Crank chain wheel support

Abstract

The utility model belongs to the technical field of bicycles, and particularly relates to a crank chain wheel support which comprises a connecting shaft, a square shaft and a chain wheel and further comprises a crank body installed on the surface of the chain wheel through a connecting bolt, a containing groove and a positioning groove are formed in the crank body, the crank body is connected with the surface of a cover plate, and the cover plate is connected with the square shaft. A clamping block is further arranged on one side of the cover plate, the clamping block is connected to the surface of the containing groove, the position where the connecting bolt is located can be in a closed state under the connecting effect of the crank body and the cover plate, when the connecting bolt is loosened, the connecting bolt makes contact with the cover plate, and therefore the connecting bolt and the cover plate are not prone to loosening. Further separation between the connecting bolt and the crank body is prevented, the situation that the connecting bolt and the crank body are completely loosened or even lost can be avoided, and the follow-up mounting and maintenance effects on the connecting bolt are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, specifically relating to a crank chain wheel bracket. Background Technology

[0002] A bicycle is a small, two-wheeled land vehicle that is powered by pedaling. It is a green and environmentally friendly mode of transportation. There are many types of bicycles, including single bicycles, tandem bicycles, and multi-person bicycles. They can be used as an environmentally friendly means of transportation for getting around. More and more people are using bicycles as fitness equipment for cycling exercise and cycling tours. Bicycles are also a competitive sport, including road cycling races, mountain biking races, track cycling races, and stunt cycling races.

[0003] According to announcement number CN209225335U, a novel crank sprocket bracket is disclosed. This technology discloses "a sprocket, a shaft, and a connecting shaft. The sprocket is located on one side of the shaft, with a fixing hole at the center of one side. Multiple through holes are evenly distributed around the fixing hole on one side of the sprocket. A first fixing plate is fixed to the outside of the shaft, with one side of the first fixing plate fitting against one side of the sprocket. A first crank is fixed to the outer wall of the shaft. A connecting hole is located at one end of the shaft near the sprocket. The connecting shaft is located on the other side of the sprocket, with one end extending through the fixing hole into the interior of the connecting hole. This utility model has a reasonable structure, ingenious design, and simple operation, solving the problems of easy loosening and complicated assembly of crank sprockets in the prior art, and is easy to promote and use."

[0004] Although this design solves the problems of easy loosening of crank sprockets and complicated assembly in existing technologies, making it easy to promote and use, bicycles inevitably experience bumps and vibrations during use. After a long period of use, the connecting bolts that play a connecting role will loosen, or even fall off the frame or be lost, thus affecting the subsequent use.

[0005] To address the aforementioned problems, this application proposes a crank sprocket bracket. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a crank sprocket bracket. The connection between the crank body and the cover plate ensures a closed position for the connecting bolts. If the connecting bolts become loose, they will contact the cover plate, preventing further separation between the bolts and the crank body. This avoids complete detachment or even loss of the connecting bolts from the crank body, facilitating subsequent installation and maintenance of the connecting bolts.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a crank sprocket bracket, including a connecting shaft, a square shaft and a chainring, and a crank body mounted on the surface of the chainring by connecting bolts. The crank body has a placement groove and a positioning groove inside. The crank body is connected to the surface of a cover plate. A locking block is also provided on one side of the cover plate, and the locking block is connected to the surface of the placement groove.

[0008] As a preferred embodiment of the crank sprocket bracket of this utility model, a square shaft is fixedly installed on the surface of the connecting shaft. The square shaft passes through the chainring and the crank body and is threadedly connected to the connecting bolt. The connecting bolt is in close contact with the inner surface of the crank body.

[0009] As a preferred embodiment of the crank sprocket bracket of this utility model, the surfaces of the crank chain and the crank body are provided with rectangular through holes that match the square shaft.

[0010] As a preferred embodiment of the crank sprocket bracket of this utility model, the surface of the crank body is provided with the placement groove and the positioning groove at equal angles, the included angle between the positioning groove and the placement groove is 45 degrees, the placement groove is open, and the depth of the positioning groove is half of the placement groove.

[0011] As a preferred embodiment of the crank sprocket bracket of this utility model, a spring is also provided on the outer side of the positioning groove. One end of the spring is fixedly connected to the crank body, and the other end of the spring is connected to the surface of the cover plate. The cover plate is rotatably mounted on the surface of the crank body. A locking block is also integrally formed on the outer side of the cover plate, and the locking block is slidably connected to the placement groove and the positioning groove.

[0012] As a preferred embodiment of the crank sprocket bracket of this utility model, the position and shape of the locking block match the placement groove and the positioning groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the connection between the crank body and the cover plate can make the position of the connecting bolt in a closed state. When the connecting bolt becomes loose, the connecting bolt will come into contact with the cover plate, thereby preventing the connecting bolt and the crank body from separating further. This can prevent the connecting bolt and the crank body from becoming completely loose or even lost, which is beneficial for the subsequent installation and maintenance of the connecting bolt. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the crank body and cover plate structure in this utility model;

[0017] Figure 3 This is a schematic diagram of the crank body and cover plate in their separated state in this utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the crank body in this utility model;

[0019] In the picture:

[0020] 1. Connecting shaft; 2. Square shaft; 3. Crankset; 4. Crank body; 5. Connecting bolt; 6. Placement slot; 7. Positioning slot; 8. Spring; 9. Cover plate; 10. Locking block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] like Figure 1 As shown:

[0024] A crank sprocket support includes a connecting shaft 1.

[0025] In this implementation plan: The existing announcement number CN209225335U discloses a new type of crank sprocket bracket. This patent discloses a sprocket. The chainring 3 in this application adopts the same technical means as the prior art. The technical means will not be described in detail here. For details on the improvement of the prior art, please refer to the disclosed technology below. In order to solve the technical problems existing in the prior art, such as the "When a bicycle is in use, it is inevitable that there will be bumps and vibrations. After a long period of use, the connecting bolts 5 that play a connecting role will become loose, or even fall off the bicycle body or be lost, thus affecting the subsequent use effect." In terms of use, this problem is obviously a real and difficult problem to solve. In view of this, in order to solve the above problems, a crank body 4 and a cover plate 9 are added on the basis.

[0026] Furthermore:

[0027] like Figure 1 - Figure 4 As shown:

[0028] In conjunction with the above, it also includes a crank body 4 that is mounted on the surface of the chainring 3 by connecting bolts 5. The crank body 4 has a placement groove 6 and a positioning groove 7 inside. The crank body 4 is connected to the surface of the cover plate 9. A locking block 10 is also provided on one side of the cover plate 9 and the locking block 10 is connected to the surface of the placement groove 6.

[0029] In this implementation scheme: the connection between the crank body 4 and the cover plate 9 can keep the position of the connecting bolt 5 in a closed state. When the connecting bolt 5 becomes loose, the connecting bolt 5 will come into contact with the cover plate 9, thereby preventing the connecting bolt 5 and the crank body 4 from separating further. This can prevent the connecting bolt 5 and the crank body 4 from becoming completely loose or even lost, which is beneficial for the subsequent installation and maintenance of the connecting bolt 5.

[0030] Furthermore:

[0031] In an optional embodiment, a square shaft 2 is fixedly mounted on the surface of the connecting shaft 1. The square shaft 2 passes through the crank sprocket 3 and the crank body 4 and is threadedly connected to the connecting bolt 5. The connecting bolt 5 and the inner surface of the crank body 4 are in contact with each other.

[0032] In this embodiment, the connection between the connecting shaft 1, the square shaft 2, and the chainring 3 enables the chainring 3 to stably drive the bicycle during rotation, thereby achieving the driving effect of the vehicle.

[0033] Furthermore:

[0034] In an optional embodiment, the surfaces of the crank sprocket 3 and the crank body 4 are provided with rectangular through holes that match the square shaft 2.

[0035] In this embodiment, the holes on the surfaces of the crank sprocket 3 and the crank body 4 enable an effective connection between them, the square shaft 2, and the connecting shaft 1, ensuring a stable connection.

[0036] Furthermore:

[0037] In an optional embodiment, the surface of the crank body 4 is provided with a placement groove 6 and a positioning groove 7 at equal angles. The included angle between the positioning groove 7 and the placement groove 6 is 45 degrees, and the placement groove 6 is open. The depth of the positioning groove 7 is half that of the placement groove 6.

[0038] In this embodiment, the placement groove 6 and positioning groove 7, which are set at equal angles, can form a tighter connection with the cover plate 9 and the locking block 10, making the working state of the cover plate 9 and the locking block 10 more stable.

[0039] Furthermore:

[0040] In an optional embodiment, a spring 8 is also provided on the outer side of the positioning groove 7. One end of the spring 8 is fixedly connected to the crank body 4, and the other end of the spring 8 is connected to the surface of the cover plate 9. The cover plate 9 is rotatably mounted on the surface of the crank body 4. A locking block 10 is integrally formed on the outer side of the cover plate 9, and the locking block 10 is slidably connected to the placement groove 6 and the positioning groove 7.

[0041] In this embodiment, the placement groove 6 and the positioning groove 7 can form a stable sealing effect between the cover plate 9, the locking block 10 and the crank body 4, thereby enabling the crank body 4 to achieve a stable connection with the connecting bolt 5 and preventing the crank body 4 and the connecting bolt 5 from falling off.

[0042] Furthermore:

[0043] In an optional embodiment, the position and shape of the card block 10 match the placement slot 6 and the positioning slot 7.

[0044] In this embodiment, the locking block 10, which matches the placement slot 6 and the positioning slot 7, can achieve the connection between the crank body 4 and the crank body 4, and can also block the crank body 4. This can prevent the connecting bolt 5 from falling off and separating from the crank body 4, and can provide some convenience for subsequent maintenance and installation work.

[0045] The working principle and usage process of this utility model are as follows: When installing the chainring 3 and crank body 4, the chainring 3 and crank body 4 can be sleeved on the surface of the square shaft 2. At this time, the square shaft 2 and crank body 4 can be connected and fastened by the connecting bolt 5. However, when using the chainring 3 and crank body 4, the connecting bolt 5 may fall off the square shaft 2 and crank body 4. At this time, the cover plate 9 can be connected to the crank body 4, and the locking block 10 can be aligned with the position of the placement groove 6 and the cover plate 9 can be pressed. The spring 8 is compressed and the locking block 10 is slid along the placement groove 6 into the inside of the crank body 4. When the locking block 10 is separated from the placement groove 6, the locking block 10 and the cover plate 9 can be rotated 45 degrees. At this time, the locking block 10 will correspond to the positioning groove 7, and the spring 8 will push the locking block 10 into the positioning groove 7, thereby achieving the sealing effect of the crank body 4. At this time, the connecting bolt 5 will not fall off the crank body 4 and will not be lost.

[0046] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crank sprocket support, comprising a connecting shaft (1), a square shaft (2), and a crank chainring (3), characterized in that: It also includes a crank body (4) mounted on the surface of the chainring (3) by connecting bolts (5), the inside of the crank body (4) is provided with a placement groove (6) and a positioning groove (7), the surface of the crank body (4) is connected to the cover plate (9), and a locking block (10) is provided on one side of the cover plate (9), and the locking block (10) is connected to the surface of the placement groove (6).

2. The crank sprocket bracket according to claim 1, characterized in that: A square shaft (2) is fixedly installed on the surface of the connecting shaft (1). The square shaft (2) passes through the crank (3) and the crank body (4) and is threadedly connected to the connecting bolt (5). The connecting bolt (5) and the inner surface of the crank body (4) are in contact with each other.

3. The crank sprocket bracket according to claim 2, characterized in that: The surfaces of the crank (3) and the crank body (4) are provided with rectangular through holes that match the square shaft (2).

4. The crank sprocket bracket according to claim 3, characterized in that: The crank body (4) has the placement groove (6) and the positioning groove (7) equally spaced on its surface. The angle between the positioning groove (7) and the placement groove (6) is 45 degrees, and the placement groove (6) is open. The depth of the positioning groove (7) is half that of the placement groove (6).

5. The crank sprocket bracket according to claim 4, characterized in that: A spring (8) is also provided on the outside of the positioning groove (7). One end of the spring (8) is fixedly connected to the crank body (4), and the other end of the spring (8) is connected to the surface of the cover plate (9). The cover plate (9) is rotatably mounted on the surface of the crank body (4). A locking block (10) is integrally formed on the outside of the cover plate (9), and the locking block (10) is slidably connected to the placement groove (6) and the positioning groove (7).

6. The crank sprocket bracket according to claim 5, characterized in that: The position and shape of the card block (10) match the placement slot (6) and the positioning slot (7).

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