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 a first joint piece arranged on the first shaft, a second joint piece arranged on the second shaft in a sliding mode, an elastic piece connected with the second joint piece and a driving assembly. The driving assembly comprises a guide piece, a driving ring and a transmission ring; a plurality of first clamping parts and a plurality of second clamping parts which are sequentially and alternately arranged in the circumferential direction of the second shaft are arranged on the guide piece; the driving ring is driven to push the transmission ring in the axial direction of the second shaft, the transmission ring is disengaged from the guide piece and rotates in the axial direction of the second shaft, the elastic piece firstly stores energy and then releases energy, so that the transmission ring is alternately clamped with the first clamping part and the second clamping part, and the second joint piece and the first joint piece are alternately connected and disconnected. According to the power transmission device, power connection and disconnection between the first shaft and the second shaft can be achieved, retention force does not need to be continuously provided in the process of power connection and power disconnection, and energy consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle transmission technical field, especially relates to a power transmission device. BACKGROUND

[0002] At present, when two-wheel drive mode is used in four-wheel drive vehicle, energy consumption exists due to dragging decelerator or non-working motor, so that power disconnection of decelerator or non-working motor can realize lower vehicle dragging torque and achieve the purpose of energy saving. The power transmission device is arranged between the output end of decelerator or non-working motor and half shaft to realize power on-off between the output end of decelerator or non-working motor and half shaft according to actual demand.

[0003] In the prior art, the power transmission device can be divided into clutch type and dog-tooth type according to the action element, and can be divided into electromagnetic type and motor driving type according to the execution element. Taking the power transmission device with electromagnetic type and related mechanism cooperating to realize the disconnection and connection between two shafts as an example, starting force and holding force are mostly needed in the disconnection and connection process of two shafts. Large current is needed for starting force, and small current is needed for a long time to provide holding force when maintaining a certain state of connection or disconnection, which can easily cause coil heating, power loss, and excessive dependence on power supply to provide stable voltage, and high requirement for power supply stability. SUMMARY

[0004] Therefore, the utility model aims at providing a power transmission device to reduce energy consumption in the power transmission process.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A power transmission device comprises a first connecting piece arranged on a first shaft, a second connecting piece arranged on a second shaft in a sliding mode, an elastic piece arranged between the second shaft and the second connecting piece, and a driving assembly connected with the second connecting piece.

[0007] The driving assembly comprises a guide piece arranged on a housing in the power transmission device, a driving ring arranged on the guide piece in a sliding mode, and a transmission ring connected with the driving ring in a transmission mode.

[0008] The guide piece is provided with a plurality of first clamping portions and a plurality of second clamping portions, and the plurality of first clamping portions and the plurality of second clamping portions are arranged alternately around the circumference of the second shaft.

[0009] The driving ring is driven to push the transmission ring along the axial direction of the second shaft, the transmission ring is disengaged from the guide and can rotate along the axial direction of the second shaft, the elastic member is capable of storing energy and releasing energy, and the transmission ring is capable of being alternatively engaged with the first engaging portion and the second engaging portion, and the second engaging member is alternatively engaged with and disconnected from the first engaging member.

[0010] Further, a rotation-stopping structure is arranged between the second engaging member and the second shaft, and the rotation-stopping structure is used to prevent the second engaging member from rotating around the second shaft; and / or a guiding structure is arranged between the driving ring and the guide, and the guiding structure is used to guide the driving ring to move along the axial direction of the second shaft.

[0011] Further, each of the first engaging portions comprises a first engaging groove extending along the axial direction of the second shaft, each of the second engaging portions comprises a second engaging groove extending along the axial direction of the second shaft, and the sizes of the first engaging groove and the second engaging groove in the extending direction are different; the driving ring is provided with first teeth, the transmission ring is provided with second teeth, a part of the second teeth is engaged with the first teeth, and another part of the second teeth is alternatively arranged in the first engaging groove and the second engaging groove.

[0012] Further, the driving assembly further comprises a linear driving unit arranged in the housing, the linear driving unit is connected with the driving ring, and is used to drive the driving ring to move along the axial direction of the second shaft.

[0013] Further, a first thrust bearing is arranged between the transmission ring and the second engaging member, and the transmission ring rotates relative to the second engaging member through the first thrust bearing.

[0014] Further, a first radial bearing is arranged between the transmission ring and the housing, and the transmission ring rotates relative to the housing through the first radial bearing.

[0015] Further, one of the first shaft and the second shaft is provided with a plug-in portion, the other of the first shaft and the second shaft is provided with a plug-in groove, and the plug-in portion is arranged in the plug-in groove; a second radial bearing is arranged in the plug-in groove, the second radial bearing is sleeved on the plug-in portion, and the first shaft and the second shaft rotate relative to each other through the second radial bearing; and / or a second thrust bearing is arranged between the first engaging member and the second shaft, and the first shaft rotates relative to the second shaft through the second thrust bearing.

[0016] Further, the first joint is provided with a first end surface tooth, and the second joint is provided with a second end surface tooth; the first end surface tooth is engaged with the second end surface tooth, so that the first joint and the second joint are engaged.

[0017] Further, the first joint is provided with an external tooth, and the second joint is provided with an internal tooth ring; the external tooth is engaged with the internal tooth ring, so that the first joint and the second joint are engaged.

[0018] Compared with the prior art, the power transmission device has the following advantages:

[0019] The power transmission device drives the driving ring to push the transmission ring along the axial direction of the second shaft, so that the transmission ring is disengaged from the clamping of the guide piece and can rotate around the axial direction of the second shaft, and the energy storage and release of the elastic piece are utilized to alternately clamp the transmission ring with the first clamping part and the second clamping part, so as to realize the alternating engagement and disengagement between the second joint and the first joint, thereby realizing the on-off of the power between the first shaft and the second shaft, and in the process of power engagement and disengagement between the first shaft and the second shaft, the driving source does not need to continuously provide a holding force, which is beneficial to reduce energy consumption and has good use effect.

[0020] In addition, the rotation stopping structure is arranged between the second joint and the second shaft, which can effectively prevent the second joint from rotating around the second shaft and ensure that the second joint only moves along the axial direction of the second shaft, so that in the engaged state of the first joint and the second joint, the power on the first shaft can be stably and reliably transmitted to the second shaft. The guide structure is arranged between the driving ring and the guide piece, which is beneficial to improve the stability of the driving ring sliding along the guide piece, reduce the risk of mechanical jamming, and prolong the service life of the driving assembly.

[0021] Secondly, each first clamping part and each second clamping part respectively adopts a first clamping groove and a second clamping groove extending along the axial direction of the second shaft, and the sizes of the first clamping groove and the second clamping groove in the extension direction are different, which is beneficial to the preparation and processing of the guide piece, and at the same time, the second tooth on the transmission ring is engaged with the first tooth on the driving ring, and the first clamping groove and the second clamping groove are alternately clamped, so that the transmission ring can be alternately clamped on the guide piece, realizing the stability of the transmission ring at the first position and the second position on the second shaft, thereby ensuring the stability of the second joint and the first joint in the engaged state and the disengaged state.

[0022] Further, the linear driving unit arranged in the housing is connected with the driving ring to drive the driving ring to move along the axial direction of the second shaft, so that the intermediate transmission mechanism such as a worm gear can be omitted, the power transmission device has less parts, and the structure is more compact. The first thrust bearing arranged between the transmission ring and the second engaging member can make the transmission ring rotate relative to the second engaging member, so that different rotating speeds between the transmission ring and the second engaging member are realized, and the second engaging member can be better limited in the axial direction of the second shaft by the cooperation of the elastic member and the first thrust bearing.

[0023] In addition, the first radial bearing arranged between the transmission ring and the housing can make the transmission ring freely rotate relative to the housing, so that the additional resistance caused by the constraint of the housing is avoided, and the rotating friction is reduced. The cooperation of the plug-in part and the plug-in slot of the first shaft and the second shaft and the second radial bearing arranged therebetween can realize the relative rotation between the first shaft and the second shaft, so that the use reliability of the power transmission device during the power connection and disconnection of the first shaft and the second shaft is ensured. The second thrust bearing arranged between the first engaging member and the second shaft can also realize the relative rotation between the first shaft and the second shaft, and can also axially limit the first engaging member and the second shaft to a certain extent.

[0024] In addition, the first engaging member and the second engaging member adopt the structure of end face tooth meshing, so that a larger contact area can be provided, the torque transmission capacity is improved, and the reliability and accuracy of transmission can be ensured by the high transmission precision of the end face tooth meshing.

[0025] Another purpose of the utility model lies in providing a vehicle, wherein the vehicle is provided with the power transmission device.

[0026] The vehicle of the utility model can realize the power connection and disconnection between the first shaft and the second shaft, and does not need to continuously provide a holding force during the power connection and disconnection between the first shaft and the second shaft, so that the energy consumption is reduced, and good use effect is achieved. DRAWINGS

[0027] The drawings constituting a part of the utility model are used to provide further understanding of the utility model, the illustrative embodiment of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0028] Figure 1A structure schematic view of the power transmission device according to an embodiment of the present application is shown in the figure.

[0029] Figure 2 A structure schematic view of the first engaging member according to an embodiment of the present application is shown in the figure.

[0030] Figure 3 A structure schematic view of the second engaging member according to an embodiment of the present application is shown in the figure.

[0031] Figure 4 An unfolded structure schematic view of the driving assembly according to an embodiment of the present application is shown in the figure.

[0032] Figure 5 An unfolded structure schematic view of the guiding member according to an embodiment of the present application is shown in the figure.

[0033] Figure 6 An unfolded structure schematic view of the driving ring according to an embodiment of the present application is shown in the figure.

[0034] Figure 7 An unfolded structure schematic view of the transmission ring according to an embodiment of the present application is shown in the figure.

[0035] Figure 8 A structure schematic view of the first thrust bearing according to an embodiment of the present application is shown in the figure.

[0036] Figure 9 A process diagram of the engaging and disengaging of the power transmission device according to an embodiment of the present application is shown in the figure.

[0037] Explanation of reference signs:

[0038] 1, first shaft; 2, second shaft; 3, guiding member; 4, driving ring; 5, transmission ring; 6, linear driving unit; 7, snap ring; 8, elastic member; 9, housing;

[0039] 11, first engaging member; 111, first end face tooth; 21, second engaging member; 211, second end face tooth; 31, first clamping groove; 32, second clamping groove; 41, first tooth; 51, second tooth.

[0040] 10, first thrust bearing; 20, first radial bearing; 30, second radial bearing; 40, second thrust bearing. DETAILED DESCRIPTION

[0041] 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.

[0042] In the description of the utility model, it needs to explain, if appearing "upper", "lower", "inner", "outer" and so on indicating orientation or positional relation term, it is based on the orientation or positional relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the device or element indicated must have a specific orientation, a specific orientation structure and operation, therefore cannot be understood as the limitation to the utility model. In addition, if appearing "first", "second" and so on term, it also only for the description purpose, and cannot be understood as indicating or implying relative importance.

[0043] In addition, in the description of the utility model, unless otherwise expressly limited, the terms "mounting", "connecting", "connection" and "connector" should be understood broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected, it can be mechanically connected, or electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or 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.

[0044] In the description of the utility model, it needs to explain, in the embodiment used in this embodiment, the orientation words such as "upper", "lower", "left", "right", "front", "back" are defined with the up-down direction, left-right direction and front-rear direction of the automobile as the reference. Among them, the up-down direction of the automobile is also the height direction of the automobile, the front-rear direction of the automobile is also the length direction of the automobile, and the left-right direction of the automobile is also the width direction of the automobile. "Inner", "outer" is defined with the contour of the corresponding component as the reference, for example, the interior and exterior of the vehicle are defined with the vehicle contour as the reference, the side close to the middle of the vehicle is "inner", and vice versa is "outer".

[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 reduce energy consumption without continuously providing holding force during the engagement and disengagement of the first shaft 1 and the second shaft 2.

[0048] Overall, referring to Figure 1 The power transmission device of the embodiment comprises a first engaging member 11 arranged on the first shaft 1, a second engaging member 21 slidingly arranged on the second shaft 2, an elastic member 8 arranged between the second shaft 2 and the second engaging member 21, and a driving assembly connected with the second engaging member 21.

[0049] The driving assembly comprises a guide element 3 arranged on the housing 9 of the power transmission device, a driving ring 4 slidingly arranged on the guide element 3, and a transmission ring 5 in transmission connection with the driving ring 4. The guide element 3 is provided with a plurality of first clamping portions and a plurality of second clamping portions, which are alternately arranged around the circumference of the second shaft 2.

[0050] The driving ring 4 is driven to push the transmission ring 5 along the axial direction of the second shaft 2, the transmission ring 5 is disengaged from the guide element 3 and can rotate around the axial direction of the second shaft 2, the elastic element 8 is first energized and then de-energized, so as to enable the transmission ring 5 to be alternately clamped with the first clamping portions and the second clamping portions, and the second engaging element 21 is alternately engaged and disconnected with the first engaging element 11.

[0051] At this time, as in the above arrangement, by cooperation of the guide element 3, the driving element and the transmission ring 5 in the driving assembly, when the driving ring 4 is driven to push the transmission ring 5 along the axial direction of the second shaft 2, the transmission ring 5 is disengaged from the guide element 3 and can rotate around the axial direction of the second shaft 2, and by energization and de-energization of the elastic element 8, the transmission ring 5 is alternately clamped with the first clamping portions and the second clamping portions, so as to enable the second engaging element 21 to be alternately engaged and disconnected with the first engaging element 11, thereby realizing the on-off of power between the first shaft 1 and the second shaft 2, and in the process of power engagement and power disconnection between the first shaft 1 and the second shaft 2, the driving source does not need to continuously provide a holding force, which is conducive to reducing energy consumption.

[0052] It should be noted that the above-mentioned first shaft 1 can be an input shaft or an output shaft, and similarly, the second shaft 2 can also be an input shaft or an output shaft, and when the first shaft 1 is an input shaft, the second shaft 2 is an output shaft; when the first shaft 1 is an output shaft, the second shaft 2 is an input shaft. The input shaft can be connected to the output end of a reducer or a motor, and the second shaft 2 can be connected to a half shaft, of course, it can be understood that the input shaft can also be directly a power output shaft of the reducer or the motor, and the second shaft 2 can also be directly a half shaft. The embodiment is specifically described by taking the first shaft 1 as an input shaft and the second shaft 2 as an output shaft as an example.

[0053] Based on the overall structure as above, in detail, continuing to refer to the embodiment shown in the Figure 1 The power transmission device comprises a first engaging element 11, a second engaging element 21, and an elastic element 8 and a driving assembly. The first engaging element 11 is fixedly connected to the first shaft 1, and has the same rotational speed as the first shaft 1, that is, the first engaging element 11 is fixedly connected to the input shaft and has the same rotational speed as the input shaft. Moreover, in specific implementation, the first engaging element 11 can be fixedly connected to the first shaft 1 by welding, screwing or key groove structure, etc.

[0054] The second engaging member 21 is slidingly arranged on the second shaft 2 and is movable between a first position and a second position on the second shaft 2. In the first position, the second engaging member 21 is kept in a separated state from the first engaging member 11, and the power between the first shaft 1 and the second shaft 2 is disconnected. In the second position, the second engaging member 21 is engaged with the first engaging member 11, and the power between the first shaft 1 and the second shaft 2 is connected, i.e. the power on the first shaft 1 can be transmitted to the second shaft 2 through the first engaging member 11 and the second engaging member 21.

[0055] In order to ensure that the second engaging member 21 moves only in the axial direction of the second shaft 2, in this embodiment, as a preferred embodiment, a rotation-stopping structure is arranged between the second engaging member 21 and the second shaft 2, which is used to prevent the second engaging member 21 from rotating around the second shaft 2. At this time, the arrangement of the rotation-stopping structure can effectively prevent the second engaging member 21 from rotating around the second shaft 2 and ensure that the second engaging member 21 moves only in the axial direction of the second shaft 2. Thus, in the engaged state of the first engaging member 11 and the second engaging member 21, the power on the first shaft 1 can be stably and reliably transmitted to the second shaft 2.

[0056] In specific implementation, the above-mentioned rotation-stopping structure, as a feasible embodiment, includes a spline groove arranged on one of the second shaft 2 and the second engaging member 21 and a spline tooth arranged on the other of the second shaft 2 and the second engaging member 21. The spline tooth is slidingly arranged in the spline groove, and the sliding of the spline tooth in the spline groove enables the second engaging member 21 to move only in the axial direction of the second shaft 2.

[0057] Of course, it can be understood that, in this embodiment, in addition to the above-mentioned structure, the rotation-stopping structure can also adopt the following structure, for example, a rotation-stopping protrusion can be arranged on one of the second shaft 2 and the second engaging member 21, and a rotation-stopping groove can be arranged on the other of the second shaft 2 and the second engaging member 21, the rotation-stopping groove extending in the axial direction of the second shaft 2, and the rotation-stopping protrusion is located in the rotation-stopping groove and can only move in the rotation-stopping groove. The cooperation of the rotation-stopping protrusion and the rotation-stopping groove enables the second engaging member 21 to move only in the axial direction of the second shaft 2, and such arrangement is also feasible.

[0058] In this embodiment, the elastic member 8 is arranged between the second shaft 2 and the second engaging member 21, and the second engaging member 21 can be well kept in the first position or the second position on the second shaft 2 under the action of the elastic member 8. In specific implementation, the elastic member 8 preferably adopts a disc spring, the disc spring is sleeved on the second shaft 2, one end of the disc spring is connected to the second shaft 2 through the clamping ring 7 clamped on the second shaft 2, and the other end of the disc spring abuts against the second engaging member 21. The disc spring has a high elastic coefficient and can quickly recover to the original state when compressed or stretched, thereby ensuring that the second engaging member 21 is stably fixed in the first position or the second position on the second shaft 2.

[0059] It is worth pointing out here that the elastic member 8 of the present embodiment can also use a common spring or the like to be able to exert a certain axial force on the second engaging member 21.

[0060] In the present embodiment, the elastic member 8 is arranged to exert a certain axial force on the second engaging member 21. Figure 1 In combination with the above, Figures 4 to 7 As shown in the figure, the drive assembly includes a guide member 3, a drive ring 4 and a transmission ring 5, wherein the guide member 3 is fixedly arranged on the housing 9 in the power device, and the guide member 3 is provided with a plurality of first clamping portions and a plurality of second clamping portions, which are arranged alternately around the circumference of the second shaft 2.

[0061] As a preferred embodiment, each first clamping portion includes a first clamping groove 31 extending along the axial direction of the second shaft 2, and each second clamping portion includes a second clamping groove 32 extending along the axial direction of the second shaft 2, and the sizes of the first clamping groove 31 and the second clamping groove 32 in the extension direction are different. At this time, the first clamping portion and the second clamping portion adopt the structural form of the first clamping groove 31 and the second clamping groove 32 respectively, which is beneficial to the machining and preparation of the guide member 3. And on the basis of the arrangement of the elastic member 8, the first clamping groove 31 and the second clamping groove 32 with different sizes are respectively clamped with the transmission ring 5, which can make the transmission ring 5 better keep in the first position or the second position.

[0062] In specific implementation, the size of the first clamping groove 31 in the extension direction is greater than the size of the second clamping groove 32 in the extension direction. When the second engaging member 21 is in the first position, the transmission ring 5 is clamped in the first clamping groove 31, and when the second engaging member 21 is in the second position, the transmission ring 5 is clamped in the second clamping groove 32.

[0063] It should be noted that the guide member 3 of the present embodiment can be a separate component and be fixed on the housing 9 by welding, screwing or key groove cooperation structure, or it can be integrally formed with the housing 9, which is not limited by the present embodiment.

[0064] In the present embodiment, the drive ring 4 and the transmission ring 5 are both sleeved on the second shaft 2, and the drive ring 4 is slidingly arranged on the guide member 3. Specifically, a guide structure is arranged between the drive ring 4 and the guide member 3, which is used to guide the drive ring 4 to move along the axial direction of the second shaft 2. At this time, the arrangement of the guide structure is beneficial to improve the stability of the drive ring 4 sliding along the guide member 3, reduce the risk of mechanical jamming, and prolong the service life of the drive assembly.

[0065] In some possible implementation manners, the guiding structure of the embodiment comprises a sliding groove arranged on one of the driving ring 4 and the guide 3, and a sliding block arranged on the other one of the driving ring 4 and the guide 3. The sliding groove extends along the axial direction of the second shaft 2, and the driving ring 4 can slide along the guide 3 well through the sliding of the sliding block in the sliding groove, that is, the driving ring 4 can slide along the axial direction of the second shaft 2 stably.

[0066] In the embodiment, the first tooth 41 is arranged on one end of the driving ring 4, and the second tooth 51 is arranged on the end face of the transmission ring 5 opposite to the driving ring 4. In the radial direction of the second shaft 2, a part of the second tooth 51 is engaged with the first tooth 41, and another part of the second tooth 51 is alternatively clamped in the first clamping groove 31 and the second clamping groove 32. In this way, the transmission ring 5 can be clamped on the guide 3 alternately through the engagement of the second tooth 51 arranged on the transmission ring 5 with the first tooth 41 on the driving ring 4 and the alternative clamping of the second tooth 51 with the first clamping groove 31 and the second clamping groove 32, so that the stability of the transmission ring 5 in the first position and the second position on the second shaft 2 is realized, thereby ensuring the stability of the second engaging member 21 and the first engaging member 11 in the engaged state and the disconnected state.

[0067] As a preferred embodiment, as shown in Figure 1 the embodiment, the driving assembly further comprises a linear driving unit 6 arranged in the housing 9, and the linear driving unit 6 is connected with the driving ring 4 and used for driving the driving ring 4 to move along the axial direction of the second shaft 2. In the embodiment, the linear driving unit 6 arranged in the housing 9 is taken as the driving source, and the linear driving unit 6 is connected with the driving ring 4 to drive the driving ring 4 to move along the axial direction of the second shaft 2, which can save the intermediate transmission mechanism such as a worm gear compared with taking a rotary driving unit as the driving source, so that the power transmission device has fewer parts and a more compact structure.

[0068] It is worth noting that the linear driving unit 6 of the embodiment can be a linear motor, a cylinder or an electromagnetic push rod, and the like. When the linear driving unit 6 takes an electromagnetic push rod as the driving source, the power transmission device of the embodiment only needs to push the driving ring 4 once to realize the switching of the engagement and disconnection of the first shaft 1 and the second shaft 2, and does not need to provide current continuously, so that the problem of coil heat generation caused by continuous power supply can be avoided, energy can be saved, and the problems of the change of the engaged state and the disconnected state caused by unstable power supply can be avoided.

[0069] In the embodiment, referring to Figure 1 and combining Figure 8As shown in the figure, the first thrust bearing 10 is arranged between the transmission ring 5 and the second engaging member 21, and the transmission ring 5 rotates relative to the second engaging member 21 through the first thrust bearing 10. At this time, through the first thrust bearing 10, on the one hand, the transmission ring 5 can rotate relative to the second engaging member 21, realizing the different rotation speed requirements between the transmission ring 5 and the second engaging member 21, and on the other hand, through the cooperation of the elastic member 8 and the first thrust bearing 10, the second engaging member 21 can also be better limited in the axial direction of the second shaft 2.

[0070] On the basis of the first thrust bearing 10, in the embodiment, the first radial bearing 20 is also arranged between the transmission ring 5 and the housing 9, and the transmission ring 5 rotates relative to the housing 9 through the first radial bearing 20. The arrangement of the first radial bearing 20 enables the transmission ring 5 to rotate freely relative to the housing 9, avoids the additional resistance caused by the constraint of the housing 9, and reduces the rotation friction.

[0071] In the embodiment, the first shaft 1 and the second shaft 2 are arranged to rotate in the housing 9, one of the first shaft 1 and the second shaft 2 is provided with a plug-in part, the other of the first shaft 1 and the second shaft 2 is provided with a plug-in slot, and the plug-in part is inserted in the plug-in slot. The second radial bearing 30 is arranged in the plug-in slot, the second radial bearing 30 is sleeved on the plug-in part, and the first shaft 1 and the second shaft 2 relatively rotate through the second radial bearing 30. At this time, the first shaft 1 and the second shaft 2 relatively rotate through the plug-in cooperation of the plug-in part and the plug-in slot and the arrangement of the second radial bearing 30, which can ensure the use reliability of the power transmission device during the power connection process and the power disconnection process of the first shaft 1 and the second shaft 2.

[0072] Specifically, in the embodiment, the plug-in part is arranged on the first shaft 1, that is, the end of the first shaft 1, and the plug-in slot is arranged at the shaft end of the second shaft 2. The end of the first shaft 1 is inserted in the plug-in slot, the inner ring of the second radial bearing 30 is sleeved on the end of the first shaft 1, and the outer ring of the second radial bearing 30 is embedded in the plug-in slot.

[0073] It can be understood here that the plug-in part can also be arranged on the second shaft 2, and at this time, the plug-in slot is correspondingly arranged on the first shaft 1, and such an arrangement is also possible.

[0074] In the embodiment, the second thrust bearing 40 is also arranged between the first joint 11 and the second shaft 2, and the first shaft 1 rotates relative to the second shaft 2 through the second thrust bearing 40. The second thrust bearing 40 can also realize the relative rotation between the first shaft 1 and the second shaft 2, and the cooperation of the second thrust bearing 40 and the second radial bearing 30 is more conducive to the relative rotation between the first shaft 1 and the second shaft 2, and the second thrust bearing 40 can also limit the first joint 11 and the second shaft 2 to a certain extent, thereby improving the use reliability of the power transmission device. The structure of the second thrust bearing 40 is the same as that of the first thrust bearing 10.

[0075] As one of the possible embodiments, in the embodiment, as shown in Figures 1 to 3 the first joint 11 and the second joint 21 adopt a disc-shaped structure, and the first end surface tooth 111 is arranged on the end surface of the first joint 11, and the second end surface tooth 211 is arranged on the end surface of the second joint 21 opposite to the first joint 11. The meshing of the first end surface tooth 111 and the second end surface tooth 211 can make the first joint 11 and the second joint 21 engage. In specific implementation, when the second joint 21 moves from the first position to the second position along the axial direction of the second shaft 2, the second end surface tooth 211 approaches the first end surface tooth 111 and is connected by meshing with the first end surface tooth 111. When the second joint 21 moves from the second position to the first position, the second end surface tooth 211 moves away from the first end surface tooth 111 and is separated from the first end surface tooth 111. The structure of the first joint 11 and the second joint 21 using end surface tooth meshing can provide a larger contact area, improve the torque transmission capacity, and use the characteristics of high transmission precision of end surface tooth meshing to ensure the reliability and accuracy of transmission.

[0076] As another possible embodiment, in the embodiment, the outer teeth are arranged on the outer circumferential surface of the first joint 11, and the inner tooth ring is arranged on the second joint 21 and is sleeved on the first joint 11. The meshing of the outer teeth and the inner tooth ring can make the first joint 11 and the second joint 21 engage. In specific implementation, when the second joint 21 moves from the first position to the second position along the axial direction of the second shaft 2, the inner tooth ring meshes with the outer teeth, and when the second joint 21 moves from the second position to the first position, the inner tooth ring slides relative to the outer teeth and is separated from the meshing with the outer teeth. By using the nested meshing of the outer teeth and the inner tooth ring of the first joint 11 and the second joint 21, the axial space occupation can be smaller, which is conducive to the compact design of the axial structure of the power transmission device.

[0077] In specific use of the power transmission device of the embodiment, referring to Figure 9As shown in the figure, the second engaging member 21 is located at the first position on the second shaft 2, that is, the second engaging member 21 is disconnected with the first engaging member 11, the second tooth 51 on the transmission ring 5 is kept in the clamping state in the first clamping groove 31 on the guide member 3 under the action of the elastic member 8, and the power is disconnected between the first shaft 1 and the second shaft 2.

[0078] When the power needs to be connected between the first shaft 1 and the second shaft 2, the linear driving device drives the transmission ring 5 to move leftward along the axial direction of the second shaft 2, the first tooth 41 on the driving ring 4 pushes the second tooth 51 to move along the axial direction of the second shaft 2, so that the second tooth 51 on the transmission ring 5 is separated from the first clamping groove 31 and rotates around the second shaft 2, the second engaging member 21 moves from the first position to the second position, and the elastic member 8 stores energy. When the driving of the driving ring 4 is removed, the driving ring 4 moves rightward along the axial direction of the second shaft 2 and returns to the original position, the elastic member 8 releases energy, the elastic force is applied to the second engaging member 21, the second engaging member 21 pushes the transmission ring 5, so that the second tooth 51 on the transmission ring 5 is clamped into the adjacent second clamping groove 32. At this time, the second engaging member 21 remains in the second position, that is, the second engaging member 21 is connected with the first engaging member 11, and the power is connected between the first shaft 1 and the second shaft 2.

[0079] When the power needs to be disconnected between the first shaft 1 and the second shaft 2, the linear driving device drives the transmission ring 5 to move leftward along the axial direction of the second shaft 2, the first tooth 41 on the driving ring 4 pushes the second tooth 51 to move along the axial direction of the second shaft 2, so that the second tooth 51 on the transmission ring 5 is separated from the second clamping groove 32 and rotates around the second shaft 2, the second engaging member 21 moves from the second position to the first position, and the elastic member 8 stores energy. When the driving of the driving ring 4 is removed, the driving ring 4 moves rightward along the axial direction of the second shaft 2 and returns to the original position, the elastic member 8 releases energy, the elastic force is applied to the second engaging member 21, the second engaging member 21 pushes the transmission ring 5, so that the second tooth 51 on the transmission ring 5 is clamped into the next first clamping groove 31. At this time, the second engaging member 21 remains in the first position, that is, the second engaging member 21 is disconnected with the first engaging member 11, and the power is disconnected between the first shaft 1 and the second shaft 2.

[0080] The power transmission device of the embodiment can realize the connection and disconnection of the power between the input shaft and the output shaft, and in the process of the power connection and disconnection between the input shaft and the output shaft, the driving source does not need to continuously provide the holding force, which is conducive to reducing the energy consumption and has good use effect.

[0081] Embodiment Two

[0082] The embodiment relates to a vehicle provided with the power transmission device of the embodiment one.

[0083] The vehicle of the embodiment can realize the on-off of power between the first shaft 1 and the second shaft 2 by adopting the power transmission device of the first embodiment, and during the process of power engagement or power disconnection between the first shaft 1 and the second shaft 2, the holding force does not need to be continuously provided, which is beneficial to reduce energy consumption and improve the use performance of the vehicle.

[0084] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power transmission device, comprising: a first engaging member (11) arranged on a first shaft (1), a second engaging member (21) arranged on a second shaft (2) in a sliding manner, an elastic member (8) arranged between the second shaft (2) and the second engaging member (21), and a driving assembly connected with the second engaging member (21) ; the driving assembly comprises a guide member (3) arranged on a housing (9) in the power transmission device, a driving ring (4) arranged on the guide member (3) in a sliding manner, and a transmission ring (5) connected with the driving ring (4) in a transmission manner; the guide member (3) is provided with a plurality of first clamping portions and a plurality of second clamping portions, and the plurality of first clamping portions and the plurality of second clamping portions are arranged alternately around the circumference of the second shaft (2) ; the driving ring (4) is driven to push the transmission ring (5) in the axial direction of the second shaft (2), the transmission ring (5) is disengaged from the guide member (3) and can rotate in the axial direction of the second shaft (2), the elastic member (8) can make the transmission ring (5) be clamped with the first clamping portions and the second clamping portions alternately after storing energy and releasing energy, and the second engaging member (21) is alternately engaged and disconnected with the first engaging member (11). 2.The power transmission device according to claim 1, wherein: a rotation-stopping structure is arranged between the second engaging member (21) and the second shaft (2), and the rotation-stopping structure is used to prevent the second engaging member (21) from rotating around the second shaft (2) ; and / or a guide structure is arranged between the driving ring (4) and the guide member (3), and the guide structure is used to guide the driving ring (4) to move in the axial direction of the second shaft (2). 3.The power transmission device according to claim 1, wherein: each of the first clamping portions comprises a first clamping groove (31) extending in the axial direction of the second shaft (2), each of the second clamping portions comprises a second clamping groove (32) extending in the axial direction of the second shaft (2), and the first clamping groove (31) and the second clamping groove (32) are different in size in the extending direction; the driving ring (4) is provided with first teeth (41), the transmission ring (5) is provided with second teeth (51), a part of the second teeth (51) is engaged with the first teeth (41), and another part of the second teeth (51) is alternately clamped in the first clamping groove (31) and the second clamping groove (32). 4.The power transmission device according to claim 1, wherein: the driving assembly further comprises a linear driving unit (6) arranged in the housing (9), the linear driving unit (6) is connected with the driving ring (4), and is used to drive the driving ring (4) to move in the axial direction of the second shaft (2). 5.The power transmission device according to claim 1, wherein: ​ ​ ​ ​ ​ ​ ​ ​ ​ A first thrust bearing (10) is arranged between the transmission ring (5) and the second engaging member (21), and the transmission ring (5) rotates relative to the second engaging member (21) through the first thrust bearing (10).

6. The power transmission device according to claim 5, characterized in that: A first radial bearing (20) is arranged between the transmission ring (5) and the housing (9), and the transmission ring (5) rotates relative to the housing (9) through the first radial bearing (20).

7. The power transmission device according to claim 1, characterized in that: One of the first shaft (1) and the second shaft (2) is provided with a plug-in part, and the other of the first shaft (1) and the second shaft (2) is provided with a plug-in slot, and the plug-in part is inserted in the plug-in slot; A second radial bearing (30) is arranged in the plug-in slot, the second radial bearing (30) is sleeved on the plug-in part, and the first shaft (1) and the second shaft (2) rotate relative to each other through the second radial bearing (30); and / or, a second thrust bearing (40) is arranged between the first engaging member (11) and the second shaft (2), and the first shaft (1) rotates relative to the second shaft (2) through the second thrust bearing (40).

8. The power transmission device according to any one of claims 1 to 7, characterized in that: A first end face tooth (111) is arranged on the first engaging member (11), and a second end face tooth (211) is arranged on the second engaging member (21); The engagement of the first end face tooth (111) and the second end face tooth (211) can engage the first engaging member (11) and the second engaging member (21).

9. The power transmission device according to any one of claims 1 to 7, characterized in that: An external tooth is arranged on the first engaging member (11), and an internal tooth ring is arranged on the second engaging member (21); The engagement of the external tooth and the internal tooth ring can engage the first engaging member (11) and the second engaging member (21).

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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