Quick-release bicycle crank

Abstract

The utility model discloses a quick release type bicycle crank which comprises a crank body, a bearing and a pedal, a connecting shaft is arranged at the top end of the crank body, connecting grooves are formed in the surfaces of the two ends of the bearing, positioning shafts are arranged in the connecting grooves, and protruding block bodies are arranged on the surfaces of the two sides of the outer portion of each positioning shaft. Limiting bolts are arranged in the lower portion of the crank body and in the pedal, lubricating rings are arranged on the surfaces of one sides of the limiting bolts, positioning nuts are arranged on the surfaces of the outer ends of the limiting bolts, positioning rings are arranged on the surfaces of the two sides of the outer portion of the bearing, and positioning clamping strips are arranged on the surfaces of the peripheries of one sides of the positioning rings. By arranging the positioning shaft, the convex block bodies and the connecting grooves, the positioning shaft can be quickly separated from the interiors of the connecting grooves in the two sides of the outer portion of the bearing, the problem that the mounting and dismounting processes of the bicycle crank are relatively tedious is solved, certain time and skills needed are reduced, and the dismounting and replacing efficiency of the bicycle crank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a quick-release bicycle crank. Background Art

[0002] A bicycle, usually known as a bike or a pedal cycle, is a two-wheeled vehicle driven by a human through pedaling.

[0003] Traditional bicycle cranks are usually fixed to the bicycle bottom bracket through fastening screws and nuts. The installation and disassembly process of the bicycle crank is relatively cumbersome, requiring a certain amount of time and skills, which reduces the disassembly and replacement efficiency of the bicycle crank. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a quick-release bicycle crank, which can solve the problem that traditional bicycle cranks are usually fixed to the bicycle bottom bracket through fastening screws and nuts, and the installation and disassembly process of the bicycle crank is relatively cumbersome, reduce the need for a certain amount of time and skills, and improve the disassembly and replacement efficiency of the bicycle crank.

[0005] To achieve the above purpose, a quick-release bicycle crank is provided, including a crank body, a bearing and a pedal. A connecting shaft is arranged at the top end of the crank body. Connecting grooves are arranged on the surfaces of both ends of the bearing. A positioning shaft is arranged inside the connecting groove. Convex blocks are arranged on the outer surfaces of both sides of the positioning shaft. Limiting bolts are arranged inside the lower part of the crank body and inside the pedal. A lubricating ring is arranged on one side surface of the limiting bolt. A positioning nut is arranged on the outer end surface of the limiting bolt. Positioning rings are arranged on the outer surfaces of both sides of the bearing. Positioning strips are arranged on the peripheral surfaces of one side of the positioning ring. Connecting grooves are arranged on the peripheral surfaces of one side of the connecting shaft.

[0006] According to the quick-release bicycle crank, the top end of the crank body is fixedly and contact-connected with the connecting shaft, and the surfaces of both ends of the bearing are recessed and connected with the connecting grooves in an embedded manner.

[0007] According to the quick-release bicycle crank, the positioning shaft is fixedly connected through the internal thread of the connecting groove and is in contact with the outer surface of the connecting shaft, both sides of the outside of the positioning shaft are fixedly and contact-connected with the convex blocks, and the connecting shaft forms a positioning contact state with the outer surface of the bearing through the positioning shaft and the connecting groove.

[0008] According to the quick-release bicycle crank, the limiting bolts are respectively connected with the inside of the lower part of the crank body and the inside of the pedal in a limiting and movable manner, and the pedal forms a supporting contact state with the lower side of the crank body through the limiting bolts.

[0009] According to the described quick-release bicycle crank, the lubricating ring is in snap-fit contact connection with the surface of the limiting bolt between the crank body and the pedal, the positioning nut is fixedly connected to the outer surface of the limiting bolt, and the pedal forms a fixed support state with one side of the crank body through the limiting bolt and the positioning nut.

[0010] According to the described quick-release bicycle crank, the positioning ring is fixedly in contact connection with both sides of the outside of the bearing, and the positioning ring is in contact with one side surface of the connecting shaft.

[0011] According to the described quick-release bicycle crank, the peripheral surface of one side of the positioning ring is fixedly in contact connection with the positioning card strip, and the positioning card strip is of a hexagonal structure.

[0012] According to the described quick-release bicycle crank, the peripheral surface of one side of the connecting shaft is in interference fit recessed connection with the connecting card slot. The connecting card slot is of a hexagonal structure, and the connecting shaft forms a positioning contact state with one side of the positioning ring through the positioning engagement connection between the connecting card slot and the positioning card strip.

[0013] The beneficial effects of the above solution are as follows:

[0014] 1. By providing the positioning shaft, the convex block body and the connecting slot, the positioning shaft can be quickly connected to the inside of the connecting slots on both sides of the outside of the bearing to improve the detachment state, reduce the relatively cumbersome problems in the installation and disassembly process of the bicycle crank, and reduce the need for certain time and skills, thereby improving the disassembly and replacement efficiency of the bicycle crank.

[0015] 2. By providing the positioning ring, the positioning card strip and the connecting card slot, the connecting shaft at the top of the crank body can be fixed to both sides of the outside of the bearing, enabling the cranks on both sides of the bicycle to maintain opposite and fixed distances during movement.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a quick-release bicycle crank of the present utility model;

[0018] Figure 2 It is a structural sectional view of a quick-release bicycle crank of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of a bearing of a quick-release bicycle crank of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of a crank body of a quick-release bicycle crank of the present utility model.

[0021] Legend Explanation:

[0022] 1. Crank body; 2. Connecting shaft; 3. Positioning ring; 4. Bearing; 5. Pedal; 6. Positioning shaft; 7. Positioning strip; 8. Connecting slot; 9. Bump body; 10. Limit bolt; 11. Lubricating ring; 12. Positioning nut; 13. Connecting groove. Detailed Implementation Manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Refer to Figures 1-4 , an embodiment of a quick-release bicycle crank of the present invention includes a crank body 1, a bearing 4, and a pedal 5. A connecting shaft 2 is provided at the top end of the crank body 1. Connecting grooves 13 are provided on both surfaces at both ends of the bearing 4. A positioning shaft 6 is provided inside the connecting groove 13. Bump bodies 9 are provided on both outer surfaces of the positioning shaft 6. Limit bolts 10 are provided inside the lower part of the crank body 1 and inside the pedal 5. A lubricating ring 11 is provided on one surface of the limit bolt 10. A positioning nut 12 is provided on the outer end surface of the limit bolt 10. Positioning rings 3 are provided on both outer surfaces of the bearing 4. Positioning strips 7 are provided on the peripheral surfaces on one side of the positioning ring 3. Connecting slots 8 are provided on the peripheral surfaces on one side of the connecting shaft 2.

[0025] The top end of the crank body 1 is fixedly and contact-connected to the connecting shaft 2. Both ends of the bearing 4 are fitted and recessed into the connecting groove 13. By providing the bearing 4, a horizontal state can be provided for the crank body 1 and both sides of the bicycle. The positioning shaft 6 is fixedly connected through the internal thread of the connecting groove 13 and is in contact with the outer surface of the connecting shaft 2. Both outer sides of the positioning shaft 6 are fixedly and contact-connected to the bump body 9. The connecting shaft 2 forms a positioning contact state with the outer surface of the bearing 4 through the positioning shaft 6 and the connecting groove 13. By providing the bump body 9, the frictional property of the outer surface of the positioning shaft 6 can be increased, facilitating the threaded rotation of the positioning shaft 6. The limit bolts 10 are respectively in limit movable connection with the interior below the crank body 1 and the interior of the pedal 5. The pedal 5 forms a supporting contact state with one side below the crank body 1 through the limit bolts 10. By providing the limit bolts 10, the pedal 5 can be kept in a horizontally fixed state with the lower part of the crank body 1. The lubricating ring 11 is in snap-fit contact connection with the surface of the limit bolt 10 between the crank body 1 and the pedal 5. The positioning nut 12 is fixedly connected to the outer end surface of the limit bolt 10. The pedal 5 forms a fixed supporting state with one side of the crank body 1 through the limit bolt 10 and the positioning nut 12. By providing the lubricating ring 11, it can prevent the pedal 5 from directly contacting the lower surface of the crank body 1, avoiding an increase in friction between the pedal 5 and the crank body 1, accelerating the wear of the pedal 5, and affecting the riding efficiency and stability. The positioning ring 3 is fixedly and contact-connected to both outer sides of the bearing 4. The positioning ring 3 is in contact with one side surface of the connecting shaft 2. All around the one side surface of the positioning ring 3 are fixedly and contact-connected to the positioning strip 7. The positioning strip 7 is a hexagonal structure. All around the one side surface of the connecting shaft 2 are fitted and recessed into the connecting card slot 8. The connecting card slot 8 is a hexagonal structure. The connecting shaft 2 forms a positioning contact state with one side of the positioning ring 3 through the positioning snap-fit connection between the connecting card slot 8 and the positioning strip 7.

[0026] Working principle: When disassembling the bicycle crank, by rotating the positioning shaft 6 to disengage the positioning shaft 6 from the inside of the connecting groove 13, the crank body 1 can be disengaged from between the connecting shaft 2 and the bearing 4, so as to achieve the purpose of quick disassembly of the bicycle crank.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A quick-release bicycle crank, comprising a crank body (1), a bearing (4) and a pedal (5), characterized in that: A connecting shaft (2) is provided at the top end of the crank body (1). Connecting grooves (13) are provided on both end surfaces of the bearing (4). A positioning shaft (6) is provided inside the connecting groove (13). Protrusion blocks (9) are provided on both outer side surfaces of the positioning shaft (6). Limit bolts (10) are provided inside the lower part of the crank body (1) and inside the pedal (5). A lubricating ring (11) is provided on one side surface of the limit bolt (10). A positioning nut (12) is provided on the outer end surface of the limit bolt (10). Positioning rings (3) are provided on both outer side surfaces of the bearing (4). Positioning strips (7) are provided on the peripheral surface of one side of the positioning ring (3). Connecting card slots (8) are provided on the peripheral surface of one side of the connecting shaft (2).

2. The quick-release bicycle crank according to claim 1, wherein: The top end of the crank body (1) is fixedly and contact-connected to the connecting shaft (2). Both end surfaces of the bearing (4) are fitted and recessed-connected to the connecting groove (13).

3. The quick-release bicycle crank according to claim 2, wherein: The positioning shaft (6) is fixedly connected through the internal thread of the connecting groove (13) to form a contact state with the outer side surface of the connecting shaft (2). Both outer sides of the positioning shaft (6) are fixedly and contact-connected to the protrusion blocks (9). The connecting shaft (2) forms a positioning contact state with the outer side surface of the bearing (4) through the positioning shaft (6) and the connecting groove (13).

4. A quick-release bicycle crank according to claim 1, wherein: The limit bolts (10) are respectively connected in a limited and movable manner to the inside of the lower part of the crank body (1) and the inside of the pedal (5). The pedal (5) forms a support contact state with the lower side of the crank body (1) through the limit bolts (10).

5. A quick-release bicycle crank according to claim 4, wherein: The lubricating ring (11) is snap-fitted and contact-connected to the surface of the limit bolt (10) between the crank body (1) and the pedal (5). The positioning nut (12) is fixedly connected to the outer end surface of the limit bolt (10). The pedal (5) forms a fixed support state with one side of the crank body (1) through the limit bolt (10) and the positioning nut (12).

6. The quick-release bicycle crank according to claim 1, characterized in that: The positioning ring (3) is fixedly and contact-connected to both outer sides of the bearing (4). The positioning ring (3) forms a contact state with one side surface of the connecting shaft (2).

7. A quick-release bicycle crank according to claim 1, characterized in that: The peripheral surface of one side of the positioning ring (3) is fixedly and contact-connected to the positioning strips (7). The positioning strips (7) are of a hexagonal structure.

8. The quick-release bicycle crank according to claim 7, wherein: The peripheral surface of one side of the connecting shaft (2) is fitted and recessed-connected to the connecting card slots (8). The connecting card slots (8) are of a hexagonal structure. The connecting shaft (2) forms a positioning contact state with one side of the positioning ring (3) through the positioning snap-connection between the connecting card slots (8) and the positioning strips (7).

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