Bicycle head locking and rotating limiting mechanism and electric bicycle frame

Abstract

The bicycle head locking and rotating limiting mechanism comprises a front fork, a front fork vertical pipe, a limiting plate and a bicycle head lock, a main pipe on the upper portion of the front fork is rotationally arranged in the front fork vertical pipe in a sleeved mode, the limiting plate is fixedly arranged under the rear side of the front fork vertical pipe, two limiting grooves are formed in the rear side of the upper portion of a fork shoulder of the front fork, and the bicycle head lock is arranged in the limiting grooves. The lower portion of the limiting plate abuts against the interior of the corresponding limiting groove, continuous rightward or leftward rotation stopping of the front fork is achieved, and continuous rightward or leftward rotation stopping of the front fork is achieved through rotation stopping of the limiting plate on a spring bolt extending out of the bicycle head lock. According to the limiting mechanism, under the condition that steering safety limiting and steering locking are achieved, the lightweight design of the fork shoulder is achieved, and the machining efficiency of the electric bicycle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycle processing, in particular to a headstock locking and rotation limiting mechanism and an electric bicycle frame. Background Art

[0002] Due to the convenience of driving and a certain cruising range, electric bicycles are widely used as short-distance travel vehicles. Generally, two protruding limit posts are provided on the fork shoulders of the front forks of existing electric bicycles. By using the interference between the limit posts and the limit blocks fixedly arranged on the front fork riser, the transitional steering of the front wheels of the electric bicycle is realized, and then the driving safety of the electric bicycle is improved. However, setting protruding limit posts on the fork shoulders is not conducive to realizing the lightweight design of the fork shoulders; further, the front wheel steering locking function and the vehicle power-on function of existing electric bicycles are integrated on a single handlebar lock. In this way, when realizing the front wheel steering locking, corresponding grooves need to be opened on the front fork riser and the upper main pipe of the front fork, resulting in a relatively complex structure for realizing the front wheel steering locking function and being not conducive to improving the processing efficiency of electric bicycles. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a headstock locking and rotation limiting mechanism and an electric bicycle frame. Under the condition of ensuring the realization of steering safety limiting and steering locking, at the same time, the lightweight design of the fork shoulders is realized and it is conducive to improving the processing efficiency of electric bicycles.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a headstock locking and rotation limiting mechanism, including a front fork, a front fork riser, a limit plate, and a headstock lock. The main pipe at the upper part of the front fork is rotatably sleeved in the front fork riser. The limit plate is fixedly arranged directly below the rear side of the front fork riser. Two limit grooves are provided at the rear side of the upper part of the fork shoulder of the front fork. By pressing the lower part of the limit plate against the corresponding limit groove, the continuous rightward or leftward rotation of the front fork is blocked. By blocking the rotation of the lock tongue protruding from the headstock lock by the limit plate, the continuous rightward or leftward rotation of the front fork is blocked.

[0005] Preferably, the limit plate is an integrally stamped component.

[0006] Further, the limit plate includes an upper arc portion and a lower arc portion. The upper arc portion is fixedly connected to the lower part of the rear side of the front fork riser by welding. The lower part of the lower arc portion is located at the rear side of the upper part of the fork shoulder, and the horizontal height of the bottom surface of the lower arc portion is between the upper horizontal height and the lower horizontal height of the limit groove.

[0007] Further, a ∩-shaped groove is fixedly arranged directly behind the fork shoulder, the front head lock is arranged in the ∩-shaped groove, a through hole corresponding to the lock tongue of the front head lock is arranged on the upper side wall of the ∩-shaped groove, and the lock tongue can extend out from the through hole.

[0008] Further, the ∩-shaped groove is fixedly connected to the fork shoulder by welding, the lock body of the front head lock is fixedly connected to the ∩-shaped groove by welding, the horizontal height of the upper plane of the extended lock tongue is 3 mm greater than the horizontal height of the bottom surface of the lower arc portion, and the horizontal height of the upper plane of the retracted lock tongue is lower than the horizontal height of the bottom surface of the lower arc portion.

[0009] An electric bicycle frame includes the above-mentioned front head lock and rotation limit mechanism.

[0010] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and convenient for processing and manufacturing; in practical applications, when the rotation limit groove presses against the lower part of the lower arc portion, the rotation limit of the front fork is realized, and then the steering safety limit is realized, improving the driving safety of the electric bicycle. At the same time, through the structural design of the limit groove, the light weight design of the fork shoulder is realized; in practical applications, when the front fork is rotated by a certain angle, it is convenient for the lock tongue to extend. After the lock tongue extends, when the front fork is rotated again, due to the blocking effect of the limit plate on the lock tongue, the front fork cannot continue to rotate, thus realizing the steering lock of the electric bicycle and improving the anti-theft safety of the electric bicycle; the limit plate adopts a one-time stamping forming technology, which has high processing efficiency and is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are partial preferred embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 It is a schematic diagram of the state where the front fork is locked by the front head lock;

[0014] In the figure: 11 main pipe, 12 fork shoulder, 121 limit groove, 2 front fork riser, 3 limit plate, 31 upper arc portion, 32 lower arc portion, 4 ∩-shaped groove, 5 front head lock, 51 lock tongue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will be combined with specific embodiments and attached Figure 1-2, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. Those skilled in the art can make similar deformations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0016] The present invention provides a front head locking and rotation limiting mechanism (as shown in Figure 1 and Figure 2 ), including a front fork, a front fork riser 2, a limit plate 3, and a front head lock 5. The front fork is a steering execution mechanism of an existing electric bicycle, which is an existing mature technology. Therefore, the structural composition of the front fork will not be described in detail. The front fork riser 2 is a structure at the front of the frame, which mainly realizes the stable connection between the front fork and the frame body. The front head lock 5 is also a mature technology product in the existing market. The main pipe 11 at the upper part of the front fork is rotatably sleeved in the front fork riser 2. In actual application, by turning the handlebar, the main pipe 11 is driven to rotate freely in the front fork riser 2. The front wheel is arranged at the lower part of the front fork, and the front wheel is steered by turning the handlebar. The limit plate 3 is fixedly arranged directly below the rear side of the front fork riser 2. There are two limit grooves 121 at the upper rear side of the fork shoulder 12 of the front fork. By pressing the lower part of the limit plate 3 against the corresponding limit groove 121, the continuous rotation of the front fork to the right or left is blocked. That is, when the front fork is in the straightening direction, at this time, the running electric bicycle goes straight. The two limit grooves 121 are symmetrically distributed on both sides of the lower part of the limit plate 3. When the front fork rotates, the limit groove 121 rotates with the front fork. When the limit groove 121 presses against the lower part of the limit plate 3, the rotation of the fork shoulder 12 is limited, and then the rotation of the front fork is limited. By reasonably designing the relative positions of the limit groove 121 and the limit plate 3, the front fork can be prevented from rotating at too large an angle in some accidental situations, thereby improving the steering safety of the electric bicycle. By using the limit plate 3 to block the rotation of the locking tongue 51 extended by the front head lock 5, the continuous rotation of the front fork to the right or left is blocked. In actual application, when the front head lock 5 is not in use, the locking tongue 51 is in the retracted state, so it will not interfere with the limit plate 3, and thus it will not affect the normal rotation of the front fork. When the front fork is at a certain steering angle, the locking tongue 51 can extend. After the locking tongue 51 extends, it will interfere with the limit plate 3 during rotation, so that the limit plate 3 is located between a limit groove 121 and the locking tongue 51, realizing the normal rotation limit of the front fork, and then realizing the front head steering locking function.

[0017] In the above embodiment, the limit plate 3 can be used to achieve both steering safety limit and steering lock, thereby realizing the dual functions of the limit plate 3, thereby simplifying the structural design of the electric bicycle; at the same time, two limit grooves 121 are set on the fork shoulder 12, which is conducive to the lightweight design of the fork shoulder 12.

[0018] On the basis of the above embodiment, in order to simplify the processing and manufacturing process of the limit plate 3, the limit plate 3 is an integral stamping component. Further, in order to facilitate the upper part of the limit plate 3 to be smoothly combined with the side wall of the front fork stem 2, and at the same time, the lower part of the limit plate 3 can effectively cooperate with the limit groove 121, the limit plate 3 includes an upper arc portion 31 and a lower arc portion 32. The upper arc portion 31 is fixedly connected to the rear lower part of the front fork stem 2 by welding, and the lower part of the lower arc portion 32 is located at the rear side of the upper part of the fork shoulder 12, and the bottom surface level of the lower arc portion 32 is located between the upper level of the limit groove 121 and the bottom level of the limit groove 121. Through the above design of the level of the bottom surface of the lower arc portion 32, it can be ensured that the bottom of the lower arc portion 32 can slide smoothly into the limit groove 12, and at the same time, the rotation limit of the limit groove 121 is also achieved.

[0019] On the basis of the above-mentioned embodiment, the specific implementation method of the front lock 5 on the fork shoulder 12 is as follows: a ∩-shaped groove 4 is fixedly provided directly behind the fork shoulder 12, the front lock 5 is provided in the ∩-shaped groove 4, and a through hole corresponding to the locking tongue 51 of the front lock 5 is provided on the upper side wall of the ∩-shaped groove 4, and the locking tongue 51 can extend out of the through hole. In actual application, when the front fork is in the straightening state, the lock tongue 51 in the retracted state is directly below the lower arc-shaped portion 32. At this time, the lock tongue 51 cannot be extended by turning the lock core of the front lock 5 with the key. When the front fork is rotated by a certain angle, the lock tongue 51 is separated from the bottom of the lower arc-shaped portion 32. At this time, the lock tongue 51 is extended by turning the lock core of the front lock 5 with the key. When the lock tongue 51 is extended into place, when the front fork is rotated again, the front fork cannot be rotated smoothly and normally due to the blocking effect of the limiting groove 121 and the lock tongue 51 on the lower arc-shaped portion 32, thereby realizing the steering locking function of the front fork.

[0020] In order to prevent the ∩-shaped groove 4 or the front lock 5 from being easily removed, the ∩-shaped groove 4 is fixedly connected to the fork shoulder 12 by welding, and the lock body of the front lock 5 is fixedly connected to the ∩-shaped groove 4 by welding. In order to smoothly achieve the locking and releasing of the front fork steering by the front lock 5, the horizontal height of the upper plane of the extended locking tongue 51 is 3 mm greater than the horizontal height of the bottom surface of the lower arc-shaped portion 32, and the horizontal height of the upper plane of the retracted locking tongue 51 is lower than the horizontal height of the bottom surface of the lower arc-shaped portion 32.

[0021] The present utility model also provides an electric bicycle frame, which includes a front head locking and rotation limiting mechanism as described above.

[0022] In the present utility model, "upper", "lower", "front", "rear", "left" and "right" are relative positions used for conveniently describing the positional relationship, and thus cannot be understood as absolute positions to limit the protection scope.

[0023] Except for the technical features described in the specification, they are all known technologies to those skilled in the art.

[0024] The preferred embodiments and examples of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments and examples. For those of ordinary skill in the art in this technical field, without departing from the concept of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A front headstock locking and rotation limiting mechanism, comprising a front fork and a front fork riser. The main pipe at the upper part of the front fork is rotatably sleeved in the front fork riser. It is characterized in that, The limiting mechanism further includes a limiting plate and a headstock lock. The limiting plate is fixedly arranged directly below the rear side of the front fork riser. Two limiting grooves are arranged on the rear side of the upper part of the fork shoulder of the front fork. By pressing the lower part of the limiting plate against the corresponding limiting groove, the continuous rightward or leftward rotation of the front fork is blocked. By blocking the rotation of the locking tongue protruding from the headstock lock with the limiting plate, the continuous rightward or leftward rotation of the front fork is also blocked.

2. The headstock locking and rotation limiting mechanism according to claim 1, characterized in that The limiting plate is an integrally stamping formed part.

3. The headstock locking and rotation limiting mechanism according to claim 2, characterized in that, The limiting plate includes an upper arc portion and a lower arc portion. The upper arc portion is fixedly connected to the lower part of the rear side of the front fork riser by welding. The lower part of the lower arc portion is located at the rear side of the upper part of the fork shoulder, and the horizontal height of the bottom surface of the lower arc portion is between the upper horizontal height and the bottom horizontal height of the limiting groove.

4. The headstock locking and rotation limiting mechanism according to claim 3, characterized in that, A ∩-shaped groove is fixedly arranged directly behind the fork shoulder. The headstock lock is arranged in the ∩-shaped groove. A through hole corresponding to the locking tongue of the headstock lock is arranged on the upper side wall of the ∩-shaped groove, and the locking tongue can protrude from the through hole.

5. A front headstock locking and rotation limiting mechanism according to claim 4, characterized in that, The ∩-shaped groove is fixedly connected to the fork shoulder by welding. The lock body of the headstock lock is fixedly connected to the ∩-shaped groove by welding. The horizontal height of the upper plane of the protruding locking tongue is 3 mm larger than the horizontal height of the bottom surface of the lower arc portion. The horizontal height of the upper plane of the retracted locking tongue is lower than the horizontal height of the bottom surface of the lower arc portion.

6. An electric bicycle frame, characterized in that, It includes a headstock locking and rotation limiting mechanism according to claim 5.

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