阅读说明：本技术 双向自动变速装置的变速传动机构 (Speed-changing transmission mechanism of bidirectional automatic speed-changing device ) 是由 屠申富 屠昌德 于 2020-06-04 设计创作，主要内容包括：本发明提供了一种双向自动变速装置的变速传动机构,属于变速器技术领域。它解决了现有变速传动机构成本高的问题。本双向自动变速装置的变速传动机构包括主轴、轴向固定在主轴外的输入件以及套设于主轴上并与输入件螺纹连接的结合件,结合件外侧设有能对其形成转动阻力的摩擦件,摩擦件采用条形金属片制成,摩擦件上具有弯折后形成的弹性作用部与配合部,摩擦件能通过配合部与双向自动变速装置的壳体形成周向固定,弹性作用部与结合件外壁相抵靠且弹性作用部的弹力向内作用在结合件上。本双向自动变速装置的变速传动机构具有制造成本低、耐磨性强等优点。(The invention provides a speed change transmission mechanism of a bidirectional automatic speed change device, and belongs to the technical field of transmissions. It has solved the current problem that variable speed drive mechanism is with high costs. The speed change transmission mechanism of the bidirectional automatic speed change device comprises a main shaft, an input piece axially fixed outside the main shaft and a combining piece sleeved on the main shaft and in threaded connection with the input piece, wherein a friction piece capable of forming rotation resistance to the friction piece is arranged on the outer side of the combining piece, the friction piece is made of strip-shaped metal sheets, an elastic action part and a matching part formed after bending are arranged on the friction piece, the friction piece can form circumferential fixation with a shell of the bidirectional automatic speed change device through the matching part, the elastic action part is abutted against the outer wall of the combining piece, and the elastic force of the elastic action part acts on the combining piece inwards. The speed change transmission mechanism of the bidirectional automatic speed change device has the advantages of low manufacturing cost, strong wear resistance and the like.)

1. The variable speed transmission mechanism of the bidirectional automatic speed changing device comprises a main shaft (1), an input part (3) axially fixed outside the main shaft (1) and a combining part (4) sleeved on the main shaft (1) and in threaded connection with the input part (3), wherein a friction part (5) capable of forming rotation resistance to the combining part (4) is arranged on the outer side of the combining part (4), the variable speed transmission mechanism is characterized in that the friction part (5) is made of strip-shaped metal sheets, an elastic action part (5a) and a matching part (5b) formed after bending are arranged on the friction part (5), the friction part (5) can form circumferential fixation with a shell of the bidirectional automatic speed changing device through the matching part (5b), the elastic action part (5a) abuts against the outer wall of the combining part (4), and the elastic force of the elastic action part (5a) inwards acts on the combining part (4).

2. The shift transmission mechanism of a bidirectional automatic transmission according to claim 1, wherein the friction member (5) has a ring shape having a mouth portion, and the elastic operation portion (5a) is located near the mouth portion.

3. The shift transmission mechanism of a bidirectional automatic transmission according to claim 2, wherein the friction member (5) has a tab (5d) folded outward at one end thereof, and the elastic operation portion (5a) is an inner side wall of the friction member (5) at the end thereof.

4. The gearshift transmission mechanism of a two-way automatic transmission according to claim 3, wherein the resilient action portion (5a) is a first sheet (5c), the outer circumferential surface of the engagement member (4) is a cylindrical surface, and the first sheet (5c) is tangential to the outer circumferential surface of the engagement member (4).

5. The variable speed drive of a bidirectional automatic transmission according to claim 4, wherein the friction member (5) further has a second plate (5e) tangential to the outer peripheral surface of the engaging member (4), and the protruding pieces (5d) and the second plate (5e) are respectively fixed to both ends of the first plate (5 c).

6. The gear shift transmission mechanism of a bidirectional automatic transmission as set forth in claim 5, wherein both ends of the friction member (5) are folded outwardly to form a protruding piece (5d), and an adjusting member (6) capable of adjusting the distance is provided between the two protruding pieces (5 d).

7. The speed change transmission mechanism of a bidirectional automatic transmission as recited in claim 1, 2, 3, 4, 5 or 6, wherein said engaging portion (5b) is bent into a U-shape, and the recess of the engaging portion (5b) faces outward.

8. The shift transmission mechanism of a bidirectional automatic transmission as recited in claim 1, wherein said friction member (5) has a quincunx shape, the elastic acting portion (5a) is an inwardly protruding portion of the friction member (5), and the engaging portion (5b) is an inwardly recessed portion of an outer portion of the friction member (5).

9. The shift transmission mechanism of a bidirectional automatic transmission as set forth in claim 1, wherein said friction member (5) is made of spring steel, and the friction member (5) is formed by press molding.

10. The variable speed drive mechanism of a bidirectional automatic transmission according to claim 1, wherein the coupling member (4) is cylindrical, one end of the coupling member (4) is located outside the input member (3) and is provided with an annular abutting surface (4b2), the coupling member (4) is provided with a gasket (7) and a limit snap spring (8) capable of preventing the gasket (7) from disengaging, and the friction member (5) is fixed between the annular abutting surface (4b2) and the gasket (7) along the axial direction of the coupling member (4).

Technical Field

The invention belongs to the technical field of transmissions, relates to a bidirectional automatic speed change device, and particularly relates to a speed change transmission mechanism of the bidirectional automatic speed change device.

Background

The traditional bidirectional automatic speed-changing motor realizes the forward or backward movement of the electro-tricycle through the matching of the one-way chuck, the forward one-way device and the backward one-way device, but the structure has the problems of incompact structure, scattered distribution of parts, excessive occupied space and the like. To this end, the applicant has developed an improvement to the conventional structure and proposed a bidirectional automatic transmission motor transmission of patent application No. 201610662924.7, which is advantageous in that the space occupied by the entire transmission is reduced to make the entire structure simpler, but it has a relatively high requirement for the fit between the parts, especially when switching between forward and reverse, which is liable to cause a failure in the switching due to the lack of fit.

In order to solve the above problems, the applicant has changed the prior art and proposed a reverse transmission mechanism of a bidirectional automatic transmission device with patent application number 201911101268.3, which comprises a main shaft, a transmission member sleeved on the main shaft and capable of forming a linkage relation with the main shaft, and an input member axially fixed on the main shaft, wherein a clutch structure capable of circumferentially linking or disengaging the transmission member and the input member is arranged between the transmission member and the input member, a connector is sleeved on the main shaft, and the clutch structure can switch between circumferential linkage and disengagement of the transmission member and the input member when the connector moves up and down, the connector is in threaded connection with the input member, an arc-shaped groove is arranged on the inner circumferential surface of the input member, a raised head is arranged on the outer side of the connector, and the raised head. When the vehicle is switched from forward to reverse, the input part receives power and rotates reversely relative to the transmission part, the input part is in threaded connection with the connecting part, and the raised head on the outer side of the connecting part is positioned in the arc-shaped groove of the input part, so that the input part can rotate relative to the connecting part through the matching of the arc-shaped groove and the raised head, the connecting part is driven to move upwards along the thread, the clutch structure is switched to the transmission part to be linked with the input part along the circumferential direction, the transmission part also starts to rotate reversely, and the main shaft is driven to rotate reversely to realize the reverse.

The convex head and the arc-shaped groove move relatively in the process of switching from forward to reverse, and because the input piece is in threaded connection with the joint piece, the rotating resistance needs to be applied to the outer side of the joint piece to ensure that the joint piece can move upwards smoothly. Therefore, the reverse drive mechanism of the bidirectional automatic speed changing device is sleeved with a positioning ring at the outer side of the combining part, the positioning ring and the shell of the bidirectional automatic speed changing device form circumferential fixation, meanwhile, a friction structure consisting of a spring and a steel ball is arranged between the positioning ring and the combining part, and the steel ball is propped against the combining part to form rotational resistance so as to ensure that the combining part can smoothly move upwards. However, the combined structure of the retaining ring, the steel ball and the spring causes the production cost to become relatively high. One approach that is conventional to those skilled in the art for this is to use less expensive materials to fabricate the retaining ring.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a speed change transmission mechanism of a bidirectional automatic speed change device, and solves the technical problem of high cost.

The purpose of the invention can be realized by the following technical scheme:

the variable speed transmission mechanism of the bidirectional automatic speed changing device comprises a main shaft, an input piece axially fixed outside the main shaft and a combining piece sleeved on the main shaft and in threaded connection with the input piece, wherein a friction piece capable of forming rotation resistance to the friction piece is arranged on the outer side of the combining piece.

When the input piece rotates reversely to reverse, the connecting piece is connected with the input piece through threads and the connecting piece is subjected to the rotating resistance exerted by the friction piece, and the friction piece and the shell of the bidirectional automatic speed changing device form circumferential fixation through the matching part, so that the connecting piece can move along the threads to control the main shaft to be linked with the input piece along the circumferential direction, and the reverse is further realized.

In the variable speed transmission mechanism, the friction piece is formed by bending a long metal sheet, the elastic action part and the matching part are both directly formed when the long metal sheet is bent to form the friction piece, and when the friction piece is placed on the outer side of the combining piece, the elastic action part directly abuts against the outer wall of the combining piece to form the rotating resistance of the combining piece. Compared with the positioning ring in the prior art which is a metal block with thicker thickness, the friction piece in the scheme greatly reduces the application of raw materials while forming effective rotation resistance on the combined piece, thereby greatly reducing the manufacturing cost. Furthermore, metal materials are more resistant to wear than conventional elastomeric materials such as plastics, nylon, and the like.

In the above-mentioned speed change transmission mechanism of the bidirectional automatic transmission, the friction member is in a ring shape having a mouth, and the elastic action portion is located near the mouth.

The elastic action part is arranged at the mouth part of the body, the friction piece is not easy to separate from the combining piece, and the stability of the friction piece and the combining piece in matching is ensured while the manufacturing cost is reduced.

In the above-described speed change transmission mechanism of the bidirectional automatic transmission, the friction member has a protruding piece at one end thereof, the protruding piece being folded outward, and the elastic operation portion is an inner side wall of the friction member at the end thereof.

One end of the friction piece is turned outwards to form a convex piece, so that the end part of the friction piece naturally generates inward elastic force, and when the friction piece is sleeved outside the joint piece, the inner side wall of the end part of the friction piece is used as an elastic action part to apply inward elastic force to form rotation resistance on the joint piece.

In the speed change transmission mechanism of the bidirectional automatic speed change device, the elastic action part is a first sheet body, the outer peripheral surface of the combining part is a cylindrical surface, and the first sheet body is tangent to the outer peripheral surface of the combining part.

The first sheet body is tangent to the outer peripheral surface of the combining piece, namely the first sheet body and the outer peripheral surface of the combining piece form line contact, so that the formation of rotation resistance is met, and the speed change switching sensitivity caused by overlarge rotation resistance can be avoided.

In the speed change transmission mechanism of the bidirectional automatic speed change device, the friction piece is also provided with a second sheet body tangent to the outer peripheral surface of the combining piece, and the lug and the second sheet body are respectively fixedly connected to two ends of the first sheet body.

The second sheet body is tangent to the peripheral surface of the combining part, line contact is formed between the second sheet body and the combining part, and the first sheet body is combined with the combining part to form line contact, so that the friction part can not shift, the manufacturing cost is reduced, and the reliability is ensured.

In the speed change transmission mechanism of the bidirectional automatic speed change device, two end parts of the friction piece are turned outwards to form protruding pieces, and an adjusting piece capable of adjusting the distance is arranged between the two protruding pieces.

The distance between the two convex pieces is adjusted through the adjusting piece, so that the elasticity of the elastic action part can be adjusted, the influence on the normal action of the combining piece due to the overlarge or undersize elasticity is avoided, and the reliability is ensured while the manufacturing cost is reduced. Conventionally, the elastic force of the spring is adjusted by tightening or loosening a screw.

In the above-mentioned speed change transmission mechanism of the bidirectional automatic transmission, the engaging portion has a bent U-shaped structure, and a notch of the engaging portion faces outward.

When the speed change transmission mechanism of the bidirectional automatic speed change device is fixed in the shell, the limiting part fixed in the shell can be directly clamped into the matching part, so that the friction piece and the shell are circumferentially fixed, and the friction piece can stably apply rotation resistance on the combining piece. The mating portion is also formed directly from the strip of sheet metal when bent into a friction member, thereby further reducing manufacturing costs.

In the above-mentioned speed change transmission mechanism of the bidirectional automatic transmission, as another technical solution, the friction member is of a quincunx shape, the elastic action portion is a portion of the friction member protruding inward, and the mating portion is one of the concave portions of the friction member.

In the speed change transmission mechanism of the bidirectional automatic speed change device, the friction piece is made of spring steel and is formed by punching.

The spring steel makes the friction piece have elasticity, adopts punching press mode shaping friction piece can improve production efficiency when reducing manufacturing cost.

In the speed change transmission mechanism of the bidirectional automatic speed change device, the combining piece is cylindrical, one end of the combining piece is positioned outside the input piece and is provided with an annular abutting surface, the combining piece is provided with a gasket and a limiting clamp spring capable of preventing the gasket from being separated, and the friction piece is fixed between the annular abutting surface and the gasket along the axial direction of the combining piece.

Compared with the prior art, the speed change transmission mechanism of the bidirectional automatic speed change device has the following advantages:

1. the friction piece is formed by bending a long metal sheet, and a matching part and an elastic action part are naturally formed after bending, so that effective rotation resistance is formed on the combined piece, and simultaneously, the application of raw materials is greatly reduced, and the manufacturing cost is greatly reduced;

2. the first sheet body and the second sheet body are in line contact with the combining part, so that the rotating resistance is formed, the insensitive speed change switching can be avoided, and the stable matching of the friction part and the combining part can be ensured to ensure the reliability;

3. through the arrangement of the adjusting piece, the rotation resistance can be adjusted to ensure the optimal state.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of a speed change transmission mechanism of the present bidirectional automatic transmission.

Fig. 2 is a sectional view of a first embodiment of the speed change transmission mechanism of the present bidirectional automatic transmission.

FIG. 3 is a cross-sectional view of a friction member and a push sleeve of a first embodiment of a shift transmission mechanism of the automatic two-way transmission.

FIG. 4 is a schematic view of a friction member in the first embodiment of the speed change transmission mechanism of the present automatic two-way speed change device.

Fig. 5A is a schematic bottom view of the push sleeve and the input member.

Fig. 5B is an exploded view of the push sleeve and the input member.

FIG. 6 is a schematic view of the input member, transmission member and clutch mechanism.

Fig. 7 is a schematic view between the input member and the coupling plate.

In the figure, 1, main shaft; 2. a transmission member; 2a, a first combining section; 2b, a second combining section; 2c, a yield section; 2d, connecting holes; 3. an input member; 3a, an arc-shaped groove; 4. a binder; 4a, a combination sleeve; 4a1, pin; 4b, a pushing sleeve; 4b1, nose; 4b2, annular abutment surface; 5. a friction member; 5a, an elastic action part; 5b, a matching part; 5c, a first sheet body; 5d, a lug; 5d1, vias; 5e, a second sheet body; 6. an adjustment member; 7. a gasket; 8. a limiting clamp spring; 9. a coupling disc; 9a, a connecting hole; 10. a roller; 11. a magnet; 12. a buffer; 13. an output gear; 14. a driven gear; 15. a connecting frame; 16. a transmission support; 17. a coupling claw; 18. a coupling sleeve; 19. and (4) centering the blocks.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.