Jaw type electromagnetic clutch

Abstract

The utility model discloses a jaw electromagnetic clutch which comprises a first gear, a second gear, an intermediate shaft, a first gear ring, a second gear ring, a first elastic piece, a second elastic piece, a first electromagnetic component and a second electromagnetic component. Wherein the first gear is rotationally connected to the intermediate shaft and used for being in transmission connection with an engine so that power output by the engine can be connected, and the second gear is rotationally connected to the intermediate shaft and used for being in transmission connection with a driving motor so that power output by the driving motor can be connected. The first gear ring can axially slide relative to the middle shaft and is connected to the middle shaft in the circumferential direction and cannot rotate relative to the middle shaft, the second gear ring can axially slide relative to the middle shaft and is connected to the middle shaft in the circumferential direction and cannot rotate relative to the middle shaft, and first end face combination teeth are arranged on the first gear ring. The power source of the vehicle can be switched, and the driving mode of the vehicle can be switched.

Description

Technical Field

[0001] The utility model relates to a tooth-type electromagnetic clutch. Background Art

[0002] At present, the tooth-type electromagnetic clutch has the advantages of high transmission efficiency, low heat generation and high reliability, and is widely used in hybrid vehicles. For example, a tooth-type electromagnetic clutch is disclosed in the Chinese patent publication number CN202091401U. However, most of the existing tooth-type electromagnetic clutches can only simply control the transmission and interruption of power, and cannot be used to switch the power source of the vehicle, that is, they cannot be used to switch the driving mode of the vehicle. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a tooth-type electromagnetic clutch which can be used for switching the power source of a vehicle and can be used for switching the driving mode of the vehicle.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a tooth-type electromagnetic clutch, which includes a first gear, a second gear, an intermediate shaft, a first gear ring, a second gear ring, a first elastic member, a second elastic member, a first electromagnetic component and a second electromagnetic component;

[0005] The first gear is rotatably connected to the intermediate shaft and is used for transmission connection with the engine so as to receive the power output by the engine;

[0006] The second gear is rotatably connected to the intermediate shaft and is used for transmission connection with the drive motor so as to receive the power output by the drive motor;

[0007] The first gear ring is connected to the intermediate shaft so as to be axially slidable relative to the intermediate shaft and circumferentially non-rotatable relative to the intermediate shaft;

[0008] The second gear ring is connected to the intermediate shaft so as to be slidable in the axial direction relative to the intermediate shaft and not rotatable in the circumferential direction relative to the intermediate shaft;

[0009] The first gear ring is provided with first end surface combined teeth, and the second gear ring is provided with second end surface combined teeth;

[0010] The first gear is provided with a first end surface matching tooth, and the second gear is provided with a second end surface matching tooth;

[0011] The first end surface engaging teeth are arranged opposite to the first end surface matching teeth, and the second end surface engaging teeth are arranged opposite to the second end surface matching teeth;

[0012] The first elastic member abuts against the first gear ring and is used to drive the first gear ring to move away from the first end surface matching tooth when the first electromagnetic component is powered off so as to separate the first end surface engaging tooth from the first end surface matching tooth;

[0013] The second elastic member abuts against the second gear ring and is used to drive the second gear ring to move away from the second end surface matching teeth when the second electromagnetic component is powered off so as to separate the second end surface engaging teeth from the second end surface matching teeth;

[0014] The first electromagnetic component is used for generating a magnetic force to attract the first gear ring to move toward the first end surface matching tooth when powered on so that the first end surface coupling tooth is engaged and connected with the first end surface matching tooth;

[0015] The second electromagnetic component is used for generating a magnetic force to attract the second gear ring to move toward the second end surface matching tooth when powered on so that the second end surface coupling tooth is engaged and connected with the second end surface matching tooth.

[0016] Furthermore, the first gear ring is slidably sleeved on the intermediate shaft via a spline, and the second gear ring is slidably sleeved on the intermediate shaft via a spline.

[0017] Further, the first gear ring and the second gear ring are both located between the first gear and the second gear, and the first gear, the first gear ring, the second gear ring and the second gear are sequentially arranged along the axial direction of the intermediate shaft.

[0018] Further, the intermediate shaft is provided with a shaft shoulder located between the first gear ring and the second gear ring;

[0019] The intermediate shaft is also connected with a first retaining ring and a second retaining ring;

[0020] The first elastic member is disposed between the first gear ring and the first retaining ring, one end of the first elastic member abuts against the first retaining ring, and the other end of the first elastic member abuts against the first gear ring, and the first elastic member is used to drive the first gear ring to move away from the first end surface matching tooth to abut against the shaft shoulder and separate the first end surface combining tooth from the first end surface matching tooth when the first electromagnetic component is powered off;

[0021] The second elastic member is arranged between the second gear ring and the second retaining ring, one end of the second elastic member is against the second retaining ring, and the other end of the second elastic member is against the second gear ring. The second elastic member is used to drive the second gear ring to move away from the second end face matching tooth to abut against the shaft shoulder and separate the second end face combining tooth from the second end face matching tooth when the second electromagnetic component is powered off.

[0022] Further, the first electromagnetic component is disposed around the outside of the first gear ring, and the second electromagnetic component is disposed around the outside of the second gear ring;

[0023] Wherein, the first electromagnetic component includes a first electromagnetic coil and a first magnetized portion, and the first electromagnetic coil and the first magnetized portion are both located outside the first gear ring;

[0024] A first armature portion is disposed on the first gear ring, and a first gap is disposed between the first armature portion and the first magnetized portion;

[0025] The first electromagnetic coil is used to generate magnetic flux lines passing through the first magnetized portion and the first armature portion after being energized, so that the first magnetized portion attracts the first armature portion and drives the first gear ring to move toward the first end surface matching tooth;

[0026] Wherein, the second electromagnetic component comprises a second electromagnetic coil and a second magnetized portion, and the second electromagnetic coil and the second magnetized portion are both located outside the second gear ring;

[0027] The second gear ring is provided with a second armature portion, and a second gap is provided between the second armature portion and the second magnetized portion;

[0028] The second electromagnetic coil is used to generate magnetic flux lines passing through the second magnetized portion and the second armature portion after being energized, so that the second magnetized portion attracts the second armature portion and then drives the second gear ring to move toward the second end surface matching tooth.

[0029] Further, the first armature portion is provided with a first inner bevel portion facing the first gear, the first magnetized portion is provided with a first outer bevel portion arranged opposite to the first inner bevel portion, the first gap is provided between the first inner bevel portion and the first outer bevel portion, and the magnetic flux generated by the first electromagnetic coil after being energized passes through the first outer bevel portion and the first inner bevel portion;

[0030] The second armature portion is provided with a second inner inclined portion facing the second gear, the second magnetized portion is provided with a second outer inclined portion arranged opposite to the second inner inclined portion, the second gap is arranged between the second inner inclined portion and the second outer inclined portion, and the magnetic lines of force generated by the second electromagnetic coil after being energized pass through the second inner inclined portion and the second outer inclined portion.

[0031] The utility model also provides another tooth-type electromagnetic clutch, which includes a first gear, a second gear, an intermediate shaft, a first gear ring, a second gear ring, a first elastic member, a second elastic member, a first electromagnetic component and a second electromagnetic component;

[0032] The first gear is rotatably connected to the intermediate shaft and is used for transmission connection with the engine so as to receive the power output by the engine;

[0033] The second gear is rotatably connected to the intermediate shaft and is used for transmission connection with the drive motor so as to receive the power output by the drive motor;

[0034] The first gear ring is axially slidable relative to the first gear and circumferentially non-rotatably connected to the first gear;

[0035] The second gear ring is axially slidable relative to the second gear and circumferentially non-rotatably connected to the second gear;

[0036] The first gear ring is provided with first end surface combined teeth, and the second gear ring is provided with second end surface combined teeth;

[0037] The intermediate shaft is provided with a first end surface matching tooth and a second end surface matching tooth;

[0038] The first end surface engaging teeth are arranged opposite to the first end surface matching teeth, and the second end surface engaging teeth are arranged opposite to the second end surface matching teeth;

[0039] The first elastic member abuts against the first gear ring and is used to drive the first gear ring to move away from the first end surface matching tooth when the first electromagnetic component is powered off so as to separate the first end surface engaging tooth from the first end surface matching tooth;

[0040] The second elastic member abuts against the second gear ring and is used to drive the second gear ring to move away from the second end surface matching teeth when the second electromagnetic component is powered off so as to separate the second end surface engaging teeth from the second end surface matching teeth;

[0041] The first electromagnetic component is used for generating a magnetic force to attract the first gear ring to move toward the first end surface matching tooth when powered on so that the first end surface coupling tooth is engaged and connected with the first end surface matching tooth;

[0042] The second electromagnetic component is used for generating a magnetic force to attract the second gear ring to move toward the second end surface matching tooth when powered on so that the second end surface coupling tooth is engaged and connected with the second end surface matching tooth.

[0043] Furthermore, a first mounting sleeve is provided on the first gear, and the first gear ring is slidably sleeved on the first mounting sleeve via a spline;

[0044] The second gear is provided with a second mounting sleeve, and the second gear ring is slidably sleeved on the second mounting sleeve via a spline;

[0045] The first gear ring and the second gear ring are both located between the first gear and the second gear;

[0046] The intermediate shaft is provided with a shaft shoulder located between the first gear ring and the second gear ring;

[0047] The first end surface combined tooth is provided on an end portion of the first gear ring facing the shaft shoulder, and the second end surface combined tooth is provided on an end portion of the second gear ring facing the shaft shoulder;

[0048] The first end surface matching teeth are arranged on an end portion of the shaft shoulder facing the first gear ring, and the second end surface matching teeth are arranged on an end portion of the shaft shoulder facing the second gear ring.

[0049] Further, the first mounting sleeve is connected to a first retaining ring;

[0050] The first elastic member is disposed between the first gear ring and the first retaining ring, one end of the first elastic member abuts against the first retaining ring, and the other end of the first elastic member abuts against the first gear ring, and the first elastic member is used to drive the first gear ring to move away from the first end face matching tooth when the first electromagnetic component is powered off, thereby separating the first end face combining tooth from the first end face matching tooth;

[0051] The second mounting sleeve is connected to a second retaining ring;

[0052] The second elastic member is arranged between the second gear ring and the second retaining ring, one end of the second elastic member is against the second retaining ring, and the other end of the second elastic member is against the second gear ring. The second elastic member is used to drive the second gear ring to move away from the second end face mating tooth when the second electromagnetic component is powered off, thereby separating the second end face combining tooth from the second end face mating tooth.

[0053] Further, the first electromagnetic component includes a first electromagnetic coil, and the second electromagnetic component includes a second electromagnetic coil;

[0054] The first gear ring is provided with a first armature part, and the second gear ring is provided with a second armature part;

[0055] The first electromagnetic coil and the second electromagnetic coil are both located between the first armature part and the second armature part and are both located outside the shaft shoulder;

[0056] The first electromagnetic coil is used to attract the first armature part when energized, thereby driving the first gear ring to move toward the first end surface matching tooth so that the first end surface coupling tooth is engaged and connected with the first end surface matching tooth;

[0057] The second electromagnetic coil is used to attract the second armature part when energized, thereby driving the second gear ring to move toward the second end surface matching tooth so that the second end surface coupling tooth is engaged and connected with the second end surface matching tooth.

[0058] After adopting the above technical solution, during driving, when the vehicle speed is low, it can be switched to pure electric mode. At this time, the first electromagnetic component is powered off and the second electromagnetic component is powered on. The first gear ring moves away from the first end face matching tooth under the drive of the first elastic member to separate the first end face combination tooth from the first end face matching tooth, so that the power of the engine cannot be transmitted to the intermediate shaft; the second electromagnetic component is powered on to generate magnetic force and attract the second gear ring to move toward the second end face matching tooth so that the second end face combination tooth and the second end face matching tooth are engaged and connected. At this time, the power of the drive motor can be transmitted to the second gear, the second gear ring and the intermediate shaft in sequence, so the drive motor drives the intermediate shaft to rotate alone. When the vehicle speed is fast, it can enter the parallel mode. At this time, both the first electromagnetic component and the second electromagnetic component are powered on. The first electromagnetic component is powered on to generate magnetic force and attract the first gear ring to move toward the first end face matching tooth so that the first end face combination tooth and the first end face matching tooth are engaged and connected. The second electromagnetic component is powered on to generate magnetic force and attract the second gear ring to move toward the second end face matching tooth so that the second end face combination tooth and the second end face matching tooth are engaged and connected. At this time, the power of the engine can be transmitted to the first gear, the first gear ring and the intermediate shaft in sequence, and the power of the drive motor can be transmitted to the second gear, the second gear ring and the intermediate shaft in sequence, and the engine and the drive motor jointly drive the intermediate shaft to rotate. When the vehicle speed is faster, the engine direct drive mode can be entered, at which time the first electromagnetic component is energized and the second electromagnetic component is de-energized, the first electromagnetic component is energized to generate magnetic force and attract the first gear ring to move toward the first end surface matching tooth so that the first end surface combination tooth and the first end surface matching tooth are engaged and connected, and the second gear ring is driven by the second elastic member to move away from the second end surface matching tooth so that the second end surface combination tooth and the second end surface matching tooth are separated, so that the power of the drive motor cannot be transmitted to the intermediate shaft, and the power of the engine can be transmitted to the first gear, the first gear ring and the intermediate shaft in sequence, so the engine alone drives the intermediate shaft to rotate. It can be seen that the tooth-type electromagnetic clutch of the embodiment of the present application can not only control the transmission and interruption of the engine power, but also control the transmission and interruption of the drive motor power, so it can be used to switch the power source of the vehicle and the drive mode of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a structural schematic diagram of the tooth-type electromagnetic clutch in the first embodiment of the utility model;

[0060] Figure 2 It is a cross-sectional view of the tooth-type electromagnetic clutch in the first embodiment of the utility model;

[0061] Figure 3 for Figure 2 Detailed drawings of the parts;

[0062] Figure 4 It is an exploded view of the assembly of the tooth-type electromagnetic clutch in the first embodiment of the utility model;

[0063] Figure 5 It is a structural schematic diagram of a tooth-type electromagnetic clutch in the second embodiment of the utility model;

[0064] Figure 6 It is a cross-sectional view of the tooth-type electromagnetic clutch in the second embodiment of the utility model;

[0065] Figure 7 for Figure 6 Detailed drawings of parts;

[0066] Figure 8 It is an exploded view of the assembly of the tooth-type electromagnetic clutch in the second embodiment of the present utility model. DETAILED DESCRIPTION

[0067] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0068] Embodiment 1

[0069] like Figures 1 to 4 As shown, a tooth-type electromagnetic clutch comprises a first gear 1, a second gear 2, an intermediate shaft 3, a first ring gear 4, a second ring gear 5, a first elastic member 6, a second elastic member 7, a first electromagnetic component 8 and a second electromagnetic component 9;

[0070] The first gear 1 is rotatably connected to the intermediate shaft 3 and is used for transmission connection with the engine so as to receive the power output by the engine;

[0071] The second gear 2 is rotatably connected to the intermediate shaft 3 and is used for transmission connection with the drive motor so as to receive the power output by the drive motor;

[0072] The first gear ring 4 is connected to the intermediate shaft 3 so as to be slidable in the axial direction relative to the intermediate shaft 3 and not rotatable in the circumferential direction relative to the intermediate shaft 3;

[0073] The second gear ring 5 is connected to the intermediate shaft 3 so as to be slidable in the axial direction relative to the intermediate shaft 3 and not rotatable in the circumferential direction relative to the intermediate shaft 3;

[0074] The first gear ring 4 is provided with a first end surface coupling tooth 10, and the second gear ring 5 is provided with a second end surface coupling tooth 11;

[0075] The first gear 1 is provided with a first end surface matching tooth 12, and the second gear 2 is provided with a second end surface matching tooth 13;

[0076] The first end surface combining tooth 10 is disposed opposite to the first end surface matching tooth 12, and the second end surface combining tooth 11 is disposed opposite to the second end surface matching tooth 13;

[0077] The first elastic member 6 abuts against the first gear ring 4 and is used to drive the first gear ring 4 to move away from the first end surface matching tooth 12 when the first electromagnetic component 8 is powered off so as to separate the first end surface engaging tooth 10 from the first end surface matching tooth 12;

[0078] The second elastic member 7 abuts against the second gear ring 5 and is used to drive the second gear ring 5 to move away from the second end surface matching teeth 13 when the second electromagnetic component 9 is powered off so as to separate the second end surface coupling teeth 11 from the second end surface matching teeth 13;

[0079] The first electromagnetic component 8 is used to generate a magnetic force to attract the first gear ring 4 to move toward the first end surface matching tooth 12 when powered on so that the first end surface coupling tooth 10 is engaged and connected with the first end surface matching tooth 12;

[0080] The second electromagnetic component 9 is used for generating a magnetic force to attract the second gear ring 5 to move toward the second end surface matching teeth 13 when powered on so that the second end surface coupling teeth 11 are engaged with the second end surface matching teeth 13 .

[0081] Specifically, when the first end surface combined teeth 10 and the first end surface matching teeth 12 are engaged and connected, the first gear 1 can drive the first gear ring 4 to rotate at the same speed, and when the first end surface combined teeth 10 and the first end surface matching teeth 12 are separated, the power transmission between the first gear 1 and the first gear ring 4 is interrupted. Similarly, when the second end surface combined teeth 11 and the second end surface matching teeth 13 are engaged and connected, the second gear 2 can drive the second gear ring 5 to rotate at the same speed, and when the second end surface combined teeth 11 and the second end surface matching teeth 13 are separated, the power transmission between the second gear 2 and the second gear ring 5 is interrupted. In the axial direction, the first gear ring 4 can slide freely on the intermediate shaft 3, and in the circumferential direction, the first gear ring 4 always keeps the same speed rotation or stops synchronously with the intermediate shaft 3; in the axial direction, the second gear ring 5 can slide freely on the intermediate shaft 3, and in the circumferential direction, the second gear ring 5 always keeps the same speed rotation or stops synchronously with the intermediate shaft 3.

[0082] Therefore, during driving, when the vehicle speed is low, it can be switched to pure electric mode. At this time, the first electromagnetic component 8 is powered on and the second electromagnetic component 9 is powered on. The first ring gear 4 moves to the right away from the first end face matching tooth 12 under the drive of the first elastic member 6 to separate the first end face combining tooth 10 from the first end face matching tooth 12, so that the power of the engine cannot be transmitted to the intermediate shaft 3; the second electromagnetic component 9 is powered on to generate magnetic force and attract the second ring gear 5 to move to the right toward the second end face matching tooth 13 so that the second end face combining tooth 11 is engaged with the second end face matching tooth 13. At this time, the power of the drive motor can be transmitted to the second gear 2, the second ring gear 5 and the intermediate shaft 3 in sequence, so the drive motor drives the intermediate shaft 3 to rotate alone. When the vehicle speed is high, the parallel mode can be entered. At this time, the first electromagnetic component 8 and the second electromagnetic component 9 are both energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move leftward toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12, and the second electromagnetic component 9 is energized to generate magnetic force and attract the second gear ring 5 to move rightward toward the second end surface matching tooth 13 so that the second end surface combination tooth 11 is engaged with the second end surface matching tooth 13. At this time, the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, and the power of the drive motor can be transmitted to the second gear 2, the second gear ring 5 and the intermediate shaft 3 in sequence. The engine and the drive motor jointly drive the intermediate shaft 3 to rotate. When the vehicle speed is faster, the engine direct drive mode can be entered. At this time, the first electromagnetic component 8 is energized and the second electromagnetic component 9 is de-energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move leftward toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12. The second gear ring 5 is driven by the second elastic member 7 to move leftward away from the second end surface matching tooth 13 so that the second end surface combination tooth 11 is separated from the second end surface matching tooth, so that the power of the drive motor cannot be transmitted to the intermediate shaft 3, and the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, so the engine alone drives the intermediate shaft 3 to rotate. It can be seen that the tooth-type electromagnetic clutch of the embodiment of the present application can not only control the transmission and interruption of the engine power, but also control the transmission and interruption of the drive motor power, so it can be used to switch the power source of the vehicle and the drive mode of the vehicle.

[0083] like Figures 1 to 4As shown, the first gear ring 4 is slidably sleeved on the intermediate shaft 3 through a spline, and the second gear ring 5 is slidably sleeved on the intermediate shaft 3 through a spline, so that the first gear ring 4 and the second gear ring 5 can slide relative to the intermediate shaft 3 in the axial direction but cannot rotate relative to the intermediate shaft 3 in the circumferential direction. In this embodiment, the first gear ring 4 is provided with a first internal spline 14, the second gear ring 5 is provided with a second internal spline 15, and the intermediate shaft 3 is provided with a first external spline 16 and a second external spline 17, the first internal spline 14 is slidably sleeved on the first external spline 16 with clearance fit, and the second internal spline 15 is slidably sleeved on the second external spline 17 with clearance fit. Of course, in some embodiments, the first gear ring 4 and the second gear ring 5 can also be slidably sleeved on the intermediate shaft 3 through a flat key.

[0084] like Figures 1 to 4 As shown, the first gear ring 4 and the second gear ring 5 are both located between the first gear 1 and the second gear 2, and the first gear 1, the first gear ring 4, the second gear ring 5 and the second gear 2 are sequentially arranged along the axial direction of the intermediate shaft 3; in this embodiment, the first gear 1 and the second gear 2 can be rotatably connected to the intermediate shaft 3 via needle bearings respectively.

[0085] like Figures 1 to 4 As shown, the intermediate shaft 3 is provided with a shaft shoulder 18 located between the first gear ring 4 and the second gear ring 5;

[0086] The intermediate shaft 3 is also connected to a first retaining ring 19 and a second retaining ring 20;

[0087] The first elastic member 6 is disposed between the first gear ring 4 and the first retaining ring 19, one end of the first elastic member 6 abuts against the first retaining ring 19, and the other end of the first elastic member 6 abuts against the first gear ring 4. The first elastic member 6 is used to drive the first gear ring 4 to move away from the first end surface matching tooth 12 to abut against the shaft shoulder 18 and separate the first end surface combining tooth 10 from the first end surface matching tooth 12 when the first electromagnetic component 8 is powered off;

[0088] The second elastic member 7 is arranged between the second gear ring 5 and the second retaining ring 20, one end of the second elastic member 7 is against the second retaining ring 20, and the other end of the second elastic member 7 is against the second gear ring 5. The second elastic member 7 is used to drive the second gear ring 5 to move away from the second end face matching tooth 13 to abut against the shaft shoulder 18 and separate the second end face combining tooth 11 from the second end face matching tooth 13 when the second electromagnetic component 9 is powered off.

[0089] In this embodiment, the first retaining ring 19 can be installed and connected to the intermediate shaft 3 through a retaining spring, and the first retaining ring 19 is located on the inner side of the first end surface matching tooth 12. The second retaining ring 20 can also be installed and connected to the intermediate shaft 3 through a retaining spring, and the second retaining ring 20 is located on the inner side of the second end surface matching tooth 13. In addition, the first retaining ring 19 is located between the first gear 1 and the first gear ring 4 in the axial direction, and the second retaining ring 20 is located between the second gear 2 and the second gear ring 5. Specifically, the first elastic member 6 and the second elastic member 7 are both sleeved on the outer side of the intermediate shaft 3, and the first elastic member 6 and the second elastic member 7 can both be springs.

[0090] like Figures 1 to 4 As shown, the first electromagnetic component 8 is arranged around the outside of the first gear ring 4, and the second electromagnetic component 9 is arranged around the outside of the second gear ring 5. This arrangement can save space to the extreme, shorten the overall axial length, make the space more compact, reduce the overall volume, and make the structure more compact.

[0091] The first electromagnetic component 8 includes a first electromagnetic coil 21 and a first magnetized portion 22, and the first electromagnetic coil 21 and the first magnetized portion 22 are both located outside the first gear ring 4;

[0092] A first armature portion 23 is disposed on the first gear ring 4, and a first gap 24 is disposed between the first armature portion 23 and the first magnetized portion 22;

[0093] The first electromagnetic coil 21 is used to generate magnetic flux lines passing through the first magnetized portion 22 and the first armature portion 23 after being energized, so that the first magnetized portion 22 attracts the first armature portion 23 and drives the first gear ring 4 to move toward the first end surface matching tooth 12, thereby making the first end surface coupling tooth 10 engage and connect with the first end surface matching tooth 12;

[0094] The second electromagnetic component 9 includes a second electromagnetic coil 25 and a second magnetized portion 26, and the second electromagnetic coil 25 and the second magnetized portion 26 are both located outside the second gear ring 5;

[0095] A second armature portion 27 is disposed on the second gear ring 5, and a second gap 28 is disposed between the second armature portion 27 and the second magnetized portion 26;

[0096] The second electromagnetic coil 25 is used to generate magnetic lines of flux passing through the second magnetized portion 26 and the second armature portion 27 after being energized, so that the second magnetized portion 26 attracts the second armature portion 27 and thereby drives the second gear ring 5 to move toward the second end face mating tooth 13, thereby causing the second end face combining tooth 11 to be snap-connected with the second end face mating tooth 13.

[0097] Specifically, the magnetic flux lines generated after the first electromagnetic coil 21 is energized pass through the first magnetized portion 22 and the first armature portion 23, thereby fully magnetizing the first magnetized portion 22 and the first armature portion 23, and a first gap 24 is provided between the first armature portion 23 and the first magnetized portion 22, so that the first magnetized portion 22 can attract the first armature portion 23 to move to the left, thereby making the first end face coupling tooth 10 engage with the first end face matching tooth 12. Similarly, the magnetic flux lines generated after the second electromagnetic coil 25 is energized pass through the second magnetized portion 26 and the second armature portion 27, thereby fully magnetizing the second magnetized portion 26 and the second armature portion 27, and a second gap 28 is provided between the second armature portion 27 and the second magnetized portion 26, so that the second magnetized portion 26 can attract the second armature portion 27 to move to the right, thereby making the second end face coupling tooth 11 engage with the second end face matching tooth 13. In this embodiment, the first armature portion 23 and the first gear ring 4 are integrated into one piece, and the second armature portion 27 and the second gear ring 5 are integrated into one piece.

[0098] like Figures 1 to 4 As shown, the first armature part 23 is provided with a first inner bevel part 29 facing the first gear 1, the first magnetized part 22 is provided with a first outer bevel part 30 arranged opposite to the first inner bevel part 29, the first gap 24 is provided between the first inner bevel part 29 and the first outer bevel part 30, and the magnetic flux lines generated by the first electromagnetic coil 21 after being energized pass through the first outer bevel part 30 and the first inner bevel part 29, thereby causing the first magnetized part 22 to attract the first armature part 23 to the left and drive the first gear ring 4 to move toward the first end surface matching tooth 12;

[0099] The second armature portion 27 is provided with a second inner inclined portion 31 facing the second gear 2, the second magnetized portion 26 is provided with a second outer inclined portion 32 arranged opposite to the second inner inclined portion 31, and the second gap 28 is arranged between the second inner inclined portion 31 and the second outer inclined portion 32. The magnetic lines of force generated by the second electromagnetic coil 25 after being energized pass through the second inner inclined portion 31 and the second outer inclined portion 32, so that the second magnetized portion 26 attracts the second armature portion 27 to the right and drives the second gear ring 5 to move toward the second end face mating tooth 13.

[0100] Specifically, by providing the first inner bevel portion 29 and the first outer bevel portion 30, on the one hand, the first gap 24 can be set smaller, thereby reducing the magnetic flux loss, and on the other hand, the magnetic pole surface formed after magnetization can be made larger and easier to adsorb. Similarly, by providing the second inner bevel portion 31 and the second outer bevel portion 32, on the one hand, the second gap 28 can be set smaller, thereby reducing the magnetic flux loss, and on the other hand, the magnetic pole surface formed after magnetization can be made larger and easier to adsorb.

[0101] In this embodiment, the first electromagnetic coil 21, the first magnetized portion 22, the second electromagnetic coil 25 and the second magnetized portion 26 are fixedly arranged respectively; specifically, the first electromagnetic coil 21 and the second electromagnetic coil 25 are respectively installed in the outer shell 33, the outer shell 33 is fixedly arranged, and the first magnetized portion 22 and the second magnetized portion 26 are both connected to the outer shell 33; further specifically, the first magnetized portion 22 and the second magnetized portion 26 can be integrated with the outer shell 33.

[0102] In this embodiment, the intermediate shaft 3 is also connected to an output gear 34 .

[0103] Embodiment 2

[0104] like Figures 5 to 8 As shown, another tooth-type electromagnetic clutch comprises a first gear 1, a second gear 2, an intermediate shaft 3, a first ring gear 4, a second ring gear 5, a first elastic member 6, a second elastic member 7, a first electromagnetic component 8 and a second electromagnetic component 9;

[0105] The first gear 1 is rotatably connected to the intermediate shaft 3 and is used for transmission connection with the engine so as to receive the power output by the engine;

[0106] The second gear 2 is rotatably connected to the intermediate shaft 3 and is used for transmission connection with the drive motor so as to receive the power output by the drive motor;

[0107] The first gear ring 4 is connected to the first gear 1 so that it can slide relative to the first gear 1 in the axial direction and cannot rotate relative to the first gear 1 in the circumferential direction;

[0108] The second gear ring 5 is connected to the second gear 2 so as to be slidable relative to the second gear 2 in the axial direction and cannot be rotated relative to the second gear 2 in the circumferential direction;

[0109] The first gear ring 4 is provided with a first end surface coupling tooth 10, and the second gear ring 5 is provided with a second end surface coupling tooth 11;

[0110] The intermediate shaft 3 is provided with a first end surface matching tooth 12 and a second end surface matching tooth 13;

[0111] The first end surface combining tooth 10 is disposed opposite to the first end surface matching tooth 12, and the second end surface combining tooth 11 is disposed opposite to the second end surface matching tooth 13;

[0112] The first elastic member 6 abuts against the first gear ring 4 and is used to drive the first gear ring 4 to move away from the first end surface matching tooth 12 when the first electromagnetic component 8 is powered off so as to separate the first end surface engaging tooth 10 from the first end surface matching tooth 12;

[0113] The second elastic member 7 abuts against the second gear ring 5 and is used to drive the second gear ring 5 to move away from the second end surface matching teeth 13 when the second electromagnetic component 9 is powered off so as to separate the second end surface coupling teeth 11 from the second end surface matching teeth 13;

[0114] The first electromagnetic component 8 is used to generate a magnetic force to attract the first gear ring 4 to move toward the first end surface matching tooth 12 when powered on so that the first end surface coupling tooth 10 is engaged and connected with the first end surface matching tooth 12;

[0115] The second electromagnetic component 9 is used for generating a magnetic force to attract the second gear ring 5 to move toward the second end surface matching teeth 13 when powered on so that the second end surface coupling teeth 11 are engaged with the second end surface matching teeth 13 .

[0116] Specifically, when the first end surface combined teeth 10 and the first end surface matching teeth 12 are engaged, the first gear ring 4 can drive the intermediate shaft 3 to rotate at the same speed, and when the first end surface combined teeth 10 and the first end surface matching teeth 12 are separated, the power transmission between the first gear ring 4 and the intermediate shaft 3 is interrupted. Similarly, when the second end surface combined teeth 11 and the second end surface matching teeth 13 are engaged, the second gear ring 5 can drive the intermediate shaft 3 to rotate at the same speed, and when the second end surface combined teeth 11 and the second end surface matching teeth 13 are separated, the power transmission between the second gear ring 5 and the intermediate shaft 3 is interrupted. In the axial direction, the first gear ring 4 can slide freely on the first gear 1, and in the circumferential direction, the first gear ring 4 always keeps the same speed rotation or stops synchronously with the first gear 1; in the axial direction, the second gear ring 5 can slide freely on the second gear 2, and in the circumferential direction, the second gear ring 5 always keeps the same speed rotation or stops synchronously with the second gear 2.

[0117] Therefore, during driving, when the vehicle speed is low, it can be switched to pure electric mode. At this time, the first electromagnetic component 8 is powered off and the second electromagnetic component 9 is powered on. The first ring gear 4 moves to the left away from the first end face matching tooth 12 under the drive of the first elastic member 6 to separate the first end face matching tooth 10 from the first end face matching tooth 12, so that the power of the engine cannot be transmitted to the intermediate shaft 3; the second electromagnetic component 9 is powered on to generate magnetic force and attract the second ring gear 5 to move to the left toward the second end face matching tooth 13 so that the second end face matching tooth 11 is engaged with the second end face matching tooth 13. At this time, the power of the drive motor can be transmitted to the second gear 2, the second ring gear 5 and the intermediate shaft 3 in sequence, so the drive motor drives the intermediate shaft 3 to rotate alone. When the vehicle speed is high, the parallel mode can be entered. At this time, the first electromagnetic component 8 and the second electromagnetic component 9 are both energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move rightward toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12, and the second electromagnetic component 9 is energized to generate magnetic force and attract the second gear ring 5 to move leftward toward the second end surface matching tooth 13 so that the second end surface combination tooth 11 is engaged with the second end surface matching tooth 13. At this time, the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, and the power of the drive motor can be transmitted to the second gear 2, the second gear ring 5 and the intermediate shaft 3 in sequence. The engine and the drive motor jointly drive the intermediate shaft 3 to rotate. When the vehicle speed is faster, the engine direct drive mode can be entered. At this time, the first electromagnetic component 8 is energized and the second electromagnetic component 9 is de-energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move rightward toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12. The second gear ring 5 is driven by the second elastic member 7 to move rightward away from the second end surface matching tooth 13 so that the second end surface combination tooth 11 is separated from the second end surface matching tooth, so that the power of the drive motor cannot be transmitted to the intermediate shaft 3, and the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, so the engine alone drives the intermediate shaft 3 to rotate. It can be seen that the tooth-type electromagnetic clutch of the embodiment of the present application can not only control the transmission and interruption of the engine power, but also control the transmission and interruption of the drive motor power, so it can be used to switch the power source of the vehicle and the drive mode of the vehicle.

[0118] In this embodiment, the first gear 1 and the second gear 2 can be rotatably connected to the intermediate shaft 3 via needle bearings.

[0119] like Figures 5 to 8 As shown, the first gear 1 is provided with a first mounting sleeve 35, and the first gear ring 4 is slidably sleeved on the first mounting sleeve 35 through a spline;

[0120] The second gear 2 is provided with a second mounting sleeve 36, and the second gear ring 5 is slidably sleeved on the second mounting sleeve 36 through a spline;

[0121] The first gear ring 4 and the second gear ring 5 are both located between the first gear 1 and the second gear 2;

[0122] The intermediate shaft 3 is provided with a shaft shoulder 18 between the first gear ring 4 and the second gear ring 5;

[0123] The first end surface coupling tooth 10 is provided on one end of the first gear ring 4 facing the shaft shoulder 18, and the second end surface coupling tooth 11 is provided on one end of the second gear ring 5 facing the shaft shoulder 18;

[0124] The first end surface matching teeth 12 are arranged on one end of the shaft shoulder 18 facing the first gear ring 4, and the second end surface matching teeth 13 are arranged on one end of the shaft shoulder 18 facing the second gear ring 5; in this embodiment, the first gear ring 4 is provided with a first internal spline 14, the second gear ring 5 is provided with a second internal spline 15, the first mounting sleeve portion 35 is provided with a first external spline 16, and the second mounting sleeve portion 36 is provided with a second external spline 17, the first internal spline 14 is slidably sleeved on the first external spline 16 with clearance fit, and the second internal spline 15 is slidably sleeved on the second external spline 17 with clearance fit, thereby enabling the first gear ring 4 to slide relative to the first gear 1 in the axial direction but not to rotate relative to the first gear 1 in the circumferential direction, and enabling the second gear ring 5 to slide relative to the second gear 2 in the axial direction but not to rotate relative to the second gear 2 in the circumferential direction. Of course, in some embodiments, the first gear ring 4 can be slidably sleeved on the first mounting sleeve portion 35 by a flat key, and the second gear ring 5 can be slidably sleeved on the second mounting sleeve portion 36 by a flat key.

[0125] like Figures 5 to 8 As shown, the first mounting sleeve portion 35 is connected to a first retaining ring 19;

[0126] The first elastic member 6 is disposed between the first gear ring 4 and the first retaining ring 19, one end of the first elastic member 6 abuts against the first retaining ring 19, and the other end of the first elastic member 6 abuts against the first gear ring 4. The first elastic member 6 is used to drive the first gear ring 4 to move away from the first end surface matching tooth 12 when the first electromagnetic component 8 is powered off, thereby separating the first end surface combining tooth 10 from the first end surface matching tooth 12;

[0127] The second mounting sleeve portion 36 is connected to a second retaining ring 20;

[0128] The second elastic member 7 is arranged between the second gear ring 5 and the second retaining ring 20, one end of the second elastic member 7 abuts against the second retaining ring 20, and the other end of the second elastic member 7 abuts against the second gear ring 5. The second elastic member 7 is used to drive the second gear ring 5 to move away from the second end surface matching tooth 13 when the second electromagnetic component 9 is powered off, so as to separate the second end surface combined tooth 11 from the second end surface matching tooth 13; in this embodiment, the first retaining ring 19 can be installed and connected to the first installation sleeve part 35 by a retaining spring, the first retaining ring 19 is located on the inner side of the first end surface matching tooth 12, and the second retaining ring 20 can be installed and connected to the second installation sleeve part 36 by a retaining spring, and the second retaining ring 20 is located on the inner side of the second end surface matching tooth 13. In the axial direction, the first retaining ring 19 is located between the first gear ring 4 and the shaft shoulder 18, and the second retaining ring 20 is located between the second gear ring 5 and the shaft shoulder 18. Specifically, the first elastic member 6 and the second elastic member 7 can both be springs.

[0129] like Figures 5 to 8 As shown, the first electromagnetic component 8 includes a first electromagnetic coil 21, and the second electromagnetic component 9 includes a second electromagnetic coil 25;

[0130] The first gear ring 4 is provided with a first armature portion 23, and the second gear ring 5 is provided with a second armature portion 27;

[0131] The first electromagnetic coil 21 and the second electromagnetic coil 25 are both located between the first armature portion 23 and the second armature portion 27 and are both located outside the shaft shoulder 18. This design can save space, reduce the overall volume, and make the structure more compact.

[0132] The first electromagnetic coil 21 is used to attract the first armature part 23 when energized, thereby driving the first gear ring 4 to move toward the first end surface matching tooth 12 so that the first end surface coupling tooth 10 is engaged with the first end surface matching tooth 12;

[0133] The second electromagnetic coil 25 is used to attract the second armature part 27 when energized, thereby driving the second gear ring 5 to move toward the second end surface matching tooth 13 so that the second end surface coupling tooth 11 is engaged and connected with the second end surface matching tooth 13. Specifically, the first electromagnetic coil 21 and the second electromagnetic coil 25 are both installed in a fixed housing 33, and the housing 33 is provided with a first opening groove 37 facing the first armature part 23 and a second opening groove 38 facing the second armature part 27. The first electromagnetic coil 21 is installed in the first opening groove 37, and the second electromagnetic coil 25 is installed in the second opening groove 38. In this embodiment, the first armature part 23 is welded to the first gear ring 4, the second armature part 27 is welded to the second gear ring 5, and the intermediate shaft 3 is also connected with an output gear 34.

[0134] To sum up, during driving, when the vehicle speed is low, it can be switched to pure electric mode. At this time, the first electromagnetic component 8 is powered off and the second electromagnetic component 9 is powered on. The first ring gear 4 moves away from the first end face matching tooth 12 driven by the first elastic member 6 to separate the first end face combining tooth 10 from the first end face matching tooth 12, so that the power of the engine cannot be transmitted to the intermediate shaft 3; the second electromagnetic component 9 is powered on to generate magnetic force and attract the second ring gear 5 to move toward the second end face matching tooth 13 so that the second end face combining tooth 11 is engaged with the second end face matching tooth 13. At this time, the power of the drive motor can be transmitted to the second gear 2, the second ring gear 5 and the intermediate shaft 3 in sequence, so the drive motor drives the intermediate shaft 3 to rotate alone. When the vehicle speed is high, the parallel mode can be entered. At this time, the first electromagnetic component 8 and the second electromagnetic component 9 are both energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12, and the second electromagnetic component 9 is energized to generate magnetic force and attract the second gear ring 5 to move toward the second end surface matching tooth 13 so that the second end surface combination tooth 11 is engaged with the second end surface matching tooth 13. At this time, the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, and the power of the drive motor can be transmitted to the second gear 2, the second gear ring 5 and the intermediate shaft 3 in sequence. The engine and the drive motor jointly drive the intermediate shaft 3 to rotate. When the vehicle speed is faster, the engine direct drive mode can be entered. At this time, the first electromagnetic component 8 is energized and the second electromagnetic component 9 is de-energized. The first electromagnetic component 8 is energized to generate magnetic force and attract the first gear ring 4 to move toward the first end surface matching tooth 12 so that the first end surface combination tooth 10 is engaged with the first end surface matching tooth 12. The second gear ring 5 is driven by the second elastic member 7 to move away from the second end surface matching tooth 13 so that the second end surface combination tooth 11 is separated from the second end surface matching tooth, so that the power of the drive motor cannot be transmitted to the intermediate shaft 3, and the power of the engine can be transmitted to the first gear 1, the first gear ring 4 and the intermediate shaft 3 in sequence, so the engine alone drives the intermediate shaft 3 to rotate. It can be seen that the tooth-type electromagnetic clutch of the embodiment of the present application can not only control the transmission and interruption of the engine power, but also control the transmission and interruption of the drive motor power, so it can be used to switch the power source of the vehicle and the drive mode of the vehicle.

[0135] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tooth-type electromagnetic clutch, characterized in that: It comprises a first gear (1), a second gear (2), an intermediate shaft (3), a first gear ring (4), a second gear ring (5), a first elastic member (6), a second elastic member (7), a first electromagnetic component (8) and a second electromagnetic component (9); The first gear (1) is rotatably connected to the intermediate shaft (3) and is used for transmission connection with the engine so as to receive the power output by the engine; The second gear (2) is rotatably connected to the intermediate shaft (3) and is used for transmission connection with the drive motor so as to receive the power output by the drive motor; The first gear ring (4) is connected to the intermediate shaft (3) so as to be axially slidable relative to the intermediate shaft (3) but circumferentially non-rotatable relative to the intermediate shaft (3); The second gear ring (5) is connected to the intermediate shaft (3) so as to be axially slidable relative to the intermediate shaft (3) but circumferentially non-rotatable relative to the intermediate shaft (3); The first gear ring (4) is provided with a first end surface coupling tooth (10), and the second gear ring (5) is provided with a second end surface coupling tooth (11); The first gear (1) is provided with a first end surface matching tooth (12), and the second gear (2) is provided with a second end surface matching tooth (13); The first end surface engaging teeth (10) are arranged opposite to the first end surface matching teeth (12), and the second end surface engaging teeth (11) are arranged opposite to the second end surface matching teeth (13); The first elastic member (6) abuts against the first gear ring (4) and is used to drive the first gear ring (4) to move away from the first end surface matching tooth (12) when the first electromagnetic component (8) is powered off, so as to separate the first end surface coupling tooth (10) from the first end surface matching tooth (12); The second elastic member (7) abuts against the second gear ring (5) and is used to drive the second gear ring (5) to move away from the second end surface matching tooth (13) when the second electromagnetic component (9) is powered off, so as to separate the second end surface coupling tooth (11) from the second end surface matching tooth (13); The first electromagnetic component (8) is used to generate a magnetic force to attract the first gear ring (4) to move toward the first end surface matching tooth (12) when powered on, so that the first end surface coupling tooth (10) is engaged and connected with the first end surface matching tooth (12); The second electromagnetic component (9) is used to generate a magnetic force to attract the second gear ring (5) to move toward the second end surface matching tooth (13) when energized so that the second end surface coupling tooth (11) is engaged and connected with the second end surface matching tooth (13).

2. The tooth-type electromagnetic clutch according to claim 1, characterized in that: The first gear ring (4) is slidably sleeved on the intermediate shaft (3) via a spline, and the second gear ring (5) is slidably sleeved on the intermediate shaft (3) via a spline.

3. The dog-type electromagnetic clutch according to claim 1, characterized in that: The first gear ring (4) and the second gear ring (5) are both located between the first gear (1) and the second gear (2); the first gear (1), the first gear ring (4), the second gear ring (5) and the second gear (2) are arranged in sequence along the axial direction of the intermediate shaft (3).

4. The dog-type electromagnetic clutch according to claim 3, characterized in that: The intermediate shaft (3) is provided with a shaft shoulder (18) located between the first gear ring (4) and the second gear ring (5); The intermediate shaft (3) is also connected to a first retaining ring (19) and a second retaining ring (20); The first elastic member (6) is arranged between the first gear ring (4) and the first retaining ring (19), one end of the first elastic member (6) abuts against the first retaining ring (19), and the other end of the first elastic member (6) abuts against the first gear ring (4), and the first elastic member (6) is used to drive the first gear ring (4) to move away from the first end face matching tooth (12) to abut against the shaft shoulder (18) and separate the first end face coupling tooth (10) from the first end face matching tooth (12) when the first electromagnetic component (8) is powered off; The second elastic member (7) is arranged between the second gear ring (5) and the second retaining ring (20); one end of the second elastic member (7) abuts against the second retaining ring (20), and the other end of the second elastic member (7) abuts against the second gear ring (5); the second elastic member (7) is used to drive the second gear ring (5) to move away from the second end face matching tooth (13) to abut against the shaft shoulder (18) when the second electromagnetic component (9) is powered off, and to separate the second end face coupling tooth (11) from the second end face matching tooth (13).

5. The dog-type electromagnetic clutch according to claim 1, characterized in that: The first electromagnetic component (8) is disposed around the outside of the first gear ring (4), and the second electromagnetic component (9) is disposed around the outside of the second gear ring (5); The first electromagnetic component (8) comprises a first electromagnetic coil (21) and a first magnetized portion (22), and the first electromagnetic coil (21) and the first magnetized portion (22) are both located outside the first gear ring (4); A first armature portion (23) is provided on the first gear ring (4), and a first gap (24) is provided between the first armature portion (23) and the first magnetized portion (22); The first electromagnetic coil (21) is used to generate magnetic flux lines passing through the first magnetized portion (22) and the first armature portion (23) after being energized, so that the first magnetized portion (22) attracts the first armature portion (23) and thereby drives the first gear ring (4) to move toward the first end surface matching tooth (12); The second electromagnetic component (9) comprises a second electromagnetic coil (25) and a second magnetized portion (26), and the second electromagnetic coil (25) and the second magnetized portion (26) are both located outside the second gear ring (5); A second armature portion (27) is provided on the second gear ring (5), and a second gap (28) is provided between the second armature portion (27) and the second magnetized portion (26); The second electromagnetic coil (25) is used to generate magnetic flux lines passing through the second magnetized portion (26) and the second armature portion (27) after being energized, so that the second magnetized portion (26) attracts the second armature portion (27) and thereby drives the second gear ring (5) to move toward the second end face matching tooth (13).

6. The dog-type electromagnetic clutch according to claim 5, characterized in that: The first armature portion (23) is provided with a first inner bevel portion (29) facing the first gear (1); the first magnetized portion (22) is provided with a first outer bevel portion (30) arranged opposite to the first inner bevel portion (29); the first gap (24) is provided between the first inner bevel portion (29) and the first outer bevel portion (30); and the magnetic flux lines generated by the first electromagnetic coil (21) after being energized pass through the first outer bevel portion (30) and the first inner bevel portion (29); The second armature portion (27) is provided with a second inner inclined portion (31) facing the second gear (2); the second magnetized portion (26) is provided with a second outer inclined portion (32) arranged opposite to the second inner inclined portion (31); the second gap (28) is provided between the second inner inclined portion (31) and the second outer inclined portion (32); and the magnetic flux lines generated by the second electromagnetic coil (25) when energized pass through the second inner inclined portion (31) and the second outer inclined portion (32).

7. A tooth-type electromagnetic clutch, characterized in that: It comprises a first gear (1), a second gear (2), an intermediate shaft (3), a first gear ring (4), a second gear ring (5), a first elastic member (6), a second elastic member (7), a first electromagnetic component (8) and a second electromagnetic component (9); The first gear (1) is rotatably connected to the intermediate shaft (3) and is used for transmission connection with the engine so as to receive the power output by the engine; The second gear (2) is rotatably connected to the intermediate shaft (3) and is used for transmission connection with the drive motor so as to receive the power output by the drive motor; The first gear ring (4) is connected to the first gear (1) so as to be axially slidable relative to the first gear (1) but circumferentially non-rotatable relative to the first gear (1); The second gear ring (5) is connected to the second gear (2) in a manner that it can slide axially relative to the second gear (2) but cannot rotate circumferentially relative to the second gear (2); The first gear ring (4) is provided with a first end surface coupling tooth (10), and the second gear ring (5) is provided with a second end surface coupling tooth (11); The intermediate shaft (3) is provided with a first end surface matching tooth (12) and a second end surface matching tooth (13); The first end surface engaging teeth (10) are arranged opposite to the first end surface matching teeth (12), and the second end surface engaging teeth (11) are arranged opposite to the second end surface matching teeth (13); The first elastic member (6) abuts against the first gear ring (4) and is used to drive the first gear ring (4) to move away from the first end surface matching tooth (12) when the first electromagnetic component (8) is powered off, so as to separate the first end surface coupling tooth (10) from the first end surface matching tooth (12); The second elastic member (7) abuts against the second gear ring (5) and is used to drive the second gear ring (5) to move away from the second end surface matching tooth (13) when the second electromagnetic component (9) is powered off, so as to separate the second end surface coupling tooth (11) from the second end surface matching tooth (13); The first electromagnetic component (8) is used to generate a magnetic force to attract the first gear ring (4) to move toward the first end surface matching tooth (12) when powered on, so that the first end surface coupling tooth (10) is engaged and connected with the first end surface matching tooth (12); The second electromagnetic component (9) is used to generate a magnetic force to attract the second gear ring (5) to move toward the second end surface matching tooth (13) when energized so that the second end surface coupling tooth (11) is engaged and connected with the second end surface matching tooth (13).

8. The dog-type electromagnetic clutch according to claim 7, characterized in that: The first gear (1) is provided with a first mounting sleeve (35), and the first gear ring (4) is slidably sleeved on the first mounting sleeve (35) via a spline; The second gear (2) is provided with a second mounting sleeve (36), and the second gear ring (5) is slidably sleeved on the second mounting sleeve (36) via a spline; The first gear ring (4) and the second gear ring (5) are both located between the first gear (1) and the second gear (2); The intermediate shaft (3) is provided with a shaft shoulder (18) located between the first gear ring (4) and the second gear ring (5); The first end surface coupling tooth (10) is arranged on an end portion of the first gear ring (4) facing the shaft shoulder (18), and the second end surface coupling tooth (11) is arranged on an end portion of the second gear ring (5) facing the shaft shoulder (18); The first end surface matching tooth (12) is arranged on an end of the shaft shoulder (18) facing the first gear ring (4), and the second end surface matching tooth (13) is arranged on an end of the shaft shoulder (18) facing the second gear ring (5).

9. The dog-type electromagnetic clutch according to claim 8, characterized in that: The first mounting sleeve (35) is connected to a first retaining ring (19); The first elastic member (6) is arranged between the first gear ring (4) and the first retaining ring (19), one end of the first elastic member (6) abuts against the first retaining ring (19), and the other end of the first elastic member (6) abuts against the first gear ring (4), and the first elastic member (6) is used to drive the first gear ring (4) to move away from the first end face matching tooth (12) when the first electromagnetic component (8) is powered off, thereby separating the first end face coupling tooth (10) from the first end face matching tooth (12); The second mounting sleeve (36) is connected to a second retaining ring (20); The second elastic member (7) is arranged between the second gear ring (5) and the second retaining ring (20); one end of the second elastic member (7) abuts against the second retaining ring (20), and the other end of the second elastic member (7) abuts against the second gear ring (5); the second elastic member (7) is used to drive the second gear ring (5) to move away from the second end face matching tooth (13) when the second electromagnetic component (9) is powered off, thereby separating the second end face coupling tooth (11) from the second end face matching tooth (13).

10. The dog-type electromagnetic clutch according to claim 8, characterized in that: The first electromagnetic component (8) comprises a first electromagnetic coil (21), and the second electromagnetic component (9) comprises a second electromagnetic coil (25); The first gear ring (4) is provided with a first armature portion (23), and the second gear ring (5) is provided with a second armature portion (27); The first electromagnetic coil (21) and the second electromagnetic coil (25) are both located between the first armature part (23) and the second armature part (27) and are both located outside the shaft shoulder (18); The first electromagnetic coil (21) is used to attract the first armature part (23) when energized, thereby driving the first gear ring (4) to move toward the first end surface matching tooth (12) so that the first end surface coupling tooth (10) is engaged and connected with the first end surface matching tooth (12); The second electromagnetic coil (25) is used to attract the second armature part (27) when energized, thereby driving the second gear ring (5) to move toward the second end surface matching tooth (13) so that the second end surface coupling tooth (11) is engaged and connected with the second end surface matching tooth (13).

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