CN206377264U - The gear automatic speed variator of electric automobile two with centrifugal globe arm engagement device - Google Patents

Abstract

The utility model discloses a second-speed automatic transmission for an electric vehicle with a centrifugal ball arm joint device. The keyway friction plate relies on the friction between the steel plate with the outer spline groove and the friction plate with the inner spline groove to realize the second gear transmission of the transmission. The utility model has the advantages of small size, high transmission efficiency and smooth shifting.

Description

Electric vehicle second-speed automatic transmission with centrifugal ball arm joint

technical field

The utility model belongs to the technical field of electric vehicle transmission, and relates to an automatic transmission for electric vehicles, more precisely a second-speed automatic transmission for electric vehicles with a centrifugal ball arm joint device.

Background technique

Automatic transmissions are widely used in various vehicles such as automobiles, electric vehicles, and construction machinery. The existing automatic transmissions mainly include hydromechanical automatic transmission (AT), metal belt continuously variable automatic transmission (CVT), mechanical automatic transmission (AMT) and dual clutch automatic transmission (DCT). The shifting process of the above four types of automatic transmissions is controlled by an electronically controlled hydraulic servo device. The hydraulic servo device is composed of a hydraulic pump, multiple hydraulic valves, multiple hydraulic clutches, multiple hydraulic brakes, etc., with complex structure and low cost. High, high energy consumption during operation.

With the wide application of automotive electronic technology, automatic control technology and automotive network communication technology, automotive wire control technology has become the future development trend of automobiles. The car X-By-Wire technology is to replace the mechanical and hydraulic systems by wires, electronic controllers and wire-controlled actuators, and convert the driver's manipulation actions into electrical signals through sensors, which are input to the electronic control unit, and are controlled by the electronic control unit. The electronic control unit generates control signals to drive the wire-controlled actuators to perform required operations. Therefore, the development of a new type of automatic transmission by wire is conducive to reducing the number of its components, reducing costs and energy consumption, and improving transmission efficiency.

Utility model content

The purpose of this utility model is to overcome the deficiencies of various existing automatic transmission technologies, and provide a new type of second-gear automatic transmission for electric vehicles with a centrifugal ball arm joint device that can realize power shifting, and has high reliability and low cost. transmission.

The technical scheme of the utility model is as follows:

A second-speed automatic transmission for electric vehicles with a centrifugal ball arm joint device, including an input shaft, an output shaft, a sun gear, a planetary gear, a planetary gear shaft, a rear planet carrier, and an inner ring gear; one end of the planetary gear shaft is fixedly installed on the rear On the planet carrier, the rear planet carrier is fixedly installed on the intermediate journal of the output shaft through its central bearing hole.

It is characterized in that it also includes a centrifugal ball arm joint device.

The centrifugal ball arm joint device includes a thrust pressure plate, a driven inner spline hub, a centrifugal ball arm hollow disc, a centrifugal ball arm pin, a centrifugal ball arm, a centrifugal ball, and a centrifugal ball socket.

The centrifugal ball arm hollow wheel is fixedly installed on the intermediate journal of the input shaft, one end of the input shaft is fixedly connected to one end of the output shaft of the motor, and the other end of the input shaft is fixedly installed with the sun gear; the centrifugal ball The other end of the arm hollow disc away from the motor is provided with a plurality of centrifugal ball arm supports evenly distributed along the circumferential direction, and a centrifugal ball arm pin is fixedly installed on each centrifugal ball arm support; One end is sleeved on the intermediate journal of the centrifugal ball arm pin through its smooth bearing hole, and the centrifugal ball arm can rotate freely around the centrifugal ball arm pin. The other end of the centrifugal ball arm is provided with a centrifugal ball socket, and each A centrifugal ball is installed in each centrifugal ball socket, and each centrifugal ball can roll freely in the centrifugal ball socket.

One end surface of the thrust pressure plate is a smooth surface; each of the centrifugal balls is against the smooth surface of the thrust pressure plate; an external spline groove is also provided on the outer peripheral surface of the thrust pressure plate, and the thrust pressure plate The outer spline groove of the disk is axially slidingly engaged with the inner spline groove of the driven inner spline hub; the end surface of the driven inner spline hub away from the motor is fixedly connected with the other end of the planetary wheel shaft.

Compared with the prior art, the utility model has the advantages of:

(1) The second-speed automatic transmission for electric vehicles with the centrifugal ball arm joint device of the present utility model cancels the main joint device, synchronizer and shift fork mechanism of the traditional transmission, and uses the method of directly controlling the motor speed to realize gear shifting, which simplifies The structure is improved, the cost is reduced, and the failure rate is also reduced;

(2) The transmission gears of the second-speed automatic transmission of the electric vehicle with the centrifugal ball arm joint device of the utility model are constantly meshed, and there is no need to cut off the power during the shifting process, which reduces the shifting impact and improves the acceleration performance and driving performance of the car. comfort;

(3) In the second-speed automatic transmission for electric vehicles with the centrifugal ball arm joint device of the present invention, the centrifugal ball arm joint device pushes the thrust pressure plate and the steel sheet with the outer spline groove to the friction plate with the inner spline groove under the action of centrifugal force The input shaft transmits the input torque of the motor to the output shaft by relying on the friction between the steel sheet with the outer spline groove and the friction plate with the inner spline groove, which is small in size, light in weight, large in transmission torque, high in speed and high in transmission efficiency.

Description of drawings

Fig. 1 is a schematic structural view of a second-speed automatic transmission for an electric vehicle with a centrifugal ball arm joint device according to an embodiment of the present invention.

In the figure: 1. Input shaft 2. Output shaft 3. Sun gear 4. Planetary gear 5. Planetary gear shaft 6. Rear planet carrier 7. Ring gear 10. Centrifugal ball arm joint device 10a. Friction plate with inner spline groove 10b. Steel sheet with outer spline groove 10c. Thrust pressure plate 10ca. Smooth surface 10d. Driven inner spline hub 10e. Driven inner spline hub end cover 10j. Centrifugal ball arm hollow wheel disc 10k. Centrifugal ball arm pin 10l. Centrifugal Ball arm 10m. Centrifugal ball 10p. Centrifugal ball arm return spring 10r. Centrifugal ball socket 31A. Rear housing 40Z. Second shaft front bearing 50Z. Second shaft rear bearing 100. Motor 100A. Motor output shaft.

detailed description

Below in conjunction with the accompanying drawings in the utility model embodiment, the technical solution in the utility model embodiment is described in detail, obviously, the described embodiment is only a part of the utility model embodiment, rather than all embodiments; For the embodiments in the utility model, all other embodiments obtained by persons of ordinary skill in the art without creative work belong to the scope of protection of the utility model.

As shown in Figure 1, a second-speed automatic transmission for electric vehicles with a centrifugal ball arm joint device of the present invention includes an input shaft 1, an output shaft 2, a sun gear 3, a planetary gear 4, a planetary gear shaft 5, and a rear planet carrier 6. Ring gear 7, centrifugal ball arm joint device 10.

The end of the input shaft 1 close to the motor 100 is provided with an internal spline, and the input shaft 1 is connected with the motor output shaft 100A through the internal spline; 1. The center line of the output shaft 2 coincides, and the second shaft front bearing 40Z is fixedly installed in the bearing seat hole; the input shaft 1 is connected to the front journal of the output shaft 2 through the second shaft front bearing 40Z; the end of the input shaft 1 is far away from the motor 100 The sun gear 3 is fixedly connected to the outer journal of the shaft.

There is a central cylindrical through hole on the end surface of the planetary gear 4, and a sliding bush is fixedly installed in the central cylindrical through hole, and the planetary gear 4 is rolled and installed on the planetary gear shaft 5 through the sliding bush; the planetary gear 4 is constantly meshed with the sun gear 3; One end of the planet wheel shaft 5 is fixedly connected to the rear planet carrier 6 through the cylindrical bearing hole provided on the rear planet carrier, and the other end is fixed to the driven inner spline hub 10d through the cylindrical bearing hole provided on the driven inner spline hub 10d connect.

The center of the end face of the rear planet carrier 6 is provided with a central cylindrical through hole, the center line of the central cylindrical through hole coincides with the center line of the input shaft 1 and the output shaft 2, and the rear planet carrier 6 passes through its central cylindrical through hole, relying on the shaft The shoulder and heel retaining ring is fixedly installed on the intermediate journal of the output shaft 2.

The inner ring gear 7 is fixedly installed on the rear housing 31A through a retaining ring, and the rear housing 31A is fixedly connected to the transmission housing through bolts, and the output shaft 2 is supported and installed on the rear housing 31A through the second rear bearing 50Z; the inner gear ring 7 The centerline of the input shaft 1 and the centerline of the output shaft 2 coincide, and the ring gear 7 is in constant mesh with the planetary gear 4.

Centrifugal ball arm joint device 10 includes friction plate with inner spline groove 10a, steel plate with outer spline groove 10b, thrust pressure plate 10c, driven inner spline hub 10d, driven inner spline hub end cover 10e, centrifugal ball arm Hollow roulette 10j, centrifugal ball arm pin 10k, centrifugal ball arm 10l, centrifugal ball 10m, centrifugal ball arm return spring 10p, centrifugal ball socket 10r.

As shown in Figure 1, the friction plate 10a with inner spline groove is fitted on the outer spline groove on the input shaft 1 through its inner spline groove; the steel sheet with outer spline groove 10b is fitted on the driven inner spline hub 10d through the outer spline groove On the inner spline groove; one end surface of the thrust pressure plate 10c is a smooth surface 10ca, and the other end surface of the thrust pressure plate 10c is a rough friction surface; the outer peripheral surface of the thrust pressure plate 10c is also provided with an external spline groove, and the thrust pressure plate 10c The outer spline groove of the driven inner spline hub 10d is axially slidingly engaged with the inner spline groove of the driven inner spline hub 10d; one end of the driven inner spline hub 10d close to the motor 100 is fixedly connected to the driven inner spline hub end cover 10e by bolts, away from One end of the motor 100 is fixedly connected to the planetary wheel shaft 5; the centrifugal spherical arm hollow wheel 10j is fixedly installed on the input shaft 1, and the other end of the centrifugal spherical arm hollow wheel 10j away from the motor 100 is provided with a plurality of uniformly distributed along the circumferential direction. Centrifugal ball arm bearings, a centrifugal ball arm pin 10k is fixedly installed on each centrifugal ball arm support; one end of the centrifugal ball arm 10l is sleeved on the intermediate journal of the centrifugal ball arm pin 10k through its smooth bearing hole, so that The centrifugal ball arm 10l can rotate freely around the centrifugal ball arm pin 10k, and the other end of the centrifugal ball arm 10l is provided with a centrifugal ball socket 10r, and a centrifugal ball 10m is installed in each centrifugal ball socket 10r, and each centrifugal ball 10m The centrifugal ball and socket 10r can roll freely.

The working principle of the electric vehicle second-speed automatic transmission with the centrifugal ball arm joint device is further described below in conjunction with the embodiments:

In first-gear transmission, the motor 100 rotates at a low speed, and the rotation speed has never reached the critical speed for gear shifting of the centrifugal ball arm joint device. Since the centrifugal ball arm hollow wheel 10j is fixedly connected to the input shaft 1, the centrifugal ball arm hollow wheel 10j The rotational speed of the centrifugal ball arm 10l is also low, and when the horizontal component force of the centrifugal force produced by the centrifugal ball arm hollow wheel 10j due to the low rotational speed of the centrifugal ball arm is not enough to overcome the elastic force of the centrifugal ball arm return spring 10p, the thrust pressure plate 10c and belt The outer spline groove steel sheet 10b is separated from the inner spline groove friction plate 10a under the elastic force of the return spring, and the centrifugal ball arm joint device 10 does not work; at this time, the input torque of the motor 100 is transmitted to the sun gear 3 through the input shaft 1 , the sun gear 3 transmits power to the rear planetary carrier 6 fixedly connected with the planetary wheel shaft 5 through the constant meshing planetary gear 4, and the rear planetary carrier 6 passes through its central through hole, and is fixedly installed on the output shaft 2 by means of the shaft shoulder and the retaining ring Therefore, the input shaft 1 transmits this torque to the output shaft 2.

In the second gear transmission, with the gradual increase of the speed of the motor 100, the speed of the centrifugal ball arm hollow wheel 10j also gradually increases. When the speed reaches the critical speed of the centrifugal ball arm joint device shifting, the centrifugal ball The arm 10l overcomes the gravity produced by itself and the elastic force of the centrifugal ball arm return spring 10p to make a circular motion outwards around the centrifugal ball arm pin 10k along the axial center symmetrical smooth surface 10ca of the thrust pressure plate 10c. At the same time, due to the centrifugal ball 10m can roll freely in the centrifugal ball socket 10r, therefore, while the centrifugal ball 10m moves circularly with the centrifugal ball arm pin 10l, the component force of the centrifugal force generated along the horizontal direction overcomes the elastic force of the return spring to push the thrust pressure plate 10c And the steel sheet with external spline groove 10b moves towards the friction plate with internal spline groove 10a, so that the thrust pressure plate 10c and the steel sheet with external spline groove 10b and the friction plate with internal spline groove 10a are pressed against each other, relying on the friction between each other The force enables the driven inner spline hub 10d to rotate synchronously with the input shaft 1 , thereby transmitting the torque input from the input shaft 1 to the output shaft 2 .

The transmission route of the first gear is: when the motor 100 rotates at a low speed, the centrifugal ball arm joint device 10 does not work, and the torque of the motor 100 is transmitted to the sun gear 3 through the input shaft 1. Since the ring gear 7 is fixedly installed on the rear housing 31A The planetary gear 4 is rollingly mounted on the planetary gear shaft 5 through a sliding bush, and one end of the planetary gear shaft 5 is fixedly connected with the rear planet carrier 6. The planetary gear 4 is constantly meshed with the sun gear 3 and the ring gear 7, so the input shaft 1 The input torque is further transmitted to the rear planetary carrier 6, and because the rear planetary carrier 6 is fixedly installed on the intermediate journal of the output shaft 2 through its central through hole, the input shaft 1 transmits the torque to the output shaft 2, thereby realizing First gear transmission.

The transmission route of the second gear is as follows: the torque of the electric motor 100 is transmitted to the input shaft 1. Since the rotational speed of the centrifugal ball arm joint device reaches the critical rotational speed for gear shifting, the driven inner spline hub 10d rotates synchronously with the input shaft 1, and the torque of the electric motor 100 The torque of the motor 100 is transmitted to the input shaft 1 through the spline, and since the driven inner spline hub 10d rotates synchronously with the input shaft 1, the torque of the motor 100 is transmitted to the driven inner spline hub 10d, and because the driven inner spline hub 10d passes through The planet wheel shaft 5 is fixedly connected with the rear planet carrier 6, and the rear planet carrier 6 is fixedly installed on the intermediate journal of the output shaft 2 through its central through hole. Therefore, the torque of the motor 100 is transmitted to the output shaft 2, thereby realizing the second gear transmission.

The transmission route of the reverse gear is as follows: the electric motor 100 reverses and the rotation speed is low, the centrifugal ball arm joint device 10 does not work, the torque of the electric motor 100 is transmitted to the sun gear 3 through the input shaft 1, because the ring gear 7 is fixedly installed on the rear casing 31A is fixed, the planetary gear 4 is rollingly mounted on the planetary gear shaft 5 through a sliding bush, one end of the planetary gear shaft 5 is fixedly connected with the rear planet carrier 6, and the planetary gear 4 is constantly meshed with the sun gear 3 and the inner ring gear 7, so The torque input by the input shaft 1 is further transmitted to the rear planet carrier 6, and because the rear planet carrier 6 is fixedly installed on the intermediate journal of the output shaft 2 through its central through hole, the input shaft 1 transmits the torque to the output shaft 2 , to achieve reverse gear transmission.

Neutral gear: the electric motor 100 is stopped to realize neutral gear.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments. Various changes are made.

Claims (1)

1. a kind of gear automatic speed variator of electric automobile two with centrifugal globe arm engagement device, including input shaft (1), output shaft (2), Sun gear (3), planetary gear (4), planet wheel spindle (5), rear planet carrier (6), ring gear (7)；One end of the planet wheel spindle (5) is consolidated Dingan County is on rear planet carrier (6), and the rear planet carrier (6) is fixedly mounted on the centre of output shaft (2) by its center bearing bore On axle journal；It is characterized in that：

It also includes centrifugal globe arm engagement device (10)；

It is hollow that the centrifugal globe arm engagement device (10) includes thrust platen (10c), driven internal spline hub (10d), centrifugal globe arm Wheel disc (10j), centrifugal globe arm pin (10k), centrifugal globe arm (10l), centrifugal globe (10m), centrifugation ball-and-socket (10r)；

The hollow wheel disc of centrifugal globe arm (10j) is fixedly mounted on the intermediate journal of input shaft (1), the input shaft (1) One end is fixedly connected on motor output shaft (100A) one end, and sun gear is fixedly mounted in the other end of the input shaft (1) (3)；The other end of the remote motor (100) of the hollow wheel disc of centrifugal globe arm (10j) is uniformly distributed circumferentially provided with multiple Centrifugal globe arm bearing, a centrifugal globe arm pin (10k) is fixedly mounted on each centrifugal globe arm bearing；The centrifugal globe arm The one end of (10l) is sleeved on by its smooth bearing bore on the intermediate journal of centrifugal globe arm pin (10k), the centrifugal globe arm (10l) Can freely it be rotated around centrifugal globe arm pin (10k), the other end of the centrifugal globe arm (10l) is provided with a centrifugation ball-and-socket (10r), institute State and a centrifugal globe (10m) is installed in each centrifugation ball-and-socket (10r), each centrifugal globe (10m) is in centrifugation ball-and-socket (10r) It is interior freely to roll；

The end face of the thrust platen (10c) is shiny surface (10ca)；Each centrifugal globe (10m) is resisted against thrust platen On the shiny surface (10ca) of (10c)；External splines groove, the thrust pressure are additionally provided with the outer circumference surface of the thrust platen (10c) The external splines groove of disk (10c) slides axially with both inner spline grooves of driven internal spline hub (10d) and engaged；Driven internal spline hub Remote motor (100) end face of (10d) is fixedly connected with the other end of planet wheel spindle (5).