Bicycle crank convenient to replace

Abstract

The utility model belongs to the technical field of bicycles and discloses a bicycle crank convenient to replace, which comprises a chain wheel disc, a T-shaped fixing block is fixedly connected to the outer end of the chain wheel disc, a concave mounting block is slidably connected to the outer end of the T-shaped fixing block, and a crank is fixedly connected to the lower end of the concave mounting block. A T-shaped fixing block is arranged in the clamping groove, a sliding rod is connected to the inner wall of the T-shaped fixing block in a sliding mode, a spring is fixedly installed at the outer end of the sliding rod, one end of the spring and the inner wall of the T-shaped fixing block are fixedly installed, and a clamping block is fixedly connected to one end of the sliding rod. And on the contrary, under the action of a spring, a clamping block and a clamping groove are clamped, the concave mounting block and the T-shaped fixing block are quickly connected, and the crank can be quickly mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, and particularly relates to a bicycle crank which is convenient to replace. Background Art

[0002] The sprocket crank of a bicycle is an essential and important component in bicycle assemblies. With the increasing use of bicycles, people's requirements for bicycle sprocket cranks are also getting higher and higher.

[0003] As one of the essential components of a bicycle, the crank plays a crucial role. However, the current cranks are inconvenient to install. Usually, multiple screws are required to fix the crank to the bicycle gear, which is rather inconvenient. At the same time, the fixation and installation between the cranks themselves also need to be fixed by screws, making disassembly, installation, and replacement very inconvenient, and the use effect is poor.

[0004] Therefore, a bicycle crank which is convenient to replace is proposed to upgrade and transform on the basis of the device to solve these deficiencies. Content of the Utility Model

[0005] The purpose of the utility model is to provide a bicycle crank which is convenient to replace to solve the problems in the background art.

[0006] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0007] A bicycle crank which is convenient to replace, including a sprocket disc. The outer end of the sprocket disc is fixedly connected with a T-shaped fixing block. The outer end of the T-shaped fixing block is slidably connected with a concave mounting block. The lower end of the concave mounting block is fixedly connected with a crank. The inner wall of the T-shaped fixing block is slidably connected with a sliding rod. The outer end of the sliding rod is fixedly installed with a spring. One end of the spring is fixedly installed with the inner wall of the T-shaped fixing block. One end of the sliding rod is fixedly connected with a clamping block. The surface of the concave mounting block is provided with a clamping groove for one end of the clamping block to be clamped. One end of the T-shaped fixing block is fixedly connected with a stop block. The other end of the T-shaped fixing block is slidably connected with a shift rod. The inner wall of the T-shaped fixing block is provided with a disassembly mechanism.

[0008] Furthermore, the surface of the concave mounting block is provided with a sealing groove, and the inner wall of the sealing groove is slidably connected with a T-shaped sealing block.

[0009] Furthermore, a guiding rod is arranged inside the spring. The outer end of the guiding rod is slidably connected with the inner wall of the sliding rod. Both ends of the guiding rod are fixedly installed with the inner wall of the T-shaped fixing block.

[0010] Furthermore, the disassembly mechanism includes a concave rotating block. The outer end of the T-shaped fixing block is rotatably connected to the concave rotating block. One end of the concave rotating block is fixedly installed with a first gear. One end of the first gear is meshed with a second gear. One end of the second gear is rotatably connected to the inner wall of the T-shaped fixing block. The outer end of the second gear is fixedly installed with a threaded rod. The outer end of the threaded rod is threadedly connected to a threaded plate. The outer end of the threaded plate is fixedly installed with one end of the retaining rod.

[0011] Furthermore, a limiting rod is slidably connected to the inner wall of the threaded plate. Both ends of the limiting rod are fixedly installed on the inner wall of the T-shaped fixing block.

[0012] Furthermore, a rubber block is fixedly installed on the outer end of the retaining rod. The outer end of the rubber block abuts against the outer end of the concave mounting block.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By inserting a tool into the concave rotating block and rotating it, the first gear drives the second gear to rotate, causing the threaded rod to drive the threaded plate to move downward, facilitating the entry of the retaining rod into the T-shaped fixing block. By using a tool to squeeze the clamping block into the T-shaped fixing block, the clamping block is separated from the clamping groove, facilitating the separation of the concave mounting block at the upper end of the crank from the T-shaped fixing block, and facilitating the rapid disassembly of the crank. Conversely, through the action of the spring, the clamping block is engaged with the clamping groove, enabling the rapid connection of the concave mounting block and the T-shaped fixing block, facilitating the rapid installation of the crank. Rotating the concave rotating block in the reverse direction causes the retaining rod to contact the outer end of the concave mounting block, stably fixing the concave mounting block on the T-shaped fixing block. Description of the Drawings

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

[0016] Figure 2 is a schematic diagram of the structure of the concave mounting block of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the T-shaped fixing block of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the disassembly mechanism of the present utility model.

[0019] Reference Numerals: 1, sprocket disc; 11, T-shaped fixing block; 12, concave mounting block; 13, T-shaped sealing block; 14, crank; 15, stop block; 16, clamping block; 17, sealing groove; 18, clamping groove; 19, guide rod; 190, sliding rod; 191, spring; 2, disassembly mechanism; 21, concave rotating block; 22, retaining rod; 23, threaded plate; 24, threaded rod; 25, limiting rod; 27, first gear; 28, second gear. Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in a variety of different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0022] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] In the description of the implementation mode of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", "above", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0024] Such as Figures 1 to 4As shown in the figure, a bicycle crank that is convenient to replace includes a sprocket disk 1. A T-shaped fixing block 11 is fixedly connected to the outer end of the sprocket disk 1. A concave mounting block 12 is slidably connected to the outer end of the T-shaped fixing block 11. A crank 14 is fixedly connected to the lower end of the concave mounting block 12. A sliding rod 190 is slidably connected to the inner wall of the T-shaped fixing block 11. A spring 191 is fixedly installed at the outer end of the sliding rod 190. One end of the spring 191 is fixedly installed with the inner wall of the T-shaped fixing block 11. One end of the sliding rod 190 is fixedly connected to a clamping block 16. A clamping groove 18 for the end of the clamping block 16 to be clamped is formed on the surface of the concave mounting block 12. A stop block 15 is fixedly connected to one end of the T-shaped fixing block 11. A blocking rod 22 is slidably connected to the other end of the T-shaped fixing block 11. A disassembly mechanism 2 is arranged on the inner wall of the T-shaped fixing block 11; specifically, by using a tool to squeeze the clamping block 16 into the inside of the T-shaped fixing block 11, the clamping block 16 is separated from the clamping groove 18, which is convenient for separating the concave mounting block at the upper end of the crank 14 from the T-shaped fixing block 11, and is convenient for quickly disassembling the crank. On the contrary, through the action of the spring 191, the clamping block 16 is clamped with the clamping groove 18, and the concave mounting block is quickly connected to the T-shaped fixing block 11, which is convenient for quickly installing the crank.

[0025] As Figure 1 and Figure 2 shown, a sealing groove 17 is formed on the surface of the concave mounting block 12. A T-shaped sealing block 13 is slidably connected to the inner wall of the sealing groove 17; specifically, it is convenient to seal the connection between the clamping block 16 and the clamping groove 18, and reduce rust at the connection between the clamping block 16 and the clamping groove 17.

[0026] As Figure 1 and Figure 3 shown, a guiding rod 19 is arranged on the inner wall of the spring 191. The outer end of the guiding rod 19 is slidably connected to the inner wall of the sliding rod 190. Both ends of the guiding rod 19 are fixedly installed with the inner wall of the T-shaped fixing block 11; specifically, it is convenient for the sliding rod 190 to move stably.

[0027] As Figure 1 and Figure 4As shown in the figure, the disassembly mechanism 2 includes a concave rotating block 21. The outer end of the T-shaped fixing block 11 is rotatably connected to the concave rotating block 21. One end of the concave rotating block 21 is fixedly installed with a first gear 27. One end of the first gear 27 is meshed and connected with a second gear 28. One end of the second gear 28 is rotatably connected to the inner wall of the T-shaped fixing block 11. The outer end of the second gear 28 is fixedly installed with a threaded rod 24. The outer end of the threaded rod 24 is threadedly connected with a threaded plate 23. The outer end of the threaded plate 23 is fixedly installed with one end of a stop rod 22. The outer end of the stop rod 22 is fixedly installed with a rubber block. The outer end of the rubber block abuts against the outer end of the concave mounting block 12. Specifically, by inserting a tool into the concave rotating block 21 and rotating it, the first gear 27 drives the second gear 28 to rotate, and the threaded rod 24 drives the threaded plate 23 to move downward, facilitating the stop rod 22 to enter the inside of the T-shaped fixing block 11 and facilitating the disassembly of the concave mounting block 12 from the T-shaped fixing block 11.

[0028] As Figure 1 and Figure 4 shown in the figure, a limiting rod 25 is slidably connected to the inner wall of the threaded plate 23. Both ends of the limiting rod 25 are fixedly installed on the inner wall of the T-shaped fixing block 11. Specifically, it facilitates the stable movement of the threaded plate 23.

[0029] In summary: When the bicycle crank needs to be disassembled and replaced, insert a tool into the concave rotating block 21 and rotate it, so that the first gear 27 drives the second gear 28 to rotate, and the threaded rod 24 drives the threaded plate 23 to move downward, facilitating the stop rod 22 to enter the inside of the T-shaped fixing block 11, removing the T-shaped sealing block 13 from the sealing groove 17, and then squeezing the clamping block 16 into the inside of the T-shaped fixing block 11 through the tool to separate the clamping block 16 from the clamping groove 18, facilitating the separation of the concave mounting block at the upper end of the crank 14 from the T-shaped fixing block 11 and facilitating the quick disassembly of the crank.

[0030] Slide the concave mounting block 12 onto the T-shaped fixing block 11. Through the action of the spring 191, the clamping block 16 is engaged with the clamping groove 18 to fix the concave mounting block on the T-shaped fixing block 11. Rotate the concave rotating block 21 in the reverse direction so that the stop rod 22 contacts the outer end of the concave mounting block 12 to stably fix the concave mounting block 12 on the T-shaped fixing block 11.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bicycle crank that is easy to replace, comprising a chain wheel (1), characterized in that: The outer end of the sprocket wheel (1) is fixedly connected to a T-shaped fixing block (11), the outer end of the T-shaped fixing block (11) is slidably connected to a concave mounting block (12), the lower end of the concave mounting block (12) is fixedly connected to a crank (14), the inner wall of the T-shaped fixing block (11) is slidably connected to a sliding rod (190), the outer end of the sliding rod (190) is fixedly installed with a spring (191), one end of the spring (191) is fixedly installed with the inner wall of the T-shaped fixing block (11), one end of the sliding rod (190) is fixedly connected to a clamping block (16), the surface of the concave mounting block (12) is provided with a clamping groove (18) for clamping one end of the clamping block (16), one end of the T-shaped fixing block (11) is fixedly connected to a stopper (15), the other end of the T-shaped fixing block (11) is slidably connected to a stopper rod (22), and the inner wall of the T-shaped fixing block (11) is provided with a disassembly mechanism (2).

2. A bicycle crank that is easy to replace as claimed in claim 1, characterized in that: A sealing groove (17) is provided on the surface of the concave mounting block (12), and a T-shaped sealing block (13) is slidably connected to the inner wall of the sealing groove (17).

3. The easily replaceable bicycle crank according to claim 1, characterized in that: The inner wall of the spring (191) is provided with a guide rod (19), the outer end of the guide rod (19) is slidably connected to the inner wall of the sliding rod (190), and the two ends of the guide rod (19) are fixedly mounted to the inner wall of the T-shaped fixing block (11).

4. The easily replaceable bicycle crank according to claim 1, characterized in that: The disassembly mechanism (2) comprises a concave rotating block (21), the outer end of the T-shaped fixed block (11) is rotatably connected to the concave rotating block (21), one end of the concave rotating block (21) is fixedly mounted with a gear 1 (27), one end of the gear 1 (27) is meshingly connected with a gear 2 (28), one end of the gear 2 (28) is rotatably connected to the inner wall of the T-shaped fixed block (11), the outer end of the gear 2 (28) is fixedly mounted with a threaded rod (24), the outer end of the threaded rod (24) is threadedly connected to a threaded plate (23), and the outer end of the threaded plate (23) is fixedly mounted with one end of the shift rod (22).

5. The easily replaceable bicycle crank according to claim 4, characterized in that: The inner wall of the threaded plate (23) is slidably connected to a limit rod (25), and both ends of the limit rod (25) are fixedly mounted to the inner wall of the T-shaped fixing block (11).

6. The easily replaceable bicycle crank according to claim 1, characterized in that: A rubber block is fixedly mounted on the outer end of the shift rod (22), and the outer end of the rubber block abuts against the outer end of the concave mounting block (12).

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