CN112855874B

CN112855874B - Speed changer

Info

Publication number: CN112855874B
Application number: CN202110120806.4A
Authority: CN
Inventors: 雷兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2022-07-22
Anticipated expiration: 2041-01-28
Also published as: CN112855874A

Abstract

The invention belongs to the technical field of transmissions and discloses a transmission which comprises a rack, wherein an input device, a gear shifting device and an output device are arranged on the rack; input device includes input shaft, separation and reunion main part, transmission shaft, installs input gear and circumference on the input shaft and distributes in a plurality of gear gears of input shaft outlying, output device include the output shaft and with a plurality of output gear on the output shaft, the gearshift includes gear shift carousel and gear shift gear, locking means locates in the frame and be used for the restriction the ratchet is rotatory, gear shift gear simultaneously with input gear and a gear meshing, utilize the stable direction rotation of restricting the gear shift carousel of locking means, avoid the condition of shake to return the shelves, produce magnetism through the solenoid in the clutch main part lateral wall and inhale, the shake of avoiding shifting the friction initial stage to bring causes the cooperation error of internal component.

Description

Speed changer

Technical Field

The invention belongs to the technical field of transmissions, and particularly relates to a transmission.

Background

A transmission is a mechanism for changing the speed and torque from an engine, which can change the transmission ratio of an output shaft and an input shaft, either fixed or stepped, and is also called a gearbox. A common automotive transmission is a set of transmission devices for coordinating the rotational speed of an engine and the actual driving speed of wheels, so as to achieve the best performance of the engine. The transmission can produce different gear ratios between the engine and the wheels during the running of the vehicle.

However, in the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: the existing speed changer has single structural form and the clutch has pause, shake and dynamic feeling.

Disclosure of Invention

The present invention aims to solve the above technical problem at least to some extent. The invention aims to provide a transmission.

The technical scheme adopted by the invention is as follows:

a speed changer comprises a frame, wherein an input device, a gear shifting device and an output device are arranged on the frame.

The input device comprises an input shaft, a clutch main body, a transmission shaft, an input gear arranged on the input shaft and a plurality of gear gears circumferentially distributed on the periphery of the input shaft, wherein the input shaft and the transmission shaft are connected or disconnected through the clutch main body, and the input shaft is connected with a power source.

The output device comprises an output shaft and a plurality of output gears arranged on the output shaft, the number of the output gears is the same as that of the gear gears, a connecting shaft is fixedly arranged on one side of each gear, an intermediate gear is arranged on one side, far away from the gear gears, of the connecting shaft, and the output gears are meshed with the intermediate gears in a one-to-one correspondence mode.

The gear shifting device comprises a gear shifting turntable and a gear shifting gear, the gear shifting gear is arranged on the side wall of the gear shifting turntable through a connecting rod, the upper portion of the gear shifting turntable is provided with a driving gear which is meshed with the upper portion of the gear shifting turntable, a ratchet wheel is arranged on the side wall, far away from the gear shifting gear, of the gear shifting turntable, locking devices are respectively arranged on two sides of the ratchet wheel, the locking devices are arranged on the rack and used for limiting rotation of the ratchet wheel, and the gear shifting gear is meshed with the input gear and the gear shifting gear simultaneously.

Preferably, locking means includes screens piece, locating rack, magnetic path, slide-spindle and spring, the locating rack is fixed in the frame, slide-spindle quantity is equipped with a plurality ofly, and the slide-spindle runs through the locating rack, the tip of locating rack is kept away from at the slide-spindle to the screens piece, the cover is equipped with the spring on the slide-spindle between locating rack and the screens piece, be equipped with a plurality of archs on the ratchet lateral wall, screens piece one side is equipped with bellied convex part on blocking the ratchet, the locating rack is equipped with a plurality of electro-magnets towards one side of screens piece, the screens piece is made by ferromagnetic substance.

Preferably, a gear shifting motor is installed on the frame, and the gear shifting motor drives the driving gear to rotate.

Preferably, the number of the stage gears is a positive integer greater than or equal to 2.

Preferably, the gear gears include a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, and a reverse gear.

Preferably, the output gears include a first output gear, a second output gear, a third output gear, a fourth output gear, a fifth output gear, a sixth output gear, and a seventh output gear.

Preferably, the first gear drives the first output gear to rotate through the meshing transmission of the first intermediate gear, the second gear drives the second output gear to rotate through the meshing transmission of the second intermediate gear, the third gear drives the third output gear to rotate through the meshing transmission of the third intermediate gear, the fourth gear drives the fourth output gear to rotate through the meshing transmission of the fourth intermediate gear, the fifth gear drives the fifth output gear to rotate through the meshing transmission of the fifth intermediate gear, the sixth gear drives the sixth output gear to rotate through the meshing transmission of the sixth intermediate gear, and the reverse gear drives the reverse gear to rotate through the meshing transmission of the seventh intermediate gear and the phase-change gear.

Preferably, fixed solid fixed ring and the fixed cover of being equipped with on the transmission shaft, the movable sleeve is equipped with the sliding sleeve between solid fixed ring and the fixed cover, the riveting of sliding sleeve both sides has the down tube, the transmission shaft extends to and overlaps on the inside tip of separation and reunion main part and is equipped with a linkage section of thick bamboo, the down tube tip is connected with the clutch disc through the arc pole, the arc pole middle part is located on the fixed cover lateral wall, clutch disc quantity is equipped with threely, is equipped with the friction disc between the clutch disc of two adjacent, the input shaft extends to and is equipped with the input disc on the inside tip of separation and reunion main part.

Preferably, a plurality of axial second transverse grooves are formed in the side wall of the linkage cylinder, a plurality of first protruding portions are arranged on the inner wall of the clutch plate and extend into the second transverse grooves, a plurality of axial ribs are arranged on the inner wall of the clutch main body, a plurality of first transverse grooves are formed in the outer side wall of the friction plate, and the first transverse grooves are buckled on the ribs.

The clutch is characterized in that an electric brush groove is formed in the outer side wall of the clutch main body, a plurality of electromagnetic coils are arranged in the clutch main body, a positive electrode electric brush is arranged in the electric brush groove, and the electromagnetic coils are electrically connected through sliding contact of the positive electrode electric brush to generate a magnetic field.

Preferably, a positioning bulge is arranged at one end of the transmission shaft, the positioning bulge is clamped in a groove in the end face of the input shaft, and an axial bearing is arranged between the positioning bulge and the input shaft.

The beneficial effects of the invention are as follows:

according to the transmission provided by the invention, the gear shifting device is used for connecting a single gear with the input gear for power transmission, when one gear is connected with the input gear for power transmission, the other gears are disconnected with the input gear, so that the rotation of the gear set is realized through the connection of different gear gears with the input gear, and the change of the rotating speed and the torque output by the output shaft can be realized due to different transmission ratios of each gear set.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a side view of the transmission of the present invention.

Fig. 2 is a schematic block diagram of the transmission of the present invention.

Fig. 3 is a partial cross-sectional view at the clutch body of the present invention.

Fig. 4 is a partially enlarged schematic view of the clutch body of the present invention.

FIG. 5 is a schematic view of the structure of the parts at the ratchet wheel of the present invention.

Fig. 6 is a partially enlarged view of the invention at a in fig. 5.

FIG. 7 is a cross-sectional view of a portion of a friction plate of the present invention.

FIG. 8 is a cross-sectional view of a portion of the components at the clutch plate of the present invention.

For the sake of easy observation, some parts are omitted in fig. 1 and 2.

In the figure: 1-a frame; 201-first gear; 202-second gear; 203-third gear; 204-fourth gear; 205-five gear; 206-sixth gear; 207-reverse gear; 208-input gear; 300-an output shaft; 301-a first output gear; 302-a second output gear; 303-a third output gear; 304-a fourth output gear; 305-a fifth output gear; 306-a sixth output gear; 307-seventh output gear; 310-phase change gear; 314-a fourth intermediate gear; 315-fifth intermediate gear; 316-sixth intermediate gear; 317-a seventh intermediate gear; 401-a shift dial; 402-a shifting gear; 407-a drive gear; 408-a ratchet wheel; 409-locking means; 410-a stuck bit block; 411-a positioning frame; 412-an electromagnet; 413-a sliding shaft; 414-a spring; 5-a clutch body; 51-edge; 501-diagonal rods; 502-a sliding sleeve; 503-fixing sleeve; 504-arc rod; 6-an input shaft; 61-an input disc; 7-a transmission shaft; 71-a fixed ring; 72-positioning projections; 73-axial bearing; 10-a connecting shaft; 12-a clutch plate; 121-a first projection; 13-friction plate; 131-a first transverse slot; 14-a linkage cylinder; 141-a second transverse slot; 15-positive electrode brush; 151-brush tank; 152-an electromagnetic coil.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1 to 8, a transmission includes a frame 1, an input device, a gear shifting device and an output device are mounted on the frame 1, the input device includes an input shaft 6, a clutch body 5, a transmission shaft 7, an input gear 208 mounted on the input shaft 6, and a plurality of gear gears circumferentially distributed on the periphery of the input shaft 6, the input shaft 6 and the transmission shaft 7 are connected or disconnected through the clutch body 5, and the input shaft 6 is connected with a power source.

The output device comprises an output shaft 300 and a plurality of output gears on the output shaft 300, the number of the output gears is the same as that of the gear gears, a connecting shaft 10 is fixedly arranged on one side of each gear, an intermediate gear is arranged on one side, away from the gear gears, of the connecting shaft 10, and the output gears are meshed with the intermediate gears in a one-to-one correspondence manner.

The gear shifting device comprises a gear shifting turntable and a gear shifting gear, the gear shifting gear is arranged on the side wall of the gear shifting turntable through a connecting rod, the upper portion of the gear shifting turntable is provided with a meshed driving gear 407, a gear shifting motor (not shown in the figure) is installed on the frame 1, the gear shifting motor can adopt a servo motor, the gear shifting motor drives the driving gear 407 to rotate, a ratchet 408 is arranged on the side wall of the gear shifting turntable far away from the gear shifting gear, two locking devices 409 are respectively arranged on two sides of the ratchet 408, the locking devices 409 are arranged on the frame 1 and are used for limiting the rotation of the ratchet 408, the gear shifting gear is meshed with the input gear 208 and the gear shifting gear simultaneously, the gear shifting motor drives the gear shifting turntable 401 through the driving gear 407, the gear shifting gear 402 rotates around the input gear 208, and the ratchet 408 also rotates along with the gear.

Wherein the first output gear 301 is meshed with the first intermediate gear, the second output gear 302 is meshed with the second intermediate gear, the third output gear 303 is meshed with the third intermediate gear, the fourth output gear 304 is meshed with the fourth intermediate gear 314, the fifth output gear 305 is meshed with the fifth intermediate gear 315, the sixth output gear 306 is meshed with the sixth intermediate gear 316, a direction changing gear is arranged between the seventh output gear 307 and the seventh intermediate gear 317, when the first intermediate gear, the second intermediate gear, the third intermediate gear, the fourth intermediate gear 314, the fifth intermediate gear 315 and the sixth intermediate gear 316 are rotated respectively, the rotation direction of the output shaft 300 is the same, and only when the seventh intermediate gear 317 rotates, the rotation direction of the output shaft 300 is changed, the reverse gear output effect can be realized, the transmission ratios of each group of output gears and the intermediate gear are different, and the speed change is realized.

The intermediate gears and the range gears are each connected by a connecting shaft 10, for example, a seventh output gear 307 and a seventh intermediate gear 317 are connected by the connecting shaft 10 as shown in fig. 2. The gear gears are equal in size, the gear shifting device is used for enabling a single gear to be connected with the input gear 208 for power transmission, when a certain gear is connected with the input gear 208 for power transmission, all the other 6 gear gears are disconnected with the input gear 208, therefore, the gear gears are connected with the input gear 208 through different gear gears, rotation of the gear sets is achieved, when all the gear gears and the input gear 208 are in a separated state, namely in a neutral gear state, and due to the fact that the transmission ratio of each gear set is different, the change of the rotating speed and the torque output by the output shaft 300 can be achieved.

The gear stage gears include a first gear 201, a second gear 202, a third gear 203, a fourth gear 204, a fifth gear 205, a sixth gear 206, and a reverse gear 207, the output gears include a first output gear 301, a second output gear 302, a third output gear 303, a fourth output gear 304, a fifth output gear 305, a sixth output gear 306, and a seventh output gear 307, and the corresponding 7 intermediate gears are a first intermediate gear (not shown), a second intermediate gear (not shown), a third intermediate gear (not shown), a fourth intermediate gear 314, a fifth intermediate gear 315, a sixth intermediate gear 316, and a seventh intermediate gear 317, respectively.

The locking device 409 comprises a plurality of clamping blocks 410, a positioning frame 411, magnetic blocks, a sliding shaft 413 and springs 414, the positioning frame 411 is fixed on the frame 1, the number of the sliding shafts 413 is multiple, the sliding shafts 413 penetrate through the positioning frame 411, the clamping blocks 410 are arranged at the end parts of the sliding shafts 413 far away from the positioning frame 411, the springs 414 are sleeved on the sliding shafts 413 between the positioning frame 411 and the clamping blocks 410, the side walls of the ratchet wheels 408 are provided with a plurality of bulges, one side of each clamping block 410 is provided with a convex part for clamping the bulge on the ratchet wheel 408, one side of the positioning frame 411 facing the clamping blocks 410 is provided with a plurality of electromagnets 412, the clamping blocks 410 are made of ferromagnetic substances, iron, nickel, steel, cobalt and alloys thereof and other substances which can be attracted by the magnets are ferromagnetic substances, other substances which can not be attracted by the magnets are non-ferromagnetic substances, the number of gear gears is a positive integer greater than or equal to 2, when the transmission is in a certain gear for stable operation, the locking device 409 locks the ratchet 408, so that the gear shifting turntable is also fixed, and the stability of output is ensured.

The first-gear 201 drives the first output gear 301 to rotate through meshing transmission of a first intermediate gear, the second-gear 202 drives the second output gear 302 to rotate through meshing transmission of a second intermediate gear, the third-gear 203 drives the third output gear 303 to rotate through meshing transmission of a third intermediate gear, the fourth-gear 204 drives the fourth output gear 304 to rotate through meshing transmission of a fourth intermediate gear 314, the fifth-gear 205 drives the fifth output gear 305 to rotate through meshing transmission of a fifth intermediate gear 315, the sixth-gear 206 drives the sixth output gear 306 to rotate through meshing transmission of a sixth intermediate gear 316, and the reverse gear 207 drives the reverse gear 207 to rotate through meshing transmission of a seventh intermediate gear 317 and a phase-changing gear 310.

Fixed solid fixed ring 71 and the fixed cover 503 of being equipped with on transmission shaft 7, the movable sleeve is equipped with sliding sleeve 502 between solid fixed ring 71 and the fixed cover 503, sliding sleeve 502 both sides riveting has down tube 501, the cover is equipped with linkage section of thick bamboo 14 on transmission shaft 7 extends to the tip of separation and reunion main part 5 inside, down tube 501 tip is connected with clutch disc 12 through arc pole 504, arc pole 504 middle part is located on the fixed cover 503 lateral wall, clutch disc 12 quantity is equipped with threely, is equipped with friction disc 13 between the clutch disc 12 of two adjacent, input shaft 6 extends to and is equipped with input disc 61 on the tip of separation and reunion main part 5 inside.

When the gear is required to be shifted, the electromagnet 412 is electrified to generate magnetism, so that attraction force is generated on the clamping block 410 made of ferromagnetic materials, the clamping block 410 moves towards the positioning frame 411, the clamping block 410 presses the spring 414 and is attracted by the electromagnet 412, the gear shifting motor is electrified at the moment to enable the driving gear 407 to rotate for a preset angle, the corresponding gear is meshed with the gear shifting gear to complete shifting, then the electromagnet 412 is electrified, the clamping block 410 is pushed out and buckled with the ratchet 408 under the action of the reset thrust of the spring 414 to limit the rotation of the ratchet 408, and as the gear shifting gear is meshed with the gear shifting gear and the gear shifting gear is meshed with the input gear 208 simultaneously, when the transmission shaft 7 rotates, power is output to the output gear through the corresponding gear.

The gear shifting motors can be arranged more than two, the plurality of gear shifting motors are connected with the driving gear 407, and when gear shifting is needed, the plurality of gear shifting motors can work simultaneously to increase torque. According to actual needs, only one gear shifting motor is fixed to work during gear shifting, the other gear shifting motor serves as a safety reserve, and after one gear shifting motor fails, the other gear shifting motor works instead.

Be equipped with a plurality of axial second cross grooves 141 on the 14 lateral walls of linkage section of thick bamboo, be equipped with a plurality of first convex parts 121 on the clutch disc 12 inner wall, first convex part 121 extends to in the second cross groove 141, be equipped with a plurality of axial arriss 51 on the 5 inner walls of separation and reunion main part, be equipped with a plurality of first cross grooves 131 on the friction disc 13 lateral wall, first cross groove 131 buckle in on the arris 51, a transmission shaft 7 tip is equipped with location arch 72, location arch 72 inlay card is in the recess of input shaft 6 terminal surface, be equipped with axial bearing 73 between location arch 72 and the input shaft 6.

When the sliding table slides on the transmission shaft 7 between the fixing ring 71 and the positioning boss 72, the inclined rod 501 and the arc rod 504 drive the clutch plate 12 close to the fixing sleeve 503 to slide on the linkage cylinder 14, the clutch plate 12 slides in the second transverse groove 141 of the linkage cylinder 14 through the first convex part 121, the clutch plate 12 and the clutch main body 5 are always kept separated, the friction plate 13 is buckled on the rib 51 in the clutch main body 5 through the first transverse groove 131 to slide, the friction plate 13 and the linkage cylinder 14 are always kept separated, the clutch plate 12 and the friction plate 13 are separated from the original close fit state through the sliding sleeve 502, the clutch plate 12 and the input disc 61 on the input shaft 6 are separated to form a power source disconnection, the positioning boss 72 on the transmission shaft 7 is movably connected at the end part of the input shaft 6 through the axial bearing 73, and when the moving thrust of the sliding sleeve 502 is cancelled, the column clutch plate 12 is jacked again through the inclined rod 501 and the sliding rod 502, The friction plates 13 and the input disc 61 effect power transmission.

The outer side wall of the clutch main body 5 is provided with an electric brush groove 151, the clutch main body 5 is internally provided with a plurality of electromagnetic coils 152, the electric brush groove 151 is internally provided with an anode electric brush 15, the anode electric brush 15 is a sliding contact body and has the characteristics of smoothness, wear resistance and good conductivity, the electromagnetic coils 152 are electrically connected through the sliding contact of the anode electric brush 15 to generate a magnetic field, the input disc 61 is made of a material capable of being magnetically attracted, the electrified electromagnetic coils 152 generate attraction force on the input disc 61, the shake is reduced before and after gear shifting and when the clutch disc 12 and the friction disc 13 are in contact with the input disc 61, the shake can be understood as the rotation of the input disc 61, an initial speed is given to the clutch main body, the shake caused by the large speed difference of relative rotation is avoided, and the sliding pushing operation of the sliding sleeve 502 is started after 1-2 seconds when the battery coils 152 are electrified to work, namely, the sticking and friction time of the clutch plate 12 and the friction plate 13 in the clutch main body 5 is delayed by 1-2 seconds, and the smoothness is improved.

It should be noted that, in this embodiment, 7 gear gears are provided respectively, and 7 sets of gear sets are correspondingly provided, in practical applications, 3, 4, 5, 6, or 8 gear gears may also be optionally provided, and the same number of gear sets may be correspondingly provided at the same time.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. A transmission, characterized by: the automatic transmission device comprises a rack, wherein an input device, a gear shifting device and an output device are arranged on the rack;

the input device comprises an input shaft, a clutch main body, a transmission shaft, an input gear arranged on the input shaft and a plurality of gear gears circumferentially distributed on the periphery of the input shaft, wherein the input shaft and the transmission shaft are connected or disconnected through the clutch main body, and the input shaft is connected with a power source;

the output device comprises an output shaft and a plurality of output gears on the output shaft, the number of the output gears is the same as that of the gear gears, one side of each gear is fixedly provided with a connecting shaft, one side of each connecting shaft, which is far away from the gear gears, is provided with an intermediate gear, and the output gears are meshed with the intermediate gears in a one-to-one correspondence manner;

the gear shifting device comprises a gear shifting turntable and a gear shifting gear, the side wall of the gear shifting turntable is provided with the gear shifting gear through a connecting rod, the upper part of the gear shifting turntable is provided with a driving gear which is meshed with the gear shifting turntable, the side wall of the gear shifting turntable, which is far away from the gear shifting gear, is provided with a ratchet wheel, two sides of the ratchet wheel are respectively provided with a locking device, the locking devices are arranged on the frame and are used for limiting the rotation of the ratchet wheel, and the gear shifting gear is meshed with the input gear and one gear at the same time;

the locking device comprises a plurality of clamping blocks, a positioning frame, magnetic blocks, a sliding shaft and springs, the positioning frame is fixed on a rack, the number of the sliding shafts is multiple, the sliding shaft penetrates through the positioning frame, the clamping blocks are arranged at the end parts, far away from the positioning frame, of the sliding shaft, the springs are sleeved on the sliding shaft between the positioning frame and the clamping blocks, a plurality of protrusions are arranged on the side wall of the ratchet wheel, a convex part for clamping the protrusions on the ratchet wheel is arranged on one side of each clamping block, a plurality of electromagnets are arranged on one side, facing the clamping blocks, of the positioning frame, and the clamping blocks are made of ferromagnetic substances;

the clutch comprises a transmission shaft, a clutch body and an input shaft, and is characterized in that a fixing ring and a fixing sleeve are fixedly arranged on the transmission shaft, a sliding sleeve is movably sleeved between the fixing ring and the fixing sleeve, inclined rods are riveted to two sides of the sliding sleeve, a linkage cylinder is sleeved on the end portion, extending to the inside of the clutch body, of the transmission shaft, the end portion of each inclined rod is connected with a clutch plate through an arc rod, the middle of each arc rod is arranged on the side wall of the corresponding fixing sleeve, the number of the clutch plates is three, friction plates are arranged between every two adjacent clutch plates, and an input disc is arranged on the end portion, extending to the inside of the clutch body, of the input shaft;

a plurality of axial second transverse grooves are formed in the side wall of the linkage cylinder, a plurality of first protrusions are arranged on the inner wall of the clutch plate and extend into the second transverse grooves, a plurality of axial ridges are arranged on the inner wall of the clutch main body, a plurality of first transverse grooves are formed in the outer side wall of the friction plate, and the first transverse grooves are buckled on the ridges; the outer side wall of the clutch main body is provided with an electric brush groove, a plurality of electromagnetic coils are arranged in the clutch main body, a positive electrode electric brush is arranged in the electric brush groove, and the electromagnetic coils are electrically connected through sliding contact of the positive electrode electric brush to generate a magnetic field; one end of the transmission shaft is provided with a positioning bulge, the positioning bulge is clamped in a groove in the end face of the input shaft, and an axial bearing is arranged between the positioning bulge and the input shaft.

2. The transmission of claim 1, wherein: and a gear shifting motor is arranged on the rack and drives the driving gear to rotate.

3. The transmission of claim 2, wherein: the number of the gear gears is a positive integer greater than or equal to 2.

4. The transmission of claim 3, wherein: the gear gears comprise a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear and a reverse gear.

5. The transmission of claim 4, wherein: the output gears include a first output gear, a second output gear, a third output gear, a fourth output gear, a fifth output gear, a sixth output gear, and a seventh output gear.

6. The transmission of claim 5, wherein: the first gear drives the first output gear to rotate through the meshing transmission of the first intermediate gear, the second gear drives the second output gear to rotate through the meshing transmission of the second intermediate gear, the third gear drives the third output gear to rotate through the meshing transmission of the third intermediate gear, the fourth gear drives the fourth output gear to rotate through the meshing transmission of the fourth intermediate gear, the fifth gear drives the fifth output gear to rotate through the meshing transmission of the fifth intermediate gear, the sixth gear drives the sixth output gear to rotate through the meshing transmission of the sixth intermediate gear, and the reverse gear drives the reverse gear to rotate through the meshing transmission of the seventh intermediate gear and the phase-changing gear.