A power-assisted bicycle hub bearing pressing equipment and its control method

Abstract

The present invention discloses an assisting bicycle hub bearing press-fitting device and its control method, which relates to the technical field of bearing press-fitting. It includes a support base, a protective shell is arranged at the bottom of the support base, a group of symmetrically arranged hydraulic rods are fixedly connected to the top of the support base, a support plate is fixedly connected to the top of the hydraulic rods, a hydraulic cylinder is fixedly connected to the bottom of the support plate, a press-fitting head is fixedly connected to the bottom of the hydraulic cylinder at the bottom of the support plate, and an oil-brushing assembly is arranged at the bottom of the press-fitting head. By setting a clamping assembly and a buffering assembly, when press-fitting a bearing on a hub, not only can the self-adaptive adjustment of the hub size be realized, and hubs with different diameters can be fixed, but also the resistance during the descent of the placement column can be gradually increased, so that there is a certain buffer when the placement column descends, protecting the safety of the bearing and the hub.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing press-fitting, and particularly to an assistive bicycle hub bearing press-fitting device and its control method. Background Art

[0002] The press-fitting of assistive bicycle hub bearings refers to the process of precisely installing bearings onto bicycle hubs, usually accomplished using special tools or appropriate methods to ensure that the bearings can be firmly and correctly fixed onto the hubs.

[0003] However, during the existing process of hub bearing press-fitting, a relatively large external force is required to insert the bearing into the hub. During this process, the bearing and the hub may be damaged under the action of the large external force. At the same time, when press-fitting bearings for hubs of different diameters, the operator needs to adjust the fixing device of the hub. Additionally, after the bearing is press-fitted, lubricating oil needs to be applied to the surface of the bearing to increase its lubricity during later use. Traditionally, lubricating oil is applied manually after the bearing press-fitting is completed, which is a rather cumbersome process and delays the efficiency of hub bearing press-fitting. In view of the above problems, there is an urgent need for innovative design on the original basis. Summary of the Invention

[0004] The purpose of the present invention is to provide an assistive bicycle hub bearing press-fitting device and its control method to solve the problems raised in the above background art, namely, the bearing and the hub are prone to damage under the action of a large external force; when press-fitting bearings for hubs of different diameters, the operator needs to adjust the hub fixing device, delaying the bearing press-fitting efficiency; and after the bearing is press-fitted, lubricating oil needs to be applied to the surface of the bearing, and traditionally, it is applied manually after the bearing press-fitting is completed. The technical solution of the present invention provides a solution that is significantly different from the prior art for the technical problem of the overly single solution of the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: A power-assisted bicycle hub bearing press-fitting device, including a support base, a protective shell is arranged at the bottom of the support base, a group of symmetrically arranged hydraulic rods are fixedly connected to the top of the support base, the top of the hydraulic rods is fixedly connected to a support plate, a hydraulic cylinder is fixedly connected to the bottom of the support plate, the bottom of the hydraulic cylinder at the bottom of the support plate is fixedly connected to a press-fitting head, a brush oil assembly is arranged at the bottom of the press-fitting head, limit plates are symmetrically arranged on the top of the support base, the limit plates are located between the two hydraulic rods, a positioning assembly is slidably connected to both of the two limit plates, a bearing is clamped between the two positioning assemblies, the brush oil assembly is located directly above the bearing, a placement column is slidably connected to the top of the support base, the placement column is located directly below the bearing, a hub is placed on the placement column, a group of annularly arrayed clamping assemblies are meshed and connected to the bottom of the placement column, the clamping assemblies are used for clamping the hub, a buffer assembly is arranged in the protective shell, a single-chip microcomputer controller is arranged in the support base, and the hydraulic rods and the hydraulic cylinder are respectively electrically connected to the single-chip microcomputer controller.

[0006] Preferably, the brush oil assembly includes a press head, a first spring telescopic rod is fixedly connected to the press head, and the bottom of the press head is inserted into an oil brush sleeve.

[0007] Preferably, the top of the press head is fixedly connected to the bottom of the press-fitting head, a spiral groove is formed in the press head, a fixing plate is fixedly connected to the press head, first spring telescopic rods are fixedly connected to the bottoms of both ends of the fixing plate, convex blocks are symmetrically arranged on the inner wall of the oil brush sleeve, and the press head and the oil brush sleeve are threadedly connected through the spiral groove and the convex blocks. An auxiliary block is fixedly connected to the oil brush sleeve, the side surface of the auxiliary block is an inclined surface, a brush head is arranged at the bottom of the auxiliary block, and the bottom of the first spring telescopic rod is rotatably connected to the top of the auxiliary block.

[0008] Preferably, the positioning assembly includes a second spring telescopic rod, an oil storage chamber and an extrusion chamber are arranged in the second spring telescopic rod, the oil storage chamber and the extrusion chamber in the second spring telescopic rod are communicated through a one-way valve, a piston rod is arranged in the extrusion chamber of the second spring telescopic rod, a spring is arranged between the piston rod and the bottom of the extrusion chamber, one end of the second spring telescopic rod is fixedly connected to a positioning block, and a nozzle is arranged on one side of the positioning block.

[0009] Preferably, a support rod is fixedly connected to the bottom of the support plate, the support rod is located directly above the piston rod, a hose is arranged in the telescopic rod of the second spring telescopic rod, and the positioning block is communicated with the extrusion chamber through the hose.

[0010] Preferably, a placement groove is formed at the top of the placement column, the bottom of the placement column is of a hollow structure, a trigger column is fixedly connected to the top of the hollow structure in the placement column, and a set of annular teeth with uniform intervals are arranged on the trigger column.

[0011] Preferably, the clamping assembly includes a clamping gear, one end of a connecting rod is rotatably connected to the side of the clamping gear, the other end of the connecting rod is rotatably connected to the bottom of a slider, a clamping plate is fixedly connected to the top of the slider, and a placement plate is slidably connected to one side of the clamping plate.

[0012] Preferably, the clamping gear is rotatably connected in a support base, the placement column is meshed with the clamping gear through a set of annular teeth with uniform intervals, a slider is slidably connected in the support base, the clamping plate is slidably connected to the support base, and the placement plate is used for placing the wheel hub.

[0013] Preferably, the buffer assembly includes a set of buffer plates arranged up and down, inclined surfaces are arranged on the sides of the buffer plates, a set of annularly arrayed third spring telescopic rods are arranged on the inclined surfaces of the buffer plates, a buffer column is fixedly connected to the bottom of the buffer plates, the buffer column is made of buffer material, both buffer plates are slidably connected to a sliding column, the bottom of the sliding column is fixedly connected in a protective shell, the third spring telescopic rods are fixedly connected to the inner wall of the protective shell, and a trigger column is fixedly connected to the top of the upper buffer plate.

[0014] The present invention also provides another technical solution: a control method for a hydraulic press-fitting device for a hub bearing of an assisted bicycle, the control method comprising the following steps:

[0015] S1. An operator places the bearing between two positioning components and places the wheel hub on the placement column, so that one side of the wheel hub is inserted into the placement groove of the placement column;

[0016] S2. The operator controls the hydraulic rod to contract, so that the support plate gradually descends, and the positioning component is pushed to descend through the support rod;

[0017] S3. When the positioning component reaches the wheel hub, the hydraulic rod stops contracting. At this time, the hydraulic cylinder starts to gradually extend, and the bearing in the positioning component is extruded into the wheel hub through the press-fitting head. At the same time, the clamping component will fix the wheel hub;

[0018] S4. After the bearing enters the wheel hub, the hydraulic cylinder gradually contracts, and at the same time the hydraulic rod gradually extends, so that the support plate returns to the initial position, waiting for the operator's next operation of press-fitting the hub bearing.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the above solution, by setting the clamping assembly, during the process of press-fitting the hub bearing, the pressure of the hydraulic cylinder pressing the bearing can be utilized to fix hubs with different diameters, avoiding the need for operators to debug the fixing device during the press-fitting of hub bearings with different diameters, and improving the efficiency of hub bearing press-fitting.

[0021] By setting the placement column and the buffer assembly, during the process of press-fitting the hub bearing, it is possible to achieve a gradually increasing resistance when the placement column descends, providing a certain buffer when the placement column descends, ensuring accuracy when the bearing is press-fitted into the hub, and ensuring the safety of the equipment and parts during rigid installation, avoiding damage between the bearing and the hub under the action of a large external force.

[0022] By setting the oil-brushing assembly and the positioning assembly, during the process of press-fitting the bearing into the hub, it is possible to brush oil on the surface of the bearing, avoiding the need to apply lubricating oil after the press-fitting of the bearing in the traditional method. This not only avoids the participation of multiple operators, reduces labor costs, but also improves the efficiency of hub bearing press-fitting. Description of the Drawings

[0023] Figure 1 Schematic structural diagram of a hub bearing press-fitting device and its control method according to the present invention;

[0024] Figure 2 Schematic structural diagram of the support base according to the present invention;

[0025] Figure 3 Exploded schematic diagram of the oil-brushing assembly according to the present invention;

[0026] Figure 4 Schematic structural diagram of the positioning assembly according to the present invention;

[0027] Figure 5 Schematic diagram of a partial structure according to the present invention;

[0028] Figure 6 Schematic structural diagram of the placement column according to the present invention;

[0029] Figure 7 Schematic diagram of the connection structure between the clamping assembly and the placement column according to the present invention;

[0030] Figure 8 Schematic structural diagram of the clamping assembly according to the present invention;

[0031] Figure 9 Schematic diagram of the connection structure between the buffer assembly and the protective shell according to the present invention;

[0032] Figure 10 Schematic diagram of a partial structure of the buffer assembly according to the present invention;

[0033] Figure 11 Schematic diagram of the buffer plate structure of the present invention;

[0034] Figure 12 Schematic diagram of the system principle of the present invention.

[0035] In the figure: 1. Support base; 11. Protective shell; 12. Hydraulic rod; 13. Support plate; 131. Support rod; 14. Pressing head; 15. Limiting plate; 2. Oil brushing assembly; 21. Pressing head; 211. Fixed plate; 22. First spring telescopic rod; 23. Oil brushing sleeve; 231. Auxiliary block; 3. Positioning assembly; 31. Second spring telescopic rod; 32. Piston rod; 321. Check valve; 33. Positioning block; 331. Nozzle; 4. Placing column; 41. Trigger column; 5. Clamping assembly; 51. Clamping gear; 52. Connecting rod; 53. Slide block; 54. Clamping plate; 55. Placing plate; 6. Buffer assembly; 61. Buffer plate; 611. Buffer column; 62. Third spring telescopic rod; 63. Slide column. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0037] Please refer to Figures 1 to 12, the present invention provides a technical solution: a pressing device for a hub bearing of an assisted bicycle, including a support base 1. A protective shell 11 is arranged at the bottom of the support base 1. A set of symmetrically arranged hydraulic rods 12 are fixedly connected to the top of the support base 1. The top of the hydraulic rod 12 is fixedly connected to a support plate 13. A hydraulic cylinder is fixedly connected to the bottom of the support plate 13. A pressing head 14 is fixedly connected to the bottom of the hydraulic cylinder at the bottom of the support plate 13. A lubricating oil brushing component 2 is arranged at the bottom of the pressing head 14. Limiting plates 15 are symmetrically arranged on the top of the support base 1. The limiting plates 15 are located between the two hydraulic rods 12. A positioning component 3 is slidably connected to each of the two limiting plates 15. A bearing is clamped between the two positioning components 3. The lubricating oil brushing component 2 is located directly above the bearing. A placing column 4 is slidably connected to the top of the support base 1. The placing column 4 is located directly below the bearing. A hub is placed on the placing column 4. A set of annularly arrayed clamping components 5 are meshed and connected to the bottom of the placing column 4. The clamping components 5 are used to clamp the hub. A buffer component 6 is arranged in the protective shell 11. A single-chip microcomputer controller is arranged in the support base 1. The hydraulic rods 12 and the hydraulic cylinder are respectively electrically connected to the single-chip microcomputer controller. When an operator presses the hub bearing of the assisted bicycle, first, the bearing needs to be placed between the two positioning components 3 so that the two positioning components 3 can clamp the bearing. Then, the operator places the hub on the placing column 4 and inserts one side of the hub into the placing groove of the placing column 4. Then, the operator controls the hydraulic rods 12 to contract, causing the support plate 13 to gradually descend. During the descent of the support plate 13, the support rod 131 will abut against the top of the positioning component 3, causing the positioning component 3 to eject lubricating oil and then move downward. When the positioning component 3 moves above the hub, the hydraulic rods 12 stop contracting, and at the same time, the hydraulic cylinder starts to extend. When the hydraulic cylinder extends, the lubricating oil brushing component 2 will abut against the bearing. As the hydraulic cylinder gradually extends, the hub is subjected to pressure and gradually moves downward. During this process, the clamping components 5 will gradually contract and clamp the hub. At the same time, the pressure of the placing column 4 will be transmitted to the buffer component 6. When the hub is completely clamped by the clamping components 5, the extension of the hydraulic cylinder will press the bearing into the hub. When the bearing pressing is completed, the hydraulic cylinder will contract, and at the same time, the hydraulic rods 12 will extend, causing the support plate 13 to return to the initial height, facilitating the operator to perform the next pressing of the hub bearing. During the contraction of the hydraulic cylinder, the lubricating oil brushing component 2 will rotate on the bearing to evenly apply the lubricating oil on the bearing.

[0038] Please refer to Figures 1 to 4, the present invention provides a technical solution: a hub bearing pressing device for a power-assisted bicycle. The oil-brushing assembly 2 includes a pressing head 21, on which a first spring telescopic rod 22 is fixedly connected. The bottom of the pressing head 21 is inserted into an oil-brushing sleeve 23, and the top of the pressing head 21 is fixedly connected to the bottom of the pressing head 14. A spiral groove is provided on the pressing head 21, and a fixing plate 211 is fixedly connected to the pressing head 21. At both ends of the bottom of the fixing plate 211, first spring telescopic rods 22 are fixedly connected. On the inner wall of the oil-brushing sleeve 23, convex blocks are symmetrically arranged. The pressing head 21 and the oil-brushing sleeve 23 are threadedly connected through the spiral groove and the convex blocks. An auxiliary block 231 is fixedly connected to the oil-brushing sleeve 23. The side of the auxiliary block 231 is an inclined surface, and a brush head is provided at the bottom of the auxiliary block 231. The bottom of the first spring telescopic rod 22 is rotatably connected to the top of the auxiliary block 231. The positioning assembly 3 includes a second spring telescopic rod 31. An oil storage chamber and an extrusion chamber are provided in the second spring telescopic rod 31. The oil storage chamber and the extrusion chamber in the second spring telescopic rod 31 are communicated through a one-way valve 321. A piston rod 32 is provided in the extrusion chamber of the second spring telescopic rod 31. A spring is provided between the piston rod 32 and the bottom of the extrusion chamber. One end of the second spring telescopic rod 31 is fixedly connected to a positioning block 33. A nozzle 331 is provided on one side of the positioning block 33. A support rod 131 is fixedly connected to the bottom of the support plate 13. The support rod 131 is located directly above the piston rod 32. A hose is provided in the telescopic rod of the second spring telescopic rod 31. The positioning block 33 is connected to the extrusion chamber through the hose. When pressing the hub bearing, when the operator presses the bearing into the hub, the operator needs to apply lubricating oil to the bearing. In this process, not only the participation of multiple operators is required, increasing the labor cost, but also the efficiency of hub pressing will be delayed. This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. When the support plate 13 descends, the support rod 131 will press on the top of the piston rod 32. When the piston rod 32 is pressed, the piston rod 32 will move downward, squeezing the lubricating oil in the extrusion chamber into the positioning block 33 through the hose. Since the position of the bearing is below the nozzle 331, the lubricating oil flowing out of the nozzle 331 at this time will fall above the bearing. When the piston rod 32 stops moving under the resistance of the spring, the first spring telescopic rod 22 will move downward on the limit plate 15 under the action of the support rod 131. When the positioning block 33 touches the hub, the hydraulic rod 12 stops contracting, and at the same time, the hydraulic cylinder starts to gradually extend. When the hydraulic cylinder extends, the auxiliary block 231 will be inserted between the two positioning blocks 33, and under the action of the inclined surface, the two positioning blocks 33 will move in opposite directions. At the same time, the auxiliary block 231 will press the bearing against one side of the hub. As the hydraulic cylinder extends, the hub will squeeze the placement column 4, causing the placement columns 4 to descend. Since the bottom of the auxiliary block 231 contacts the bearing, the pressing head 21 will continue to move downward. At this time, the oil-brushing sleeve 23 will rotate on the pressing head 21, and at the same time, the auxiliary block 231 will rotate on the surface of the bearing.Apply the lubricating oil on the bearing surface. After the bearing is pressed into the hub by the pressing head 21, the hydraulic cylinder starts to gradually contract, and at the same time, the hydraulic rod 12 gradually extends. When the hydraulic cylinder contracts, the pressing head 21 starts to rise. During the rising process of the pressing head 21, the compressed first spring telescopic rod 22 will be released, and the auxiliary block 231 will be attached to one side of the bearing. At the same time, since the height of the auxiliary block 231 remains unchanged, the oil-brushing sleeve 23 will still rotate on the pressing head 21 at this time, and the auxiliary block 231 will rotate again on one side of the bearing to evenly apply the lubricating oil on the bearing. When the first spring telescopic rod 22 returns to its initial length, the oil-brushing sleeve 23 stops rotating. During the rising process of the support rod 131, the second spring telescopic rod 31 will move upward on the limit plate 15 under the action of the spring. When the support plate 13 returns to its initial height, the hydraulic rod 12 and the hydraulic cylinder stop operating, waiting for the operator to press-fit the next set of hubs.

[0039] Please refer to Figure 1 and Figures 5 to 8 , the present invention provides a technical solution: a pressing device for a hub bearing of a power-assisted bicycle. A placement groove is provided at the top of the placement column 4. The bottom of the placement column 4 is a hollow structure. A trigger column 41 is fixedly connected to the top of the hollow structure in the placement column 4. A set of evenly spaced annular teeth are provided on the trigger column 41. The clamping assembly 5 includes a clamping gear 51. One end of a connecting rod 52 is rotatably connected to the side of the clamping gear 51. The other end of the connecting rod 52 is rotatably connected to the bottom of the slider 53. A clamping plate 54 is fixedly connected to the top of the slider 53. A placement plate 55 is slidably connected to one side of the clamping plate 54. The clamping gear 51 is rotatably connected in the support base 1. The placement column 4 is meshed and connected to the clamping gear 51 through a set of evenly spaced annular teeth. The slider 53 is slidably connected in the support base 1. The clamping plate 54 is slidably connected to the support base 1. The placement plate 55 is used to place the hub. When the operator presses the bearing into the hub, the diameters of different specifications of hubs are different. When fixing the hub, the operator needs to debug the clamping device so that the hub can be fixed. This process is relatively cumbersome and takes a long time, reducing the processing efficiency. This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. When the hub presses the placement column 4 and causes the placement column 4 to descend, the clamping gear 51 meshed with the trigger column 41 starts to rotate. When the clamping gear 51 rotates, the clamping gear 51 will move the slider 53 on the support base 1 through the connecting rod 52. When the four sliders 53 move synchronously, they will gradually approach the periphery of the hub. When the four clamping plates 54 clamp on the hub at the same time, the hub will be fixed on the placement column 4 at this time. At this time, since the clamping plate 54 cannot move further, the clamping gear 51 stops rotating. The pressure generated by the hydraulic cylinder can be used to make the clamping plate 54 clamp the hub, avoiding the complex operation of the operator and improving the efficiency of hub bearing pressing.

[0040] Please refer to Figures 9 to 11 Figures 9 to 11

[0041] The present invention also provides another technical solution: a control method for an assisted bicycle hub bearing pressing device, which includes the following steps:

[0042] S1. The operator places the bearing between the two positioning components 3 and places the hub on the placing column 4 so that one side of the hub is inserted into the placing groove of the placing column 4;

[0043] S2. The operator controls the hydraulic rod 12 to contract, causing the support plate 13 to gradually descend and pushing the positioning component 3 to descend through the support rod 131;

[0044] S3. When the positioning component 3 reaches the wheel hub, the hydraulic rod 12 stops contracting. At this time, the hydraulic cylinder begins to gradually extend, and the bearing in the positioning component 3 is extruded into the wheel hub through the press-fitting head 14. Meanwhile, the clamping component 5 will fix the wheel hub.

[0045] S4. After the bearing enters the wheel hub, the hydraulic cylinder gradually contracts, and at the same time, the hydraulic rod 12 gradually extends, so that the support plate 13 returns to the initial position, waiting for the operator's next operation of press-fitting the wheel hub bearing.

[0046] The working principle provided by the technical solution of the present invention:

[0047] After the operator presses the bearing into the hub, the operator needs to apply lubricating oil to the bearing. In this process, not only the participation of multiple operators is required, increasing the labor cost, but also the efficiency of hub pressing will be delayed. This embodiment of the present invention can solve the above problems. The specific implementation is as follows. When the support plate 13 descends, the support rod 131 will squeeze on the top of the piston rod 32. When the piston rod 32 is squeezed, the piston rod 32 will move downward, squeezing the lubricating oil in the extrusion chamber into the positioning block 33 through the hose. Since the position of the bearing is below the nozzle 331, the lubricating oil flowing out of the nozzle 331 at this time will fall above the bearing. When the piston rod 32 stops moving due to the resistance of the spring, the first spring telescopic rod 22 will move downward on the limiting plate 15 under the action of the support rod 131. When the positioning block 33 touches the hub, the hydraulic rod 12 stops contracting, and at the same time, the hydraulic cylinder starts to gradually extend. When the hydraulic cylinder extends, the auxiliary block 231 will be inserted between the two positioning blocks 33, and under the action of the inclined surface, the two positioning blocks 33 will move in the opposite direction. At the same time, the auxiliary block 231 will press the bearing against one side of the hub. As the hydraulic cylinder extends, the hub will squeeze the placement column 4, causing the placement column 4 to descend. Since the bottom of the auxiliary block 231 contacts the bearing, the pressing head 21 will continue to move downward. At this time, the oil brushing sleeve 23 will rotate on the pressing head 21, and at the same time, the auxiliary block 231 will rotate on the surface of the bearing to apply the lubricating oil on the surface of the bearing. When the bearing is pressed into the hub by the pressing head 21, the hydraulic cylinder starts to gradually contract, and at the same time, the hydraulic rod 12 gradually extends. When the hydraulic cylinder contracts, the pressing head 21 starts to rise. During the rising process of the pressing head 21, the compressed first spring telescopic rod 22 will be released, pressing the auxiliary block 231 against one side of the bearing. At the same time, since the height of the auxiliary block 231 remains unchanged, the oil brushing sleeve 23 will still rotate on the pressing head 21, and the auxiliary block 231 will rotate on one side of the bearing again to evenly apply the lubricating oil on the bearing. When the first spring telescopic rod 22 returns to its initial length, the oil brushing sleeve 23 stops rotating. During the rising process of the support rod 131, the second spring telescopic rod 31 will move upward on the limiting plate 15 under the action of the spring. When the support plate 13 returns to its initial height, the hydraulic rod 12 and the hydraulic cylinder stop operating, waiting for the operator to press the next set of hubs. When the operator presses the bearing into the hub, the diameters of different specifications of hubs are different. When fixing the hub, the operator needs to debug the clamping device so that the hub can be fixed. This process is relatively cumbersome and takes a long time, reducing the processing efficiency. This embodiment of the present invention can solve the above problems. The specific implementation is as follows. When the hub squeezes the placement column 4 and causes the placement column 4 to descend, the clamping gear 51 engaged with the trigger column 41 starts to rotate. When the clamping gear 51 rotates, the clamping gear 51 will cause the slider 53 to move on the support base 1 through the connecting rod 52.When the four sliders 53 move synchronously, they will gradually approach the periphery of the hub. When the four clamping plates 54 are simultaneously clamped on the hub, the hub will be fixed on the placing column 4. At this time, since the clamping plate 54 cannot move further, the clamping gear 51 stops rotating. The pressure generated by the hydraulic cylinder can enable the clamping plate 54 to clamp the hub, avoiding complex operations by the operator and improving the efficiency of hub bearing press-fitting. When the operator performs bearing press-fitting, a relatively large external force is required to make the bearing enter the hub. During this process, it is easy to cause excessive pressure on the air compressor and damage the function of the air compressor. This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. When the placing column 4 moves downward, the trigger column 41 will push the upper buffer plate 61 downward. When the buffer plate 61 moves downward, one end of the third spring telescopic rod 62 will move on the inclined surface of the buffer plate 61. The inclined surface of the buffer plate 61 will squeeze the third spring telescopic rod 62, and the buffer plate 61 will be subject to resistance during the descending process. When the upper buffer plate 61 moves to the top of the lower buffer plate 61, the buffer column 611 of the upper buffer plate 61 will be blocked by the lower buffer plate 61. At this time, the resistance to the descent of the upper buffer plate 61 increases again. When the two buffer plates 61 move downward synchronously, both buffer plates 61 will be subject to the resistance of the third spring telescopic rod 62. At this time, the resistance to the descent of the placing column 4 increases again. By setting an increasing resistance, a certain buffer can be provided when the placing column 4 descends, ensuring accuracy when the bearing is press-fitted into the hub and ensuring the safety of the equipment and parts during rigid installation, and avoiding damage to the bearing and the hub under the action of a large external force.

[0048] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are 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", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" 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. 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 circumstances.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power-assisted bicycle wheel hub bearing press-fitting device, characterized in that: The invention comprises a support base (1), wherein a protective shell (11) is arranged at the bottom of the support base (1), a group of symmetrically arranged hydraulic rods (12) are fixedly connected to the top of the support base (1), a support plate (13) is fixedly connected to the top of the hydraulic rods (12), a hydraulic cylinder is fixedly connected to the bottom of the support plate (13), a press head (14) is fixedly connected to the bottom of the hydraulic cylinder at the bottom of the support plate (13), an oil brushing assembly (2) is arranged at the bottom of the press head (14), and a limit plate (15) is symmetrically arranged at the top of the support base (1), the limit plate (15) is located between two hydraulic rods (12), and the two limit plates (15) are A positioning assembly (3) is slidably connected to the top of each support base (1), a bearing is clamped between the two positioning assemblies (3), the oil brush assembly (2) is located directly above the bearing, a placement column (4) is slidably connected to the top of the support base (1), the placement column (4) is located directly below the bearing, a wheel hub is placed on the placement column (4), a group of clamping assemblies (5) in an annular array are meshedly connected to the bottom of the placement column (4), the clamping assembly (5) is used to clamp the wheel hub, a buffer assembly (6) is arranged in the protective shell (11), a single-chip microcomputer controller is arranged in the support base (1), and the hydraulic rod (12) and the hydraulic cylinder are respectively electrically connected to the single-chip microcomputer controller; The oil brushing assembly (2) comprises a pressure head (21), to which a first spring telescopic rod (22) is fixedly connected, the bottom of the pressure head (21) is inserted into an oil brushing sleeve (23), the top of the pressure head (21) is fixedly connected to the bottom of a press-fitting head (14), a spiral groove is provided on the pressure head (21), a fixing plate (211) is fixedly connected to the pressure head (21), the bottoms of both ends of the fixing plate (211) are fixedly connected to the first spring telescopic rod (22), the inner wall of the oil brushing sleeve (23) is symmetrically provided with protrusions, the pressure head (21) and the oil brushing sleeve (23) are threadedly connected to the protrusions via the spiral groove, the oil brushing sleeve (23) is fixedly connected to an auxiliary block (231), the side surface of the auxiliary block (231) is an inclined surface, a brush head is provided at the bottom of the auxiliary block (231), and the bottom of the first spring telescopic rod (22) is rotatably connected to the top of the auxiliary block (231).

2. The power-assisted bicycle wheel hub bearing press-fitting device according to claim 1, characterized in that: The positioning assembly (3) comprises a second spring telescopic rod (31), wherein an oil storage chamber and an extrusion chamber are provided in the second spring telescopic rod (31), the oil storage chamber and the extrusion chamber in the second spring telescopic rod (31) are connected via a one-way valve (321), a piston rod (32) is provided in the extrusion chamber of the second spring telescopic rod (31), a spring is provided between the piston rod (32) and the bottom of the extrusion chamber, one end of the second spring telescopic rod (31) is fixedly connected to a positioning block (33), and a nozzle (331) is provided on one side of the positioning block (33).

3. The power-assisted bicycle wheel hub bearing press-fitting device according to claim 2, characterized in that: A support rod (131) is fixedly connected to the bottom of the support plate (13), and the support rod (131) is located directly above the piston rod (32). A hose is provided in the telescopic rod of the second spring telescopic rod (31), and the positioning block (33) is connected to the extrusion chamber via the hose.

4. The power-assisted bicycle hub bearing press-fitting device according to claim 3, characterized in that: The top of the placement column (4) is provided with a placement groove, the bottom of the placement column (4) is a hollow structure, the top of the hollow structure in the placement column (4) is fixedly connected with a trigger column (41), and the trigger column (41) is provided with a group of evenly spaced annular teeth.

5. The power-assisted bicycle wheel hub bearing press-fitting device according to claim 4, characterized in that: The clamping assembly (5) comprises a clamping gear (51), the side of the clamping gear (51) is rotatably connected to one end of a connecting rod (52), the other end of the connecting rod (52) is rotatably connected to the bottom of a slider (53), the top of the slider (53) is fixedly connected to a clamping plate (54), and one side of the clamping plate (54) is slidably connected to a placement plate (55).

6. The power-assisted bicycle hub bearing press-fitting device according to claim 5, characterized in that: The clamping gear (51) is rotatably connected to the support base (1); the placement column (4) is meshed with the clamping gear (51) via a group of evenly spaced annular teeth; a slider (53) is slidably connected to the support base (1); the clamping plate (54) is slidably connected to the support base (1); and the placement plate (55) is used to place the wheel hub.

7. The power-assisted bicycle hub bearing press-fitting device according to claim 6, characterized in that: The buffer assembly (6) comprises a group of buffer plates (61) arranged in an upper and lower manner, the side surface of the buffer plate (61) is provided with an inclined surface, a group of third spring telescopic rods (62) in an annular array are provided on the inclined surface of the buffer plate (61), a buffer column (611) is fixedly connected to the bottom of the buffer plate (61), and the buffer column (611) is a buffer material, the two buffer plates (61) are slidably connected to the sliding column (63), the bottom of the sliding column (63) is fixedly connected to the protective shell (11), the third spring telescopic rod (62) is fixedly connected to the inner wall of the protective shell (11), and the top of the buffer plate (61) located at the top is fixedly connected to the trigger column (41).

8. A control method for a power-assisted bicycle hub bearing press-fitting device, applicable to a power-assisted bicycle hub bearing press-fitting device as claimed in any one of claims 1 to 7, characterized in that: The control method comprises the following steps: S1. The operator places the bearing between the two positioning components (3) and places the wheel hub on the placement column (4) so ​​that one side of the wheel hub is inserted into the placement groove of the placement column (4); S2, the operator controls the hydraulic rod (12) to retract, so that the support plate (13) gradually descends, and pushes the positioning assembly (3) to descend through the support rod (131); S3, when the positioning assembly (3) reaches the wheel hub, the hydraulic rod (12) stops contracting, and the hydraulic cylinder begins to gradually extend, squeezing the bearing in the positioning assembly (3) into the wheel hub through the pressing head (14), and at the same time the clamping assembly (5) fixes the wheel hub; S4. After the bearing enters the wheel hub, the hydraulic cylinder gradually contracts and the hydraulic rod (12) gradually extends, so that the support plate (13) returns to its initial position, waiting for the operator to press the wheel hub bearing for the next time.

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