Quick-release mechanism for crank

Abstract

The utility model discloses a crank quick release mechanism which comprises a crank body, the top of the crank body is fixedly connected with a sleeve shell, the right side of the sleeve shell is provided with an opening, a main shaft is horizontally erected in the opening rightwards, the inner side of the left end of the main shaft is matched with a clamping sleeve in a left-right sliding mode, and the left side of the clamping sleeve is fixedly connected with a fixing plate. The left side of the fixing plate is fixedly connected with the sleeve shell, a pressing hole is formed in the center of the top of the sleeve shell, a first clamping groove and a second clamping groove are formed in the positions, corresponding to the main shaft and the clamping sleeve, under the pressing hole respectively, a clamping head is arranged in the second clamping groove in an up-down sliding fit mode, and the clamping head is jointly composed of an upper sliding block and a lower clamping base. Compared with a traditional integrated structure and a locking screw fixing mode, the crank is more efficient in disassembly and assembly and more suitable for being used in a child bicycle, and for a crank partially adopting a rotating clamping fixing mode, the problem that the crank is locked or disengaged in the using process can be effectively solved through a linear pulling and inserting mode of the crank.

Description

Technical Field

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

[0002] Children's bicycles refer to bicycles suitable for children aged 4-8 years old. They are ridden by a driving mechanism acting on the rear wheel. There are various wheel diameters and styles with or without a balance wheel, which are suitable for the use needs of children of different ages. The exposed edges and corners of children's bicycles will be rounded to reduce the possible harm to children. At the same time, the part of children's bicycles that wears out the most during use is the crank structure connected to the pedals. It is frequently used and bears most of the pressure during exercise. It is easy to be damaged and deformed, and often needs to be disassembled, corrected or replaced. In traditional bicycles, the crank structure at the pedals and the gear shaft connected to the drive chain are mostly directly connected. The crank is made of an integrated Z-shaped handlebar. Some of them are independently split into the main shaft of the section connected to the gear shaft and fixed to the crank by a locking screw. Both require professional tools to assist in disassembly. It is impossible to quickly disassemble the crank connected to the pedal, which is inefficient. In addition, for some cranks that use reverse rotation and locking fixing, the cranks are easily locked during normal riding of children and are difficult to rotate and disassemble, and some children who like to pedal back will detach them. Utility Model Content

[0003] The purpose of the utility model is to provide a crank quick-release mechanism, which is more efficient in assembly and disassembly than the traditional integrated structure and locking screw fixing method, and is more suitable for quick replacement of children's bicycles. Compared with some cranks that adopt a rotating snap-fit ​​fixing method, its linear plug-in method can effectively avoid the problem of the crank being locked or detached during use.

[0004] The top of the lower frame is provided with a toothed plate, and the toothed plate is connected with the toothed plate by the toothed plate, and the toothed plate is connected with the toothed plate to the left and right sides of the toothed plate. The bottom of the return spring is fixedly connected to the sleeve, the upper slider passes upward through the first slot and extends into the pressing hole, and a button is fitted on the top of the upper slider, and the button passes upward through the pressing hole and extends out of the outer side of the casing and slides up and down with it. The combined crank body and the main shaft are arranged for linear plug-in and disassembly, and the embedded limit between the main shaft, the casing and the sleeve is completed by using the card head in conjunction with the return spring, and then the whole crank together with the casing is pulled out horizontally while the card head is retracted by pressing the button to complete the quick release of the crank. When assembling, the button is pressed first, and then the horizontal insertion is aligned and released. Compared with the traditional integrated structure and the locking screw fixing method, the disassembly and assembly is more efficient, and it is more suitable for children's bicycles for quick replacement and use. Compared with some cranks that adopt a rotating card fixing method, its linear plug-in method can effectively avoid the problem of the crank being locked or detached during use.

[0005] According to the crank quick release mechanism, the bottoms of the front and rear sides of the button are symmetrically fixed with limit buckles, and the upper sides of the limit buckles are pressed and fitted with the housing to prevent the button from falling back.

[0006] According to the crank quick-release mechanism, the top outer edge of the upper slider is subjected to rounded grinding and polishing, so that the spindle can be pulled out or inserted into the housing more smoothly to complete quick disassembly and assembly.

[0007] According to the crank quick release mechanism, a plurality of anti-skid pads are evenly arranged on the outer side of the pedal, and the inner layers of the anti-skid pads are filled with elastic rubber, so as to provide the pedal with a stronger fit and improve the anti-skid property.

[0008] According to the crank quick release mechanism, a rubber gasket is fixed around the right outer edge of the fixing plate, and the left side of the main shaft is pressed and fitted with the rubber gasket, thereby reducing the collision noise and loss when the main shaft and the sleeve are connected.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] In the utility model, a combined crank body and a main shaft are provided for linear plug-in and disassembly, and a clamp is used in conjunction with a return spring to complete the embedded limit between the main shaft, the sleeve and the clamp. Then, by pressing a button to control the retraction of the clamp, the entire crank together with the sleeve is pulled out horizontally to complete the quick disassembly of the crank. When assembling, the button is pressed first, and then the horizontal insertion is aligned and released. Compared with the traditional integrated structure and locking screw fixing method, its disassembly and assembly is more efficient and more suitable for children's bicycles for quick replacement and use. Compared with some cranks that adopt a rotating clamping fixing method, its linear plug-in method can effectively avoid the problem of the crank being locked or detached during use.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0013] Figure 1 This is a disassembly schematic diagram of a crank quick-release mechanism of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure of a clamping head in a crank quick release mechanism of the utility model;

[0015] Figure 3 It is a schematic diagram of the engagement between the clamping head and the main shaft in a crank quick release mechanism of the utility model;

[0016] Figure 4 The utility model is an overall schematic diagram of a crank quick-release mechanism.

[0017] In the figure: 1. crank body; 2. pedal; 3. sleeve; 4. main shaft; 5. sleeve; 6. fixing plate; 7. pressing hole; 8. first slot; 9. second slot; 10. clamping head; 11. return spring; 12. button; 13. limit buckle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides a technical solution: a crank quick-release mechanism, including a crank body 1, a pedal 2 is rotatably connected to the left side of the bottom of the crank body 1, a sleeve 3 is fixedly connected to the top of the crank body 1, an opening is provided on the right side of the sleeve 3, a main shaft 4 is horizontally mounted to the right in the opening, a clamping sleeve 5 is slidably fitted with the left and right inner side of the left end of the main shaft 4, a fixing plate 6 is fixedly connected to the left side of the clamping sleeve 5, and the left side of the fixing plate 6 is fixedly connected to the sleeve 3, a pressing hole 7 is provided at the top center of the sleeve 3, and a first clamping groove 8 and a second clamping groove 9 are respectively provided on the corresponding main shaft 4 and the clamping sleeve 5 directly below the pressing hole 7, a clamping head 10 is slidably fitted up and down in the second clamping groove 9, and the clamping head 10 is composed of an upper slider and a lower clamping seat, wherein the upper slider is fixedly mounted at the top center of the lower clamping seat, the top outer edge of the upper slider is rounded and polished, and the lower clamping seat It is located on the inner side of the sleeve 5 and its top is squeezed and fitted with the main shaft 4. A guide hole is provided at the bottom center of the lower seat, and a retraction spring 11 is installed in the guide hole. The bottom of the retraction spring 11 is fixedly connected to the sleeve 5. The upper slider passes upward through the first slot 8 and extends into the pressing hole 7. A button 12 is fitted on the top. Limit buckles 13 are symmetrically fixed to the bottom of the front and rear sides of the button 12. The upper sides of the limit buckles 13 are squeezed and fitted with the sleeve shell 3. The button 12 passes upward through the pressing hole 7 and extends out of the outer side of the sleeve shell 3 and slides up and down with it. Compared with the traditional one-piece structure and the locking screw fixing method, it is more efficient in disassembly and assembly, and is more suitable for children's bicycles for quick replacement and use. Compared with some cranks that adopt a rotating clamping fixing method, its linear plug-in method can effectively avoid the problem of the crank being locked or detached during use.

[0020] A number of anti-skid pads are evenly distributed on the outside of the foot pedal 2, and the inner layers of the anti-skid pads are filled with elastic rubber. A rubber gasket is fixed around the right outer edge of the fixed plate 6, and the left side of the main shaft 4 is squeezed and fitted with the rubber gasket to assist in buffering and noise reduction of collision contact.

[0021] Working principle: In the utility model, a combined crank body 1 and a main shaft 4 are provided for linear plugging and disassembly, and a clamp head 10 is used in cooperation with a retraction spring 11 to complete the embedded limit between the main shaft 4 and the casing 3 and the clamping sleeve 5. Then, by pressing the button 12 to control the retraction of the clamp head 10, the entire crank together with the casing 3 is pulled out horizontally to complete the quick disassembly of the crank. When assembling, the button 12 is also pressed first, and then the horizontal insertion is aligned and released. Compared with the traditional integrated structure and the locking screw fixing method, the disassembly and assembly is more efficient, more suitable for the rapid replacement of children's bicycles, and is similar to some bicycles that adopt For the crank with a rotating locking fixation method, its linear insertion and extraction method can effectively avoid the problem of the crank being locked or detached during use. The specific quick release steps are: first press the button 12 downward to drive the clamping head 10 to retract as a whole into the clamping sleeve 5 until the top of the upper slider of the clamping head 10 is flush with the first clamping groove 8 on the main shaft 4. At this time, keep the pressing state and pull the crank forward horizontally. The top of the upper slider with rounded corners is affected by the downward component force and moves down to the inside of the main shaft 4 and slides against its inner wall until the entire crank is pulled out and the clamping head 10 pops out again under the action of the return spring 11 to complete the quick release.

[0022] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A crank quick release mechanism, comprising a crank body (1), characterized in that: The left side of the bottom of the crank body (1) is rotatably connected to a pedal (2), the top of the crank body (1) is fixedly connected to a casing (3), the right side of the casing (3) is provided with an opening, a main shaft (4) is horizontally arranged in the opening to the right, a clamping sleeve (5) is slidably fitted on the inner side of the left end of the main shaft (4), a fixing plate (6) is fixedly connected to the left side of the clamping sleeve (5), and the left side of the fixing plate (6) is fixedly connected to the casing (3); A pressing hole (7) is provided at the center of the top of the sleeve (3), and a first card slot (8) and a second card slot (9) are provided on the corresponding main shaft (4) and the sleeve (5) respectively directly below the pressing hole (7), and a card head (10) is slidably engaged with the second card slot (9) up and down, and the card head (10) is composed of an upper slider and a lower seat, wherein the upper slider is fixedly mounted at the center of the top of the lower seat, the lower seat is located on the inner side of the sleeve (5) and its top is pressed and fitted with the main shaft (4), and a guide hole is provided at the center of the bottom of the lower seat, and a return spring (11) is installed in the guide hole, and the bottom of the return spring (11) is fixedly connected to the sleeve (5), the upper slider passes through the first card slot (8) upward and extends into the pressing hole (7), and a button (12) is fitted on its top, and the button (12) passes through the pressing hole (7) upward and extends out of the outer side of the sleeve (3) and slides with it up and down.

2. A crank quick release mechanism according to claim 1, characterized in that: Limiting buckles (13) are symmetrically fixed to the bottoms of the front and rear sides of the button (12), and the upper sides of the limiting buckles (13) are pressed and fitted with the casing (3).

3. A crank quick release mechanism according to claim 1, characterized in that: The top outer edges of the upper sliding blocks are all subjected to rounded corner grinding and polishing.

4. A crank quick release mechanism according to claim 1, characterized in that: A plurality of anti-skid pads are evenly arranged on the outer side of the foot pedal (2), and the inner layers of the anti-skid pads are filled with elastic rubber.

5. The crank quick release mechanism according to claim 1, characterized in that: A rubber gasket is fixed around the right outer edge of the fixing plate (6), and the left side of the main shaft (4) is pressed and fitted with the rubber gasket.

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