Electric automobile hub motor overload protection device

Abstract

The utility model relates to the technical field of electric automobile hub motors, in particular to an overload protection device for an electric automobile hub motor. According to the technical scheme, the hub motor comprises a hub motor body and a wire fixedly installed on one side of the hub motor body, the hub motor body is provided with an installation assembly and a protection assembly, the installation assembly comprises two limiting frames fixedly installed on the outer side of the wire, and the tops of the two limiting frames are fixedly connected with a protection box; a first fixing frame and a second fixing frame are fixedly connected to the inner side of the protection box, a first supporting plate is fixedly installed on the inner side of the first fixing frame, and a second supporting plate is fixedly connected to the inner side of the second fixing frame. According to the utility model, through the mutual cooperation of the limiting frame, the first fixing frame, the second fixing frame, the fixing box, the guide rod and the movable block, the protection box can be conveniently mounted and dismounted, and overload protection can be conveniently carried out on the hub motor body.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle hub motors, in particular to an electric vehicle hub motor overload protection device. Background Art

[0002] The hub motor technology is also known as the in-wheel motor technology. Its biggest feature is that the power unit, transmission unit and braking unit are all integrated into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. During the use of the hub motor, it is easy to be damaged by overload due to large current or power. The hub motor needs to be overload protected, and the electric vehicle hub motor overload protection device needs to be used.

[0003] In the prior art, there are the following problems:

[0004] The driving modes of hub motors are divided into two categories: reduction drive and direct drive. The driving mechanism of direct drive hub motors is simpler and more compact, the axial size is also reduced, and the driving efficiency is relatively high. However, direct drive hub motors are not convenient for overload protection, which makes the hub motors prone to overload damage due to the influence of current or power. At the same time, traditional hub motor overload protection devices are all set inside the hub motors, which is not convenient for disassembly and installation of the overload protection devices. Utility Model Content

[0005] The purpose of the utility model is to provide an electric vehicle hub motor overload protection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric vehicle wheel hub motor overload protection device, comprising a wheel hub motor body and a wire fixedly installed on one side of the wheel hub motor body, the wheel hub motor body is provided with a mounting assembly and a protection assembly, the mounting assembly comprises two limit frames fixedly installed on the outside of the wire, a protection box is fixedly connected to the top of the two limit frames, a first fixing frame and a second fixing frame are fixedly connected to the inner side of the protection box, a first support plate is fixedly installed on the inner side of the first fixing frame, a second support plate is fixedly connected to the inner side of the second fixing frame, and the protection assembly comprises a spring fixedly installed on one side of the first support plate A frame, one side of the second support plate is fixedly connected to a fixing plate, the spring frame and the fixing plate both extend into the protection box, one end of the spring frame contacts with the bottom of the fixing plate, a fixing box is fixedly installed inside the protection box, the fixing box is located below the first fixing frame, a slider is movably installed on the inner side of the fixing box, one side of the slider is fixedly connected to a guide rod extending from the fixing box, the inner side of the fixing box is filled with a water source, the water source is located on the other side of the slider, a movable block is movably installed on the inner side of the protection box, the movable block is located on one side of the fixing box, the spring frame is fixed to the movable block by a fixing sleeve, and the guide rod passes through the movable block and is slidably installed with the movable block.

[0007] The protection box can be installed and fixed on the wire through the limit frame. By cutting off the current transmission line in the wire and fixing the cut ends in the first fixing frame and the second fixing frame respectively, the protection box can be conveniently installed and fixed, and the protection box can be conveniently installed and removed. The current is transmitted to the spring frame through the first support plate, and then the current is transmitted through the fixing plate and the second support plate. When the current or power is large, the spring frame generates high heat. By transferring the heat to the fixing box, the water source absorbs the heat and expands, and then the slider is pushed to drive the guide rod to move to the right, and the movable block is driven downward by the inclination angle of the guide rod, and the fixed sleeve is driven downward synchronously, so that one end of the spring frame is separated from the fixed plate, and the hub motor body can be powered off and overloaded. When the temperature in the fixing box is low, the water source is caused to shrink, and the slider and the guide rod can be driven to move to the left, and the movable block and the fixed sleeve can be driven to move and reset synchronously, so that one end of the spring frame can be in contact with the fixed plate, and the current transmission is restored when the temperature is lowered, and the current transmission is disconnected when the temperature is too high.

[0008] Preferably, a movable frame is fixedly installed at the bottom of each of the limit frames, the movable frame is located outside the wire, and each of the movable frame and the limit frame are fixedly installed by two fixing bolts. The limit frame and the movable frame are clamped on the outside of the wire, the movable frame is aligned with the limit frame, and then the movable frame and the limit frame are fixed by the fixing bolts, so that the protection box can be installed and fixed on the wire.

[0009] Preferably, movable plates are movably mounted on the inner sides of the first fixing frame and the second fixing frame, and the two movable plates are respectively located above the first support plate and the second support plate, and adjusting bolts are rotatably mounted on the tops of the two movable plates, and the two adjusting bolts extend out of the top of the protection box and engage with the protection box. By cutting the current transmission line in the wire, and then inserting the cut ends into the first fixing frame and the second fixing frame respectively, the movable plate can be pushed downward by rotating the adjusting bolt, and the first support plate and the second support plate can be used to conveniently clamp and fix the two ends of the line.

[0010] Preferably, a heat conducting plate is fixedly mounted on the inner side of the fixing box, the heat conducting plate is located above the slider, and the heat conducting plate extends out of the top of the fixing box. The heat emitted by the spring clip can be transferred to the fixing box through the heat conducting plate.

[0011] Preferably, two sliding frames are fixedly installed inside the protection box, the two sliding frames are respectively located at the front and rear sides of the movable block, and the movable block is slidably installed between the two sliding frames. The movable block can be limitedly slid by the sliding frames to prevent the movable block from tilting or moving left and right.

[0012] Preferably, a support rod is fixedly installed on the top of the movable block, the fixed sleeve is fixedly connected to the top of the support rod, and an insulating sleeve is provided on the inner side of the fixed sleeve. The fixed sleeve can be supported and fixed by the support rod, and the spring frame and the fixed sleeve can be insulated by the insulating sleeve.

[0013] The present invention provides an electric vehicle wheel hub motor overload protection device. Compared with the prior art, the present invention has the following beneficial effects: by setting the mutual cooperation between the limiting frame, the first fixing frame, the second fixing frame, the fixing box, the guide rod and the movable block, the limiting frame can be used to install and fix the protection box on the wire, by cutting off the current transmission line in the wire, and fixing the cut ends in the first fixing frame and the second fixing frame respectively, the protection box can be conveniently installed and fixed, and the protection box can be conveniently installed and disassembled, the spring frame is used to contact with the fixing plate to transmit the current, when the current or power is large, the spring frame generates high heat, and the heat is transferred to the fixing box by the heat conduction plate, and then the slider is pushed to drive the guide rod to move rightward, and the movable block is driven to move downward by the inclination angle of the guide rod, so that the movable block drives one end of the spring frame to separate from the fixing plate, the wheel hub motor body can be powered off and the wheel hub motor body can be conveniently protected from overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2This is a schematic diagram of the protective box of the utility model when viewed from above;

[0016] Figure 3 This is a schematic diagram of the cutaway structure of the protection box of the utility model;

[0017] Figure 4 It is a schematic diagram of the cutaway structure of the fixing box of the utility model;

[0018] Figure 5 It is a schematic diagram of the cutaway structure of the movable block of the utility model.

[0019] In the figure: 1. hub motor body; 2. wire; 3. protection box; 4. limit frame; 5. movable frame; 6. fixing bolt; 7. fixing box; 8. heat conducting plate; 9. guide rod; 10. sliding frame; 11. movable block; 12. support rod; 13. fixing sleeve; 14. first fixing frame; 15. spring frame; 16. second fixing frame; 17. fixing plate; 18. first support plate; 19. second support plate; 20. movable plate; 21. adjusting bolt; 22. slider; 23. water source; 24. insulating sleeve. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The utility model provides Figure 1-5 The electric vehicle wheel hub motor overload protection device shown in the figure comprises a wheel hub motor body 1 and a wire 2 fixedly installed on one side of the wheel hub motor body 1, the wheel hub motor body 1 is provided with a mounting assembly and a protection assembly, the mounting assembly comprises two limit frames 4 fixedly installed on the outside of the wire 2, a protection box 3 is fixedly connected to the top of the two limit frames 4, a first fixing frame 14 and a second fixing frame 16 are fixedly connected to the inner side of the protection box 3, a first support plate 18 is fixedly installed on the inner side of the first fixing frame 14, a second support plate 19 is fixedly connected to the inner side of the second fixing frame 16, the protection assembly comprises a spring frame 15 fixedly installed on one side of the first support plate 18, and a side of the second support plate 19 is fixedly connected to the spring frame 15. A fixing plate 17 is connected, and the spring frame 15 and the fixing plate 17 both extend into the protection box 3, one end of the spring frame 15 contacts the bottom of the fixing plate 17, a fixing box 7 is fixedly installed inside the protection box 3, the fixing box 7 is located below the first fixing frame 14, a slider 22 is movably installed inside the fixing box 7, one side of the slider 22 is fixedly connected with a guide rod 9 extending from the fixing box 7, the inside of the fixing box 7 is filled with a water source 23, the water source 23 is located on the other side of the slider 22, a movable block 11 is movably installed inside the protection box 3, the movable block 11 is located on one side of the fixing box 7, the spring frame 15 and the movable block 11 are fixed by a fixing sleeve 13, and the guide rod 9 passes through the movable block 11 and is slidably installed with the movable block 11;

[0022] A movable frame 5 is fixedly installed at the bottom of each limit frame 4, and the movable frame 5 is located outside the wire 2. Each movable frame 5 is fixed to the limit frame 4 by two fixing bolts 6.

[0023] A movable plate 20 is movably mounted on the inner side of the first fixing frame 14 and the second fixing frame 16. The two movable plates 20 are respectively located above the first supporting plate 18 and the second supporting plate 19. Adjustment bolts 21 are rotatably mounted on the top of the two movable plates 20. The two adjustment bolts 21 extend out of the top of the protection box 3 and engage with the protection box 3.

[0024] A heat conducting plate 8 is fixedly mounted on the inner side of the fixing box 7. The heat conducting plate 8 is located above the slider 22 and extends out of the top of the fixing box 7.

[0025] Two sliding frames 10 are fixedly installed inside the protection box 3. The two sliding frames 10 are respectively located at the front and rear sides of the movable block 11. The movable block 11 is slidably installed between the two sliding frames 10.

[0026] A support rod 12 is fixedly installed on the top of the movable block 11 , a fixed sleeve 13 is fixedly connected to the top of the support rod 12 , and an insulating sleeve 24 is provided to connect the inner side of the fixed sleeve 13 .

[0027] The working principle of the electric vehicle hub motor overload protection device according to the embodiment is: the limiting frame 4 is clamped on the outside of the wire 2, and then the movable frame 5 is aligned with the limiting frame 4, and the movable frame 5 and the limiting frame 4 are fixed by the fixing bolt 6, so that the protection box 3 can be installed and fixed on the wire 2;

[0028] By cutting off the current transmission line in the wire 2, inserting the cut ends into the first fixing frame 14 and the second fixing frame 16 respectively, and by rotating the adjusting bolt 21, pushing the movable plate 20 to move downward, the first supporting plate 18 and the second supporting plate 19 can be used to squeeze and fix the two ends of the current transmission circuit, which can facilitate the installation and fixation of the protection box 3, and facilitate the installation and removal of the protection box 3;

[0029] The current is transmitted to the spring frame 15 through the first support plate 18, and then the current is transmitted through the fixed plate 17 and the second support plate 19. When the current or power is large, the spring frame 15 generates high heat, and the heat is transferred to the fixed box 7 by the heat conducting plate 8, so that the water source 23 absorbs the heat and expands, and then the slider 22 is pushed to drive the guide rod 9 to move rightward, and the movable block 11 is driven to move downward by the inclination angle of the guide rod 9, and the fixed sleeve 13 is driven to move downward synchronously, so that one end of the spring frame 15 is separated from the fixed plate 17, so that the hub motor body 1 can be powered off and overload protection can be conveniently performed on the hub motor body 1;

[0030] When the temperature in the fixed box 7 is low, the water source 23 will shrink, which can drive the slider 22 and the guide rod 9 to move to the left, and synchronously drive the movable block 11 and the fixed sleeve 13 to move and reset, so that one end of the spring frame 15 can contact with the fixed plate 17, and the current transmission will be restored when the temperature drops, and the current transmission will be disconnected when the temperature is too high. The first support plate 18, the spring frame 15, the fixed plate 17 and the second support plate 19 are made of metal conductive material. The spring frame 15 will generate higher heat when receiving too high current.

[0031] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. An electric vehicle wheel hub motor overload protection device, comprising a wheel hub motor body (1) and a wire (2) fixedly mounted on one side of the wheel hub motor body (1), characterized in that: The hub motor body (1) is provided with a mounting assembly and a protection assembly; The installation assembly comprises two limit frames (4) fixedly installed on the outside of the wire (2), the tops of the two limit frames (4) are fixedly connected to a protection box (3), the inner side of the protection box (3) is fixedly connected to a first fixing frame (14) and a second fixing frame (16), the inner side of the first fixing frame (14) is fixedly installed with a first support plate (18), and the inner side of the second fixing frame (16) is fixedly connected with a second support plate (19); The protection assembly comprises a spring frame (15) fixedly mounted on one side of a first support plate (18); a fixing plate (17) is fixedly connected to one side of the second support plate (19); the spring frame (15) and the fixing plate (17) both extend into the protection box (3); one end of the spring frame (15) contacts the bottom of the fixing plate (17); a fixing box (7) is fixedly mounted inside the protection box (3); the fixing box (7) is located below the first fixing frame (14); a slider (22) is movably mounted on the inner side of the fixing box (7) A guide rod (9) extending from a fixed box (7) is fixedly connected to one side of the slider (22); a water source (23) is filled inside the fixed box (7); the water source (23) is located on the other side of the slider (22); a movable block (11) is movably installed inside the protection box (3); the movable block (11) is located on one side of the fixed box (7); the spring frame (15) and the movable block (11) are fixed by a fixed sleeve (13); the guide rod (9) passes through the movable block (11) and is slidably installed with the movable block (11).

2. The electric vehicle hub motor overload protection device according to claim 1, characterized in that: A movable frame (5) is fixedly mounted at the bottom of each of the limiting frames (4); the movable frame (5) is located outside the wire (2); and each of the movable frames (5) is fixedly mounted to the limiting frame (4) via two fixing bolts (6).

3. The electric vehicle hub motor overload protection device according to claim 1, characterized in that: A movable plate (20) is movably mounted on the inner side of the first fixing frame (14) and the second fixing frame (16); the two movable plates (20) are respectively located above the first supporting plate (18) and the second supporting plate (19); an adjusting bolt (21) is rotatably mounted on the top of the two movable plates (20); the two adjusting bolts (21) extend out of the top of the protection box (3) and engage with the protection box (3).

4. The electric vehicle hub motor overload protection device according to claim 1, characterized in that: A heat conducting plate (8) is fixedly mounted on the inner side of the fixing box (7), the heat conducting plate (8) is located above the sliding block (22), and the heat conducting plate (8) extends out of the top of the fixing box (7).

5. The electric vehicle hub motor overload protection device according to claim 1, characterized in that: Two sliding frames (10) are fixedly installed inside the protection box (3), and the two sliding frames (10) are respectively located at the front side and the rear side of the movable block (11), and the movable block (11) is slidably installed between the two sliding frames (10).

6. The electric vehicle hub motor overload protection device according to claim 1, characterized in that: A support rod (12) is fixedly mounted on the top of the movable block (11), the fixed sleeve (13) is fixedly connected to the top of the support rod (12), and an insulating sleeve (24) is fixedly connected to the inner side of the fixed sleeve (13).

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