Bicycle flywheel rear axle

Abstract

The utility model discloses a bicycle flywheel rear axle, which relates to the field of bicycle flywheels, solves the problem that a protective sleeve of an existing flywheel rear axle is easy to cause rainwater infiltration and rust, and comprises a rear axle body and a two-way screw mounted on the inner side of the rear axle body, the two positioning nuts are symmetrically and fixedly installed at the two ends of the two-way screw rod, the outer sides of the positioning nuts make contact with the end of the rear axle body, adjusting nuts are rotationally installed at the two ends of the two-way screw rod, and protective shells are arranged on the outer sides of the adjusting nuts; an abutting plate is arranged between the positioning nut and the adjusting nut; the fixed clamping mechanism is used for assembling the abutting plate in a sealed mode, the fixed clamping mechanism is installed inside the protective shell, the abutting plate is fixed into the protective shell through the fixed clamping mechanism, the adjusting nut pushes the abutting plate to be fixed to a vehicle frame, the abutting plate is convenient to disassemble, and therefore the effects of sealing protection and convenient disassembly and maintenance are achieved.

Description

Technical Field

[0001] The utility model relates to the field of bicycle flywheels, in particular to a bicycle flywheel rear axle. Background Art

[0002] A bicycle flywheel is a component installed at the rear end of the frame's rear lower fork and on the right side of the rear wheel axle. It is an important transmission component that realizes the forward power of the bicycle through cooperation with the toothed disc and chain. The main function of the flywheel is to store and release energy, so that the bicycle can move forward more smoothly when pedaling. The speed level of the flywheel indicates the number of its wheels, and each wheel corresponds to a different speed gear. There are many well-known brands producing flywheels on the market.

[0003] When installing the flywheel, it needs to be installed with the rear axle, and the rear axle is fixed to the frame with a nut. When riding in rainy weather, rainwater enters between the nut and the rear axle and causes rust at the connection. The existing flywheel rear axle will install a protective sleeve at the connection and fix it on the nut with an elastic clamp block. However, when the elastic clamp block is pressed down and fixed, a strip groove needs to be opened for movement. The opening of the strip groove is large, which can easily cause rainwater to penetrate and accumulate in the protective sleeve, which makes it easier for the nut and the rear axle to rust. Utility Model Content

[0004] The purpose of the utility model is to provide a bicycle flywheel rear axle, which can solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bicycle flywheel rear axle, comprising a rear axle body and a bidirectional screw installed on the inner side of the rear axle body, and also comprising: two positioning nuts symmetrically fixedly installed on the two ends of the bidirectional screw, the outer sides of the positioning nuts are in contact with the end of the rear axle body, both ends of the bidirectional screw are rotatably installed with adjusting nuts, a protective shell is provided on the outer side of the adjusting nut, a butt plate is provided between the positioning nut and the adjusting nut, the adjusting nut pushes the butt plate to move so that the butt plate and the positioning nut are fixed on the frame, and the butt plate is located at the opening of the protective shell; a fixing clamping mechanism is used for sealing and assembling the butt plate, and the fixing clamping mechanism is installed inside the protective shell; a tightening mechanism is used for tightening or quickly disassembling the adjusting nut, and the tightening mechanism is installed inside the protective shell.

[0006] Preferably, the fixing clamping mechanism includes six support plates distributed in an annular shape and equidistantly on the outer side of the abutment plate, the support plate is fixedly installed on the inner side of the protective shell, the outer side of the support plate is slidably sleeved with a sleeve, the end of the sleeve away from the support plate is fixedly connected with a pressure block, and the end of the pressure block away from the sleeve is fixedly connected with an insertion block, the outer side of the abutment plate is provided with a slot for limiting the insertion of the insertion block, the outer side of the sleeve is fixedly connected with a sliding rod, an adjusting disk is rotatably installed on the inner side of the protective shell, the surface of the adjusting disk is provided with an arc groove for limiting the sliding of the sliding rod, and the sliding rod is pushed to move through the arc groove, and a rotating drum is rotatably installed on the end of the protective shell away from the abutment plate, the rotating drum is movably sleeved on the outer side of the bidirectional screw, and a plurality of support rods distributed in an annular shape and equidistantly are fixedly connected between the rotating drum and the adjusting disk, so that the rotating drum rotates the adjusting disk through the support rods.

[0007] Preferably, the tightening mechanism includes a nut seat fixedly mounted on the inner side of the protective shell, a nut groove is provided on the outer side of the nut seat for limiting the insertion of the adjusting nut, the protective shell is rotated to rotate the adjusting nut through the nut seat, a sliding cavity is provided on the surface of the nut seat for limiting the sliding of the support rod, an anti-slip sleeve is fixedly connected to the outer side of the protective shell, a plug ring is fixedly connected to a side of the support plate close to the adjusting nut, and an annular groove is provided on the outer side of the adjusting nut for limiting the insertion of the plug ring.

[0008] Preferably, the abutment plate extends from a side away from the rotating drum to the outside of the protective shell.

[0009] Preferably, the opening of the protective shell contacts the outer side of the abutment plate, thereby improving the sealing performance of the abutment plate to the protective shell.

[0010] Preferably, one end of the support plate is fixedly connected to a limiting block, and a cavity is provided on the inner side of the sleeve for limiting sliding of the limiting block to prevent the sleeve from sliding off the support plate.

[0011] Preferably, an annular holder for limiting the sliding of the adjusting disk is fixedly connected to the inner side of the protective shell, thereby improving the smoothness of the rotation of the adjusting disk.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model fixes the butt plate in the protective shell through the fixing clamp mechanism, and the adjusting nut pushes the butt plate to be fixed on the frame, and the butt plate can be disassembled, which is convenient for maintenance of the adjusting nut and the bidirectional screw, thereby achieving the effects of sealing protection and easy disassembly and maintenance.

[0014] 2. The utility model uses a tightening mechanism to insert the adjusting nut into the interior of the protective shell. Rotating the protective shell can drive the adjusting nut to rotate and move laterally on the bidirectional screw, thereby achieving the effect of facilitating the tightening of the adjusting nut and improving the convenience of installation and disassembly. 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 schematic diagram of the protective shell and the abutment plate structure in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the adjustment disk and the annular holder in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the insert block and the pressing block in the utility model;

[0019] Figure 5 It is a schematic diagram of the structure of the nut seat and the adjusting nut in the utility model.

[0020] In the figure: 1. rear axle body; 2. bidirectional screw; 3. clamping mechanism; 301. support plate; 302. sleeve; 303. pressure block; 304. insert block; 305. slide rod; 306. adjustment disk; 307. rotating drum; 308. support rod; 4. tightening mechanism; 401. nut seat; 402. anti-slip sleeve; 403. insert ring; 5. positioning nut; 6. adjusting nut; 7. protective shell; 8. abutment plate; 9. limit block; 10. annular holder. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Please refer to Figure 1-Figure 3The figure shows a bicycle flywheel rear axle, comprising a rear axle body 1 and a bidirectional screw 2 installed on the inner side of the rear axle body 1, and also comprising: two positioning nuts 5 symmetrically fixedly installed on both ends of the bidirectional screw 2, the outer side of the positioning nut 5 contacts the end of the rear axle body 1, both ends of the bidirectional screw 2 are rotatably installed with adjusting nuts 6, the outer side of the adjusting nut 6 is provided with a protective shell 7, a butt plate 8 is provided between the positioning nut 5 and the adjusting nut 6, the adjusting nut 6 pushes the butt plate 8 to move, so that the butt plate 8 and the positioning nut 5 are fixed on the frame, and the butt plate 8 is located at the opening of the protective shell 7; a fixed clamping mechanism 3 is used for sealing and assembling the butt plate 8, and the fixed clamping mechanism 3 is installed inside the protective shell 7; a tightening mechanism 4 is used for tightening or quickly disassembling the adjusting nut 6, and the tightening mechanism 4 is installed inside the protective shell 7.

[0023] See also Figure 2-Figure 5 The clamping mechanism 3 shown in the figure includes six support plates 301 distributed in an annular shape and equidistantly on the outside of the support plate 8. The support plate 301 is fixedly installed on the inner side of the protective shell 7. The outer side of the support plate 301 is slidably sleeved with a sleeve 302. The end of the sleeve 302 away from the support plate 301 is fixedly connected with a pressure block 303. The end of the pressure block 303 away from the sleeve 302 is fixedly connected with an insertion block 304. The outer side of the support plate 8 is provided with a slot for the insertion block 304 to limit the insertion. The outer side of the sleeve 302 is fixedly connected with a slide rod 3 05, an adjusting disk 306 is rotatably installed on the inner side of the protective shell 7, and an arc groove is opened on the surface of the adjusting disk 306 for the sliding rod 305 to limit the sliding, and the sliding rod 305 is pushed to move through the arc groove. A rotating cylinder 307 is rotatably installed on the end of the protective shell 7 away from the abutment plate 8, and the rotating cylinder 307 is movably sleeved on the outer side of the bidirectional screw 2. A plurality of support rods 308 distributed in an annular shape and at equal distances are fixedly connected between the rotating cylinder 307 and the adjusting disk 306, so that the rotating cylinder 307 rotates the adjusting disk 306 through the support rods 308;

[0024] The user rotates the drum 307 to drive the support rod 308 to rotate, so that the support rod 308 drives the adjustment disk 306 to rotate, and the arc groove on the adjustment disk 306 pulls the slide rod 305 to move, and the slide rod 305 drives the sleeve 302 to move along the outer side of the support plate 301, so that the sleeve 302 drives the insert block 304 on the pressure block 303 to be inserted into the slot of the abutment plate 8, so that the abutment plate 8 is fixed at the connection between the protective shell 7 and the bidirectional screw 2, providing a seal for the adjusting nut 6 to prevent rainwater from entering, solving the problem that the adjusting nut 6 and the bidirectional screw 2 are easily rusted due to rainwater infiltration, and the drum 307 can be disassembled by rotating it in the opposite direction, thereby achieving the effect of safe sealing and easy disassembly and maintenance.

[0025] See also Figure 2-Figure 5The tightening mechanism 4 shown in the figure includes a nut seat 401 fixedly mounted on the inner side of the protective shell 7, a nut groove for limiting the insertion of the adjusting nut 6 is provided on the outer side of the nut seat 401, the protective shell 7 is rotated to rotate the adjusting nut 6 through the nut seat 401, a sliding cavity for limiting the sliding of the support rod 308 is provided on the surface of the nut seat 401, an anti-slip sheath 402 is fixedly connected to the outer side of the protective shell 7, a plug ring 403 is fixedly connected to the side of the abutment plate 8 close to the adjusting nut 6, and an annular groove for limiting the insertion of the plug ring 403 is provided on the outer side of the adjusting nut 6;

[0026] The user puts the nut seat 401 on the outside of the adjusting nut 6. After fixing the abutment plate 8, the user holds the anti-slip sheath 402 on the outside of the protective shell 7 to drive the protective shell 7 to rotate. The nut seat 401 can drive the adjusting nut 6 to rotate on the outside of the bidirectional screw 2, and push the abutment plate 8 to move toward the positioning nut 5, completing the installation between the rear axle body 1 and the frame, thereby achieving the effect of facilitating tightening and installation.

[0027] Working principle: First, the user puts the nut seat 401 on the outside of the adjusting nut 6, and rotates the rotating cylinder 307, so that the rotating cylinder 307 drives the support rod 308 to rotate, and the support rod 308 drives the adjusting disk 306 to rotate, and the arc groove on the adjusting disk 306 pulls the slide bar 305 to move, and the slide bar 305 drives the sleeve 302 to move along the outside of the support plate 301, so that the sleeve 302 drives the insert block 304 on the pressure block 303 to insert into the slot of the abutment plate 8, so that the abutment plate 8 is fixed on the connection between the protective shell 7 and the bidirectional screw 2. The joint provides a seal for the adjusting nut 6 to prevent rainwater from entering, solving the problem that rainwater infiltration easily causes rust on the adjusting nut 6 and the bidirectional screw 2. Finally, the user holds the anti-slip sheath 402 on the outside of the protective shell 7 to drive the protective shell 7 to rotate, so that the nut seat 401 drives the adjusting nut 6 to rotate on the outside of the bidirectional screw 2, and the protective shell 7 pushes the abutment plate 8 to move toward the positioning nut 5, so that the positioning nut 5 and the abutment plate 8 clamp and fix the frame, thereby achieving the effect of safe sealing and easy disassembly and maintenance.

[0028] Example 2: Please refer to Figure 1-Figure 3 This embodiment further explains the first embodiment. The side of the abutment plate 8 shown in the figure away from the drum 307 extends to the outside of the protective shell 7. The opening of the protective shell 7 contacts the outside of the abutment plate 8, thereby improving the sealing performance of the abutment plate 8 to the protective shell 7.

[0029] In this embodiment, when the adjusting nut 6 pushes the butt plate 8 to move along the outer side of the bidirectional screw 2, the side of the butt plate 8 extending out of the protective shell 7 can be connected with the outer side of the frame, so that the bidirectional screw 2 and the rear axle body 1 can be installed on the frame through the butt plate 8 and the positioning nut 5, and the sealing performance of the protective shell 7 can be improved to prevent rainwater from seeping in.

[0030] Example 3: Please refer to Figure 3 and Figure 4 This embodiment further illustrates other embodiments. One end of the support plate 301 in the figure is fixedly connected to the limit block 9. A cavity is provided on the inner side of the sleeve 302 for the limit block 9 to slide in a limited manner to prevent the sleeve 302 from sliding off the support plate 301. An annular holder 10 is fixedly connected to the inner side of the protective shell 7 for the adjustment disk 306 to slide in a limited manner to improve the stability of the rotation of the adjustment disk 306.

[0031] In this embodiment: its purpose is that when the adjusting disk 306 rotates, it can rotate along the inner side of the annular holder 10, thereby improving the stability of the rotation of the adjusting disk 306, ensuring that each plug block 304 can be accurately inserted into the slot of the abutment plate 8, and the limit block 9 can make the sleeve 302 hang on the outer side of the support plate 301 to prevent the sleeve 302 from falling off the support plate 301.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bicycle flywheel rear axle, comprising a rear axle body (1) and a bidirectional screw (2) mounted inside the rear axle body (1), characterized in that: Also includes: Two positioning nuts (5) are symmetrically fixedly mounted on both ends of the bidirectional screw (2), the outer sides of the positioning nuts (5) are in contact with the end of the rear axle body (1), and adjusting nuts (6) are rotatably mounted on both ends of the bidirectional screw (2), a protective shell (7) is arranged on the outer side of the adjusting nut (6), and a stop plate (8) is arranged between the positioning nut (5) and the adjusting nut (6), and the stop plate (8) is located at the opening of the protective shell (7); A fixing clamping mechanism (3) is used for sealing and assembling the abutment plate (8), and the fixing clamping mechanism (3) is installed inside the protective shell (7); The tightening mechanism (4) is used to tighten or quickly disassemble the adjusting nut (6), and the tightening mechanism (4) is installed inside the protective shell (7).

2. A bicycle flywheel rear axle according to claim 1, characterized in that: The clamping mechanism (3) comprises six support plates (301) equidistantly distributed in an annular shape on the outside of the abutment plate (8); the support plates (301) are fixedly mounted on the inside of the protective shell (7); a sleeve (302) is slidably sleeved on the outside of the support plates (301); a pressure block (303) is fixedly connected to one end of the sleeve (302) away from the support plates (301); an insert block (304) is fixedly connected to one end of the pressure block (303) away from the sleeve (302); and a plug-in for limiting the insertion of the insert block (304) is provided on the outside of the abutment plate (8). A sliding rod (305) is fixedly connected to the outer side of the sleeve (302), an adjusting disk (306) is rotatably installed on the inner side of the protective shell (7), and an arc groove for limiting the sliding of the sliding rod (305) is opened on the surface of the adjusting disk (306), and a rotating cylinder (307) is rotatably installed on the end of the protective shell (7) away from the abutment plate (8), and the rotating cylinder (307) is movably sleeved on the outer side of the bidirectional screw (2), and a plurality of supporting rods (308) equidistantly distributed in an annular shape are fixedly connected between the rotating cylinder (307) and the adjusting disk (306).

3. A bicycle flywheel rear axle according to claim 2, characterized in that: The tightening mechanism (4) comprises a nut seat (401) fixedly mounted on the inner side of the protective shell (7); a nut groove for limiting the insertion of the adjusting nut (6) is provided on the outer side of the nut seat (401); a sliding cavity for limiting the sliding of the support rod (308) is provided on the surface of the nut seat (401); an anti-slip sleeve (402) is fixedly connected to the outer side of the protective shell (7); a plug ring (403) is fixedly connected to a side of the abutment plate (8) close to the adjusting nut (6); and an annular groove for limiting the insertion of the plug ring (403) is provided on the outer side of the adjusting nut (6).

4. The bicycle flywheel rear axle according to claim 2, characterized in that: A side of the abutment plate (8) away from the rotating drum (307) extends to the outside of the protective shell (7).

5. The bicycle flywheel rear axle according to claim 2, characterized in that: The opening of the protective shell (7) contacts the outer side of the abutment plate (8).

6. A bicycle flywheel rear axle according to claim 2, characterized in that: One end of the support plate (301) is fixedly connected to a limiting block (9), and a cavity is provided on the inner side of the sleeve (302) for the limiting block (9) to slide in a limited manner.

7. The bicycle flywheel rear axle according to claim 2, characterized in that: An annular clamping seat (10) for limiting the sliding movement of the adjusting disk (306) is fixedly connected to the inner side of the protective shell (7).

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