Bicycle middle axle clamping and locking assembly

Abstract

The utility model belongs to the technical field of bicycles, and discloses a bicycle center shaft clamping and locking assembly which comprises a seat tube, a sleeve is fixedly connected to the lower end of the seat tube, a center shaft is rotationally connected to the inner wall of the sleeve, a lock cylinder is rotationally connected to the outer end of the seat tube, a first gear is fixedly installed at one end of the lock cylinder, and a second gear is fixedly installed at the other end of the lock cylinder. A first gear is fixedly installed in the lock cylinder, a second gear is connected to the outer end of the first gear in a meshed mode, a threaded rod is fixedly installed at the bottom of the second gear, and a threaded pipe is connected to the lower side of the outer end of the threaded rod in a threaded mode. The clamping block below the concave block is connected with the clamping groove, so that the middle shaft of the bicycle is conveniently fixed, the purpose of locking the bicycle is achieved in a mode that the middle shaft cannot rotate, the bicycle locking device is safer and more convenient to lock, the whole set of components are in a sealed state, corrosion is reduced, impurities are prevented from entering the bicycle, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, and particularly relates to a central shaft locking assembly for a bicycle. Background Art

[0002] At present, most bicycles are locked by a lock fixed on the frame or a movable lock passing through the spokes of the front wheel or the rear wheel. These locks or chains are exposed outside for a long time, prone to rust, easy to freeze in winter, causing the spring to fail after a long time, the lock pin and the lock sleeve to jam, shortening the service life. Moreover, thieves can also separate the bicycle from the lock by sawing, cutting, smashing, prying and other means and steal the bicycle.

[0003] Therefore, a central shaft locking assembly for a bicycle is proposed to upgrade and transform on the basis of the device to solve these deficiencies. Content of the Utility Model

[0004] The purpose of the utility model is: to solve the problems in the background art, the utility model provides a central shaft locking assembly for a bicycle.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0006] A central shaft locking assembly for a bicycle, including a seat tube, a sleeve is fixedly connected to the lower end of the seat tube, a central shaft is rotatably connected to the inner wall of the sleeve, a lock core is rotatably connected to the outer end of the seat tube, a first gear is fixedly installed at one end of the lock core, a second gear is meshed and connected to the outer end of the first gear, a threaded rod is fixedly installed at the bottom of the second gear, a threaded tube is threadedly connected to the lower side of the outer end of the threaded rod, a connecting rod is slidably connected to the lower side of the inner wall of the threaded tube, a concave block is fixedly connected to the lower end of the connecting rod, a clamping block is fixedly connected to the bottom of the concave block, and a clamping groove for the outer end of the clamping block to be clamped is formed at the outer end of the central shaft.

[0007] Further, a retaining cover is rotatably connected to the outer end of the lock core.

[0008] Further, a fixing plate is fixedly connected to the inner wall of the seat tube, and the outer end of the threaded rod is rotatably connected to the inner wall of the fixing plate.

[0009] Further, a limiting block is fixedly connected to the outer end of the threaded tube, and a sliding groove for the outer end of the limiting block to slide is formed in the inner wall of the seat tube.

[0010] Further, a blocking block is fixedly connected to the upper end of the connecting rod, a spring is fixedly installed at the upper end of the blocking block, and one end of the spring is fixedly installed on the inner wall of the threaded tube.

[0011] Further, a seat rod is slidably connected to the inner wall of the seat tube, and a baffle is fixedly connected to the inner wall of the seat tube.

[0012] The beneficial effects of the present utility model are as follows:

[0013] By inserting the key into the lock core and rotating it, the first gear drives the second gear to rotate, the threaded rod drives the threaded tube to move downward, and the block under the concave block is connected to the card slot, facilitating the fixation of the bicycle bottom bracket, achieving the purpose of locking the bicycle by preventing the bottom bracket from rotating, which is safer and more convenient for locking. The whole set of components is in a sealed state, reducing corrosion, preventing foreign objects from entering, and having a longer service life.

[0014] Due to the action of the spring, even if the block is not engaged with the card slot, as long as the pedal is rotated randomly, the rotation of the bottom bracket drives the card slot to align with the block, and the block is squeezed into the interior of the card slot by the spring, fixing the bicycle bottom bracket, which is convenient for users to use. BRIEF 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 internal structure of the seat tube of the present utility model;

[0017] Figure 3 is a schematic diagram of the internal structure of the threaded tube of the present utility model.

[0018] Reference numerals: 1, seat tube; 11, lock core; 12, retaining cover; 13, seat post; 14, sleeve; 15, bottom bracket; 16, baffle; 17, first gear; 18, second gear; 19, fixing plate; 20, threaded rod; 21, limit block; 22, chute; 23, threaded tube; 24, connecting rod; 25, concave block; 26, block; 27, card slot; 28, spring; 29, stop block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] 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. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that like reference numerals and letters denote like 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 descriptive distinction and cannot be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is habitually placed during use. It is only for the convenience of describing the present invention 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 thus cannot be construed as a limitation to the present invention.

[0023] As Figures 1 to 3 shown, a bicycle bottom bracket locking assembly includes a seat tube 1. A sleeve 14 is fixedly connected to the lower end of the seat tube 1. A seat post 13 is slidably connected to the inner wall of the seat tube 1. A bottom bracket 15 is rotatably connected to the inner wall of the sleeve 14. A lock core 11 is rotatably connected to the outer end of the seat tube 1. A first gear 17 is fixedly installed at one end of the lock core 11. A second gear 18 is meshed with the outer end of the first gear 17. A threaded rod 20 is fixedly installed at the bottom of the second gear 18. A threaded tube 23 is threadedly connected to the lower side of the outer end of the threaded rod 20. A connecting rod 24 is slidably connected to the lower inner wall of the threaded tube 23. The lower end of the connecting rod 24 is fixedly connected to a concave block 25. A clamping block 26 is fixedly connected to the bottom of the concave block 25. A clamping groove 27 for the outer end of the clamping block 26 to be clamped is formed at the outer end of the bottom bracket 15. Specifically, by inserting a key into the lock core 11 and rotating it, the first gear 17 drives the second gear 18 to rotate, the threaded rod 20 drives the threaded tube 23 to move downward, and the clamping block 26 under the concave block 25 is connected to the clamping groove 27, facilitating the fixation of the bicycle bottom bracket and achieving the purpose of locking the bicycle by preventing the bottom bracket 15 from rotating.

[0024] As Figure 1 and Figure 2As shown, a retaining cover 12 is rotatably connected to the outer end of the lock core 11. A fixing plate 19 is fixedly connected to the inner wall of the seat tube 1. The inner wall of the fixing plate 19 is rotatably connected to the outer end of the threaded rod 20. A baffle 16 is fixedly connected to the inner wall of the seat tube 1. Specifically, it is convenient for the threaded tube 20 to rotate stably, and it is convenient to block the lock core 11 to prevent rainwater from entering the interior.

[0025] As Figure 1 and Figure 2 shown, a limit block 21 is fixedly connected to the outer end of the threaded tube 23. A sliding groove 22 for the outer end of the limit block 21 to slide is provided on the inner wall of the seat tube 1. Specifically, it is convenient for the threaded tube 23 to move stably.

[0026] As Figure 2 and Figure 3 shown, a retaining block 29 is fixedly connected to the upper end of the connecting rod 24. A spring 28 is fixedly installed on the upper end of the retaining block 29. One end of the spring 28 is fixedly installed on the inner wall of the threaded tube 23. Specifically, through the action of the spring 28, even if the clamping block 26 is not engaged with the clamping groove 27, as long as the pedal is rotated randomly, the central shaft 15 rotates to drive the clamping groove 27 to align with the clamping block 26, and the clamping block 26 is pushed into the interior of the clamping groove 27 by the spring 28 to fix the bicycle central shaft 15.

[0027] In summary: After the bicycle is used, when it is necessary to lock the bicycle, by inserting the key into the lock core 11 and rotating it, the first gear 17 drives the second gear 1 to rotate, the threaded rod 20 drives the threaded tube 23 to move downward, and the clamping block 26 under the concave block 25 is connected to the clamping groove 27, so as to fix the bicycle central shaft and achieve the purpose of locking the bicycle by making the central shaft 1 not rotatable;

[0028] Through the action of the spring 28, even if the clamping block 26 is not engaged with the clamping groove 27, as long as the pedal is rotated randomly, the central shaft 15 rotates to drive the clamping groove 27 to align with the clamping block 26, and the clamping block 26 is pushed into the interior of the clamping groove 27 by the spring 28 to fix the bicycle central shaft 15.

[0029] 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 required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bicycle middle axle locking assembly, comprising a seat tube (1), characterized in that: The lower end of the seat tube (1) is fixedly connected to a sleeve (14), the inner wall of the sleeve (14) is rotatably connected to a central axis (15), the outer end of the seat tube (1) is rotatably connected to a lock core (11), one end of the lock core (11) is fixedly mounted with a gear 1 (17), the outer end of the gear 1 (17) is meshingly connected with a gear 2 (18), a threaded rod (20) is fixedly mounted on the bottom of the gear 2 (18), the lower side of the outer end of the threaded rod (20) is threadedly connected to a threaded tube (23), the lower side of the inner wall of the threaded tube (23) is slidably connected to a connecting rod (24), the lower end of the connecting rod (24) is fixedly connected to a concave block (25), the bottom of the concave block (25) is fixedly connected to a clamping block (26), and the outer end of the central axis (15) is provided with a clamping groove (27) for clamping the outer end of the clamping block (26).

2. A bicycle middle axle locking assembly as claimed in claim 1, characterized in that: The outer end of the lock core (11) is rotatably connected to a blocking cover (12).

3. A bicycle middle axle locking assembly as claimed in claim 1, characterized in that: A fixing plate (19) is fixedly connected to the inner wall of the seat tube (1), and the inner wall of the fixing plate (19) is rotatably connected to the outer end of the threaded rod (20).

4. A bicycle middle axle locking assembly as claimed in claim 1, characterized in that: The outer end of the threaded tube (23) is fixedly connected to the limit block (21), and the inner wall of the seat tube (1) is provided with a sliding groove (22) for the outer end of the limit block (21) to be slidably connected.

5. A bicycle middle axle locking assembly as claimed in claim 1, characterized in that: The upper end of the connecting rod (24) is fixedly connected to a stopper (29), the upper end of the stopper (29) is fixedly mounted with a spring (28), and one end of the spring (28) is fixedly mounted to the inner wall of the threaded tube (23).

6. A bicycle middle axle locking assembly as claimed in claim 1, characterized in that: The inner wall of the seat tube (1) is slidably connected to a seat rod (13), and the inner wall of the seat tube (1) is fixedly connected to a baffle (16).

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