Tool for installing center shaft dustproof assembly

Abstract

The utility model discloses a kind of tool of installing middle shaft dustproof assembly, wherein, contain support, through hole is equipped in support, the sunken groove of diameter greater than the diameter of through hole is set in support top, and sunken groove is used to install middle shaft dustproof assembly;Press head, one end of press head is positioned circular table and is inserted into through hole and is inserted into middle shaft dustproof assembly, guarantee assembly concentricity, the other end is limit circular table, positioned circular table and limit circular table between being equipped with the positioning shaft shoulder connected with middle shaft dustproof assembly, the junction of positioned circular table and positioning shaft shoulder is inclined plane, and the junction with limit circular table is plane, positioning shaft shoulder is used to position dustproof cover, plane is used to press pack dustproof cover, through hole is used to cooperate with press head positioning, the diameter of positioned circular table is consistent with through hole;The diameter of positioned circular table is less than the diameter of limit circular table, and the diameter of positioning shaft shoulder is between positioned circular table diameter and limit circular table diameter.

Description

Technical Field

[0001] This utility model relates to the field of central axis dustproof components, specifically to a tooling for installing central axis dustproof components. Background Technology

[0002] Among existing devices for installing dustproof components on bicycle bottom brackets, such as Figure 4 As shown, most systems consist of a threaded pressure ring, a lead screw, a pad, a surface bearing, a retainer, and a nut. During use, the threaded pressure ring needs to be disassembled, the central shaft bearing inserted into the retainer and pressed against the pad, and then the dust cover installed on the threaded pressure ring. Finally, the threaded pressure ring with the dust cover is tightened to one end of the retainer, connecting and securing the dust cover to the central shaft bearing. The installation of the threaded pressure ring, pad, and retainer requires the use of a lead screw, surface bearing, and nut for connection and fixation. This structure is overly complex, with numerous parts, and its installation is cumbersome and inconvenient to use, resulting in low efficiency during installation and disassembly. Therefore, a tooling for installing the central shaft dust cover assembly that facilitates installation and disassembly is needed to effectively increase its working efficiency. Utility Model Content

[0003] The technical problem this utility model aims to solve is that existing dustproof component installation devices often consist of parts such as threaded pressure rings, lead screws, pads, plane bearings, retainers, and nuts. These devices are overly complex, have numerous parts, and are cumbersome to install, making them inconvenient to use and resulting in low efficiency during installation and disassembly. This utility model provides a tooling for installing a central shaft dustproof component. The tooling, composed of a support and a pressure head, is used to install the central shaft dustproof component. It has a simple structure, is extremely easy to operate, and is simple to install and disassemble, making it more suitable for assembly line operations and mass production. This effectively improves installation and disassembly efficiency and is easy to use, thus overcoming the shortcomings of existing technologies.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A tooling for installing a dustproof assembly for a central shaft includes a support with a through hole and a recessed groove with a diameter larger than that of the through hole at the top of the support. The recessed groove is used to install the dustproof assembly for the central shaft. The pressure head has a positioning frustum at one end, which penetrates the central axis dustproof assembly and is inserted into the through hole to ensure the coaxiality of the assembly. The other end is a limiting frustum. A positioning shoulder is provided between the positioning frustum and the limiting frustum to connect with the central axis dustproof assembly. The through hole is used to cooperate with the pressure head for positioning. This solution allows for the installation of the central shaft dustproof assembly. It features a simple structure and extremely convenient operation. Its easy installation and disassembly make it more suitable for assembly line operations, enabling mass production and effectively improving installation and disassembly efficiency. It is also easy to use.

[0005] In the aforementioned fixture for installing a central shaft dustproof assembly, the diameter of the positioning frustum is smaller than the diameter of the limiting frustum, and the diameter of the positioning shoulder is between the diameter of the positioning frustum and the diameter of the limiting frustum.

[0006] The above-mentioned tooling for installing a central shaft dustproof assembly, wherein the connection between the positioning shoulder and the positioning frustum is an inclined surface, and the connection with the limiting frustum is a flat surface, the positioning shoulder is used to position the dustproof cover, and the flat surface is used to press the dustproof cover.

[0007] The aforementioned fixture for installing a central shaft dustproof component includes a positioning frustum with the same diameter as the through hole, allowing the positioning frustum to fit snugly after being inserted into the through hole.

[0008] The above-mentioned tooling for installing a central shaft dustproof assembly includes a dustproof cover and a central shaft bearing. The central shaft bearing is inserted into the recessed groove, and the recessed groove and the external thread of the central shaft bearing have a fit tolerance to ensure that the central shaft bearing and the dustproof cover are coaxial. The dustproof cover is inserted into the central shaft bearing from the top of the central shaft bearing, and one end of the positioning frustum of the pressure head is inserted into the dustproof cover, with a portion of it being fitted with the support.

[0009] The aforementioned tooling for installing a dustproof assembly for the central shaft has a knob end diameter at the top of the central shaft bearing that is larger than the threaded end diameter at the bottom of the central shaft bearing, thus enabling the central shaft bearing to be fixedly installed on the support.

[0010] The above-mentioned tooling for installing a central shaft dustproof assembly includes a limit ring installed on the outer wall of the top of the dustproof cover, which, after being inserted into the central shaft bearing, serves to prevent the central shaft bearing from falling off.

[0011] The tooling process for installing the dustproof assembly for the central shaft described above is as follows: The bottom bracket bearing is installed in the recessed groove of the support for positioning and installation. The dust cover is placed on the positioning shoulder of the pressure head, and then the pressure head is inserted into the through hole of the support. The pressure head is pressed down with a press, and the pressure head presses the dust cover into the inner hole of the bottom bracket bearing to complete the assembly. This is used to install the dust cover of the bicycle bottom bracket into the bottom bracket bearing for storage.

[0012] This application uses only the support and the pressure head to connect and fix the dust cover and the central shaft bearing. The prior art requires threaded pressure rings, pads and retainers for connection and fixation, but it also requires the use of screws, plane bearings, nuts and other parts for fixation. Its structure is too complicated and has many parts. Compared with the prior art, it has the advantages of simple structure, easy disassembly and installation, and is more suitable for assembly line operation and mass production.

[0013] The technical solution provided by the tooling for installing the central shaft dustproof component according to the present invention has the following technical effects: the tooling assembled from the support and the pressure head is used to install the central shaft dustproof component. The structure is simple and the operation is extremely convenient. Its installation and disassembly are simple, making it more suitable for assembly line operations, enabling mass production, effectively improving installation and disassembly efficiency, and facilitating use. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of a tooling for installing a central shaft dustproof component according to the present invention. Figure 2 This is a cross-sectional structural diagram of a tooling for installing a central shaft dustproof component according to the present invention; Figure 3 This is a schematic cross-sectional view of the tooling for installing the dustproof component of the central shaft according to the present invention after installation. Figure 4 This is a schematic diagram of the existing technology.

[0015] The reference numerals in the attached drawings are as follows: support 100, pressure head 200, dust cover 300, central shaft bearing 400, through hole 101, recessed groove 102, positioning frustum 201, limiting frustum 202, positioning shoulder 203, inclined surface 204, plane 205, limiting ring 301, knob end 401, threaded end 402. Detailed Implementation

[0016] In order to make the technical means, inventive features, objectives and effects of the utility model easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to specific illustrations. Obviously, the described embodiments are some embodiments of the utility model, but not all embodiments.

[0017] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0020] This utility model provides a tooling for installing a central shaft dustproof component. The purpose is to install the central shaft dustproof component using a tooling assembled from a support and a pressure head. The structure is simple, the operation is extremely convenient, and the installation and disassembly are simple. It is more suitable for assembly line operations, can be mass-produced, effectively improves the efficiency of installation and disassembly, and is easy to use.

[0021] like Figure 1-3 As shown, a tooling for installing a central shaft dustproof component includes a support 100, a through hole 101 through the support 100, and a recessed groove 102 with a diameter larger than that of the through hole 101 at the top of the support 100. The recessed groove 102 is used to install the central shaft dustproof component. like Figure 3 As shown, the pressure head 200 has a positioning frustum 201 at one end, which penetrates the central dustproof assembly insertion hole 101 to ensure the coaxiality of the assembly. The other end is a limiting frustum 202. A positioning shoulder 203, which connects to the central dustproof assembly, is provided between the positioning frustum 201 and the limiting frustum 202. The connection between the positioning shoulder 203 and the positioning frustum 201 is a slope 204, and the connection between the positioning shoulder 203 and the limiting frustum 202 is a plane 205. The positioning shoulder 203 is used to position the dustproof cover 300, and the plane 205 is used for pressing. The dust cover 300 is installed, and the through hole 101 is used to position the pressure head 200. The diameter of the positioning frustum 201 is the same as that of the through hole 101. The diameter of the positioning frustum 201 is smaller than that of the limiting frustum 202. The diameter of the positioning shoulder 203 is between the diameter of the positioning frustum 201 and the diameter of the limiting frustum 202. It is used for the installation of the central shaft dustproof assembly. The structure is simple, making the operation extremely convenient. Its installation and disassembly are simple, making it more suitable for assembly line operations and enabling mass production, effectively improving the efficiency of installation and disassembly.

[0022] The central shaft dustproof assembly includes a dust cover 300 and a central shaft bearing 400. The central shaft bearing 400 is inserted into a recessed groove 102. The external threads of the recessed groove 102 and the central shaft bearing 400 have a fit tolerance to ensure that the central shaft bearing 400 and the dust cover 300 are coaxial. The dust cover 300 is inserted into the central shaft bearing 400 from the top. One end of the positioning frustum 201 of the pressure head 200 is inserted into the dust cover 300, and part of it is fitted with a support 100. The diameter of the knob end 401 at the top of the central shaft bearing 400 is larger than the diameter of the threaded end 402 at the bottom of the central shaft bearing 400. A limit ring 301 is installed on the outer wall of the top of the dust cover 300, which prevents the central shaft bearing 400 from falling off after being inserted into the central shaft bearing 400.

[0023] The process of using a tooling for installing a central shaft dustproof assembly is as follows: Install the bottom bracket bearing 400 in the recessed groove 102 of the support 100 for positioning. Place the dust cover 300 on the positioning shoulder 203 of the pressure head 200, and then insert the pressure head 200 into the through hole 101 of the support 100. Use a press to press down the pressure head 200, and the pressure head 200 will press the dust cover 300 into the inner hole of the bottom bracket bearing 400 to complete the assembly. This is used to install the dust cover 300 of the bicycle bottom bracket into the bottom bracket bearing 400 for storage.

[0024] In summary, the tooling for installing the central shaft dustproof component of this utility model uses a tooling assembled from a support and a pressure head to install the central shaft dustproof component. It has a simple structure, is extremely easy to operate, and is simple to install and disassemble. It is more suitable for assembly line operations, can be mass-produced, effectively improves installation and disassembly efficiency, and is easy to use.

[0025] The specific embodiments of the utility model have been described above. It should be understood that the utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; those skilled in the art can make various modifications or alterations within the scope of the claims, and make several simple deductions, modifications or substitutions, which do not affect the substantive content of the utility model.

Claims

1. A tooling for installing a dustproof assembly for a central shaft, characterized in that, Includes a support, wherein a through hole is provided through the support, and a recessed groove with a diameter larger than the diameter of the through hole is provided on the top of the support, the recessed groove being used to install the central shaft dustproof assembly; The pressure head has a positioning frustum at one end, which penetrates the central axis dustproof assembly and is inserted into the through hole, and a limiting frustum at the other end. A positioning shoulder is provided between the positioning frustum and the limiting frustum to connect with the central axis dustproof assembly.

2. The tooling for installing a dustproof assembly for a central shaft according to claim 1, characterized in that, The diameter of the positioning frustum is smaller than the diameter of the limiting frustum, and the diameter of the positioning shoulder is between the diameter of the positioning frustum and the diameter of the limiting frustum.

3. The tooling for installing a dustproof assembly for a central shaft according to claim 2, characterized in that, The connection between the positioning shoulder and the positioning frustum is an inclined surface, while the connection between the shoulder and the limiting frustum is a flat surface.

4. The tooling for installing a dustproof assembly for a central shaft according to claim 1, characterized in that, The diameter of the positioning frustum is the same as that of the through hole.

5. The tooling for installing a dustproof assembly for a central shaft according to claim 1, characterized in that, The central shaft dustproof assembly includes a dustproof cover and a central shaft bearing. The central shaft bearing is inserted into the sinking groove. The dustproof cover is inserted into the central shaft bearing from the top. One end of the positioning frustum of the pressure head is inserted into the dustproof cover, and part of it is in contact with the support.

6. The tooling for installing a dustproof assembly for a central shaft according to claim 5, characterized in that, The diameter of the knob end at the top of the central shaft bearing is larger than the diameter of the threaded end at the bottom of the central shaft bearing.

7. The tooling for installing a dustproof assembly for a central shaft according to claim 5, characterized in that, The sinker groove has a fit tolerance with the external thread at the threaded end of the central shaft bearing.

8. The tooling for installing a dustproof assembly for a central shaft according to claim 6, characterized in that, A limit ring is installed on the outer wall of the top of the dust cover.

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