CN114542681A - An electric vehicle transmission - Google Patents

Abstract

The invention discloses an electric vehicle transmission, which relates to the technical field of electric vehicles and has the advantage of changing the output speed of the motor. A drive gear is coaxially arranged, a swing rod is hinged on the inner wall of the gearbox, and a first driven gear is rotatably connected to the end of the swing rod away from the gearbox, and a limiter to limit the swing of the swing rod is arranged on the inner wall of the gearbox. , the inner wall of the gearbox is rotatably connected with an output shaft between the driving gear and the first driven gear, the outer wall of the output shaft is coaxially provided with a second driven gear, the driving gear, the first driven gear and the second driven gear The driven gear is connected by a belt, one end of the output shaft extends out of the outer wall of the gearbox, and the outer wall of the output shaft is provided with a drive disk, and the drive disk is provided with a third driven gear coaxial with the second driven gear. There is a driving member for connecting the third driven gear with the belt.

Description

An electric vehicle transmission

technical field

The invention relates to the technical field of electric vehicles, in particular to an electric vehicle transmission.

Background technique

Electric vehicle, that is, electric drive vehicle, also known as electric drive vehicle. Electric vehicles are divided into AC electric vehicles and DC electric vehicles. Generally speaking, the electric vehicle uses the battery as the energy source, and converts the electrical energy into mechanical energy movement through the controller, motor and other components to control the current size and change the speed of the vehicle; the motor of the electric vehicle usually adopts the ordinary medium-speed motor to directly output the driving force , the motor outputs the same gear from start to top speed. Therefore, the present application provides a speed change mechanism for an electric motor, which meets the usage requirements.

SUMMARY OF THE INVENTION

In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an electric vehicle transmission, which has the advantage of changing the output speed of the motor.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

The invention provides an electric vehicle transmission, including a gearbox, a motor is arranged in the gearbox, a drive gear is coaxially arranged on the outer wall of the rotating shaft of the motor, a swing rod is hinged on the inner wall of the gearbox, and the swing rod One end away from the gearbox is rotatably connected with a first driven gear, the inner wall of the gearbox is provided with a limiter to limit the swing of the pendulum rod, and the inner wall of the gearbox is rotatably connected with an output between the drive gear and the first driven gear The outer wall of the output shaft is coaxially provided with a second driven gear, the driving gear, the first driven gear and the second driven gear are connected by a belt, and one end of the output shaft extends out of the outer wall of the gearbox, so The outer wall of the output shaft is provided with a drive disc, the drive disc is provided with a third driven gear coaxial with the second driven gear, and the drive disc is provided with a drive member that connects the third driven gear with the belt .

By adopting the above technical solution, the rotational speed output by the rotating shaft of the motor is transmitted to the second driven gear through the belt, thereby controlling the output speed of the output shaft. At this time, the driving element drives the third driven gear to replace the second driven gear and the belt. The diameter of the third driven gear is larger than the diameter of the second driven gear to adjust the speed of the output shaft. The setting of the limiter facilitates the adjustment of the belt when the third driven gear replaces the second driven gear.

Preferably, the third driven gear includes a plurality of arc-shaped plates spliced with each other, and a plurality of driving teeth are arranged on the outer side of each arc-shaped plate. A moving rod corresponding to the plate, one end of the moving rod is connected with the arc-shaped plate, and the other end extends out of the side of the drive disc away from the second driven gear, and the drive disc is provided on the side away from the second driven gear. There are cylinders that drive each moving rod to move.

Preferably, one inner wall of the arc-shaped plate is provided with an arc-shaped bending rod, and one end of the bending rod away from the arc-shaped plate is provided with a collision block that collides with the inner wall of the adjacent arc-shaped plate, and the collision block is provided with There is an arc-shaped surface, and an embedded block for the interference block to be embedded is arranged adjacent to the inner wall of the arc-shaped plate, and the embedded block enters the area of the bent rod.

Preferably, the inner wall of the gearbox is provided with a drive plate extending into the space formed by the belt, and the outer wall of the drive plate is provided with infrared rays of the cylinder corresponding to the moving rod on the arc plate and controlling the movement of the moving rod in the circumferential direction. The receiver, the drive board is provided with an infrared transmitter, when the infrared receiver receives the signal sent by the infrared transmitter, the cylinder connected with the infrared receiver controls the movement of the moving rod.

Preferably, the drive disk is provided with guide rods at both ends of the moving rod, and the guide rods are slidably connected with the arc-shaped plate.

Preferably, the limiting member includes a drive shaft disposed on the upper end of the swing rod, both ends of the drive shaft are rotatably connected to the inner wall of the gearbox, and the outer wall of the drive shaft is coaxially provided with a fourth driven gear, so An electric motor is arranged on the inner wall of the gearbox, and a fifth driven gear that meshes with the fourth driven gear is coaxially arranged on the rotating shaft of the electric motor.

Preferably, the first driven gear is provided with a control member that enables the motor to change the rotation of the swing rod as the third driven gear and the second driven gear mesh with the belt.

Preferably, the control member includes a pressure sensor disposed on the surface of the first driven gear wheel and controlling the rotation of the motor, and the pressure sensor interferes with the belt.

Preferably, the motor is provided with an adjustment module that controls the operation of the motor, and the pressure sensor collects the pressure value D that the belt acts on the first driven gear, and transmits the collected pressure value D to the adjustment module, and the adjustment module is used to generate a control signal according to the pressure value D, and the electric motor is used to control the forward and reverse rotation of the fifth driven gear according to the control signal;

The preset distance includes preset value 1 and preset value 2, preset value 1 is the pressure value on the first driven gear when the belt is tensioned when the drive gear, the first driven gear and the second driven gear are connected by a belt ;

The second preset value is the pressure value on the first driven gear when the belt is tensioned when the driving gear, the first driven gear and the third driven gear are connected by the belt;

The control signal includes a first signal and a second signal. When the pressure value D is greater than a preset value of one and less than a preset value of two, the adjustment module on the motor generates a first signal according to the pressure value D. When the value D is less than the preset value one, the regulating module on the electric motor generates a second signal according to the pressure value D;

The electric motor makes the fifth driven gear rotate forward in response to the first signal, and then drives the drive shaft to rotate, so that the pendulum rod swings toward the output shaft, and the electric motor makes the fifth driven gear reverse in response to the second signal, and then Drive the drive shaft to rotate, so that the swing rod swings away from the output shaft.

Preferably, the control signal further includes a third signal, and when the pressure value D is equal to a preset value of one or a preset value of two, the adjustment module on the electric motor generates a third signal according to the pressure value D, and the electric motor The fifth driven gear is stopped from rotating in response to the third signal.

The beneficial effect of the present invention is that the rotational speed output by the rotating shaft of the motor is transmitted to the second driven gear through the belt, so as to control the output speed of the output shaft. At this time, the driving element drives the third driven gear to replace the second driven gear and The belt meshes, the diameter of the third driven gear is larger than the diameter of the second driven gear to adjust the output shaft speed, and the setting of the limiter facilitates the adjustment of the belt when the third driven gear replaces the second driven gear.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural representation of this embodiment;

FIG. 2 is a schematic structural diagram for embodying the output shaft of the present embodiment;

FIG. 3 is a schematic structural diagram for embodying a drive disk according to the present embodiment;

FIG. 4 is a schematic structural diagram for embodying the drive shaft according to the present embodiment.

Description of reference numbers:

In the figure: 1, gearbox; 11, motor; 12, drive gear; 121, swing rod; 122, first driven gear; 13, output shaft; 131, second driven gear; 132, belt; 133, drive Disc; 134, Arc plate; 135, Moving rod; 136, Cylinder; 14, Bending rod; 141, Interfering block; 142, Embedded block; 15, Driving plate; 151, Infrared receiver; 152, Infrared transmitter; 16 17, the drive shaft; 171, the fourth driven gear; 172, the motor; 173, the fifth driven gear; 18, the pressure sensor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An electric vehicle transmission, as shown in Figures 1 and 2, includes a gearbox 1, a motor 11 is arranged in the gearbox 1, a drive gear 12 is coaxially provided on the outer wall of the rotating shaft of the motor 11, and a swing rod 121 is hinged on the inner wall of the gearbox 1. The end of the swing rod 121 away from the gearbox 1 is rotatably connected with a first driven gear 122. The inner wall of the gearbox 1 is provided with a limiter to limit the swing of the swing rod 121. The inner wall of the gearbox 1 is connected between the driving gear 12 and the first driven gear. The output shaft 13 is rotatably connected between the 122. The outer wall of the output shaft 13 is coaxially provided with a second driven gear 131. The driving gear 12, the first driven gear 122 and the second driven gear 131 are connected by a belt 132. The output shaft 13 One end extends out of the outer wall of the gearbox 1. In order to change the rotational speed of the output shaft 13, the outer wall of the output shaft 13 is provided with a drive plate 133. The drive plate 133 is located on one side of the second driven gear 131. The third driven gear is coaxial with the two driven gears 131 , and the drive plate 133 is provided with a driving member for connecting the third driven gear with the belt 132 .

1 and 2, the rotational speed output by the rotating shaft of the motor 11 is transmitted to the second driven gear 131 through the belt 132, thereby controlling the output speed of the output shaft 13. At this time, the driving member drives the third driven gear to replace the second driven gear. The driven gear 131 meshes with the belt 132. The diameter of the third driven gear is larger than the diameter of the second driven gear 131 to adjust the speed of the output shaft 13. The setting of the stopper is convenient for the third driven gear to replace the second driven gear. The belt 132 is adjusted when the gear 131 is driven.

2 and 3, the third driven gear includes a plurality of arc-shaped plates 134 spliced with each other, and each arc-shaped plate 134 is provided with a plurality of driving teeth on the outer side. At this time, each arc-shaped plate 134 and the driving teeth form a third driven gear The driving member includes a moving rod 135 which is passed through the driving disk 133 and corresponds to the arc-shaped plate 134. One end of the moving rod 135 is connected with the arc-shaped plate 134, and the other end extends out of the driving disk 133 away from the second slave. On one side of the driven gear 131 , the drive plate 133 is provided with an air cylinder 136 on the side away from the second driven gear 131 for driving the respective moving rods 135 to move. At this time, each air cylinder 136 drives each moving rod 135 to move, so that each moving rod 135 drives the corresponding arc plate 134 to move toward the second driven gear 131 until it moves to the same plane. The plate 134 is in contact, with the rotation of the output shaft 13, the arc plate 134 is in contact with the belt 132, and then each arc plate 134 is successively moved to the same plane as the second driven gear 131, so that the belt 132 is wound to each arc plate 134 , the limiter drives the swing rod 121 to swing toward the output shaft 13 , so that the belt 132 is tensioned, so that the rotational speed of the motor 11 is transmitted to the third driven gear, thereby changing the rotational speed of the output shaft 13 .

As shown in FIG. 2 and FIG. 3 , in order to facilitate the contact between the first arc-shaped plate 134 and the belt 132 , an arc-shaped bending rod 14 is provided on the inner wall of one side of the arc-shaped plate 134 , and the bending rod 14 is away from one end of the arc-shaped plate 134 There is an interference block 141 that collides with the inner wall of the adjacent arc-shaped plate 134, the interference block 141 is provided with an arc surface, and the inner wall of the adjacent arc-shaped plate 134 is provided with an embedded block 142 for the interference block 141 to be embedded, and the embedded block 142 enters in the area of the bent rod 14 . When the rotation speed of the output shaft 13 needs to be changed, one of the arc-shaped plates 134 is moved to the same plane as the second driven gear 131. At this time, with the rotation of the output shaft 13, the arc-shaped surface first collides with the belt 132, so that the The distance between the belt 132 and the second driven gear 131 is increased, so that the subsequent arc-shaped plate 134 can engage with the belt 132 .

2 and 3 , the inner wall of the gearbox 1 is provided with a driving plate 15 extending into the space formed by the belt 132 , and the outer peripheral wall of the driving plate 133 is provided with a moving rod 135 corresponding to the moving rod 135 on the arc plate 134 . The infrared receiver 151 of the cylinder 136 that controls the movement of the moving rod 135 is provided with an infrared transmitter 152 on the drive board 15. When the infrared receiver 151 receives the signal sent by the infrared transmitter 152, it is connected to the infrared receiver 151 The air cylinder 136 controls the moving rod 135 to move. When the operator sends a variable speed signal, the infrared transmitter 152 is controlled to send a signal. At this time, the output shaft 13 drives the drive plate 133 to rotate, and the infrared receiver 151 that cooperates with the infrared transmitter 152 first receives the signal, and then controls the cylinder there. 136 drives the moving rod 135 to move, so that the arc plate 134 moves in the direction of the second driven gear 131, so that the arc plate 134 contacts and engages with the belt 132, and then as the output shaft 13 continues to rotate, the second infrared ray receives The device 151 cooperates with the infrared transmitter 152. At this time, the second infrared receiver 151 controls the cylinder 136 to control the arc plate 134 there to move to the previous arc plate 134, and back and forth in turn, so that each arc plate 134 gradually extends When the third driven gear is formed on the same plane as the second driven gear 131, when the third driven gear is not needed, the user sends a signal again, so that the infrared receiver 151 that first cooperates with the infrared transmitter 152 receives the signal. signal, at this time, the air cylinder 136 is controlled to drive the moving rod 135 to move in the opposite direction, so that the arc plate 134 moves away from the second driven gear 131, so that the arc plate 134 is separated from the belt 132, and then along with the output shaft 13, the second infrared receiver 151 cooperates with the infrared transmitter 152. At this time, the second infrared receiver 151 controls the cylinder 136, and controls the arc plate 134 there to move away from the belt 132, and goes back and forth in turn. Each arc-shaped plate 134 is gradually separated from the belt 132 so that the belt 132 is gradually meshed with the second driven gear 131 again.

As shown in FIG. 2 and FIG. 3 , the drive plate 133 is provided with guide rods 16 at both ends of the moving rod 135 , and the guide rods 16 are slidably connected with the arc-shaped plate 134 . The action of the guide rod 16 increases the stability of the movement of the arc-shaped plate 134 .

As shown in FIG. 2 and FIG. 4 , the limiting member includes a drive shaft 17 disposed on the upper end of the swing rod 121 , both ends of the drive shaft 17 are rotatably connected to the inner wall of the gearbox 1 , and the outer wall of the drive shaft 17 is coaxially provided with a fourth driven shaft Gear 171 , a motor 172 is provided on the inner wall of the gearbox 1 , and a fifth driven gear 173 that meshes with the fourth driven gear 171 is coaxially provided on the rotating shaft of the motor 172 . At this time, the motor 172 drives the fourth driven gear 171 to rotate through the fifth driven gear 173 , which in turn causes the drive shaft 17 to rotate, so that the position of the pendulum rod 121 changes.

As shown in FIG. 2 and FIG. 4 , the first driven gear 122 is provided with a control member that enables the motor 172 to change the rotation of the swing rod 121 as the third driven gear and the second driven gear 131 mesh with the belt 132 .

As shown in FIG. 2 and FIG. 4 , the control member includes a pressure sensor 18 disposed on the wheel surface of the first driven gear 122 and controlling the rotation of the motor 172 . The pressure sensor 18 interferes with the belt 132 .

The motor 172 is provided with an adjustment module that controls the operation of the motor 172. The pressure sensor 18 collects the pressure value D acting on the first driven gear 122 by the belt 132, and transmits the collected pressure value D to the adjustment module, which is used for A control signal is generated according to the pressure value D, and the electric motor 172 is used to control the forward and reverse rotation of the fifth driven gear 173 according to the control signal;

The preset distance includes a preset value 1 and a preset value 2. The preset value 1 is the driving gear 12 , the first driven gear 122 and the second driven gear 131 connected by the belt 132 when the belt 132 is tensioned. The pressure value of the movable gear 122;

The second preset value is the pressure value on the first driven gear 122 when the belt 132 is tensioned when the driving gear 12, the first driven gear 122 and the third driven gear are connected by the belt 132;

The control signal includes a first signal and a second signal. When the pressure value D is greater than the preset value one and less than the preset value two, the adjustment module on the electric motor 172 generates the first signal according to the pressure value D. When D is less than the preset value one, the adjustment module on the electric motor 172 generates a second signal according to the pressure value D;

The motor 172 responds to the first signal to make the fifth driven gear 173 rotate forward, which in turn drives the drive shaft 17 to rotate, so that the swing rod 121 swings toward the output shaft 13, and the motor 172 responds to the second signal to make the fifth driven gear 173 reverse. rotate, and then drive the drive shaft 17 to rotate, so that the swing rod 121 swings away from the output shaft 13 .

The control signal also includes a third signal. When the pressure value D is equal to the preset value one or the preset value two, the adjustment module on the electric motor 172 generates a third signal according to the pressure value D, and the electric motor 172 responds to the third signal to make the fifth driven The gear 173 stops rotating.

When the belt 132 moves from the second driven gear 131 to the third driven gear, the pressure sensor 18 senses that the pressure of the belt 132 acting on the first driven gear 122 gradually increases, and the motor 172 makes the fifth driven gear 122 gradually increase. The driving gear 173 rotates forward, which in turn drives the driving shaft 17 to rotate, so that the swing rod 121 swings toward the output shaft 13, so that the belt 132 can be tightened again until the pressure value reaches the preset value of 2. When the belt 132 is driven from the third driven gear When moving to the second driven gear 131, the pressure sensor 18 senses that the pressure exerted by the belt 132 on the first driven gear 122 gradually decreases. At this time, the motor 172 makes the fifth driven gear 173 reverse, thereby driving the drive The shaft 17 rotates, so that the pendulum rod 121 swings away from the output shaft 13, so that the belt 132 can be tightened again until the pressure value reaches a preset value of one.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. An electric vehicle transmission, comprising a gearbox (1), a motor (11) is provided in the gearbox (1), and a drive gear (12) is coaxially provided on the outer wall of the rotating shaft of the motor (11), It is characterized in that a swing rod (121) is hinged on the inner wall of the gearbox (1), and a first driven gear (122) is rotatably connected to the end of the swing rod (121) away from the gearbox (1). The inner wall of the box (1) is provided with a limiter for restricting the swing of the pendulum rod (121), and the inner wall of the gearbox (1) is rotatably connected with an output shaft (12) between the driving gear (12) and the first driven gear (122). 13), the outer wall of the output shaft (13) is coaxially provided with a second driven gear (131), and the drive gear (12), the first driven gear (122) and the second driven gear (131) pass through The belt (132) is connected, one end of the output shaft (13) extends out of the outer wall of the gearbox (1), the outer wall of the output shaft (13) is provided with a drive disc (133), and the drive disc (133) is provided with The third driven gear is coaxial with the second driven gear (131), and the drive plate (133) is provided with a driving member for connecting the third driven gear with the belt (132). 2. The electric vehicle transmission according to claim 1, wherein the third driven gear comprises a plurality of arc-shaped plates (134) spliced with each other, and the outer surfaces of each of the arc-shaped plates (134) are A plurality of driving teeth are provided, and the driving member includes a moving rod (135) which is passed through the driving disc (133) and corresponds to the arc-shaped plate (134). One end of the moving rod (135) is connected to the arc-shaped The plate (134) is connected, and the other end extends out of the side of the drive disc (133) away from the second driven gear (131), and the drive disc (133) is provided with a side away from the second driven gear (131). A cylinder (136) that drives each moving rod (135) to move. 3 . The electric vehicle transmission according to claim 2 , characterized in that, an inner wall of one side of the arc-shaped plate ( 134 ) is provided with an arc-shaped bending rod ( 14 ), and the bending rod ( 14 ) is far away from the One end of the arc-shaped plate (134) is provided with a collision block (141) that collides with the inner wall of the adjacent arc-shaped plate (134). 134) An embedding block (142) for embedding the interference block (141) is provided on the inner wall, and the embedding block (142) enters the area of the bent rod (14). 4. An electric vehicle transmission according to claim 3, characterized in that, a drive plate (15) extending into the space formed by the belt (132) is provided on the inner wall of the transmission case (1), and the drive plate (15) extends into the space formed by the belt (132). The outer wall of the disc (133) is provided with an infrared receiver (151) in the circumferential direction of the cylinder (136) corresponding to the moving rod (135) on the arc-shaped plate (134) and controlling the movement of the moving rod (135). (15) is provided with an infrared transmitter (152), when the infrared receiver (151) receives the signal sent by the infrared transmitter (152), the cylinder (136) connected to the infrared receiver (151) Control the movement of the moving rod (135). 5. The electric vehicle transmission according to claim 4, characterized in that, the drive disc (133) is provided with guide rods (16) at both ends of the moving rod (135), and the guide rods (16) ) is slidably connected with the arc plate (134). 6. An electric vehicle transmission according to claim 1 or 2, characterized in that the limiting member comprises a drive shaft (17) disposed on the upper end of the swing rod (121), and the drive shaft (17) has a drive shaft (17). Both ends are rotatably connected to the inner wall of the gearbox (1), the outer wall of the drive shaft (17) is coaxially provided with a fourth driven gear (171), and the inner wall of the gearbox (1) is provided with a motor (172) A fifth driven gear (173) meshing with the fourth driven gear (171) is coaxially arranged on the rotating shaft of the motor (172). 7. The electric vehicle transmission according to claim 6, wherein the first driven gear (122) is provided with the motor (172) to follow the third driven gear and the second driven gear (131) A control member for changing the rotation of the pendulum lever (121) by engaging with the belt (132). 8. An electric vehicle transmission according to claim 7, characterized in that the control element comprises a pressure sensor (18) arranged on the wheel surface of the first driven gear (122) and controlling the rotation of the electric motor (172). ), the pressure sensor (18) interferes with the belt (132). 9. An electric vehicle transmission according to claim 8, characterized in that, the electric motor (172) is provided with an adjustment module for controlling the operation of the electric motor (172), and the pressure sensor (18) collects the belt (132) acting on the The pressure value D on the first driven gear (122), and the collected pressure value D is transmitted to the adjustment module, the adjustment module is used to generate a control signal according to the pressure value D, and the electric motor (172) is used to The control signal controls the forward and reverse rotation of the fifth driven gear (173); The preset distance includes a preset value 1 and a preset value 2, and the preset value 1 is the belt when the driving gear (12), the first driven gear (122) and the second driven gear (131) are connected by the belt (132). (132) pressure value on the first driven gear (122) when tensioned; The second preset value is the pressure on the first driven gear (122) when the belt (132) is tensioned when the driving gear (12), the first driven gear (122) and the third driven gear are connected by the belt (132). value; The control signal includes a first signal and a second signal. When the pressure value D is greater than the preset value one and less than the preset value two, the adjustment module on the motor (172) generates the first signal according to the pressure value D, and when the pressure value D is greater than the preset value one and less than the preset value two When the pressure value D is less than the preset value one, the adjustment module on the electric motor (172) generates a second signal according to the pressure value D; The motor (172) causes the fifth driven gear (173) to rotate forward in response to the first signal, thereby driving the drive shaft (17) to rotate, so that the pendulum rod (121) swings in a direction close to the output shaft (13), the motor (172) In response to the second signal, the fifth driven gear (173) is reversed, thereby driving the drive shaft (17) to rotate, so that the swing rod (121) swings away from the output shaft (13). 10 . The electric vehicle transmission according to claim 9 , wherein the control signal further comprises a third signal, and when the pressure value D is equal to a preset value 1 or a preset value 2, the electric motor The adjustment module on (172) generates a third signal according to the pressure value D, and the electric motor (172) stops the rotation of the fifth driven gear (173) in response to the third signal.

Images