Crankset assembly with anti-slip tooth protection disc structure

Abstract

The utility model provides a chain wheel assembly with an anti-slip tooth protection disc structure, which comprises a crank, a first tooth sheet, a second tooth sheet, a protection disc and a plurality of locking assemblies, one end of the crank is provided with a mounting hole connected with a shaft core, the periphery of one end of the crank is provided with a plurality of crank claws, each crank claw is provided with a mounting hole, and the locking assemblies are connected with the first tooth sheet and the second tooth sheet. The first tooth piece and the second tooth piece are each provided with a plurality of tooth piece holes, each tooth piece hole corresponds to one installation hole, the end face, facing the crank, of the protection disc is provided with a plurality of installation grooves, each installation groove corresponds to one installation hole, and each locking assembly comprises a screw and a nut. The nut is fixed to the end face, facing the crank, of the protection disc, and the locking part of the screw and the nut is located in the nut, so that the nut is prevented from being exposed, meanwhile, the locking part of the screw and the nut can be prevented from being eroded by water and dust, and the use effect and the service life of the nut are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle accessories, in particular to a crankset assembly with an anti-slip crankset protection structure. Background Art

[0002] like Figure 1 and Figure 2 As shown, the conventional crankset with claws has a split-lock structure, including two sets of locking parts 1', tooth plates 2', protective plates 3', and cranks 4'. However, after assembly, the protective plate and crankset structure of the transmission has the following problems:

[0003] 1. The locking member 1' (usually a screw-nut combination) is exposed, affecting the overall appearance. It is also easily eroded by rain, sand and dust, which affects the strength and lifespan, posing a safety hazard to the rider.

[0004] 2. Because the protective plate 3' is often made of plastic, while the sprockets 2' are typically made of iron, the locking mechanism can easily cause the protective plate 3' to slip or become loose due to poor control of the locking force. Furthermore, if the protective plate 3' slips, it is generally unusable, requiring replacement, which wastes material and increases costs. Furthermore, even if the protective plate 3' is securely locked to the sprockets 2', it can become loose over time, making it difficult to maintain stability. Utility Model Content

[0005] The utility model is developed to solve the above problems, and aims to provide a crankset assembly with an anti-slip crankset protection structure.

[0006] The utility model provides a crank assembly with an anti-slip tooth protection plate structure, which has the following characteristics: a crank, a first tooth plate, a second tooth plate, a protection plate, and a plurality of locking components.

[0007] One end of the crank is provided with a mounting hole connected to the shaft core, and a plurality of crank claws are provided on the outer periphery of one end of the crank, each crank claw has a mounting hole.

[0008] The first and second gear plates are each provided with a plurality of gear plate holes, each of which corresponds to a mounting hole.

[0009] There are multiple mounting grooves on the end surface of the protective plate facing the crank, and each mounting groove corresponds to a mounting hole.

[0010] Each locking assembly includes a screw and a nut. The screw has a rod portion, and an external thread is provided on the outer wall of the rod portion. The nut is columnar and is disposed in an installation groove. A groove is axially formed inside the nut, and the notch of the groove is located on the end face of the nut facing the crank. Internal threads meshing with the external threads are provided on the inner wall of the groove.

[0011] Among them, each nut passes through the tooth hole on the second tooth piece and the installation hole on the crank claw in sequence and is located in the tooth hole on the first tooth piece, so that the protection disc and the second tooth piece are fixed on one side of the crank. The rod portion of each screw passes through the tooth hole on the first tooth piece and enters the groove on the nut and locks with it, so that the first tooth piece is fixed on the other side of the crank.

[0012] In the chainring assembly with an anti-slip tooth protection disc structure provided by the present utility model, it can also have the following feature: the protection disc is a protection disc made of plastic material.

[0013] In the chainring assembly with an anti-slip tooth protection disc structure provided by the present utility model, it can also have the following feature: a nut is fixedly provided in each installation groove.

[0014] In the chainring assembly with an anti-slip tooth protection disc structure provided by the present utility model, it can also have the following feature: the diameter of the groove is larger than the diameter of the tooth hole, and the nut has a stepped structure matching the installation hole and the tooth hole.

[0015] In the chainring assembly with an anti-slip tooth protection disc structure provided by the present utility model, it can also have the following feature: the screw has an outer edge protruding outward from the rod portion.

[0016] Functions and effects of the utility model

[0017] According to the chainring assembly with an anti-slip tooth protection disc structure involved in the present utility model, it aims to fix the nut on the end face of the protection disc facing the crank, and the locking part of the screw and the nut is located inside the nut, so as to avoid the nut being exposed outside, and at the same time, it can also avoid the locking part of the screw and the nut being eroded by water and dust, thereby ensuring the use effect and service life of the present utility model and providing safety guarantee for cyclists.

[0018] In addition, by fixedly arranging the nut in the installation groove on the end face of the protection disc, it can avoid the situation of slipping teeth or not being tightly locked when fixing the tooth piece and the protection disc on the crank, so that the protection disc will not be replaced due to slipping, nor will it become loose after long-term use. Therefore, when using the present utility model, there will be no situation of wasting materials and increasing costs, and the stability after long-term use can be ensured. Description of the drawings

[0019] Figure 1 is a schematic structural diagram of a split-lock chainring in the prior art;

[0020] Figure 2 It is a cross-sectional schematic view of a split-lock structure chainring in the prior art;

[0021] Figure 3 It is an exploded schematic view of the present invention;

[0022] Figure 4 It is a cross-sectional schematic view of the present invention.

[0023] Explanation of reference numerals:

[0024] 1. Crank; 11. Crank claw; 12. Mounting hole; 2. First tooth piece; 3. Second tooth piece; 4. Tooth piece hole; 5. Protection disc;

[0025] 51. Mounting groove; 6. Locking assembly; 61. Screw; 611. Outer edge; 62. Nut; 621. Step structure. Detailed implementation manners

[0026] In order to make the technical means, creative features, achieved purposes and functions realized by the present invention easy to understand, the following embodiments will specifically describe the present invention in conjunction with the accompanying drawings.

[0027] Embodiment

[0028] Figure 3 It is an exploded schematic view of the present invention, Figure 4 It is a cross-sectional schematic view of the present invention.

[0029] As Figure 3 and Figure 4 shown, this embodiment provides a chainring assembly with a non-slip tooth protection disc 5 structure, including: a crank 1, a first tooth piece 2, a second tooth piece 3, a protection disc 5 and a plurality of locking assemblies 6.

[0030] In this embodiment, one end of the crank 1 is provided with a mounting hole 12 connected to the shaft core, and a plurality of crank claws 11 are arranged on the outer periphery of one end of the crank 1, and each crank claw 11 is provided with a mounting hole 12. Among them, the mounting hole 12 is a through-hole structure.

[0031] In this embodiment, a plurality of tooth piece holes 4 are provided on both the first tooth piece 2 and the second tooth piece 3, and each tooth piece hole 4 corresponds to a mounting hole 12. Among them, the tooth piece hole 4 is also a through-hole structure, and the diameter of the tooth piece hole 4 is equal to the diameter of the mounting hole 12.

[0032] In this embodiment, a plurality of mounting grooves 51 are provided on the end face of the protection disc 5 facing the crank 1, and each mounting groove 51 also corresponds to a mounting hole 12. Among them, the protection disc 5 is preferably a protection disc 5 made of plastic material.

[0033] In this embodiment, each locking assembly 6 includes a screw 61 and a nut 62. The screw 61 has a rod portion, and an external thread is provided on the outer wall of the rod portion. The nut 62 is columnar and is disposed in an installation groove 51. A groove is axially formed inside the nut 62, and the notch of the groove is located on the end face of the nut 62 facing the crank 1. Internal threads meshing with the external threads are provided on the inner wall of the groove. Each nut 62 corresponds to an installation groove 51.

[0034] In this embodiment, the screw 61 has an outer edge 611 protruding outward from the rod portion. During use, the outer edge 611 of the screw 61 can prevent external rainwater and dust from entering the locking part of the screw 61 and the nut 62, thereby improving the use effect of the present utility model and extending the service life.

[0035] In this embodiment, the diameter of the groove is larger than the diameter of the tooth piece hole 4, and the nut 62 has a stepped structure 621 that cooperates with the installation hole 12 and the tooth piece hole 4. During use, the stepped structure 621 of the nut 62 can abut against the second tooth piece 3, thereby further ensuring the stability of the present utility model during use.

[0036] In this embodiment, the diameter of the nut 62 is not less than the diameter of the installation groove 51. During use, it can ensure that the nut 62 is stably disposed in the corresponding installation groove 51.

[0037] In this embodiment, the protection disk 5 can not only fix the nut 62 through the installation groove 51, but also place the nut 62 on the protection disk 5 during the injection molding process of the protection disk 5, so that the nut 62 and the protection disk 5 are injection molded into one body, further ensuring the tightness of the connection between the nut 62 and the protection disk 5.

[0038] During use, each nut 62 passes through the tooth piece hole 4 on the second tooth piece 3 and the installation hole 12 on the crank claw 11 in sequence, and then is located in the tooth piece hole 4 on the first tooth piece 2, so that the protection disk 5 and the second tooth piece 3 are fixed on one side of the crank 1. The rod portion of each screw 61 passes through the tooth piece hole 4 on the first tooth piece 2 and enters the groove in the nut 62 and locks with it, so that the first tooth piece 2 is fixed on the other side of the crank 1.

[0039] Functions and effects of the embodiment

[0040] According to the chainring assembly with an anti-slip tooth protection disk structure involved in the present utility model, it aims to fix the nut on the end face of the protection disk facing the crank, and the locking part of the screw and the nut is located inside the nut, so as to avoid the nut being exposed outside, and at the same time, it can also prevent the locking part of the screw and the nut from being eroded by water and dust, thereby ensuring the use effect and service life of the present utility model and providing safety protection for cyclists.

[0041] In addition, by fixedly installing the nut in the installation groove on the end face of the protection disc, it is possible to avoid the situation of slipping teeth or loose locking when fixing the tooth piece and the protection disc on the crank. Therefore, the protection disc will not be replaced due to slipping, nor will it become loose after long-term use. Thus, after using the present utility model, there will be no situation of wasting materials and increasing costs, and the stability after long-term use can be ensured.

[0042] The above embodiments are preferred cases of the present utility model and are not used to limit the protection scope of the present utility model.

Claims

1. A chainring assembly with an anti-slip tooth protection disc structure, characterized in that, Including: A crank, a first toothed plate, a second toothed plate, a protective disc, and a plurality of locking components, One end of the crank is provided with a mounting hole connected to the shaft core, and a plurality of crank claws are arranged on the outer periphery of one end of the crank. Each crank claw is provided with a mounting hole, A plurality of toothed plate holes are provided on both the first toothed plate and the second toothed plate, and each toothed plate hole corresponds to one of the mounting holes, A plurality of mounting grooves are provided on the end face of the protective disc facing the crank, and each mounting groove also corresponds to one of the mounting holes, Each locking component includes a screw and a nut. The screw has a rod portion, and an external thread is provided on the outer wall of the rod portion. The nut is columnar and is arranged in one of the mounting grooves. A groove is axially provided inside the nut, and the notch of the groove is located on the end face of the nut facing the crank. Internal threads meshing with the external thread are provided on the inner wall of the groove, Wherein, each nut sequentially passes through the toothed plate hole on the second toothed plate and the mounting hole on the crank claw and is located in the toothed plate hole on the first toothed plate, so that the protective disc and the second toothed plate are fixed on one side of the crank. The rod portion of each screw passes through the toothed plate hole on the first toothed plate and enters the groove on the nut and locks with it, so that the first toothed plate is fixed on the other side of the crank.

2. The chainring assembly with an anti-slip tooth protective disc structure according to claim 1, characterized in that: Among them, The protective disc is a protective disc made of plastic material.

3. The chainring assembly with an anti-slip tooth protective disc structure according to claim 1, characterized in that: Among them, One nut is fixedly arranged in each mounting groove. ​ Among them, ​ ​ Among them, ​

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