WO2025010615A1 - Power decoupling device - Google Patents

Abstract

A power decoupling device, comprising: a first shaft; a second shaft provided with a spiral wall on the outer wall thereof; a gear ring that is torsionally sleeved outside the second shaft, axially moves relative to the second shaft and is used for being coupled with or decoupled from the first shaft; and an execution assembly comprising an execution sleeve fixed in the circumferential direction and rotatably connected to the gear ring, and a shift pin connected to the execution sleeve in a penetrating mode so as to drive the execution sleeve to move in the axial direction, wherein the shift pin moves relative to the execution sleeve in the radial direction so as to abut against or be separated from the spiral wall. The shift pin passes through the execution sleeve to abut against the spiral wall located on the second shaft, and the shift pin moves in the axial direction, to realize decoupling of the gear ring and the first shaft. When the shift pin is fixed in the axial position, in a decoupling state of the device, the shift pin moves relative to the execution sleeve in the axial direction and is separated from the spiral wall, avoiding continued friction between the shift pin and the spiral wall, and prolonging the service life.

Description

Power decoupling device Technical Field

The present invention relates to the technical field of power transmission, and in particular to a power decoupling device.

Background Art

In electric vehicles, it is very important and meaningful to reduce the consumption of electric energy as much as possible. Four-wheel drive (4WD) vehicles include two electric drive axles, the front electric drive axle and the rear electric drive axle. Sometimes, according to the actual road conditions, the four-wheel drive (4WD) needs to be switched to two-wheel drive (2WD) to save some electric energy.

One of the main trends is to add a decoupling device (also called a disconnecting device) to the side shaft of the auxiliary electric drive axle. The decoupling device is usually provided with a toggle element, which toggles the sliding element on the output shaft to move axially to achieve decoupling of the output shaft from the input shaft.

However, in the related art, especially in the electromagnet-driven decoupling device, after the output shaft is decoupled from the input shaft, the output shaft still rotates driven by the wheel. Since the toggle element and the sliding element are often in direct contact and sliding friction, the contact surface between the toggle element and the driven element is easily worn, which is not conducive to the long-term use of the decoupling device.

In addition, in the related art, a position sensor magnet is usually installed on the sliding element to determine the state of decoupling or coupling. However, since the sliding element is rotating, in order to avoid accurate measurement, a larger annular magnet is usually required, which is costly and occupies a large radial space, which is not conducive to matching with the gearbox.

Summary of the invention

In order to overcome the problems existing in the related art, the present invention provides a power decoupling device.

According to a first aspect of an embodiment of the present invention, the present invention provides a power decoupling device, comprising: a first shaft; a second shaft, wherein the outer wall of the second shaft is provided with a spiral wall; a gear ring, which is sleeved on the outside of the second shaft in a torsion-proof manner and moves axially relative to the second shaft, and is used to move with the first shaft; Shaft coupling or decoupling; and an actuator assembly, including: an actuator sleeve, fixed in the circumferential direction and rotationally connected to the gear ring; a push pin, which is penetrated and connected to the actuator sleeve to drive the actuator sleeve to move in the axial direction, and the push pin moves radially relative to the actuator sleeve to achieve abutment or separation with the spiral wall.

In some embodiments, the actuator assembly further includes a drive sleeve, which abuts against the radial outer end of the push pin, and is used to drive the push pin to move radially relative to the actuator sleeve by the drive sleeve moving radially along the actuator sleeve.

In some embodiments, the drive sleeve is provided with a stepped hole, which includes: a large hole, which is used to abut against the radial outer end of the push pin and push the push pin to move radially; and a small hole, which is located in the middle of the large hole, which is used to accommodate the radial outer end of the push pin, so that the push pin moves radially outward to separate from the spiral groove, and axially limits the radial outer end of the push pin.

In some embodiments, the actuator assembly further includes a reset spring, and an annular retaining ring is provided at the radial outer end of the push pin. Both ends of the reset spring abut between the retaining ring and the outer wall of the actuator sleeve to push the push pin to move radially outward.

In some embodiments, a first limiting member is provided at the radial inner end of the push pin, and the first limiting member is used to abut against the inner wall of the actuator sleeve to limit the push pin from radially disengaging from the actuator sleeve.

In some embodiments, the outer wall of the gear ring is provided with a circumferentially extending annular groove, and the actuator sleeve is provided with a connecting pin, the radial inner end of the connecting pin is located in the annular groove, so that the gear ring is rotatably connected to the actuator sleeve.

In some embodiments, the power decoupling device also includes: a sensor magnet, which is fixed to the outer wall of the actuator sleeve; and a shell, the inner wall of the shell is provided with an axially extending sliding groove, and the radial outer side of the sensor magnet is axially movable in the sliding groove.

In some embodiments, a second limiter is axially disposed on the inner wall of the shell, and the second limiter is used to abut against the end surface of the actuator sleeve close to the first axis to limit the position of the actuator sleeve moving axially toward the first axis.

In some embodiments, the execution assembly further includes: an execution pin, the execution pin and the The drive sleeve is transmission-connected; the electromagnet is energized to drive the actuator pin to move radially, thereby driving the drive sleeve to move radially.

In some embodiments, the actuator assembly further includes an actuator spring, which is sleeved on the outside of the second shaft and abuts against the actuator sleeve to push the actuator sleeve to move toward the first shaft.

The technical solution provided by the embodiment of the present invention may include the following beneficial effects: by connecting the toggle pin with the actuating sleeve, the toggle pin is allowed to be always connected to the actuating sleeve in the radial direction, and when moving in the axial direction, the actuating sleeve and the gear ring can be driven to move axially in turn, thereby realizing the decoupling of the gear ring from the first shaft. The spiral wall is located on the outer wall of the second shaft, and the toggle pin can move radially relative to the actuating sleeve, so that the toggle pin is fixed in the axial position to keep the power decoupling device in a decoupled state, and the toggle pin can be separated from the spiral wall. Compared with the related art, the toggle pin is prevented from continuing to rub against the spiral wall in the decoupled state, thereby extending the service life.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

FIG1 is an exploded view of a power decoupling device according to an exemplary embodiment;

FIG2 is a schematic structural diagram of the second shaft in FIG1 ;

FIG3 is an exploded view of a partial structure of the execution component in FIG1 ;

FIG4 shows a cross-sectional view of the power decoupling device at the connection between the connecting pin of the actuator sleeve and the annular groove of the gear ring;

FIG5 shows a cross-sectional view of the power decoupling device, wherein the power decoupling device is in a coupled state;

FIG6 is a partial enlarged view of the toggle pin in FIG5 ;

FIG7 shows a cross-sectional view of the power decoupling device, wherein the power decoupling device is in an initial state of decoupling;

FIG. 8 shows a cross-sectional view of the power decoupling device, wherein the power decoupling device is in a final state of decoupling.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

In the present invention, unless otherwise specified, axial direction A and radial direction R refer to axial direction A and radial direction R of the first axis or the second axis respectively; radial outer side or radial outer end refers to the side away from the center axis O in Figures 5, 7 and 8 in radial direction R, and radial inner side or radial inner end refers to the side close to the center axis O in radial direction R.

In addition, "transmission connection" refers to the ability to transmit driving force/torque between two components, and the two components can be directly connected or through various transmission mechanisms or connection structures to achieve the above functions. In addition, it should be understood that the term "torsion-resistant connection" refers to the connection between two elements in a manner that does not rotate relative to each other, which can be achieved through a press fit (i.e., an interference fit) or by forming the two components mentioned in one piece. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

In order to solve the above technical problems, the present invention provides a power decoupling device, which is usually used on the side shaft of the auxiliary electric drive axle. The power decoupling device is coupled when the electric vehicle is four-wheel drive (4WD for short), and the power decoupling device is decoupled when the electric vehicle is two-wheel drive (2WD for short).

As shown in FIG1 , the power decoupling device 100 may include a housing 10, a first shaft 20, a second shaft 30, a first bearing 40, a second bearing 50, and an oil seal 60. The housing 10 includes a first housing 11 and a second housing 12 which are separately arranged. The first housing 11 and the second housing 12 are detachably connected. The first housing 11 and the second housing 12 form a receiving space. Part of the shaft body of the first shaft 20 is located in the receiving space and is rotatably connected to the first housing 11 through the first bearing 40. The second shaft 30 is located in the receiving space and is rotatably connected to the second housing 12 through the second bearing 50. The oil seal 60 is arranged at the end of the second housing 12 away from the first housing 11.

The first shaft 20 or the second shaft 30 may be one of the input shaft and the output shaft. In order to more conveniently describe the power decoupling device 100 of the present invention, in this embodiment, the first shaft 20 is used as the input shaft. The second shaft 30 is taken as an output shaft for illustration, and one end of the second shaft 30 away from the first shaft 20 is used for transmission connection with a wheel (not shown in the figure).

In addition, the first shaft 20 and the second shaft 30 may be non-contact connected or contact connected. In this embodiment, the first shaft 20 and the second shaft 30 are coaxial, and the first shaft 20 and the second shaft 30 are connected by a needle bearing 41 and can rotate relative to each other, so that the first shaft 20 is more stable when transmitting power to the second shaft 30.

Furthermore, the power decoupling device 100 also includes a ring gear 70 and an actuator assembly 80 .

As shown in FIG2 , a spline 31 is provided at one axial end of the outer wall of the second shaft 30 close to the first shaft 20, and the ring gear 70 is torsionally connected to the second shaft 30 through the spline 31, and can move axially relative to the second shaft 30 through the spline 31. The actuator 80 is transmission-connected to the ring gear 70, and the actuator 80 drives the ring gear 70 to move axially on the second shaft 30. The axial movement of the ring gear 70 realizes coupling or decoupling with the first shaft 20, further realizes power transmission or power disconnection between the second shaft 30 and the first shaft 20, and realizes the conversion between four-wheel drive and two-wheel drive.

Preferably, the ring gear 70 and the first shaft 20 can be coupled by splines, or the ring gear 70 and the first shaft 20 can also be coupled by end face gears. In this embodiment, the ring gear 70 and the first shaft 20 are coupled by end face gears, which are strong. After the ring gear 70 and the first shaft 20 are coupled, slippage caused by broken teeth of the end face gear can be avoided, making the power transmission more stable.

Further, as shown in FIG. 3 , the actuator assembly 80 may include at least an actuator sleeve 81 (not shown in FIG. 3 ), a push pin 82 , a drive sleeve 83 , and an actuator spring 84 (not shown in FIG. 3 ).

Specifically, the executing sleeve 81 can be cylindrical and sleeved on the outside of the second shaft 30. The circumferential position of the executing sleeve 81 is fixed, but it can move axially relative to the second shaft 30, that is, the executing sleeve 81 cannot rotate but can only move axially. The executing sleeve 81 is rotatably connected to the ring gear 70. When the ring gear 70 rotates and the executing sleeve 81 moves axially, the executing sleeve 81 can drive the rotating ring gear 70 to move axially on the second shaft 30.

As shown in Figure 4, in this embodiment, the outer wall of the ring gear 70 is provided with a circumferentially extending annular groove 71, and the actuator sleeve 81 is provided with a connecting pin 811 at a position corresponding to the annular groove 71, and the radial inner end of the connecting pin 811 is located in the annular groove 71. Through the cooperation between the connecting pin 811 and the annular groove 71, the actuator sleeve 81 does not need to rotate with the rotation of the second shaft 30 or the ring gear 70, and can also drive the ring gear 70 to move axially in the axial direction, so as to realize the rotational connection between the ring gear 70 and the actuator sleeve 81.

In this embodiment, there is sliding friction between the connecting pin 811 and the annular groove 71. In some other embodiments, a bearing may also be provided at the radial inner end of the connecting pin 811 to ensure rolling friction between the connecting pin 811 and the annular groove 71, so as to reduce the wear between the connecting pin 811 and the gear ring 70 and extend the service life.

Furthermore, in the radial direction, the toggle pin 82 is connected to the actuating sleeve 81. Specifically, in the present embodiment, the actuating sleeve 81 is provided with a radial hole 812 which is radially through, and the toggle pin 82 is located in the radial hole 812 and can move radially relative to the actuating sleeve 81 in the radial hole 812. When the toggle pin 82 moves axially, the outer wall of the toggle pin 82 abuts against the hole wall of the radial hole 812 to drive the actuating sleeve 81 to move axially, thereby realizing the transmission connection between the toggle pin 82 and the actuating sleeve 81 in the axial direction.

Furthermore, a spiral wall 32 is provided on the outer wall of the second shaft 30 (as shown in FIG. 2 ), and the push pin 82 moves radially inward relative to the actuator sleeve 81 through the radial hole 812, so that the radial inner end of the push pin 82 abuts against the spiral wall 32 of the second shaft 30. The spiral wall 32 is driven to rotate by the rotation of the second shaft 30, and the spiral wall 32 interacts with the radial inner end of the push pin 82 to push the push pin 82 to move axially away from the first shaft 20, and then the push pin 82 drives the actuator sleeve 81 and the ring gear 70 to move axially away from the first shaft 20, thereby finally decoupling the ring gear 70 from the first shaft 20.

Furthermore, when the gear ring 70 and the first shaft 20 remain in the decoupled state, the push pin 82 moves radially outward through the radial hole 812, so that the radial inner end of the push pin 82 is separated from the spiral wall 32. From the above, it can be seen that the push pin 82 can move radially and axially relative to the second shaft 30.

Compared with the related art in which the spiral wall 32 is arranged on the outer wall of the actuating sleeve 81 or the gear ring 70, the present invention arranges the spiral wall 32 on the outer wall of the second shaft 30, so that the axial movement of the toggle pin 82 of the present invention can be driven by the second shaft 30, and after the toggle pin 82 moves radially and separates from the spiral wall 32, the radial hole 812 allows the toggle pin 82 to always remain connected to the actuating sleeve 81. If the axial position of the toggle pin 82 no longer changes, the axial positions of the actuating sleeve 81 and the gear ring 70 also remain stationary, so that the gear ring 70 and the first shaft 20 remain in a decoupled state, and the toggle pin 82 can also be separated from the spiral wall 32, avoiding continuous wear in the decoupled state and extending the service life.

Furthermore, the drive sleeve 83 is connected to the toggle pin 82 in a radial direction, and the radial outer end of the toggle pin 82 is located radially outside the actuating sleeve 81. The radial inner end of the push pin 82 abuts against the spiral wall 32 to drive the push pin 82 to move radially relative to the actuating sleeve 81 in the radial hole 812 , and to make the radial inner end of the push pin 82 abut against the spiral wall 32 .

Further, as shown in Figure 6, the outer wall of the drive sleeve 83 is a cylindrical structure, and a stepped hole is provided inside the drive sleeve 83. The opening of the stepped hole faces radially inward, and the stepped hole includes a large hole 831 and a small hole 832. The small hole 832 can be located in the middle of the large hole 831, and the hole depth of the small hole 832 is greater than the hole depth of the large hole 831.

When the large hole 831 of the drive sleeve 83 abuts against the radial outer end of the push pin 82, the push pin 82 can be driven to move radially inward relative to the actuator sleeve 81 in the radial hole 812, and the radial inner end of the push pin 82 abuts against the spiral wall 32 (as shown in Figure 7).

When the push pin 82 moves axially in a direction away from the first axis 20 under the action of the spiral wall 32, the radial outer end of the push pin 82 will leave the large hole 831 and enter the small hole 832. The depth of the small hole 832 is greater than the depth of the large hole 831, so that the push pin 82 moves radially outward relative to the actuator sleeve 81 in the radial hole 812. At this time, the radial inner end of the push pin 82 is separated from the spiral wall 32 (as shown in Figure 8).

In addition, the radial outer end of the push pin 82 is located in the small hole 832, and the inner wall of the small hole 832 can limit the position of the push pin 82 in the axial direction A by fixing the radial outer end of the push pin 82, so that the axial position of the push pin 82 can be fixed without adding an additional power control device, so that the ring gear 70 and the first shaft 20 are always kept in a decoupled state, and the push pin 82 is radially separated from the spiral wall 32, which is simple to operate, wear-free and without additional energy loss.

In some embodiments, as shown in FIG3 , the actuator assembly 80 further includes an actuator pin 85 and an electromagnet 86. Most of the structure of the actuator pin 85 is located inside the electromagnet 86, and the actuator pin 85 can move radially relative to the electromagnet 86. The radial inner end of the actuator pin 85 is in transmission connection with the drive sleeve 83; the electromagnet 86 is energized to drive the actuator pin 85 to move radially, so as to drive the drive sleeve 83 to move radially inward or radially outward. The electromagnet 86 is used as a switch to decouple or couple the ring gear 70 with the first shaft 20, so that the control is simple and the coupling speed is fast.

In some embodiments, as shown in Figure 6, the actuator assembly 80 also includes a reset spring 87, and the outer wall of the radial outer end of the push pin 82 is provided with an annular retaining ring 821, and the two ends of the reset spring 87 abut between the retaining ring 821 and the outer wall of the actuator sleeve 81, which is used to push the push pin 82 to move radially outward.

Specifically, when the driving sleeve 83 drives the toggle pin 82 to move radially inward through the large hole 831, the radial inner end of the toggle pin 82 abuts against the spiral wall 32, and the return spring 87 is in a compressed state. When the toggle pin 82 moves axially to align with the small hole 832, the return spring 87 releases the compression force to push the toggle pin 82 to move radially outward and snap into the small hole 832, and finally separate the radial inner end of the toggle pin 82 from the spiral wall 32. The radial movement of the toggle pin 82 is driven by the return spring 87, which is low in cost and simple in method, and does not need to occupy too much space.

In some embodiments, a first limit member 822 is provided at the radial inner end of the push pin 82, and the first limit member 822 is used to abut against the inner wall of the actuator sleeve 81 in the radial direction R. When the reset spring 87 drives the push pin 82 to move radially outward, the limit member 822 abuts against the actuator sleeve 81 to prevent the push pin 82 from being separated from the radial outer side of the actuator sleeve 81, and keep the push pin 82 always located in the radial hole 812 of the actuator sleeve 81, so that the push pin 82 and the actuator sleeve 81 always remain connected.

The first stopper 822 may be an annular baffle formed by extending axially from the radial inner end of the toggle pin 82, and the diameter of the annular baffle is greater than the diameter of the radial hole 812, thereby limiting the toggle pin 82 from being separated from the actuating sleeve 81. In this embodiment, the first stopper 822 at the radial inner end of the toggle pin 82 includes a first clamping groove 8221 and a first clamping spring 8222, the first clamping spring 8222 is located in the first clamping groove 8221, and the outer diameter of the first clamping spring 8222 is greater than the inner diameter of the radial hole 812, thereby limiting the radial movement of the toggle pin 82 and preventing it from being separated from the actuating sleeve 81.

During installation, first insert the push pin 82 from the radial outer side of the radial hole 812 and pass it out from the radial inner side, then clamp the first retaining spring 8222 in the first retaining groove 8221. The combination of the first retaining groove 8221 and the first retaining spring 8222 facilitates the assembly and installation of the push pin 82 and the actuator sleeve 81.

In some embodiments, the actuator assembly 80 also includes an actuator spring 84 , wherein the actuator spring 84 is sleeved on the outside of the second shaft 30 and abuts against an end of the actuator sleeve 81 away from the ring gear 70 or the first shaft 20 to push the actuator sleeve 81 to move toward the first shaft 20 .

Specifically, when the toggle pin 82 drives the actuating sleeve 81 to move axially, the actuating spring 84 is compressed. After the electromagnet 86 is powered off, the electromagnet 86 drives the actuating pin 85 to move radially outward, and then the actuating pin 85 drives the driving sleeve 83 to move radially outward. When the small hole 832 of the driving sleeve 83 no longer abuts the radial outer end of the toggle pin 82, the driving sleeve 83 releases the axial restriction on the toggle pin 82. At this time, the toggle pin 82 also loses the axial restriction A on the actuating sleeve 81 and the gear ring 70. When the braking force is applied, the actuating spring 84 releases the compression force, driving the actuating sleeve 81 to move toward the first shaft 20 , and the actuating sleeve 81 drives the gear ring 70 to move axially and couple with the first shaft 20 (as shown in FIG. 5 ).

In some embodiments, a second limiter 13 is axially disposed on the inner wall of the housing 10 , and the second limiter 13 is used to abut against the end surface of the actuator sleeve 81 close to the first shaft 20 to limit the position of the actuator sleeve 81 axially moving toward the first shaft 20 .

As shown in Figure 6, the second limit member 13 may include a second slot 131 and a second retaining spring 132. The second slot 131 is arranged on the inner wall of the shell 10 and is annular. The second retaining spring 132 is located in the second slot 131. The second slot 131 abuts against the actuator sleeve 81 to limit the axial movement of the actuator sleeve 81 toward the first shaft 20, thereby preventing the actuator sleeve 81 from excessively moving toward the first shaft 20 under the action of the actuator spring 84, resulting in excessive axial extrusion when the ring gear 70 is coupled to the first shaft 20, thereby damaging the end face gear between the ring gear 70 or the first shaft 20.

Next, the decoupling process of the entire power decoupling device 100 will be described in detail.

As shown in FIG. 5 , the power decoupling device 100 is in a coupled state.

The electromagnet 86 is not energized, and the actuator pin 85, the drive sleeve 83 and the push pin 82 have no radial movement tendency. The radial inner end of the push pin 82 does not abut against the spiral wall 32 under the action of the reset spring 87, and the push pin 82 does not generate any axial force A on the actuator sleeve 81. The actuator spring 84 applies a force to the actuator sleeve 81 and the ring gear 70 in the direction of the first shaft 20, so that the actuator sleeve 81 pushes the ring gear 70 to maintain coupling with the first shaft 20. At this time, the power decoupling device 100 is in a coupled state.

As shown in FIG. 7 , the power decoupling device 100 is in an initial state of decoupling.

When the electromagnet 86 is energized, the actuator pin 85 drives the driving sleeve 83 to move radially, so that the large hole 831 radially drives the pushing pin 82, and the radial inner end of the pushing pin 82 abuts against the spiral wall 32. Through the rotation of the second shaft 30, the spiral wall 32 applies a force to the pushing pin 82, pushing the pushing pin 82 to move axially away from the first shaft 20, and in turn drives the actuator sleeve 81 and the ring gear 70 to move axially, thereby realizing the decoupling of the ring gear 70 from the first shaft 20. At this time, the power decoupling device 100 is in an initial state of decoupling.

As shown in FIG. 8 , the power decoupling device 100 is in the final state of decoupling.

The electromagnet 86 continues to be energized, and the push pin 82 continues to move axially away from the first shaft 20 under the action of the spiral wall 32. When the small hole 832 of the cylinder 83 is released, the push pin 82 moves radially outward under the action of the reset spring 87 and is stuck in the small hole 832. At this time, the radial inner end of the push pin 82 is separated from the spiral wall 32 of the second shaft 30, and the small hole 832 fixes the axial position of the push pin 82, and the axial positions of the executing sleeve 81 and the ring gear 70 are also fixed. At this time, the power decoupling device 100 is in the final state of decoupling.

In some embodiments, as shown in Figure 1, the power decoupling device 100 also includes a shell 10 and a sensor magnet 90, and the sensor magnet 90 is fixed to the outer wall of the actuator sleeve 81 by a fastener 91; the inner wall of the shell 10 is provided with an axially extending sliding groove, and the radial outer side of the sensor magnet 90 can be axially moved in the sliding groove, and the sliding groove and the sensor magnet 90 are used to limit the circumferential rotation of the actuator sleeve 81.

The sensor magnet 90 is usually a permanent magnet, and the power decoupling device 100 is usually provided with a controller (not shown in the figure). The controller includes a Hall sensor. The Hall sensor is aligned with the sensor magnet 90 in the radial direction R. The sensor magnet 90 is fixed on the actuator sleeve 81. The axial movement of the actuator sleeve 81 drives the axial movement of the sensor magnet 90, causing the magnetic flux to change in the axial direction A. The Hall sensor determines the axial position of the actuator sleeve 81 by monitoring the change of the magnetic flux, thereby judging whether the power coupling device is in a coupled state or a decoupled state.

In the related art, the actuator sleeve 81 rotates with the ring gear 70, resulting in an uncertain circumferential position of the sensor magnet 90. Therefore, it is necessary to install an annular sensor magnet 90 on the outer wall of the actuator sleeve 81 or the ring gear 70, resulting in large radial space occupation and heavy mass.

Compared with the related art, the actuator sleeve 81 of the present invention is fixed circumferentially and does not rotate with the rotation of the second shaft 30 and the ring gear 70. Therefore, the sensor magnet 90 in the present invention does not need to be arranged in a ring shape. The sensor magnet 90 is small in size, light in weight and occupies little radial space, making the entire power decoupling device 100 more compact and easier to match with different types of user gearboxes, with high adaptability.

It is further understood that the terms "first", "second", etc. are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish structures of the same type from each other, and do not indicate a specific order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present invention, a first structure can also be referred to as a second structure, and similarly, a second structure can also be referred to as a first structure.

Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the following scope of rights.

It should be understood that the present invention is not limited to the precise structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the scope of the appended claims.

Claims (10)

A power decoupling device (100), comprising: First axis (20); A second shaft (30), wherein the outer wall of the second shaft (30) is provided with a spiral wall (32); a gear ring (70) which is sleeved on the outside of the second shaft (30) in a rotationally-resistant manner and moves axially relative to the second shaft (30) and is used for coupling or decoupling with the first shaft (20); and The execution component (80) includes: An execution sleeve (81) is fixed in the circumferential direction and is rotationally connected to the gear ring (70); A toggle pin (82) is connected to the actuating sleeve (81) to drive the actuating sleeve (81) to move in the axial direction. The toggle pin (82) moves relative to the actuating sleeve (81) in the radial direction to achieve contact with or separation from the spiral wall (32). The power decoupling device (100) according to claim 1, characterized in that: The actuator assembly (80) further comprises a drive sleeve (83), wherein the drive sleeve (83) abuts against the radial outer end of the push pin (82), and is used to drive the push pin (82) to move radially relative to the actuator sleeve (81) through the drive sleeve (83) moving radially along the actuator sleeve (81). The power decoupling device (100) according to claim 2, characterized in that: The driving sleeve (83) is provided with a stepped hole, and the stepped hole comprises: The large hole (831) is used to abut against the radial outer end of the push pin (82) and push the push pin (82) to move radially; and The small hole (832) is located in the middle of the large hole (831) and is used to accommodate the radial outer end of the push pin (82), so that the push pin (82) moves radially outward to separate from the spiral groove, and axially limits the radial outer end of the push pin (82). The power decoupling device (100) according to claim 1, characterized in that: The actuator assembly (80) further comprises a return spring (87), and an annular retaining ring (821) is provided at the radial outer end of the push pin (82), and both ends of the return spring (87) abut between the retaining ring (821) and the outer wall of the actuator sleeve (81) to push the push pin (82) to move radially outward. The power decoupling device (100) according to claim 4, characterized in that: A first limiting member (822) is provided at the radial inner end of the push pin (82), and the first limiting member (822) is used to abut against the inner wall of the actuating sleeve (81) to limit the push pin (82) from radially disengaging from the actuating sleeve (81). The power decoupling device (100) according to claim 1, characterized in that: The outer wall of the gear ring (70) is provided with a circumferentially extending annular groove (71), and the actuating sleeve (81) is provided with a connecting pin (811), the radial inner end of the connecting pin (811) is located in the annular groove (71), so that the gear ring (70) and the actuating sleeve (81) are rotatably connected. The power decoupling device (100) according to claim 1, characterized in that: The power decoupling device (100) further comprises: a sensor magnet (90), wherein the sensor magnet (90) is fixed to the outer wall of the actuator sleeve (81); and A housing (10), wherein the inner wall of the housing (10) is provided with an axially extending sliding groove, and the radial outer side of the sensor magnet (90) is axially movable in the sliding groove. The power decoupling device (100) according to claim 7, characterized in that: A second limiting member (13) is axially arranged on the inner wall of the housing (10), and the second limiting member (13) is used to abut against the end surface of the actuator sleeve (81) close to the first shaft (20) to limit the position of the actuator sleeve (81) moving axially toward the first shaft (20). The power decoupling device (100) according to claim 1, characterized in that: The execution component (80) further includes: an actuating pin (85), the actuating pin (85) being drivingly connected to the driving sleeve (83); An electromagnet (86) is energized to drive the actuating pin (85) to move radially, thereby driving the driving sleeve (83) to move radially. The power decoupling device (100) according to claim 1, characterized in that: The actuating assembly (80) further comprises an actuating spring (84), wherein the actuating spring (84) is sleeved on the outside of the second shaft (30) and abuts against the actuating sleeve (81) to push the actuating sleeve (81) to move toward the first shaft (20).