Disassembling and assembling tool for ratchet wheel bearing of hub

Abstract

The utility model discloses a hub ratchet bearing dismounting tool which is characterized in that a first pressing seat is provided with a first through hole with internal threads, and one end face, penetrated by the first through hole, of the first pressing seat is provided with a first step coaxially surrounding the first through hole; the second pressing seat comprises a first column body and a second column body coaxially arranged around the first column body, a second through hole with an internal thread is formed in the first column body in the axial direction, and a second hole shoulder is arranged on the inner wall of the second column body; the screw rod can be in threaded connection with the first through hole and the second through hole; the pressing piece comprises a first shaft section and a second shaft section which are hollow and are coaxially arranged; according to the hub ratchet wheel bearing assembling and disassembling tool, the ratchet wheel and the bearing are assembled and disassembled through positioning matching of the first pressing base, the second pressing base and the pressing piece, the first pressing base and the pressing piece move very stably in the assembling and disassembling process and do not shake, and therefore the bearing can be coaxially and stably moved in or out relative to the ratchet wheel, and the assembling and disassembling efficiency is improved. The bearing and ratchet wheel assembling and disassembling precision is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dismounting tool instruments, particularly to a hub ratchet wheel bearing dismounting tool. BACKGROUND

[0002] The existing bicycle hub dismounting tool is too complex in structure and cannot guarantee that the bearing can be accurately installed into the ratchet wheel, so a hub ratchet wheel bearing dismounting tool is designed as in CN212706563U. However, it is found that the dismounting tool is prone to shaking during use, which causes the ratchet wheel and the bearing to be inclined in the axial direction. Therefore, further improvement is needed. SUMMARY

[0003] The utility model aims at at least one of the above technical problems in the related art to some extent. Therefore, the utility model provides a hub ratchet wheel bearing dismounting tool.

[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] The hub ratchet wheel bearing dismounting tool according to the first aspect embodiment of the utility model comprises:

[0006] The first pressing seat is provided with a first through hole with internal threads, and a first step coaxially surrounding the first through hole is arranged on the end face of the first pressing seat penetrated by the first through hole. The end part of the first through hole close to the first step is provided with a first shoulder.

[0007] The second pressing seat comprises a first column body and a second column body coaxially arranged around the first column body. The first column body is provided with a second through hole with internal threads along the axial direction. The inner wall of the second column body is provided with a second shoulder.

[0008] The screw rod can be threadedly connected with the first through hole and the second through hole.

[0009] The pressing piece comprises a first shaft segment and a second shaft segment which are hollow and coaxially arranged. The outer diameter of the first shaft segment is smaller than that of the second shaft segment. The outer diameter of the first column body is adapted to the inner diameter of the pressing piece. The end part outer diameter of the first shaft segment is adapted to the end part inner diameter of the first through hole close to the first shoulder. A sunken cavity is arranged on the end face of the second shaft segment away from the first shaft segment. A first groove in the shape of a circular ring and coaxially arranged with the second shaft segment is arranged on the plane of the sunken cavity. The inner diameter of the sunken cavity is adapted to the outer diameter of the first step.

[0010] The flower drum ratchet wheel bearing dismounting tool has the following beneficial effects: the first pressing seat, the second pressing seat and the pressing piece are positioned and matched, the ratchet wheel and the bearing are disassembled and assembled, the first pressing seat and the pressing piece are stable during the disassembly and assembly process and cannot shake, the bearing can be coaxially and stably moved into or out of the ratchet wheel, and the disassembly and assembly precision of the bearing and the ratchet wheel is ensured.

[0011] According to some embodiments of the present application, the end face of the first pressing seat where the first step is located is a first face, and the first pressing seat is provided with a first shaft shoulder along the periphery of the first face.

[0012] According to some embodiments of the present application, a mounting cavity is formed between the first column and the second column, one end of the first column extends out of the mounting cavity, the end of the first column extending out of the mounting cavity is provided with a second step, and the outer diameter of the second step is smaller than the outer diameter of the first column.

[0013] According to some embodiments of the present application, the first through hole comprises a first light hole section and a first screw hole section coaxially arranged, the inner diameter of the first light hole section is larger than the inner diameter of the first screw hole section, the internal thread of the first through hole is arranged on the inner wall of the first screw hole section, the inside of the pressing piece is hollow to form a third through hole penetrating through the first shaft section and the second shaft section, the inner diameter of the third through hole is matched with the outer diameter of the first column, and the inner diameter of the third through hole is larger than the inner diameter of the first screw hole section.

[0014] According to some embodiments of the present application, the second through hole comprises a second light hole section and a second screw hole section with equal diameters, and the internal thread of the second through hole is arranged on the inner wall of the second screw hole section.

[0015] According to some embodiments of the present application, the inner diameter of the sink cavity is equal to the inner diameter of the second column.

[0016] According to some embodiments of the present application, the minimum inner diameter of the first groove is smaller than the inner diameter of the first step.

[0017] According to some embodiments of the present application, the first pressing seat comprises a base and a pressing ring, the pressing ring is fixedly sleeved on the base, the inside of the base is hollow to form the first through hole, and the first step is arranged on the end face of the pressing ring.

[0018] According to some embodiments of the present application, the pressing ring and the base are threadedly connected.

[0019] According to some embodiments of the present application, handles are arranged on the first pressing seat and the second pressing seat.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structure decomposition of the utility model;

[0023] Figure 2 is a cross-sectional view of the first pressure seat;

[0024] Figure 3 is a cross-sectional view of the second press seat;

[0025] Figure 4 It is a cross-sectional view of the pressing piece;

[0026] Figure 5 It is a schematic diagram of the use status of the disassembly method;

[0027] Figure 6 It is a schematic diagram of the use status of the assembly method;

[0028] Figure 7 This is a schematic diagram of the installed sealing ring.

[0029] Figure markings: first pressure seat 100; first through hole 110; first hole shoulder 111; first light hole section 112; first screw hole section 113; first step 120; first surface 130; first shaft shoulder 140; base 150; pressure ring 160; second pressure seat 200; first cylinder 210; second step 211; second cylinder 220; second hole shoulder 221; second through hole 230; second light hole section 231; second screw hole section 232; mounting cavity 240; screw rod 300; pressure piece 400; first shaft section 410; second shaft section 420; countersunk cavity 421; first groove 422; third through hole 430; handle 500; ratchet 610; bearing 620; bearing hub 630; sealing ring 631. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The utility model relates to a kind of flower drum ratchet wheel bearing dismounting tools, it is mainly used for the loading and unloading between ratchet wheel 610 and bearing 620 on peiling flower drum 630.The flower drum ratchet wheel bearing dismounting tool includes first pressure seat 100, second pressure seat 200, screw rod 300 and pressing piece 400.

[0032] As Figure 1 , Figure 2 , Figure 3 And Figure 4As shown, the first press seat 100 and the second press seat 200 can be configured in a columnar shape. The first press seat 100 is provided with a first through hole 110. In the direction shown in the figure, the first through hole 110 runs through the upper and lower sides of the first press seat 100. The first through hole 110 is provided with an internal thread. The internal thread can be provided on the entire wall of the first through hole 110, or on a portion of the first through hole 110. A first step 120 is provided on the lower side of the first press seat 100. The first step 120 is coaxially arranged around the first through hole 110, that is, the first step 120 is annular and protrudes downward from the lower side of the first press seat 100 along the axial direction of the first through hole 110. The outer and inner sides of the first step 120 can be set to be axially offset, that is, the axial length A of the inner side of the first step 120 is less than the axial length B of the outer side. The lower end of the first through hole 110 is closer to the first step 120 than the upper end. A first shoulder 111 is provided at the lower end of the first through hole 110. The provision of the first shoulder 111 results in a stepped lower end of the first through hole 110, with the inner diameter C at the lower end of the first through hole 110 being greater than the inner diameter D of the middle portion of the first through hole 110. The second pressure seat 200 comprises a first column 210 and a second column 220. The first column 210 is a hollow cylinder, and a second through hole 230 is axially defined in the first column 210. As shown in the figure, the axial direction of the first column 210 is the vertical direction, and the second through hole 230 extends through the upper and lower end surfaces of the first column 210. The inner wall of the second through hole 230 is provided with an internal thread, which may be provided on the entire wall of the second through hole 230 or on a portion of the wall of the second through hole 230. The second cylinder 220 is coaxially arranged around the first cylinder 210. The inner wall of the second cylinder 220 forms a space between the outer wall of the first cylinder 210, which is defined as the mounting cavity 240. The mounting cavity 240 is upwardly open, and the bottom of the mounting cavity 240 can be configured to be closed. A second shoulder 221 is provided on the inner wall of the second cylinder 220. The arrangement of the second shoulder 221 creates a stepped shape in the mounting cavity 240, with the upper inner diameter E of the second cylinder 220 being larger than the lower inner diameter F along the axial direction. The internal threads of the first through hole 110 and the second through hole 230 are of equal diameter. The screw 300 is inserted through the first through hole 110 and the second through hole 230 and is threadedly connected to the first through hole 110 and the second through hole 230. The first and second press seats 100 and 200 can rotate relative to the screw 300, and as they rotate, the first and second press seats 100 and 200 move closer or further away from each other. The pressing piece 400 is in the shape of a hollow stepped shaft, and includes a first shaft segment 410 and a second shaft segment 420. The outer diameter of the first shaft segment 410 is smaller than the outer diameter of the second shaft segment 420. The interiors of the first shaft segment 410 and the second shaft segment 420 are axially connected, that is, a third through hole 430 is formed inside the pressing piece 400, which axially penetrates the first shaft segment 410 and the second shaft segment 420.The outer diameter G of the first cylinder 210 is adapted to the inner diameter H of the third through hole 430 of the pressing piece 400, the first cylinder 210 can be inserted into the third through hole 430, wherein G=H or G is slightly smaller than H, so that after the first cylinder 210 is inserted into the third through hole 430, the pressing piece 400 will not shake relative to the first body. The outer diameter I of the end of the first shaft segment 410 away from the second shaft segment 420 is adapted to the outer diameter C of the end of the first through hole 110 close to the first hole shoulder 111, wherein I=C or I is slightly smaller than C, so that when the end of the first shaft segment 410 is inserted into the first through hole 110 and abuts against the first hole shoulder 111, it can not shake. The end surface of the second shaft segment 420 away from the first shaft segment 410 is provided with a sunken cavity 421. The sunken cavity 421 is provided with a first groove 422 on the plane. The first groove 422 is annular, coaxially arranged around the third through hole 430, that is, the first groove 422 is also coaxial with the second shaft segment 420. The first groove 422 can be tightly arranged on the cavity wall of the sunken cavity 421, that is, part of the cavity wall of the sunken cavity 421 also serves as the groove wall of the first groove 422 away from the axis of the third through hole 430. The inner diameter J of the sunken cavity 421 is adapted to the outer diameter K of the first step 120, wherein J=K or J is slightly larger than K. The first step 120 can extend into the sunken cavity 421, and the inner wall of the sunken cavity 421 abuts against the outer wall of the first step 120 to limit, avoiding the second shaft segment 420 from shaking relative to the first pressing seat 100.

[0033] The flower drum ratchet bearing dismounting tool has at least two use modes for the ratchet 610 and the bearing 620, including a dismounting mode and an assembling mode.

[0034] In the dismounting mode, as shown in FIG. 6A, Figure 5As shown, the bearing 620 is initially installed in the ratchet 610 with an interference fit. The ratchet 610 and the bearing 620 are coaxially placed into the mounting cavity 240. The outer diameter of the ratchet 610 is equal to or slightly smaller than the inner diameter of the upper portion of the second column 220. The upper portion of the ratchet extends outside the mounting cavity 240. The outer diameter of the first column 210 is equal to or slightly smaller than the inner diameter of the inner ring of the bearing 620. The first column 210 coaxially passes through the bearing 620 and the ratchet 610. The inner wall of the second column 220 restricts the radial movement of the ratchet 610. The bottom surface of the ratchet 610 abuts the second shoulder 221. The outer diameter of the outer ring of the bearing 620 is smaller than the inner diameter of the lower portion of the second column 220. The pressing piece 400 is then sleeved onto the first column 210 with the first shaft segment 410 facing in the direction of the ratchet 610. The end of the first shaft segment 410 passes through the ratchet 610 and abuts the inner ring of the bearing 620. Then screw the screw 300 into the second through hole 230, and then screw the first pressure seat 100 onto the screw 300 with the first step 120 facing downward. The first pressure seat 100 rotates relative to the screw 300 and gradually approaches the second shaft segment 420 until the first pressure seat 100 abuts against the second shaft segment 420. At this time, the first step 120 extends into the sinking cavity 421, and the sinking cavity 421 and the first step 120 cooperate with each other to limit radial shaking. Continue to rotate the first pressure seat 100, the first pressure seat 100 moves downward to push the pressure piece 400 downward, the ratchet 610 is fixed relative to the second pressure seat 200, and the pressure piece 400 moves downward to move the bearing 620 downward relative to the ratchet 610, so that the bearing 620 gradually moves downward out of the ratchet 610. When the bearing 620 completely moves out of the ratchet 610, the bearing 620 falls into the lower part of the mounting cavity 240. In this way, the bearing 620 is removed from the ratchet 610. Finally, the first pressing seat 100 or the second pressing seat 200 is screwed out of the screw rod 300 , and the ratchet 610 and the bearing 620 can be taken out of the installation cavity 240 .

[0035] In the assembly mode, Figure 6As shown, first place the ratchet 610 into the mounting cavity 240. The second shoulder 221 provides axial support for the ratchet 610, while the mounting cavity 240 radially limits the ratchet 610. Then, the bearing 620 is mounted on the first column 210, axially resting on the ratchet 610. The screw 300 is then installed into the second through-hole 230. The pressure piece 400 is mounted onto the first column 210 with the second shaft segment 420 facing the direction. The outer ring diameter of the bearing 620 is slightly smaller than or equal to the inner diameter of the countersunk cavity 421. The countersunk cavity 421 is mounted onto the bearing 620. The first pressure seat 100 is then screwed into the screw 300 with the first step 120 facing downward. The first pressure seat 100 rotates downward until the end of the first shaft segment 410 extends into the first through-hole 110 and abuts the first shoulder 111. The first pressure seat 100 continues to rotate downward, pushing the pressure piece 400 downward. As the pressing member 400 moves downward, it pushes the bearing 620 downward relative to the ratchet 610, gradually pressing the bearing 620 into the ratchet 610. Because the diameter of the first groove 422, located near the center axis of the third through-hole 430, is greater than or equal to the outer diameter of the outer ring of the bearing 620, the downward pressure can push the upper end surface of the bearing 620 below the upper end surface of the ratchet 610, thereby assembling the bearing 620 into the ratchet 610.

[0036] The hub ratchet bearing disassembly and assembly tool realizes the loading and unloading of the ratchet 610 and the bearing 620 through the positioning cooperation between the first pressure seat 100, the second pressure seat 200 and the pressure piece 400. During the loading and unloading process, the first pressure seat 100 and the pressure piece 400 move very stably without shaking, so that the bearing 620 can be moved in or out coaxially and stably relative to the ratchet 610, ensuring the loading and unloading accuracy of the bearing 620 and the ratchet 610.

[0037] In some specific embodiments of the present invention, Figure 2 As shown, the end face of the first pressure seat 100 where the first step 120 is located is the first face 130. In the direction shown in the figure, the first step 120 is located at the lower end face of the first pressure seat 100. The first pressure seat 100 is provided with a first shoulder 140 along the periphery of the first face 130. That is, the periphery of the first face 130 is stepped. The hub ratchet bearing disassembly and assembly tool also has a third way of use, which is to install the sealing ring 631 on the bearing hub 630. Figure 7As shown, the assembled hub ratchet bearing is placed into the bearing hub 630, and one end of the bearing hub 630 is then sleeved onto the first cylinder 210. The screw 300 passes through the bearing hub 630 and is inserted into the second through-hole 230. The sealing ring 631 is then sleeved onto the first shoulder 140, with the first shoulder 140 limiting the radial and axial position of the sealing ring 631. The first pressure seat 100 is then screwed into the screw 300 with the first surface 130 facing the direction. The first pressure seat 100 is rotated downward until the sealing ring 631 abuts the upper end of the bearing hub 630. The first pressure seat 100 is further rotated, and it presses the sealing ring 631 into the upper end of the bearing hub 630, thereby completing the installation of the sealing ring 631. After installing the sealing ring 631, the first pressure seat 100 is rotated upward, and the first shaft shoulder 140 is separated from the sealing ring 631, and the sealing ring 631 stays in the end of the bearing hub 630. Figure 3 As shown, one end (the upper end) of the first cylinder 210 extends out of the mounting cavity 240. A second step 211 is provided at the end of the first cylinder 210 extending into the mounting cavity 240 (i.e., the upper end of the first cylinder 210). The outer diameter L of the second step 211 is smaller than the outer diameter G of the first cylinder 210. The bearing hub 630 is mounted on the first cylinder 210, abutting against the bearing hub 630 via the second step 211, thereby limiting the insertion depth of the bearing hub 630 relative to the first cylinder 210.

[0038] In some specific embodiments of the present invention, Figure 2 and Figure 3 As shown, the first through hole 110 includes a first light hole section 112 and a first screw hole section 113 arranged coaxially. The inner diameter of the first light hole section 112 is larger than the inner diameter of the first screw hole section 113. The internal thread of the first through hole 110 is arranged on the inner wall of the first screw hole section 113. The first hole shoulder 111 is arranged at the end of the first light hole section 112. The interior of the pressing piece 400 is hollow to form a third through hole 430 that passes through the first shaft section 410 and the second shaft section 420. The inner diameter of the third through hole 430 is adapted to the outer diameter of the first column 210. The inner diameter of the third through hole 430 is larger than the inner diameter of the first screw hole section 113, ensuring that the screw rod 300 can smoothly pass through the third through hole 430. The second through hole 230 includes a second light hole section 231 and a second screw hole section 232 of equal diameter. The internal thread of the second through hole 230 is arranged on the inner wall of the second screw hole section 232. This can reduce the friction force when the screw rod 300 and the first through hole 110 and the second through hole 230 rotate relative to each other.

[0039] In some specific embodiments of the present invention, the inner diameter of the sink cavity 421 is equal to the inner diameter of the second column 220. When the bearing 620 is installed, the sink cavity 421 presses down on the bearing 620, and the upper portion of the ratchet 610 can extend into the sink cavity 421 until the ratchet 610 abuts against the plane of the sink cavity 421, thereby limiting the depth of the bearing 620 pressed into the ratchet 610.

[0040] In some specific embodiments of the present invention, the minimum inner diameter of the first groove 422 is smaller than the inner diameter of the first step 120. The minimum inner diameter of the first groove 422 is the diameter M of the groove wall of the first groove 422 close to the central axis of the third through hole 430, where M is smaller than the inner diameter N of the first step 120. When the first step 120 extends into the sinking cavity 421, the first groove 422 can avoid the first step 120, allowing the sinking cavity 421 to stably fit outside the first step 120 and abut against the first surface 130 outside the first step 120.

[0041] In some specific embodiments of the present invention, Figure 2 As shown, the first pressure seat 100 includes a base 150 and a pressure ring 160. The pressure ring 160 is sleeved and fixed on the base 150. The base 150 is hollowed to form a first through-hole 110, and a first step 120 is provided on the end surface of the pressure ring 160. Different pressure rings 160 can be replaced depending on the model of the hub ratchet bearing. The pressure ring 160 and the base 150 are threaded together to facilitate installation.

[0042] In some embodiments of the present invention, a handle 500 is provided on each of the first pressing seat 100 and the second pressing seat 200. The handle 500 can be inserted radially of the first pressing seat 100 / the second pressing seat 200 to facilitate rotation of the first pressing seat 100 and the second pressing seat 200.

[0043] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] Throughout this specification, references to "some specific embodiments" and the like indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0047] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hub ratchet bearing disassembly and assembly tool, characterized in that: include: A first pressure seat (100), wherein the first pressure seat (100) is provided with a first through hole (110) having an internal thread, an end surface of the first pressure seat (100) penetrated by the first through hole (110) is provided with a first step (120) coaxially surrounding the first through hole (110), and an end portion of the first through hole (110) close to the first step (120) is provided with a first hole shoulder (111); A second pressure seat (200), the second pressure seat (200) comprising a first column (210) and a second column (220) coaxially arranged around the first column (210), the first column (210) being provided with a second through hole (230) having an internal thread along the axial direction, and the inner wall of the second column (220) being provided with a second hole shoulder (221); a screw (300) capable of being threadably connected to the first through hole (110) and the second through hole (230); A pressing piece (400) includes a hollow first shaft segment (410) and a coaxially arranged second shaft segment (420), the outer diameter of the first shaft segment (410) is smaller than the outer diameter of the second shaft segment (420), the outer diameter of the first column (210) is adapted to the inner diameter of the pressing piece (400), the outer diameter of the end of the first shaft segment (410) is adapted to the inner diameter of the end of the first through hole (110) close to the first hole shoulder (111), a sinking cavity (421) is provided on the end surface of the second shaft segment (420) away from the first shaft segment (410), a first groove (422) in the form of an annular ring and coaxially arranged with the second shaft segment (420) is provided on the plane of the sinking cavity (421), and the inner diameter of the sinking cavity (421) is adapted to the outer diameter of the first step (120).

2. The hub ratchet bearing disassembly and assembly tool according to claim 1, characterized in that: The end surface of the first pressure seat (100) where the first step (120) is located is a first surface (130), and the first pressure seat (100) is provided with a first shaft shoulder (140) along the periphery of the first surface (130).

3. The hub ratchet bearing disassembly and assembly tool according to claim 2, characterized in that: An installation cavity (240) is formed between the first column (210) and the second column (220), one end of the first column (210) extends out of the installation cavity (240), and a second step (211) is provided at the end of the first column (210) extending into the installation cavity (240), and the outer diameter of the second step (211) is smaller than the outer diameter of the first column (210).

4. The hub ratchet bearing disassembly and assembly tool according to claim 1, characterized in that: The first through hole (110) includes a first light hole section (112) and a first screw hole section (113) that are coaxially arranged. The inner diameter of the first light hole section (112) is larger than the inner diameter of the first screw hole section (113). The internal thread of the first through hole (110) is arranged on the inner wall of the first screw hole section (113). The interior of the pressing piece (400) is hollow to form a third through hole (430) that passes through the first shaft section (410) and the second shaft section (420). The inner diameter of the third through hole (430) is adapted to the outer diameter of the first column (210). The inner diameter of the third through hole (430) is larger than the inner diameter of the first screw hole section (113).

5. The hub ratchet bearing disassembly and assembly tool according to claim 4, characterized in that: The second through hole (230) comprises a second light hole section (231) and a second screw hole section (232) of equal diameter, and the internal thread of the second through hole (230) is arranged on the inner wall of the second screw hole section (232).

6. The hub ratchet bearing disassembly and assembly tool according to claim 1, characterized in that: The inner diameter of the sink cavity (421) is equal to the inner diameter of the second column (220).

7. The hub ratchet bearing disassembly and assembly tool according to claim 6, characterized in that: The minimum inner diameter of the first groove (422) is smaller than the inner diameter of the first step (120).

8. The hub ratchet bearing disassembly and assembly tool according to claim 1, characterized in that: The first pressure seat (100) includes a base (150) and a pressure ring (160), wherein the pressure ring (160) is sleeved and fixed on the base (150), the interior of the base (150) is hollow to form the first through hole (110), and the first step (120) is arranged on the end face of the pressure ring (160).

9. The hub ratchet bearing disassembly and assembly tool according to claim 8, characterized in that: The pressure ring (160) and the base (150) are connected by threads.

10. The hub ratchet bearing disassembly and assembly tool according to claim 1, characterized in that: Both the first pressing seat (100) and the second pressing seat (200) are provided with a handle (500).

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