Electric vehicle brake device

Abstract

The present invention discloses an electric vehicle brake device, comprising a brake handle, a brake actuator, an auxiliary brake assembly and a proportional valve; the brake work is performed by cooperating with the front wheel actuator assembly and the rear wheel actuator assembly through the rear wheel brake handle at the same time; during the braking process, even if only the rear wheel brake handle is pinched, the present invention can issue a brake command to the front wheel actuator assembly and the rear wheel actuator assembly at the same time; the setting of the proportional valve can not only issue a brake command to the rear wheel actuator assembly through the rear wheel brake handle; the auxiliary brake assembly can also issue a brake command to the rear wheel actuator assembly; therefore, not only can the rear wheel brake handle be pulled by hand to brake, but the auxiliary brake assembly can also be triggered by the legs to brake.

Description

Technical Field

[0001] The invention relates to the field of design and manufacture of electric vehicle brake devices, and more specifically, to an electric vehicle brake device. Background Art

[0002] Electric vehicles are mechatronic vehicles that use batteries as auxiliary energy and are equipped with motors, controllers, batteries, throttles, brake handles and other operating components and display instrument systems based on ordinary small cars. They provide great convenience for people's short-distance travel.

[0003] Driven by the motor, many electric vehicles can now reach a maximum speed of 40-50KM / H. Although this makes people's travel more convenient to a great extent, it also greatly increases the probability of traffic accidents involving electric vehicles. As a means of transportation, it is necessary not only to ensure people's travel convenience but also to ensure the safety of use. The brake device is an extremely important part of electric vehicle control, which provides great protection for the driving safety of electric vehicles. However, electric vehicles currently on the market usually use two brake handles to control the front and rear wheels respectively for braking. When the electric vehicle is driving, the driver's driving posture usually uses one hand to hold the handle and be on the brake handle ready to brake at any time, while the other hand turns the handlebar to drive the motor to work. Therefore, when emergency braking is required, the driver is likely to react in time, and the hand turning the handlebar cannot pull the brake handle in time for braking, which causes the brake device of only one wheel to execute the braking command, resulting in a traffic accident. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and provides an electric vehicle brake device which has a simple structure, a reasonable design, is convenient for the driver to react and has a better braking effect.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] An electric vehicle brake device comprises a brake handle, a brake actuator assembly, an auxiliary brake assembly and a proportional valve;

[0007] The brake actuation assembly includes a front wheel actuation assembly and a rear wheel actuation assembly;

[0008] The brake handle includes a front wheel brake handle and a rear wheel brake handle; wherein the front wheel brake cooperates with the front wheel actuator to perform the braking operation; and the rear wheel brake handle cooperates with the front wheel actuator to perform the braking operation;

[0009] The proportional valve includes an input end and an output end; the rear wheel brake handle and the auxiliary brake assembly cooperate with the input end of the proportional valve, and the rear wheel actuator assembly cooperates with the output end of the proportional valve; the rear wheel brake handle and the auxiliary brake assembly cooperate with the proportional valve to enable the rear wheel actuator assembly to perform braking work.

[0010] Furthermore, the proportional valve includes a valve body, a valve core and a valve core return spring; a valve body inner cavity is provided in the valve body, and a proportional valve input interface and a proportional valve output interface are also provided on the valve body, the proportional valve input interface is provided with an input channel communicating with the valve body inner cavity, and the proportional valve output interface is provided with a valve body output channel communicating with the valve body inner cavity; the input channel and the valve body output channel are provided at different ends of the valve body inner cavity; the valve core and the valve core return spring are provided in the valve body inner cavity, and the two ends of the valve core return spring are respectively connected with the inner wall of the valve body inner cavity and the end of the valve core away from the input channel, and control the movement of the valve core in the valve body inner cavity.

[0011] Furthermore, the proportional valve input interface includes a first proportional valve input interface and a second proportional valve input interface, and the first proportional valve input interface and the second proportional valve input interface are respectively connected with the rear wheel brake handle and the auxiliary brake assembly; the first proportional valve input interface is provided with a first input channel communicating with the inner cavity of the valve body, and the second proportional valve input interface is provided with a second input channel communicating with the inner cavity of the valve body, and the second input channel is provided between the first input channel and the valve body output channel; the inner cavity of the valve body includes a first area, a second area and a third area, the first area is communicated with the first input channel, the second area is communicated with the second input channel, and the third area is communicated with the valve body output channel; the inner diameter at the third area is larger than the inner diameter at the second area, and the inner diameter at the second area is larger than the inner diameter at the first area; a first sealing portion is provided on the valve core to seal the second area; the first sealing portion moves between the second area and the third area under the action of the valve core return spring, so that the second input channel communicates with the valve body output channel.

[0012] Furthermore, the proportional valve is also provided with an automatic pressure relief channel and a connecting channel, an automatic pressure relief valve is provided in the automatic pressure relief channel, and both ends of the connecting channel are respectively connected with the automatic pressure relief channel and the second input channel;

[0013] The automatic pressure relief channel is also provided with a pressure relief hole communicating with the second area, and a sealing steel ball is provided in the automatic pressure relief channel, and the sealing steel ball is provided between the pressure relief hole and the connecting channel;

[0014] The proportional valve is also provided with a manual pressure relief channel, and a manual pressure relief valve is provided in the manual pressure relief channel, and the manual pressure relief channel is communicated with the first input channel and the first area.

[0015] Furthermore, a spring connecting portion and a second sealing portion are respectively provided at both ends of the valve core, and the first sealing portion is provided between the spring connecting portion and the second sealing portion; the spring connecting portion cooperates with the valve core reset spring; when the valve core reset spring is expanded, the second sealing portion is located between the first input channel and the second input channel to close the first area, and the first sealing portion is located between the second input channel and the valve body output channel to close the second area; a sealing block is also provided on the side of the first sealing portion and the second sealing portion away from the first input channel.

[0016] Furthermore, the front wheel actuator assembly and the rear wheel actuator assembly both include a brake disc and a brake; the brake of the front wheel actuator assembly includes two actuator assembly input interfaces, and the two actuator assembly input interfaces are respectively connected to the front wheel brake handle and the rear wheel brake handle, and the front wheel brake handle and the rear wheel brake handle independently control the brake to press the brake disc; the brake of the rear wheel actuator assembly includes an actuator assembly input interface, and the actuator assembly input interface is connected to the proportional valve output interface.

[0017] Furthermore, the auxiliary brake assembly includes a pump body, a push rod and a pressure plate; a pump body inner cavity is provided in the pump body, the push rod is provided in the pump body inner cavity and moves in the pump body inner cavity; a pump body output interface and a pressure plate seat are also provided on the pump body, and the pump body output interface and the pressure plate seat are provided at different ends of the pump body inner cavity; the pump body output interface is cooperatively connected with the first proportional valve input interface; a pump body output channel communicating with the pump body inner cavity is provided in the pump body output interface; the pressure plate is rotatably connected with the pressure plate seat, the pressure plate contacts one end of the push rod, and the pressure plate drives the push rod to move in the pump body inner cavity.

[0018] Furthermore, the pressing sheet includes a first pressing sheet and a second pressing sheet, both of which are rotatably connected to the pressing sheet seat; the first pressing sheet is in contact with the push rod and the second pressing sheet, and the first pressing sheet squeezes the push rod under the drive of the second pressing sheet; the length of the second pressing sheet is greater than that of the first pressing sheet.

[0019] Furthermore, an activity space is provided in the pressing seat, and first activity holes are provided on both sides of the activity space; a first contact end and a first connecting end are provided at both ends of the first pressing plate, and a contact block is further provided on the first contact end, and the contact block contacts the ejector rod; the first connecting end is provided in the activity space, and a second activity hole is provided on the first connecting end;

[0020] The second pressing plate is provided with a second contact end and a second connecting end at both ends, the second connecting end is arranged in the movable space, and the third movable hole is arranged on the second connecting end; the auxiliary brake assembly also includes an assembly shaft, the assembly shaft passes through the first movable hole, the second movable hole and the third movable hole, and the first pressing plate and the second pressing plate rotate along the assembly shaft; a contact rod is arranged between the second contact end and the second connecting end, and the contact rod contacts the first contact end; the second contact end is an end driven to rotate by the action force, and a connecting hole is also arranged on the second contact end; a bend is arranged between the second contact end and the second connecting end.

[0021] The beneficial effects of the present invention are:

[0022] In the present invention, the rear wheel brake handle is used to cooperate with the front wheel actuator assembly and the rear wheel actuator assembly to perform braking work at the same time; so that during the braking process of the present invention, even if only the rear wheel brake handle is pinched, the braking command can be issued to the front wheel actuator assembly and the rear wheel actuator assembly at the same time; generally, the handlebar of an electric vehicle is set on the right hand side, so in the present invention, the rear wheel brake handle is set on the left hand side, and the handlebar and the front wheel brake handle are set on the right hand side, so that the driver can operate the handlebar with his right hand to drive the motor to work while the left hand can simultaneously prepare for braking; it is convenient for the driver to react and the braking effect is better.

[0023] In the present invention, the setting of the proportional valve can not only issue a braking command to the rear wheel actuator component through the rear wheel brake handle; it can also issue a braking command to the rear wheel actuator component through the auxiliary brake component; therefore, braking can be performed not only by pulling the rear wheel brake handle by hand, but also by triggering the auxiliary brake component by legs.

[0024] In the present invention, the first proportional valve input interface and the second proportional valve input interface are provided to realize the requirement of the auxiliary brake assembly and the rear wheel brake handle to control the rear wheel execution assembly to issue a brake command through the proportional valve.

[0025] In the present invention, the inner cavity of the valve body includes a first area, a second area and a third area, the first area is communicated with the first input channel, the second area is communicated with the second input channel, and the third area is communicated with the valve body output channel; the inner diameter at the third area is greater than the inner diameter at the second area, and the inner diameter at the second area is greater than the inner diameter at the first area; the difference in inner diameter between the first area and the second area ensures that when the oil or gas in the second input channel enters the second area, there is enough space for it to fill, and it is fully in contact with the first sealing part, and the valve core is evenly pushed toward the third area to move, so that the second input channel is communicated with the valve body output channel to achieve braking; and it can also speed up and increase the flow and flow rate of the oil or gas in the second input channel, so as to avoid the driver's feedback from pressing the rear wheel brake handle too hard, resulting in the driver being unable to perceive the braking force through the feedback of the rear wheel brake handle; at the same time, it can also avoid the oil or gas in the second input channel being blocked by the valve core in the second input channel, resulting in the inability to brake.

[0026] In the present invention, the automatic pressure relief channel is arranged so that when the first input channel inputs oil or gas into the inner cavity of the valve body to control the rear wheel actuator to issue a braking command, the oil or gas enters the second input channel along the second area and can be relieved through the automatic pressure relief valve, thereby preventing excessive pressure in the second input channel from causing damage to the second proportional valve input interface or components cooperating with the second proportional valve input interface.

[0027] In the present invention, the pressure relief hole connected to the second area is arranged on the automatic pressure relief channel, which facilitates the pressure relief of the inner cavity of the valve body after the brake command is completed; the sealing steel ball arranged in the automatic pressure relief channel enables the oil or gas entering the automatic pressure relief channel to push the sealing steel ball to close the pressure relief hole and relieve the pressure through the automatic pressure relief valve when the first input channel inputs oil or gas into the inner cavity of the valve body to control the rear wheel actuator to issue a brake command. When the inner cavity of the valve body is relieved after the brake command is completed, the oil or gas from the inner cavity of the valve body pushes the sealing steel ball to open the pressure relief hole to accelerate the pressure relief process.

[0028] In the present invention, the provision of the manual pressure relief channel and the manual pressure relief valve facilitates people to perform manual pressure relief work.

[0029] In the present invention, the provision of the sealing block further improves the sealing effect of the valve core.

[0030] In the present invention, the brake of the front wheel actuator assembly includes two actuator assembly input interfaces, so that both the front wheel brake handle and the rear wheel brake handle can control it to brake.

[0031] In the present invention, the push rod is driven to move by the pressure plate, and then the push rod drives the oil or gas in the pump body to enter the inner cavity of the valve body to push the valve core to move, thereby driving the rear wheel actuator to brake; the setting of the pressure plate makes it easy for people to drive the push rod to move, such as triggering the push rod movement by foot.

[0032] In the present invention, the pressing plate includes a first pressing plate and a second pressing plate, the first pressing plate contacts the push rod and the second pressing plate, and the first pressing plate squeezes the push rod under the drive of the second pressing plate, and the length of the second pressing plate is greater than that of the first pressing plate, so that people can move the push rod more easily by moving the lever away.

[0033] In the present invention, the arrangement of the contact rod facilitates the second pressing plate to drive the first pressing plate, and the bent arrangement reduces the space area occupied by the second pressing plate, thereby preventing the second pressing plate from having an excessively long moving stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the overall structure diagram of the present invention.

[0035] Figure 2 for Figure 1 Structural diagram of the middle proportional valve.

[0036] Figure 3 for Figure 1 Structural diagram of the auxiliary brake assembly.

[0037] Figure 4 A cross-sectional view of a proportional valve.

[0038] Figure 5 for Figure 4 Structural diagram of the middle pressure relief hole.

[0039] Figure 6 This is the structural diagram of the pump body and push rod.

[0040] Figure 7 A cross-sectional view of the pump body.

[0041] Figure 8 This is a structural diagram of the first tablet.

[0042] Fig. 9 This is a structural diagram of the second pressing tablet.

[0043] Numbers in the figure:

[0044] 1. Brake handle; 2. Brake actuator; 3. Auxiliary brake assembly; 4. Proportional valve; 11. Front wheel brake handle; 12. Rear wheel brake handle; 21. Front wheel actuator; 22. Rear wheel actuator; 23. Brake disc; 24. Brake; 25. Actuator input interface; 31. Pump body; 32. Push rod; 33. Pressing plate; 34. Assembly shaft; 41. Input end; 42. Output end; 43. Valve body; 44. Valve core; 45. Valve core return spring; 46. Automatic pressure relief channel; 47. Connecting channel; 48. Manual pressure relief channel; 311. Pump body cavity; 312. Pump body output interface; 313. Pressing plate seat; 314. Pump body output channel; 315. Activity space; 316. First activity hole; 331. First pressing plate; 332. Second pressing plate; 333. First contact end; 334. First engagement Connecting end; 335. Contact block; 336. Second movable hole; 337. Second contact end; 338. Second connecting end; 339. Third movable hole; 340. Contact rod; 341. Connecting hole; 342. Bend; 401. First area; 402. Second area; 403. Third area; 431. Valve body inner cavity; 432. Proportional valve input interface; 433. Proportional valve output interface; 434. Input channel; 435. Valve body output channel; 436. First proportional valve input interface; 437. Second proportional valve input interface; 438. First input channel; 439. Second input channel; 441. First sealing part; 442. Spring connecting part; 443. Second sealing part; 444. Sealing block; 461. Automatic pressure relief valve; 462. Pressure relief hole; 463. Sealing steel ball; 481. Manual pressure relief valve. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solutions of the present invention, and should not be regarded as limitations of the present invention.

[0046] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Example:

[0049] like Figure 1-9 As shown, an electric vehicle brake device comprises a brake handle 1 and a brake actuator 2; the brake actuator 2 comprises a front wheel actuator 21 and a rear wheel actuator 22; the brake handle 1 comprises a front wheel brake handle 11 and a rear wheel brake handle 12; wherein the front wheel brake cooperates with the front wheel actuator 21 to perform braking work; the rear wheel brake handle 12 cooperates with the front wheel actuator 21 and the rear wheel actuator 22 to perform braking work at the same time; the rear wheel brake handle 12 cooperates with the front wheel actuator 21 and the rear wheel actuator 22 to perform braking work at the same time; during the braking process of the present invention, even if only the rear wheel brake handle 12 is pinched, a brake command can be issued to the front wheel actuator 21 and the rear wheel actuator 22 at the same time; so that the braking effect is better.

[0050] Generally, the throttle of an electric vehicle is arranged on the right hand side. Therefore, in the present invention, the rear wheel brake handle 12 is arranged on the left hand side, and the throttle and the front wheel brake handle 11 are arranged on the right hand side, so that the driver can operate the throttle with his right hand to drive the motor to work while the left hand can simultaneously prepare for braking, which is convenient for the driver to react and makes the braking effect better.

[0051] In this embodiment, it also includes an auxiliary brake component 3 and a proportional valve 4; the proportional valve 4 includes an input end 41 and an output end 42; the rear wheel brake handle 12 and the auxiliary brake component 3 cooperate with the input end 41 of the proportional valve 4, and the rear wheel actuator component 22 cooperates with the output end 42 of the proportional valve 4; the setting of the proportional valve 4 can not only issue a braking command to the rear wheel actuator component 22 through the rear wheel brake handle 12; it can also issue a braking command to the rear wheel actuator component 22 through the auxiliary brake component 3; therefore, not only can braking be performed by pulling the rear wheel brake handle 12 by hand, but braking can also be performed by triggering the auxiliary brake component 3 by legs.

[0052] The proportional valve 4 includes a valve body 43, a valve core 44 and a valve core return spring 45; a valve body inner cavity 431 is provided in the valve body 43, and a proportional valve input interface 432 and a proportional valve output interface 433 are also provided on the valve body 43; the proportional valve input interface 432 is provided with an input channel 434 communicating with the valve body inner cavity 431, and the proportional valve output interface 433 is provided with a valve body output channel 435 communicating with the valve body inner cavity 431; the input channel 434 and the valve body output channel 435 are arranged at different ends of the valve body inner cavity 431; the valve core 44 and the valve core return spring 45 are arranged in the valve body inner cavity 431, and the two ends of the valve core return spring 45 are respectively connected to the inner wall of the valve body inner cavity 431 and the end of the valve core 44 away from the input channel 434, and control the movement of the valve core 44 in the valve body inner cavity 431.

[0053] In this embodiment, the proportional valve input interface 432 includes a first proportional valve input interface 436 and a second proportional valve input interface 437, and the first proportional valve input interface 436 and the second proportional valve input interface 437 are respectively connected to the rear wheel brake handle 12 and the auxiliary brake assembly 3, and the auxiliary brake assembly 3 and the rear wheel brake handle 12 are provided with the first proportional valve input interface 436 and the second proportional valve input interface 437. The auxiliary brake assembly 3 and the rear wheel brake handle 12 are required to control the rear wheel actuator assembly 22 to issue a brake command through the proportional valve 4; the first proportional valve input interface 436 is provided with a valve body cavity 4 The first input channel 438 communicates with the first proportional valve 31, the second proportional valve input interface 437 is provided with a second input channel 439 communicated with the valve body inner cavity 431, and the second input channel 439 is arranged between the first input channel 438 and the valve body output channel 435; the valve body inner cavity 431 includes a first area 401, a second area 402 and a third area 403, the first area 401 communicates with the first input channel 438, the second area 402 communicates with the second input channel 439, and the third area 403 communicates with the valve body output channel 435; the inner diameter of the third area 403 is greater than that of the second The inner diameter of the second area 402 is greater than the inner diameter of the first area 401; the valve core 44 is provided with a first sealing portion 441 for sealing the second area 402; the first sealing portion 441 moves between the second area 402 and the third area 403 under the action of the valve core return spring 45, so that the second input channel 439 is connected to the valve body output channel 435; the inner diameter difference between the first area 401 and the second area 402 ensures that when the oil or gas in the second input channel 439 enters the second area 402, there is enough space for it to fill and communicate with the first area 402. A sealing portion 441 is in full contact and evenly pushes the valve core 44 to move toward the third area 403, so that the second input channel 439 is connected to the valve body output channel 435 to achieve braking; and it can also speed up and increase the flow and flow rate of oil or gas in the second input channel 439 to prevent the driver from pressing the rear wheel brake handle 12 and causing too hard feedback, resulting in the driver being unable to sense the braking force through the feedback of the rear wheel brake handle 12; at the same time, it can also prevent the oil or gas in the second input channel 439 from being blocked by the valve core 44 in the second input channel 439, resulting in a situation where braking cannot be performed.

[0054] In this embodiment, the proportional valve 4 is further provided with an automatic pressure relief channel 46 and a connecting channel 47. An automatic pressure relief valve 461 is arranged in the automatic pressure relief channel 46, and both ends of the connecting channel 47 are respectively connected to the automatic pressure relief channel 46 and the second input channel 439; the setting of the automatic pressure relief channel 46 enables the first input channel 438 to input oil or gas into the inner cavity 431 of the valve body to control the rear wheel actuator 22 to issue a braking command. After the oil or gas enters the second input channel 439 along the second area 402, it can be relieved through the automatic pressure relief valve 461 to avoid excessive pressure in the second input channel 439, which may cause damage to the second proportional valve input interface 437 or components cooperating with the second proportional valve input interface 437.

[0055] In this embodiment, a pressure relief hole 462 communicating with the second area 402 is further provided on the automatic pressure relief channel 46, and a sealing steel ball 463 is provided in the automatic pressure relief channel 46, and the sealing steel ball 463 is arranged between the pressure relief hole 462 and the connecting channel 47; the pressure relief hole 462 communicating with the second area 402 provided on the automatic pressure relief channel 46 facilitates the pressure relief of the valve body cavity 431 after the brake command is completed; the sealing steel ball 463 provided in the automatic pressure relief channel 46 enables the first input channel 438 to input oil or gas into the valve body cavity 431 to control the rear wheel actuator 22 to issue a brake command. When the oil or gas entering the automatic pressure relief channel 46 pushes the sealing steel ball 463 to close the pressure relief hole 462 and relieve the pressure through the automatic pressure relief valve 461; and when the pressure relief of the valve body cavity 431 is completed after the brake command is completed, the oil or gas from the valve body cavity 431 pushes the sealing steel ball 463 to open the pressure relief hole 462 to accelerate the pressure relief process.

[0056] A manual pressure relief channel 48 is also provided on the proportional valve 4, and a manual pressure relief valve 481 is provided in the manual pressure relief channel 48, and the manual pressure relief channel 48 is communicated with the first input channel 438 and the first area 401; the setting of the manual pressure relief channel 48 and the manual pressure relief valve 481 facilitates people to perform manual pressure relief work.

[0057] A spring connecting portion 442 and a second sealing portion 443 are respectively provided at both ends of the valve core 44, and the first sealing portion 441 is provided between the spring connecting portion 442 and the second sealing portion 443; the spring connecting portion 442 cooperates with the valve core reset spring 45; when the valve core reset spring 45 is expanded, the second sealing portion 443 is located between the first input channel 438 and the second input channel 439 to close the first area 401, and the first sealing portion 441 is located between the second input channel 439 and the valve body output channel 435 to close the second area 402; a sealing block 444 is also provided on the side of the first sealing portion 441 and the second sealing portion 443 away from the first input channel 438, and the sealing effect of the first sealing portion 441 and the second sealing portion 443 is improved by the sealing block 444.

[0058] In this embodiment, the front wheel actuator assembly 21 and the rear wheel actuator assembly 22 both include a brake disc 23 and a brake 24; the brake 24 of the front wheel actuator assembly 21 includes two actuator input interfaces 25, and the two actuator input interfaces 25 are respectively connected to the front wheel brake handle 11 and the rear wheel brake handle 12, and the front wheel brake handle 11 and the rear wheel brake handle 12 independently control the brake 24 to press the brake disc 23; the brake 24 of the rear wheel actuator assembly 22 includes an actuator input interface 25, and the actuator input interface 25 is connected to the proportional valve output interface 433; the brake 24 of the front wheel actuator assembly 21 includes two actuator input interfaces 25, so that the front wheel brake handle 11 and the rear wheel brake handle 12 can both control it to brake.

[0059] The auxiliary brake assembly 3 includes a pump body 31, a push rod 32 and a pressing plate 33; a pump body cavity 311 is provided in the pump body 31, and the push rod 32 is arranged in the pump body cavity 311 and moves in the pump body cavity 311; a pump body output interface 312 and a pressing plate seat 313 are also provided on the pump body 31, and the pump body output interface 312 and the pressing plate seat 313 are arranged at different ends of the pump body cavity 311; the pump body output interface 312 is connected with the first proportional valve input interface 436; the pump body output interface 312 is provided with a first proportional valve input interface 436; The pump body output channel 314 is connected; the pressing plate 33 is rotatably connected to the pressing plate seat 313, the pressing plate 33 contacts one end of the push rod 32, and the pressing plate 33 drives the push rod 32 to move in the pump body cavity 311; the pressing plate 33 drives the push rod 32 to move, and then the push rod 32 drives the oil or gas in the pump body 31 to enter the valve body cavity 431 to push the valve core 44 to move, thereby driving the rear wheel actuator 22 to brake; the setting of the pressing plate 33 is convenient for people to drive the push rod 32 to move, such as the way of triggering the movement of the push rod 32 by foot.

[0060] In this embodiment, the pressing plate 33 includes a first pressing plate 331 and a second pressing plate 332, and the first pressing plate 331 and the second pressing plate 332 are both rotatably connected to the pressing plate seat 313; the first pressing plate 331 is in contact with the push rod 32 and the second pressing plate 332, and the first pressing plate 331 squeezes the push rod 32 under the drive of the second pressing plate 332; the length of the second pressing plate 332 is greater than that of the first pressing plate 331, and it is easier for people to drive the push rod 32 to move by moving the lever away.

[0061] The pressing plate seat 313 is provided with an activity space 315, and the two sides of the activity space 315 are provided with a first activity hole 316; the first pressing plate 331 is provided with a first contact end 333 and a first connecting end 334 at both ends, and the first contact end 333 is also provided with a contact block 335, and the contact block 335 is in contact with the top rod 32; the first connecting end 334 is provided in the activity space 315, and the second activity hole 336 is provided on the first connecting end 334; the second pressing plate 332 is provided with a second contact end 337 and a second connecting end 338 at both ends, and the second connecting end 338 is provided in the activity space 315, and the third activity hole 339 is provided on the second connecting end 338; the auxiliary brake assembly 3 also includes an assembly shaft 34, and the assembly shaft 34 passes through the first activity hole 316 , the second movable hole 336 and the third movable hole 339, the first pressing plate 331 and the second pressing plate 332 rotate along the assembly axis 34; a contact rod 340 is arranged between the second contact end 337 and the second connecting end 338, the contact rod 340 is in contact with the first contact end 333, and the arrangement of the contact rod 340 facilitates the second pressing plate 332 to drive the first pressing plate 331; the second contact end 337 is an end driven to rotate by the action force, and a connecting hole 341 is also arranged on the second contact end 337; a pedal can be assembled through the connecting hole 341 to facilitate people to brake with their feet; a bend 342 is arranged between the second contact end 337 and the second connecting end 338, and the arrangement of the bend 342 reduces the space occupied by the second pressing plate 332 and avoids the second pressing plate 332 from having an excessively long movable stroke.

[0062] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electric vehicle brake device, It is characterized in that It includes a brake handle, a brake actuator assembly, an auxiliary brake assembly and a proportional valve; The brake actuation assembly includes a front wheel actuation assembly and a rear wheel actuation assembly; The brake handle includes a front wheel brake handle and a rear wheel brake handle; wherein the front wheel brake cooperates with the front wheel actuator to perform the braking operation; and the rear wheel brake handle cooperates with the front wheel actuator to perform the braking operation; The proportional valve includes an input end and an output end; the rear wheel brake handle and the auxiliary brake assembly cooperate with the input end of the proportional valve, and the rear wheel actuator assembly cooperates with the output end of the proportional valve; the rear wheel brake handle and the auxiliary brake assembly cooperate with the proportional valve to enable the rear wheel actuator assembly to perform braking work; The auxiliary brake assembly comprises a pump body, a push rod and a pressing plate; a pump body cavity is arranged in the pump body, the push rod is arranged in the pump body cavity and moves in the pump body cavity; a pump body output interface and a pressing plate seat are also arranged on the pump body, and the pump body output interface and the pressing plate seat are arranged at different ends of the pump body cavity; the pump body output interface is cooperatively connected with the first proportional valve input interface; a pump body output channel communicating with the pump body cavity is arranged in the pump body output interface; the pressing plate is rotatably connected with the pressing plate seat, the pressing plate contacts one end of the push rod, and the pressing plate drives the push rod to move in the pump body cavity; The pressing sheet includes a first pressing sheet and a second pressing sheet, and the first pressing sheet and the second pressing sheet are both rotatably connected to the pressing sheet seat; The pressing plate seat is provided with an activity space, and first activity holes are provided on both sides of the activity space; the auxiliary brake assembly also includes an assembly shaft, which passes through the first activity hole, and the first pressing plate and the second pressing plate rotate along the assembly shaft.

2. An electric vehicle brake device according to claim 1, It is characterized in that The proportional valve includes a valve body, a valve core and a valve core reset spring; a valve body inner cavity is provided in the valve body, and a proportional valve input interface and a proportional valve output interface are also provided on the valve body, the proportional valve input interface is provided with an input channel communicating with the valve body inner cavity, and the proportional valve output interface is provided with a valve body output channel communicating with the valve body inner cavity; the input channel and the valve body output channel are provided at different ends of the valve body inner cavity; the valve core and the valve core reset spring are provided in the valve body inner cavity, and the two ends of the valve core reset spring are respectively connected with the inner wall of the valve body inner cavity and the end of the valve core away from the input channel, and control the movement of the valve core in the valve body inner cavity.

3. An electric vehicle brake device according to claim 2, It is characterized in that The proportional valve input interface includes a first proportional valve input interface and a second proportional valve input interface, and the first proportional valve input interface and the second proportional valve input interface are respectively connected with the rear wheel brake handle and the auxiliary brake assembly; the first proportional valve input interface is provided with a first input channel communicating with the inner cavity of the valve body, and the second proportional valve input interface is provided with a second input channel communicating with the inner cavity of the valve body, and the second input channel is provided between the first input channel and the valve body output channel; the inner cavity of the valve body includes a first area, a second area and a third area, the first area is communicated with the first input channel, the second area is communicated with the second input channel, and the third area is communicated with the valve body output channel; the inner diameter at the third area is greater than the inner diameter at the second area, and the inner diameter at the second area is greater than the inner diameter at the first area; The valve core is provided with a first sealing portion for sealing the second area; the first sealing portion moves between the second area and the third area under the action of the valve core return spring, so that the second input channel is communicated with the valve body output channel.

4. An electric vehicle brake device according to claim 3, It is characterized in that The proportional valve is also provided with an automatic pressure relief channel and a connecting channel. An automatic pressure relief valve is provided in the automatic pressure relief channel. Both ends of the connecting channel are communicated with the automatic pressure relief channel and the second input channel respectively. The automatic pressure relief channel is also provided with a pressure relief hole communicating with the second area, and a sealing steel ball is provided in the automatic pressure relief channel, and the sealing steel ball is provided between the pressure relief hole and the connecting channel; The proportional valve is also provided with a manual pressure relief channel, and a manual pressure relief valve is provided in the manual pressure relief channel, and the manual pressure relief channel is communicated with the first input channel and the first area.

5. An electric vehicle brake device according to claim 4, It is characterized in that A spring connecting part and a second sealing part are respectively provided at both ends of the valve core, and the first sealing part is provided between the spring connecting part and the second sealing part; the spring connecting part cooperates with the valve core reset spring; when the valve core reset spring is expanded, the second sealing part is located between the first input channel and the second input channel to close the first area, and the first sealing part is located between the second input channel and the valve body output channel to close the second area; a sealing block is also provided on the side of the first sealing part and the second sealing part away from the first input channel.

6. An electric vehicle brake device according to claim 5, It is characterized in that The front wheel actuator assembly and the rear wheel actuator assembly both include a brake disc and a brake; the brake of the front wheel actuator assembly includes two actuator assembly input interfaces, and the two actuator assembly input interfaces are respectively connected to the front wheel brake handle and the rear wheel brake handle, and the front wheel brake handle and the rear wheel brake handle independently control the brake to press the brake disc; the brake of the rear wheel actuator assembly includes an actuator assembly input interface, and the actuator assembly input interface is connected to the proportional valve output interface.

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