Novel tooth sheet locking structure

Abstract

The utility model provides a novel tooth piece locking structure which comprises a crank, a tooth piece and a locking piece, an installation hole is formed in one end of the crank, an annular installation table is arranged on the periphery of a hole opening, facing the tooth piece, of the installation hole, external spline teeth are arranged on the outer wall of the annular installation table, internal threads are arranged on the inner wall of the annular installation table, and a through hole is formed in the tooth piece. The diameter of the through hole is equal to the outer diameter of the annular mounting table, inner spline teeth matched with the outer spline teeth are arranged on the hole wall of the through hole, the locking piece is in a hollow T-shaped shaft shape and is provided with a locking section and a clamping section, the diameter of the locking section is equal to the inner diameter of the annular mounting table, and outer threads meshed with the inner threads are arranged on the outer wall of the locking section. The diameter of the clamping section is larger than that of the through hole. According to the utility model, the locking piece is matched with the annular mounting table on the crank to fasten the tooth sheet, so that the mounting steps are simplified, a user can replace the tooth sheet conveniently after purchasing, the user can assemble diversified use products in a DIY (do it yourself) manner, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a novel gear plate locking structure. Background Art

[0002] like Figure 1 and Figure 2 As shown, when the gear piece 2 ' is fixed to the crank 1 ' in the conventional manner, screw holes are opened on the crank 1 ', through holes are opened on the gear piece 2 ', and finally the gear piece 2 ' is fixed to the crank 1 ' by screws 3 '.

[0003] However, this fixing method requires turning multiple screws 3' in sequence to secure the sprocket 2' to the crank 1', which makes the installation process cumbersome and reduces installation efficiency. Furthermore, manually turning the screws 3' generally results in different tightening degrees for each screw 3', which affects the fixing effect between the sprocket 2' and the crank 1' and increases the risk of the sprocket 2' coming loose.

[0004] Furthermore, the screws 3' used to secure the sprocket 2' to the crank 1' in conventional methods typically have a thread size of M5*0.8, limiting their tightening force to 7-9 Nm. Excessive tightening force can cause the sprockets to slip, while insufficient tightening force can cause the sprockets to loosen, increasing installation difficulty. Therefore, conventional methods of securing the sprocket 2' to the crank 1' have limitations. Utility Model Content

[0005] The utility model is developed to solve the above problems, and its purpose is to provide a new gear locking structure.

[0006] The utility model provides a novel gear plate locking structure with the following characteristics, including: a crank, a gear plate and a locking piece, a mounting hole is provided on one end of the crank, an annular mounting platform is provided on the outer periphery of the mounting hole facing the hole of the gear plate, the outer wall of the annular mounting platform is provided with external spline teeth, and the inner wall is provided with internal threads, a through hole is provided on the gear plate, the diameter of the through hole is equal to the outer diameter of the annular mounting platform, the hole wall of the through hole is provided with internal spline teeth matching the external spline teeth, the locking piece is in the shape of a hollow T-shaped shaft, and has a locking section and a locking section, the outer diameter of the locking section is smaller than the outer diameter of the locking section, the inner diameter of the locking section is equal to the inner diameter of the locking section, the diameter of the locking section is equal to the inner diameter of the annular mounting platform, the outer wall of the locking section is provided with external threads that mesh with the internal threads, and the diameter of the locking section is larger than the diameter of the through hole.

[0007] The novel tooth plate locking structure provided by the present invention can also have the following feature: the inner diameter of the locking member is equal to the diameter of the mounting hole.

[0008] The novel tooth plate locking structure provided by the present invention may also have the following feature: the inner wall of the locking piece is provided with riveted teeth.

[0009] The novel tooth plate locking structure provided by the present invention may also have the following feature: the thread pattern of the external thread on the outer wall of the locking section is M35.

[0010] The novel tooth plate locking structure provided by the present invention can also have the following feature: the inner diameter of the annular mounting platform is larger than the diameter of the mounting hole.

[0011] Functions and effects of utility models

[0012] Compared to traditional methods, the new sprocket locking structure of this utility model replaces the original multiple screws with a single locking member. Specifically, the locking member cooperates with the annular mounting platform on the crank to secure the sprocket. This simplifies the installation process and improves installation and replacement efficiency, making it easier for users to replace sprockets after purchase. This allows users to DIY and assemble the product for a more diverse use, improving the user experience. Furthermore, the threaded grooves on the locking member are increased, making installation easier, improving the strength after tightening, and indirectly extending the service life of the crank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structural decomposition of the prior art;

[0014] Figure 2 It is a cross-sectional schematic diagram of the prior art;

[0015] Figure 3 It is a schematic diagram of the structure decomposition of the utility model;

[0016] Figure 4 It is a cross-sectional schematic diagram of the present utility model.

[0017] Description of reference numerals:

[0018] 1. Crank; 11. Mounting hole; 12. Annular mounting platform; 13. External spline teeth; 14. Internal thread; 2. Gear; 21. Through hole;

[0019] 22. Internal spline teeth; 3. Locking piece; 31. Locking section; 32. Positioning section; 33. External thread; 34. Riveted tooth profile. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is described in detail in the following embodiments with reference to the accompanying drawings.

[0021] Example

[0022] Figure 3 This is a schematic diagram of the structure decomposition of the utility model. Figure 4 It is a cross-sectional schematic diagram of the present utility model.

[0023] like Figure 3 and Figure 4 As shown, this embodiment provides a new gear locking structure, including: a crank 1, a gear 2, and a locking member 3.

[0024] In this embodiment, a mounting hole 11 is formed at one end of the crank 1. An annular mounting platform 12 is provided on the outer periphery of the opening of the mounting hole 11 facing the gear plate 2. The outer wall of the annular mounting platform 12 is provided with external spline teeth 13, and the inner wall is provided with internal threads 14. The mounting hole 11 is a through-hole structure.

[0025] In this embodiment, the inner diameter of the annular mounting platform 12 is larger than the diameter of the mounting hole 11 .

[0026] In this embodiment, a through hole 21 is formed on the tooth plate 2 . The diameter of the through hole 21 is equal to the outer diameter of the annular mounting platform 12 . The wall of the through hole 21 is provided with internal spline teeth 22 that cooperate with the external spline teeth 13 .

[0027] In this embodiment, the locking member 3 is in the shape of a hollow T-shaped shaft, having a locking section 31 and a locking section 32. The outer diameter of the locking section 31 is smaller than the outer diameter of the locking section 32, the inner diameter of the locking section 31 is equal to the inner diameter of the locking section 32, the diameter of the locking section 31 is equal to the inner diameter of the annular mounting platform 12, and an external thread 33 is provided on the outer wall of the locking section 31, which is engaged with the internal thread 14. The diameter of the locking section 32 is larger than the diameter of the through hole 21.

[0028] In this embodiment, the inner diameter of the locking member 3 is equal to the diameter of the mounting hole 11 .

[0029] In this embodiment, the inner wall of the locking member 3 is provided with a riveted tooth shape 34. The riveted tooth shape 34 provided on the inner wall of the locking member 3 is used to facilitate the locking effect of the center shaft when the center shaft is installed on the crank 1, thereby indirectly improving the practical effect of the present invention.

[0030] In this embodiment, the thread pattern of the external thread 33 on the outer wall of the locking section 31 is M35.

[0031] In this embodiment, the length of the locking section 31 is not greater than the depth of the annular mounting platform 12 .

[0032] During assembly, first snap the sprocket 2 onto the crank 1. Specifically, because the diameter of the through hole 21 on the sprocket 2 is equal to the outer diameter of the annular mounting block 12, it is only necessary to align the through hole 21 on the sprocket 2 with the annular mounting block 12 on one end of the crank 1 and align the internal spline teeth 22 on the inner wall of the through hole 21 with the external spline teeth 13 on the annular mounting block 12. This allows the sprocket 2 to be pushed and snapped onto the crank 1.

[0033] Finally, the locking member 3 is passed through the sprocket 2 and then rotated to secure it to the crank 1, either manually or with the aid of a tool (e.g., an open-end wrench or adjustable wrench). This secures the sprocket 2 to the crank 1. Specifically, because the outer diameter of the locking section 31 on the locking member 3 is equal to the inner diameter of the annular mounting platform 12, the outer diameter of the locking section 31 is also smaller than the diameter of the through-hole 21. Therefore, the locking section 31 of the locking member 3 can be passed through the through-hole 21 of the sprocket 2. Furthermore, because the outer wall of the locking section 31 and the inner wall of the annular mounting platform 12 are respectively provided with intermeshing external threads 33 and internal threads 14, the locking member 3 can be secured to the crank 1 by rotating it. Furthermore, because the diameter of the locking section 32 on the locking member 3 is larger than the diameter of the through-hole 21 and the length of the locking section 31 is no longer than the depth of the annular mounting platform 12, the sprocket 2 can be further secured to the crank 1. Furthermore, since the locking section 31 of the locking member 3 is inserted into the annular mounting platform 12 and then threadedly connected to the annular mounting platform 12, the connection is protected from external debris such as rainwater and dust, thereby further extending the service life of the present invention. Furthermore, external debris is prevented from entering the mounting hole 11 through the connection between the locking member 3 and the annular mounting platform 12, thereby ensuring the practical effect and service life of the bicycle after using the present invention.

[0034] Functions and Effects of the Embodiments

[0035] Compared to traditional methods, the new sprocket locking structure of this utility model replaces the original multiple screws with a single locking member. Specifically, the locking member cooperates with the annular mounting platform on the crank to secure the sprocket. This simplifies the installation process and improves installation and replacement efficiency, making it easier for users to replace sprockets after purchase. This allows users to DIY and assemble the product for a more diverse use, improving the user experience. Furthermore, the threaded grooves on the locking member are increased, making installation easier, improving the strength after tightening, and indirectly extending the service life of the crank.

[0036] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A new gear locking structure, characterized in that: include: Cranks, gears and locking parts, A mounting hole is provided on one end of the crank, and an annular mounting platform is provided on the outer periphery of the mounting hole facing the hole of the gear plate. The outer wall of the annular mounting platform is provided with external spline teeth, and the inner wall is provided with internal threads. The tooth plate is provided with a through hole, the diameter of which is equal to the outer diameter of the annular mounting platform, and the hole wall of the through hole is provided with internal spline teeth that cooperate with the external spline teeth. The locking piece is in the shape of a hollow T-shaped shaft, and has a locking section and a locking section. The outer diameter of the locking section is smaller than the outer diameter of the locking section, the inner diameter of the locking section is equal to the inner diameter of the locking section, and the diameter of the locking section is equal to the inner diameter of the annular mounting platform. An external thread that engages with the internal thread is provided on the outer wall of the locking section, and the diameter of the locking section is larger than the diameter of the through hole.

2. The novel tooth plate locking structure according to claim 1 is characterized in that: in, The inner diameter of the locking member is equal to the diameter of the mounting hole.

3. The novel tooth plate locking structure according to claim 1 is characterized in that: in, The inner wall of the locking piece is provided with riveted teeth.

4. The novel tooth plate locking structure according to claim 1 is characterized in that: in, The outer thread on the outer wall of the locking section has a thread size of M35.

5. The novel tooth plate locking structure according to claim 1 is characterized in that: in, The inner diameter of the annular mounting platform is larger than the diameter of the mounting hole.

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