CN215436784U - Middle shaft transmission device and scooter - Google Patents

Abstract

The utility model belongs to the technical field of mobility scooter and discloses a middle shaft transmission device and a mobility scooter, which comprise a bracket, wherein one side of the bracket is fixedly provided with a limiting seat, and the limiting seat is provided with a first through hole; a supporting seat is fixedly arranged on the other side of the bracket and provided with a second through hole; the limiting device comprises a limiting seat and a first through hole, wherein the limiting seat is arranged at the upper end of the core shaft; the other end of the mandrel penetrates through the second through hole and is provided with a second crank; a chain wheel is arranged between the first crank and the second crank of the mandrel; the dabber can be relative spacing seat and supporting seat rotation. The middle shaft transmission device is simple in structure, a five-way pipe and a connecting assembly on a frame in the prior art are omitted, assembly processes are reduced, the assembly difficulty is reduced, the production efficiency is improved, the use and forming processes of raw materials are reduced, and the cost is reduced integrally.

Description

Middle shaft transmission device and scooter

Technical Field

The utility model relates to the technical field of a scooter, in particular to a middle shaft transmission device and a scooter.

Background

The middle shaft transmission device in the scooter is a key transmission part, taking an electric vehicle as an example, the main parts of the middle shaft transmission device of the electric vehicle comprise a middle shaft, a crank, a chain wheel and a connecting assembly. In the existing middle shaft transmission device, a middle shaft is installed on a five-way of a frame through a connecting assembly (comprising a shaft bowl, a ball frame and a shaft bumper), a chain wheel is fixed in a middle shaft clamping groove through a pin and a nut, a crank is installed on square inclined planes at two ends of the middle shaft through an end nut, and the bicycle can be ridden after a pedal is installed. The middle shaft transmission device has the advantages of complex assembly process, difficult assembly and disassembly and difficult assembly and maintenance of the scooter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a middle shaft transmission device and a scooter, which can reduce the types and the number of parts in the middle shaft transmission device, thereby reducing the assembly process.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a bottom bracket shaft drive, comprising:

the device comprises a bracket, a first support and a second support, wherein a limiting seat is fixedly arranged on one side of the bracket and provided with a first through hole; a supporting seat is fixedly arranged on the other side of the support and provided with a second through hole;

one end of the mandrel penetrates through the first through hole and is provided with a first crank, and the limiting seat can limit the axial movement of the mandrel; the other end of the mandrel penetrates through the second through hole and is provided with a second crank; the mandrel can rotate relative to the limiting seat and the supporting seat; the dabber still is provided with the chain wheel, the chain wheel sets up first crank with between the second crank.

Preferably, the limiting seat comprises two first limiting seats which are buckled with each other, and the two first limiting seats are enclosed into the first through hole; one of them first spacing seat rigid coupling in the support, two first spacing seat detachable connection.

Preferably, the dabber includes the dabber main part and sets up in the spacing axle sleeve of dabber main part, spacing axle sleeve set up in first through-hole, the axial both ends of spacing axle sleeve respectively are equipped with a first card protruding, two first card protruding set up in outside the first through-hole, and two first card protruding respectively with spacing axial both ends butt.

Preferably, the limiting shaft sleeve comprises two first limiting blocks which are buckled with each other, a limiting hole is formed by the two first limiting blocks in a surrounding mode, and the mandrel main body penetrates through the limiting hole; the inner surface of the limiting hole is provided with an annular limiting groove, the outer peripheral surface of the mandrel main body is convexly provided with an annular limiting rib, and the limiting rib is located in the limiting groove.

Preferably, the limiting hole is of a polygonal structure, the inner surface of the limiting hole comprises a plurality of inner side walls which are sequentially connected end to end, and each inner side wall is in line contact with the outer periphery of the mandrel main body.

Preferably, the supporting seat comprises two first supporting seats which are buckled with each other, and the two first supporting seats are enclosed into the second through hole; one of them first supporting seat rigid coupling in the support, two first supporting seat can dismantle the connection.

Preferably, the mandrel further comprises a supporting sleeve arranged on the mandrel main body, and the supporting sleeve is arranged on the second through hole; the axial both ends of supporting axle sleeve respectively are equipped with a second card protruding, two the second card protruding set up in outside the second through-hole, and two the second card protruding respectively with the axial both ends butt of supporting seat.

Preferably, the support shaft sleeve comprises two first support blocks which are buckled with each other, a support hole is defined by the two first support blocks, and the mandrel body is arranged in the support hole in a penetrating manner; the supporting hole is of a polygonal structure, the inner surface of the supporting hole comprises a plurality of inner side walls which are sequentially connected and are connected end to end, and the inner side walls are in line contact with the outer periphery of the mandrel main body.

Preferably, the spindle body, the first crank, the second crank, and the crankset are integrally provided.

A scooter comprises the middle shaft transmission device in any scheme and further comprises a frame, and the support is fixedly connected to the frame.

Has the advantages that: the utility model provides a middle shaft transmission device and a scooter, wherein the scooter comprises a frame, a bracket is fixedly arranged on the frame, a limiting seat and a supporting seat are fixedly arranged on two sides of the bracket respectively, one end of a mandrel penetrates through a first through hole in the limiting seat and is provided with a first crank; the limiting seat can limit the axial movement of the mandrel; the other end of the mandrel penetrates through a second through hole in the supporting seat and is provided with a second crank; the dabber still is provided with the chain wheel, and the chain wheel setting is between first crank and second crank. The structure enables the mandrel to rotate relative to the limiting seat and the supporting seat without generating axial displacement. The middle shaft transmission device is simple in structure, a five-way pipe and a connecting assembly on a frame in the prior art are omitted, assembly procedures are reduced, the difficulty degree of assembly is reduced, the production efficiency is improved, meanwhile, the use and forming process of raw materials are also reduced, and the cost is integrally reduced.

Drawings

FIG. 1 is an exploded view of a bottom bracket drive provided by the present invention;

FIG. 2 is a cross-sectional view of the bottom bracket axle assembly provided by the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is an enlarged view of FIG. 2 at B;

fig. 5 is a schematic connection diagram of a limiting hole and a mandrel main body in the middle shaft transmission device provided by the utility model.

In the figure:

1. a support;

2. a limiting seat; 21. a first through hole; 22. a first limiting seat;

3. a supporting seat; 31. a second through hole; 32. a first support base;

4. a mandrel; 41. a mandrel body; 42. a limiting shaft sleeve; 421. a first snap projection; 422. a first stopper; 423. a limiting hole; 424. a limiting groove; 43. a support sleeve; 431. a second snap projection; 432. a first support block; 433. a support hole; 44. limiting ribs;

5. a first crank;

6. a second crank;

7. a chain wheel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a middle shaft transmission device which can be applied to a scooter such as a bicycle or an electric vehicle. As shown in fig. 1, fig. 1 is an exploded view of a bottom bracket bearing assembly provided by the present invention. The middle shaft transmission device comprises a support 1, wherein a limiting seat 2 is fixedly arranged on one side of the support 1, the limiting seat 2 is provided with a first through hole 21, and preferably, the first through hole 21 is arranged at the center of the limiting seat 2; the other side of the bracket 1 is fixedly provided with a supporting seat 3, and the supporting seat 3 is provided with a second through hole 31, preferably, the second through hole 31 is arranged at the center of the supporting seat 3. The middle shaft transmission device also comprises a mandrel 4, one end of the mandrel 4 is arranged in the first through hole 21 in a penetrating way and is provided with a first crank 5, and the limiting seat 2 can limit the axial displacement of the mandrel 4; the other end of the mandrel 4 penetrates through the second through hole 31 and is provided with a second crank 6; the spindle 4 is further provided with a chain wheel 7, and the chain wheel 7 is arranged between the first crank 5 and the second crank 6. The structure enables the mandrel 4 to rotate relative to the limiting seat 2 and the supporting seat 3 without generating axial displacement. In this embodiment, the chain wheel 7 is located between the limiting seat 2 and the supporting seat 3, in other embodiments, the position of the chain wheel 7 may be further set between the first crank 5 and the limiting seat 2, or between the second crank 6 and the supporting seat 3, and the specific position is determined according to the overall design of the scooter.

The middle shaft transmission device provided by the embodiment cancels the five-way pipe and the connecting component on the frame in the prior art, thereby reducing the assembly procedures, reducing the difficulty degree of assembly and improving the production efficiency; meanwhile, the use and forming processes of raw materials are reduced, and the cost is integrally reduced. In addition, in prior art, the dabber supports through the five-way of frame and rotates, and the strong point is at the dabber middle part, and this embodiment establishes the strong point into two, is located the position that is close to the dabber both ends respectively, need not to process the five-way, has reduced the processing degree of difficulty.

FIG. 2 is a cross-sectional view of the bottom bracket axle assembly provided by the present invention. As shown in fig. 2, the position-limiting base 2 includes two first position-limiting bases 22 that are buckled with each other, and the two first position-limiting bases 22 are enclosed to form a first through hole 21; one of the first position-limiting seats 22 is fixedly connected to the bracket 1, and the two first position-limiting seats 22 are detachably connected. Preferably, the supporting seat 3 comprises two first supporting seats 32 which are buckled with each other, and the two first supporting seats 32 enclose the second through hole 31; one of the first supporting seats 32 is fixedly connected to the bracket 1, and the two first supporting seats 32 are detachably connected. Specifically, the connecting member connecting the two first stopper seats 22 and the two first support seats 32 may be embodied as a bolt.

Optionally, the mandrel 4 includes a mandrel main body 41, and a limiting sleeve 42 and a supporting sleeve 43 disposed at two ends of the mandrel main body 41, wherein the limiting sleeve 42 is disposed in the first through hole 21, and the supporting sleeve 43 is disposed in the second through hole 31. Specifically, in the present embodiment, the spindle main body 41, the limiting sleeve 42 and the supporting sleeve 43 are separately provided, and in other embodiments, the spindle main body 41, the limiting sleeve 42 and the supporting sleeve 43 may also be integrally provided.

Fig. 3 is an enlarged view of fig. 2 at a. As shown in fig. 3, two axial ends of the limiting shaft sleeve 42 are respectively provided with a first protruding portion 421, the two first protruding portions 421 are disposed outside the first through holes 21, and the two first protruding portions 421 are respectively abutted to two axial ends of the limiting seat 2; the two first protrusions 421 limit the axial movement of the limiting shaft sleeve 42 relative to the limiting seat 2, so that the limiting shaft sleeve 42 can rotate in the first through hole 21 relative to the limiting seat 2 without generating axial displacement. Further, the limiting shaft sleeve 42 includes two first limiting blocks 422, the two first limiting blocks 422 are buckled to the mandrel main body 41, and a limiting hole 423 is defined by the two first limiting blocks 422. The inner surface of the limiting hole 423 is provided with an annular limiting groove 424, specifically, the limiting groove 424 is formed by two semi-annular grooves, each first limiting block 422 is provided with one semi-annular groove, and two ends of the two semi-annular grooves are respectively communicated. Correspondingly, the outer peripheral surface of the mandrel main body 41 is convexly provided with an annular limiting rib 44, the limiting rib 44 is positioned in the limiting groove 424, and the structure can limit the axial displacement of the mandrel main body 41 relative to the limiting shaft sleeve 42.

Fig. 4 is an enlarged view of fig. 2 at B. Referring to fig. 4, the axial ends of the supporting shaft sleeve 43 are provided with second protrusions 431, the two second protrusions 431 are disposed outside the second through hole 31, and the two second protrusions 431 are respectively abutted to the axial ends of the supporting base 3. The two second protrusions 431 limit the axial movement of the support sleeve 43 relative to the support seat 3, so that the support sleeve 43 can rotate relative to the support seat 3 in the second through hole 31 without axial displacement.

Optionally, the supporting sleeve 43 includes two first supporting blocks 432, the two first supporting blocks 432 are buckled to the mandrel body 41, and the two first supporting blocks 432 surround the supporting hole 433. In other embodiments, the support sleeve 43 may be provided as a unitary structure. Specifically, a support hole 433 is formed in the center of the support sleeve 43, one end of the support sleeve 43, which is close to the limit seat 2 in the axial direction, is provided with a second protrusion 431, and two ends of the second protrusion 431 in the axial direction are respectively abutted against the support seat 3 and the mandrel main body 41, so that the support sleeve 43 can rotate in the second through hole 31 relative to the support seat 3 without generating axial displacement. In addition, the support base 3 may also be an integrated structure, and at this time, in order to normally mount the support sleeve 43 to the second through hole 31 of the support base 3, the second locking protrusion 431 is not disposed on the support sleeve 43, and both ends of the support sleeve 43 may abut against the locking spring fixed to the mandrel body 41.

The setting of above-mentioned structure for dabber 4 is at the in-process of riding, and spacing seat 2 and supporting seat 3 rotate relatively, and do not produce axial displacement, thereby makes and installs in the chain wheel of dabber and does not produce axial displacement, has guaranteed that chain wheel and the flywheel of being connected with the chain wheel transmission are in same straight line, prevents that the chain pine from taking off. In addition, the limiting shaft sleeve 42 and the supporting shaft sleeve 43 can play a role of a self-lubricating bearing, so that the transmission friction force generated by the mandrel main body 41 in the riding process is reduced, and the transmission efficiency is improved.

Fig. 5 is a schematic connection diagram of the limiting hole 423 and the mandrel main body 41 in the middle shaft transmission device provided by the utility model. As shown in fig. 5, the limiting hole 423 is a polygonal structure, the inner surface of the limiting hole 423 includes a plurality of inner side walls that are sequentially connected end to end, and each inner side wall is in line contact with the outer circumference of the mandrel body 41. The arrangement can reduce the contact area between the mandrel main body 41 and the limiting shaft sleeve 42 while keeping the mandrel main body 41 to rotate stably, and further can further reduce the transmission friction force and improve the transmission efficiency. Similarly, the supporting hole 433 of the supporting sleeve 43 is also disposed in a polygonal structure, and the inner surface of the supporting hole 433 includes a plurality of inner sidewalls connected end to end in sequence, and each inner sidewall is in line contact with the outer circumference of the mandrel body 41. In this embodiment, the position-limiting hole 423 and the supporting hole 433 are disposed in a quadrilateral structure, and in other embodiments, the position-limiting hole 423 and the supporting hole 433 may also be disposed in a polygon such as a pentagon, a hexagon, etc., which is not limited herein.

Further, in order to reduce the types of parts, improve the utilization rate of the parts and simplify the production process of the parts, the limiting seat 2 can replace the supporting seat 3, and correspondingly, the limiting shaft sleeve 42 can replace the supporting shaft sleeve 43.

In this embodiment, the mandrel main body 41, the first crank 5, the second crank 6, and the crankset 7 are integrally provided, so that the number of connecting members used in assembly can be further reduced, and the assembly process can be simplified. During installation, a limiting shaft sleeve 42 and a supporting shaft sleeve 43 are respectively placed at two ends of the mandrel main body 41, and the limiting shaft sleeve 42 and the supporting shaft sleeve 43 are respectively placed on the first limiting seat 22 and the first supporting seat 32 fixedly connected with the bracket 1; finally, the other first limiting seat 22 is assembled with the first limiting seat 22 fixedly connected to the bracket 1, and the other first supporting seat 32 is assembled with the first supporting seat 32 fixedly connected to the bracket 1, so that the integral assembly is completed. Alternatively, in other embodiments, the mandrel main body 41, the first crank 5, the chain wheel 7, and the second crank 6 may be provided as a split structure, and at an early stage of assembly, the mandrel main body 41, the first crank 5, the chain wheel 7, and the second crank 6 are assembled into a whole through a connecting member and then mounted on the bracket 1. Further, the mandrel body 41, the first crank 5, the second crank 6, and the crankset 7 may be integrally provided in combination with each other, and for example, the mandrel body 41 and the crankset 7 may be integrally provided, and the mandrel body 41, the first crank 5, and the crankset 7 may be integrally provided.

The utility model also provides a scooter, which comprises the middle shaft transmission device for the scooter. The scooter also comprises a frame, and the bracket 1 in the middle shaft transmission device is fixedly connected with the frame.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bottom bracket shaft drive, comprising:

the device comprises a support (1), wherein a limiting seat (2) is fixedly arranged on one side of the support (1), and a first through hole (21) is formed in the limiting seat (2); a supporting seat (3) is fixedly arranged on the other side of the support (1), and a second through hole (31) is formed in the supporting seat (3);

the limiting device comprises a mandrel (4), wherein one end of the mandrel (4) penetrates through the first through hole (21) and is provided with a first crank (5), and the limiting seat (2) can limit the axial movement of the mandrel (4); the other end of the mandrel (4) penetrates through the second through hole (31) and is provided with a second crank (6); the mandrel (4) can rotate relative to the limiting seat (2) and the supporting seat (3); the mandrel (4) is further provided with a chain wheel (7), and the chain wheel (7) is arranged between the first crank (5) and the second crank (6).

2. The bottom bracket axle transmission according to claim 1, wherein the stop collar (2) comprises two first stop collars (22) which are buckled with each other, and the two first stop collars (22) enclose the first through hole (21); one of the first limiting seats (22) is fixedly connected to the support (1), and the two first limiting seats (22) are detachably connected.

3. The middle shaft transmission device according to claim 1, wherein the mandrel (4) comprises a mandrel main body (41) and a limiting shaft sleeve (42) arranged on the mandrel main body (41), the limiting shaft sleeve (42) is arranged on the first through hole (21), two first clamping protrusions (421) are respectively arranged at two axial ends of the limiting shaft sleeve (42), two first clamping protrusions (421) are arranged outside the first through hole (21), and the two first clamping protrusions (421) are respectively abutted against two axial ends of the limiting seat (2).

4. The middle shaft transmission device according to claim 3, wherein the limiting shaft sleeve (42) comprises two first limiting blocks (422) which are buckled with each other, and a limiting hole (423) is defined by the two first limiting blocks (422), and the mandrel body is arranged through the limiting hole (423); the inner surface of the limiting hole (423) is provided with an annular limiting groove (424), the outer peripheral surface of the mandrel main body (41) is convexly provided with an annular limiting rib (44), and the limiting rib (44) is located in the limiting groove (424).

5. The bottom bracket axle transmission device according to claim 4, wherein the position limiting hole (423) is a polygonal structure, the inner surface of the position limiting hole (423) comprises a plurality of inner side walls which are sequentially connected end to end, and each inner side wall is in line contact with the outer periphery of the mandrel main body (41).

6. Bottom bracket transmission according to claim 1, wherein said support base (3) comprises two first support bases (32) which are opposite to each other, and wherein said two first support bases (32) enclose said second through hole (31); one of the first supporting seats (32) is fixedly connected with the bracket (1), and the two first supporting seats (32) are detachably connected.

7. Bottom bracket axle transmission according to claim 3, wherein said spindle (4) further comprises a support bushing (43) arranged at the spindle body (41), said support bushing (43) being arranged at said second through hole (31); the two axial ends of the supporting shaft sleeve (43) are respectively provided with a second clamping protrusion (431), the second clamping protrusions (431) are arranged outside the second through hole (31), and the second clamping protrusions (431) are respectively abutted to the two axial ends of the supporting seat (3).

8. The bottom bracket bearing assembly according to claim 7, wherein the support sleeve (43) comprises two first support blocks (432) which are buckled with each other, and the two first support blocks (432) are enclosed into a support hole (433), and the spindle body is arranged through the support hole (433); support hole (433) are polygonized structure, the internal surface in support hole (433) includes a plurality of consecutive and end to end's inside wall, each the inside wall all contacts with the outer peripheral facial line of dabber main part (41).

9. Bottom bracket drive in accordance with claim 3, characterized in that the spindle body (41), the first crank (5), the second crank (6) and the crankset (7) are provided in one piece.

10. A scooter, characterized in that it comprises a bottom bracket transmission according to any one of claims 1-9, and further comprises a frame, to which the stand (1) is fixedly connected.

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