Gear ring disconnecting structure

Abstract

The utility model relates to the technical field of vehicle electric driving, in particular to a gear ring disconnecting device. The gear ring comprises a gear ring shell and a shell cover, an adjusting sleeve is arranged in an inner cavity of the gear ring shell, a ring sleeve inner spline is arranged on the surface of an inner ring of the adjusting sleeve, a ring flange outer spline is arranged on the surface of an outer ring of an output flange, and the flange outer spline and the ring sleeve inner spline are connected in a meshed mode. And a disconnection executing mechanism is arranged on the outer side of the shell cover, penetrates through the shell cover and is connected with the adjusting sleeve, and the disconnection executing mechanism can push the adjusting sleeve to move axially, so that the adjusting sleeve is disengaged from the output flange. The disconnection executing mechanism drives the push plate to move axially to enable the adjusting sleeve and the output flange to be meshed and disengaged, so that torque transmission between the gear ring shell and the output flange is disconnected, the disconnected related transmission parts can stop high-speed rotation, reverse electromotive force loss of high-speed rotation of the motor is reduced, and the service life of the motor is prolonged. And the rotational torque loss of the related transmission part.

Description

Technical Field

[0001] This utility model relates to the field of vehicle electric drive technology, and in particular to a gear ring disconnection device. Background Technology

[0002] With the development of new energy vehicles, more and more models will be equipped with electric four-wheel drive, meaning that both the front and rear axles are driven by electric motors. Electric drive systems on a single axle can be further divided into typical structures such as a single motor + reduction gearbox + differential, or a dual motor + dual reduction gearbox + electronically controlled differential structure. These drive systems mostly use permanent magnet synchronous motors, which are widely used in high-performance electric vehicles on the current market due to their high efficiency and power density.

[0003] New energy vehicles equipped with four-wheel drive using permanent magnet synchronous motors generate back electromotive force (EMF) at high speeds, resulting in additional energy consumption and increased vehicle power consumption, thus affecting the vehicle's economic efficiency. Therefore, a disconnection structure for the vehicle's electric drive is needed. This structure should be able to disconnect the power transmission of the electric drive system on one axle at high speeds, allowing the entire vehicle to be driven solely by the electric drive system on the other axle. The disconnected electric drive system's motor and related transmission components should stop rotating at high speeds, reducing back EMF losses from high-speed motor rotation and torque losses from related transmission components. Utility Model Content

[0004] This application addresses the shortcomings of the existing production technology by providing a gear ring disconnection structure. Under high-speed vehicle operation, the axial movement of the push plate driven by the disconnection actuator can disengage the adjusting sleeve and the output flange, thereby disconnecting the torque transmission between the gear ring housing and the output flange. The disconnected transmission components can stop rotating at high speed, reducing the back electromotive force loss of the high-speed motor and the rotational torque loss of the transmission components.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A gear ring disconnection structure includes a gear ring housing and a housing cover. An opening is provided on one side of the gear ring housing, and a housing cover capable of closing the opening is provided at the opening. An adjusting sleeve is provided within the inner cavity of the gear ring housing. An external spline is provided on the outer surface of the adjusting sleeve, and an internal spline is provided along the circumferential direction within the inner cavity of the gear ring housing. The external spline of the sleeve and the internal spline of the gear ring are meshed together. An output flange is provided within the inner cavity of the gear ring housing. The two end faces of the output flange respectively abut against the inner surface of the gear ring housing and the inner surface of the housing cover. An internal spline is provided on the inner surface of the adjusting sleeve, and an external spline is provided on the outer surface of the output flange. The external spline of the flange and the internal spline of the sleeve are meshed together. An internal spline is provided on the inner surface of the output flange. A disconnection actuator is provided on the outer side of the housing cover. The disconnection actuator passes through the housing cover and connects to the adjusting sleeve. The disconnection actuator can push the adjusting sleeve axially, causing the adjusting sleeve and the output flange to disengage.

[0007] Furthermore, the gear ring housing and the cover are connected as one unit by multiple bolts.

[0008] Furthermore, both the external splines of the sleeve and the internal splines of the gear ring are straight-tooth splines.

[0009] Furthermore, both the external splines of the flange and the internal splines of the sleeve are dog-tooth splines.

[0010] Furthermore, a spring is installed between the adjusting sleeve and the gear ring housing. The left and right ends of the spring press against the inner wall of the gear ring housing and the left side wall of the adjusting sleeve, respectively. The spring can force the right end face of the adjusting sleeve to abut against the inner end face of the housing cover.

[0011] Furthermore, the disconnecting actuator includes an electromagnetic coil and a push plate. One end of the push plate contacts the electromagnetic coil, and the other end of the push plate passes through the housing cover and contacts the adjusting sleeve.

[0012] Furthermore, a shim is placed between the push plate and the electromagnetic coil, with the two end faces of the shim contacting the side of the push plate and the armature end face of the electromagnetic coil, respectively.

[0013] Furthermore, the push plate facing the adjusting sleeve is provided with multiple axial jaws and multiple circumferential jaws along the circumferential direction, which are distributed alternately. The adjusting sleeve facing the push plate is provided with multiple axial supports and multiple circumferential supports along the circumferential direction, which are distributed alternately. The multiple axial supports and multiple axial jaws are set in a corresponding manner, and the axial jaws and axial supports are in abutting connection. The multiple circumferential supports and multiple circumferential jaws are set in a corresponding manner, and the circumferential supports are set in the limiting groove of the circumferential jaws.

[0014] Furthermore, the cover is provided with multiple through claw grooves along the circumferential direction, which can accommodate multiple axial claws and multiple circumferential claws on the push plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] The disconnecting actuator of this invention drives the push plate to move axially, thereby disengaging the adjusting sleeve and the output flange, thus disconnecting the torque transmission between the gear ring housing and the output flange. The disconnected transmission parts can stop high-speed rotation, reducing the back electromotive force loss of the high-speed motor and the rotational torque loss of the transmission parts. This invention redesigns and integrates the disconnecting structure and transmission components without changing the envelope size of the gear ring, resulting in a more compact and reasonable structure that effectively reduces the axial size of the overall structure. The transmission component of the disconnecting structure of this invention uses a dog-tooth spline feature, which can effectively transmit large torques and has only a small rotational backlash, providing a stable and reliable torque transmission solution. Attached Figure Description

[0017] Figure 1 This is an exploded view of the present invention.

[0018] Figure 2 This is a half-sectional view of the front view of this utility model.

[0019] Figure 3 This is a schematic diagram of the adjustment sleeve and push plate of this utility model.

[0020] The components are: 1. Gear ring housing; 2. Spring; 3. Adjusting sleeve; 4. Output flange; 5. Housing cover; 6. Bolt; 7. Push plate; 8. Gasket; 9. Electromagnetic coil; 10. Gear ring internal spline; 11. Sleeve external spline; 12. Sleeve internal spline; 13. Flange external spline; 14. Flange internal spline; 16. Claw groove; 17. Axial clasp; 18. Circumferential clasp; 19. Axial support; 20. Circumferential support. Detailed Implementation

[0021] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, a gear ring disconnection structure includes a gear ring housing 1 and a housing cover 5. An opening is provided on one side of the gear ring housing 1, and a housing cover 5 is provided at the opening to close the opening. The gear ring housing 1 and the housing cover 5 are connected as one piece by multiple bolts 6.

[0023] like Figure 1 and Figure 2 As shown, an adjusting sleeve 3 is provided in the inner cavity of the gear ring housing 1. A ring of internal splines 10 is provided in the inner cavity of the gear ring housing 1 along the circumferential direction. A ring of external splines 11 is provided on the outer surface of the adjusting sleeve 3. The external splines 11 and the internal splines 10 of the gear ring are meshed and connected. Both the external splines 11 and the internal splines 10 of the gear ring are straight tooth splines.

[0024] like Figure 1 and Figure 2 As shown, a spring 2 is provided between the adjusting sleeve 3 and the gear ring housing 1. The left and right ends of the spring 2 press against the inner wall of the gear ring housing 1 and the left side wall of the adjusting sleeve 3, respectively. The spring 2 can force the right end face of the adjusting sleeve 3 to abut against the inner end face of the cover 5, thereby achieving axial positioning and installation of the adjusting sleeve 3.

[0025] like Figure 1 and Figure 2 As shown, an output flange 4 is provided in the inner cavity of the gear ring housing 1. The two end faces of the output flange 4 abut against the inner side of the gear ring housing 1 and the inner side of the housing cover 5, respectively, thereby realizing the axial positioning and installation of the output flange 4.

[0026] like Figure 1 and Figure 2 As shown, the inner ring surface of the adjusting sleeve 3 is provided with a ring of internal splines 12, and the outer ring surface of the output flange 4 is provided with a ring of external splines 13. The external splines 13 and the internal splines 12 are meshed and connected. Both the external splines 13 and the internal splines 12 are dog-tooth splines. The inner ring surface of the output flange 4 is provided with a ring of internal splines 14, which can mesh and connect with the external splines of the drive half-shaft assembled to the gearbox to realize torque output.

[0027] like Figure 1 and Figure 2 As shown, a disconnection actuator is provided on the outside of the housing cover 5. The disconnection actuator passes through the housing cover 5 and connects to the adjusting sleeve 3. The disconnection actuator can push the adjusting sleeve 3 to move axially against the pressure of the spring 2, so that the adjusting sleeve 3 and the output flange 4 are disengaged, realizing the transmission disconnection operation. At the same time, the adjusting sleeve 3 always maintains engagement with the gear ring housing 1 during the axial movement.

[0028] like Figure 1 and Figure 2 As shown, the disconnection actuator includes an electromagnetic coil 9 and a push plate 7. One end of the push plate 7 contacts the electromagnetic coil 9, and the other end of the push plate 7 passes through the housing cover 5 and contacts the adjusting sleeve 3. In the energized working state, the armature of the electromagnetic coil 9 can move axially, the armature pushes the push plate 7 to move axially, and the push plate 7 in turn pushes the adjusting sleeve 3 to move axially.

[0029] When in use, the electromagnetic coil 9 can be divided into different working states depending on the energization status: energized execution process, energized maintenance state, de-energized return process, and de-energized stable state.

[0030] When the electromagnetic coil 9 is energized, its armature moves axially and indirectly pushes the adjusting sleeve 3 through the shim 8 and push plate 7. This overcomes the mechanical friction of the system and further compresses the spring 2. The axial movement causes the adjusting sleeve 3 to engage (or disengage) with the spline joint of the output flange 4. Depending on the relative axial positions of the adjusting sleeve 3 and the output flange 4, the designer can determine whether the purpose of energizing is to engage or disengage the spline joint of the adjusting sleeve 3 and the output flange 4, based on the actual needs of the vehicle.

[0031] When the electromagnetic coil 9 is in the energized state: When the electromagnetic coil 9 is energized, the armature of the electromagnetic coil 9 will push the adjusting sleeve 3 axially to the final position, that is, the dog tooth spline pair is fully engaged (or disengaged). At this time, in order to maintain the position of the connecting sleeve 3, it is only necessary to overcome the elastic force of the spring 2 at this position. Therefore, the current can be reduced, and the electrical coil 9 can maintain a small electromagnetic force, thus optimizing the power consumption of the energized state.

[0032] During the de-energization and return process of electromagnetic coil 9: When the power-on maintenance state needs to be terminated according to the instructions of the vehicle, electromagnetic coil 9 is de-energized, and there is no longer any electromagnetic force applied to the adjusting sleeve 3. Relying on the elastic force of spring 2, the adjusting sleeve 3 is pressed back and moved until the dog tooth spline pair is completely disconnected (or connected).

[0033] Stable state after de-energization of electromagnetic coil 9: The final stable state after de-energization of electromagnetic coil 9 is that the adjusting sleeve 3 will move to abut against the inner end face of the cover 5, and the armature of electromagnetic coil 9 will be pushed back to its original position by the push plate 7 and the shim 8.

[0034] During the connection / disconnection operation, in order to reduce frictional wear caused by the relative rotation of the push plate 7 and the electromagnetic coil 9, such as... Figure 1 As shown, a shim 8 is provided between the push plate 7 and the electromagnetic coil 9, and the two end faces of the shim 8 contact the side of the push plate 7 and the armature end face of the electromagnetic coil 9, respectively.

[0035] like Figure 3 As shown, the push plate 7, facing the adjusting sleeve 3, has multiple axial jaws 17 and multiple circumferential jaws 18 arranged circumferentially, with the axial jaws 17 and circumferential jaws 18 distributed alternately. The adjusting sleeve 3, facing the push plate 7, has multiple axial supports 19 and multiple circumferential supports 20 arranged circumferentially, with the axial supports 19 and circumferential supports 20 distributed alternately. The axial supports 19 and axial jaws 17 are arranged in a one-to-one correspondence, and the axial jaws 17 and axial supports 19 abut against each other, achieving axial positioning connection between the adjusting sleeve 3 and the push plate 7. The multiple circumferential supports 20 and circumferential jaws 18 are arranged in a one-to-one correspondence, with the front end of the circumferential support 20 positioned in the limiting groove of the circumferential jaw 18. The limiting groove of the circumferential jaw 18 restricts the circumferential movement of the circumferential support 20, thereby achieving circumferential positioning connection between the adjusting sleeve 3 and the push plate 7.

[0036] like Figure 1 As shown, the cover 5 has multiple through-holes 16 arranged along the circumferential direction. The claw grooves 16 can accommodate multiple axial claws 17 and multiple circumferential claws 18 on the push plate 7.

[0037] In operation, this invention disengages the adjusting sleeve 3 from the output flange 4 by axially moving the push plate 7 through the disconnecting actuator, thereby breaking the torque transmission between the gear ring housing 1 and the output flange 4. This invention can disengage the adjusting sleeve from the output flange by axially moving the push plate through the disconnecting actuator, thus breaking the torque transmission between the gear ring housing and the output flange. The disconnected transmission components can stop high-speed rotation, reducing the back electromotive force loss of the high-speed motor and the rotational torque loss of the related transmission components.

[0038] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A ring gear split structure comprising a ring gear housing (1) and a housing cover (5), characterized in that: An opening is provided on one side of the gear ring housing (1), and a cover (5) capable of closing the opening is provided at the opening; an adjusting sleeve (3) is provided in the inner cavity of the gear ring housing (1), and an outer spline (11) is provided on the outer surface of the adjusting sleeve (3), and an inner spline (10) is provided in the inner cavity of the gear ring housing (1) along the circumferential direction, and the outer spline (11) of the sleeve and the inner spline (10) of the gear ring are meshed and connected; an output flange (4) is provided in the inner cavity of the gear ring housing (1), and the two end faces of the output flange (4) respectively abut against the inner surface of the gear ring housing (1) and the cover (5). On the inner side of the adjusting sleeve (3), a sleeve body spline (12) is provided on the inner ring surface, and an outer flange spline (13) is provided on the outer ring surface of the output flange (4). The outer flange spline (13) and the sleeve body spline (12) are meshed and connected. An inner flange spline (14) is provided on the inner ring surface of the output flange (4). A disconnecting actuator is provided on the outer side of the shell cover (5). The disconnecting actuator passes through the shell cover (5) and connects to the adjusting sleeve (3). The disconnecting actuator can push the adjusting sleeve (3) to move axially, so that the adjusting sleeve (3) and the output flange (4) are disengaged.

2. A toothed ring disconnecting structure according to claim 1, characterized in that: The gear ring housing (1) and the cover (5) are connected as one unit by multiple bolts (6).

3. A toothed ring disconnecting structure according to claim 1, characterized in that: Both the external spline (11) of the sleeve and the internal spline (10) of the gear ring are straight tooth splines.

4. A toothed ring disconnecting structure according to claim 1, characterized in that: Both the external spline (13) of the flange and the internal spline (12) of the sleeve are dog-tooth splines.

5. A toothed ring disconnecting structure as claimed in claim 1, characterized in that: A spring (2) is provided between the adjusting sleeve (3) and the gear ring housing (1). The left and right ends of the spring (2) press against the inner wall of the gear ring housing (1) and the left side wall of the adjusting sleeve (3) respectively. The spring (2) can force the right end face of the adjusting sleeve (3) to abut against the inner end face of the cover (5).

6. A toothed ring disconnecting structure according to claim 1, characterized in that: The disconnection actuator includes an electromagnetic coil (9) and a push plate (7). One end of the push plate (7) is in contact with the electromagnetic coil (9), and the other end of the push plate (7) passes through the cover (5) and contacts the adjusting sleeve (3).

7. A toothed ring disconnecting structure according to claim 6, characterized in that: A gasket (8) is provided between the push plate (7) and the electromagnetic coil (9), with the two end faces of the gasket (8) contacting the side of the push plate (7) and the armature end face of the electromagnetic coil (9) respectively.

8. A toothed ring disconnecting structure according to claim 7, characterized in that: The push plate (7) facing the adjusting sleeve (3) has multiple axial jaws (17) and multiple circumferential jaws (18) arranged in the circumferential direction. The multiple axial jaws (17) and multiple circumferential jaws (18) are arranged alternately. The adjusting sleeve (3) facing the push plate (7) has multiple axial supports (19) and multiple circumferential supports (20) arranged in the circumferential direction. The multiple axial supports (19) and multiple circumferential supports (20) are arranged alternately. The multiple axial supports (19) and multiple axial jaws (17) are arranged in a corresponding manner. The axial jaws (17) and axial supports (19) are in contact connection. The multiple circumferential supports (20) and multiple circumferential jaws (18) are arranged in a corresponding manner. The circumferential supports (20) are arranged in the limiting groove of the circumferential jaws (18).

9. A toothed ring disconnecting structure according to claim 8, characterized in that: The shell cover (5) is provided with a plurality of through claw grooves (16) along the circumferential direction. The claw grooves (16) can accommodate a plurality of axial claws (17) and a plurality of circumferential claws (18) on the push plate (7) through which they pass.

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