Motor shaft brake device

Abstract

The application provides a motor shaft brake device, which comprises a base body arranged on a gearbox, the base body having a vertical part, a connecting assembly having a first through hole, a motor shaft arranged in the first through hole, the motor shaft being fixedly connected with the connecting assembly, the motor shaft being arranged on the side of the vertical part away from the gearbox, and the end of the connecting assembly close to the base body being sleeved outside the vertical part; a brake assembly is sleeved outside the vertical part and arranged on the side of the connecting assembly close to the gearbox, the brake assembly having a first state and a second state, in the first state, the brake assembly limits the rotation of the motor shaft, and in the second state, the brake assembly releases the motor shaft; and a driving assembly is used for driving the brake assembly to switch between the first state and the second state. The scheme can switch the brake assembly to the first state under the working condition that the engine works and the motor shaft does not work, so that the brake assembly limits the rotation of the motor shaft, the power loss of the engine is reduced, the fuel consumption is saved, the high-frequency wear of the motor shaft and other accessories can be avoided, and the service life of the motor shaft is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-electric hybrid power, in particular to a motor shaft braking device. BACKGROUND

[0002] In recent years, in response to the requirements of green and sustainable development, oil-electric hybrid power systems are widely used in various fields, such as oil-electric hybrid vehicles. They combine the engine and the electric motor, which not only has the advantages of gasoline engine providing power at high speed and optimizing energy provided by fuel, but also has the functions of electric motor outputting strong torque at low speed, reducing fuel consumption and purifying emissions.

[0003] In the prior art, for example, application No. CN200810190764.6 proposes a parallel type automobile oil-electric hybrid power system, which discloses that one end of the motor shaft is connected with the shaft of the engine through a one-way clutch and a torque limiting clutch, the other end of the motor shaft is connected with the input shaft of the gearbox, the output shaft of the gearbox is connected with the drive shaft of the wheel, and the oil-electric hybrid gearbox. When the engine is working, the motor shaft will be rotated together, which not only increases the power loss of the engine and increases fuel consumption, but also increases the wear of the motor shaft and its matching parts when the motor shaft rotates without working, reducing its service life. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, the present application aims to provide a motor shaft braking device for an oil-electric hybrid power system, comprising:

[0005] A base body is arranged on the housing of the gearbox, and the base body has a vertical part;

[0006] A connecting assembly has a first through hole, a motor shaft is arranged in the first through hole, the motor shaft is fixedly connected with the connecting assembly, the motor shaft is arranged on the side of the vertical part away from the gearbox, and the end of the connecting assembly close to the base body is sleeved outside the vertical part;

[0007] A braking assembly is sleeved outside the vertical part and arranged on the side of the connecting assembly close to the gearbox, the braking assembly has a first state and a second state, in the first state, the braking assembly restricts the rotation of the motor shaft, and in the second state, the braking assembly releases the motor shaft;

[0008] A driving assembly is used to drive the braking assembly to switch between the first state and the second state.

[0009] According to the technical scheme provided in the embodiment of the present application, the connecting assembly is provided with a first brake disc close to the gearbox side, the first brake disc is sleeved outside the vertical part, and the first brake disc is provided with a first ring tooth close to the base body side; the brake assembly comprises:

[0010] a second brake disc, which is sleeved outside the vertical part and is arranged close to the base body side of the first brake disc, the second brake disc is provided with a second ring tooth away from the base body side, and the second ring tooth is matched with the first ring tooth; the second brake disc is movable along the vertical part.

[0011] According to the technical scheme provided in the embodiment of the present application, the driving assembly comprises an electromagnetic element, the electromagnetic element is arranged away from the first brake disc side of the second brake disc; when the electromagnetic element is powered on, the second brake disc moves along the vertical part away from the base body side, and moves to the second ring tooth and the first ring tooth are engaged, at this time, the brake assembly is in the first state; when the electromagnetic element is powered off, the second ring tooth and the first ring tooth are separated, at this time, the brake assembly is switched from the first state to the second state.

[0012] According to the technical scheme provided in the embodiment of the present application, the first brake disc is provided with a first mounting piece away from the second brake disc side, the first mounting piece is provided with a first opening away from the base body side, the first opening is in communication with the first through hole, the inner wall of the first opening is provided with a ring tooth, and the ring tooth is engaged with the outer wall tooth of the motor shaft.

[0013] According to the technical scheme provided in the embodiment of the present application, the vertical part is sleeved with a first stop ring, and the first stop ring is arranged away from the base body side of the electromagnetic element.

[0014] According to the technical scheme provided in the embodiment of the present application, the first brake disc is provided with a reset element close to the second brake disc side, and the reset element resets the second brake disc when the electromagnetic element is powered off.

[0015] According to the technical scheme provided in the embodiment of the present application, the first mounting piece is provided with a protruding part away from the second brake disc side, the first opening is arranged on the protruding part, the edge close to the second brake disc side of the protruding part extends outward to form a first extension part, the first connection assembly is arranged on the first extension part, and the first connection assembly is used for connecting the first mounting piece and the first brake disc.

[0016] According to the technical scheme provided in the embodiment of the application, the first brake disc has a second extension part, the second extension part is connected with the first extension part through the first connecting assembly, the second extension part extends to the side of the base body from the end of the vertical part to form a third extension part, and the end of the third extension part has the first ring tooth.

[0017] According to the technical scheme provided in the embodiment of the application, a first bearing is arranged between the third extension part and the vertical part, and the first bearing is used for stabilizing the rotation of the motor shaft, the first mounting piece and the first brake disc when the brake assembly is in the second state.

[0018] According to the technical scheme provided in the embodiment of the application, the two ends of the first bearing are provided with a second retainer ring and a third retainer ring, and the second retainer ring and the third retainer ring are used for limiting the movement of the first bearing along the vertical part.

[0019] In summary, the application provides a motor shaft brake device for an oil-electric hybrid power system, which comprises a base body arranged on a gearbox shell, the base body having a vertical part, a connecting assembly having a first through hole, a motor shaft arranged in the first through hole, the motor shaft being fixedly connected with the connecting assembly, the motor shaft being arranged on the side of the vertical part away from the gearbox, and the connecting assembly being sleeved on the outside of the vertical part at the end of the base body close to the base body. A brake assembly is sleeved on the outside of the vertical part and arranged on the side of the connecting assembly close to the gearbox, the brake assembly having a first state and a second state, in the first state, the brake assembly limiting the rotation of the motor shaft, and in the second state, the brake assembly releasing the motor shaft. A driving assembly is used for driving the brake assembly to switch between the first state and the second state. The scheme can switch the brake assembly to the first state under the working condition that the engine works and the motor shaft does not work, so as to limit the rotation of the motor shaft by the brake assembly, reduce the power loss of the engine, save fuel consumption, avoid high-frequency wear of the motor shaft and other accessories, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 An exploded structural schematic view of the motor shaft brake device provided in the embodiment of the application is shown in the figure.

[0021] Figure 2 An assembled structural schematic view of the motor shaft brake device provided in the embodiment of the application is shown in the figure.

[0022] Figure 3 A sectional view of the motor shaft brake device provided in the embodiment of the application (the electromagnetic element is not powered) is shown in the figure.

[0023] Figure 4 A sectional view of the motor shaft brake device provided in the embodiment of the application (the electromagnetic element is powered) is shown in the figure.

[0024] The text annotations in the figure represent:

[0025] 1, base body; 11, vertical part; 12, guide groove; 2, electromagnetic element; 3, first check ring; 4, second brake disc; 41, second ring tooth; 42, guide block; 43, first ring groove; 5, reset element; 6, second check ring; 7, first bearing; 8, third check ring; 9, first brake disc; 91. First ring tooth; 92, second extension; 93, third extension; 94, first boss; 10, first mounting; 101, protruding part; 102, tooth; 103, first extension; 13, first connecting assembly. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are merely intended to explain the relevant application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0027] It should be noted that the examples in the present application and the features in the examples can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in conjunction with the examples.

[0028] As mentioned in the background, in order to solve the problems in the prior art, the present application provides a motor shaft brake device for an oil-electric hybrid power system, comprising:

[0029] A base body 1 is arranged on the housing of the gearbox, and the base body 1 has a vertical part 11;

[0030] A connecting assembly has a first through hole, and a motor shaft is arranged in the first through hole. The motor shaft is fixedly connected with the connecting assembly, and the motor shaft is arranged on the side of the vertical part 11 away from the gearbox. The end of the connecting assembly close to the base body 1 is sleeved outside the vertical part 11;

[0031] A brake assembly is sleeved outside the vertical part 11 and arranged on the side of the connecting assembly close to the gearbox. The brake assembly has a first state and a second state. In the first state, the brake assembly restricts the rotation of the motor shaft. In the second state, the brake assembly releases the motor shaft;

[0032] A driving assembly is used to drive the brake assembly to switch between the first state and the second state.

[0033] Please refer to Figure 1As shown, the base body 1 has a disc-shaped base connected to the housing of the gearbox by a plurality of bolts, the base has a vertical part 11 in the center, the outer wall of the vertical part 11 has a plurality of annular grooves adapted for mounting other elements, and the vertical part 11 is a hollow structure.

[0034] Specifically, the vertical part 11 also has a guide groove 12, and the distribution direction of each annular groove is the same as the extension length of the guide groove 12, which is the same as the axial direction of the vertical part 11.

[0035] Specifically, the motor shaft has a gap with the vertical part 11, the motor shaft is a hollow structure, the motor shaft is sleeved outside the engine shaft, the engine shaft penetrates the hollow structure of the motor shaft and the hollow structure of the vertical part 11, and is connected with the internal elements of the gearbox to provide oil consumption power, while the motor shaft torque is transmitted to the gearbox through the connecting assembly, the base body 1 and other elements.

[0036] Specifically, for a hybrid vehicle, when the vehicle speed is greater than 60 kilometers per hour, the brake assembly is in the first state, which limits the rotation of the motor shaft, at this time the motor shaft stops rotating and the engine shaft rotates, realizing oil consumption to provide power, and when the vehicle speed is less than 60 kilometers per hour, the brake assembly switches to the second state, the motor shaft is released, the motor shaft rotates to transmit power, realizing electric consumption to provide power.

[0037] Specifically, the motor shaft is driven to rotate by the engine shaft when it does not need to rotate for power supply, which also increases the temperature of the gearbox when the engine shaft is working; in this case, the rotation of the motor shaft also has a small power of reverse charging, which affects the service life of the battery. Therefore, the brake assembly brakes the rotation of the motor shaft in this case, which not only prevents unnecessary wear of the motor shaft, but also protects the on-board battery and other remaining vehicle elements.

[0038] In a preferred embodiment, the connecting assembly has a first brake disc 9 near the gearbox side, the first brake disc 9 is sleeved outside the vertical part 11, and the first brake disc 9 has a first ring tooth 91 near the base body 1 side; the brake assembly comprises:

[0039] a second brake disc 4, the second brake disc 4 is sleeved outside the vertical part 11 and is arranged near the first brake disc 9 side of the base body 1, the second brake disc 4 has a second ring tooth 41 adapted to the first ring tooth 91 away from the base body 1 side; the second brake disc 4 is movable along the vertical part 11.

[0040] Please refer to Figure 2As shown, the first ring gear and the second ring gear are mutually adapted trapezoidal gears.

[0041] Specifically, the second brake disc 4 is a hollow cylindrical structure with a certain thickness, the cylindrical structure has the second ring gear 41 on the side away from the base body 1, and the inner wall of the cylindrical structure has a guide block 42 adapted to the guide groove 12. When the second brake disc 4 is sleeved on the vertical part 11, the guide block 42 and the guide groove 12 cooperate to enable the second brake disc 4 to move axially only along the vertical part 11.

[0042] In a preferred embodiment, the driving assembly includes an electromagnetic element 2 arranged on the side of the second brake disc 4 away from the first brake disc 9. When the electromagnetic element 2 is powered on, the second brake disc 4 moves along the vertical part 11 away from the base body 1, and moves to the position where the second ring gear 41 meshes with the first ring gear 91, at which time the brake assembly is in the first state. When the electromagnetic element 2 is powered off, the second ring gear 41 and the first ring gear 91 are separated, and at this time the brake assembly switches from the first state to the second state.

[0043] Please refer to Figure 1 As shown, the electromagnetic element 2 includes an electromagnetic actuator, and there is a certain gap between the electromagnetic actuator and the disc-shaped base of the base body 1. After the electromagnetic actuator is powered on, it can provide power for the second brake disc 4 to move along the vertical part 11 away from the base body 1. After the electromagnetic actuator is powered off, the power disappears, and the second brake disc 4 can be reset.

[0044] Please refer to Figure 4 As shown, after the electromagnetic actuator is powered on, the second brake disc 4 moves along the vertical part 11 away from the base body 1. When it moves to the position where the second ring gear 41 meshes with the first ring gear 91 (but there is still a certain gap between them), the gap is controlled at 1.5-2.1 mm through the size chain design of each component. The transmission is high-speed rotation, and the non-rotating part and the rotating part need to have a certain large gap to ensure that there is no collision and friction contact during high-speed rotation. Therefore, this gap design not only allows the first ring gear 91 and the second ring gear 41 to be clamped and limit the rotation of the first brake disc 9, thereby limiting the rotation of the motor shaft, but also protects the toothed structure of the first ring gear 91 and the second ring gear 41, avoiding wear caused by long-term and frequent meshing.

[0045] In a preferred embodiment, the first brake disc 9 is provided with a first mounting member 10 on the side away from the second brake disc 4, the first mounting member 10 has a first opening on the side away from the base body 1, the first opening is in communication with the first through hole, the inner wall of the first opening is provided with a ring of teeth 102, the teeth 102 are in meshing engagement with the teeth on the outer wall of the motor shaft.

[0046] In a preferred embodiment, the first mounting member 10 is provided with a protruding portion 101 on the side away from the second brake disc 4, the first opening is formed in the protruding portion 101, the edge of the protruding portion 101 near the second brake disc 4 extends outward to form a first extension portion 103, the first connection assembly 13 is arranged on the first extension portion 103, and the first connection assembly 13 is used to connect the first mounting member 10 and the first brake disc 9.

[0047] Specifically, the first mounting member 10 is a spline flange, the spline flange has a lens shape, the protruding portion 101 of the spline flange is provided with a circular first opening, the inner diameter of the first opening is smaller than the first through hole, the inner diameter of the first opening is matched with the motor shaft, the teeth 102 are also splines, the teeth 102 are matched with the splines on the outer wall of the motor shaft, and the movement states of the first mounting member 10, the first brake disc 9 and the motor shaft are synchronized.

[0048] In a preferred embodiment, the vertical portion 11 is externally provided with a first retaining ring 3, and the first retaining ring 3 is arranged on the side away from the base body 1 of the electromagnetic element 2.

[0049] Please refer to Figure 1 It can be seen that the first retaining ring 3 and the disc-shaped base of the base body 1 jointly limit the axial movement of the shell of the electromagnetic element 2, one end surface of the first retaining ring 3 abuts against the electromagnetic element 2, and the other end surface abuts against the second brake disc 4 near the side of the base body 1.

[0050] In a preferred embodiment, the first brake disc 9 is provided with a reset element 5 on the side near the second brake disc 4, and the reset element 5 resets the second brake disc 4 when the electromagnetic element 2 is powered off.

[0051] Please refer to Figure 1 It can be seen that the second brake disc is provided with a first annular groove 43 on the end surface away from the base body 1, the reset element 5 is arranged in the first annular groove 43, the reset element 5 is also externally arranged on the vertical portion 11, the reset element 5 is a disc spring, and the first brake disc 9 is arranged on the side away from the first annular groove 43 of the disc spring.

[0052] Please refer to Figure 3As shown, when the motor shaft does not need to rotate, the brake assembly is in the first state, the second brake disc 4 moves towards the first brake disc 9, and finally the first ring teeth 91 and the second ring teeth 41 are engaged, at this time the disc spring is in a compressed and stored state; when the motor shaft needs to rotate, the brake assembly switches from the first state to the second state, specifically, the electromagnetic actuator is powered off, the spring force stored by the disc spring is released, the spring force restores the second brake disc 4 to the original position, and the second brake disc 4 is disengaged from the first brake disc 9.

[0053] In a preferred embodiment, the first brake disc 9 has a second extension 92, the second extension 92 is connected with the first extension 103 through the first connecting assembly 13, the second extension 92 extends to the side of the base body 1 near the end of the vertical part 11 to form a third extension 93, and the end of the third extension 93 has the first ring teeth 91.

[0054] As shown in Figure 1 As shown, the first connecting assembly 13 is a plurality of bolts, and the third extension 93 is parallel to the vertical part 11.

[0055] In a preferred embodiment, a first bearing 7 is arranged between the third extension 93 and the vertical part 11, and when the brake assembly is in the second state, the first bearing 7 is used to stabilize the rotation of the motor shaft, the first mounting 10 and the first brake disc 9.

[0056] As shown in Figure 1 As shown, the first bearing 7 and the first brake disc 9 are interference press-fitted, the third extension 93 has a first boss 94 near the side of the base body 1, the protruding direction of the first boss 94 is towards the vertical part 11, the first bearing 7 is arranged on the first boss 94, and the first bearing 7 is connected with the first brake disc 9 and the first mounting 10, which is used to improve the stability of the rotation of the first mounting 10 and the first brake disc 9 when the motor shaft rotates.

[0057] In a preferred embodiment, the first bearing 7 is provided with a second retainer 6 and a third retainer 8 at both ends, and the second retainer 6 and the third retainer 8 are used to limit the movement of the first bearing 7 along the vertical part 11.

[0058] As shown in Figure 1As shown, the vertical part 11 has a second ring groove at the end away from the gearbox, the second ring groove is provided with the second check ring 6, the second check ring 6 is provided with the disc spring close to the base body 1 side, the first boss 94 is close to the base body 1 side, the vertical part 11 also has a second ring groove, the second ring groove is provided with the third check ring 8, the third check ring 8 does not affect the movement of the second brake disc 4 along the vertical part 11 away from the base body 1 side, so as not to affect the engagement of the first ring gear 91 and the second ring gear 41 when the brake assembly is in the first state.

[0059] Specifically, the whole device control is simple, for the oil-electric hybrid system car, can be by vehicle control system according to real-time state self-regulation and control, when the brake device works, the action is rapid, the noise is small, the function relies on mechanical structure to realize, the stability is good, the transmission efficiency is high, at the same time, reduces the power waste of hybrid transmission, improves the transmission efficiency, prevents the motor shaft from working in reverse charging, protects the new energy hybrid vehicle drive battery, improves the service life, has wide application space.

[0060] Specifically, the device is not only limited to be used in the oil-electric hybrid system car, but also can be applied to all tools of the oil-electric hybrid system, such as unmanned aerial vehicle, lawn trimming tool vehicle and the like, but is not limited thereto.

[0061] The principles and implementation modes of the present application are described by using specific examples in the present application, and the above example description is only used to help understand the method and its core idea. The above description is only the preferred embodiment of the present application. It should be pointed out that due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the art, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical scheme to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. An electric machine shaft braking device for a hybrid electric system, characterized by, The utility model relates to a kind of brake mechanism of motor shaft, including: Base body (1), the base body (1) is located on the shell of gearbox, the base body (1) has vertical part (11); Connecting assembly, the first through hole is equipped with motor shaft in the connecting assembly, the motor shaft is fixedly connected with the connecting assembly, the motor shaft is located at the vertical part (11) side away from the gearbox, the end of the connecting assembly close to the base body (1) is sleeved outside the vertical part (11); Brake assembly, the brake assembly is sleeved outside the vertical part (11), and is located at the connecting assembly side close to the gearbox, the brake assembly has first state and second state, in the first state, the brake assembly restricts the motor shaft rotation, in the second state, the brake assembly releases the motor shaft; Driving assembly, the driving assembly is used to drive the brake assembly to switch between the first state and the second state; The connecting assembly side close to the gearbox has first brake disc (9), the first brake disc (9) is equipped with second brake disc (4) side close to the base body (1), the first brake disc (9) is equipped with first mounting piece (10) side away from the second brake disc (4), the first mounting piece (10) is away from the base body (1) side with first opening, the first opening is communicated with the first through hole, the first opening inner wall has a ring of gear teeth, the gear teeth are meshed with the motor shaft outer wall gear.

2. The motor shaft brake apparatus according to claim 1, characterized by: The first brake disc (9) is sleeved outside the vertical part (11), and the first brake disc (9) is equipped with a ring of first ring gear (91) side close to the base body (1);The brake assembly includes: The second brake disc (4) is sleeved outside the vertical part (11), and the second brake disc (4) is equipped with a ring of second ring gear (41) side away from the base body (1) and adapted to the first ring gear (91);The second brake disc (4) can be moved along the vertical part (11).

3. An electric machine shaft brake arrangement according to claim 2, characterized in that: The driving assembly includes electromagnetic element (2), and the electromagnetic element (2) is located at the second brake disc (4) side away from the first brake disc (9);When the electromagnetic element (2) is powered, the second brake disc (4) is moved along the vertical part (11) towards the side away from the base body (1), and is moved to the second ring gear (41) and the first ring gear (91) meshing, at this time, the brake assembly is in the first state;When the electromagnetic element (2) is powered off, the second ring gear (41) is separated from the first ring gear (91), at this time, the brake assembly switches from the first state to the second state.

4. An electric machine shaft brake arrangement according to claim 3, characterized in that: The vertical part (11) is sleeved with first retaining ring (3), and the first retaining ring (3) is located at the electromagnetic element (2) side away from the base body (1).

5. The motor shaft brake apparatus of claim 3, wherein: The first brake disc (9) is equipped with reset element (5) side close to the second brake disc (4), when the electromagnetic element (2) is powered off, the reset element (5) resets the second brake disc (4).

6. The motor shaft brake apparatus of claim 2, wherein: The first mounting piece (10) has a protruding part (101) on the side away from the second brake disc (4), the first opening is arranged on the protruding part (101), and the edge of the protruding part (101) on the side close to the second brake disc (4) extends outward to form a first extension part (103), the first connection assembly (13) is arranged on the first extension part (103), and the first connection assembly (13) is used for connecting the first mounting piece (10) and the first brake disc (9).

7. An electric machine shaft brake arrangement according to claim 6, characterized in that: The first brake disc (9) has a second extension part (92), the second extension part (92) is connected with the first extension part (103) through the first connection assembly (13), the second extension part (92) extends to the side of the base body (1) to form a third extension part (93) close to the end of the vertical part (11), and the end of the third extension part (93) has the first ring tooth (91).

8. An electric machine shaft brake arrangement according to claim 7, characterized in that: The first bearing (7) is arranged between the third extension part (93) and the vertical part (11), and is used for stabilizing rotation of the motor shaft, the first mounting piece (10) and the first brake disc (9) when the brake assembly is in the second state.

9. An electric machine shaft brake arrangement according to claim 8, characterized in that: Second and third retainer rings (6 and 8) are arranged at both ends of the first bearing (7), and the second and third retainer rings (6 and 8) are used for limiting movement of the first bearing (7) along the vertical part (11).

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