Connecting mechanism of wheel and driving unit, driving device and vehicle

Abstract

The embodiment of the invention provides a connecting mechanism for a wheel and a driving unit, a driving device and a vehicle. The connecting mechanism comprises a first connecting assembly used for being connected with the wheel and a second connecting assembly used for being connected with the driving unit. The connecting mechanism has a first working state and a second working state, in the first working state, the first connecting assembly is connected with the second connecting assembly, and the second connecting assembly transmits the driving force of the driving unit to the wheels through the first connecting assembly; and in the second working state, the first connecting assembly and the second connecting assembly are disconnected. Loss of driving energy can be reduced, and the endurance mileage of the vehicle is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a connecting mechanism between a wheel and a driving unit, a driving device and a vehicle. Background Art

[0002] At present, new energy four-wheel drive vehicles can choose front-wheel drive, rear-wheel drive or all-wheel drive when running. At high speeds, the vehicle can choose the front-wheel drive mode, and the motor in the rear-wheel drive stops working. However, the rear wheels drive the rear-wheel drive assembly to move together, thereby consuming part of the front-wheel drive's driving energy, causing a loss of driving energy and reducing the vehicle's cruising range. Summary of the invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a connection mechanism between a wheel and a drive unit, a drive device, and a vehicle that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, an embodiment of the present invention discloses a connection mechanism between a wheel and a drive unit, comprising: a first connection component for connecting to the wheel and a second connection component for connecting to the drive unit; wherein:

[0005] The connecting mechanism has a first working state and a second working state. In the first working state, the first connecting component and the second connecting component are connected, and the second connecting component transmits the driving force of the driving unit to the wheel through the first connecting component; in the second working state, the first connecting component and the second connecting component are disconnected.

[0006] Optionally, the first connecting assembly includes a first housing, an elastic member and a connecting rod, and the second connecting assembly includes a rotating member;

[0007] One end of the elastic member is connected to the first housing, and the other end of the elastic member is connected to the connecting rod; one end of the connecting rod is movably connected to the first housing;

[0008] In the first working state, the other end of the connecting rod is connected to the rotating member; in the second working state, the other end of the connecting rod compresses the elastic member and is separated from the rotating member.

[0009] Optionally, a plurality of limiting grooves are arranged in the circumference of the rotating member;

[0010] The connecting rod is arranged corresponding to the limiting groove;

[0011] In the first working state, the connecting rod is limited in one of the limiting grooves.

[0012] Optionally, the limiting groove includes a first side wall and a second side wall opposite to each other along the circumference of the rotating member, the rotating member intersects with the first side wall in a radial direction through the first side wall, and the rotating member intersects with the second side wall in a radial direction through the second side wall.

[0013] Optionally, the connecting rod is rotatably connected to the first shell.

[0014] Optionally, the connecting rod and the first housing are connected via a first bearing.

[0015] Optionally, the connecting rod is arranged between the inner periphery of the first shell and the outer periphery of the rotating member; the elastic member is arranged between the inner periphery of the first shell and the connecting rod;

[0016] The connecting rod extends along a first direction, the elastic member extends along a second direction, and an angle between the second direction and the first direction is an acute angle.

[0017] Optionally, the elastic member is an arc spring.

[0018] Optionally, the connecting rod includes an opposite first end, a second end, and a connecting portion disposed between the first end and the second end;

[0019] The connecting portion is disposed close to the first end portion, and the connecting portion is rotatably connected to the first shell;

[0020] In the first working state, the second end portion is connected to the rotating member; in the second working state, the second end portion compresses the elastic member and is separated from the rotating member.

[0021] Optionally, a limiting member is provided on the first shell, and the limiting member is enclosed to form an arc-shaped groove;

[0022] The first end portion is arranged corresponding to the arc-shaped groove, the first end portion is embedded in the arc-shaped groove, and the first end portion is movably connected to the limiting member.

[0023] Optionally, the first connecting assembly further comprises a first shaft rod for connecting to the wheel;

[0024] The first shaft is connected to the first housing.

[0025] Optionally, the second connecting assembly further includes a second housing;

[0026] The first shell and the second shell are connected and enclosed to form a sealed cavity;

[0027] The elastic member, the connecting rod and the rotating member are all arranged in the sealing cavity.

[0028] Optionally, the sealing cavity is filled with lubricant.

[0029] Optionally, the second connecting assembly further comprises a second shaft for connecting to the driving unit;

[0030] The second shaft is connected to the second shell and the rotating member respectively.

[0031] Optionally, the second shaft and the second housing are connected via a second bearing.

[0032] Optionally, a sealing ring is provided between the second shaft and the second housing.

[0033] Optionally, the connecting rod and the rotating member both rotate around the axis of the rotating member.

[0034] In a second aspect, an embodiment of the present invention discloses a driving device, including a connecting mechanism between the above-mentioned wheel and a driving unit.

[0035] In a third aspect, an embodiment of the present invention discloses a vehicle, comprising the connection mechanism between the wheel and the drive unit or the drive device.

[0036] The embodiments of the present invention include the following advantages:

[0037] In an embodiment of the present invention, when the connecting mechanism is in the second working state, the first connecting component and the second connecting component are disconnected. Since the first connecting component is connected to the wheel and the second connecting component is connected to the driving unit, when the driving unit stops driving, there is no need to drive the second connecting component to move during the rotation of the wheel, which can reduce the loss of driving energy and increase the vehicle's cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the internal structure of a connecting mechanism of the present invention;

[0039] Figure 2 It is a cross-sectional view of a connection structure of the present invention.

[0040] Description of reference numerals:

[0041] 1-first connecting assembly, 11-first shell, 111-first flange, 112-threaded hole, 12-elastic member, 13-connecting rod, 14-limiting member, 141-arc groove, 15-first shaft rod, 2-second connecting assembly, 21-rotating member, 211-limiting groove, 2111-first side wall, 2112-second side wall, 22-second shell, 221-second flange, 23-second shaft rod, 3-sealing ring, 4-first bearing, 5-second bearing, 6-fastener, 7-sealing chamber. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] One of the core concepts of an embodiment of the present invention is to disclose a connecting mechanism between a wheel and a drive unit, comprising: a first connecting component 1 for connecting to the wheel and a second connecting component 2 for connecting to the drive unit; wherein the connecting mechanism has a first working state and a second working state, in the first working state, the first connecting component and the second connecting component are connected, and the second connecting component transmits the driving force of the drive unit to the wheel through the first connecting component; in the second working state, the first connecting component and the second connecting component are disconnected.

[0047] In an embodiment of the present invention, when the connecting mechanism is in the second working state, the first connecting component and the second connecting component are disconnected. Since the first connecting component is connected to the wheel and the second connecting component is connected to the driving unit, when the driving unit stops driving, there is no need to drive the second connecting component to move during the rotation of the wheel, which can reduce the loss of driving energy and increase the vehicle's cruising range.

[0048] Specifically, the connecting mechanism is in the first working state, and the first connecting component is connected to the second connecting component. In this way, when the driving unit provides driving force, the second connecting component can drive the first connecting component to move, and the first connecting component can drive the wheel to rotate, thereby realizing driving the wheel to travel.

[0049] Specifically, the present invention is only applied to a new energy four-wheel drive vehicle as an example for explanation, and other situations can refer to the settings. The new energy four-wheel drive vehicle includes independently set front and rear drives. Specifically, the first connecting component 1 is connected to the wheel so that the first connecting component 1 can drive the wheel to move; the wheel can be the front wheel or the rear wheel of the vehicle. The second connecting component 2 is connected to the drive unit so that the drive unit can drive the second connecting component 2 to move. The drive unit may include components such as a drive motor and a differential; the differential can be connected to the drive motor and the second connecting component 2 respectively.

[0050] Specifically, the wheels and drive units described in the embodiments of the present invention are correspondingly arranged. When the wheels are front wheels, the corresponding drive units may include front-drive motors; when the wheels are rear wheels, the corresponding drive units may include rear-drive motors. Further, when the drive unit includes a front-drive motor, the drive energy comes from the rear-drive motor; when the drive unit includes a rear-drive motor, the drive energy comes from the front-drive motor. For example, when the front-drive motor stops driving, the rear-drive motor drives the rear wheels to rotate, and the front wheels and the front-drive motor are disconnected; or, when the rear-drive motor stops driving, the front-drive motor drives the rear wheels to rotate, and the rear wheels and the rear-drive motor are disconnected.

[0051] Optionally, the first connecting component 1 includes a first shell 11, an elastic member 12 and a connecting rod 13, and the second connecting component 2 includes a rotating member 21; one end of the elastic member 12 is connected to the first shell 11, the other end of the elastic member 12 is connected to the connecting rod 13, and one end of the connecting rod 13 is movably connected to the first shell 11; in the first working state, the other end of the connecting rod 13 is connected to the rotating member 21; in the second working state, the other end of the connecting rod 13 compresses the elastic member 12 and separates from the rotating member 21.

[0052] In the embodiment of the present invention, one end of the elastic member 12 is connected to the first housing 11, and the other end is connected to the connecting rod 13, so that the elastic member 12 can apply elastic force to the connecting rod 13. When the connecting mechanism is in the second working state, one end of the elastic member 12 is movably connected to the first housing 11, and the other end of the connecting rod 13 compresses the elastic member 12 to achieve the separation between the connecting rod 13 and the rotating member 21, and then the first connecting assembly 1 and the second connecting assembly 2 can be driven to separate. In this way, when the driving unit stops driving, the second connecting assembly 2 does not need to be driven to move during the rotation of the wheel, which can reduce the loss of driving energy and increase the cruising range of the vehicle.

[0053] Specifically, the first connecting assembly 1 may include a first housing 11, an elastic member 12 and a connecting rod 13, and the two ends of the elastic member 12 are respectively connected to the first housing 11 and the connecting rod 13. Since the elastic member 12 can be telescopically deformed, it is convenient to realize that the connecting rod 13 can move relative to the first housing 11. The elastic member 12 can be a tension spring or a compression spring. Specifically, the elastic member 12 can always be in a compressed state.

[0054] Specifically, the elastic member 12 can apply elastic force to the connecting rod 13. When the external force applied to the connecting rod 13 is greater than the elastic force, the connecting rod 13 can compress the spring; when the external force applied to the connecting rod 13 is less than the elastic force, the elastic member 12 can drive the connecting rod 13 to rebound.

[0055] Specifically, the first shell 11 may have a receiving cavity, and the elastic member 12 , the connecting rod 13 and the rotating member 21 may all be disposed in the receiving cavity. The first shell 11 may protect the elastic member 12 , the connecting rod 13 and the rotating member 21 .

[0056] Furthermore, the second connecting component 2 includes a rotating member 21, and the two ends of the connecting rod 13 can be respectively arranged corresponding to the first shell body 11 and the rotating member 21. Since one end of the connecting rod 13 is movably connected to the first shell body 11, the elastic member 12 and the rotating member 21 can be respectively arranged on both sides of the connecting rod 13. In this way, when the connecting rod 13 compresses the elastic member 12, the connecting rod 13 can be separated from the rotating member away from the rotating member 21; when the elastic member 12 drives the connecting rod 13 to rebound, the connecting rod 13 can be close to the rotating member 21 and engage with the rotating member 21, that is, in the process of the elastic member 12 undergoing telescopic deformation, the connecting rod 13 can be connected or disconnected from the rotating member 21.

[0057] Specifically, the connecting rod 13 may be rotatably connected to the first housing 11 , or the connecting rod 13 may be slidably connected to the first housing 11 , which may be specifically configured according to actual needs.

[0058] Specifically, the connecting rods 13 and the elastic members 12 may be arranged in a one-to-one correspondence, the number of the connecting rods 13 may be set according to actual needs, and a plurality of connecting rods 13 may be arranged at intervals in the circumferential direction around the rotating member 21 .

[0059] Specifically, when the connecting mechanism is in the second working state, the connecting rod 13 and the rotating member 21 are separated, so that the first connecting component 1 and the second connecting component 2 are separated. In this way, when the driving unit stops running, the wheel does not need to drive the second connecting component 2 to move together, which can reduce the loss of driving energy and improve the vehicle's cruising range; when the connecting mechanism is in the first working state, the connecting rod 13 and the rotating member 21 are connected, so that the first connecting component 1 and the second connecting component 2 are connected. In this way, the driving unit can drive the second connecting component 2 to move, the second connecting component 2 can drive the first connecting component 1 to move, and the first connecting component 1 can drive the wheel to move, so that the driving unit can drive the wheel to move.

[0060] Taking the example that the vehicle is driven by the front-drive motor at high speed and is driven by both the front-drive motor and the rear-drive motor at low speed, the corresponding wheels in the embodiment of the present invention are rear wheels.

[0061] Specifically, when the vehicle speed reaches a preset speed, the front drive motor provides driving force, the rear drive motor is disconnected, and the rear wheel can drive the first connection component 1 to move, so that the rotation speed of the connecting rod 13 can be greater than the rotation speed of the rotating member 21, the centrifugal force on the connecting rod 13 is greater than the elastic force, and the connecting rod 13 is separated from the rotating member 21, so that the first connection component 1 and the second connection component 2 are separated, and the connection mechanism can be switched to the second working state, which can prevent the rear wheel from driving the second connection component 2 to move, and can reduce the driving energy loss of the front drive motor. That is, when the vehicle speed is high, the drive unit is disconnected, and the connecting rod 13 and the rotating member 21 can be automatically disconnected.

[0062] When the vehicle speed is lower than the preset speed, the centrifugal force of the connecting rod 13 is smaller than the elastic force, and the elastic member 12 can drive the connecting rod 13 to engage with the rotating member 21, and the connecting mechanism can be switched to the first working state, the rear drive motor is turned on, and the second connecting assembly 2 can be driven to move, and the second connecting assembly 2 can drive the rear wheels to rotate through the first connecting assembly 1. That is, when the vehicle speed is low, the connecting rod 13 and the rotating member 21 can be automatically connected again, the driving unit is started, and the wheels can be driven to rotate again.

[0063] Specifically, when reversing, the wheels can drive the drive motor to reverse.

[0064] Optionally, both the connecting rod 13 and the rotating member 21 can rotate around the axis of the rotating member 21. In this way, when the rotation speed of the connecting rod 13 is greater than that of the rotating member 21, the centrifugal force exerted on the connecting rod 13 can be greater than the elastic force, so that the connecting rod 13 can compress the elastic member 12 and achieve automatic separation from the rotating member 21; when the rotation speed of the connecting rod 13 is relatively low, the elastic force exerted on the connecting rod 13 is greater than the centrifugal force, so that the elastic member 12 can drive the connecting rod 13 to connect with the rotating member 21, thereby improving the reliability of the detachable connection between the connecting rod 13 and the rotating member 21.

[0065] Specifically, after the vehicle speed reaches the preset speed, the drive unit stops working, and the driving force of the second connecting component 2 disappears, so that the rotation speed of the rotating member 21 is low, and the wheel can drive the first connecting component 1 to move, so that the rotation speed of the connecting rod 13 is high. The rotation speed of the connecting rod 13 is greater than the rotation speed of the rotating member 21. Under the action of centrifugal force, the connecting rod 13 can compress the elastic member 12 to achieve separation from the rotating member 21, so that the connecting mechanism switches to the second working state.

[0066] Specifically, after the vehicle speed is less than the preset speed, the centrifugal force is less than the tension of the elastic member 12, so that the connecting rod 13 can re-engage with the rotating member 21, thereby realizing the connection between the first connecting component 1 and the second connecting component 2. In this way, turning on the driving unit can drive the wheels to rotate, so that the connecting mechanism switches to the first working state.

[0067] Optionally, a plurality of limiting grooves 211 are arranged in the circumference of the rotating member 21 ; the connecting rod 13 can be arranged corresponding to the limiting grooves 211 ; in the first working state, the connecting rod 13 can be limited in one of the limiting grooves 211 .

[0068] In the embodiment of the present invention, the connecting rod 13 can be limitedly matched with any one of the limiting grooves 211 on the rotating member 21, so that the connecting rod 13 can be connected to the rotating member 21 at any time, which can improve the reliability and safety of vehicle operation. Moreover, the limiting match between the connecting rod 13 and the limiting groove 211 can also improve the reliability of the engagement between the connecting rod 13 and the rotating member 21, thereby improving the reliability of the driving unit driving the wheel to operate.

[0069] Optionally, the limiting groove 211 includes a first side wall 2111 and a second side wall 2112 relative to each other along the circumference of the rotating member 21, and the rotating member 21 intersects with the first side wall 2111 in the radial direction of the first side wall 2111, and the rotating member 21 intersects with the second side wall 2112 in the radial direction, so that the first side wall 2111 and the second side wall 2112 can guide the connecting rod 13 to facilitate the connecting rod 13 to slide out or slide into the limiting groove 211.

[0070] Specifically, the plane where the first side wall 2111 is located is the first plane, the straight line where the diameter of the rotating part 21 passing through the first side wall 2111 is located is the first straight line, and the first straight line intersects with the first plane; the plane where the second side wall 2112 is located is the second plane, the straight line where the diameter of the rotating part 21 passing through the second side wall 2112 is located is the second straight line, and the second straight line intersects with the second plane.

[0071] Optionally, the cross-sectional shape of the limiting groove 211 perpendicular to the axial direction of the rotating member 21 may include: a trapezoidal shape, an arc shape, so that the side wall of the limiting groove 211 can be inclined radially relative to the rotating member 21, and the side wall of the limiting groove 211 can guide the connecting rod 13 to facilitate the connecting rod 13 to slide out or slide into the limiting groove 211.

[0072] Optionally, the rotating member 21 may be a roller structure with a plurality of limiting grooves 211 arranged on the outer circumference, or the rotating member 21 may be a ratchet, and the gap between two adjacent teeth on the ratchet forms the limiting groove 211 .

[0073] Specifically, the limiting groove 211 has a preset length along the axial direction of the rotating member 21 to ensure that the limiting groove 211 has a good limiting effect on the connecting rod 13 and improve the reliability of the connecting rod 13 being engaged in the limiting groove 211. Furthermore, the preset length can be set according to actual needs.

[0074] Optionally, the connecting rod 13 may be rotatably connected to the second housing 22 , which may improve the reliability and stability of the movable connection between the connecting rod 13 and the second housing 22 .

[0075] Optionally, the connecting rod 13 and the first housing 11 may be connected via a first bearing 4 , which can improve the reliability of the rotational connection between the connecting rod 13 and the first housing 11 .

[0076] Specifically, a first fixing member may be provided on the side of the first housing 11 opposite to the connecting rod 13, and a second fixing member may be provided on the side of the connecting rod 13 opposite to the first housing 11; the first bearing 4 may be connected to the first fixing member and the second fixing member respectively. Further, one of the first fixing member and the second fixing member may be a groove, and the other may be a protruding structure. The first bearing 4 is a rolling bearing, and the outer ring of the first bearing 4 may be embedded in the groove, and the inner ring of the first bearing 4 may be sleeved on the protruding structure.

[0077] Optionally, the connecting rod 13 is arranged between the inner periphery of the first shell 11 and the outer periphery of the rotating member 21; the elastic member 12 is arranged between the inner periphery of the first shell 11 and the outer periphery of the rotating member 21; the connecting rod 13 extends along the first direction, and the elastic member 12 extends along the second direction, and the angle between the second direction and the first direction is an acute angle, which facilitates the connecting rod 13 to squeeze the elastic member 12 under the action of centrifugal force, thereby improving the reliability of the detachable connection between the connecting rod 13 and the rotating member 21.

[0078] Specifically, Figure 1 As shown, taking a set of correspondingly arranged connecting rods 13 and elastic members 12 as an example, the extension direction of the connecting rod 13 is the length direction of the connecting rod 13, that is, the direction indicated by arrow S1, and the extension direction of the elastic member 12 is the length direction of the elastic member 12, that is, the direction indicated by arrow S2.

[0079] Specifically, the radial direction of the rotating member 21 through the connecting rod 13 is the third direction, and the angle between the third direction and the first direction can be an acute angle or a right angle, so that the connecting rod 13 can slide out of or into the limiting groove 211 on the rotating member 21.

[0080] Specifically, the first shell 11 may include a first cylinder and a first bottom plate connected to one end of the first cylinder.

[0081] Specifically, the elastic member 12 may be fixedly connected to the inner periphery of the first cylinder, or the elastic member 12 may be fixedly connected to the first bottom plate, and the fixing method may be bonding, welding, etc. Further, a first pit may be provided on the inner wall of the first cylinder, and one end of the elastic member 12 may be fixedly connected to the first pit, so that the first pit can limit the elastic member 12; or a protruding structure may be provided on the first bottom plate, and one end of the elastic member 12 may be fixedly connected to the protruding structure.

[0082] Specifically, a second pit may be provided on the connecting rod 13 , and the other end of the elastic member 12 may be fixedly connected in the second pit, and the second pit and the elastic member 12 may play a limiting role.

[0083] Specifically, the connecting rod 13 may be movably connected to the first bottom plate.

[0084] Optionally, the elastic member 12 can be an arc spring, so that the telescopic path of the elastic member 12 is arc-shaped, and the running trajectory of the connecting rod 13 is arc-shaped, so that the connecting rod 13 can compress the elastic member 12 along the telescopic direction of the elastic member 12, which can improve the force stability of the elastic member 12 and ensure the service life of the elastic member 12.

[0085] Optionally, the connecting rod 13 includes a first end, a second end and a connecting portion arranged between the first end and the second end; the connecting portion is arranged close to the first end, and the connecting portion is rotatably connected to the first shell 11; in the first working state, the second end is connected to the rotating member 21; in the second working state, the second end compresses the elastic member 12 and is separated from the rotating member 21.

[0086] In an embodiment of the present invention, the connecting portion of the connecting rod 13 is arranged between the first end and the second end, and the connecting portion is rotatably connected to the first shell 11, so that the first end and the second end of the connecting rod 13 can both rotate relative to the first shell 11, thereby realizing the rotatable connection of the connecting rod 13 to the first shell 11.

[0087] Optionally, a limiting member 14 is provided on the first shell 11 , and the limiting member 14 encloses an arc groove 141 ; the first end is arranged corresponding to the arc groove 141 , the first end is embedded in the arc groove 141 , and the first end is movably connected to the limiting member 14 .

[0088] In the embodiment of the present invention, the arc groove 141 can limit the first end of the connecting rod 13, and the limiting member 14 can apply friction force to the first end of the connecting rod 13 to buffer the rotation of the connecting rod 13, reduce the impact force of the connecting rod 13 on the rotating member 21, and avoid noise.

[0089] Specifically, the first end of the connecting rod 13 swings freely in the limiting groove 211, and the limiting groove 211 can play a circumferential limiting role on the connecting rod 13. The first end can contact the limiting member 14, so that the limiting member 14 provides friction force on the first end.

[0090] Specifically, a side of the first end portion facing the limiting member 14 may have an arc-shaped surface, so that the arc-shaped surface of the first end portion can contact the limiting member 14 .

[0091] Specifically, the limiting member 14 may be fixedly connected to the first housing 11 by bonding, welding or bolting.

[0092] Optionally, the first connecting assembly 1 further includes a first shaft rod 15 for connecting to a wheel; the first shaft rod 15 may be connected to the first housing 11 .

[0093] In an embodiment of the present invention, the first shaft 15 is respectively connected to the wheel and the first shell 11, so that the first shaft 15, the wheel and the first shell 11 can move synchronously. Since the first shell 11 is connected to the connecting rod 13, it is convenient to realize the transmission of force between the connecting rod 13 and the wheel, and the reliability of the detachability of the connecting rod 13 and the rotating part 21 can be improved.

[0094] Specifically, the first shaft rod 15 may be connected to the wheel via a spline, so that the first shaft rod 15 maintains a rigid connection with the wheel.

[0095] Specifically, the first shaft 15 may be connected to the first housing 11 via a spline, so that a rigid connection is maintained between the first shaft 15 and the first housing 11 .

[0096] In some other optional embodiments of the present invention, the second connecting assembly 2 may include a second shell 22; the first shell 11 and the second shell 22 are connected and enclosed to form a sealed cavity 7; the elastic member 12, the connecting rod 13 and the rotating member 21 are all arranged in the sealed cavity 7, so as to protect the elastic member 12, the connecting rod 13 and the rotating member 21, so as to improve the service life of the connecting mechanism.

[0097] Specifically, the second housing 22 is connected to the first housing 11 so that the second housing 22 rotates with the first housing 11. The second housing 22 and the first housing 11 are fixedly connected, and the connection method can be bonding, bolt connection, etc., and the specific connection method is not limited.

[0098] Specifically, the first shell 11 may have a certain thickness to maintain sufficient rigidity, and the specific thickness may be set according to actual needs. The second shell 22 may be stamped from a thin-walled material. The first shell 11 and the second shell 22 are rigidly connected. For example, the first shell 11 and the second shell 22 may be bonded and fixed by a sealant, which may improve the sealing effect of the sealed cavity 7.

[0099] Specifically, the first shell 11 may include a first cylinder and a first bottom plate connected to one end of the first cylinder, the second shell 22 may include a second cylinder and a second bottom plate connected to one end of the second cylinder, one end of the first cylinder away from the first bottom plate is connected to the end of the second cylinder away from the second bottom plate, and the first cylinder and the second cylinder are coaxial.

[0100] Specifically, a first flange 111 is provided at one end of the first cylinder away from the first bottom plate, and a second flange 221 is provided at one end of the second cylinder away from the second bottom plate; Figure 2 As shown, the first flange 111 and the second flange 221 are abutted, and both the first flange 111 and the second flange 221 can be provided with threaded holes 112 to facilitate fixing the first flange 111 and the second flange 221 by fasteners 6, wherein a plurality of fasteners 6 can be arranged at intervals along the circumference of the first cylinder.

[0101] Specifically, the first protrusion 111 and the second protrusion 221 have the same shape, and both can be annular plates.

[0102] Specifically, the first shaft rod 15 may be passed through the first bottom plate, and the axial direction of the first shaft rod 15 is the same as the axial direction of the first cylinder.

[0103] Optionally, the sealing cavity 7 is filled with a lubricant, which can play a lubricating role and improve the reliability of the rotation of components such as the connecting rod 13 and the rotating member 21.

[0104] Specifically, the lubricant may be grease or lubricating oil.

[0105] Optionally, the second connecting assembly 2 further comprises a second shaft 23 for connecting to the driving unit; the second shaft 23 is respectively connected to the second housing 22 and the rotating member 21 , so that the driving unit can drive the second housing 22 and the rotating member 21 to rotate through the second shaft 23 .

[0106] Specifically, the second shaft rod 23 may pass through the second bottom plate of the second shell 22 , and the axial direction of the second shaft rod 23 may be the same as the axial direction of the second bottom plate.

[0107] Specifically, the second shaft rod 23 may be connected to the differential through a spline, so that the second shaft rod 23 may maintain a rigid connection with the differential.

[0108] Specifically, the second shaft rod 23 may be connected to the rotating member 21 via a spline, so that the second shaft rod 23 may maintain a rigid connection with the rotating member 21 .

[0109] Optionally, the second shaft rod 23 and the second housing 22 are connected via a second bearing 5 , so as to facilitate the rotational connection between the second shaft rod 23 and the second housing 22 .

[0110] Specifically, a through hole may be provided on the second bottom plate of the second shell 22, and the second shaft rod 23 may be passed through the through hole; the second bearing 5 may be a rolling bearing, the inner ring of the second bearing 5 may be pressed onto the second shaft rod 23, and the outer ring of the second bearing 5 may be pressed into the through hole on the second shell 22.

[0111] Optionally, a sealing ring 3 is provided between the second shaft 23 and the second housing 22 . The sealing ring 3 can play a sealing effect, thereby improving the sealing performance of the sealing cavity 7 and preventing the lubricant from leaking out.

[0112] Specifically, the sealing ring 3 can be sleeved outside the second shaft rod 23 , and the dust lip of the sealing ring 3 cooperates with the second shaft rod 23 to ensure the sealing performance of the sealing cavity 7 .

[0113] In an embodiment of the present invention, when the preset vehicle speed is reached, the driving unit stops driving, the first shell 11 and the rotating member 21 rotate in the same direction, the rotation speed of the first shell 11 is greater than that of the rotating member 21, and the first shell 11 drives the connecting rod 13 to rotate synchronously, so that the connecting rod 13 and the limiting groove 211 on the rotating member 21 slide. At the same time, under the action of centrifugal force, the connecting rod 13 compresses the elastic member 12 and leaves the rotating member 21. Under the limiting action of the arc groove 141 of the limiting member 14, the connecting rod 13 is in a suspended equilibrium state, and the separation between the first connecting component 1 and the second connecting component 2 can be achieved. At this time, the wheel rotates and the driving unit is in a stopped state.

[0114] When the vehicle speed gradually starts to decrease, the rotation speed of the first shell 11 and the connecting rod 13 gradually decreases, and the centrifugal force decreases. When the vehicle speed is lower than the preset vehicle speed, the centrifugal force cannot overcome the tension of the elastic member 12. At the same time, under the limiting action of the arc groove 141, the connecting rod 13 gradually engages with the limiting groove 211 on the rotating member 21, so that the first connecting component 1 and the second connecting component 2 are connected, the driving unit is started, the second shaft rod 23 rotates, and the second shaft rod 23 drives the rotating member 21 to rotate. The torque of the rotating member 21 is transmitted to the connecting rod 13, and the connecting rod 13 transmits the torque to the first bearing 4. The first bearing 4 transmits the torque to the first shell 11. The first shell 11 transmits the torque to the first shaft rod 15, and the first shaft rod 15 drives the wheel to rotate forward.

[0115] The connection mechanism described in the embodiment of the present invention has at least the following advantages:

[0116] In an embodiment of the present invention, when the connecting mechanism is in the second working state, the first connecting component and the second connecting component are disconnected. Since the first connecting component is connected to the wheel and the second connecting component is connected to the driving unit, when the driving unit stops driving, there is no need to drive the second connecting component to move during the rotation of the wheel, which can reduce the loss of driving energy and increase the vehicle's cruising range.

[0117] In a second aspect, an embodiment of the present invention further discloses a driving device, including a connecting mechanism between the above-mentioned wheel and the driving unit, which also has the advantages that can be achieved by the above-mentioned connecting mechanism and will not be described in detail.

[0118] On the third aspect, an embodiment of the present invention further discloses a vehicle, including the connecting mechanism between the wheels and the drive unit or the driving device, which also has the advantages that can be achieved by the connecting mechanism or the driving device, and will not be described in detail.

[0119] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0120] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0121] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0122] The above is a detailed introduction to a connection mechanism between a wheel and a drive unit, a drive device and a vehicle provided by the present invention. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A connection mechanism between a wheel and a drive unit, characterized in that: include: A first connection component (1) for connecting to the wheel and a second connection component (2) for connecting to the drive unit; wherein: The connecting mechanism has a first working state and a second working state. In the first working state, the first connecting component (1) and the second connecting component (2) are connected, and the second connecting component (2) transmits the driving force of the driving unit to the wheel through the first connecting component (1); in the second working state, the first connecting component (1) and the second connecting component (2) are disconnected.

2. The connection mechanism according to claim 1, characterized in that: The first connecting assembly (1) comprises a first housing (11), an elastic member (12) and a connecting rod (13), and the second connecting assembly (2) comprises a rotating member (21); One end of the elastic member (12) is connected to the first shell (11), and the other end of the elastic member (12) is connected to the connecting rod (13); one end of the connecting rod (13) is movably connected to the first shell (11); In the first working state, the other end of the connecting rod (13) is connected to the rotating member (21); in the second working state, the other end of the connecting rod (13) compresses the elastic member (12) and is separated from the rotating member (21).

3. The connection mechanism according to claim 2, characterized in that: The rotating member (21) is provided with a plurality of limiting grooves (211) in the circumferential direction; The connecting rod (13) and the limiting groove (211) are arranged correspondingly; In the first working state, the connecting rod (13) is limited in one of the limiting grooves (211).

4. The connection mechanism according to claim 3, characterized in that: The limiting groove (211) comprises a first side wall (2111) and a second side wall (2112) opposite to each other along the circumference of the rotating member (21); the rotating member (21) intersects with the first side wall (2111) in the radial direction of the first side wall (2111); and the rotating member (21) intersects with the second side wall (2112) in the radial direction of the second side wall (2112).

5. The connection mechanism according to claim 2, characterized in that: The connecting rod (13) is rotatably connected to the first shell (11).

6. The connection mechanism according to claim 5, characterized in that: The connecting rod (13) and the first housing (11) are connected via a first bearing (4).

7. The connection mechanism according to claim 2, characterized in that: The connecting rod (13) is arranged between the inner periphery of the first shell (11) and the outer periphery of the rotating member (21); the elastic member (12) is arranged between the inner periphery of the first shell (11) and the connecting rod (13); The connecting rod (13) extends along a first direction, the elastic member (12) extends along a second direction, and the angle between the second direction and the first direction is an acute angle.

8. The connection mechanism according to claim 7, characterized in that: The elastic member (12) is an arc spring.

9. The connection mechanism according to claim 2, characterized in that: The connecting rod (13) comprises an opposite first end, a second end and a connecting portion arranged between the first end and the second end; The connecting portion is arranged close to the first end portion, and the connecting portion is rotatably connected to the first shell (11); In the first working state, the second end is connected to the rotating member (21); in the second working state, the second end compresses the elastic member (12) and is separated from the rotating member (21).

10. The connection mechanism according to claim 9, characterized in that: The first shell (11) is provided with a limiting member (14), and the limiting member (14) is enclosed to form an arc-shaped groove (141); The first end portion is arranged corresponding to the arc-shaped groove (141), the first end portion is embedded in the arc-shaped groove (141), and the first end portion is movably connected to the limiting member (14).

11. The connection mechanism according to claim 2, characterized in that: The first connecting assembly (1) further comprises a first shaft (15) for connecting to the wheel; The first shaft (15) is connected to the first shell (11).

12. The connection mechanism according to claim 2, characterized in that: The second connecting assembly (2) further comprises a second housing (22); The first shell (11) and the second shell (22) are connected and enclosed to form a sealed cavity (7); The elastic member (12), the connecting rod (13) and the rotating member (21) are all arranged in the sealing cavity (7).

13. The connection mechanism according to claim 12, characterized in that: The sealing cavity (7) is filled with lubricant.

14. The connection mechanism according to claim 12, characterized in that: The second connecting assembly (2) further comprises a second shaft (23) for connecting to the driving unit; The second shaft (23) is connected to the second shell (22) and the rotating member (21) respectively.

15. The connection mechanism according to claim 14, characterized in that: The second shaft (23) and the second housing (22) are connected via a second bearing (5).

16. The connection mechanism according to claim 14, characterized in that: A sealing ring (3) is provided between the second shaft (23) and the second housing (22).

17. The connection mechanism according to claim 2, characterized in that: The connecting rod (13) and the rotating member (21) both rotate around the axis of the rotating member (21).

18. A driving device, characterized in that: The invention comprises a connecting mechanism between a wheel and a drive unit as claimed in any one of claims 1 to 17.

19. A vehicle, characterized in that: It comprises the connecting mechanism between the wheel and the drive unit as described in any one of claims 1 to 17 or the drive device as described in claim 18.

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