CN218967126U

CN218967126U - Chain tensioning structure

Info

Publication number: CN218967126U
Application number: CN202221960819.9U
Authority: CN
Inventors: 陈娟; 曹宝林; 解中振; 王静; 朱广星
Original assignee: Tianjin Beijiaqi Technology Development Co ltd
Current assignee: Tianjin Beijiaqi Technology Development Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2023-05-05
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a chain tensioning structure, which comprises a U-shaped mounting frame: the vertical end inner wall of mounting bracket is provided with the depressed part, and the inner wall of depressed part is provided with tensioning adjustment subassembly, and tensioning adjustment subassembly's both ends all are provided with the sprocket with bicycle chain engagement, through tensioning adjustment subassembly drive two sprocket synchronous reverse movement forces bicycle chain to be close to each other and tensioning or keep away from each other and lax, the outer wall of mounting bracket is provided with supporting component, and is provided with the holder of being connected with bicycle back frame on the supporting component. According to the chain tensioning structure, the rotation adjusting mode of the tensioning adjusting assembly is adopted, synchronous and reverse acting force can be exerted on the bicycle chain, so that the effect of double-side synchronous tensioning adjustment is achieved on the bicycle chain, the phenomenon of overlarge tensioning adjustment stroke caused by single-side tensioning adjustment of the bicycle chain is avoided, and the chain tensioning adjusting efficiency is improved.

Description

Chain tensioning structure

Technical Field

The utility model relates to the technical field of chain tensioning adjustment, in particular to a chain tensioning structure.

Background

In the daily running process of the bicycle, if the length of the chain is too long, the chain is in a loose state, the sudden chain falling condition is easy to occur, and therefore the dangerous conditions such as out-of-control and mistaken collision of the bicycle to pedestrians are likely to be caused, the chain falling of the bicycle is avoided to the greatest extent, and tensioning adjustment treatment is needed for the bicycle chain.

Chinese patent publication No.: CN215663845U discloses an automatic tensioner for bicycles, comprising a tensioner with a gear on the surface, a pressure sensor and a controller; the tensioning wheel is abutted against the chain and clamped with the chain, and the tensioning wheel is connected with the tensioning sleeve; the pressure sensor detects the force of the chain borne by the tensioning wheel, and the controller is used for controlling the tensioning wheel to move up and down according to the pressure fed back by the chain. The pressure sensor component is a common piezoelectric pressure sensor (diaphragm type), and the diaphragm type mainly comprises a body, a diaphragm and a piezoelectric element.

When the existing bicycle chain tensioning structure is tensioned and adjusted, a mode of tensioning after the chain is tensioned after the chain is pressed unidirectionally is adopted, when the bicycle chain needs to be tensioned in a small amplitude, the tensioning adjusting effect of the mode is good, but when the bicycle chain needs to be tensioned and adjusted in a large amplitude, the tensioning adjusting mode can press the chain to enable the chain to move in a large amplitude, the tensioning adjusting stroke is large, the phenomenon that the tensioning degrees of parallel ends at two sides of the chain wheel are inconsistent is caused easily, and the tensioning adjusting effect is reduced.

Disclosure of Invention

The utility model aims to provide a chain tensioning structure which shortens the tensioning adjustment stroke and improves the tensioning adjustment efficiency by adopting bilateral synchronous tensioning adjustment operation on a chain.

In order to achieve the above object, the present utility model provides the following technical solutions: a chain tensioning structure comprising a U-shaped mounting frame:

the inner wall of the vertical end of the mounting frame is provided with a concave part, the inner wall of the concave part is provided with a tensioning adjusting assembly, and the two ends of the tensioning adjusting assembly are provided with chain wheels meshed with a bicycle chain;

the tensioning adjusting assembly drives the two chain wheels to synchronously and reversely move, so that the bicycle chains are forced to be close to each other and tensioned or far away from each other and loosened;

the outer wall of mounting bracket is provided with supporting component, and is provided with the holder of being connected with the bicycle back frame on the supporting component.

As a further description of the above technical solution:

the tensioning adjusting assembly comprises a gear and two L-shaped tensioning frames, wherein the gear is rotatably connected to the mounting frame, racks are arranged at the vertical ends of the tensioning frames and are meshed with the gears, and the horizontal ends of the tensioning frames are rotatably connected with the chain wheels through bearings.

As a further description of the above technical solution:

the gear is provided with an adjusting groove.

As a further description of the above technical solution:

the axes of the chain wheel and the gear are positioned on the same vertical line.

As a further description of the above technical solution:

the locking assembly is also included;

the locking assembly comprises a screw tube arranged on the mounting frame, a screw rod is spirally connected in the screw tube, a toothed plate is rotatably connected to the bottom of the screw rod through a lantern ring, and the toothed plate is meshed with the gear.

As a further description of the above technical solution:

the supporting component comprises a sleeve arranged on the outer wall of the mounting frame, a supporting rod is movably connected in the sleeve, and a fastening pin which is abutted against the supporting rod is spirally connected on the sleeve.

As a further description of the above technical solution:

an L-shaped guard plate is embedded in the outer wall of the opening end of the mounting frame.

In the technical scheme, the chain tensioning structure provided by the utility model has the following beneficial effects:

this chain tensioning structure adopts the rotation regulation mode of tensioning adjustment subassembly, can play synchronous and reverse effort to bicycle chain for bicycle chain's both sides horizontal end can be close to each other, thereby plays the effect of bilateral synchronous tensioning regulation to bicycle chain, has avoided the unilateral tensioning of bicycle chain to adjust the too big phenomenon of tensioning adjustment stroke that leads to, has shortened the stroke of chain tensioning adjustment, has improved chain tensioning adjustment efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic view of a chain tensioning structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a chain tensioning structure according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a connection between a support assembly and a holder according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a tensioning adjustment assembly according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a locking assembly according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a mounting frame; 2. a support assembly; 21. a sleeve; 22. a fastening pin; 23. a support rod; 3. a clamping seat; 4. a sprocket; 5. a guard board; 6. a tension adjustment assembly; 61. a gear; 62. an adjustment tank; 63. a tensioning frame; 64. a bearing; 65. a rack; 7. a locking assembly; 71. a solenoid; 72. a screw; 73. a collar; 74. a toothed plate; 8. a concave portion.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, a chain tensioning structure includes a U-shaped mounting bracket 1:

the inner wall of the vertical end of the mounting frame 1 is provided with a concave part 8, the inner wall of the concave part 8 is provided with a tensioning adjusting component 6, the two ends of the tensioning adjusting component 6 are respectively provided with chain wheels 4 meshed with a bicycle chain, the number of the chain wheels 4 is two, the two chain wheels 4 are respectively positioned at the upper side and the lower side of two parallel ends of the bicycle chain, the bottom of the chain wheel 4 positioned above is meshed and connected with the top of the upper side of the bicycle chain, the bottom of the chain wheel 4 positioned below is meshed and connected with the bottom of the lower side of the bicycle chain, and the two parallel ends of the bicycle chain can be positioned between the two chain wheels 4;

the tensioning adjusting assembly 6 drives the two chain wheels 4 to synchronously and reversely move so as to force the bicycle chains to be close to each other and tensioned or far away from each other and loose, the tensioning adjusting assembly 6 is rotated so that the two chain wheels 4 are close to or far away from each other, and when the two chain wheels 4 are close to each other, synchronous and reverse acting force can be applied to the bicycle chains, so that the horizontal ends on the two sides of the bicycle chains can be close to each other, the effect of bilateral synchronous tensioning adjustment is achieved on the bicycle chains, the phenomenon of overlarge tensioning adjustment stroke caused by unilateral tensioning adjustment of the bicycle chains is avoided, the chain tensioning adjustment stroke is shortened, and the chain tensioning adjustment efficiency is improved;

the outer wall of mounting bracket 1 is provided with supporting component 2, and be provided with the cassette 3 of being connected with the frame behind the bicycle on supporting component 2, establish cassette 3 cover behind the bicycle on the frame to fix it behind the through-hole in the cassette 3 is run through to the bolt, improve the stability of mounting bracket 1 position, and change its whole length through removing supporting component 2, can adjust the interval size of mounting bracket 1 apart from the frame behind the bicycle, ensure that two sprockets 4 can correspond with the position of bicycle chain, and realize stable meshing connection effect.

The tensioning adjustment assembly 6 comprises a gear 61 and two L-shaped tensioning frames 63 which are rotatably connected to the mounting frame 1, racks 65 which are meshed with the gear 61 are arranged at the vertical ends of the tensioning frames 63, the horizontal ends of the tensioning frames 63 are rotatably connected with the chain wheels 4 through bearings 64, adjusting grooves 62 are formed in the gear 61, the adjusting grooves 62 are of a hexagonal structure, so that the adjusting grooves 62 can be matched with hexagonal wrenches, when the hexagonal wrenches are inserted into the adjusting grooves 62, force application places are provided for rotation of the gear 61, rotation operation of the gear 61 is facilitated, the chain wheels 4 and the axle center of the gear 61 are located on the same vertical line, when the hexagonal wrenches are inserted into the adjusting grooves 62, the gear 61 is meshed with racks 65 on the tensioning frames 63, so that the horizontal ends of the two tensioning frames 63 are driven to move synchronously, the two chain wheels 4 are driven to synchronously approach each other, the two parallel ends of the two chain wheels 4 are pressed to approach each other, the two chain tensioning adjustment operations can be achieved, the two chain tensioning adjustment effects of the bicycle chain can be achieved, the chain tensioning adjustment can be achieved, and the chain tensioning adjustment can be achieved on the bicycle, and the chain can be shortened, and the chain can be adjusted in a double-side mode.

The locking assembly 7 comprises a screw tube 71 arranged on the mounting frame 1, a screw rod 72 is spirally connected in the screw tube 71, the bottom of the screw rod 72 is rotatably connected with a toothed plate 74 through a lantern ring 73, the toothed plate 74 is meshed and connected with the gear 61, when the gear 61 is required to be rotated to tension and adjust a bicycle chain, the toothed plate 74 is driven to move upwards to be separated from the gear 61 at the moment, the unlocking effect can be achieved on the gear 61, otherwise, when the gear 61 is not required to be rotated, the toothed plate 74 is moved out of the screw tube 71, the toothed plate 74 is meshed and connected with the gear 61, the locking effect can be achieved on the gear 61, and the locking and reinforcing effects can be achieved on the tensioning positions of the two chain wheels 4.

The supporting component 2 is including setting up the sleeve pipe 21 at the mounting bracket 1 outer wall, swing joint has branch 23 in the sleeve pipe 21, screwed connection has the binding pin 22 that contradicts with branch 23 on the sleeve pipe 21, make it remove in sleeve pipe 21 through pull branch 23, can adjust the whole length of supporting component 2, rotate binding pin 22 and make it contact with branch 23 and support tightly, improve the stability in branch 23 position, and then adjust the interval size of frame behind the mounting bracket 1 apart from the bicycle, ensure that two sprockets 4 can correspond with the position of bicycle chain, and realize stable meshing connection effect.

The outer wall of the opening end of the mounting frame 1 is embedded with an L-shaped guard plate 5, so that the guard plate 5 can seal and close the opening end of the mounting frame 1, and the chain wheel 4 and the bicycle chain are hidden and protected.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims

1. Chain tensioning arrangement, comprising a mounting bracket (1) of U-shape, characterized in that:

the inner wall of the vertical end of the mounting frame (1) is provided with a concave part (8), the inner wall of the concave part (8) is provided with a tensioning adjusting component (6), and the two ends of the tensioning adjusting component (6) are respectively provided with a chain wheel (4) meshed with a bicycle chain;

the tensioning adjusting assembly (6) drives the two chain wheels (4) to synchronously and reversely move, so that the bicycle chains are forced to be close to each other and tensioned or far away from each other and loosened;

the outer wall of the mounting frame (1) is provided with a supporting component (2), and the supporting component (2) is provided with a clamping seat (3) connected with the rear frame of the bicycle.

2. A chain tensioning structure as set forth in claim 1, wherein: the tensioning adjusting assembly (6) comprises a gear (61) and two L-shaped tensioning frames (63) which are rotatably connected to the mounting frame (1), a rack (65) which is meshed with the gear (61) is arranged at the vertical end of each tensioning frame (63), and the horizontal end of each tensioning frame (63) is rotatably connected with the sprocket (4) through a bearing (64).

3. A chain tensioning structure as set forth in claim 2, wherein: an adjusting groove (62) is formed in the gear (61).

4. A chain tensioning structure as set forth in claim 2, wherein: the axes of the chain wheel (4) and the gear (61) are positioned on the same vertical line.

5. A chain tensioning structure as set forth in claim 1, wherein: also comprises a locking assembly (7);

the locking assembly (7) comprises a screw tube (71) arranged on the mounting frame (1), a screw rod (72) is spirally connected in the screw tube (71), a toothed plate (74) is rotatably connected to the bottom of the screw rod (72) through a collar (73), and the toothed plate (74) is meshed with the gear (61).

6. A chain tensioning structure as set forth in claim 1, wherein: the supporting component (2) comprises a sleeve (21) arranged on the outer wall of the mounting frame (1), a supporting rod (23) is movably connected in the sleeve (21), and a fastening pin (22) which is in interference with the supporting rod (23) is spirally connected on the sleeve (21).

7. A chain tensioning structure as set forth in claim 1, wherein: an L-shaped guard plate (5) is embedded on the outer wall of the opening end of the mounting frame (1).