer diameter of which is the same as the inner diameter of the hub, and the inner diameter of the hub is polished by extending the rotating polishing roller into the interior of the hub.

[0004] However, there are two types of internal structures of the hub: one is that the inner diameters of the various parts of the hub are the same, and the bearings are directly installed at both ends of the hub, and the bearings are limited by the limiting mechanism in the later stage; the other is that the inner diameters of the various parts of the hub are different, and the two ends of the hub are reserved with bearing cavities for installing bearings. The inner diameter of the bearing cavity is larger than the inner diameter of the middle cavity of the hub, and the bearing is limited by the reserved bearing cavity. When it is necessary to grind hubs with different inner diameters, the traditional grinding method needs to be carried out in two times, and each time a grinding roller with a different diameter needs to be used, which affects the grinding efficiency of the hub. Summary of the invention

[0005] The object of the present invention is to provide a bicycle hub accessory production device to solve the problems raised in the above background technology.

[0006] To achieve the above object, a bicycle hub accessory production device is provided, comprising a grinding shaft with an outer diameter smaller than the inner diameter of the hub, a mounting cavity is provided inside the grinding shaft, and a grinding mechanism and a detection rod that slide along the radial direction of the grinding shaft are provided in the mounting cavity;

[0007] The grinding mechanism and the detection rod are arranged opposite to each other, and one end of the grinding mechanism and the detection rod both slide through the grinding shaft;

[0008] The grinding mechanism has a low-position grinding state and a high-position grinding state; when the grinding shaft rotates, the grinding mechanism moves to the high-position grinding state under the action of centrifugal force to grind the inner wall of the bearing cavity; when the grinding shaft moves to the cavity position, the grinding mechanism and the detection rod are contacted by reducing the rotation speed of the grinding shaft within a preset time, and the grinding mechanism is restricted to the low-position grinding state by using the detection rod to grind the inner wall of the cavity.

[0009] As a further improvement of the technical solution, it also includes a locking mechanism, which is located between the grinding mechanism and the detection rod. When the rotation speed of the grinding shaft is reduced, the detection rod can be connected to the grinding mechanism, so that the detection rod can limit the grinding mechanism to a low-position grinding state through the locking mechanism.

[0010] As a further improvement of the technical solution, the end of the grinding shaft is coaxially fixedly connected with a drive motor. When the grinding shaft moves to the cavity, the rotation speed of the grinding shaft is reduced by reducing the driving force of the drive motor.

[0011] As a further improvement of the technical solution, the grinding mechanism includes a slide rod with one end located in the mounting cavity and the other end slidingly passing through the grinding shaft, a grinding block is provided on the top of the slide rod, and the slide rod is elastically connected to the grinding shaft;

[0012] The sliding rod is arranged along the radial direction of the grinding shaft.

[0013] As a further improvement of the present technical solution, the bottom end of the sliding rod protrudes outward to form a first baffle, and the distance from the first baffle to the inner wall of the mounting cavity is consistent with the distance from the grinding block to the inner wall of the bearing cavity, thereby preventing the grinding block from moving further toward the bearing cavity.

[0014] As a further improvement of the technical solution, a ball is rotatably provided at the bottom end of the detection rod; the outer wall of the detection rod is fixedly provided with a second baffle located outside the grinding shaft, and when the grinding block is in contact with the inner wall of the cavity, the second baffle is in contact with the outer wall of the grinding shaft to prevent the grinding block from moving further into the cavity.

[0015] As a further improvement of the technical solution, the weight of the detection rod is greater than the weight of the sliding rod. After the detection rod and the sliding rod are connected by a locking mechanism, the detection rod can pull the sliding rod to move.

[0016] As a further improvement of the technical solution, the locking mechanism includes a locking portion located at the bottom of the sliding rod and a locking portion located at the top of the detection rod. When the sliding rod and the detection rod are close to each other, the locking portion locks the locking portion to limit the sliding rod to a low-position grinding state through the detection rod.

[0017] The locking portion comprises a protrusion fixedly arranged at the bottom end of the slide rod, and a partial outer circle of the protrusion shrinks inwardly to form a slot for the locking portion to enter;

[0018] The locking portion includes a wedge-shaped latch and side plates located on both sides of the top end of the detection rod; the wedge-shaped latch slides transversely through the side plates, and a return spring is provided between one end of the wedge-shaped latch and the side wall of the side plate to elastically connect the two; the end of the wedge-shaped latch close to the protrusion is provided with an upward inclined surface, and the other end is provided with a longitudinally penetrating through groove;

[0019] The locking portion also includes a wedge rod located below the through slot, the wedge rod is fixed to the inner wall of the installation cavity, the inclined surface of the wedge rod is arranged at the top of the wedge rod, and is in an inclined state with one end close to the detection rod being high and the other end being low.

[0020] As a further improvement of the technical solution, the grinding shaft includes a transmission shaft fixedly connected to the output shaft of the driving motor, and a driven shaft rotatably connected to the transmission shaft at one end, and the mounting cavity is arranged in the driven shaft;

[0021] A cam is provided at one end of the driven shaft, and a shaft cavity rotatably connected to the cam is provided at one end of the transmission shaft;

[0022] The convex shaft is provided with a sliding cavity in communication with a mounting cavity at one end;

[0023] It also includes a clutch assembly, which is used to reduce the rotation speed of the driven shaft when the detection rod enters the cavity.

[0024] As a further improvement of the technical solution, the clutch assembly includes a fixed column fixedly arranged at one end of the sliding cavity, the outer ring of the fixed column is connected to a plurality of mounting springs, one end of the mounting spring is connected to a movable rod, one end of the movable rod slides through the convex shaft, and the end of the movable rod located in the sliding cavity is in a wide conical state close to the mounting spring; the end of the transmission shaft is fixedly connected to a push plate, and the movable rod is located on the rotation path of the push plate;

[0025] The clutch assembly also includes a piston cylinder that is laterally slidably arranged in the sliding cavity, the outer ring of the piston cylinder is slidably fitted with the inner wall of the sliding cavity, one end of the piston cylinder extends to the conical state of the movable rod, and the end of the piston cylinder facing the fixed column is in an open state, and a supporting spring that elastically connects the piston cylinder and the fixed column is arranged between the piston cylinder and the fixed column; under normal conditions, the end of the piston cylinder is flush with the side wall of the installation cavity, and a protruding protrusion is arranged at one end of the piston cylinder close to the installation cavity; a push rod is fixedly arranged on the side wall of the detection rod, and one end of the push rod extends to the side wall of the piston cylinder;

[0026] The end of the convex shaft is provided with two exhaust cavities with different diameters, wherein a one-way valve for exhausting gas in the sliding cavity is provided in the exhaust cavity with a larger diameter, and the outer ring of the transmission shaft is provided with an exhaust port connected with the shaft cavity.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the bicycle hub accessories production device, a slidable slide rod and a detection rod are arranged at the end of the grinding shaft, and the position of the grinding mechanism is adjusted by using the centrifugal force of the rotation of the grinding shaft, so that the grinding block at the end of the slide rod can adapt to the inner walls of different diameters, thereby realizing a one-time grinding of the inside of the hub, and reducing the number of grinding times for a single hub.

[0029] 2. In the bicycle hub accessories production device, the grinding mechanism and the detection rod are controlled by a locking mechanism. The locking mechanism limits the grinding block to the inner walls of the cavity and the bearing cavity, so that the grinding block does not move further to the outside, thereby avoiding excessive friction between the grinding mechanism and the inner walls of the bearing cavity and the cavity due to the action of centrifugal force, thereby improving the uniformity of the bearing cavity and the cavity after grinding.

[0030] 3. In the bicycle hub accessories production device, after the clutch assembly is set, the transmission shaft speed can be adjusted according to the different positions of the detection rod inside the hub, so that the sliding rod is subjected to different centrifugal forces at different positions. The change of centrifugal force is utilized to realize the connection between the sliding rod and the detection rod, so as to realize the rapid limit of the sliding rod and avoid the phenomenon that the grinding block wears the inside of the hub thin. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the cross-sectional structure of the hub of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 3 The cross-sectional structure of the grinding shaft of the present invention is shown in FIG. Figure 1 ;

[0034] Figure 4 The cross-sectional structure of the grinding shaft of the present invention is shown in FIG. Figure 2 ;

[0035] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at A;

[0036] Figure 6 It is a schematic diagram of the states of the sliding rod and the detection rod of the present invention;

[0037] Figure 7 The structure of the driven shaft and the transmission shaft of the present invention is schematically shown in FIG. Figure 1 ;

[0038] Figure 8 The structure of the driven shaft and the transmission shaft of the present invention is schematically shown in FIG. Figure 2 ;

[0039] Fig. 9 It is a schematic structural diagram of the top rod of the present invention.

[0040] The meaning of each number in the figure is:

[0041] 100, grinding shaft; 101, installation cavity; 102, driven shaft; 103, transmission shaft; 104, convex shaft; 105, shaft cavity; 106, push plate; 110, grinding mechanism; 111, slide bar; 112, connecting spring; 113, grinding block; 114, first baffle; 120, detection rod; 121, second baffle; 122, ball bearing; 130, locking mechanism; 131, convex block; 132, slot; 133, side plate; 134, wedge-shaped pin; 135, through slot; 136, wedge rod; 137, compound Position spring; 140, sliding chamber; 141, fixing column; 142, movable rod; 143, mounting spring; 150, piston cylinder; 151, supporting spring; 152, protrusion; 153, push rod; 154, exhaust chamber; 155, one-way valve; 156, exhaust port; 200, hub; 201, bearing chamber; 202, cavity; 300, supporting plate; 301, push rod; 302, first cylinder; 303, second cylinder; 304, third cylinder; 305, pressure rod; 306, bracket; 307, driving motor. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Figure 1 In the second structure of the hub 200, the bearing cavities 201 are arranged at both ends of the hub 200, the part of the hub 200 between the two bearing cavities 201 is the cavity 202, the inner diameter of the bearing cavity 201 is larger than the inner diameter of the cavity 202, and the bearing is installed in the bearing cavity 201 to prevent the bearing from moving toward the cavity 202. However, this structure with different inner diameters of each part makes it impossible for the traditional grinding roller to match the inner diameters of the bearing cavity 201 and the cavity 202 at the same time, so the grinding rollers corresponding to the bearing cavity 201 and the cavity 202 need to be replaced during the grinding process.

[0046] The present invention provides a bicycle hub accessory production device, such as Figure 3 As shown, it includes a grinding shaft 100 whose outer diameter is smaller than the inner diameter of the hub 200, so as to extend into the bearing cavity 201 and the cavity 202; the interior of the grinding shaft 100 is provided with an installation cavity 101, and the installation cavity 101 is provided with a grinding mechanism 110 and a detection rod 120 that slide along the radial direction of the grinding shaft 100, the grinding mechanism 110 and the detection rod 120 are arranged opposite to each other, and one end of the grinding mechanism 110 and the detection rod 120 slides through the grinding shaft 100. The grinding mechanism 110 has a low-position grinding state and a high-position grinding state. When the grinding shaft 100 rotates, the grinding mechanism 110 moves to the high-position grinding state under the action of centrifugal force to grind the inner wall of the bearing cavity 201. When the grinding shaft 100 moves to the cavity 202, the grinding mechanism 110 and the detection rod 120 are brought into contact by reducing the rotation speed of the grinding shaft 100 within a preset time, and the grinding mechanism 110 is restricted to a low-position grinding state by the detection rod 120 to grind the inner wall of the cavity 202.

[0047] Herein, the bicycle hub accessories production device also includes a locking mechanism 130, which is located between the grinding mechanism 110 and the detection rod 120. When the rotation speed of the grinding shaft 100 is reduced, the detection rod 120 can be connected to the grinding mechanism 110, so that the detection rod 120 can limit the grinding mechanism 110 to a low-position grinding state through the locking mechanism 130.

[0048] It should be noted that reducing the rotation speed of the grinding shaft 100 can be achieved by driving the motor 307. The driving motor 307 adopts a servo motor. The servo motor can realize closed-loop control of position, speed and torque, overcome the problem of stepping out of step of the stepping motor, and can achieve high-precision positioning with an accuracy of up to 0.001mm.

[0049] The preset time refers to the time it takes for the grinding mechanism 110 and the detection rod 120 to be connected during the process of reducing the speed of the grinding shaft 100. That is, when the speed of the grinding shaft 100 is reduced, the centrifugal force to which the grinding mechanism 110 and the detection rod 120 are subjected is reduced, so that they move toward the inside of the grinding shaft 100, approach each other, and are connected by the locking mechanism 130. At this time, the grinding mechanism 110 is restricted to a low-position grinding state, and the time consumed to complete the above steps is the preset time. After the preset time, the speed of the grinding shaft 100 can be further increased.

[0050] like Figure 2 As shown, in some embodiments, the end of the grinding shaft 100 is coaxially fixedly connected with a drive motor 307. When the grinding shaft 100 moves to the cavity 202, the rotation speed of the grinding shaft 100 is reduced by reducing the driving force of the drive motor 307.

[0051] As an example, by connecting the drive motor 307 to the bracket 306, the bottom end of the bracket 306 is slidably connected to the bottom plate. At the same time, a cylinder (not shown in the figure) is set on the side wall of the bracket 306, and the cylinder pushes the bracket 306 to move, so that the bracket 306 drives the drive motor 307 and the grinding shaft 100 to move toward the inside of the hub 200.

[0052] It should be understood that the operation of the cylinder and the drive motor 307 needs to be controlled by an encoder or other control chip, that is, when the cylinder drives the grinding shaft 100 to be in the cavity 202, the encoder or other control chip controls the speed of the drive motor 307 to decrease within a preset time.

[0053] It should be noted that Figure 2 and Fig. 9 There are also two support plates 300 for supporting the hub 200. The support plates 300 limit the hub 200 through the grooves on the top. A push rod 301 located above the hub 200 and a pressure rod 305 located below the hub 200 are arranged between the two support plates 300. The pressure rod 305 moves up and down through the third cylinder 304 arranged at the top, which is used to clamp the hub 200 during the grinding process; the push rod 301 moves up and down through the first cylinder 302 at the bottom, which is used to lift or lower the hub 200. In addition, a second cylinder 303 is also arranged on one side of the first cylinder 302. The second cylinder 303 drives the first cylinder 302 to move left and right, so that the loading and unloading operations of the hub 200 can be realized.

[0054] The specific loading operation is: put the hub 200 into the groove at the top of the push rod 301, then drive the first cylinder 302 and the push rod 301 to between the two support plates 300 through the second cylinder 303, and then control the first cylinder 302 to descend, so that the push rod 301 drives the hub 200 to fall into the groove at the top of the support plate 300.

[0055] The specific unloading operation is as follows: after the hub 200 is polished, the first cylinder 302 is used to control the push rod 301 to push upward, so that the push rod 301 pushes the hub 200 out of the groove at the top of the support plate 300, and then the second cylinder 303 is used to drive the first cylinder 302 and the push rod 301 to move. At this time, the push rod 301 drives the hub 200 to separate from the support plate 300.

[0056] like Figure 4 As shown, the grinding mechanism 110 includes a slide bar 111 with one end located in the mounting cavity 101 and the other end slidingly passing through the grinding shaft 100, a grinding block 113 is provided at the top of the slide bar 111, and the slide bar 111 is elastically connected to the grinding shaft 100. As an example, a connecting spring 112 is provided between the top of the slide bar 111 and the outer ring of the grinding shaft 100 to elastically connect the two. When the grinding shaft 100 is in a rotating state, the centrifugal force generated by the rotation of the grinding shaft 100 overcomes the elasticity of the connecting spring 112, and the slide bar 111 is swung outward, so that the slide bar 111 drives the grinding block 113 to move to the inner wall of the bearing cavity 201, and the inner wall of the bearing cavity 201 is ground by the grinding block 113.

[0057] The sliding rod 111 is arranged along the radial direction of the grinding shaft 100 .

[0058] The high-position grinding state of the grinding mechanism 110 refers to the state in which the slide bar 111 is swung outward under the centrifugal action, so that the grinding block 113 contacts the inner wall of the bearing cavity 201. In this state, the grinding block 113 grinds the outer wall of the bearing cavity 201 through the rotation of the grinding mechanism 110.

[0059] In order to prevent the grinding block 113 from excessively rubbing against the inner wall of the bearing cavity 201 due to the centrifugal force, the excessive friction may cause the grinding block 113 to damage the inner wall of the cavity 202, thus thinning the thickness of the hub 200. To this end, in some embodiments, the bottom end of the slide bar 111 protrudes outward to form a first baffle 114, and the distance from the first baffle 114 to the inner wall of the installation cavity 101 is consistent with the distance from the grinding block 113 to the inner wall of the bearing cavity 201 (refer to Figure 6 ), that is, when the slide rod 111 is swung outward to force the first baffle 114 to abut against the inner wall of the mounting cavity 101, the grinding block 113 contacts the side wall of the cavity 202, and the grinding block 113 does not move further outward, thereby avoiding damage to the inner wall of the bearing cavity 201.

[0060] Regarding avoiding damage to the inner wall of the cavity 202: a ball 122 is rotatably provided at the bottom end of the detection rod 120, and the ball 122 can reduce the friction between the detection rod 120 and the inner wall of the hub 200, thereby reducing the impact on the inner wall of the hub 200. In addition, a second baffle 121 located outside the grinding shaft 100 is fixedly provided on the outer wall of the detection rod 120, and the distance from the second baffle 121 to the outer wall of the grinding shaft 100 is consistent with the distance from the ball 122 from the bearing cavity 201 to the cavity 202 (refer to Figure 4 ). That is, when the detection rod 120 moves from the bearing cavity 201 to the cavity 202, the ball 122 will move upward through the transition surface between the bearing cavity 201 and the cavity 202. At this time, the ball 122 drives the detection rod 120 and the second baffle 121 to move upward, and the second baffle 121 moves up to the outer wall of the grinding shaft 100 to prevent the detection rod 120 from moving further upward. In other words, after the slide bar 111 and the detection rod 120 are connected by the locking mechanism 130, the detection rod 120 restricts the slide bar 111 through the second baffle 121 to prevent the slide bar 111 from moving outward, thereby avoiding damage to the inner wall of the bearing cavity 201.

[0061] Furthermore, the weight of the detection rod 120 is greater than the weight of the slide bar 111, that is, the centrifugal force on the detection rod 120 is greater than the centrifugal force on the slide bar 111, so that after the detection rod 120 and the slide bar 111 are connected through the locking mechanism 130, the detection rod 120 can pull the slide bar 111 to move.

[0062] Figure 5 The specific structure of the locking mechanism 130 is shown. As shown in the figure, the locking mechanism 130 includes a locking portion located at the bottom of the slide bar 111 and a locking portion located at the top of the detection rod 120. When the slide bar 111 and the detection rod 120 are close to each other, the locking portion locks the locking portion to limit the slide bar 111 to a low-position grinding state through the detection rod 120.

[0063] In some embodiments, the locking portion includes a protrusion 131 fixedly disposed at the bottom end of the slide rod 111, and a partial outer circle of the protrusion 131 shrinks inward to form a slot 132 for the locking portion to enter.

[0064] In some embodiments, the locking portion includes a wedge-shaped latch 134 and side plates 133 located on both sides of the top of the detection rod 120. Figure 5The state of the middle wedge-shaped pin 134 is based on the state of the wedge-shaped pin 134, which slides horizontally through the side plate 133, and a return spring 137 is provided between one end of the wedge-shaped pin 134 and the side wall of the side plate 133 to elastically connect the two. The end of the wedge-shaped pin 134 close to the protrusion 131 is provided with an upward inclined surface, and the other end is provided with a longitudinally penetrating through groove 135. In addition, the locking part also includes a wedge-shaped rod 136 located below the through groove 135, and the wedge-shaped rod 136 is fixed to the inner wall of the installation cavity 101. The inclined surface of the wedge-shaped rod 136 is set at the top of the wedge-shaped rod 136, and it is in an inclined state with one end high near the detection rod 120 and the other end low.

[0065] When the bicycle hub accessory production device of the present invention is used, the grinding shaft 100 is driven to rotate by the driving motor 307. The rotation of the grinding shaft 100 will swing the slide bar 111 and the detection rod 120 outwards through centrifugal force. At this time, the state of the slide bar 111 and the detection rod 120 is as follows: Figure 6 As shown, the grinding block 113 is attached to the inner wall of the bearing cavity 201 , and the second baffle 121 is against the inner wall of the bearing cavity 201 , and the grinding block 113 grinds the inner wall of the bearing cavity 201 at the same time.

[0066] When the grinding shaft 100 moves toward the cavity 202, due to the change in the height of the bearing cavity 201 and the cavity 202, the detection rod 120 will move upward through the transition surface between the bearing cavity 201 and the bearing cavity 201, and the end of the detection rod 120 will move toward the inside of the installation cavity 101. At the same time, the rotation speed of the grinding shaft 100 is controlled to decrease, so that the centrifugal force on the slide bar 111 is less than the elastic force of the connecting spring 112. At this time, the connecting spring 112 rebounds and drives the slide bar 111 to reset, that is, drives the slide bar 111 to move toward the inside of the installation cavity 101. At this time, the slide bar 111 and the detection rod 120 are close to each other, and the projection 131 pushes the wedge-shaped pin 134 through the inclined surface at the end of the wedge-shaped pin 134. When the slot 132 is in front of the wedge-shaped pin 134, the wedge-shaped pin 134 moves into the slot 132 through the elasticity of the reset spring 137, locking the projection 131. At this time, the grinding shaft 100 is controlled to return to the previous rotation speed. Since the slide bar 111 and the detection rod 120 are connected by the wedge-shaped pin 134 and the protrusion 131, the slide bar 111 will drive the detection rod 120 when it is swung outward, but the detection rod 120 is restricted by the second baffle 121, so the slide bar 111 cannot continue to move outward, so that the inner wall of the cavity 202 will not be damaged, and only the inner wall of the cavity 202 will be ground.

[0067] When the grinding shaft 100 moves to the bearing cavity 201 at the other end, the detection rod 120 can continue to move outward due to the larger inner diameter of the bearing cavity 201. In addition, since the weight of the detection rod 120 is greater than the weight of the slide bar 111, the detection rod 120 drives the slide bar 111 to move toward the wedge rod 136 through the wedge pin 134 and the protrusion 131. At this time, the wedge pin 134 moves through the inclined surface of the wedge rod 136 and disengages from the slot 132, causing the protrusion 131 to disengage from the wedge pin 134. At this time, the slide bar 111 moves outward to the high-position grinding state under the action of centrifugal force, thereby grinding the inner wall of the bearing cavity 201 at the other end.

[0068] It can be seen that by arranging a slidable slide rod 111 and a detection rod 120 at the end of the grinding shaft 100, the centrifugal force of the rotation of the grinding shaft 100 is used to adjust the position of the grinding mechanism 110, so that the grinding block 113 at the end of the slide rod 111 can adapt to inner walls of different diameters, thereby realizing a one-time grinding of the inside of the hub 200, thereby reducing the number of grinding times for a single hub 200.

[0069] In addition, the grinding mechanism 110 and the detection rod 120 are controlled by a locking mechanism 130, and the grinding block 113 is restricted to the inner walls of the cavity 202 and the bearing cavity 201 by the locking mechanism 130, so that the grinding block 113 will not move further to the outside, thereby avoiding excessive friction between the grinding mechanism 110 and the inner walls of the bearing cavity 201 and the cavity 202 due to the action of centrifugal force, thereby improving the uniformity of the bearing cavity 201 and the cavity 202 after grinding.

[0070] In some embodiments, the speed reduction of the grinding shaft 100 can also be achieved by a clutch assembly. Figure 7 and Figure 8 As shown, the grinding shaft 100 includes a transmission shaft 103 fixedly connected to the output shaft of the driving motor 307, and a driven shaft 102 with one end rotatably connected to the transmission shaft 103, and a mounting cavity 101 is arranged in the driven shaft 102. Specifically, a convex shaft 104 is arranged at one end of the driven shaft 102, and a shaft cavity 105 rotatably connected to the convex shaft 104 is arranged at one end of the transmission shaft 103. A sliding cavity 140 communicating with the mounting cavity 101 at one end is arranged inside the convex shaft 104.

[0071] The clutch assembly includes a fixed column 141 fixedly arranged at one end of the sliding cavity 140, a plurality of mounting springs 143 are connected to the outer ring of the fixed column 141, and the plurality of mounting springs 143 are arranged in a ring array, and a movable rod 142 is connected to one end of the mounting spring 143, and one end of the movable rod 142 penetrates the convex shaft 104 in a sliding manner, and the end of the movable rod 142 located in the sliding cavity 140 is in a wide conical state close to the mounting spring 143. The end of the transmission shaft 103 is fixedly connected to the push plate 106, and the movable rod 142 is located on the rotation path of the push plate 106.

[0072] The clutch assembly also includes a piston cylinder 150 that is laterally slidably disposed in the sliding cavity 140. The outer ring of the piston cylinder 150 is slidably fitted with the inner wall of the sliding cavity 140. One end of the piston cylinder 150 extends to the conical state of the movable rod 142, and the end of the piston cylinder 150 facing the fixed column 141 is in an open state. A support spring 151 that elastically connects the piston cylinder 150 and the fixed column 141 is disposed between the piston cylinder 150 and the fixed column 141. Under normal conditions, the end of the piston cylinder 150 is flush with the side wall of the installation cavity 101, and a protruding protrusion 152 is disposed at one end of the piston cylinder 150 close to the installation cavity 101. Both the upper and lower ends of the protrusion 152 are arc-shaped structures. A push rod 153 is fixedly disposed on the side wall of the detection rod 120, and one end of the push rod 153 extends to the side wall of the piston cylinder 150.

[0073] Two exhaust cavities 154 with different diameters are provided at the end of the convex shaft 104, wherein a one-way valve 155 for exhausting the gas in the sliding cavity 140 is provided in the exhaust cavity 154 with a larger diameter, and an exhaust port 156 connected to the shaft cavity 105 is provided on the outer ring of the transmission shaft 103.

[0074] Working principle:

[0075] Under normal conditions, the movable rod 142 moves toward the outside of the cam 104 through the elasticity of the mounting spring 143, so that the end of the movable rod 142 contacts the push plate 106. At this time, the output shaft of the driving motor 307 drives the transmission shaft 103 to rotate, and the transmission shaft 103 drives the driven shaft 102 to rotate through the push plate 106 and the movable rod 142.

[0076] When the detection rod 120 moves toward the cavity 202, the detection rod 120 will move toward the inside of the installation cavity 101, and drive the push rod 153 upward during the movement. During the upward movement, the push rod 153 pushes the piston cylinder 150 through the protrusion 152, so that the piston cylinder 150 moves toward the movable rod 142, and pushes the movable rod 142 downward through the conical surface at the end of the movable rod 142. At this time, the movable rod 142 is separated from the push plate 106, causing the driven shaft 102 to lose power and the speed of the driven shaft 102 begins to slow down. When the speed of the driven shaft 102 slows down, the centrifugal force on the slide bar 111 and the detection rod 120 is reduced, and the slide bar 111 and the detection rod 120 are close to each other. At this time, the slide bar 111 and the detection rod 120 are connected through the locking mechanism 130.

[0077] When the push rod 153 passes through the protrusion 152, the push rod 153 stops pushing the piston cylinder 150. At this time, the piston cylinder 150 is reset by the support spring 151. However, when the piston cylinder 150 moves toward the movable rod 142, the gas in the sliding chamber 140 will be discharged through the two exhaust chambers 154. When the piston cylinder 150 is reset, the exhaust chamber 154 with a larger diameter is provided with a one-way valve 155, so that the external gas can only enter through the exhaust chamber 154 with a smaller diameter, thereby forcing the reset speed of the piston cylinder 150 to slow down. Therefore, the reset speed of the piston cylinder 150 can also give the sliding rod 111 time to connect with the detection rod 120.

[0078] After the piston cylinder 150 is reset, the mounting spring 143 pushes the movable rod 142 toward the outside of the convex shaft 104 through its own elasticity, so that the movable rod 142 reappears in the movement path of the push plate 106. At this time, the rotating transmission shaft 103 can continue to drive the driven shaft 102 to rotate through the push plate 106 and the movable rod 142.

[0079] In summary, after the clutch assembly is set, the rotational speed of the transmission shaft 103 can be adjusted according to the different positions of the detection rod 120 inside the hub 200, so that the slide bar 111 is subjected to different centrifugal forces at different positions. The change of centrifugal force is utilized to realize the connection between the slide bar 111 and the detection rod 120, so as to realize the rapid limiting of the slide bar 111 and prevent the grinding block 113 from grinding the inside of the hub 200 thin.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bicycle hub accessory production device, comprising a grinding shaft (100) having an outer diameter smaller than an inner diameter of a hub (200), characterized in that: The grinding shaft (100) is provided with a mounting cavity (101) inside, and a grinding mechanism (110) and a detection rod (120) which slide along the radial direction of the grinding shaft (100) are arranged in the mounting cavity (101); The grinding mechanism (110) and the detection rod (120) are arranged opposite to each other, and one end of the grinding mechanism (110) and the detection rod (120) both slide through the grinding shaft (100); The grinding mechanism (110) has a low-position grinding state and a high-position grinding state; when the grinding shaft (100) rotates, the grinding mechanism (110) moves to the high-position grinding state under the action of centrifugal force to grind the inner wall of the bearing cavity (201); when the grinding shaft (100) moves to the cavity (202), the grinding mechanism (110) and the detection rod (120) are brought into contact by reducing the rotation speed of the grinding shaft (100) within a preset time, and the grinding mechanism (110) is restricted to the low-position grinding state by using the detection rod (120) to grind the inner wall of the cavity (202).

2. The bicycle hub accessory production device according to claim 1, characterized in that: The invention also comprises a locking mechanism (130), wherein the locking mechanism (130) is located between the grinding mechanism (110) and the detection rod (120), and when the rotation speed of the grinding shaft (100) is reduced, the detection rod (120) can be connected to the grinding mechanism (110), so that the detection rod (120) can restrict the grinding mechanism (110) to a low-position grinding state through the locking mechanism (130).

3. The bicycle hub accessory production device according to claim 1, characterized in that: The end of the grinding shaft (100) is coaxially fixedly connected to a driving motor (307). When the grinding shaft (100) moves to the cavity (202), the rotation speed of the grinding shaft (100) is reduced by reducing the driving force of the driving motor (307).

4. The bicycle hub accessory production device according to claim 2, characterized in that: The grinding mechanism (110) comprises a slide rod (111) with one end located in the mounting cavity (101) and the other end slidingly passing through the grinding shaft (100); a grinding block (113) is arranged on the top of the slide rod (111), and the slide rod (111) is elastically connected to the grinding shaft (100); The sliding rod (111) is arranged along the radial direction of the grinding shaft (100).

5. The bicycle hub parts production device according to claim 4, characterized in that: The bottom end of the slide rod (111) protrudes outward to form a first baffle (114); the distance from the first baffle (114) to the inner wall of the installation cavity (101) is consistent with the distance from the grinding block (113) to the inner wall of the bearing cavity (201), thereby preventing the grinding block (113) from moving further toward the bearing cavity (201).

6. The bicycle hub accessory production device according to claim 4, characterized in that: A ball bearing (122) is rotatably arranged at the bottom end of the detection rod (120); a second baffle (121) located outside the grinding shaft (100) is fixedly arranged on the outer wall of the detection rod (120); when the grinding block (113) is in contact with the inner wall of the cavity (202), the second baffle (121) is in contact with the outer wall of the grinding shaft (100) to prevent the grinding block (113) from moving further toward the cavity (202).

7. The bicycle hub accessory production device according to claim 4, characterized in that: The weight of the detection rod (120) is greater than the weight of the sliding rod (111). After the detection rod (120) and the sliding rod (111) are connected via the locking mechanism (130), the detection rod (120) can pull the sliding rod (111) to move.

8. The bicycle hub accessory production device according to claim 4, characterized in that: The locking mechanism (130) comprises a locking portion located at the bottom of the sliding rod (111) and a locking portion located at the top of the detection rod (120); when the sliding rod (111) and the detection rod (120) are close to each other, the locking portion locks the locking portion, so as to restrict the sliding rod (111) to a low-position grinding state through the detection rod (120); The locking portion comprises a protrusion (131) fixedly arranged at the bottom end of the slide bar (111), and a partial outer ring of the protrusion (131) is contracted inwardly to form a slot (132) for the locking portion to enter; The locking portion comprises a wedge-shaped latch (134) and side plates (133) located on both sides of the top end of the detection rod (120); the wedge-shaped latch (134) slides transversely through the side plate (133), and a return spring (137) is provided between one end of the wedge-shaped latch (134) and the side wall of the side plate (133) to elastically connect the two; an end of the wedge-shaped latch (134) close to the protrusion (131) is provided with an upward inclined surface, and the other end is provided with a longitudinally penetrating through groove (135); The locking portion further comprises a wedge-shaped rod (136) located below the through slot (135), wherein the wedge-shaped rod (136) is fixed to the inner wall of the mounting cavity (101), and an inclined surface of the wedge-shaped rod (136) is arranged at the top end of the wedge-shaped rod (136), and is in an inclined state with one end being higher and the other end being lower near the detection rod (120).

9. The bicycle hub accessory production device according to claim 1, characterized in that: The grinding shaft (100) comprises a transmission shaft (103) fixedly connected to the output shaft of the driving motor (307), and a driven shaft (102) one end of which is rotatably connected to the transmission shaft (103), and the mounting cavity (101) is arranged in the driven shaft (102); One end of the driven shaft (102) is provided with a convex shaft (104), and one end of the transmission shaft (103) is provided with a shaft cavity (105) rotatably connected to the convex shaft (104); The convex shaft (104) is provided with a sliding cavity (140) in communication with the mounting cavity (101) at one end; It also includes a clutch assembly, which is used to reduce the rotation speed of the driven shaft (102) when the detection rod (120) enters the cavity (202).

10. The bicycle hub accessory production device according to claim 9, characterized in that: The clutch assembly comprises a fixed column (141) fixedly arranged at one end of the sliding cavity (140), the outer ring of the fixed column (141) is connected to a plurality of mounting springs (143), one end of the mounting spring (143) is connected to a movable rod (142), one end of the movable rod (142) penetrates the convex shaft (104) in a sliding manner, and the end of the movable rod (142) located in the sliding cavity (140) is in a wide conical state close to the mounting spring (143); the end of the transmission shaft (103) is fixedly connected to a push plate (106), and the movable rod (142) is located on the rotation path of the push plate (106); The clutch assembly also includes a piston cylinder (150) which is laterally slidably arranged in the sliding cavity (140), the outer ring of the piston cylinder (150) is slidably fitted with the inner wall of the sliding cavity (140), one end of the piston cylinder (150) extends to the conical state of the movable rod (142), and the end of the piston cylinder (150) facing the fixed column (141) is in an open state, and a supporting spring (151) is arranged between the piston cylinder (150) and the fixed column (141) to elastically connect the two; under normal conditions, the end of the piston cylinder (150) is flush with the side wall of the installation cavity (101), and a protruding protrusion (152) is arranged at one end of the piston cylinder (150) close to the installation cavity (101); a push rod (153) is fixedly arranged on the side wall of the detection rod (120), and one end of the push rod (153) extends to the side wall of the piston cylinder (150); The end of the convex shaft (104) is provided with two exhaust cavities (154) of different diameters, wherein a one-way valve (155) for exhausting gas in the sliding cavity (140) is provided in the exhaust cavity (154) with a larger diameter, and an exhaust port (156) communicating with the shaft cavity (105) is provided on the outer ring of the transmission shaft (103).

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