Bicycle center shaft fixing piece

Abstract

The utility model relates to the technical field of bicycle spare and accessory parts, and discloses a bicycle middle shaft fixing piece which comprises a middle shaft, a sleeve, two bearings and a bicycle five-way pipe, the sleeve is rotationally arranged on the outer wall of the middle shaft in a sleeved mode through the bearings, the middle shaft movably penetrates through the left end and the right end of the bicycle five-way pipe through the sleeve, and the two bearings are arranged on the middle shaft. A fixing mechanism is arranged between the middle shaft and the bicycle five-way pipe; the fixing mechanism comprises a limiting sliding block, a limiting annular plate and a U-shaped clamping plate, by arranging the fixing mechanism, a person can conveniently disassemble, assemble and replace the center shaft, the disassembling and assembling efficiency of the person is improved, when the center shaft is fixed through the fixing mechanism, the fixing service life is long, the stability is high, and the problem that when an existing center shaft is fixed to a bicycle five-way pipe, the center shaft cannot be fixed easily is solved. The problems that in the prior art, due to the fact that thread connection is adopted mostly, threads are abraded after being stressed for a long time and are not prone to being disassembled by workers, the fixing stability of a center shaft is affected, and the fixing service life is short are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts and accessories, in particular to a bicycle center shaft fixing piece. Background Art

[0002] The middle axle is a rotating part installed in the bottom bracket of the frame and used to connect the left and right cranks. It determines the conversion of the driving force of the entire bicycle. The torque generated by the pedals is transmitted to the flywheel through the middle axle. The quality of the middle axle directly affects the quality of the entire bicycle.

[0003] When the existing middle shaft is fixed on the bicycle five-way tube, most of them use threaded connection, which causes the threads to wear after being subjected to force for a long time, making it difficult for personnel to disassemble, and affecting the stability of the middle shaft fixation. The fixation life is short. Therefore, we provide a bicycle middle shaft fixing part. Utility Model Content

[0004] The utility model aims to provide a bicycle middle shaft fixing piece, which solves the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bicycle middle shaft fixing part, comprising a middle shaft, a sleeve, a bearing, and a bicycle five-way pipe, wherein the sleeve is rotatably sleeved on the outer wall of the middle shaft through the bearing, and the number of the bearings is two, the middle shaft movably passes through the left and right ends of the bicycle five-way pipe through the sleeve, and a fixing mechanism is arranged between the middle shaft and the bicycle five-way pipe;

[0006] The fixing mechanism comprises a limit slide block, a limit ring plate, and a U-shaped clamping plate. The limit slide block is fixedly installed on the outer wall of the sleeve, and a limit slide groove is provided on the inner wall of the bicycle five-way tube. The limit slide block is slidably connected with the limit slide groove. A fixing rod is fixedly installed on the outer side of the limit slide block, and a fixing hole is provided on the limit ring plate. The fixing rod movably penetrates the limit ring plate through the fixing hole. A clamping groove is provided on the outer wall of the fixing rod, and the U-shaped clamping plate is clamped in the clamping groove. A connecting block is fixedly installed on the inner side of the U-shaped clamping plate, and a limiting groove is provided on the outer side of the limiting ring plate. The connecting block is slidably connected with the limiting groove, and a limiting rod is fixedly installed on the inner wall of the limiting groove. A rod hole is provided on the connecting block, and the limiting rod movably penetrates the connecting block through the rod hole, and a spring is surrounded by the outer wall of the limiting rod. One end of the spring is fixedly installed on the top of the connecting block, and the other end of the spring is fixedly installed on the inner wall of the limiting groove.

[0007] Preferably, there are four limit sliders on the outer walls near both ends of the sleeve, and the limit sliders are adapted to the limit slide grooves. By providing the limit sliders, the sleeve can be limited, thereby improving the stability of the sleeve in the bicycle five-way tube.

[0008] Preferably, the fixing rod is matched with the fixing hole, and the limiting rod is matched with the rod hole. By setting the limiting rod, a limiting effect can be played on the connecting block and the spring, thereby ensuring the stability of the connecting block when sliding and the spring when compressed.

[0009] Preferably, a pull plate is fixedly installed on the outer side of the U-shaped pallet, and the U-shaped pallet is adapted to the card slot. By providing the pull plate, it is convenient for personnel to pull the U-shaped pallet through the pull plate, thereby facilitating personnel operation.

[0010] Preferably, a ring pad is provided on the inner wall of the limiting ring plate, a positioning block is fixedly installed on the outer wall of the ring pad, a positioning groove is opened on the inner wall of the ring plate, the positioning block is inserted in the positioning groove, a wall pad is fixedly installed on the inner wall of the positioning groove, and the wall pad is in close contact with the outer wall surface of the positioning block.

[0011] Preferably, the number of the positioning blocks and the number of the positioning grooves are both four, and the wall pads and the ring pads are both made of wear-resistant rubber. By providing the wall pads, the connection tightness between the positioning blocks and the positioning grooves can be increased, thereby improving the installation stability of the ring pads.

[0012] The utility model provides a bicycle middle shaft fixing part. The bicycle middle shaft fixing part has the following beneficial effects:

[0013] (1) The bicycle center shaft fixing part can facilitate personnel to disassemble, assemble and replace the center shaft by setting a fixing mechanism, thereby improving the disassembly and assembly efficiency of personnel. When the center shaft is fixed by the mechanism, the fixing life is long and the stability is strong. This solves the problem that when the existing center shaft is fixed on the bicycle five-way pipe, most of them adopt threaded connection, which causes the thread to wear after being subjected to force for a long time, making it difficult for personnel to disassemble, and affecting the stability of the center shaft fixing, resulting in a short fixing life.

[0014] (2) The bicycle center shaft fixing part can play a certain shock-absorbing role on the center shaft when in use by providing a ring gasket, thereby reducing the friction on the structure in the fixing mechanism and further improving the service life of the fixing mechanism. In addition, the positioning block, positioning groove and wall gasket can facilitate personnel to replace the ring gasket, thereby ensuring the normal use effect of the ring gasket. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0017] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0018] Figure 4This is a schematic diagram of the fixing rod structure of the utility model.

[0019] In the figure: 1, middle axis; 2, sleeve; 3, bearing; 4, bicycle five-way pipe; 5, fixing mechanism; 6, pull plate; 7, ring gasket; 8, positioning block; 9, positioning groove; 10, wall gasket; 501, limiting slide groove; 502, limiting slider; 503, fixing rod; 504, limiting ring plate; 505, fixing hole; 506, U-shaped clamping plate; 507, limiting groove; 508, connecting block; 509, rod hole; 510, limiting rod; 511, spring; 512, clamping groove. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0023] The bicycle middle shaft fixing member provided by the utility model is preferably implemented as follows Figures 1 to 4 As shown: a bicycle middle shaft fixing part, comprising a middle shaft 1, a sleeve 2, a bearing 3, and a bicycle bottom bracket 4. The sleeve 2 is rotatably sleeved on the outer wall of the middle shaft 1 through the bearing 3, and the number of the bearings 3 is two. The middle shaft 1 movably passes through the left and right ends of the bicycle bottom bracket 4 through the sleeve 2, and a fixing mechanism 5 is arranged between the middle shaft 1 and the bicycle bottom bracket 4;

[0024] The fixing mechanism 5 includes a limit slider 502, a limit ring plate 504, and a U-shaped card plate 506. The limit slider 502 is fixedly installed on the outer wall of the sleeve 2. The inner wall of the bicycle five-way pipe 4 is provided with a limit slide groove 501. The limit slider 502 is slidably connected with the limit slide groove 501. A fixing rod 503 is fixedly installed on the outer side of the limit slider 502. The limit ring plate 504 is provided with a fixing hole 505. The fixing rod 503 movably penetrates the limit ring plate 504 through the fixing hole 505. The outer wall of the fixing rod 503 is provided with a card groove 512. The U-shaped card plate 506 is carded In the slot 512, a connecting block 508 is fixedly installed on the inner side of the U-shaped clamping plate 506, a limiting groove 507 is provided on the outer side of the limiting ring plate 504, the connecting block 508 is slidably connected to the limiting groove 507, a limiting rod 510 is fixedly installed on the inner wall of the limiting groove 507, a rod hole 509 is provided on the connecting block 508, the limiting rod 510 movably passes through the connecting block 508 through the rod hole 509, a spring 511 is surrounded on the outer wall of the limiting rod 510, one end of the spring 511 is fixedly installed on the top of the connecting block 508, and the other end of the spring 511 is fixedly installed on the inner wall of the limiting groove 507.

[0025] Specifically, the U-shaped card plate 506 is pulled toward the periphery of the limiting ring plate 504, and the U-shaped card plate 506 drives the connecting block 508 to compress the spring 511. When the U-shaped card plate 506 moves toward the periphery of the limiting ring plate 504, it disengages from the card slot 512 on the fixing rod 503, so that the U-shaped card plate 506 no longer limits and fixes the limiting ring plate 504 on the fixing rod 503. At this time, the limiting ring plate 504 can be pulled toward one end of the middle axis 1, so that the limiting ring plate 504 is separated from the bicycle five-way pipe 4, so that the limiting ring plate 504 no longer blocks the limiting slider 502. At this time, the middle axis 1 can be pulled, so that the middle axis 1 The shaft 1 drives the limiting slide block 502 to slide in the limiting slide groove 501 through the sleeve 2, and finally the middle shaft 1 is separated from the bicycle five-way tube 4, thereby completing the disassembly of the middle shaft 1. The mechanism is convenient for personnel to disassemble, assemble and replace the middle shaft 1, and the disassembly efficiency of personnel is improved. When the middle shaft 1 is fixed by the mechanism, the fixing life is long and the stability is strong. This solves the problem that when the existing middle shaft 1 is fixed on the bicycle five-way tube 4, most of them adopt threaded connection, which causes the thread to wear after being subjected to force for a long time, making it difficult for personnel to disassemble, and affecting the stability of the fixing of the middle shaft 1 and the short fixing life.

[0026] Furthermore, there are four limit sliders 502 on the outer walls of both ends of the sleeve 2, and the limit sliders 502 are matched with the limit sliding grooves 501;

[0027] The limiting slider 502 is provided to limit the sleeve 2, thereby improving the stability of the sleeve 2 in the bottom bracket 4 of the bicycle.

[0028] Furthermore, the fixing rod 503 is matched with the fixing hole 505, and the limiting rod 510 is matched with the rod hole 509;

[0029] The limiting rod 510 can limit the connection block 508 and the spring 511, thereby ensuring the stability of the connection block 508 when sliding and the spring 511 when being compressed.

[0030] Furthermore, a pull plate 6 is fixedly installed on the outside of the U-shaped card plate 506, and the U-shaped card plate 506 is adapted to the card slot 512;

[0031] Among them, by providing the pulling plate 6, it is convenient for personnel to pull the U-shaped card plate 506 through the pulling plate 6, thereby facilitating the operation of personnel. Embodiment 2

[0032] Based on the first embodiment, the bicycle middle shaft fixing member provided by the present invention is preferably implemented as follows: Figures 1 to 4 As shown: a ring gasket 7 is provided on the inner wall of the limiting ring plate 504, a positioning block 8 is fixedly installed on the outer wall of the ring gasket 7, a positioning groove 9 is opened on the inner wall of the ring plate, the positioning block 8 is inserted in the positioning groove 9, a wall gasket 10 is fixedly installed on the inner wall of the positioning groove 9, and the wall gasket 10 is in close contact with the outer wall surface of the positioning block 8.

[0033] Specifically, the above technical solution is that by setting the ring gasket 7, a certain shock-absorbing effect can be played on the central axis 1 when in use, thereby reducing the friction on the structure in the fixing mechanism 5, further improving the service life of the fixing mechanism 5, and through the positioning block 8, the positioning groove 9 and the wall gasket 10, it is convenient for personnel to replace the ring gasket 7 to ensure the normal use effect of the ring gasket 7.

[0034] Furthermore, the number of the positioning blocks 8 and the number of the positioning grooves 9 are both four, and the wall pads 10 and the ring pads 7 are both made of wear-resistant rubber;

[0035] Wherein, by providing the wall pad 10 , the connection tightness between the positioning block 8 and the positioning groove 9 can be increased, thereby improving the installation stability of the ring pad 7 .

[0036] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A bicycle middle shaft fixing part, comprising a middle shaft (1), a sleeve (2), a bearing (3), and a bicycle bottom bracket tube (4), characterized in that: The sleeve (2) is rotatably sleeved on the outer wall of the middle shaft (1) via a bearing (3), and the number of the bearings (3) is two. The middle shaft (1) movably passes through the left and right ends of the bicycle five-way pipe (4) via the sleeve (2), and a fixing mechanism (5) is provided between the middle shaft (1) and the bicycle five-way pipe (4); The fixing mechanism (5) comprises a limiting slider (502), a limiting ring plate (504), and a U-shaped clamping plate (506); the limiting slider (502) is fixedly mounted on the outer wall of the sleeve (2); a limiting sliding groove (501) is provided on the inner wall of the bicycle five-way tube (4); the limiting slider (502) is slidably connected to the limiting sliding groove (501); a fixing rod (503) is fixedly mounted on the outer side of the limiting slider (502); a fixing hole (505) is provided on the limiting ring plate (504); the fixing rod (503) movably passes through the limiting ring plate (504) through the fixing hole (505); a clamping groove (512) is provided on the outer wall of the fixing rod (503); and the U-shaped clamping plate (506) is clamped to the fixing rod (503). In the clamping groove (512), a connecting block (508) is fixedly installed on the inner side of the U-shaped clamping plate (506), a limiting groove (507) is provided on the outer side of the limiting ring plate (504), the connecting block (508) is slidably connected to the limiting groove (507), a limiting rod (510) is fixedly installed on the inner wall of the limiting groove (507), a rod hole (509) is provided on the connecting block (508), the limiting rod (510) movably penetrates the connecting block (508) through the rod hole (509), and a spring (511) is surrounded on the outer wall of the limiting rod (510), one end of the spring (511) is fixedly installed on the top of the connecting block (508), and the other end of the spring (511) is fixedly installed on the inner wall of the limiting groove (507).

2. A bicycle middle shaft fixing member according to claim 1, characterized in that: There are four limit sliders (502) on the outer walls near both ends of the sleeve (2), and the limit sliders (502) are matched with the limit sliding grooves (501).

3. The bicycle middle shaft fixing member according to claim 1, characterized in that: The fixing rod (503) is matched with the fixing hole (505), and the limiting rod (510) is matched with the rod hole (509).

4. The bicycle middle shaft fixing member according to claim 1, characterized in that: A pull plate (6) is fixedly mounted on the outside of the U-shaped clamping plate (506), and the U-shaped clamping plate (506) is compatible with the clamping slot (512).

5. The bicycle middle shaft fixing member according to claim 1, characterized in that: The inner wall of the limiting ring plate (504) is provided with a ring gasket (7), the outer wall of the ring gasket (7) is fixedly mounted with a positioning block (8), the inner wall of the ring plate is provided with a positioning groove (9), the positioning block (8) is inserted into the positioning groove (9), the inner wall of the positioning groove (9) is fixedly mounted with a wall gasket (10), and the wall gasket (10) is in close contact with the outer wall surface of the positioning block (8).

6. A bicycle middle shaft fixing member according to claim 5, characterized in that: The number of the positioning blocks (8) and the number of the positioning grooves (9) are both four, and the material of the wall pad (10) and the ring pad (7) are both wear-resistant rubber.

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