Electromagnetic clutch, electromagnetic clutch assembly, power device and vehicle

Abstract

The invention provides an electromagnetic clutch, an electromagnetic clutch assembly, a power device and a vehicle, the electromagnetic clutch comprises a connecting piece, a sliding sleeve and an excitation piece, the sliding sleeve is in sliding connection with the connecting piece, and the excitation piece is arranged on the outer side of the sliding sleeve; the excitation part can generate electromagnetic induction with the sliding sleeve and drive the sliding sleeve to move, so that the sliding sleeve can be connected with the first transmission part or the second transmission part, then different gears are formed, the structure is simple, and then the vehicle can output a larger vehicle speed range.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and mainly relates to an electromagnetic clutch, an electromagnetic clutch component, a power device and a vehicle. Background Art

[0002] In the power unit of an automobile, a gear switching device for switching gears, i.e., a synchronizer, is usually provided. Through the setting of the synchronizer, power output of different gears of the power unit can be achieved. However, the power unit equipped with a synchronizer also needs to be equipped with a shift fork, a linear bearing, a synchronizer, a synchronizer ring, a hydraulic system, etc. for manipulating the synchronizer to perform actions, which makes the power unit complicated. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an electromagnetic clutch, an electromagnetic clutch assembly, a power device and a vehicle, which can automatically achieve multiple gear switching, output a larger vehicle speed range, and have a simpler structure.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An electromagnetic clutch comprises: a connecting member; a sleeve slidably connected to the circumferential outer side of the connecting member and capable of axially moving relative to the connecting member, wherein both axial ends of the sleeve are provided with a clamping structure, and the clamping structures located at both ends of the sleeve can be respectively connected to different transmission members, and the sleeve is an integrated structure; an excitation member, which is arranged on the circumferential outer side of the sleeve and can generate electromagnetic induction with the sleeve and drive the sleeve to move axially so that the sleeve is connected to different transmission members.

[0006] In some schemes of the present application, the electromagnetic clutch also includes: a reset elastic member, which is arranged along the axial direction of the connecting member, and one end of the reset elastic member cooperates with the connecting member, and the other end cooperates with the sliding sleeve, for driving the sliding sleeve to separate from the transmission member.

[0007] In some schemes of the present application, a positioning groove is provided on the inner wall surface of the sliding sleeve; the electromagnetic clutch also includes: an auxiliary return elastic member, which is arranged on the connecting member and abuts against the inner wall surface of the sliding sleeve, and when the sliding sleeve is separated from the transmission member, the auxiliary return elastic member is engaged in the positioning groove.

[0008] In some schemes of the present application, the connecting member includes a gear hub, and a spring mounting groove is provided on the circumferential outer surface of the gear hub, and the spring mounting groove is arranged along the radial direction of the gear hub; the auxiliary return elastic member includes a first spring and a ball, the first spring is placed in the spring mounting groove, the ball is located between the first spring and the sliding sleeve, and the ball abuts against the sliding sleeve.

[0009] In some schemes of the present application, the connecting member also includes a pressure plate, which is configured in two pieces and are respectively fixed at the two axial ends of the gear hub; a protrusion is provided on the inner wall surface of the sliding sleeve, and the protrusion is located between the two pressure plates, and the reset elastic member is elastically connected between the protrusion and the two pressure plates.

[0010] In some schemes of the present application, the gear hub is provided with a pressure plate mounting groove and an avoidance groove at both ends of the axial direction, the diameter of the pressure plate mounting groove is smaller than the diameter of the gear hub, one end of the avoidance groove is connected to the pressure plate mounting groove, and the other end is connected to the circumferential outer surface of the gear hub; the pressure plate includes a fixing ring and a connecting protrusion, the fixing ring is interference connected in the pressure plate mounting groove, one end of the connecting protrusion is connected to the circumferential outer side of the fixing ring, and the other end passes through the avoidance groove and extends to the circumferential outer side of the gear hub; the end of the reset elastic member away from the protrusion abuts against the connecting protrusion.

[0011] In some schemes of the present application, a reset elastic member installation groove is provided on the circumferential outer surface of the gear hub, and the reset elastic member installation groove is connected to the avoidance grooves at both ends of the gear hub, and the reset elastic member and the protrusion are located in the reset elastic member installation groove; a spline groove is provided on the circumferential outer surface of the gear hub, and the length direction of the spline groove is arranged along the axial direction of the gear hub, and the inner wall surface of the sliding sleeve is provided with spline teeth, and the spline teeth are slidably matched with the spline groove; the spline groove, the connecting protrusion and the auxiliary return elastic member are all arranged in plurality at intervals along the circumference of the gear hub; any two of the spline groove, the connecting protrusion and the auxiliary return elastic member are staggered.

[0012] In some schemes of the present application, the spline groove is connected to the two axial end faces of the gear hub; the fixing structure includes a first latch tooth and a second latch tooth, the first latch tooth is arranged at the first end of the sleeve, and can cooperate with the transmission member near the first end of the sleeve; the second latch tooth is arranged at the second end of the sleeve, and can cooperate with the transmission member near the second end of the sleeve, and the first latch tooth and the second latch tooth are arranged on the same straight line as the spline tooth.

[0013] In some embodiments of the present application, the excitation element includes a coil, and the current of the coil is 2A-2.5A.

[0014] In some embodiments of the present application, the current of the coil is 2.2A-2.5A.

[0015] The coil includes a first coil and a second coil, the first coil is arranged outside the first end of the sleeve, and can electromagnetically induce the sleeve to drive the sleeve to move in a first direction, the second coil is arranged outside the second end of the sleeve, and can electromagnetically induce the sleeve to drive the sleeve to move in a second direction, and the first direction is opposite to the second direction.

[0016] In some schemes of the present application, the first coil and the second coil are symmetrically arranged; the excitation member further includes a first shell, a first end cover, a second shell and a second end cover, the first shell is arranged on the outer side of the first end of the sleeve, a first coil mounting groove is provided on one axial end face of the first shell, the first coil is fixed in the first coil mounting groove, the first end cover is fixed on the first shell and abuts against the first coil, the inner diameter of the first end cover is smaller than the outer diameter of the first end of the sleeve, and a first gap is provided between the first end portion of the sleeve and the first end cover; the first shell is arranged on the outer side of the first end of the sleeve, a second coil mounting groove is provided on one axial end face of the second shell, the second coil is fixed in the second coil mounting groove, the second end cover is fixed on the second shell and abuts against the second coil, the inner diameter of the second end cover is smaller than the outer diameter of the second end of the sleeve, and a second gap is provided between the second end portion of the sleeve and the second end cover; the first shell is fixedly connected to the second shell, and the first end cover is provided at one end of the first shell away from the second shell, and the second end cover is provided at one end of the second shell away from the first shell.

[0017] In some solutions of the present application, the sliding sleeve is a steel part or an iron part.

[0018] An electromagnetic clutch assembly comprises: the electromagnetic clutch as described above; a first transmission member, arranged on one axial side of the connecting member, the first transmission member is provided with a first connecting structure, and the fixing structure can be engaged with the first connecting structure; a second transmission member, arranged on a side of the connecting member away from the first transmission member, the first transmission member is provided with a second connecting structure, and the fixing structure can be engaged with the second connecting structure.

[0019] In some solutions of the present application, the first connection structure and the second connection structure are both card slots.

[0020] In some solutions of the present application, a limiting strip is provided on the inner wall surface of the sliding sleeve, and a first end portion of the limiting strip can abut against the first transmission member, and a second end portion of the limiting strip can abut against the second transmission member.

[0021] In some solutions of the present application, the electromagnetic clutch further includes: a main shaft fixedly connected to the connecting member, and the first transmission member and the second transmission member are both rotatably connected to the main shaft.

[0022] A power device includes the electromagnetic clutch assembly, wherein the electromagnetic clutch assembly can drive the sleeve to be connected to the first transmission member through the clamping structure, or the electromagnetic clutch assembly can drive the sleeve to be connected to the second transmission shaft through the clamping structure, and the transmission ratio between the first transmission member and the sleeve is different from the transmission ratio between the second transmission member and the sleeve.

[0023] A vehicle comprises a vehicle body, wheels and a power device, wherein the power device is fixedly connected to the vehicle body, and the wheels are transmission-connected to the power device.

[0024] Beneficial effects: The electromagnetic clutch of the present application includes a connecting part, a sleeve and an excitation part. The sleeve is slidably connected to the connecting part, and the excitation part is arranged on the outside of the sleeve. The excitation part can generate electromagnetic induction with the sleeve and drive the sleeve to move, so that the sleeve can be connected to different transmission parts to form different gears, and the structure is simple.

[0025] The electromagnetic clutch assembly of the present application includes an electromagnetic clutch, a first transmission member and a second transmission member. Under the drive of the excitation member, the sleeve can be connected to the first transmission member or the second transmission member, thereby realizing switching between different gears.

[0026] The power device of the present application includes an electromagnetic clutch assembly, which realizes switching between different gears by controlling the electromagnetic clutch assembly, thereby outputting a larger vehicle speed range.

[0027] The vehicle of the present application includes a vehicle body, wheels and a power unit. The power unit is mounted on the vehicle body, and the wheels are transmission-connected to the power unit. The power unit can switch between multiple gears to achieve a wider output speed range. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic cross-sectional structural diagram of an electromagnetic clutch in one embodiment of the present application.

[0029] Figure 2 It is a schematic cross-sectional structural diagram of an electromagnetic clutch assembly in one embodiment of the present application.

[0030] Figure 3 It is a schematic cross-sectional structural diagram of an electromagnetic clutch assembly in another embodiment of the present application.

[0031] Figure 4 It is a structural schematic diagram of the sliding sleeve.

[0032] Figure 5 It is a schematic diagram of the structure of the gear hub.

[0033] Figure 6 It is a structural schematic diagram of the pressure plate.

[0034] Figure 7 It is a structural schematic diagram of the auxiliary return elastic member.

[0035] Figure 8 It is a schematic structural diagram of the first shell.

[0036] Main component symbol description: 1-connector; 11-gear hub; 111-pressing plate mounting groove; 112-avoidance groove; 113-reset elastic member mounting groove; 114-spline groove; 115-spring mounting groove; 12-pressing plate; 121-fixing ring; 122-connecting protrusion; 2-sliding sleeve; 21-fixing structure; 211-first clamping tooth; 212-second clamping tooth; 22-positioning groove; 23-protrusion; 24-spline tooth; 25-limiting strip; 3-excitation member; 31-first coil assembly; 32-second coil assembly, 31 1-first housing; 312-first coil; 313-first end cover; 314-first coil mounting groove; 315-first gap; 321-second housing; 322-second coil; 323-second end cover; 324-second gap; 4-reset elastic member; 5-auxiliary return elastic member; 51-first spring; 52-ball; 100-electromagnetic clutch assembly; 10-electromagnetic clutch; 20-first transmission member; 201-first connecting structure; 30-second transmission member; 301-second connecting structure; 40-spindle. DETAILED DESCRIPTION

[0037] The present invention provides an electromagnetic clutch, an electromagnetic clutch assembly, a power device and a vehicle. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] A vehicle comprises a vehicle body, wheels and a power device, wherein the power device is fixed on the vehicle body, the wheels are drivingly connected to the output end of the power device, and the power device drives the wheels to rotate to realize the movement of the vehicle.

[0041] Embodiment 1:

[0042] See also Figure 1 and Figure 2 The power device includes an electromagnetic clutch 10, a first transmission member 20, and a second transmission member 30. The first transmission member 20 and the second transmission member 30 are different transmission members of the power device. The electromagnetic clutch 10 can be connected to the first transmission member 20 to form a "first gear", and the electromagnetic clutch 10 can also be connected to the second transmission member 30 to form a "second gear", wherein the electromagnetic clutch 10 cannot be connected to the first transmission member 20 and the second transmission member 30 at the same time, that is, when the electromagnetic clutch 10 is connected to the first transmission member 20, the electromagnetic clutch 10 is separated from the second transmission member 30, and when the electromagnetic clutch 10 is connected to the second transmission member 30, the electromagnetic clutch 10 is separated from the first transmission member 20, so that the power device transmits power through the first transmission member 20 or the second transmission member 30.

[0043] The electromagnetic clutch 10 includes a connector 1, a sleeve 2 and an excitation member 3. The connector 1, the sleeve 2 and the excitation member 3 are coaxially arranged. The first transmission member 20 and the second transmission member 30 are respectively arranged on both sides of the sleeve 2 in the axial direction, that is, the first transmission member 20 is arranged on the outer side of the first end of the sleeve 2, and the second transmission member 30 is arranged on the outer side of the second end of the sleeve 2. The connector 1 is used to connect with the power input mechanism of the power device and is slidably connected with the sleeve 2. The sleeve 2 is slidably connected to the circumferential outer side of the connector 1 and can move axially relative to the connector 1. When the power input mechanism drives the connector 1 to rotate, the sleeve 2 can be driven to rotate. The excitation member 3 is arranged on the circumferential outer side of the sleeve 2, and the sleeve 2 can generate electromagnetic induction with the excitation member 3. When the excitation member 3 is powered on, a magnetic field can be generated, thereby causing the sleeve 2 to move under the action of the magnetic field of the excitation member 3. When the power is off, the magnetic field disappears.

[0044] The sliding sleeve 2 is an integrated structure, which makes the production of the sliding sleeve 2 and the assembly of the electromagnetic clutch 10 more convenient and makes the structure more compact.

[0045] In the above, the power input mechanism can be one or more of a motor and an engine, that is, the electromagnetic clutch 10 can be applied to a hybrid power device, a pure electric power device, and an engine-driven power device. Further, the vehicle can be a hybrid vehicle, a pure electric vehicle, and a gasoline vehicle.

[0046] See also Figure 1 and Figure 4 , both axial ends of the sleeve 2 are provided with a clamping structure 21, so that when the magnetic field generated by the excitation member 3 generates electromagnetic induction with the sleeve 2 and drives the sleeve 2 to move axially, the sleeve 2 is connected to the first transmission member 20 or the second transmission member 30 through the clamping structure 21, so that the power of the power input mechanism is transmitted through the connecting member 1, the sleeve 2 and the first transmission member 20, and can also be transmitted through the connecting member 1, the sleeve 2 and the second transmission member 30. Among them, the transmission ratio between the first transmission member 20 and the sleeve 2 is different from the transmission ratio between the second transmission member 30 and the sleeve 2, so that the power device can output two different vehicle speeds, and the speed range of the output end of the power device is increased, that is, the vehicle can output a larger vehicle speed range.

[0047] In other embodiments, the first transmission member 20 and the second transmission member 30 are used to connect to the power input mechanism of the power device, and the connecting member 1 is used for power output, that is, the power of the power input mechanism is transmitted through the first transmission member 20, the sleeve 2 and the connecting member 1, or is transmitted through the second transmission member 30, the sleeve 2 and the connecting member 1.

[0048] The position of the excitation member 3 is fixed, the sleeve 2 can rotate relative to the excitation member 3 and can move along the axial direction of the excitation member 3, and the connecting member 1 can rotate relative to the excitation member 3, but cannot move relative to the excitation member 3. The sleeve 2 can conduct magnetism, so when the excitation member 3 is energized, a magnetic field is generated, and the sleeve 2 moves under the action of the magnetic field generated by the excitation member 3, thereby connecting the sleeve 2 to the first transmission member 20 to form a "first gear", or connecting the sleeve 2 to the second transmission member 30 to form a "second gear".

[0049] For example, when the sleeve 2 is connected to the first transmission member 20, the output speed is low and the torque is high. When the vehicle starts, the electromagnetic clutch 10 is controlled to switch to the state where the sleeve 2 is connected to the first transmission member 20, so as to output a larger torque, that is, the vehicle has a larger starting power. When the vehicle speed is greater than the preset speed threshold, the electromagnetic clutch 10 is controlled to switch to the state where the sleeve 2 is connected to the second transmission member 30. When the sleeve 2 is connected to the second transmission member 30, the output speed is high and the torque is low, so as to output a larger rotation speed, that is, the vehicle has a higher vehicle speed.

[0050] In the above, the sleeve 2 can generate electromagnetic induction with the excitation member 3, that is, the sleeve 2 is an armature of an electromagnetic induction structure, therefore, no additional armature is required, making the structure of the electromagnetic clutch 10 simpler and more compact, and reducing the cost. Moreover, the excitation member 3 drives the sleeve 2 to move to achieve the gear shifting, and compared with the traditional synchronizer, there is no need to set the shift fork, linear bearing, synchronizer, synchronizer ring, hydraulic system, etc. for manipulating the synchronizer to perform the action, making it smaller in size, lighter in weight and lower in cost.

[0051] In one embodiment, the sleeve 2 is made of iron, which is magnetically conductive, so that the sleeve 2 can generate electromagnetic induction with the excitation component 3. Since the iron sleeve 2 may cause magnetic leakage, the current of the coil of the excitation component 3 can be increased to ensure that the magnetic attraction can drive the sleeve 2 to move.

[0052] In one embodiment, the sleeve 2 is a steel member, which is magnetically conductive, so that the sleeve 2 can generate electromagnetic induction with the excitation member 3, and the strength of the steel member is better than that of the iron member, thereby ensuring the service life of the sleeve 2. In order to avoid insufficient magnetic force due to magnetic leakage of the sleeve 2, the current of the coil of the excitation member 3 can be increased to ensure that the magnetic attraction can drive the sleeve 2 to move.

[0053] See also Figure 1 and Figure 5 In one embodiment, the connector 1 includes a gear hub 11, which is slidably connected to the sleeve 2. A spline groove 114 is provided on the circumferential outer surface of the gear hub 11, and the length direction of the spline groove 114 is arranged along the axial direction of the gear hub 11. The inner wall surface of the sleeve 2 is provided with spline teeth 24, and the spline teeth 24 cooperate with the spline groove 114 to achieve a sliding connection between the gear hub 11 and the sleeve 2, that is, a sliding connection between the connector 1 and the sleeve 2.

[0054] The clamping structure 21 includes a first clamping tooth 211 and a second clamping tooth 212. The first clamping tooth is arranged at the first end of the sliding sleeve, and the second clamping tooth is arranged at the second end of the sliding sleeve. The first transmission member 20 is provided with a first connecting structure 201. When the sliding sleeve 2 moves toward the first transmission member 20, the first clamping tooth 211 can cooperate with the first connecting structure 201 to achieve the connection between the sliding sleeve 2 and the first transmission member 20. Similarly, the second transmission member 30 is provided with a second connecting structure 301. When the sliding sleeve 2 moves toward the second transmission member 30, the second clamping tooth 212 can cooperate with the second connecting structure 301 to achieve the connection between the sliding sleeve 2 and the second transmission member 30.

[0055] exist Figure 1 In the illustrated embodiment, both the first connection structure 201 and the second connection structure 301 are slots that can be engaged with the fixing structure 21. The first connection structure 201 is disposed on the circumferential outer surface of one end of the first transmission member 20 close to the sleeve 2, and the second connection structure 301 is disposed on the circumferential outer surface of one end of the second transmission member 30 close to the sleeve 2.

[0056] exist Figure 1 In the embodiment shown, the first latching tooth 211 and the second latching tooth 212 are arranged on the same straight line as the spline tooth 24, that is, the first latching tooth 211 and the second latching tooth 212 are both arranged on the inner wall surface of the sleeve 2, and form an integral body with the spline tooth 24, so that the structure of the sleeve 2 is simpler and the production is convenient. In other words, the first latching tooth 211 and the second latching tooth 212 are part of the spline tooth 24, that is, the spline tooth 24 can cooperate with the spline groove 114, and can also cooperate with the first connection structure 201 and the second connection structure 301. In other embodiments, the first latching tooth 211 and the second latching tooth 212 can be respectively arranged on the end surface of the sleeve 2.

[0057] The electromagnetic clutch 10 also includes a reset elastic member 4, which is arranged along the axial direction of the connecting member 1, and one end of the reset elastic member 4 cooperates with the connecting member 1, and the other end cooperates with the sliding sleeve 2. When the excitation member 3 is in a power-off state, the reset elastic member 4 can push the sliding sleeve 2 to reset to a position between the "first gear" and the "second gear". When the sliding sleeve 2 is located between the "first gear" and the "second gear", the sliding sleeve 2 is neither connected to the first transmission member 20 nor to the second transmission member 30, so the sliding sleeve 2 and the first transmission member 20, and the sliding sleeve 2 and the second transmission member 30 cannot transmit power, forming a "neutral gear".

[0058] In the above, the resetting elastic member 4 can be one or more of a compression spring and a disc spring.

[0059] See also Figure 1In one embodiment, the connector 1 further includes a pressing plate 12, which is provided with two pressing plates 12, and the two pressing plates 12 are respectively fixed at the two axial ends of the gear hub 11. A protrusion 23 is provided on the inner wall surface of the sleeve 2, and the protrusion 23 is located between the two pressing plates 12. A reset elastic member 4 is elastically connected between the protrusion 23 and the two pressing plates 12. One end of the reset elastic member 4 is connected to the protrusion 23, and the other end is connected to the pressing plate 12, so that the reset elastic member 4 can push the sleeve 2 to move, so as to achieve the reset of the sleeve 2.

[0060] exist Figure 1 In the illustrated embodiment, the protrusion 23 is arranged at the middle part of the sleeve 2 along the axial direction, and a reset elastic member 4 is arranged between the two pressure plates 12 and the protrusion 23. When the sleeve 2 moves from the "neutral" position to the "first gear" position, the reset elastic member 4 close to the first transmission member 20 is elastically compressed and stores energy. When the excitation member 3 loses power, the sleeve 2 loses the magnetic force of electromagnetic induction, and the reset elastic member 4 releases energy to push the sleeve 2 from the "first gear" position to the "neutral" position, thereby resetting the sleeve 2. Similarly, when the sleeve 2 moves from the "neutral" position to the "second gear" position, the reset elastic member 4 close to the second transmission member 30 is elastically compressed and stores energy. When the excitation member 3 loses power, the sleeve 2 loses the magnetic force of electromagnetic induction, and the reset elastic member 4 releases energy to push the sleeve 2 from the "second gear" position to the "neutral" position, thereby resetting the sleeve 2.

[0061] See also Figure 1 , Figure 5 and Figure 6 In detail, the gear hub 11 is provided with a pressure plate mounting groove 111 and an avoidance groove 112 at both ends of the axial direction. The diameter of the pressure plate mounting groove 111 is smaller than the diameter of the gear hub 11. One end of the avoidance groove 112 is connected to the pressure plate mounting groove 111, and the other end is connected to the circumferential outer surface of the gear hub 11. The pressure plate 12 includes a fixing ring 121 and a connecting protrusion 122. The fixing ring 121 is installed in the pressure plate mounting groove 111. One end of the connecting protrusion 122 is fixed to the circumferential outer side of the fixing ring 121, and the other end passes through the avoidance groove 112 and extends to the circumferential outer side of the gear hub 11, forming a connecting position for connecting with the reset elastic member 4. The end of the reset elastic member 4 away from the protrusion 23 abuts on the connecting protrusion 122 to realize the connection between the reset elastic member 4 and the connecting member 1.

[0062] A reset elastic member installation groove 113 is provided on the circumferential outer surface of the gear hub 11, and the reset elastic member installation groove 113 is connected to the avoidance grooves 112 at both ends of the gear hub 11. The reset elastic member 4 and the protrusion 23 are located in the reset elastic member installation groove 113, so that there is no need to design a position for installing the reset elastic member 4 between the inner wall surface of the sliding sleeve 2 and the circumferential outer surface of the gear hub 11, making the structure more compact.

[0063] In the above, the reset elastic members 4 are symmetrically arranged in the axial direction of the connecting member 1. In the circumferential direction of the gear hub 11, a plurality of reset elastic members 4 are distributed, so that when the reset elastic members 4 push the sliding sleeve 2 to move, the sliding sleeve 2 is subjected to a more balanced force and moves more smoothly.

[0064] In one embodiment, the fixing ring 121 is interference-connected with the pressure plate mounting groove 111 so that the fixing ring 121 is fixed in the pressure plate mounting groove 111 . After the fixing ring 121 is connected to the gear hub 11 , no additional connection structure is required, making the structure more compact.

[0065] The electromagnetic clutch 10 further includes an auxiliary return elastic member 5, which is arranged on the gear hub 11 and can be expanded and contracted relative to the radial direction of the gear hub 11. The auxiliary return elastic member 5 elastically abuts against the inner wall surface of the sliding sleeve 2. A positioning groove 22 is provided on the inner wall surface of the sliding sleeve 2. When the sliding sleeve 2 is located at a position not connected to the transmission member, that is, when the sliding sleeve 2 is in the "neutral" position, the auxiliary return elastic member 5 is engaged in the positioning groove 22, so that the sliding sleeve 2 is accurately located in the "neutral" position, thereby making the reset accuracy of the electromagnetic clutch 10 higher and the reset function more reliable.

[0066] See also Figure 1 , Figure 5 and Figure 7 Specifically, the circumferential outer surface of the gear hub 11 is provided with a spring installation groove 115, and the spring installation groove 115 is arranged along the radial direction of the gear hub 11. The auxiliary return elastic member 5 includes a first spring 51 and a ball 52, and the first spring 51 and the ball 52 are both placed in the spring installation groove 115, and the ball 52 is located between the first spring 51 and the sliding sleeve 2. Under the elastic force of the first spring 51, the ball 52 presses against the inner wall surface of the sliding sleeve 2. When the sliding sleeve 2 is in the "neutral" position, the ball 52 can be engaged in the positioning groove 22. When the sliding sleeve 2 moves in the "first gear" or "second gear" direction, the ball 52 moves out of the positioning groove 22.

[0067] In the above, by setting the auxiliary return elastic member 5, when the sliding sleeve 2 is reset to the "neutral" position under the action of the reset elastic member 4, the ball 52 can be engaged in the positioning groove 22, so that the resistance of the sliding sleeve 2 to movement is increased, thereby stabilizing the sliding sleeve 2 in the "neutral" position, making the reset accuracy of the sliding sleeve 2 higher and the reset function more reliable. When the sliding sleeve 2 moves in the "first gear" or "second gear" direction, the sliding sleeve 2 moves the ball 52 out of the positioning groove 22 under the action of electromagnetic induction.

[0068] exist Figure 1 and Figure 5 In the illustrated embodiment, the spring installation groove 115 is a blind hole, and a plurality of spring installation grooves 115 are distributed along the circumferential direction of the gear hub 11 , so that when the ball 52 is engaged with the positioning groove 22 , the force on the sliding sleeve 2 in the circumferential direction is more balanced.

[0069] The spline groove 114, the connecting protrusion 122 and the auxiliary return elastic member 5 are arranged at intervals along the circumference of the gear hub 11, and any two of the spline groove 114, the connecting protrusion 122 and the auxiliary return elastic member 5 are staggered. Figure 3 In the illustrated embodiment, three groups of connecting protrusions 122 and auxiliary return elastic members 5 are arranged along the circumference of the gear hub 11, and the connecting protrusions 122 and the auxiliary return elastic members 5 are staggered, and spline grooves 114 are provided between the connecting protrusions 122 and the auxiliary return elastic members.

[0070] The spline groove 114 is connected to the two axial end surfaces of the gear hub 11, so that the spline groove 114 passes through the surfaces of the two axial ends of the gear hub 11. Therefore, the spline groove 114 and the spline tooth 24 cooperate more conveniently, and one end of the spline tooth 24 can move to the outside of the spline groove 114 and connect with the first transmission member 20 or the second transmission member 30.

[0071] In one embodiment, a limit strip 25 is provided on the inner wall surface of the sleeve 2, and the ends of the limit strip 25 can abut against the first transmission member 20 and the second transmission member 30. Specifically, the length direction of the limit strip 25 is arranged along the axial direction of the sleeve 2, and the length of the limit strip 25 is less than the length of the spline teeth 24. When the spline teeth 24 are connected to the first transmission member 20, the limit strip 25 abuts against the side of the first transmission member 20 to prevent the sleeve 2 from moving further. Similarly, when the spline teeth 24 are connected to the second transmission member 30, the limit strip 25 abuts against the side of the second transmission member 30 to prevent the sleeve 2 from moving further. In other words, a travel range of the limit strip 25 when moving is formed between the first transmission member 20 and the second transmission member 30, thereby limiting the axial movement travel of the sleeve 2.

[0072] See also Figure 1 , Figure 2 , Figure 3 and Figure 8 , the excitation component 3 includes a coil, and the current of the coil is 2A-2.5A. Among them, the present application increases the current of the coil to 2A-2.5A to increase the magnetic field strength of the excitation component, thereby increasing the magnetic attraction between the excitation component and the sleeve 2, and avoiding insufficient magnetic attraction due to magnetic leakage. In a preferred embodiment, the current of the coil is 2.2A-2.5A.

[0073] The coil includes a first coil 312 and a second coil 322. The first coil 312 is arranged outside the first end of the sleeve 2, and can be electromagnetically induced with the sleeve 2 to drive the sleeve 2 to move in a first direction. The first direction refers to a direction along the axial direction of the sleeve 2 and toward one side of the first transmission member 20. That is, when the sleeve 2 moves in the first direction, the sleeve 2 moves in a direction close to the first transmission member 20, so that the sleeve 2 can be connected to the first transmission member 20. Similarly, the second coil 322 is arranged outside the second end of the sleeve 2, and can be electromagnetically induced with the sleeve 2 to drive the sleeve 2 to move in a second direction. The first direction is opposite to the second direction. That is, when the sleeve 2 moves in the second direction, the sleeve 2 moves in a direction close to the second transmission member 30, so that the sleeve 2 can be connected to the second transmission member 30.

[0074] In detail, the excitation member 3 further includes a first housing 311 and a first end cover 313. The first housing 311 is arranged on the circumferential outer side of the first end of the sleeve 2. The first housing 311 is provided with a first coil mounting groove 314 on one axial end face. The first coil 312 is fixed in the first coil mounting groove 314. The first end cover 313 is fixed on the first housing 311 and abuts against the first coil 312. The first housing 311, the first coil 312 and the first end cover 313 form a first coil assembly 31. Among them, the inner diameter of the first end cover 313 is smaller than the outer diameter of the first end of the sleeve 2, and there is a first gap 315 between the first end of the sleeve 2 and the first end cover 313. The first gap 315 forms a moving space for the sleeve 2 in the first direction, that is, a moving space when moving from "neutral gear" to "first gear", and enables the sleeve 2 to be attracted toward the first end cover 313 under the action of the magnetic field of the first coil assembly 31 after the first coil 312 is powered on.

[0075] Similarly, the excitation member 3 further includes a second housing 321 and a second end cover 323. The second housing 321 is arranged on the circumferential outer side of the second end of the sleeve 2. The second housing 321 is provided with a second coil mounting groove on one axial end face. The second coil 322 is fixed in the second coil mounting groove. The second end cover 323 is fixed on the second housing 321 and abuts against the second coil 322. The second housing 321, the second coil 322 and the second end cover 323 form a second coil assembly 32. The inner diameter of the second end cover 323 is smaller than the outer diameter of the second end of the sleeve 2, and a second gap 324 is provided between the second end of the sleeve 2 and the second end cover 323. The second housing 321 is fixedly connected to the first housing 311, and the first end cover 313 is provided at one end of the first housing 311 away from the second housing 321, and the second end cover 323 is provided at one end of the second housing 321 away from the first housing 311. The second gap 324 forms a moving space for the sleeve 2, that is, a moving space when moving from "neutral gear" to "second gear", and enables the sleeve 2 to be attracted toward the second end cover 323 under the action of the magnetic field of the second coil assembly 32 after the second coil 322 is powered on.

[0076] In the above, by the setting of the first coil assembly 31 and the second coil assembly 32, and when the first coil assembly 31 is powered on, the sleeve 2 is controlled to move to the "first gear" position, and when the second coil assembly 32 is powered on, the sleeve 2 is controlled to move to the "second gear" position. Therefore, by powering on the first coil assembly 31 and the second coil assembly 32 respectively, the electromagnetic clutch 10 can be switched between the "first gear" and the "second gear", and the control is convenient.

[0077] In one embodiment, the first coil assembly 31 and the second coil assembly 32 have the same structure, and the first coil assembly 31 and the second coil assembly 32 are symmetrically arranged, so that the structure of the excitation component 3 is more compact and convenient to manufacture.

[0078] That is to say, the excitation component 3 includes an outer shell, a coil and an end cover. The outer shell is sleeved on the outer side of the sleeve 2. A coil mounting groove is provided on the outer shell. The coil is fixed in the coil mounting groove. The end cover is fixed on the outer shell and is located at the axial end of the outer shell. The inner diameter of the end cover is smaller than the outer diameter of the sleeve 2, and there is a gap between the end of the sleeve 2 and the end cover, so that when the coil is energized, the magnetic field formed can attract the sleeve 2, and the sleeve 2 has a movable space, so that the sleeve 2 can move between the "first gear" and the "second gear".

[0079] The shell is divided into a first shell 311 and a second shell 321 in the axial direction. The first shell 311 is provided with a first coil installation groove 314, and the second shell 321 is provided with a second coil installation groove. The first shell 311 and the second shell 321 are arranged back to back and fixed together. The first coil installation groove 314 and the second coil installation groove are both annular. The coil includes a first coil 312 and a second coil 322. The first coil 312 is fixed in the first coil installation groove 314. When the first coil 312 is powered on, the drive sleeve 2 moves in the "first gear" direction. The second coil 322 is fixed in the second coil installation groove. When the second coil 322 is powered on, the drive sleeve 2 moves in the "second gear" direction. This makes it convenient to control the movement direction of the sleeve 2, that is, to conveniently control the gear switching.

[0080] The end cap includes a first end cap 313 and a second end cap 323. The first end cap 313 is fixed to the first end portion of the housing, so that the first housing 311, the first coil 312 and the first end cap 313 form a first coil assembly 31 for driving the sleeve 2 to move in the direction of the first transmission member 20. The second end cap 323 is fixed to the second end portion of the housing, so that the second housing 321, the second coil 322 and the second end cap 323 form a second coil assembly 32 for driving the sleeve 2 to move in the direction of the second transmission member 30.

[0081] In other embodiments, the coil is configured as one, and the movement direction of the sleeve 2 is changed by changing the current direction of the coil.

[0082] Embodiment 2:

[0083] See also Figure 2 , the power device includes an electromagnetic clutch assembly 100, and the electromagnetic clutch assembly 100 includes a connecting member 1, a sleeve 2, an excitation member 3, a first transmission member 20 and a second transmission member 30. The connecting member 1, the sleeve 2, the excitation member 3, the first transmission member 20 and the second transmission member 30 are coaxially arranged, and the first transmission member 20 and the second transmission member 30 are respectively arranged on both sides of the sleeve 2 along the axial direction. The difference between the second embodiment and the first embodiment is that the electromagnetic clutch assembly 100 includes the first transmission member 20 and the second transmission member 30 and the electromagnetic clutch 10 in the first embodiment, that is, the first transmission member 20 and the second transmission member 30 of the power device in the first embodiment are part of the electromagnetic clutch assembly 100. Among them, the connection between the connecting member 1, the sleeve 2, the excitation member 3, the first transmission member 20 and the second transmission member 30 is the same as that in the first embodiment, and will not be repeated here.

[0084] See also Figure 3In the above-mentioned embodiments 1 and 2, the electromagnetic clutch 10 also includes a main shaft 40, which is fixedly connected to the connecting member 1, and the first transmission member 20 and the second transmission member 30 are rotatably connected to the main shaft 40, so that the relative positions among the main shaft 40, the connecting member 1, the first transmission member 20 and the second transmission member 30 are fixed, and the connecting member 1 can be connected to other power transmission structures through the main shaft 40.

[0085] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. An electromagnetic clutch, characterized in that: include: Connectors; A sliding sleeve is slidably connected to the circumferential outer side of the connecting member and can move axially relative to the connecting member. Both axial ends of the sliding sleeve are provided with a clamping structure. The clamping structures located at both ends of the sliding sleeve can be connected to different transmission members respectively. The sliding sleeve is an integrated structure; The excitation component is arranged on the circumferential outer side of the sliding sleeve and can generate electromagnetic induction with the sliding sleeve and drive the sliding sleeve to move axially, so that the sliding sleeve is connected to different transmission components.

2. The electromagnetic clutch according to claim 1, characterized in that: The electromagnetic clutch also includes: A reset elastic member is arranged along the axial direction of the connecting member, and one end of the reset elastic member cooperates with the connecting member, and the other end cooperates with the sliding sleeve, so as to drive the sliding sleeve to separate from the transmission member.

3. The electromagnetic clutch according to claim 2, characterized in that: A positioning groove is provided on the inner wall surface of the sliding sleeve; The electromagnetic clutch also includes: The auxiliary return elastic member is arranged on the connecting member and abuts against the inner wall surface of the sliding sleeve. When the sliding sleeve is separated from the transmission member, the auxiliary return elastic member is engaged in the positioning groove.

4. The electromagnetic clutch according to claim 3, characterized in that: The connecting member comprises a gear hub, a circumferential outer surface of the gear hub is provided with a spring installation groove, and the spring installation groove is arranged along the radial direction of the gear hub; The auxiliary return elastic member comprises a first spring and a ball, wherein the first spring is arranged in the spring installation groove, the ball is located between the first spring and the sliding sleeve, and the ball abuts against the sliding sleeve.

5. The electromagnetic clutch according to claim 4, characterized in that: The connecting member further comprises a pressing plate, wherein two pressing plates are provided and the two pressing plates are respectively fixed at two ends of the axial direction of the gear hub; A protrusion is provided on the inner wall surface of the sliding sleeve, and the protrusion is located between the two pressing plates. The resetting elastic member is elastically connected between the protrusion and the two pressing plates.

6. The electromagnetic clutch according to claim 5, characterized in that: The gear hub is provided with a pressure plate mounting groove and an avoidance groove at both ends of the axial direction, the diameter of the pressure plate mounting groove is smaller than the diameter of the gear hub, one end of the avoidance groove is connected to the pressure plate mounting groove, and the other end is connected to the circumferential outer surface of the gear hub; The pressure plate includes a fixing ring and a connecting protrusion, wherein the fixing ring is interference-connected in the pressure plate mounting groove, one end of the connecting protrusion is connected to the circumferential outer side of the fixing ring, and the other end passes through the avoidance groove and extends to the circumferential outer side of the gear hub; One end of the resetting elastic member away from the protruding portion abuts against the connecting protrusion.

7. The electromagnetic clutch according to claim 6, characterized in that: A reset elastic member installation groove is provided on the circumferential outer surface of the gear hub, the reset elastic member installation groove is connected to the avoidance grooves at both ends of the gear hub, and the reset elastic member and the protrusion are located in the reset elastic member installation groove; A spline groove is provided on the circumferential outer surface of the gear hub, the length direction of the spline groove is arranged along the axial direction of the gear hub, and a spline tooth is provided on the inner wall surface of the sliding sleeve, and the spline tooth is slidably matched with the spline groove; The spline groove, the connecting protrusion and the auxiliary return elastic member are all arranged in plurality along the circumferential direction of the gear hub at intervals; any two of the spline groove, the connecting protrusion and the auxiliary return elastic member are arranged in a staggered manner.

8. The electromagnetic clutch according to claim 7, characterized in that: The spline groove is in communication with both axial end surfaces of the gear hub; The fixing structure includes a first locking tooth and a second locking tooth. The first locking tooth is arranged at the first end of the sliding sleeve and can cooperate with the transmission member close to the first end of the sliding sleeve; the second locking tooth is arranged at the second end of the sliding sleeve and can cooperate with the transmission member close to the second end of the sliding sleeve. The first locking tooth and the second locking tooth are arranged on the same straight line as the spline tooth.

9. The electromagnetic clutch according to claim 1, characterized in that: The excitation component includes a coil, and the current of the coil is 2A-2.5A.

10. The electromagnetic clutch according to claim 9, characterized in that: The current of the coil is 2.2A-2.5A.

11. The electromagnetic clutch according to claim 9 or 10, characterized in that: The coil includes a first coil and a second coil, the first coil is arranged outside the first end of the sleeve, and can electromagnetically induce the sleeve to drive the sleeve to move in a first direction, the second coil is arranged outside the second end of the sleeve, and can electromagnetically induce the sleeve to drive the sleeve to move in a second direction, and the first direction is opposite to the second direction.

12. The electromagnetic clutch according to claim 11, characterized in that: The first coil and the second coil are symmetrically arranged; The excitation component further includes a first shell, a first end cover, a second shell and a second end cover, the first shell is arranged outside the first end of the sliding sleeve, a first coil installation groove is opened on an axial end surface of the first shell, the first coil is fixed in the first coil installation groove, the first end cover is fixed on the first shell and abuts against the first coil, the inner diameter of the first end cover is smaller than the outer diameter of the first end of the sliding sleeve, and a first gap is provided between the first end of the sliding sleeve and the first end cover; The first housing is arranged outside the first end of the sliding sleeve, the second housing is provided with a second coil installation groove on one axial end surface, the second coil is fixed in the second coil installation groove, the second end cover is fixed on the second housing and abuts against the second coil, the inner diameter of the second end cover is smaller than the outer diameter of the second end of the sliding sleeve, and a second gap is provided between the second end of the sliding sleeve and the second end cover; The first shell is fixedly connected to the second shell, and the first end cover is disposed at one end of the first shell facing away from the second shell, and the second end cover is disposed at one end of the second shell facing away from the first shell.

13. The electromagnetic clutch according to claim 1, characterized in that: The sliding sleeve is a steel part or an iron part.

14. An electromagnetic clutch assembly, characterized in that: include: The electromagnetic clutch according to any one of claims 1 to 13; A first transmission member is arranged on one side of the axial direction of the connecting member, and a first connecting structure is provided on the first transmission member, and the fixing structure can be engaged with the first connecting structure; The second transmission member is arranged on a side of the connecting member away from the first transmission member. The first transmission member is provided with a second connecting structure, and the fixing structure can be engaged with the second connecting structure.

15. The electromagnetic clutch assembly according to claim 14, characterized in that: The first connection structure and the second connection structure are both card slots.

16. The electromagnetic clutch assembly according to claim 14, characterized in that: A limiting strip is provided on the inner wall surface of the sliding sleeve, a first end of the limiting strip can abut against the first transmission member, and a second end of the limiting strip can abut against the second transmission member.

17. The electromagnetic clutch assembly according to claim 14, characterized in that: Also includes: The main shaft is fixedly connected to the connecting member, and the first transmission member and the second transmission member are both rotatably connected to the main shaft.

18. A power device, characterized in that: It includes an electromagnetic clutch assembly as described in any one of claims 14 to 17, wherein the electromagnetic clutch assembly can drive the sleeve to be connected to the first transmission member through the fixing structure, or the electromagnetic clutch assembly can drive the sleeve to be connected to the second transmission shaft through the fixing structure, and the transmission ratio between the first transmission member and the sleeve is different from the transmission ratio between the second transmission member and the sleeve.

19. A vehicle, characterized in that: It comprises a vehicle body, wheels and a power device as claimed in claim 18, wherein the power device is fixedly connected to the vehicle body, and the wheels are transmission-connected to the power device.

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