Power transmission device and vehicle

Abstract

The utility model relates to the technical field of vehicle transmission, and provides a power transmission device and a vehicle. The power transmission device comprises an input shaft and an output shaft sleeve which are in transmission connection through a linkage structure, a driving ring arranged on one of the input shaft and the output shaft sleeve, and a transmission ring and a first elastic reset piece which are arranged on the other one of the input shaft and the output shaft sleeve. The transmission ring is connected with the first elastic reset piece, the driving ring is driven to move in the axial direction to drive the transmission ring to rotate and enable the first elastic reset piece to store energy, when the transmission ring rotates, the linkage structure can be driven to disconnect transmission connection between the input shaft and the output shaft sleeve, and when driving of the driving ring is removed, the linkage structure can be driven to disconnect transmission connection between the input shaft and the output shaft sleeve. The first elastic reset piece releases energy to drive the transmission ring and the driving ring to reset, and the linkage structure is reset from the separation state to the connection state. According to the power transmission device, connection and separation of the input shaft and the output shaft sleeve can be achieved, and the development cost of a vehicle power part can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle transmission technical field, especially a kind of power transmission device. The utility model further relates to a kind of vehicle with the above-mentioned power transmission device. BACKGROUND

[0002] Currently, when using two-drive mode in four-wheel drive vehicle, there is energy consumption due to dragging decelerator or non-working motor, so the power disconnection of decelerator or non-working motor can realize lower vehicle drag torque, achieving the purpose of energy saving. In the existing design, the power cut-off of decelerator can be designed from the input end or the output end. However, the decelerator with power cut-off cannot be interchanged with the decelerator without power switching. If a decelerator with power cut-off function is designed, it needs to be redeveloped, which increases the development cost of vehicle power part. SUMMARY

[0003] Therefore, the utility model aims at providing a power transmission device to realize the engagement and disengagement of input shaft and output shaft sleeve, and help to reduce the development cost of vehicle power part.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A power transmission device, comprising an input shaft and an output shaft sleeve connected by a linkage structure, a driving ring provided on one of the input shaft and the output shaft sleeve, and a transmission ring and a first elastic return member provided on the other of the input shaft and the output shaft sleeve;

[0006] The transmission ring and the first elastic return member are connected, and when the driving ring is driven to move axially along the input shaft, it can drive the transmission ring to rotate and store energy in the first elastic return member;

[0007] When the transmission ring is rotated by the driving ring, the linkage structure can be enabled to disconnect the transmission connection between the input shaft and the output shaft sleeve. When the driving ring is removed, the first elastic return member can drive the transmission ring and the driving ring to reset, and the linkage structure is disabled.

[0008] Further, it further comprises a limiting structure; the limiting structure is located on the input shaft or the output shaft sleeve provided with the driving ring, and the limiting structure is used for limiting the driving ring during resetting.

[0009] Further, the limiting structure comprises a snap ring provided on the input shaft or the output shaft sleeve; the driving ring can be abutted on the snap ring when resetting.

[0010] Further, the driving ring is provided with a wedge-shaped protrusion, and the transmission ring is provided with a transmission block abutting against the wedge-shaped protrusion; when the driving ring moves along the axial direction of the input shaft, the transmission block is pushed by the wedge-shaped protrusion, so that the transmission ring can be rotated, and when the transmission ring is driven by the first elastic reset member, the transmission block can push the wedge-shaped protrusion, so that the driving ring is reset synchronously.

[0011] Further, the linkage structure comprises a pawl and an elastic member arranged on one of the input shaft and the output shaft sleeve, and a ratchet groove arranged on the other of the input shaft and the output shaft sleeve; the pawl is kept in the clamping state with the ratchet groove under the elastic pre-tightening force of the elastic member.

[0012] Further, the transmission ring is provided with a via hole through which the pawl passes; when the linkage structure is enabled by the transmission ring, the transmission ring can drive the pawl to be out of the via hole and be abutted against the outer wall of the transmission ring, and when the enabling of the linkage structure by the transmission ring is removed, the pawl passes through the via hole and is clamped on the ratchet.

[0013] Further, the pawl is a plurality of pawls arranged at intervals along the circumferential direction of the transmission ring, and the via hole is a plurality of via holes corresponding to the pawls.

[0014] Further, the transmission ring is provided with a guide surface guiding the pawl to be out of the via hole.

[0015] Further, the linkage structure comprises a pawl and an elastic member arranged on one of the input shaft and the output shaft sleeve, and a ratchet groove arranged on the other of the input shaft and the output shaft sleeve; the pawl is kept in the clamping state with the ratchet groove under the elastic pre-tightening force of the elastic member.

[0016] Compared with the prior art, the power transmission device has the following advantages:

[0017] The power transmission device comprises a driving ring, a transmission ring and a first elastic reset member, so that when the driving ring is driven to move along the axial direction of the input shaft, the transmission ring can be rotated, and the first elastic reset member can be energized, and the rotation of the transmission ring can drive the linkage structure to disconnect the transmission connection, that is, to disconnect the transmission connection between the input shaft and the output shaft sleeve.

[0018] In addition, the setting of the limiting structure can limit the axial movement of the driving ring along the input shaft during resetting, so as to effectively prevent the driving ring from being excessively reset or being offset due to other factors, thereby enhancing the reliability of the power transmission device. The limiting structure adopts the structure of a limiting snap ring, which is simple in structure, low in cost, easy to design and manufacture, and can accurately limit the driving ring during resetting of the driving ring.

[0019] Secondly, the mutual cooperation between the wedge-shaped protrusion on the driving ring and the transmission block on the transmission ring enables the transmission block to be pushed by the wedge-shaped protrusion when the driving ring moves axially along the input shaft, thereby driving the transmission ring to rotate, and at this time, the first elastic reset member stores energy. When the first elastic reset member releases energy, the elastic force of the elastic member drives the transmission ring to rotate and reset, and the transmission block pushes the wedge-shaped protrusion, so that the driving ring is reset synchronously. This structure design not only has the advantages of simple structure, easy design and implementation, but also has high movement reliability, can better ensure the rotation of the transmission ring by the axial movement of the driving ring, and can better ensure the axial movement reset of the driving ring by the reset rotation of the transmission ring.

[0020] The linkage structure includes a pawl and an elastic member arranged on one of the input shaft and the output shaft sleeve, and a ratchet groove arranged on the other of the input shaft and the output shaft sleeve. The pre-tightening force of the elastic member keeps the pawl and the ratchet in a clamped state, which can ensure the reliability of the transmission connection between the input shaft and the output shaft sleeve, and the pawl and the ratchet groove can transmit a large torque through clamping cooperation.

[0021] Furthermore, the through hole arranged on the transmission ring is beneficial for the pawl to pass through the through hole and keep clamping cooperation with the ratchet groove when the input shaft and the output shaft sleeve are in transmission connection, at this time, the pawl is not connected with the transmission ring. When the transmission ring rotates, the side wall forming the through hole pushes the pawl to move, so as to drive the pawl to be separated from the through hole and abut against the outer wall of the transmission ring, that is, the transmission ring is connected with the pawl, and the pawl is separated from the ratchet groove, at this time, the transmission connection between the input shaft and the output shaft sleeve is disconnected, and the elastic member stores energy. After the transmission ring is reset by the first elastic reset member, the pawl is driven by the released elastic member, passes through the through hole and clamps on the ratchet, that is, the pawl is reset to the clamping state with the ratchet.

[0022] At the same time, the pawl is arranged in a plurality of intervals along the circumference of the transmission ring, and the through hole is arranged in a plurality of one-to-one correspondence with each pawl, which can further improve the reliability of the transmission connection between the input shaft and the output shaft sleeve. The guide surface arranged on the transmission ring can provide smooth guidance for the pawl to separate from the through hole, reduce the friction and jamming between the pawl and the through hole, and make the separation and engagement of the linkage structure more stable and smooth, thereby improving the overall performance of the power transmission device.

[0023] In addition, the driving member is arranged in connection with the driving ring, the driving ring is driven to move along the axial direction of the input shaft through the driving member, so that the disconnection and connection operation is more convenient, thereby facilitating to improve the automatic control level of the power transmission device. The second elastic reset member connected with the driving ring is arranged, the second elastic reset member is released and drives the driving ring to reset when the driving of the driving ring is removed, so that the reliable reset of the driving ring is better guaranteed through the cooperation of the first elastic reset member, thereby the use effect of the power transmission device can be further improved.

[0024] Another purpose of the utility model lies in providing a vehicle, the vehicle is equipped with the power transmission device as described above.

[0025] The vehicle of the utility model adopts the power transmission device, the input shaft and the output shaft sleeve can be connected and separated, the development cost of the power part of the vehicle is reduced, and the use effect is good. DRAWINGS

[0026] The drawings that constitute a part of the utility model are used to provide further understanding of the utility model, the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model.

[0027] Figure 1 The power transmission device of the utility model embodiment is a sectional view;

[0028] Figure 2 The power transmission device of the utility model embodiment is a structure explosion map without assembling the shell;

[0029] Figure 3 The driving ring of the utility model embodiment is a structure schematic view in cooperation with the transmission ring;

[0030] Figure 4 The input shaft and the output shaft sleeve of the utility model embodiment are a structure view in cooperation;

[0031] Figure 5 The input shaft of the utility model embodiment is a structure schematic view;

[0032] Figure 6 The output shaft sleeve of the utility model embodiment is a structure schematic view of the first view;

[0033] Figure 7 The output shaft sleeve of the utility model embodiment is a structure schematic view of the second view;

[0034] Figure 8 The driving ring of the utility model embodiment is a structure schematic view;

[0035] Figure 9 A structure schematic view of a matching state of an input shaft and a pawl according to an embodiment of the present application is shown in the figure;

[0036] Figure 10 A structure schematic view of a matching state of an input shaft and a pawl according to an embodiment of the present application is shown in the figure; Figure 9 A view from the middle A direction;

[0037] Figure 11 A structure schematic view of a matching state of an input shaft and a pawl according to an embodiment of the present application is shown in the figure;

[0038] Explanation of reference signs:

[0039] 1, housing; 2, input shaft; 3, output shaft sleeve; 4, driving ring; 5, transmission ring; 6, first elastic reset member; 7, second elastic reset member; 8, electromagnetic coil; 9, limiting snap ring;

[0040] 201, ratchet groove; 202, first spline tooth; 203, first snap ring groove; 301, type groove; 302, second snap ring groove; 303, second spline groove; 304, limiting groove; 31, pawl; 32, elastic member; 401, wedge-shaped protrusion; 41, first ring body; 42, second ring body; 501, transmission block; 502, via hole; 5021, guide surface; 51, transmission plate; 52, third ring body;

[0041] 10, first snap ring; 20, second snap ring; 100, first bearing; 200, second bearing; 300, third bearing. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] Moreover, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connecting", "connecting", "connecting piece" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with specific circumstances.

[0045] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0046] Embodiment one

[0047] The embodiment relates to a power transmission device, which can realize the engagement and separation of an input shaft 2 and an output shaft sleeve 3, and helps to reduce the development cost of a vehicle power part.

[0048] In the prior art, when two-wheel drive mode is used in a four-wheel drive vehicle, energy is consumed when dragging a reducer or a non-working motor, so that power disconnection of the reducer or the non-working motor can realize lower whole vehicle drag torque, and the purpose of energy saving is achieved. In the prior design, the power of the reducer can be designed from the input end or the output end, however, the reducer with power disconnection and the reducer without power switching cannot be interchanged, if the reducer with power disconnection function is designed, it needs to be redeveloped, which increases the development cost of the vehicle power part.

[0049] Therefore, the embodiment aims at the deficiencies in the prior art, and proposes a new power transmission device, and as shown in Figure 1 and Figure 2 The power transmission device of the embodiment comprises an input shaft 2 and an output shaft sleeve 3 connected through a linkage structure, a driving ring 4 arranged on one of the input shaft 2 and the output shaft sleeve 3, and a transmission ring 5 and a first elastic reset member 6 arranged on the other of the input shaft 2 and the output shaft sleeve 3.

[0050] The transmission ring 5 is connected with the first elastic reset member 6, when the driving ring 4 is driven to move along the axial direction of the input shaft 2, the transmission ring 5 can be driven to rotate, and the first elastic reset member 6 can store energy. At the same time, when the transmission ring 5 is driven to rotate by the driving ring 4, the linkage structure can be enabled to disconnect the transmission connection between the input shaft 2 and the output shaft sleeve 3, and when the driving of the driving ring 4 is removed, the first elastic reset member 6 can release energy to drive the transmission ring 5 and the driving ring 4 to reset, and the linkage structure can be disabled.

[0051] At this time, as in the structure above, by means of the driving ring 4, the transmission ring 5 and the first elastic reset member 6 arranged, when the driving ring 4 is driven to move along the axial direction of the input shaft 2, the transmission ring 5 is driven to rotate, and the first elastic reset member 6 is energized, at the same time, the rotation of the transmission ring 5 can drive the linkage structure to disconnect the transmission connection, that is, disconnect the transmission connection between the input shaft 2 and the output shaft sleeve 3.

[0052] When the driving of the driving ring 4 is removed, the first elastic reset member 6 is de-energized, and drives the transmission ring 5 and the driving ring 4 to reset. At this time, the linkage structure is reset from the disengaged state to the engaged state, and the power is combined between the input shaft 2 and the output shaft sleeve 3. Such a structure design makes the power transmission device of the embodiment be able to realize the engagement and separation of the input shaft 2 and the output shaft sleeve 3, and the manufacturing cost is lower, which helps to reduce the development cost of the power part of the vehicle.

[0053] It should be noted that the rotation of the transmission ring 5 enables the linkage structure, that is, when the transmission ring 5 is driven to rotate by the driving ring 4, it can drive the linkage structure to enter the disengaged state, so as to disconnect the transmission connection between the input shaft 2 and the output shaft sleeve 3. When the first elastic reset member 6 is de-energized and drives the transmission ring 5 to reset, the above-mentioned removal of the linkage structure enables, that is, the reset transmission ring 5 removes the driving of the linkage structure, so that the linkage structure returns to the engaged state to enable the transmission connection between the input shaft 2 and the output shaft sleeve 3.

[0054] Based on the overall structure as above, in detail, as a preferred embodiment, continuing to refer to Figure 1 and Figure 2 The power transmission device of the embodiment comprises a housing 1, an input shaft 2 and an output shaft bearing rotatingly arranged in the housing 1, and the input shaft 2 and the output shaft sleeve 3 are connected in transmission through a linkage structure. The linkage structure has an engaged state and a non-engaged state. In the engaged state of the linkage structure, the transmission connection between the input shaft 2 and the output shaft sleeve 3, at this time, the power from the input shaft 2 can be transmitted to the output shaft sleeve 3; in the non-engaged state of the linkage structure, the transmission connection between the input shaft 2 and the output shaft sleeve 3 is disconnected, at this time, the input shaft 2 and the output shaft sleeve 3 can rotate relative to each other.

[0055] In particular, in order to facilitate the smooth rotation of the input shaft 2 and the output shaft sleeve 3 in the housing 1, in the embodiment, still referring to Figure 1 and Figure 2As shown, the first bearing 100 and the second bearing 200 are sleeved on the input shaft 2, the input shaft 2 is rotatably arranged in the housing 1 through the first bearing 100, and the input shaft 2 is rotatable relative to the output shaft sleeve 3 through the second bearing 200. Moreover, the third bearing 300 is also sleeved on the output shaft sleeve 3, and the output shaft sleeve 3 is rotatably arranged in the housing 1 through the third bearing 300. At this time, by using the first bearing 100, the second bearing 200 and the third bearing 300 arranged, not only the smooth rotation of the input shaft 2 and the output shaft sleeve 3 in the housing 1 is facilitated, but also the input shaft 2 and the output shaft sleeve 3 can be better supported.

[0056] In the embodiment, the second bearing 200 preferably adopts a needle bearing, which has the advantages of compact radial structure, high load bearing performance, high impact load resistance and is very suitable for high-speed rotation. In addition, in order to ensure the axial positioning of the first bearing 100 and the third bearing 300, a first snap ring groove 203 is arranged on the input shaft 2 corresponding to the first bearing 100, a first snap ring 10 is arranged in the first snap ring groove 203, and the first bearing 100 is axially limited by the first snap ring 10 and the shaft shoulder on the input shaft 2. Corresponding to the third bearing 300, a second snap ring groove 302 is also arranged on the output shaft sleeve 3, the two second snap ring grooves 302 are spaced apart, and a second snap ring 20 is arranged in each of the two second snap ring grooves 302, and the third bearing 300 is axially limited by the two second snap rings 20.

[0057] In the embodiment, the input shaft 2 is drivingly connected with the power device, and the output shaft sleeve 3 is drivingly connected with the half shaft. The power device can be a transmission in a vehicle or a driving motor. Taking the transmission as the power device, in specific implementation, for example, a first spline tooth 202 is arranged on the input shaft 2, and a second spline groove 303 is arranged on the inner wall of the output shaft sleeve 3, the input shaft 2 is fixedly connected with the first spline groove on the transmission through the first spline tooth 202, and the output shaft sleeve 3 is fixedly connected with the second spline tooth on the half shaft through the second spline groove 303, so that the power transmission device of the embodiment is drivingly connected with the transmission and the half shaft.

[0058] As a preferred embodiment, in the embodiment, the driving ring 4 is arranged on the output shaft sleeve 3, and the transmission ring 5 and the first elastic reset member 6 are arranged on the input shaft 2. It can be understood that, in addition to this structure, the driving ring 4 can also be arranged on the input shaft 2, and at this time, the transmission ring 5 and the first elastic reset member 6 are arranged on the output shaft sleeve 3.

[0059] Referring to Figure 3 and Figure 4 , in the embodiment, the input shaft 2 and the output shaft sleeve 3 are coaxially arranged, and the driving ring 4 is sleeved on the output shaft sleeve 3. Moreover, in the specific structure, as a preferred embodiment, in combination with Figure 6 andFigure 8 As shown, the driving ring 4 comprises a first ring body 41 and a second ring body 42 connected with each other, wherein the inner diameter of the first ring body 41 is larger than that of the second ring body 42, the first ring body 41 is sleeved on the large-diameter section of the output shaft sleeve 3, i.e. one end provided with the pawl 31, and the second ring body 42 is sleeved on the small-diameter section.

[0060] In this embodiment, when the driving ring 4 is driven, it can move along the axial direction of the input shaft 2, i.e. along the axial direction of the output shaft sleeve 3, and drive the transmission ring 5 to rotate, and at the same time, the first elastic return member 6 connected with the transmission member stores energy. When the driving ring 4 is removed, the return member releases energy and drives the transmission ring 5 and the driving ring 4 to reset.

[0061] In order to limit the movement stroke of the driving ring 4 in the axial direction of the input shaft 2 when resetting, the power transmission device of this embodiment further comprises a limiting structure, which is located on the input shaft 2 or the output shaft sleeve 3 provided with the driving ring 4, and is used for limiting the driving ring 4 when resetting. At this time, the setting of the limiting structure can effectively prevent the driving ring 4 from over-resetting or position deviation caused by other factors, thereby enhancing the reliability of the power transmission device in use.

[0062] In this embodiment, the limiting structure is specifically provided on the output shaft sleeve 3, and the limiting structure comprises a limiting snap ring 9 provided on the output shaft sleeve 3, which can be abutted by the driving ring 4 when resetting. In specific implementation, the limiting snap ring 9 is clamped in the snap ring groove on the output shaft sleeve 3. The limiting structure has the characteristics of simple structure, low cost and convenient design and manufacture by adopting the structure form of the limiting snap ring 9, and the limiting snap ring 9 can accurately limit the driving ring 4 when resetting.

[0063] As a preferred embodiment, in this embodiment, as shown in the figure, Figures 3 to 9 A wedge-shaped protrusion 401 is provided on the driving ring 4, and a transmission block 501 abutting against the wedge-shaped protrusion 401 is provided on the transmission ring 5. When the driving ring 4 moves along the axial direction of the input shaft 2, the transmission block 501 is pushed by the wedge-shaped protrusion 401, which can drive the transmission ring 5 to rotate, and when the transmission ring 5 is driven by the first elastic return member 6 which is released, the transmission block 501 can push the wedge-shaped protrusion 401 to reset the driving ring 4 synchronously.

[0064] In this embodiment, the transmission ring 5 is sleeved on the input shaft 2, and in the overall structure, as shown in the figure, Figure 9As shown, the transmission ring 5 comprises a transmission plate 51 and a third ring body 52 fixed on the transmission plate 51, and a through hole 502 for the input shaft 2 to pass through is formed on the transmission plate 51, and the through hole 502 is coaxially arranged with the inner cavity of the third ring body 52. In a specific implementation, the wedge-shaped protrusion 401 is specifically arranged on the first ring body 41 of the driving ring 4, and the transmission block 501 is specifically arranged on the transmission plate 51 of the transmission ring 5, and the wedge-shaped protrusion 401 and the transmission block 501 are connected by abutting. When the driving ring 4 moves along the axial direction of the output shaft sleeve 3, the driving ring 4 pushes the transmission block 501 through the wedge-shaped protrusion 401, and drives the transmission block 501 to rotate relative to the input shaft 2. When the first elastic reset member 6 is released, the transmission block 501 is reset, and the wedge-shaped protrusion 401 is pushed by the transmission block 501, so that the driving ring 4 is also reset synchronously.

[0065] In addition, in the embodiment, the third ring body 52 is inserted into one end of the output shaft sleeve 3 and can be connected or disconnected with the pawl 31 arranged on the output shaft sleeve 3 as mentioned below. And the ratchet groove 201 arranged on the input shaft 2 as mentioned below is located in the inner cavity of the third ring body 52.

[0066] In the embodiment, one end of the first elastic reset member 6 is connected to the input shaft 2, and the other end is connected to the transmission ring 5. When the transmission ring 5 is driven by the driving ring 4 to rotate relative to the input shaft 2, the first elastic reset member 6 is energized, and when the driving of the transmission ring 5 is removed, the first elastic reset member 6 is released, and the abutting cooperation of the wedge-shaped protrusion 401 and the transmission block 501 drives the transmission ring 5 and the driving ring 4 to reset synchronously.

[0067] On the basis of arranging the first elastic reset member 6, the power transmission device of the embodiment further comprises a second elastic reset member 7 connected with the driving ring 4. The second elastic reset member 7 is arranged between the driving ring 4 and the input shaft 2 sleeve, specifically, one end of the second elastic reset member 7 is connected with the driving ring 4, and the other end is connected with the input shaft 2 sleeve. When the driving ring 4 is driven to move along the axial direction, the second elastic reset member 7 is energized, and when the driving of the driving ring 4 is removed, the second elastic reset member 7 is released, and can drive the driving ring 4 to reset. At this time, the arrangement of the second elastic reset member 7 can ensure that the driving ring 4 is reliably reset, and the cooperation with the first elastic reset member 6 can better ensure that the driving ring 4 is reliably reset, thereby further improving the use effect of the power transmission device.

[0068] In the embodiment, the first elastic reset member 6 is preferably a torsion spring, and the second elastic reset member 7 is preferably a spring. The application is wide, the elastic force is good, and the use effect is good. In addition, it should be noted that, in the embodiment, in addition to the first elastic reset member 6 and the second elastic reset member 7 being arranged for resetting the transmission ring 5 and the driving ring 4, the first elastic reset member 6 can be arranged alone. In this case, in order to ensure the reliability of the driving ring 4, the elastic force of the first elastic member 32 needs to be set to be relatively large.

[0069] Referring to Figure 3 、 Figure 4 and Figure 7 , in the embodiment, the output shaft sleeve 3 is provided with a limiting groove 304 for limiting the rotation stroke of the transmission ring 5. Specifically, the transmission block 501 on the transmission ring 5 is located in the limiting groove 304. At this time, the limiting groove 304 can effectively ensure the rotation stroke of the transmission ring 5, thereby further improving the reliability of the linkage structure, and further better ensuring the power on-off between the input shaft 2 and the output shaft sleeve 3.

[0070] The linkage structure of the embodiment, as a preferred embodiment, comprises a pawl 31 and an elastic member 32 arranged on one of the input shaft 2 and the output shaft sleeve 3, and a ratchet groove 201 arranged on the other of the input shaft 2 and the output shaft sleeve 3. The pawl 31 is kept in a clamping state with the ratchet groove 201 under the elastic pre-tightening force of the elastic member 32. At this time, the pre-tightening force of the elastic member 32 keeps the pawl 31 in the clamping state with the ratchet, thereby ensuring the reliability of the transmission connection between the input shaft 2 and the output shaft sleeve 3, and the pawl 31 and the ratchet groove 201 can transmit a large torque.

[0071] Specifically, referring to Figure 4 、 Figure 6 and Figure 7 , one end of the input shaft 2 is provided with the ratchet groove 201, and the output shaft sleeve 3 is provided with the pawl 31 and the elastic member 32. One end of the output shaft sleeve 3 is formed with a type groove 301, and one end of the pawl 31 is rotatably arranged in the type groove 301. One end of the elastic member 32 is connected to the output shaft sleeve 3, and the other end is connected to the pawl 31. Under the pre-tightening force of the elastic member 32, the pawl 31 is kept in the extended position. When cooperating with the ratchet groove 201 on the input shaft 2, the pawl 31 can be kept in the clamping state with the ratchet groove 201.

[0072] When the pawl 31 is driven, the pawl 31 rotates in the groove 301 to the receiving position, at which time the pawl 31 is separated from the ratchet groove 201, i.e. the pawl 31 is disengaged from the ratchet groove 201, the transmission connection between the input shaft 2 and the output shaft is disconnected, and the elastic member 32 is energized. When the driving of the pawl 31 is removed, the pawl 31 is reset to the protruding position under the releasing force of the elastic member 32 and is engaged in the ratchet groove 201, so that the transmission connection between the input shaft 2 and the output shaft is established.

[0073] It is worth mentioning that, in addition to the ratchet groove 201 being provided on the input shaft 2 and the pawl 31 and the elastic member 32 being provided on the output shaft sleeve 3, it is also feasible to provide the ratchet groove 201 on the output shaft sleeve 3 and the pawl 31 and the elastic member 32 on the input shaft 2. In addition, it is also worth mentioning that the elastic member 32 is preferably a torsion spring in specific implementation.

[0074] In the embodiment, on the basis of the pawl 31 and the elastic member 32 and the ratchet groove 201 being provided, as a further preferred embodiment, as shown in Figures 9 to 11 , a through hole 502 is provided on the transmission ring 5 for the pawl 31 to pass through. When the linkage structure is enabled by the transmission ring 5, the transmission ring 5 can drive the pawl 31 to be disengaged from the through hole 502 and abut against the outer wall of the transmission ring 5. When the enabling of the linkage structure is removed by the transmission ring 5, the pawl 31 passes through the through hole 502 and is engaged in the ratchet.

[0075] As a more preferred embodiment, in the embodiment, the through hole 502 is specifically provided on the third ring body 52 of the transmission ring 5. When the pawl 31 passes through the through hole 502 and is engaged with the ratchet groove 201, the transmission ring 5 and the pawl 31 are in a disconnected state, and at this time the transmission connection between the input shaft 2 and the output shaft sleeve 3 is established. When the transmission ring 5 rotates, the side wall forming the through hole 502 pushes the pawl 31, so that the pawl 31 is disengaged from the through hole 502 and abuts against the outer wall of the transmission ring 5. At this time, the transmission ring 5 and the pawl 31 are in a connected state, and at this time the transmission connection between the input shaft 2 and the output shaft sleeve 3 is disconnected.

[0076] As a further preferred embodiment, in the embodiment, the pawl 31 is a plurality of pawls arranged at intervals along the circumference of the transmission ring 5, and the through hole 502 is a plurality of through holes corresponding to each pawl 31. At this time, the plurality of pawls 31 and the plurality of through holes 502 can further improve the reliability of the transmission connection between the input shaft 2 and the output shaft sleeve 3.

[0077] Specifically, as shown in Figure 7 , Figures 9 to 11As shown, the plurality of pawls 31 are rotationally arranged on the output shaft sleeve 3, and each pawl 31 is arranged with an elastic member 32 between the pawl 31 and the output shaft sleeve 3. The plurality of pawls 31 are arranged along the circumference of the output shaft sleeve 3, and the output shaft sleeve 3 is coaxially arranged with the transmission ring 5. That is, the plurality of pawls 31 are arranged along the circumference of the transmission ring 5. At this time, corresponding to the plurality of pawls 31, the third ring body 52 of the transmission ring 5 is also provided with a plurality of through holes 502, and each pawl 31 passes through each through hole 502 one by one.

[0078] At this time, when the transmission ring 5 is driven to rotate, the plurality of pawls 31 can be simultaneously driven to synchronously disengage from the through holes 502 and abut against the outer wall of the transmission ring 5, that is, the plurality of pawls 31 are driven to disengage from the ratchet grooves 201, so that the input shaft 2 and the output shaft sleeve 3 are disconnected in transmission, and the plurality of elastic members 32 are energized. When the driving of the transmission ring 5 is removed, the first elastic return member 6 which is energized is released, so that the transmission ring 5 is reset, and at the same time, the plurality of elastic members 32 are released, and the corresponding pawls 31 are reset to the clamping state of the ratchet grooves 201, so that the input shaft 2 and the output shaft sleeve 3 are in transmission connection.

[0079] In addition, as shown, Figure 11 In this embodiment, a guide surface 5021 for guiding the pawls 31 to disengage from the through holes 502 is arranged on the transmission ring 5. Specifically, the guide surface 5021 is arranged on the side wall of the through hole 502. In this way, the guide surface 5021 can provide smooth guidance for the pawls 31 to disengage from the through holes 502, and can reduce the friction and jamming between the pawls 31 and the through holes 502, so that the separation and engagement of the linkage structure is more stable and smooth, thereby improving the overall performance of the power transmission device.

[0080] In addition, the power transmission device of the embodiment further comprises a driving member connected with the driving ring 4 and used for driving the driving ring 4 to move along the axial direction of the input shaft 2. In this way, the disconnection and engagement operation between the input shaft 2 and the output shaft sleeve 3 is more convenient, thereby improving the automatic control level of the power transmission device.

[0081] In specific implementation, the driving member comprises an electromagnetic coil 8 arranged in the housing 1 and a magnetic body fixedly arranged on the driving ring 4. The magnetic body is for example a magnet, and the electromagnetic coil 8 is sleeved on the outer circumference of the driving ring 4. At this time, when the electromagnetic coil 8 is energized, the driving ring 4 can move along the axial direction.

[0082] It should be pointed out that, in addition to the above-mentioned electromagnetic driving form, the driving member of the embodiment can also adopt a motor or a hydraulic cylinder connected with the driving ring 4.

[0083] The power transmission device of the embodiment is in a transmission connection state between the input shaft 2 and the output shaft sleeve 3 in a normal state, that is, the pawl 31 and the ratchet groove 201 are kept in a clamping state. When it is needed to disconnect the transmission connection between the input shaft 2 and the output shaft sleeve 3, specifically, the electromagnetic coil 8 is energized to drive the driving ring 4 to move along the axial direction of the output shaft sleeve 3, the wedge-shaped protrusion 401 pushes the transmission block 501 to rotate, and drives the transmission ring 5 to rotate. At this time, the first elastic return member 6 and the second elastic return member 7 are both stored with energy, and the transmission ring 5 pushes the pawl 31 to move, so that the pawl 31 is separated from the through hole 502 of the transmission ring 5 and is abutted on the outer wall of the transmission ring 5. In this way, the pawl 31 and the ratchet groove 201 are in a disengaged state, and the transmission connection between the input shaft 2 and the output shaft sleeve 3 is disconnected.

[0084] When it is needed to connect the input shaft 2 and the output shaft sleeve 3 for transmission, the electromagnetic coil 8 is de-energized, that is, the driving of the driving ring 4 is removed, the first elastic return member 6 and the second elastic return member 7 release the stored energy, and simultaneously drive the transmission ring 5 and the driving ring 4 to reset, and the elastic member 32 drives the pawl 31 to reset. At this time, the pawl 31 and the ratchet groove 201 are in a clamping state, and the transmission connection between the input shaft 2 and the output shaft sleeve 3 is connected.

[0085] The power transmission device of the embodiment has a compact structure, can realize reliable engagement and separation of the input shaft 2 and the output shaft sleeve 3, is helpful to reduce the development cost of the power part of the vehicle, and can realize power on-off between the half shaft and the power device when applied between the half shaft and the power device, realize low vehicle drag torque, reduce energy loss, and through the structure of the matched input shaft spline tooth end, the power transmission device of the embodiment can also be matched with different reducers or different hybrid and electric vehicles, and has high universality and good use effect.

[0086] Embodiment two

[0087] The embodiment relates to a vehicle provided with the power transmission device of embodiment one.

[0088] The vehicle of the embodiment can realize engagement and separation of the input shaft 2 and the output shaft sleeve 3 through the power transmission device of embodiment one, is helpful to reduce the development cost of the power part of the vehicle, and can realize power on-off between the half shaft and the reducer when applied between the half shaft and the reducer, reduce the vehicle drag torque, reduce energy loss, and improve the use performance of the vehicle.

[0089] The above description is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A power transmission device characterized by comprising an input shaft (2) and an output shaft sleeve (3) connected through a linkage structure, a driving ring (4) provided on one of the input shaft (2) and the output shaft sleeve (3), and a transmission ring (5) and a first elastic return member (6) provided on the other of the input shaft (2) and the output shaft sleeve (3); the transmission ring (5) and the first elastic return member (6) are connected, and when the driving ring (4) is driven to move in the axial direction of the input shaft (2), the driving ring (4) can drive the transmission ring (5) to rotate and store energy in the first elastic return member (6); when the transmission ring (5) is driven to rotate by the driving ring (4), the linkage structure can be enabled to disconnect the transmission connection between the input shaft (2) and the output shaft sleeve (3), and when the driving of the driving ring (4) is removed, the first elastic return member (6) can release energy to drive the transmission ring (5) and the driving ring (4) to reset, and the enabling of the linkage structure is removed.

2. The power transmission device according to claim 1, characterized by further comprising a limiting structure; the limiting structure is located on the input shaft (2) or the output shaft sleeve (3) provided with the driving ring (4), and the limiting structure is used to limit the driving ring (4) when resetting.

3. The power transmission device according to claim 2, characterized in that the limiting structure comprises a limiting snap ring (9) provided on the input shaft (2) or the output shaft sleeve (3); and the driving ring (4) can be abutted on the limiting snap ring (9) when resetting.

4. The power transmission device according to claim 1, characterized in that a wedge-shaped protrusion (401) is provided on the driving ring (4), and a transmission block (501) abutting against the wedge-shaped protrusion is provided on the transmission ring (5); when the driving ring (4) moves in the axial direction of the input shaft (2), the transmission block (501) is pushed by the wedge-shaped protrusion (401) to drive the transmission ring (5) to rotate, and when the transmission ring (5) is driven by the first elastic return member (6) releasing energy, the transmission block (501) can push the wedge-shaped protrusion (401) to reset the driving ring (4) synchronously.

5. The power transmission device according to claim 1, characterized in that the linkage structure comprises a pawl (31) and an elastic member (32) provided on one of the input shaft (2) and the output shaft sleeve (3), and a ratchet groove (201) provided on the other of the input shaft (2) and the output shaft sleeve (3); the pawl (31) is kept in a clamped state with the ratchet groove (201) under the elastic pre-tightening force of the elastic member (32).

6. The power transmission device according to claim 5, characterized in that a through hole (502) is provided on the transmission ring (5) for the pawl (31) to pass through. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ When the linkage structure is enabled by the transmission ring (5), the transmission ring (5) can drive the pawl (31) to be out of the through hole (502) and abut against the outer wall of the transmission ring (5), and when the transmission ring (5) disables the linkage structure, the pawl (31) passes through the through hole (502) and is clamped on the ratchet wheel.

7. The power transmission device according to claim 6, characterized in that: The pawl (31) is a plurality of pawls arranged along the circumference of the transmission ring (5), and the through hole (502) is a plurality of through holes corresponding to each pawl (31).

8. The power transmission device according to claim 6, characterized in that: The transmission ring (5) is provided with a guide surface (5021) for guiding the pawl (31) to be out of the through hole (502).

9. The power transmission device according to any one of claims 1 to 8, characterized in that: Further comprising a driving member connected with the driving ring (4) and used for driving the driving ring (4) to move along the axial direction of the input shaft (2); and / or, Further comprising a second elastic reset member (7) connected with the driving ring (4), which can drive the driving ring (4) to reset when the driving of the driving ring (4) is removed.

10. A vehicle, characterized in that: The vehicle is provided with the power transmission device according to any one of claims 1 to 9.

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