Electric vehicle brake device

Abstract

The application relates to an electric vehicle brake device which comprises a mounting support, a contact switch and a handle assembly; the handle assembly comprises a rotating shaft rotatably mounted on the mounting support, a rotating cam sleeved on the upper end of the rotating shaft and provided with one end, and a brake handle fixed to the rotating shaft and used for coaxially driving the rotating cam to rotate; the brake handle has an initial position and a brake position; when the brake handle is in the initial position, the rotating cam abuts against the triggering end of the contact switch, so that the driving power source keeps in a connected state; when the brake handle is in the brake position, the brake handle coaxially drives the rotating cam to rotate, so that the rotating cam is separated from the triggering end of the contact switch, the contact switch is disconnected, and the driving power source is cut off. The application has the effect of improving the problem that the electric vehicle cannot start the power source due to the failure of the electromagnetic brake device.

Description

Technical Field

[0001] This application relates to the field of vehicle braking and circuit control, and in particular to a braking device for an electric vehicle. Background Technology

[0002] In the field of electric vehicles, with the improvement of people's living standards and the increasing demand for convenient travel, electric vehicles have been widely used as an environmentally friendly and convenient means of transportation. In related technologies, braking is required in emergency situations while the electric vehicle is in motion. Electric vehicle brake levers are typically equipped with electromagnetic braking devices. When the brake lever is pressed, the electromagnetic braking device is activated first, disconnecting the power supply to the vehicle's rotation, and then the brakes are engaged. These electromagnetic braking devices mainly rely on the principle of electromagnetic induction, i.e., a coil energized to generate a magnetic field, thus requiring an additional current to drive it. Regarding the aforementioned technologies, the inventors believe that during prolonged use, the electromagnetic braking device may malfunction or break down, resulting in the electric vehicle having no starting power. Utility Model Content

[0003] In order to improve the problem of electric vehicles being unable to start due to electromagnetic braking device failure, this application provides an electric vehicle braking device.

[0004] The electric vehicle braking device provided in this application adopts the following technical solution:

[0005] An electric vehicle braking device includes a mounting bracket, a contact switch mounted on the mounting bracket and connected to the electric vehicle's drive power supply, and a handle assembly rotatably mounted on the mounting bracket and cooperating with the contact switch. The handle assembly includes a rotating shaft rotatably mounted on the mounting bracket, a rotating cam sleeved on the upper end of the rotating shaft and at one end, and a brake handle fixed to the rotating shaft and used to drive the rotating cam to rotate coaxially. The brake handle has an initial position and a braking position. When the brake handle is in the initial position, the rotating cam abuts against the trigger end of the contact switch, keeping the drive power supply connected. When the brake handle is in the braking position, the brake handle drives the rotating cam to rotate coaxially, causing the rotating cam to separate from the trigger end of the contact switch, the contact switch to open, and the drive power supply to be cut off.

[0006] By adopting the above technical solution, when the electric vehicle is driving normally, the rotating cam abuts against the trigger end of the contact switch, and the drive power supply remains connected; when emergency braking is required, the operator rotates the brake handle and drives the rotating cam to rotate coaxially, so that the rotating cam separates from the trigger end of the contact switch, the contact switch is disconnected, and the drive power supply is cut off; since the contact switch does not require additional current to drive, the problem of the electric vehicle being unable to start due to the failure of the electromagnetic brake device is improved.

[0007] Optionally, the contact switch is a mechanical switch, the rotating cam has a trigger protrusion for triggering the opening and closing of the contact switch, and the contact switch has a limiting surface at one end near the rotating cam for the trigger protrusion to abut against.

[0008] By adopting the above technical solution and using a mechanical switch as the contact switch, the opening and closing of the contact switch can be reliably realized by utilizing the cooperation between the trigger protrusion of the rotating cam and the contact switch contact surface, thereby stably controlling the connection and disconnection of the drive power supply.

[0009] Optionally, the contact switch is a Hall switch, which has a Hall element arranged in series with the driving power supply, and the rotating cam is provided with a trigger element that cooperates with the Hall element.

[0010] By adopting the above technical solution, using a Hall switch as a contact switch, and cooperating with the trigger element and Hall element on the trigger protrusion, the on-off control of the drive power supply is realized by utilizing the Hall sensing principle, which can improve the sensitivity and stability of the control and help reduce the problem of poor contact caused by mechanical wear.

[0011] Optionally, the rotating cam has an arrangement hole that extends through the inner and outer surfaces and is used for insertion of the rotating shaft, and the upper end of the rotating shaft has a mounting post that mates with the arrangement hole.

[0012] By adopting the above technical solution, the rotating cam is installed on the rotating shaft by the cooperation of the arrangement hole and the mounting column, ensuring that the rotating cam and the rotating shaft are installed coaxially. This allows the brake handle to stably drive the rotating cam to rotate coaxially, thereby more reliably controlling the on and off of the contact switch and realizing the connection and disconnection of the drive power supply.

[0013] Optionally, the mounting column has a positioning plane, and the rotating cam has a planar structure on the side wall of the arrangement hole that cooperates with the positioning plane.

[0014] By adopting the above technical solution, the positioning plane of the mounting column matches the planar structure of the side wall of the rotating cam arrangement hole, thereby realizing the positioning and installation of the rotating cam and the rotating shaft, which helps to improve the stability of the brake handle driving the rotating cam to rotate coaxially.

[0015] Optionally, the number of positioning planes is two and they are symmetrically arranged on the side wall of the mounting column, and the rotating cam has a planar structure that mates with the two positioning planes one by one.

[0016] By adopting the above technical solution, the two symmetrically arranged positioning planes on the side wall of the mounting column cooperate with the corresponding planar structures on the rotating cam, ensuring the coaxiality of the rotating cam and the rotating shaft. This helps to further improve the stability of the brake lever driving the rotating cam to rotate coaxially.

[0017] Optionally, the brake handle includes a rotating part, a driving part connected to the rotating part and extending away from the contact switch, and an abutting part connected to the rotating part and engaging with the mounting bracket; the rotating part has a driving hole for arranging the rotating shaft; the mounting bracket has an arrangement groove for rotatably arranging the rotating part and the abutting part; the bottom of the arrangement groove has an abutting surface for the abutting part to abut against.

[0018] By adopting the above technical solution, the specific structure of the brake handle is disclosed, including the structural design of the rotating part, driving part and abutting part of the brake handle. The maximum rotation angle of the brake handle is limited by the arrangement groove of the mounting bracket and the abutting surface, so that the brake handle can rotate stably on the mounting bracket, realizing the smooth switching of the brake handle between the initial position and the braking position, thereby ensuring the accurate and reliable connection and disconnection of the drive power supply.

[0019] Optionally, an elastic structure is provided between the rotating part and the mounting bracket for driving the brake handle to reset from the brake position to the initial position.

[0020] By adopting the above technical solution, after the braking operation is completed, the elastic structure can drive the brake handle to return from the braking position to the initial position, which improves the ease of use and operating efficiency of the braking device.

[0021] Optionally, the elastic structure includes a mounting block that slides horizontally on the mounting bracket, a support spring that is arranged at the bottom of the mounting block and drives the mounting block to move toward the side closer to the rotating part, and a connecting rod hinged between the mounting block and the rotating part; the mounting bracket has a mounting groove at the bottom of the arrangement groove for arranging the support spring and the mounting block.

[0022] By adopting the above technical solution, the specific structure of the elastic structure is disclosed. The support spring drives the mounting block to move towards the side closer to the rotating part, and the connecting rod drives the rotating part to rotate, so that the brake handle can be smoothly reset from the brake position to the initial position, realizing the automatic reset function of the brake handle.

[0023] Optionally, the rotating part has a positioning hole on its side, which is arranged along the axis perpendicular to the driving hole and communicates with the driving hole, and the rotating shaft has a tapered hole that mates with the positioning hole.

[0024] By adopting the above technical solution, a positioning hole that communicates with the drive hole and is perpendicular to its axis is opened on the side of the rotating part, and the rotating shaft has a tapered hole that matches the positioning hole, so as to achieve precise positioning of the rotating shaft and the rotating part, further ensuring the coaxial rotation of the brake handle and the rotating shaft, which helps to improve the stability and reliability of the braking device.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. An electric vehicle braking device, comprising a mounting bracket, a contact switch, and a handle assembly; when the electric vehicle is in normal operation, a rotating cam abuts against the trigger end of the contact switch, and the drive power supply remains connected; when emergency braking is required, the operator rotates the brake handle and drives the rotating cam to rotate coaxially, causing the rotating cam to separate from the trigger end of the contact switch, the contact switch to open, and the drive power supply to be cut off; since the contact switch does not require additional current to drive it, the problem of the electric vehicle being unable to start due to a malfunction of the electromagnetic braking device is improved;

[0027] 2. A mechanical switch is used as the contact switch. By utilizing the cooperation between the trigger protrusion of the rotating cam and the contact switch abutment surface, the opening and closing of the contact switch can be reliably realized, thereby stably controlling the connection and disconnection of the drive power supply.

[0028] 3. Using a Hall switch as a contact switch, in conjunction with the trigger element and Hall element on the trigger protrusion, the on / off control of the drive power supply is realized by utilizing the Hall sensing principle, which can improve the sensitivity and stability of the control and help reduce contact problems caused by mechanical wear. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the electric vehicle braking device in Example 1.

[0030] Figure 2 This is a schematic diagram of the installation of the mounting bracket and brake handle in embodiment 1.

[0031] Figure 3 yes Figure 2 Enlarged schematic diagram of the positioning hole at point A.

[0032] Figure 4 This is a schematic cross-sectional view of the rotating shaft along its length in embodiment 1.

[0033] Figure 5 This is a schematic diagram of the interaction between the contact switch and the rotating cam in embodiment 1.

[0034] Figure 6 This is a schematic diagram of the rotating cam in Embodiment 1.

[0035] Figure 7 yes Figure 5 A schematic diagram showing the fit between the stationary contact at point B and the conductive contact.

[0036] Figure 8 This is a schematic diagram of the interaction between the Hall element and the trigger element in Embodiment 2.

[0037] Explanation of reference numerals in the attached drawings: 1. Mounting bracket; 11. Arrangement slot; 111. First rotating hole; 112. Second rotating hole; 113. Limiting surface; 12. Mounting slot; 2. Contact switch; 21. Mounting housing; 22. Conductive terminal; 221. Stationary contact; 23. Button component; 231. Conductive contact piece; 232. Abutting surface; 24. First spring; 25. Hall element; 3. Handle assembly; 31. Rotating shaft; 311. Mounting column; 3111. Positioning plane; 312. Tapered hole; 32. Rotating cam; 321. Mounting part; 3211. Arrangement hole; 322. Trigger protrusion; 323. Sensing slot; 324. Trigger element; 33. Brake handle; 331. Rotating part; 3311. Drive hole; 3312. Positioning hole; 332. Drive part; 333. Abutting part; 41. Mounting block; 42. Connecting rod; 43. Support spring. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0039] This application discloses a braking device for an electric vehicle. (Refer to...) Figure 1 The electric vehicle braking device includes a mounting bracket 1, a contact switch 2 mounted on the mounting bracket 1 and connected to the electric vehicle's drive power supply, and a handle assembly 3 rotatably mounted on the mounting bracket 1 and cooperating with the contact switch 2. The handle assembly 3 includes a rotating shaft 31 rotatably mounted on the mounting bracket 1, a rotating cam 32 sleeved on the upper end of the rotating shaft 31, and a brake handle 33 fixed to the rotating shaft 31 and used to drive the rotating cam 32 to rotate coaxially.

[0040] Reference Figure 2 and Figure 3 The brake lever 33 includes a rotating part 331, a driving part 332 connected to the rotating part 331 and extending away from the contact switch 2, and an abutting part 333 connected to the rotating part 331 and engaging with the mounting bracket 1. The rotating part 331 has a driving hole 3311 for accommodating a rotating shaft 31. A positioning hole 3312 is provided on the side of the rotating part 331, which is arranged perpendicular to the axis of the driving hole 3311 and communicates with the driving hole 3311. The rotating shaft 31 has a tapered hole 312 for positioning in conjunction with the positioning hole 3312.

[0041] Reference Figure 2 and Figure 4The mounting bracket 1 has an arrangement groove 11 for rotatably arranging the rotating part 331 and the abutting part 333. The arrangement groove 11 has a first rotation hole 111 on the side near the contact switch 2 for rotatably arranging one end of the rotating shaft 31, and a second rotation hole 112 on the side away from the contact switch 2 for rotatably arranging the other end of the rotating shaft 31. The bottom of the arrangement groove 11 has a limiting surface 113 for the end of the abutting part 333 to abut against. The mounting bracket 1 is provided with an elastic structure for connecting to the rotating part 331 and driving the brake handle 33 to reset. The mounting bracket 1 has a mounting groove 12 at the bottom of the arrangement groove 11. The elastic structure includes a mounting block 41 arranged in the mounting groove 12 near one end of the arrangement groove 11, a connecting rod 42 hinged between the outer end of the mounting block 41 and the rotating part 331, and a support spring 43 arranged at the bottom of the mounting groove 12. One end of the support spring 43 abuts against the bottom of the mounting groove 12 and the other end abuts against the inner end of the mounting block 41, so that the mounting block 41 always has the tendency to push the connecting rod 42 toward the side away from the arrangement groove 11.

[0042] Reference Figure 5 and Figure 6 The rotating cam 32 includes a mounting portion 321 and a trigger protrusion 322 for triggering the opening and closing of the contact switch 2. The mounting portion 321 has an arrangement hole 3211 that penetrates the inner and outer surfaces and is used for insertion of the rotating shaft 31. The upper end of the rotating shaft 31 has a mounting post 311 that mates with the arrangement hole 3211. The mounting post 311 has a positioning plane 3111 arranged along the length of the rotating shaft 31 and used to limit the rotation of the rotating cam 32. The rotating cam 32 has a planar structure on the side wall of the arrangement hole 3211 that mates with the positioning plane 3111. There are two positioning planes 3111, which are symmetrically arranged on the side wall of the mounting post 311, and the rotating cam 32 has a planar structure that mates with each of the two positioning planes 3111.

[0043] Reference Figure 5 and Figure 7 The contact switch 2 is a mechanical switch. The contact switch 2 includes a mounting housing 21, a conductive terminal 22 disposed within the mounting housing 21 and connected to a driving power supply, a button 23 slidably disposed within the mounting housing 21, and a first spring 24 driving the button 23 to move away from the conductive terminal 22. The conductive terminal 22 has a stationary contact 221 on the side facing the button, and the button 23 has a conductive contact piece 231 at its bottom end that mates with the stationary contact 221. The button 23 has an abutting surface 232 at the end near the rotating cam 32 for the trigger protrusion 322 to abut against. In this embodiment, the mounting housing 21 is made of insulating plastic, and the abutting surface 232 is made of a rubber material with good elasticity.

[0044] The brake handle 33 has an initial position and a braking position. When the brake handle 33 is in the initial position, the trigger protrusion 322 abuts against the abutment surface 232, so that the conductive contact 231 in the contact switch 2 abuts against the stationary contact 221, and the drive power supply remains connected. When the brake handle 33 is in the braking position, the brake handle 33 drives the rotating cam 32 to rotate coaxially, so that the trigger protrusion 322 separates from the abutment surface 232, the conductive contact 231 separates from the stationary contact 221, the contact switch 2 is disconnected, and the drive power supply is cut off.

[0045] The implementation principle of an electric vehicle braking device according to an embodiment of this application is as follows: When the electric vehicle is driving normally, the trigger protrusion 322 abuts against the abutment surface 232, so that the conductive contact 231 in the contact switch 2 abuts against the stationary contact 221, and the driving power supply remains connected; when emergency braking is required, the operator rotates the brake handle 33 and drives the rotating cam 32 to rotate coaxially, so that the trigger protrusion 322 separates from the abutment surface 232, the conductive contact 231 separates from the stationary contact 221, the contact switch 2 is disconnected, and the driving power supply is cut off; since the contact switch 2 does not require additional current to drive, the problem of the electric vehicle being unable to start due to the failure of the electromagnetic braking device is improved.

[0046] Example 2

[0047] Except for the different cooperation structure between the contact switch 2 and the rotating cam 32 compared to Embodiment 1, the rest of the structure of this embodiment is the same as the electric vehicle braking device in Embodiment 1.

[0048] Reference Figure 8 The contact switch 2 is a Hall switch. A Hall element 25, which is connected in series with the drive power supply, is installed inside the button 23. A sensing groove 323 is provided on the side of the trigger protrusion 322 of the rotating cam 32, and a trigger element 324 that cooperates with the Hall element 25 is arranged in the sensing groove 323.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A braking device for an electric vehicle, characterized in that, The device includes a mounting bracket (1), a contact switch (2) mounted on the mounting bracket (1) and connected to the drive power supply of the electric vehicle, and a handle assembly (3) rotatably mounted on the mounting bracket (1) and cooperating with the contact switch (2); the handle assembly (3) includes a rotating shaft (31) rotatably mounted on the mounting bracket (1), a rotating cam (32) sleeved on the upper end of the rotating shaft (31) and at one end, and a brake handle (33) fixed to the rotating shaft (31) and used to drive the rotating cam (32) to rotate coaxially. The brake handle (33) has an initial position and a braking position. When the brake handle (33) is in the initial position, the rotating cam (32) abuts against the trigger end of the contact switch (2), so that the driving power supply remains connected. When the brake handle (33) is in the braking position, the brake handle (33) drives the rotating cam (32) to rotate coaxially, so that the rotating cam (32) separates from the trigger end of the contact switch (2), the contact switch (2) is disconnected, and the driving power supply is cut off.

2. The electric vehicle braking device according to claim 1, characterized in that, The contact switch (2) is a mechanical switch. The rotating cam (32) has a trigger protrusion (322) for triggering the opening and closing of the contact switch (2). The contact switch (2) has an abutment surface (232) at one end near the rotating cam (32) for the trigger protrusion (322) to abut against.

3. The electric vehicle braking device according to claim 1, characterized in that, The contact switch (2) is a Hall switch, and the contact switch (2) has a Hall element (25) arranged in series with the driving power supply. The rotating cam (32) is provided with a trigger (324) that cooperates with the Hall element (25).

4. The electric vehicle braking device according to claim 1, characterized in that, The rotating cam (32) has an arrangement hole (3211) that extends through the inner and outer surfaces and is used for insertion of the rotating shaft (31). The upper end of the rotating shaft (31) has a mounting post (311) that mates with the arrangement hole (3211).

5. The electric vehicle braking device according to claim 4, characterized in that, The mounting column (311) has a positioning plane (3111), and the rotating cam (32) has a planar structure on the side wall of the arrangement hole (3211) that cooperates with the positioning plane (3111).

6. The electric vehicle braking device according to claim 5, characterized in that, The number of positioning planes (3111) is two and they are symmetrically arranged on the side wall of the mounting column (311). The rotating cam (32) has a planar structure that matches the two positioning planes (3111) one by one.

7. The electric vehicle braking device according to claim 1, characterized in that, The brake handle (33) includes a rotating part (331), a driving part (332) connected to the rotating part (331) and extending away from the contact switch (2), and an abutting part (333) connected to the rotating part (331) and engaging with the mounting bracket (1); the rotating part (331) has a driving hole (3311) for arranging the rotating shaft (31); the mounting bracket (1) has an arrangement groove (11) for rotatably arranging the rotating part (331) and the abutting part (333); the bottom of the arrangement groove (11) has a limiting surface (113) for abutting the abutting part (333).

8. The electric vehicle braking device according to claim 7, characterized in that, An elastic structure is provided between the rotating part (331) and the mounting bracket (1) for driving the brake handle (33) to reset from the brake position to the initial position.

9. A braking device for an electric vehicle according to claim 8, characterized in that, The elastic structure includes a mounting block (41) that slides horizontally on the mounting bracket (1), a support spring (43) that is arranged at the bottom of the mounting block (41) and drives the mounting block (41) to move toward the side closer to the rotating part (331), and a connecting rod (42) hinged between the mounting block (41) and the rotating part (331); the mounting bracket (1) has a mounting groove (12) at the bottom of the arrangement groove (11) for arranging the support spring (43) and the mounting block (41).

10. An electric vehicle braking device according to claim 7, characterized in that, The rotating part (331) has a positioning hole (3312) on its side, which is arranged along the axis perpendicular to the driving hole (3311) and communicates with the driving hole (3311). The rotating shaft (31) has a tapered hole (312) that mates with the positioning hole (3312).

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