CN217730686U - Lightweight locking structure chain wheel - Google Patents
Lightweight locking structure chain wheel Download PDFInfo
- Publication number
- CN217730686U CN217730686U CN202221893080.4U CN202221893080U CN217730686U CN 217730686 U CN217730686 U CN 217730686U CN 202221893080 U CN202221893080 U CN 202221893080U CN 217730686 U CN217730686 U CN 217730686U
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- China
- Prior art keywords
- head end
- axle center
- pair
- chain wheel
- crank
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Abstract
The utility model discloses a lightweight locking structure chain wheel, including left crank, right crank, axle center, tooth piece and frame five-way pipe, left side articulate head end be provided with the first mounting hole of one end complex in axle center, the lateral part of mounting hole is provided with a movement joint, be provided with a pair of passing on the articulate head end of a left side the locking screw hole of movement joint, a pair of locking screw hole along the radial parallel distribution in axle center, moreover the axis of a pair of locking screw hole is in on the same radial section in axle center, and each locking screw hole passes with one the screw cooperation of movement joint, the articulate head end of the right side be provided with the other end complex second mounting hole in axle center, the articulate head end of the right side with the middle part of tooth piece is connected, frame five-way pipe cover is established epaxial.
Description
Technical Field
The utility model relates to a bicycle accessory technical field, concretely relates to lightweight locking structure chain wheel.
Background
Referring to fig. 1 and 2, the left crank structure in the conventional structural fluted disc has the following problems in design:
1. in order to ensure the hole distance of the pair of locking screw holes 1a and 1b, the design height L1 of the head of the left crank 1 is higher than the design height L2 of the matched shaft center, which results in the increase of the weight of the product;
2. the design height L1 of the head of the left crank 1 is higher than the design height L2 of the matching shaft center, so that the design attractiveness of the whole crank is influenced;
3. because the design height L1 of the head of the left crank 1 is higher than the design height L2 of the matching shaft center, the product is not polished well when being polished, and the surface quality is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a lightweight locking structure chain wheel to the aforesaid of prior art not enough and defect to solve above-mentioned problem.
The utility model provides a technical problem can adopt following technical scheme to realize:
the utility model provides a lightweight locking structure chain wheel, includes left crank, right crank, axle center, flight and frame five-way pipe, left side crank's head end be provided with the first mounting hole of one end complex in axle center, the lateral part of first mounting hole is provided with a movement joint, be provided with a pair of passing on left side crank's the head end the locking screw hole of movement joint, a pair of locking screw hole along the radial parallel distribution in axle center, moreover the axis of a pair of locking screw hole is in on the same radial section in axle center, and each locking screw hole passes with one the screw cooperation of movement joint, right side crank's head end be provided with the other end complex second mounting hole in axle center, right side crank's head end with the middle part of flight is connected, the frame five-way pipe cover is established on the axle center.
In a preferred embodiment of the present invention, the pair of locking screw holes are countersunk screw holes, and the heads of the pair of countersunk screw holes are respectively disposed at both sides of the head end width direction of the left crank.
In a preferred embodiment of the present invention, an inner spline is disposed in the first mounting hole, and an outer spline engaged with the inner spline is disposed at one end of the shaft center.
In a preferred embodiment of the present invention, the head end of the right crank is riveted to the other end of the shaft.
In a preferred embodiment of the present invention, a weight reduction groove is disposed on a side of the left crank away from the axle center.
In a preferred embodiment of the present invention, a weight reduction inclined plane is disposed on a side of the head end of the left crank away from the shaft center.
In a preferred embodiment of the present invention, an inner wall of an end of the axle close to the left crank is provided with an internal thread structure, and the left crank is provided with a locking bolt matched with the internal thread structure.
Since the technical scheme as above is adopted, the beneficial effects of the utility model reside in that: the utility model discloses a pair of locking screw hole is along the radial parallel distribution in axle center, and the axis of a pair of locking screw hole is in on the same radial section in axle center moreover, has reduced the axial width of left crank head end, reduces the weight of product, because of a pair of locking screw hole adopts along the axle center radially parallel distribution makes left articulate head design height the same with cooperation axle center design height, has increased holistic design pleasing to the eye. In addition, the design height of the head of the left crank is the same as that of the matching shaft center, so that the grinding is better performed in the grinding process, and the quality of a product can be better ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of a prior art left crank.
Fig. 2 is a schematic view of a prior art left crank.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is an exploded view of the present invention.
Fig. 5 is an assembly view of the present invention.
Fig. 6 is a left side view of the left crank of the present invention.
Fig. 7 is a left side view of the left crank of the present invention after being processed.
Fig. 8 is a right side view of the left crank of the present invention.
Fig. 9 is a right side view of the left crank of the present invention after being processed.
Fig. 10 is a front view of the left crank of the present invention.
Detailed Description
In order to make the utility model realize the technical means, creation characteristics, achievement purpose and efficiency are easy to understand and understand, the utility model is further explained below.
Referring to fig. 3 to 10, the lightweight locking structure chain wheel includes a left crank 100, a right crank 200, a shaft 300, a tooth piece 400 and a frame five-way tube 500.
Each locking screw hole 120 is matched with a screw 1 penetrating through the deformation joint 111, a second mounting hole 210 matched with the other end of the shaft center 300 is formed in the head end 200a of the right crank 200, the head end 200a of the right crank 200 is connected with the middle of the tooth piece 400, and the frame five-way pipe 500 is sleeved on the shaft center 300. In this embodiment, the head end 200a of the right crank 200 is riveted to the other end of the shaft 300.
A pair of locking screw hole 120 is countersunk screw hole, and the head of a pair of countersunk screw hole is arranged respectively in the both sides of left crank 100's head end 100a width direction, makes the head of a pair of countersunk screw hole can misplace, can not increase the radial pitch-row of a pair of locking screw hole, and then can not increase the radial width of left crank head end, so can not increase chain wheel weight, guarantee the chain wheel lightweight. Specifically, the pair of countersunk head screw holes are a first countersunk head screw hole and a second countersunk head screw hole, and the heads of the first countersunk head screw hole and the second countersunk head screw hole are respectively arranged on the left side and the right side of the head end width direction of the left crank, or the heads of the first countersunk head screw hole and the second countersunk head screw hole are respectively arranged on the right side and the left side of the head end width direction of the left crank.
An inner spline 110a is provided in the first mounting hole 110, and an outer spline 300a engaged with the inner spline 110a is provided at one end of the shaft core 300. When assembling, the left crank 100 is sleeved on one end of the shaft center 300 through the first mounting hole 110, and is connected with the external spline 300a at one end of the shaft center 300 through the internal spline 110a in the first mounting hole 110.
The side of the left crank 100 away from the axle 300 is provided with a lightening groove 130. The weight of the chain wheel can be reduced through the design of the weight reduction groove 130, and the weight reduction of the chain wheel is guaranteed.
The weight-reducing inclined plane 140 is arranged on the side, away from the axle center 300, of the head end 100a of the left crank 100, the design height L3 of the head of the left crank 100 and the design height L4 of the matched axle center are not changed, and the weight of the chain wheel can be further reduced.
The inner wall of the end of the axle 300 close to the left crank 100 is provided with an internal thread structure, and the left crank 100 is provided with a locking bolt 150 matched with the internal thread structure. When the left crank 100 is assembled to one end of the shaft 300, the locking bolt 150 is connected to the internal thread structure of one end of the shaft 300 by screw-fitting.
The utility model discloses an assembly process as follows:
firstly, the right crank 200 is arranged in the middle of the tooth plate 400, the right crank 200 is riveted on the other end of the shaft center 300, then the frame five-way pipe 500 is sleeved on the shaft center 300, finally the first mounting hole 110 of the left crank 100 is arranged on one end of the shaft center 300, an internal spline 110a of the first mounting hole 110 is matched with an external spline 300a at one end of the shaft center 300, a locking bolt 150 is adopted to be assembled on an internal thread structure on the inner wall at one end of the shaft center 300, and finally a screw 1 is adopted to penetrate through a deformation joint 111 to be matched with each locking screw hole 120.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a lightweight locking structure chain wheel, includes left crank, right crank, axle center, tooth piece and frame five-way pipe, its characterized in that, left side articulate head end be provided with the first mounting hole of one end complex in axle center, the lateral part of mounting hole is provided with a movement joint, be provided with a pair of passing on the articulate head end of a left side the locking screw hole of movement joint, a pair of locking screw hole along the radial parallel distribution in axle center, moreover the axis of a pair of locking screw hole is on the same radial section in axle center, and each locking screw hole passes with one the screw cooperation of movement joint, the articulate head end of a right side be provided with the other end complex second mounting hole in axle center, the articulate head end of a right side with the middle part of tooth piece is connected, the frame five-way pipe cover is established on the axle center.
2. The lightweight locking structure crankset as set forth in claim 1, wherein the pair of locking screw holes are countersunk screw holes, and heads of the pair of countersunk screw holes are respectively disposed at both sides in a width direction of a head end of the left crank.
3. The lightweight locking structure chain wheel as set forth in claim 1, wherein an internal spline is provided in said first mounting hole, and an external spline engaged with said internal spline is provided at one end of said axial center.
4. The lightweight locking structure chain wheel as set forth in claim 1, wherein said head end of said right crank is riveted to the other end of said axial center.
5. The lightweight locking structure chain wheel as claimed in claim 1, wherein a weight reduction groove is formed in a side of the left crank remote from the shaft center.
6. The lightweight locking structure chain wheel as claimed in claim 1, wherein a weight reduction slope is provided on a side of the head end of the left crank away from the shaft center.
7. The lightweight locking structure chain wheel as claimed in claim 1, wherein an inner wall of the shaft center near the left crank is provided with an internal thread structure, and the left crank is provided with a locking bolt matched with the internal thread structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221893080.4U CN217730686U (en) | 2022-07-21 | 2022-07-21 | Lightweight locking structure chain wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221893080.4U CN217730686U (en) | 2022-07-21 | 2022-07-21 | Lightweight locking structure chain wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217730686U true CN217730686U (en) | 2022-11-04 |
Family
ID=83849456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221893080.4U Active CN217730686U (en) | 2022-07-21 | 2022-07-21 | Lightweight locking structure chain wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217730686U (en) |
-
2022
- 2022-07-21 CN CN202221893080.4U patent/CN217730686U/en active Active
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