CN219687547U - Bicycle sprocket crank with fine tuning structure - Google Patents

Abstract

The utility model relates to the technical field of sprocket cranks, in particular to a bicycle sprocket crank with a fine adjustment structure, which comprises a sprocket main body, wherein a mounting plate is arranged on the front side of the sprocket main body, a movable plate is arranged on the right side of the mounting plate, a movable sleeve is arranged at the left end of the movable plate, a positioning mechanism is arranged on the inner side of the movable sleeve and close to the left side edge, the positioning mechanism comprises a sliding seat, an extrusion block and a second toothed plate, a fixing mechanism is arranged on the movable sleeve and positioned on the front side of the sliding seat, and the fixing mechanism comprises a fixing seat and a fixing block. According to the utility model, the positioning mechanism is arranged, and the sliding seat, the extrusion block and the second toothed plate are mutually matched, so that the extrusion block can apply pressure to the second toothed plate under the elastic action of the spring in the process of adjusting the movable plate, and the second toothed plate and the first toothed plate are continuously meshed, so that the movable sleeve can be positioned in the process of adjusting, and the stability of the movable plate in the process of adjusting is improved.

Description

Bicycle sprocket crank with fine tuning structure

Technical Field

The utility model relates to the technical field of sprocket cranks, in particular to a bicycle sprocket crank with a fine adjustment structure.

Background

The chain wheel crank is one of the important parts of bicycle and is mainly used for installing pedal parts, converting the acting force of pedal into rotating force and driving the rear wheel of bicycle to rotate via the chain wheel so as to make bicycle advance.

Among the prior art, chinese patent publication No. CN 214729435U's bicycle sprocket crank with fine setting structure has adopted "including the sprocket main part, install the connecting plate in the sprocket main part, connecting plate internally mounted has the regulating plate, be connected with the mounting panel on the regulating plate, set up on the connecting plate and dodge the groove, set up the removal groove on the connecting plate, remove the inside fastener that is used for carrying out clamp to the regulating plate of inslot, the cover is equipped with the scheme of stop piece" on the fastener, this scheme can finely tune the length of crank, is applicable to different crowds, the commonality when improving the use.

However, the above solution has some drawbacks in the use process, for example, when the length of the crank is fine-tuned, the positioning mechanism of the adjusting plate is lacking, in the adjustment process, the control effect on the length of the crank is poor, and the stability of the adjusting plate after adjustment is low, which affects the transmission of the crank, so we propose a bicycle sprocket crank with fine-tuning structure.

Disclosure of Invention

The present utility model is directed to a bicycle sprocket crank with a fine adjustment structure that solves the above-mentioned problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the bicycle sprocket crank with the fine adjustment structure comprises a sprocket main body, wherein a mounting plate is arranged on the front side of the sprocket main body, a movable plate is arranged on the right side of the mounting plate, a movable sleeve is arranged at the left end of the movable plate, a positioning mechanism is arranged on the inner side of the movable sleeve and close to the left side edge, and the positioning mechanism comprises a sliding seat, an extrusion block and a second toothed plate and is used for positioning the movable sleeve;

the movable sleeve is provided with a fixing mechanism at the front side of the sliding seat, and the fixing mechanism comprises a fixing seat and a fixing block and is used for limiting and fixing the extrusion block.

As the preferable technical scheme, the right-hand member of mounting panel is provided with the connection frame, the inboard of connection frame is provided with the first pinion rack of upper and lower symmetry, movable sleeve and connection frame sliding connection.

As the preferable technical scheme, the slide seat is arranged at the inner side of the movable sleeve and is close to the left end, the extrusion blocks are symmetrically arranged on the slide seat up and down and are in sliding connection with the slide seat, and a limiting ring is arranged on the extrusion blocks and positioned at the inner side of the slide seat.

As the preferable technical scheme, the second toothed plates are respectively arranged on the extrusion blocks at the upper side and the lower side, and the second toothed plates are connected with the first toothed plates in a meshed manner.

As a preferable technical scheme, a spring is arranged in the sliding seat and between the extrusion blocks positioned on the upper side and the lower side.

As the preferable technical scheme, the fixing base is arranged on the movable sleeve and is integrally formed with the movable sleeve, the fixing block is arranged on the inner side of the fixing base in a sliding manner and is matched with the sliding seat in a clamping manner, an adjusting screw is arranged on the fixing base and positioned on the front side of the fixing block, and the adjusting screw is rotationally connected with the fixing block.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the positioning mechanism is arranged, and the sliding seat, the extrusion block and the second toothed plate are mutually matched, so that the extrusion block can apply pressure to the second toothed plate under the elastic action of the spring in the process of adjusting the movable plate, and the second toothed plate and the first toothed plate are continuously meshed, so that the movable sleeve can be positioned in the process of adjusting, and the stability of the movable plate in the process of adjusting is improved.

2. According to the utility model, the fixing mechanism is arranged, after the movable plate is adjusted, the adjusting screw is rotated to drive the fixing block to move, the extrusion blocks on the upper side and the lower side can be limited and fixed through the fixing block, so that the second toothed plate is in close contact with the first toothed plate, the movable plate can be fixed, and the movable plate is prevented from moving to influence crank transmission.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a mounting plate according to the present utility model;

FIG. 3 is a schematic view of a moving plate structure according to the present utility model;

FIG. 4 is a schematic view of the internal structure of the movable sleeve according to the present utility model;

fig. 5 is a schematic diagram of a sliding seat according to the present utility model.

In the figure: 1. a sprocket body; 2. a mounting plate; 21. a connection frame; 22. a first toothed plate; 3. a movable plate; 31. a movable sleeve; 4. a slide; 41. extruding a block; 411. a limiting ring; 42. a second toothed plate; 43. a spring; 5. a fixing seat; 51. a fixed block; 52. and (5) adjusting the screw.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, the present utility model provides a technical solution:

the bicycle sprocket crank with fine tuning structure comprises a sprocket main body 1, wherein a mounting plate 2 is arranged on the front side of the sprocket main body 1, a movable plate 3 is arranged on the right side of the mounting plate 2, a movable sleeve 31 is arranged at the left end of the movable plate 3, and a positioning mechanism is arranged on the inner side of the movable sleeve 31 and close to the left side edge and comprises a sliding seat 4, a squeezing block 41 and a second toothed plate 42 and is used for positioning the movable sleeve 31;

a fixing mechanism is arranged on the movable sleeve 31 and positioned at the front side of the sliding seat 4, and the fixing mechanism comprises a fixing seat 5 and a fixing block 51 and is used for limiting and fixing the extrusion block 41.

It is to be added that the right-hand member of mounting panel 2 is provided with connecting frame 21, and connecting frame 21's inboard is provided with the first pinion rack 22 of upper and lower symmetry, and movable sleeve 31 and connecting frame 21 sliding connection can make fly leaf 3 remove on mounting panel 2 to finely tune the extension length of fly leaf 3, simultaneously, in the adjustment, connecting frame 21 and slide 4 mutually support, can prevent that movable sleeve 31 from breaking away from connecting frame 21.

As a preference of this embodiment, the sliding seat 4 is disposed at the inner side of the movable sleeve 31 and near the left end, the extrusion block 41 is disposed on the sliding seat 4 vertically symmetrically and is slidably connected with the sliding seat 4, and a limiting ring 411 is disposed on the extrusion block 41 and located at the inner side of the sliding seat 4, and the limiting ring 411 can prevent the extrusion block 41 from separating from the sliding seat 4.

It should be noted that the second toothed plate 42 is disposed on the pressing blocks 41 on the upper and lower sides, respectively, and the second toothed plate 42 is engaged with the first toothed plate 22.

As a preference of this embodiment, the spring 43 is disposed inside the slide 4 and between the pressing blocks 41 located on the upper and lower sides, and the spring 43 is elastically acted to move the pressing blocks 41, so that the pressing blocks 41 apply pressure to the second toothed plate 42, and the second toothed plate 42 and the first toothed plate 22 are engaged and connected, so that the movable sleeve 31 can be positioned in the adjustment process, and the stability of the movable plate 3 during adjustment is improved.

As a preferred embodiment, the fixed seat 5 is disposed on the movable sleeve 31 and integrally formed with the movable sleeve 31, the fixed block 51 is slidably disposed at the inner side of the fixed seat 5 and is engaged with the slide seat 4, the adjusting screw 52 is disposed on the fixed seat 5 and located at the front side of the fixed block 51, the adjusting screw 52 is rotatably connected with the fixed block 51, after the movable plate 3 is adjusted, the adjusting screw 52 is rotated to enable the adjusting screw 52 to move relative to the fixed seat 5, the adjusting screw 52 drives the fixed block 51 to slide at the inner side of the fixed seat 5, the fixed block 51 is engaged with the slide seat 4, and the squeeze blocks 41 at the upper side and the lower side are limited, so that the squeeze blocks 41 are prevented from sliding on the slide seat 4, and the second toothed plate 42 is tightly contacted with the first toothed plate 22, thereby fixing the movable plate 3.

When the bicycle sprocket crank with the fine adjustment structure is used, firstly, the movable plate 3 is pulled outwards, the movable plate 3 drives the movable sleeve 31 to move rightwards, the movable sleeve 31 slides on the connecting frame 21, meanwhile, the sliding seat 4 moves on the inner side of the connecting frame 21, the second toothed plate 42 is continuously contacted with the first toothed plate 22, the spring 43 is extruded, after the movable plate 3 stops moving, the spring 43 applies elastic acting force to the extrusion block 41, the extrusion block 41 drives the second toothed plate 42 to be close to the first toothed plate 22, the second toothed plate 42 is meshed with the first toothed plate 22, the movable sleeve 31 is positioned, and the movable sleeve 31 is prevented from moving randomly;

further, the adjusting screw 52 is rotated to enable the adjusting screw 52 to move relatively to the fixed seat 5, so that the adjusting screw 52 drives the fixed block 51 to slide on the inner side of the fixed seat 5, the fixed block 51 is clamped with the sliding seat 4, the extrusion blocks 41 on the upper side and the lower side are limited, the second toothed plate 42 is tightly contacted with the first toothed plate 22, and the movable plate 3 and the movable sleeve 31 are fixed.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. Bicycle sprocket crank with fine setting structure, including sprocket main part (1), its characterized in that: the chain wheel comprises a chain wheel main body (1), wherein a mounting plate (2) is arranged on the front side of the chain wheel main body (1), a movable plate (3) is arranged on the right side of the mounting plate (2), a movable sleeve (31) is arranged at the left end of the movable plate (3), a positioning mechanism is arranged on the inner side of the movable sleeve (31) and close to the left side edge, and the positioning mechanism comprises a sliding seat (4), an extrusion block (41) and a second toothed plate (42) and is used for positioning the movable sleeve (31);

the movable sleeve (31) is provided with a fixing mechanism which is positioned on the front side of the sliding seat (4), and the fixing mechanism comprises a fixing seat (5) and a fixing block (51) and is used for limiting and fixing the extrusion block (41).

2. A bicycle sprocket crank with fine tuning structure as set forth in claim 1, wherein: the right-hand member of mounting panel (2) is provided with connecting frame (21), the inboard of connecting frame (21) is provided with upper and lower symmetrical first pinion rack (22), movable sleeve (31) and connecting frame (21) sliding connection.

3. A bicycle sprocket crank with fine tuning structure as set forth in claim 1, wherein: the sliding seat (4) is arranged at the inner side of the movable sleeve (31) and is close to the left end, the extrusion blocks (41) are arranged on the sliding seat (4) in an up-down symmetrical mode and are in sliding connection with the sliding seat (4), and limiting rings (411) are arranged on the extrusion blocks (41) and are located at the inner side of the sliding seat (4).

4. A bicycle sprocket crank with fine tuning structure as set forth in claim 1, wherein: the second toothed plates (42) are respectively arranged on the extrusion blocks (41) at the upper side and the lower side, and the second toothed plates (42) are connected with the first toothed plates (22) in a meshed manner.

5. A bicycle sprocket crank with fine tuning structure as set forth in claim 1, wherein: a spring (43) is arranged inside the sliding seat (4) and between the extrusion blocks (41) positioned on the upper side and the lower side.

6. A bicycle sprocket crank with fine tuning structure as set forth in claim 1, wherein: the fixing seat (5) is arranged on the movable sleeve (31) and is integrally formed with the movable sleeve (31), the fixed block (51) is arranged on the inner side of the fixing seat (5) in a sliding mode and is matched with the sliding seat (4) in a clamping mode, an adjusting screw (52) is arranged on the fixing seat (5) and located on the front side of the fixed block (51), and the adjusting screw (52) is rotationally connected with the fixed block (51).