CN214776389U

CN214776389U - Left wrist band and auxiliary mounting tool thereof

Info

Publication number: CN214776389U
Application number: CN202023028139.7U
Authority: CN
Inventors: 王平; 刘红颜
Original assignee: Changzhou Tuoke Intelligent Technology Co ltd
Current assignee: Changzhou Tuoke Intelligent Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-11-19
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a left wrist band, which comprises a first component sleeved at the left end of a middle shaft body in a five-way pipe and used for limiting the middle shaft body; the second assembly is in threaded connection with the inside of the five-way pipe, the end face of the right side of the second assembly is in contact with the end face of the left side of the first assembly, and the left end of the second assembly is used for assisting the middle shaft body to be fixed in the five-way pipe; and the third assembly is in threaded connection with the periphery of the second assembly and used for locking the bottom bracket body in the five-way pipe. The utility model aims at overcoming the defect that prior art exists, provide one kind and can avoid bringing the inside axis of five-way pipe because of the five-way pipe size difference and appear rocking left wrist band and supplementary mounting tool thereof.

Description

Left wrist band and auxiliary mounting tool thereof

Technical Field

The utility model relates to an electric bicycle produces the processing field, especially relates to a left wrist band and supplementary mounting tool thereof.

Background

Electric bicycles are increasingly popularized and applied in China due to their characteristics of lightness, rapidness, labor saving, no pollution and the like. The middle shaft is used as a core component of the electric bicycle and is used for driving and controlling the whole bicycle to normally run. At present, a conventional middle shaft comprises a middle shaft main body, and a left wrist guard and a right wrist guard which are fixedly arranged on the auxiliary middle shaft main body and a five-way pipe. Because the five-way pipe size that different producers produced is different, this has just caused the axis main part of installing in the five-way pipe to appear rocking, and specific reason is as follows:

1. if the five-way pipe is too short, the right wrist guard cannot be locked in place after installation, and the size of the whole vehicle chain line is changed.

2. If the five-way pipe is too long, the left and right threads are locked in place after installation, but the axle can radially float, and the riding effect is not good.

Therefore, it is necessary to design a left wrist band and an auxiliary mounting tool thereof, which can avoid the shaking of the middle shaft in the five-way pipe caused by the different sizes of the five-way pipe.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, provide one kind and can avoid bringing the inside axis of five-way pipe because of the five-way pipe size difference and appear rocking left wrist band and supplementary mounting tool thereof.

Realize the utility model discloses the technical scheme of purpose is: a left wrist band comprises a first component which is sleeved at the left end of a middle shaft body in a five-way pipe and limits the middle shaft body;

the second assembly is in threaded connection with the inside of the five-way pipe, the end face of the right side of the second assembly is in contact with the end face of the left side of the first assembly, and the left end of the second assembly is used for assisting the middle shaft body to be fixed in the five-way pipe;

and the third assembly is in threaded connection with the periphery of the second assembly and used for locking the bottom bracket body in the five-way pipe.

Further, the first assembly is internally provided with spline grooves; a first thread is arranged on the periphery of the right end of the first assembly; the maximum outer diameter of the first threads is larger than the outer diameter of the left end unthreaded part of the first assembly, and the outer diameter of the left end unthreaded part of the first assembly is smaller than the inner diameter of the inner threads of the five-way pipe.

Furthermore, a flange is integrally formed on the inner periphery of the left end of the second component; a through hole is formed in the center of the flange; the inner periphery of the second assembly on the right side of the flange is provided with a bearing wrist; an inner spline is arranged on the inner periphery of the second assembly on the left side of the flange; a second thread is disposed on an outer periphery of the second component.

Further, a third thread is arranged on the inner periphery of the third assembly, and the third assembly is in threaded connection with the second assembly through the third thread.

Further, an auxiliary spline is arranged on the outer periphery of the third component.

An auxiliary mounting tool comprises a first body, a second body formed by the first body extending forwards, and a third body formed by the second body extending forwards; a limiting flange is formed at the junction of the first main body and the second main body by radial difference; the periphery of the third main body is provided with an external spline; the external spline is bonded with the spline groove on the inner periphery of the first assembly; the inner periphery of the first main body is provided with an auxiliary groove.

Further, the outer diameter of the limiting flange is larger than the inner diameter of the five-way pipe.

Further, the outer diameter of the second main body is the same as that of the left end of the first component without threads.

Further, the third body has an axial thickness > the first component axial thickness.

Further, the auxiliary groove is a polygonal groove body, and more specifically, may be a triangle, a quadrangle, a pentagon or a hexagon.

After the technical scheme is adopted, the utility model discloses following positive effect has: the utility model discloses a left wrist band is updated by the integral type and is split type, and this left wrist band structure has solved the problem of the axle radial float after the different brings axis body installation of different producer five-way pipe sizes, and simple structure and practicality are strong.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a first angle perspective dispersion view of the left wrist band of the present invention;

fig. 2 is a second angle perspective view of the left wrist band of the present invention;

FIG. 3 is a perspective view of the auxiliary mounting tool of the present invention;

FIG. 4 is a top view of the auxiliary installation tool of the present invention;

fig. 5 is a dispersion view of the left wrist band of the present invention.

The reference numbers in the drawings are as follows: the bearing comprises a main body rib 00, a protrusion 01, a first component 10, a spline groove 11, a first thread 12, a second component 20, a rib 21, a through hole 22, a second thread 23, an internal spline 24, a bearing wrist 25, a third component 30, a third thread 31, an auxiliary spline 32, a first main body 40, a limiting rib 41, an auxiliary groove 42, a second main body 50, a third main body 60 and an external spline 61.

Detailed Description

Referring to fig. 1 and 2, the left wrist band comprises a first assembly 10 which is sleeved at the left end of a middle shaft body in a five-way pipe and used for radially and axially limiting the middle shaft body, wherein the radial limiting refers to rotation around an axis;

the second assembly 20 is in threaded connection with the inside of the five-way pipe, the end face of the right side of the second assembly is in contact with the end face of the left side of the first assembly 10, and the left end of the second assembly is used for assisting the middle shaft body to be fixed in the five-way pipe;

and a third assembly 30 which is screwed on the periphery of the second assembly 20 and is used for locking the bottom bracket body in the five-way pipe.

In the embodiment, more specifically, the first assembly 10 is provided with spline grooves 11 in inner circumference for spline-bonding with the outer circumference of the left end of the bottom bracket body; a first thread 12 is arranged on the periphery of the right end of the first component 10; the maximum outer diameter of the first thread 12 is larger than the outer diameter of the left end unthreaded part of the first component 10, and the outer diameter of the left end unthreaded part of the first component 10 is smaller than the inner diameter of the inner thread of the five-way pipe. This facilitates the screwing of the first assembly 10 into the five-way tube.

In the embodiment, more specifically, the inner periphery of the left end of the second component 20 is integrally formed with a rib 21; a through hole 22 is formed in the center of the flange 21, and the through hole 22 allows a middle shaft at the left end of the middle shaft main body to pass through; a bearing wrist 25 is arranged on the inner periphery of the second assembly 20 on the right side of the flange 21; the inner circumference of the second component 20 at the left side of the flange 21 is provided with an internal spline 24, and the arrangement of the internal spline 24 is convenient for screwing the second component 20 into a five-way pipe by means of a tool; the second component 20 is arranged with a second thread 23 on its outer circumference.

In the present embodiment, more specifically, the third assembly 30 is provided with a third thread 31 on the inner circumference, and the third assembly 30 is screwed with the second assembly 20 through the third thread 31.

In the present embodiment, more specifically, the third component 30 is provided with an auxiliary spline 32 on its outer periphery, and the auxiliary spline 32 is provided to facilitate the locking operation between the third component 30 and the five-way pipe by means of a wrench.

Referring to fig. 3 and 4, an auxiliary wrist band fitting tool includes a first body 40, a second body 50 formed by extending the first body 40 forward, and a third body 60 formed by extending the second body 50 forward; the junction of the first main body 40 and the second main body 50 forms a limit rib 41 by radial difference; the outer periphery of the third body 60 is provided with a circumscribed spline 61; the external spline 61 is bonded with the spline groove 11 on the inner periphery of the first component 10; the first body 40 has an auxiliary groove 42 formed on an inner circumference thereof.

In this embodiment, more specifically, the outer diameter of the limiting rib 41 is larger than the inner diameter of the five-way pipe, and the limiting rib 41 is arranged to limit the depth of the first assembly 10 entering the five-way pipe; in the actual use process, the position of the limiting rib 41 in the axial direction can be properly adjusted according to the actual size of the five-way pipe, so that limiting at different depths is realized.

In this embodiment, more specifically, the outer diameter of the second body 50 is the same as the outer diameter of the left end of the first component 10 where the threads are not provided.

More specifically in this embodiment, the axial thickness of the third body 60 > the axial thickness of the first component 10.

In the present embodiment, the auxiliary groove 42 is a polygonal groove body, and more specifically, may be a triangle, a quadrangle, a pentagon or a hexagon, and mainly functions to prevent the auxiliary installation tool from being displaced relative to the external installation tool in the circumferential direction.

The utility model discloses a theory of operation does: see fig. 5, in operation, the first step: sleeving the first assembly 10 on the periphery of the third main body 60 of the auxiliary installation tool and enabling the left end of the first assembly 10 to be in surface contact with the right end face of the second main body 50; the second step is that: inserting an external tool into the auxiliary groove 42, screwing the first assembly 10 into the five-way pipe by an auxiliary mounting tool, wherein the screwing depth is only required to be that the limiting flange 41 is contacted with the end face of the five-way pipe; the third step: putting the middle shaft main body into the five-way pipe, clamping a plurality of protrusions 01 on the outer periphery of the middle shaft main body with a spline 11 on the inner periphery of the first assembly 10, continuously pushing the middle shaft main body along the axial direction, enabling the middle shaft to penetrate through the through hole 22 until a bearing sleeved on the middle shaft main body falls into the bearing wrist 25 and the main body flange 00 contacts with the end face on the right side of the first assembly 10; the fourth step: screwing the second assembly 20 into the five-way tube by means of an external tool until the right end of the second assembly 20 comes into contact with the left end of the first assembly 10; the fifth step: and (3) connecting the third component 30 with the second component 20 reserved outside the five-way pipe in a threaded mode, and screwing until the middle shaft main body is fixedly installed. The protrusion 01 and the body rib 00 are both present on a common bottom bracket body and will not be described in more detail.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A left wrist band, its characterized in that: comprises that

The first component (10) is sleeved at the left end of the middle shaft body in the five-way pipe and used for limiting the middle shaft body;

the second assembly (20) is in threaded connection with the inside of the five-way pipe, the right end face of the second assembly is in contact with the left end face of the first assembly (10), and the left end of the second assembly is used for assisting the middle shaft body to be fixed in the five-way pipe;

and the third assembly (30) is screwed on the periphery of the second assembly (20) and is used for locking the bottom bracket body in the five-way pipe.

2. The left wrist brace according to claim 1, wherein: the inner periphery of the first component (10) is provided with spline grooves (11); the periphery of the right end of the first component (10) is provided with a first thread (12); the maximum outer diameter of the first thread (12) is larger than the outer diameter of the left end unthreaded part of the first component (10), and the outer diameter of the left end unthreaded part of the first component (10) is smaller than the inner diameter of the inner thread of the five-way pipe.

3. The left wrist brace according to claim 2, wherein: a flange (21) is integrally formed on the inner periphery of the left end of the second component (20); a through hole (22) is formed in the center of the flange (21); the inner periphery of the second component (20) on the right side of the flange (21) is provided with a bearing wrist (25); the inner circumference of the second component (20) on the left side of the flange (21) is provided with an internal spline (24); the second component (20) is arranged with a second thread (23) on its outer circumference.

4. The left wrist brace according to claim 3, wherein: the inner periphery of the third component (30) is provided with a third thread (31), and the third component (30) is in threaded connection with the second component (20) through the third thread (31).

5. The left wrist brace according to claim 4, wherein: the outer periphery of the third component (30) is provided with an auxiliary spline (32).

6. An auxiliary fitting tool for a left cuff as defined in any one of claims 1 to 5, wherein: comprises a first body (40), a second body (50) formed by the forward extension of the first body (40) and a third body (60) formed by the forward extension of the second body (50); a limiting rib (41) is formed at the junction of the first main body (40) and the second main body (50) by radial difference; the outer periphery of the third main body (60) is provided with a circumscribed spline (61); the external spline (61) is bonded with a spline groove (11) on the inner periphery of the first assembly (10); the inner periphery of the first main body (40) is provided with an auxiliary groove (42).

7. The auxiliary installation tool of claim 6, wherein: the outer diameter of the limiting flange (41) is larger than the inner diameter of the five-way pipe.

8. The auxiliary installation tool of claim 6, wherein: the outer diameter of the second main body (50) is the same as that of the left end of the first component (10) without threads.

9. The auxiliary installation tool of claim 6, wherein: the axial thickness of the third body (60) is greater than the axial thickness of the first component (10).

10. The auxiliary installation tool of claim 6, wherein: the auxiliary groove (42) is a polygonal groove body, and more specifically can be a triangle, a quadrangle, a pentagon or a hexagon.