阅读说明：本技术 自动变速装置 (Automatic transmission ) 是由 屠申富 屠昌德 于 2020-08-06 设计创作，主要内容包括：本发明提供了一种自动变速装置,属于变速装置技术领域。它解决了现有自动变速装置使用寿命短的问题。本自动变速装置包括主轴以及均设置于主轴上的变速组件与阻挡件,主轴上设有阻挡部与卡槽,阻挡件呈环状且其内沿嵌入卡槽内,变速组件两端分别与阻挡部及阻挡件相抵靠,阻挡件沿主轴轴向的截面呈方形且阻挡件由至少两个卡瓣拼接而成,主轴外设有呈筒形的护套,护套的一端部内侧具有台阶,阻挡件位于护套内侧并抵靠在台阶上,阻挡部一体成型于主轴上。本自动变速装置具有定位精准可靠、使用寿命长等优点。(The invention provides an automatic speed changing device, and belongs to the technical field of speed changing devices. It has solved the short problem of current automatic transmission life. The automatic speed changing device comprises a main shaft, a speed changing assembly and a blocking piece, wherein the speed changing assembly and the blocking piece are arranged on the main shaft, the blocking piece is annular and embedded into the clamping groove along the inner edge of the blocking piece, two ends of the speed changing assembly respectively abut against the blocking piece and the blocking piece, the blocking piece is square along the axial section of the main shaft and is formed by splicing at least two clamping flaps, a cylindrical sheath is arranged outside the main shaft, a step is arranged on the inner side of one end of the sheath, the blocking piece is located on the inner side of the sheath and abuts against the step, and the blocking piece is integrally. The automatic speed changing device has the advantages of accurate and reliable positioning, long service life and the like.)

1. An automatic speed changing device comprises a main shaft (4), a speed changing assembly (24) and a blocking piece (20) which are arranged on the main shaft (4), the main shaft (4) is provided with a blocking part (4a) and a clamping groove (4b), the blocking part (20) is annular, the inner edge of the blocking part is embedded into the clamping groove (4b), two ends of the speed change component (24) are respectively abutted against the blocking part (4a) and the blocking part (20), the novel spindle is characterized in that the cross section of the blocking piece (20) along the axial direction of the spindle (4) is square, the blocking piece (20) is formed by splicing at least two clamping flaps (20a), a cylindrical sheath (21) is arranged outside the spindle (4), a step (21a) is arranged on the inner side of one end of the sheath (21), the blocking piece (20) is located on the inner side of the sheath (21) and abuts against the step (21a), and the blocking part (4a) is integrally formed on the spindle (4).

2. The automatic speed changing device according to claim 1, further comprising a housing (1), wherein a first bearing seat (1a) is arranged in the housing (1), a first bearing (22) is arranged in the first bearing seat (1a), the first bearing (22) is fixed on the main shaft (4), the sheath (21) is sleeved on the main shaft (4), and the other end of the sheath (21) abuts against the first bearing (22).

3. Automatic transmission according to claim 1, characterized in that the main shaft (4) has an external thread adjacent to the snap groove (4b), the jacket (21) being screwed onto the main shaft (4).

4. Automatic transmission according to claim 2 or 3, characterized in that the end of the jacket (21) having the step (21a) is spaced from the transmission assembly (24).

5. The automatic transmission device according to claim 2, wherein a second bearing seat (1b) opposite to the first bearing seat (1a) is further arranged in the housing (1), a second bearing (23) is arranged in the second bearing seat (1b), the blocking portion (4a) is annular, the second bearing (23) and the transmission assembly (24) are respectively positioned on two sides of the blocking portion (4a), and the second bearing (23) abuts against the blocking portion (4 a).

6. The automatic transmission device according to claim 5, characterized in that the shifting assembly (24) comprises a first input gear (9), a damper (19) and a second input gear (20) which are sequentially arranged on the main shaft (4), wherein the first input gear (9) and the second input gear (20) are positioned at two sides of the damper (19), the second input gear (20) abuts against the blocking portion (4a), and the first input gear (9) abuts against the blocking portion (20).

7. Automatic transmission according to claim 1, 2 or 3, characterized in that said two snap flaps (20a) are in number and both snap flaps (20a) are semicircular, the snap flaps (20a) being made of 20 chromium.

Technical Field

The invention belongs to the technical field of speed changing devices, and relates to an automatic speed changing device.

Background

Automatic transmissions are used in electric motorcycles to enable speed changes between low and high speeds during forward motion, and some even to enable the vehicle to be converted between forward and reverse, such as a bidirectional automatic transmission of the type described in application No. 201510424829.9, filed by the present applicant. However, when the device is switched from a low speed to a high speed, the parts are in direct rigid contact, so that the noise is high, and the vehicle vibrates.

Therefore, the applicant improves the original structure and provides a buffer mechanism of an automatic transmission with the patent application number of 201911102335.3 again, the automatic transmission comprises a main shaft and an input assembly which is axially fixed on the main shaft and can rotate, the buffer mechanism comprises a buffer shell which is circumferentially fixed on the main shaft and is abutted against the input assembly, an annular cavity is arranged on the surface of the buffer shell facing the input assembly, an annular elastic buffer assembly I with a head end and a tail end is arranged in the annular cavity, when the input assembly rotates, the head end of the first elastic buffer assembly can be driven to move along the annular cavity, the annular cavity specifically comprises an inner annular groove and an outer annular groove which are mutually independent, the first elastic buffer assembly is arranged in the outer annular groove, a second elastic buffer assembly which is annular and has a head end and a tail end is arranged in the inner annular groove, the head end of the second elastic buffer assembly is fixedly connected with the tail end of the first elastic buffer assembly, and the tail end of the second elastic buffer assembly is fixedly connected with the buffer shell. Through the arrangement of the buffer mechanism, before power is transmitted to the main shaft, the power can be buffered by means of the first elastic buffer component and the second elastic buffer component, so that rigid collision is eliminated to reduce noise and slow down vibration.

The buffering mainly depends on the compression of the spring, however, in the actual buffering process, the spring is also tilted upwards or tilted downwards except for being compressed, so that the normal implementation of the buffering function is not affected, but the upward or downward tilting of the spring generates an acting force along the axial direction of the main shaft on the adjacent parts, so that the parts are displaced, the matching precision is reduced, and even the service life of the whole bidirectional automatic transmission is affected. For the positioning of the components on the shaft, a common technical means of a person skilled in the art is to install a traditional split retainer ring for the shaft after slotting on the shaft, however, the axial acting force generated when the spring is tilted is very large, and the split retainer ring for the shaft is a relatively thin annular metal plate, so that the hidden danger that the split retainer ring for the shaft deforms or even breaks after being stressed exists, and the positioning is unstable.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an automatic speed changing device which solves the problem of short service life.

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

automatic speed change device, including the main shaft and all set up main epaxial variable speed subassembly and block piece, the main shaft on be equipped with stop part and draw-in groove, block piece be annular and in its along embedding draw-in groove, the variable speed subassembly both ends respectively with stop part and block piece counterbalance and lean on, its characterized in that, block piece be square and block piece and form by at least two card lamella concatenations along the axial cross-section of main shaft, the main shaft is equipped with outward and is the cylindric sheath, a tip inboard of sheath has the step, block and be located the sheath inboard and support and lean on the step, stop part integrated into one piece on the main shaft.

During assembly, the speed change assembly is arranged on the main shaft, one end of the speed change assembly is abutted against the blocking part on the main shaft, then each clamping flap is arranged at the clamping groove, the protective sleeve is arranged outside the main shaft, each clamping flap is restrained by the inner side of the protective sleeve, the protective sleeve covers the blocking part, so that each clamping flap can be firmly combined into an annular blocking part, and the blocking part is abutted against the other end of the speed change assembly, so that the speed change assembly is axially fixed on the main shaft, and parts in the speed change assembly are prevented from being displaced by axial acting force generated in the working process.

In the automatic speed changing device, the blocking part is integrally formed on the main shaft, so that the blocking part has good structural strength, the axial load capacity of the blocking part is greatly improved, and one end of the speed changing assembly can be very firmly positioned; meanwhile, the other end of the speed change assembly is positioned by the blocking piece spliced by the clamping petals, the blocking piece spliced by the clamping petals is restrained by the independently arranged sheath, the square longitudinal section enables the spliced blocking piece to be fully contacted with the side wall of the clamping groove and the step, and the blocking piece is abutted against the step to form a supporting effect on the blocking piece, so that the blocking piece can be firmly fixed on the main shaft, the spliced blocking piece can be very stably matched with the speed change assembly and the main shaft, the blocking piece is not easy to deform or is separated from the clamping groove when the axial force generated by the operation of the speed change assembly is received, the axial load capacity of the blocking piece is well improved, and the other end of the speed change assembly can be very firmly positioned. Therefore, the whole speed change assembly can be firmly limited on the main shaft, and the service life is prolonged.

In the automatic speed changing device, the automatic speed changing device further comprises a shell, a first bearing seat is arranged in the shell, a first bearing is arranged in the first bearing seat, the first bearing is fixed on the main shaft, the sheath is sleeved on the main shaft, and the other end of the sheath abuts against the first bearing.

The other end of the sheath abuts against a first bearing fixed on the main shaft, and the sheath is firmly positioned and cannot move, so that the sheath can firmly position the blocking piece, and the blocking piece is combined with the blocking part integrally formed on the main shaft, so that the sheath can be always stably matched with the speed change assembly and the main shaft. Moreover, the positioning mode makes the assembly more convenient.

In the above automatic transmission, as another technical solution, the main shaft has an external thread adjacent to the engaging groove, and the sheath is screwed to the main shaft.

In the above automatic transmission, a gap is provided between one end of the sheath having the step and the transmission assembly.

A gap is formed between one end, provided with a step, of the sheath and the speed change assembly, so that axial acting force generated by the operation of the speed change assembly can be prevented from being directly applied to the first bearing through the sheath, and the service life is prolonged while the positioning stability is improved.

In the automatic transmission device, the housing is further provided with a second bearing seat opposite to the first bearing seat, a second bearing is arranged in the second bearing seat, the blocking part is annular, the second bearing and the transmission assembly are respectively positioned at two sides of the blocking part, and the second bearing is abutted against the blocking part.

The second bearing is separated from the speed change assembly by the blocking part, so that the axial acting force generated by the operation of the speed change assembly cannot be applied to the second bearing, the positioning stability is improved, and the service life is prolonged.

In the above automatic transmission, the transmission assembly includes a first input gear, a buffer and a second input gear sequentially disposed on the main shaft, the first input gear and the second input gear are disposed on two sides of the buffer, the second input gear abuts against the blocking part, and the first input gear abuts against the blocking part.

In the automatic transmission, the number of the clamping lobes is two, the two clamping lobes are semicircular, and the clamping lobes are made of 20 chromium.

The clamping flaps are made of 20 chromium, so that the combined blocking piece has higher hardness, can better bear the axial acting force generated by the operation of the speed changing assembly and stably transmits the axial acting force to the main shaft.

Compared with the prior art, the automatic speed changing device has the following advantages:

1. the blocking part is integrally formed on the main shaft, so that the blocking part has good structural strength, the axial load capacity of the blocking part is greatly improved, the blocking part is formed by splicing the clamping flaps and then restrained by the independently arranged protective sleeve, the spliced blocking part can be fully contacted with the side wall of the clamping groove and the step by the square longitudinal section, and the blocking part is abutted against the step to form a supporting function for the blocking part, so that the blocking part can be firmly fixed on the main shaft, the axial load capacity of the transmission assembly is well improved, two ends of the transmission assembly can be firmly positioned, the whole transmission assembly can be firmly limited on the main shaft, and the service life of the transmission assembly is prolonged.

2. The mode that the clamping petals are spliced and then the clamping petals are prevented from being scattered by the sheath is utilized, so that the installation and the disassembly are more convenient.

Drawings

Fig. 1 is a schematic diagram of a first embodiment of the automatic transmission.

Fig. 2 is a schematic diagram of the engagement between the input shaft, the transmission shaft, and the main shaft in the automatic transmission.

Fig. 3 is a longitudinal sectional view of the automatic transmission at the main shaft in the first embodiment.

FIG. 4 is a schematic view of the engagement between the drive abutments and the coupling sleeve in the automatic transmission.

FIG. 5 is a schematic view showing the engagement of the coupling sleeve with the centering block in the automatic transmission.

Fig. 6 is an exploded view of the stopper in the first embodiment of the automatic transmission.

In the figure, 1, a housing; 1a, a first bearing seat; 1b, a second bearing seat; 2. an input shaft; 3. a drive shaft; 4. an output shaft; 4a, a blocking part; 4b, a ring-shaped clamping groove; 5. an output gear; 6. a pinion gear; 7. a bull gear; 8. a reduction gear; 9. a first input gear; 10. a second input gear; 11. an inner ring; 12. a roller; 13. a connecting frame; 14. a transmission support; 14a, a cylindrical sleeve body; 14b, a circular tray body; 15. a coupling claw; 16. a coupling sleeve; 16a, a pushing part; 17. a centripetal block; 18. a magnetic block; 19. a buffer; 20. a blocking member; 20a, a clip; 21. a sheath; 21a, a step; 22. a first bearing; 23. a second bearing; 24. a speed change assembly.

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.