Motorcycle large chain wheel mounting structure
By designing a self-positioning conical surface and screw hole on the motorcycle's large sprocket, the problems of nut space occupation and high processing difficulty are solved, achieving a fastening effect while saving space.
Patent Information
- Application Number
- CN202520430923.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-12
AI Technical Summary
The existing method of installing large motorcycle sprockets requires nuts to occupy a lot of space, and the positioning structure is difficult to process.
It adopts a self-positioning conical surface and screw hole design, and is directly connected to the bracket by bolts, eliminating the need for nuts.
This design achieves a secure connection between the sprocket and the bracket, saving space and simplifying the manufacturing process.
Smart Images
Figure CN223721089U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motorcycle accessory technical field, concretely relates to a motorcycle big sprocket mounting structure. BACKGROUND
[0002] Motorcycle power transmission mainly adopts chain transmission mode, and the main driven sprocket connected with the output shaft of the engine is also called small sprocket, drives the driven sprocket through the chain, and the big sprocket is connected with the driving hub of the motorcycle through the one-way clutch, so that the power transmission of the motorcycle is realized.
[0003] The mounting hole on the conventional big sprocket is in the form of a common via, a positioning bolt with a positioning light rod is passed through the big sprocket and the big sprocket support, and then a nut is used to fix in a tight manner, but the existing big sprocket structure mounting mode locking needs more space for the nut, and the positioning structure is matched with the positioning light rod on the positioning bolt, the positioning hole on the big sprocket via and the big sprocket support, so that the machining difficulty is high. UTILITY MODEL CONTENTS
[0004] In view of the defects of the prior art, the utility model provides a motorcycle big sprocket mounting structure which has the advantages of self-positioning and nut saving, and solves the above problems.
[0005] In order to realize the above-mentioned self-positioning and nut saving purposes, the utility model provides the following technical scheme: a motorcycle big sprocket mounting structure, comprising a sprocket piece and a support, a plurality of convex parts are fixedly installed on the inner wall of the sprocket piece, a through hole is formed in the surface of the convex part, a tapered surface part is arranged at the opening end of the through hole, and a bolt is inserted into the through hole.
[0006] A plurality of convex pieces are fixedly installed on the outer wall of the support, a screw hole is formed in the surface of the convex piece, and a connecting hole is formed in the center of the support.
[0007] Preferably, the head of the bolt is provided with a tangent surface part opposite to the tapered surface part.
[0008] Preferably, the sprocket piece is detachably installed with the support through the bolt and the screw hole.
[0009] Preferably, a reduced hole is formed in the surface of the sprocket piece and the support.
[0010] Preferably, the center of the support and the sprocket piece are matched with each other.
[0011] Compared with the prior art, the utility model provides a motorcycle big sprocket mounting structure, which has the following beneficial effects:
[0012] The motorcycle sprocket mounting structure changes the matching surface of the sprocket part and the bolt into a taper surface part with a centering function to achieve the positioning effect, and directly changes the positioning hole on the traditional sprocket support into a threaded hole, so that the bolt is directly locked on the support during connection, and a separate tension nut is not needed, and more space can be saved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a front perspective structure schematic view of the utility model;
[0014] Figure 2 It is an exploded front structure schematic view of the utility model;
[0015] Figure 3 It is an exploded back structure schematic view of the utility model;
[0016] Figure 4 It is a structure schematic view of the sprocket part of the utility model;
[0017] Figure 5 It is a back structure schematic view of the utility model.
[0018] In the drawing: 1, sprocket part; 12, protruding part; 13, through hole; 14, taper surface part; 2, support; 21, protruding piece; 22, threaded hole; 23, connecting hole; 3, bolt. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Please refer to Figure 1 -5, a motorcycle sprocket mounting structure, including a sprocket part 1 and a support 2, the surface of the sprocket part 1 and the surface of the support 2 are both provided with a weight-reducing hole, which is used to reduce the weight of the two, and does not affect the strength of the two; the center of the support 2 and the center of the sprocket part 1 are matched with each other, so as to ensure that the two are matched with each other after being connected.
[0021] Please refer to Figure 1 -5, the sprocket part 1 is fixedly provided with a plurality of protruding parts 12 on the inner wall, the surface of the protruding part 12 is provided with a through hole 13, and the opening end of the through hole 13 is provided with a taper surface part 14.
[0022] Please refer toFigure 1 --5, the outer wall of the support 2 is fixedly provided with a plurality of protruding pieces 21, the protruding pieces 21 correspond to the positions of the protruding portions 12 and are adapted to each other; the surface of the protruding pieces 21 is provided with screw holes 22, the screw holes 22 correspond to the positions of the through holes 13 and are adapted to each other; the center of the support 2 is provided with a connecting hole 23, which is convenient for connecting with the wheel shaft.
[0023] Please refer to Figure 1 --5, the inside of the through hole 13 is inserted with a bolt 3; the head of the bolt 3 is provided with a tangent surface part opposite to the conical surface part 14, the bolt 3 is pulled tight after being inserted into the through hole 13, the tangent surface part and the conical surface part 14 are adapted to each other, so that the bolt 3 can be positioned; the sprocket 1 is detachably installed with the support 2 through the bolt 3 and the screw hole 22.
[0024] In use, the bolt 3 is inserted into the through hole 13, the head of the bolt 3 is automatically fitted into the conical surface part 14, then the bolt 3 is screwed with the screw hole 22 on the support 2, so as to realize the fastening between the sprocket 1 and the support 2, and then the use of the nut is saved.
[0025] In summary, the mating surface of the sprocket 1 and the bolt 3 is changed to the conical surface part 14 with the centering function to achieve the positioning effect, and the positioning hole on the traditional sprocket support is directly changed to the screw hole 22, when connected, the bolt 3 is directly locked on the support 2, without the need for a separate tension nut, which can save more space.
[0026] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A motorcycle sprocket mounting structure comprising a sprocket member (1) and a bracket (2), characterized by: A plurality of convex parts (12) are fixedly installed on the inner wall of the chain wheel piece (1), a through hole (13) is formed on the surface of the convex part (12), a tapered surface part (14) is arranged at the opening end of the through hole (13), and a bolt (3) is inserted into the through hole (13). A plurality of convex pieces (21) are fixedly installed on the outer wall of the support (2), a screw hole (22) is formed on the surface of the convex piece (21), and a connection hole (23) is formed at the center of the support (2).
2. A motorcycle sprocket mounting structure according to claim 1, characterized in that: The head of the bolt (3) is provided with a tangent surface part opposite to the tapered surface part (14).
3. The motorcycle sprocket mounting structure according to claim 1, characterized by: The chain wheel piece (1) is detachably installed with the support (2) through the bolt (3) and the screw hole (22).
4. The motorcycle sprocket mounting structure according to claim 1, characterized by: The surfaces of the chain wheel piece (1) and the support (2) are both provided with a reduction hole.
5. The motorcycle sprocket mounting structure according to claim 1, characterized by: The center of the support (2) is consistent with the center of the chain wheel piece (1).