Compact power system for electric vehicle

Abstract

The utility model relates to a compact power system for an electric vehicle, which comprises at least one motor and a worm gear matched with an output worm of the motor, and the worm gear is connected with at least one wheel of the electric vehicle. The motor is a brushless motor. According to the power system, the torque of the motor can be transmitted to the corresponding wheels only through one-stage transmission, namely matching of the output worm and the worm gear, the overall structure is simple, the size is small, the transmission effect is good, the size of the corresponding electric vehicle can be effectively reduced, and the power system is easy to store and more convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle power systems, and in particular relates to a compact power system for electric vehicles. Background Art

[0002] An electric vehicle is a vehicle that uses batteries as an energy source and converts electrical energy into mechanical motion through components such as controllers and motors. Such vehicles are widely used due to their convenience, low price, energy saving and environmental protection. Existing electric vehicles generally include electric bicycles, electric motorcycles, electric tricycles, electric cars, electric golf bag carts, etc. Among them, electric tricycles and electric cars are vehicles for transportation powered by batteries such as lithium batteries and driven by motors, while golf bag carts are used to carry golf bags containing golf clubs and other items. Electric golf bag carts powered by lithium batteries can use electric drive instead of manual labor, making them more convenient and labor-saving to use.

[0003] The existing power system for electric vehicles, including a motor and a reduction mechanism for transmitting the torque of the motor to the wheels, is large in size and complex in structure, which increases the size of the entire electric vehicle and cannot meet consumers' requirements for electric vehicles that are light and easy to store. Utility Model Content

[0004] The utility model aims to provide a compact power system for an electric vehicle to solve the problem of complex structure and large volume of the power system.

[0005] A compact power system for an electric vehicle of the utility model is implemented as follows:

[0006] A compact power system for an electric vehicle, comprising at least one motor, and a worm gear cooperating with an output worm of the motor, the worm gear being connected to at least one wheel of the electric vehicle;

[0007] The motor is a brushless motor.

[0008] Furthermore, the worm gear is drivingly connected to the corresponding wheel via a transmission shaft.

[0009] Furthermore, one motor is provided and is drivingly connected to two wheels.

[0010] Furthermore, two motors are arranged side by side, and each motor is drivingly connected to a corresponding wheel.

[0011] Furthermore, the core shaft of the worm gear is connected to the hub of the corresponding wheel.

[0012] Furthermore, it also includes a parking assembly arranged at the rear of the motor.

[0013] Furthermore, the parking assembly includes a friction plate connected to the output worm gear, and a brake pad capable of locking the friction plate.

[0014] Furthermore, a pin hole is provided on the output worm gear, and the friction plate is connected to the output worm gear by installing a pin in the pin hole.

[0015] Furthermore, the parking assembly also includes a brake stator, the brake pad is located on the inner side of the brake stator, the friction plate is installed on the side of the brake stator facing the brake pad, and a coil is wound inside the brake stator.

[0016] Furthermore, a return spring is installed on the side of the brake stator facing the brake pad.

[0017] Furthermore, a speed detection wheel that rotates synchronously with the at least one transmission shaft is mounted on at least one transmission shaft, and a speed detection element that cooperates with the speed detection wheel is disposed on one side of the speed detection wheel.

[0018] Furthermore, the power system is applied to an electric golf bag vehicle.

[0019] After adopting the above technical solution, the utility model has the following beneficial effects:

[0020] (1) The power system of the utility model can transmit the torque of the motor to the corresponding wheel through only one-stage transmission, that is, the cooperation between the output worm and the worm wheel. The overall structure is simple, the volume is small, the transmission effect is good, and the volume of the corresponding electric vehicle can be effectively reduced, which is easy to store and more convenient to use.

[0021] (2) The power system of the utility model uses a brushless motor. Compared with other motor structures, under the same power, the brushless motor has a smaller size, lighter weight, and longer life, which helps to reduce the size and weight of the entire power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a structural diagram of the compact power system for electric vehicles and wheels according to Embodiment 1 of the present utility model;

[0024] Figure 2 is a top view of the compact power system for an electric vehicle in accordance with Embodiment 1 of the present utility model in cooperation with a wheel;

[0025] Figure 3 yes Figure 2 Cross-section view in the AA direction;

[0026] Figure 4This is a structural diagram of the compact power system for electric vehicles and wheels according to Embodiment 2 of the present utility model;

[0027] Figure 5 is a top view of a compact power system for an electric vehicle in accordance with Embodiment 2 of the present utility model in cooperation with a wheel;

[0028] Figure 6 yes Figure 5 Cross-section along the middle BB direction;

[0029] Figure 7 yes Figure 6 Enlarged view of part E in the middle;

[0030] Figure 8 This is a structural diagram of the compact power system for electric vehicles and wheels according to Embodiment 3 of the present utility model;

[0031] Fig. 9 is a top view of a compact power system for an electric vehicle in accordance with Embodiment 3 of the present utility model in cooperation with a wheel;

[0032] Fig.10 The compact power system for electric vehicles of the utility model embodiment 3 is Fig. 9 Cross-sectional view in the mid-CC direction;

[0033] Fig.11 This is a structural diagram of a compact power system for an electric vehicle in accordance with Embodiment 4 of the present utility model in conjunction with a wheel;

[0034] Fig.12 is a rear view of a compact power system for an electric vehicle according to a fourth embodiment of the utility model;

[0035] Fig.13 yes Fig.12 Cross-section in the middle DD direction;

[0036] In the figure: motor 1, output worm 2, worm wheel 3, wheel 4, transmission shaft 5, transmission spindle 6, wheel axle 7, connecting pin 8, housing 9, speed detection wheel 10, speed detection element 11, friction plate 12, brake plate 13, pin hole 14, latch 15, brake stator 16, coil 17, annular groove bracket 18, bearing I 19, bearing II 20, bearing III 21, return spring 22, metal insert 23, pin rod 24, bearing IV 25, spindle 26, bearing V 27, connecting groove 28. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figure 1-3 As shown, a compact power system for an electric vehicle includes at least one motor 1 and a worm gear 3 matched with an output worm 2 of the motor 1, wherein the worm gear 3 is connected to at least one wheel 4 of the electric vehicle; the motor 1 is a brushless motor.

[0041] Compared with a brushed motor 1 of the same power, the brushless motor used in the present invention is smaller in size, thereby making the entire power system smaller in size and more compact in structure.

[0042] In order to realize transmission between the worm gear 3 and the corresponding wheel 4 , the worm gear 3 is connected to the corresponding wheel 4 via a transmission shaft 5 .

[0043] In this embodiment, one motor 1 is provided and is drivingly connected to two wheels 4 .

[0044] In this embodiment, an electric golf bag vehicle is taken as an example. The power system is located between the two wheels 4 of the electric golf bag vehicle. For example, the motor 1 is installed in the frame of the electric golf bag vehicle, and then the two wheels 4 are driven by a motor 1 in conjunction with a worm gear 3 and two transmission shafts 5.

[0045] In order to realize the transmission between the worm wheel 3 and the transmission shaft 5 , two transmission mandrels 6 are arranged inside the worm wheel 3 , and the outer ends of the transmission mandrels 6 are connected to the corresponding transmission shafts 5 .

[0046] Specifically, two transmission core shafts 6 are fixedly assembled in the inner hole of the wheel axle 7 of the worm gear 3, and are separated by a gasket. The outer end of each transmission core shaft 6 is connected to the corresponding transmission shaft 5 through a spline, and the outer end of the transmission shaft 5 is connected to the corresponding wheel hub 4 through a connecting pin 8.

[0047] The output worm 2 of the motor 1 drives the worm wheel 3 to rotate, and the worm wheel 3 drives the transmission shaft 5 and the corresponding wheel 4 to rotate.

[0048] The number of transmission shafts 5 is not limited to two. When a single motor 1 is driven, one transmission shaft 5 can also be set. Then, the transmission shaft 5 can directly pass through the inner hole of the wheel axle 7 of the worm gear 3 and be fixedly connected to the wheel axle 7, and the two ends of the transmission shaft 5 can be connected to the two wheels 4 respectively.

[0049] In order to protect the transmission components such as the worm gear 3 and the transmission shaft 5 , the power system further includes a housing 9 for accommodating the worm gear 3 and the transmission shaft 5 .

[0050] In this embodiment, the motor 1 is installed on one side of the housing 9 , and its output worm 2 extends into the housing 9 to mesh with the corresponding worm wheel 3 .

[0051] Specifically, the motor 1 is installed on the front side of the housing 9 and connected to the housing 9 by bolts. The output worm 2 extends into the housing 9 and is placed below or above the worm wheel 3. This arrangement makes it easier to place the motor 1 in the frame of the electric golf bag vehicle.

[0052] In addition, the wheel shaft 7 of the worm wheel 3 is matched with the housing 9 via a bearing I 19 , and the transmission shaft 5 is matched with the housing 9 via a bearing II 20 .

[0053] In order to facilitate the assembly of the worm wheel 3, the output worm 2 and the transmission shaft 5, the housing 9 is assembled by two oppositely arranged half-shells, and the two half-shells are detachably connected.

[0054] In this embodiment, the two half shells are arranged front and back and connected by bolts.

[0055] In order to detect the rotation speed of the motor 1 and the wheel 4 in real time, a rotation speed detection wheel 10 that rotates synchronously therewith is installed on at least one transmission shaft 5, and a rotation speed detection element 11 that cooperates with the rotation speed detection wheel 10 is provided on one side of the rotation speed detection wheel 10.

[0056] In this embodiment, a speed detection wheel 10 is installed on one of the transmission shafts 5 and can rotate synchronously with the transmission shaft 5 , and a speed detection element 11 cooperating with the speed detection wheel 10 is installed on the housing 9 at the rear side of the speed detection wheel 10 .

[0057] The speed detection wheel 10 may be a gear, and the speed detection element 11 may be a Hall sensor. However, the speed detection method is not limited to the combination of the gear and the Hall sensor.

[0058] When the electric golf bag cart is moving, the motor 1 is powered on and started, the output worm 2 of the motor 1 drives the worm wheel 3 to rotate, and the worm wheel 3 drives the two transmission shafts 5 to rotate synchronously with it, so as to drive the wheels 4, i.e. the electric golf bag cart.

[0059] Example 2

[0060] like Figure 4-7 As shown, based on the embodiment 1, this embodiment further provides a compact power system for an electric vehicle, the structure of which is substantially the same as that of the embodiment 1, except that:

[0061] The power system further comprises a parking assembly arranged at the rear of the motor 1 .

[0062] The provision of the parking component can increase the parking safety of the electric vehicle.

[0063] In order to achieve the parking effect, the parking assembly includes a friction plate 12 connected to the output worm 2 and a brake pad 13 capable of locking the friction plate 12 .

[0064] When the electric vehicle is driving, the output worm 2 can drive the friction plate 12 to rotate synchronously. When parking, the brake pad 13 moves toward the friction plate 12 and can lock the friction plate 12 to prevent it from rotating, so that the output worm 2 cannot rotate, thereby achieving the purpose of parking.

[0065] In order to realize the connection between the output screw and the friction plate 12 , a pin hole 14 is provided on the output worm 2 , and the friction plate 12 is connected to the output worm 2 by installing a pin 15 in the pin hole 14 .

[0066] Specifically, the inner hole of the friction plate 12 has two symmetrically arranged receiving notches that are connected to it. When the output worm 2 equipped with the latch 15 is engaged in the inner hole of the friction plate 12, the two ends of the latch 15 are located in the two receiving notches. When the output worm 2 rotates, the latch 15 can be used to drive the friction plate 12 to rotate synchronously.

[0067] In order to drive the brake pad 13 to lock the friction pad 12, the parking assembly also includes a brake stator 16. The brake pad 13 is located on the inner side of the brake stator 16. The friction pad 12 is installed on the side of the brake stator 16 facing the brake pad 13. A coil 17 is wound inside the brake stator 16.

[0068] Specifically, an annular cavity is provided in the brake stator 16 , an annular groove-shaped bracket 18 with an outward opening is provided in the annular cavity, and the coil 17 is wound in the annular groove-shaped bracket 18 .

[0069] One end of the inner hole of the brake stator 16 facing the brake pad 13 is a mounting cavity with an inner diameter larger than the inner hole, and the friction plate 12 is placed in the mounting cavity.

[0070] The end of the output worm 2 extends from the outer casing of the motor 1, passes through the brake pad 13 and the friction plate 12 in sequence, and then cooperates with the inner hole of the brake stator 16 through the bearing III 21, which can ensure the stability of the output worm 2 while preventing the brake stator 16 from rotating with the output worm 2.

[0071] When the coil 17 is energized, the brake stator 16 becomes a magnet with magnetic force, which attracts the brake pad 13, thereby clamping the friction plate 12 between the brake pad 13 and the brake stator 16, preventing the friction plate 12 and the output worm 2 from rotating.

[0072] In order to achieve the cooperation between the parking assembly and the motor 1 , the brake stator 16 is fixed on the housing of the motor 1 , and the end of the coil 17 is led out from the side of the brake stator 16 .

[0073] Specifically, the brake stator 16 is connected to the housing of the motor 1 by bolts, and the end of the coil 17 is led out from the brake stator 16 to facilitate connection with a power source.

[0074] In order to realize the inward movement and reset of the brake pad 13 when the parking is released, a reset spring 22 is installed on the side of the brake stator 16 facing the brake pad 13 .

[0075] Specifically, a mounting hole is provided on the side of the brake stator 16 facing the brake pad 13, and the return spring 22 is arranged in the mounting hole.

[0076] When the coil 17 is energized, the brake pad 13 moves toward the brake stator 16 and clamps the friction plate 12, which compresses the return spring 22. When the coil 17 is de-energized, the brake stator 16 loses its magnetic force, and the brake pad 13 moves inward under the elastic force of the return spring 22, that is, moves away from the brake stator 16 and returns to its original position, thereby releasing the parking state.

[0077] Preferably, a lug is disposed on the periphery of the brake pad 13 , and a slot that cooperates with the lug is disposed on a side of the brake stator 16 facing the brake pad 13 , and the lug is disposed opposite to the return spring 22 .

[0078] Among them, through the cooperation between the reset spring 22 and the corresponding lug, the brake pad 13 can be reset when the parking state is released; and through the cooperation between the slot and the lug, it can play a guiding function when the brake pad 13 moves, preventing the brake pad 13 from rotating with the output worm 2.

[0079] Example 3

[0080] like Figure 8-10As shown, based on the second embodiment, this embodiment further provides a compact power system for an electric vehicle, the structure of which is substantially the same as that of the first embodiment, except that:

[0081] The power system of this embodiment is provided with two motors 1 .

[0082] Specifically, two motors 1 are arranged side by side, and each motor 1 is drivingly connected to a corresponding wheel 4 .

[0083] Each motor 1 is matched with a worm gear 3 , each worm gear 3 is connected to a corresponding transmission shaft 5 , and the transmission shaft 5 drives a wheel 4 .

[0084] In order to ensure the stability of the fit between the worm wheel 3 and the transmission shaft 5 , a metal insert 23 is provided inside the worm wheel 3 , and the transmission shaft 5 is assembled in the inner hole of the corresponding metal insert 23 .

[0085] Since the transmission shaft 5 is fitted in the inner hole, a metal insert 23 with higher strength is required to ensure the stability of the fit between the two, and effectively reduce the deformation and vibration of the outer ring of the worm wheel 3, ensure the meshing accuracy of the worm wheel 3 and the output worm 2, and reduce operating noise.

[0086] Specifically, a pin rod 24 is installed on the transmission shaft 5 , and the pin rod 24 is matched in the embedding groove in the inner hole of the metal embedding block 23 , so that the corresponding transmission shaft 5 is driven to rotate through the metal embedding block 23 .

[0087] In this embodiment, the metal 23 insert is matched with the housing 9 through the bearing IV 25 , and the transmission shaft 5 is also matched with the housing 9 through the bearing II 20 .

[0088] The speed detection wheel 10 is disposed between the two motors 1 and fixed at the end of one of the transmission shafts 5 .

[0089] The above-mentioned embodiments 1-3 all arrange the power system between the two wheels 4, and are mainly applicable to electric vehicles such as electric tricycles with two rear wheels, electric scooters, electric cars, and electric golf bag cars.

[0090] Example 4

[0091] like Figure 11-13 As shown, this embodiment also provides a compact power system for an electric vehicle, the structure and working principle of the power system are roughly the same as those of the above embodiment, but its specific shape and installation position are different from those of embodiments 1-3:

[0092] Specifically, in this embodiment, the core shaft 26 of the worm gear 3 is connected to the hub of the corresponding wheel 4, that is, the power system is directly installed on the corresponding wheel 4, and there is no need to set a transmission shaft 5 for transmission.

[0093] The spindle 26 extends out of the housing and is directly connected to the corresponding wheel hub.

[0094] This installation method of the power system can be applied not only to two-wheeled electric vehicles such as electric bicycles and electric motorcycles, but also to electric vehicles such as electric tricycles with two rear wheels, electric scooters, electric cars, and electric golf bags.

[0095] This embodiment takes the four-wheeled golf bag vehicle in the electric golf bag vehicle as an example. The structural diagram of the shell 9 of the power system is different from that of embodiments 1-3. It includes a cavity for accommodating the output worm 2 and the worm wheel 3, and a support seat for supporting the motor 1. A connecting groove 28 is provided on the side of the shell 9 away from the wheel 4, and a connecting rod can be assembled on the connecting groove 28 to realize the connection between the power system and the frame of the electric golf bag vehicle.

[0096] As for ordinary two-wheeled electric bicycles or two-wheeled electric motorcycles, the connecting groove 28 or other connecting structures can also be used to connect with the frame of the corresponding electric vehicle.

[0097] In this embodiment, the structure and working principle of the parking assembly are substantially the same as those of the parking assembly in Embodiment 2, except that the parking assembly is arranged at the front end of the motor 1, that is, the output worm 2 is matched with the housing 9 through the bearing V27, and its front end is connected to the parking assembly. However, the parking assembly can also be arranged at the rear end of the motor 1 in the manner of Embodiment 2.

[0098] The power system of the utility model has a compact structure and a small size, which not only helps to reduce the size of the electric vehicle to meet consumers' requirements for electric vehicles to be light and easy to store, but also the installation position of the power system is not limited to the method disclosed in the above embodiment. Its installation position can be selected as needed. The advantages of small size and compact structure can increase the range of its optional installation position.

[0099] The power system disclosed in the utility model can be applied to various types of electric vehicles, such as electric bicycles, electric motorcycles, electric tricycles, electric scooters, electric cars and electric golf bag cars, and the power system, regardless of its shape and specifications, is within the scope of the power system protected by the utility model.

[0100] Based on the above-mentioned ideal embodiments of the present invention, any method of applying the above-mentioned power system to various types of electric vehicles should fall within the scope of protection of the present invention.

Claims

1. A compact power system for an electric vehicle, characterized in that: The electric vehicle comprises at least one motor (1), and a worm gear (3) matched with an output worm (2) of the motor (1), wherein the worm gear (3) is connected to at least one wheel (4) of the electric vehicle; The motor (1) is a brushless motor (1).

2. The compact power system for an electric vehicle according to claim 1, characterized in that: The worm gear (3) is transmission-connected to the corresponding wheel (4) via a transmission shaft (5).

3. The compact power system for an electric vehicle according to claim 2, characterized in that: The motor (1) is provided with one and is drivingly connected to two wheels (4).

4. The compact power system for an electric vehicle according to claim 2, characterized in that: Two motors (1) are arranged side by side, and each motor (1) is drivingly connected to a corresponding wheel (4).

5. The compact power system for an electric vehicle according to claim 1, characterized in that: The core shaft (26) of the worm wheel (3) is connected to the hub of the corresponding wheel (4).

6. The compact power system for an electric vehicle according to any one of claims 1 to 5, characterized in that: It also includes a parking assembly arranged at the rear of the motor (1).

7. The compact power system for an electric vehicle according to claim 6, characterized in that: The parking assembly comprises a friction plate (12) connected to the output worm (2), and a brake plate (13) capable of locking the friction plate (12).

8. The compact power system for an electric vehicle according to claim 7, characterized in that: The output worm (2) is provided with a pin hole (14), and the friction plate (12) is connected to the output worm (2) by installing a pin (15) in the pin hole (14).

9. The compact power system for an electric vehicle according to claim 7, characterized in that: The parking assembly also includes a brake stator (16), the brake pad (13) is located on the inner side of the brake stator (16), the friction plate (12) is installed on the side of the brake stator (16) facing the brake pad (13), and a coil (17) is wound inside the brake stator (16).

10. The compact power system for an electric vehicle according to claim 9, characterized in that: A return spring (22) is installed on the side of the brake stator (16) facing the brake pad (13).

11. The compact power system for an electric vehicle according to any one of claims 1 to 4, characterized in that: A rotation speed detection wheel (10) that rotates synchronously with at least one transmission shaft (5) is mounted on one side of the rotation speed detection wheel (10), and a rotation speed detection element (11) that cooperates with the rotation speed detection wheel (10) is disposed on one side of the rotation speed detection wheel (10).

12. The compact power system for an electric vehicle according to any one of claims 1 to 5, characterized in that: The power system is applied to an electric golf bag vehicle.

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