CN214499999U

CN214499999U - Electrically-driven axle gear shifting mechanism

Info

Publication number: CN214499999U
Application number: CN202120021099.9U
Authority: CN
Inventors: 徐秀良; 许电波; 孔卓; 秦厚明; 卜云德; 袁其旺; 葛洪升
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd; China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-10-26
Anticipated expiration: 2031-01-05

Abstract

The application provides an electrically driven axle gearshift relates to vehicle axle technical field, including return spring, declutch shift shaft, shift fork, cylinder, axle, first gear, slip meshing cover and second gear, return spring and cylinder set up respectively at the both ends of declutch shift shaft, the middle part at the declutch shift shaft is cup jointed to the one end of shift fork, and the other end cup joints epaxially through the slip meshing cover, and first gear and second gear cup joint the both sides at epaxial slip meshing cover respectively. The application provides an electrically driven axle gearshift to reach and directly provide thrust by the cylinder, have and to provide great thrust for the shift fork, can overcome great inertia's beneficial effect.

Description

Electrically-driven axle gear shifting mechanism

Technical Field

The application relates to vehicle axle technical field, concretely relates to electrically-driven axle gearshift.

Background

From the technical development trend of new energy automobile electric drive systems at home and abroad, the development is generally towards the integration and integration of power systems. A driving motor, a gearbox, an axle and the like are integrated as electric drive assembly products in disputes in domestic and foreign vehicle enterprises. Through the integrated design, the volume and weight of the assembly can be reduced, and the power, the volume and the torque density of the system are improved.

At present, electric drive axle adopts electronic the shifting more, and the motor passes through reduction gears and realizes that the deceleration increases the turn round, has lead screw or ball mechanism between declutch shift shaft and shift fork, converts the moment of torsion into thrust, is about to rotate and converts linear motion into. The motor is limited by space, generally, the motor is small, the torque is extremely small, and in order to improve the torque, the speed reducing mechanism has a large speed reducing ratio and is complex. The lead screw or ball screw has high requirements on environmental conditions such as lubrication.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, this application provides an electrically driven axle gearshift to reach and directly provide thrust by the cylinder, have and can provide great thrust for the shift fork, can overcome great inertia's beneficial effect.

The application provides an electrically driven axle gearshift, including return spring, declutch shift shaft, shift fork, cylinder, axle, first gear, slip meshing cover and second gear, return spring and cylinder set up respectively at the both ends of declutch shift shaft, the one end of shift fork is cup jointed at the middle part of declutch shift shaft, and the other end cup joints epaxially through slip meshing cover, and first gear and second gear cup joint the both sides at epaxial slip meshing cover respectively.

Preferably, the cylinder includes cylinder piston and cylinder body, the left and right sides of cylinder body is equipped with the air inlet respectively, be equipped with sensor round pin and the displacement sensor who is used for perception sensor round pin position on the cylinder body.

Preferably, one end of the shifting fork shaft is provided with a spring cavity cylinder, the return spring is sleeved on the shifting fork shaft and is arranged in the spring cavity cylinder, the return spring comprises a bushing, a first snap spring, a second snap spring, a first check ring, a second check ring, a first spring and a second spring, the first snap spring and the second snap spring are sleeved on the shifting fork shaft, the first check ring and the second check ring are arranged between the first snap spring and the second snap spring, and the first spring and the second spring are arranged between the first check ring and the second check ring.

Preferably, a first bearing is arranged between the shaft and the first gear.

Preferably, a second bearing is arranged between the shaft and the second gear.

Preferably, the joint of the shaft and the bushing is provided with an external spline, the sliding meshing sleeve is provided with an internal spline, and the first gear and the second gear are both provided with external splines.

The beneficial effect of this application lies in:

the utility model provides an electrically driven axle gearshift, cylinder and return spring distribute and mainly subtract both sides at the axle, generally fix cylinder and return spring cylinder at main subtracting the shell or main subtracting the shell by the bolt and cover. The utility model provides a axle and gear distribute in the axle housing or in the main shell that reduces, as the partly transmission moment of torsion and the rotational speed of reduction gear. The vehicle provides a gas source with certain pressure for the cylinder and a control valve, or the control valve is integrated on the cylinder of the invention. Can directly provide thrust by the cylinder to it is great that general commercial car provides atmospheric pressure, can provide great thrust for the shift fork. The gear shifting device can overcome large moment of inertia and realize gear shifting.

In addition, the design principle of the application is reliable, the structure is simple, and the application prospect is very wide.

Drawings

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

Fig. 1 is a partial schematic view of an electrically driven axle shift mechanism according to an embodiment of the present application.

FIG. 2 is a cross-sectional structural schematic view of an electrically driven axle shift mechanism in an embodiment of the present application.

Fig. 3 is a schematic diagram of an application structure of an electrically driven axle shift mechanism according to an embodiment of the present application.

In the figure, 1, a return spring, 2, a shifting fork shaft, 3, a shifting fork, 4, a cylinder, 5, a shaft, 6, a first gear, 7, a sliding meshing sleeve, 8, a second gear, 9, a second bearing, 11, a spring cavity cylinder, 12, a lining, 13, a first snap spring, 14, a first retainer ring, 15, a first spring, 16, a second spring, 17, a second retainer ring, 18, a second snap spring, 19, a shell, 20, a cylinder piston, 21, a sensor pin, 22, a displacement sensor, 23, a cylinder body, 24 and a first bearing.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following explains key terms appearing in the present application.

As shown in fig. 1, the application provides an electrically-driven axle gearshift, including return spring 1, declutch shift shaft 2, shift fork 3, cylinder 4, axle 5, first gear 6, slip meshing cover 7 and second gear 8, return spring 1 cover is established at the left end of declutch shift shaft 2, cylinder 4 sets up the right-hand member at declutch shift shaft 2, the upper end of shift fork 3 is cup jointed at the middle part of declutch shift shaft 2, and the lower extreme cup joints on axle 5 through slip meshing cover 7. The first gear 6 and the second gear 8 are respectively sleeved on the left side and the right side of the sliding meshing sleeve 7 on the shaft 5.

The shifting fork shaft 2 is controlled by the air cylinder 4 and the return spring 1, and the sliding meshing sleeve 7 is shifted by the shifting fork 3 so as to realize torque transmission between the shaft 5 and the first gear 6, or torque transmission between the shaft 5 and the second gear 8, or torque transmission between the shaft 5 and the first gear 6 and torque transmission between the shaft 5 and the second gear 8.

As shown in fig. 2, the cylinder 4 includes a cylinder piston 20 and a cylinder block 23, air inlets are respectively disposed on the left and right sides of the cylinder block 23, the vehicle will be a left air inlet, or a right air inlet, the air pressure is communicated, and the piston is pushed to move to the right, or to move to the left by the corresponding cavity air pressure. The cylinder body 23 is provided with a sensor pin 21 and a displacement sensor 22 for sensing the position of the sensor pin 21, and the displacement sensor 22 senses the position of the sensor pin 21 and sends the position to a vehicle control system to determine a gear and prevent gear disengagement.

As shown in fig. 2, a spring cavity cylinder 11 is arranged at one end of the shift fork shaft 2, and the return spring 1 is sleeved on the shift fork shaft 2 and arranged in the spring cavity cylinder 11, so that the shift fork shaft 2 makes a linear motion along a fixed track and is not abraded. The return spring 1 comprises a bushing 12, a first clamp spring 13, a second clamp spring 18, a first retainer ring 14, a second retainer ring 17, a first spring 15 and a second spring 16, the first clamp spring 13 and the second clamp spring 18 are sleeved on the shifting fork shaft 2, the first retainer ring 14 and the second retainer ring 17 are arranged between the first clamp spring 13 and the second clamp spring 18, and the first spring 15 and the second spring 16 are arranged between the first retainer ring 14 and the second retainer ring 17.

The first clamp spring 13 and the second clamp spring 18 are respectively installed on the shifting fork shaft 2 and respectively compress the first spring 15 and the second spring 16 through the first retainer ring 14 and the second retainer ring 17, and the tension provided by the first spring 15 and the second spring 16 provides gear disengaging power and neutral gear retaining force for the gear shifting mechanism.

When the declutch shift shaft 2 moves leftwards, the first retainer ring 14 is not moved, and the second clamp spring 18 pushes the second retainer ring 17 to compress the spring. The force of pushing the shifting fork to push the sliding sleeve is obtained by subtracting the spring tension from the cylinder thrust. When the gear is shifted back, the air cylinder releases pressure, and the tension of the spring pushes the shifting fork shaft 2 through the second retainer ring 17 and the second clamp spring 18. Until the first circlip 13 contacts the first retainer ring 14, and the second retainer ring 17 returns to contact the housing 19.

When the shifting fork shaft 2 moves rightwards, the second retainer ring 17 is not moved, and the first clamp spring 13 pushes the first retainer ring 14 to compress the first spring 15 and the second spring 16. The force of pushing the shifting fork to push the sliding sleeve is obtained by subtracting the spring tension from the cylinder thrust. When the gear is shifted back, the air cylinder releases pressure, and the tension of the spring pushes the shifting fork shaft 2 through the first retainer ring 14 and the first clamp spring 13. Until the second circlip 18 contacts the second retainer ring 17 and the first retainer ring 14 returns to contact the spring chamber cylinder 11.

A first bearing 10 is arranged between the shaft 5 and the first gear 6, and a second bearing 9 is arranged between the shaft 5 and the second gear 8, so that the shaft 50, the first gear 6 and the second gear 8 do not need to have the same rotating speed. The joint of the shaft 50 and the sliding sleeve is provided with an external spline, and the sliding engagement sleeve 7 is provided with an internal spline. The first gear 6 and the second gear 8 are both provided with external splines. The slip spline is always engaged with the spline of the shaft 5. The sliding meshing sleeve 7 is moved leftwards, so that an internal spline of the sliding sleeve is combined with an external spline of the first gear 6, and torque is transmitted between the shaft 5 and the first gear 6. Or the sliding meshing sleeve 7 is moved rightwards, so that the internal spline of the sliding sleeve is combined with the external spline of the second gear 8, and the torque is transmitted between the shaft 5 and the second gear 8. Or the sliding engagement sleeve 7 is in the middle position, the shaft 50 and the first gear 6 and the second gear 8 do not transmit torque.

The utility model provides an electrically driven axle gearshift can directly provide thrust by the cylinder to it is great that general commercial car provides atmospheric pressure, can provide great thrust for the shift fork. The gear shifting device can overcome large moment of inertia and realize gear shifting.

Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electrically driven axle gearshift, characterized in that: including return spring (1), declutch shift shaft (2), shift fork (3), cylinder (4), axle (5), first gear (6), slip meshing cover (7) and second gear (8), return spring (1) and cylinder (4) set up respectively at the both ends of declutch shift shaft (2), the one end of shift fork (3) is cup jointed at the middle part of declutch shift shaft (2), and the other end cup joints on axle (5) through slip meshing cover (7), and the both sides of slip meshing cover (7) are cup jointed respectively on axle (5) in first gear (6) and second gear (8).

2. The electrically driven axle shift mechanism of claim 1, wherein: the air cylinder (4) comprises an air cylinder piston (20) and an air cylinder body (23), air inlets are formed in the left side and the right side of the air cylinder body (23) respectively, and a sensor pin (21) and a displacement sensor (22) used for sensing the position of the sensor pin (21) are arranged on the air cylinder body (23).

3. The electrically driven axle shift mechanism of claim 1, wherein: one end of declutch shift shaft (2) is equipped with spring chamber jar (11), return spring (1) cover is on declutch shift shaft (2) and sets up in spring chamber jar (11), return spring (1) includes bush (12), first jump ring (13), second jump ring (18), first retaining ring (14), second retaining ring (17), first spring (15) and second spring (16), first jump ring (13) and second jump ring (18) cover are established on declutch shift shaft (2), first retaining ring (14) and second retaining ring (17) set up between first jump ring (13) and second jump ring (18), first spring (15) and second spring (16) set up between first retaining ring (14) and second retaining ring (17).

4. The electrically driven axle shift mechanism of claim 1, wherein: a first bearing (10) is arranged between the shaft (5) and the first gear (6).

5. The electrically driven axle shift mechanism of claim 4, wherein: a second bearing (9) is arranged between the shaft (5) and the second gear (8).

6. The electrically driven axle shift mechanism of claim 3, wherein: the shaft (5) and the bush (12) are combined to form an external spline, the sliding meshing sleeve (7) is provided with an internal spline, and the first gear (6) and the second gear (8) are both provided with external splines.