Brake valve with adjustable resistance and rail transit vehicle

Abstract

The utility model provides a resistance-adjustable brake valve and a rail transit vehicle, the resistance-adjustable brake valve comprises a mounting block assembly, a brake handle mechanism and a friction adjusting mechanism, and the brake handle mechanism is connected with the friction adjusting mechanism; the brake handle mechanism comprises a gear rotating wheel, the friction adjusting mechanism comprises a friction plate and a pressing adjusting assembly, the gear rotating wheel and the friction plate are arranged in the mounting block assembly, the friction plate abuts against the side wall of the mounting block assembly, and the pressing adjusting assembly penetrates through the mounting block assembly to abut against the gear rotating wheel. The pressing force between the friction plate and the side wall of the mounting block assembly is adjusted by adjusting the pressing force between the pressing adjusting assembly and the gear rotating wheel. According to the resistance-adjustable brake valve, the control resistance can be adjusted, so that the handle of the brake valve has the adjustable control resistance in the operation process, and a driver can control the brake valve better. And the friction plate can also be subjected to compensation adjustment, so that the operation hand feeling of the brake valve is kept within a constant range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit brake valve, and particularly to an adjustable resistance brake valve and rail transit vehicle. BACKGROUND

[0002] The brake valve is an important component for controlling the braking, pressure maintaining and releasing of the whole train, and plays a crucial role in the train operation. The brake valve has multiple functions, including brake control function. The brake control can adjust and distribute the pressure of compressed air, thereby controlling the action of the brake cylinder and realizing the braking of the train or car.

[0003] The brake valve has multiple action positions (gears), and different braking and releasing effects are achieved by rotating the handle. The handle of the brake valve needs to have a certain resistance (hand feeling) during operation, so as to facilitate better control by the driver. The existing brake valve cannot adjust the control resistance, which reduces the control performance. In addition, after long-term use, the friction plate wears out and cannot be adjusted specifically, further reducing the control performance.

[0004] Therefore, it is necessary to design an adjustable resistance brake valve to solve the above problems. CONTENT OF THE INVENTION

[0005] Therefore, in order to overcome the defects of the prior art, the present application provides an adjustable resistance brake valve and rail transit vehicle, which effectively solves the problem of reduced control performance caused by the inability of the existing brake valve to adjust the control resistance.

[0006] According to the first aspect of the present application, an adjustable resistance brake valve is provided, wherein the adjustable resistance brake valve comprises a mounting block assembly, a brake handle mechanism and a friction adjustment mechanism, the brake handle mechanism is connected with the friction adjustment mechanism; the brake handle mechanism comprises a gear rotating wheel, the friction adjustment mechanism comprises a friction plate and a compression adjustment assembly, the gear rotating wheel and the friction plate are both arranged inside the mounting block assembly, the friction plate abuts against the side wall of the mounting block assembly, and the compression adjustment assembly abuts against the gear rotating wheel by penetrating the mounting block assembly; the compression of the gear rotating wheel and the compression adjustment assembly is adjusted to adjust the compression of the friction plate and the side wall of the mounting block assembly.

[0007] Preferably, one side of the gear rotating wheel facing the compression adjustment assembly is provided with a plurality of gear grooves; the compression adjustment assembly comprises an adjusting nut and a spring steel ball screw, the spring steel ball screw comprises a screw rod part, a steel ball part and a spring part, the steel ball part is connected with the screw rod part through the spring part, the screw rod part penetrates the mounting block assembly so that the steel ball part abuts against the gear groove, and the adjusting nut is adjustably arranged on the screw rod part.

[0008] Preferably, the brake handle mechanism further comprises a handle body and a main shaft, the handle body is connected with the main shaft, the main shaft is arranged through the mounting block assembly, the gear rotating wheel and the friction plate, the gear rotating wheel is driven to rotate by rotating the handle body, so that the spring steel ball screw moves from one gear slot to another gear slot.

[0009] Preferably, the mounting block assembly comprises a first mounting block and a second mounting block, the first mounting block and the second mounting block are connected with each other, the main shaft is rotatably arranged through the first mounting block and the second mounting block, the gear rotating wheel is capable of abutting against the first mounting block, and the friction plate is capable of abutting against the second mounting block.

[0010] Preferably, the brake handle mechanism further comprises a gear output assembly, the gear output assembly is arranged between the gear rotating wheel and the friction plate.

[0011] Preferably, the gear output assembly comprises a driving gear, a driven gear and a potentiometer, the driving gear is arranged between the gear rotating wheel and the friction plate, the driving gear is meshed with the driven gear, and the potentiometer is connected with the driven gear.

[0012] Preferably, the brake handle mechanism further comprises a rotating side wheel, the rotating side wheel is arranged between the friction plate and the driving gear.

[0013] Preferably, the gear rotating wheel comprises a first rotating sleeve, the first rotating sleeve extends from the center of the gear rotating wheel to a direction away from the friction plate, and the first rotating sleeve is rotatably arranged in the inside of the mounting block assembly through a sliding piece; the rotating side wheel comprises a second rotating sleeve, the second rotating sleeve extends from the center of the rotating side wheel to a direction away from the gear rotating wheel, the second rotating sleeve is arranged through the friction plate, and the end of the second rotating sleeve is rotatably arranged in the inside of the mounting block assembly through a sliding piece.

[0014] Preferably, the brake handle mechanism further comprises a position reaching prompting assembly, the position reaching prompting assembly comprises a micro switch and a limiting pin, the limiting pin is arranged at the bottom of the gear rotating wheel, the micro switch is arranged at the bottom of the mounting block assembly, and the limiting pin is capable of abutting against the micro switch in the case that the gear rotating wheel rotates.

[0015] According to the second aspect of the utility model, a rail transit vehicle is provided, wherein the rail transit vehicle comprises the brake valve with adjustable resistance as described above.

[0016] According to the adjustable resistance brake valve of the utility model, through the cooperation of the three of mounting block assembly, brake handle mechanism and friction adjustment mechanism, the adjustment control resistance can be realized. Since the brake handle mechanism and the friction adjustment mechanism are both installed in the inside of the mounting block assembly, the compression force of the compression adjustment assembly on the gear rotating wheel can be used to adjust the friction force between the friction plate and the side wall of the mounting block, so that the handle of the brake valve has adjustable control resistance in the operation process, so as to facilitate the better control of the driver. After the friction plate is worn after long time use, the compression force of the compression adjustment assembly on the gear rotating wheel can be adjusted to make targeted compensation adjustment, so that the operation feeling of the brake valve is kept in a constant range, and the control performance is further improved.

[0017] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 A structure schematic diagram of the adjustable resistance brake valve according to the embodiment of the utility model is shown.

[0020] Figure 2 A partial structure schematic diagram of the adjustable resistance brake valve according to the embodiment of the utility model is shown.

[0021] Figure 3 A partial structure schematic diagram of the adjustable resistance brake valve according to the embodiment of the utility model is shown.

[0022] Figure 4 An explosion view of the partial structure of the adjustable resistance brake valve according to the embodiment of the utility model is shown.

[0023] Reference signs: 101-First mounting block; 102-Second mounting block; 201-Gear rotating wheel; 202-Gear slot; 203-Handle body; 204-Main shaft; 205-Rotating side wheel; 206-First rotating sleeve; 207-Second rotating sleeve; 208-Sliding piece; 301-Friction plate; 302-Adjusting nut; 303-Spring steel ball screw; 401-Driving gear; 402-Following gear; 403-Potentiometer; 501-Micro switch; 502-Limiting pin. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] According to a first aspect of this utility model, an adjustable resistance brake valve is provided, such as... Figures 1 to 4 As shown, the adjustable resistance brake valve is used in rail transit trains, such as in an EVB (Electronic Vacuum Booster) electronic brake valve device. The adjustable resistance brake valve includes a mounting block assembly, a brake handle mechanism, and a friction adjustment mechanism.

[0029] In the following description, reference will be made to Figures 1 to 4 The detailed structure of the mounting block assembly, brake handle mechanism and friction adjustment mechanism of the adjustable resistance brake valve will be described in detail.

[0030] As Figure 1 shown, in the embodiment, the mounting block assembly can include a first mounting block 101 and a second mounting block 102. The first mounting block 101 and the second mounting block 102 can be connected to each other by connecting screws, and the adjustable resistance brake valve can be mounted on the housing of the brake valve device through the first mounting block 101 and the second mounting block 102. The first mounting block 101 and the second mounting block 102 can also be used for the installation and connection of the brake handle mechanism and the friction adjustment mechanism. Due to the structural design and installation requirements, the size of the first mounting block 101 is larger than that of the second mounting block 102, so as to facilitate the installation of the brake handle mechanism. The middle positions of the first mounting block 101 and the second mounting block 102 are both provided with through holes for the passage of the main shaft 204.

[0031] As Figures 1 to 4 shown, in the embodiment, the brake handle mechanism is connected with the friction adjustment mechanism. In the case that the user operates the brake handle mechanism, the friction adjustment mechanism can give corresponding friction resistance, so that the user can obtain a corresponding hand feeling when operating, and the operation is facilitated. Specifically, the brake handle mechanism includes a gear shift wheel 201, and the friction adjustment mechanism includes a friction plate 301 and a compression adjustment assembly. The gear shift wheel 201 and the friction plate 301 are both arranged inside the mounting block assembly, the friction plate 301 abuts against the side wall of the mounting block assembly (the side wall of the second mounting block 102), and the compression adjustment assembly abuts against the gear shift wheel 201 by penetrating the mounting block assembly (the first mounting block 101). By adjusting the compression force of the compression adjustment assembly and the gear shift wheel 201, the compression force of the friction plate 301 and the side wall of the mounting block assembly can be adjusted. Since the compression adjustment assembly abuts against the gear shift wheel 201 by the compression force, every time the user shifts gears, the gear shift wheel 201 is driven to rotate by the brake handle mechanism, and at this time, the compression adjustment assembly moves the gear shift wheel 201 towards the friction plate 301 due to the compression force, so that the friction plate 301 abuts against and rubs against the side wall of the second mounting block 102 to generate resistance. In this process, the friction resistance generated by the friction plate 301 and the side wall of the second mounting block 102 can be adjusted by adjusting the compression force of the compression adjustment assembly, and finally the optimal operation hand feeling is obtained, which facilitates better operation of the driver. In addition, when used for a long time, the friction plate 301 will be worn and the friction force will decrease. At this time, the friction force of the friction plate 301 and the side wall of the second mounting block 102 can also be adjusted by adjusting the compression force of the compression adjustment assembly.

[0032] This adjustable-resistance brake valve achieves adjustable operating resistance through the cooperation of the mounting block assembly, brake handle mechanism, and friction adjustment mechanism. Since both the brake handle mechanism and the friction adjustment mechanism are installed inside the mounting block assembly, the clamping force of the clamping adjustment assembly on the gear shift wheel 201 can be used to adjust the friction between the friction plate 301 and the side wall of the mounting block. This allows the brake valve handle to have adjustable operating resistance during operation, facilitating better driver control. Furthermore, after prolonged use and wear of the friction plate 301, the clamping force of the clamping adjustment assembly on the gear shift wheel 201 can be adjusted for targeted compensation, keeping the brake valve's operating feel within a constant range and further improving handling performance.

[0033] Preferably, such as Figure 2 As shown in the embodiment, the gear shift wheel 201 has multiple gear slots 202 on the side facing the clamping adjustment component. The clamping adjustment component can switch between different gear slots 202 to meet the gear shifting requirements.

[0034] Preferably, such as Figure 2 and Figure 4 As shown, in this embodiment, the clamping adjustment assembly may include an adjusting nut 302 and a spring ball screw 303, the spring ball screw 303 including a screw portion, a ball portion and a spring portion. Figure 4 In the configuration, the steel ball portion is in a compressed state (therefore the spring portion is not shown). The steel ball portion is connected to the screw portion via the spring portion. The screw portion passes through the mounting block assembly so that the steel ball portion abuts against the gear position groove 202. The adjusting nut 302 is adjustablely positioned on the screw portion. Each time a gear is shifted, the handle body 203 drives the gear position wheel 201 to rotate. The steel ball portion of the spring steel ball screw 303 slides from one gear position groove 202 across the surface of the gear position wheel 201 to another gear position groove 202, thus shifting gears. During this process, since the steel ball portion of the spring steel ball screw 303 needs to slide from the gear position groove 202 to the surface of the gear position wheel 201 first, the steel ball portion and the spring portion of the spring steel ball screw 303 will generate a corresponding compressive force on the gear position wheel 201, causing the gear position wheel 201 to shift towards the friction plate 301, compressing the friction plate 301. The friction plate 301 is then pressed against the second mounting block 102, thereby generating frictional resistance. When the ball portion of the spring ball screw 303 slides from the surface of the gear shift wheel 201 to another gear shift slot 202, the spring portion returns to its original position, reducing the corresponding compressive force on the gear shift wheel 201 to facilitate the user's next gear shift. During gear shifting, the position of the adjusting nut 302 on the screw portion of the spring ball screw 303 can be adjusted to change the compression force of the spring portion, thereby indirectly adjusting the frictional resistance. This provides a certain level of resistance (feel) during gear shifting. Furthermore, after the friction plate 301 wears, targeted compensation adjustments can be made to keep the resistance (feel) within a constant range.

[0035] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the brake handle mechanism may further include a handle body 203 and a main shaft 204. The handle body 203 is connected to the main shaft 204, and the connection can be a common key shaft connection. This key shaft connection allows the main shaft 204 to rotate together with the handle body 203 when the user rotates it; details will not be elaborated here. The main shaft 204 passes through the mounting block assembly, the gear shift wheel 201, and the friction plate 301. Rotating the handle body 203 drives the gear shift wheel 201 to rotate, causing the spring ball screw 303 to move from one gear shift slot 202 to another. In other words, while the spring ball screw 303 is fixed to the first mounting block 101, the gear shift is driven by the rotation of the gear shift wheel 201 during gear changing.

[0036] Preferably, such as Figure 1 As shown, in this embodiment, the gear shift wheel 201 abuts against the first mounting block 101, and the friction plate 301 abuts against the second mounting block 102. When the gear shift wheel 201 shifts gears, it is offset towards the direction of the friction plate 301 due to the squeezing force of the spring ball screw 303, thereby causing the friction plate 301 to abut against the second mounting block 102 and generate frictional resistance. When not shifting gears, the friction plate 301 does not abut against the second mounting block 102 and generate frictional resistance, thus extending its service life.

[0037] Preferably, such as Figures 1 to 4 As shown, in this embodiment, the brake handle mechanism may further include a gear output assembly, which is disposed between the gear shift wheel 201 and the friction plate 301. The gear output assembly can be used to output the current gear position to the outside, such as being in first gear, second gear, or third gear, and can also output the gear shifting information to the outside, such as shifting from first gear to second gear, from second gear to third gear, or from third gear to first gear, etc.

[0038] Specifically, the gear output assembly can include a driving gear 401, a driven gear 402 and a potentiometer 403, the driving gear 401 is arranged between the gear shift wheel 201 and the friction plate 301, the driving gear 401 is engaged with the driven gear 402, and the potentiometer 403 is connected with the driven gear 402. The driving gear 401 can rotate with the main shaft 204, the rotation action of the driving gear 401 is the same as that of the gear shift wheel 201, and the rotation action at this time is transmitted to the potentiometer 403 through the driven gear 402. The potentiometer 403 can be a detection element in the prior art, and is a continuously adjustable resistor. When the handle body 203 is adjusted or rotated, the cooperation of the driving gear 401 and the driven gear 402 enables the output end of the potentiometer 403 to obtain an output voltage related to the gear rotation angle or stroke, and the voltage signal is transmitted to the control cabinet of the rail train to realize brake control.

[0039] Preferably, as shown in the embodiment, the brake handle mechanism can further include a rotating side wheel 205 arranged between the friction plate 301 and the driving gear 401. The rotating side wheel 205 can be used to assist rotation. Figures 1 to 4

[0040] Specifically, the gear shift wheel 201 includes a first rotating sleeve 206 extending from the center of the gear shift wheel 201 to a direction away from the friction plate 301, and the first rotating sleeve 206 is rotatably arranged in the inside of the mounting block assembly (the first mounting block 101) through a sliding piece 208. The rotating side wheel 205 includes a second rotating sleeve 207 extending from the center of the rotating side wheel 205 to a direction away from the gear shift wheel 201, and the second rotating sleeve 207 penetrates the friction plate 301, and the end of the second rotating sleeve 207 is rotatably arranged in the inside of the mounting block assembly (the second mounting block 102) through the sliding piece 208. The sliding piece 208 can be a bearing or a brass sleeve, etc.

[0041] Preferably, as shown in the embodiment, the brake handle mechanism can further include a to-position prompting assembly, which can include a micro switch 501 and a limiting pin 502. The limiting pin 502 is arranged at the bottom of the gear shift wheel 201, and the micro switch 501 is arranged at the bottom of the mounting block assembly. When the gear shift wheel 201 rotates, the limiting pin 502 can abut against the micro switch 501 to prompt that the gear shift wheel 201 has been rotated to the maximum or minimum gear position. The micro switch 501 can be a part in the prior art, and its structure and principle will not be described in detail. The micro switch 501 can be electrically connected with an external controller. The external controller can be a control cabinet of a rail train, for example. Figures 1 to 3

[0042] ​​The use process of the adjustable resistance brake valve is as follows: the user can first adjust the position of the adjusting nut 302 on the screw rod of the spring steel ball screw 303, adjust the pressing force of the spring steel ball screw 303 on the gear shift wheel 201 by compressing or releasing the spring part of the spring steel ball screw 303, and indirectly adjust the friction between the friction plate 301 and the side wall of the second mounting block 102, that is, adjust the control resistance. After the user adjusts the control resistance to a suitable range, the handle body 203 is moved to drive the gear shift wheel 201 to rotate, so that the spring steel ball screw 303 slides from one gear shift groove 202 to another gear shift groove 202. During the sliding process, the gear shift wheel 201 is offset due to the extrusion force of the spring steel ball screw 303, so that the friction between the friction plate 301 and the side wall of the second mounting block 102 is generated. During the adjustment of the gear shift, the gear shift adjustment can be transmitted to the control cabinet through the cooperation of the driving gear 401, the driven gear 402 and the potentiometer 403. During the adjustment of the gear shift, the micro switch 501 and the limit pin 502 can also be used to prompt that the gear shift wheel 201 has been rotated to the maximum or minimum gear shift position. After a long time of use, if the friction plate 301 is worn, the position of the adjusting nut 302 on the screw rod of the spring steel ball screw 303 can be adjusted to compensate for the friction.

[0043] The adjustable resistance brake valve can adjust the control resistance by the cooperation of the mounting block assembly, the brake handle mechanism and the friction adjustment mechanism. Since the brake handle mechanism and the friction adjustment mechanism are both installed in the inside of the mounting block assembly, the pressing force of the pressing adjustment assembly on the gear shift wheel can be used to adjust the friction between the friction plate and the side wall of the mounting block, so that the handle of the brake valve has adjustable control resistance during operation, which is convenient for the driver to better control. After the friction plate is worn after a long time of use, the pressing force of the pressing adjustment assembly on the gear shift wheel can be adjusted for targeted compensation adjustment, so that the operation feeling of the brake valve is kept in a constant range, and the control performance is further improved.

[0044] In addition, according to the second aspect of the utility model, a rail transit vehicle is provided, and the rail transit vehicle comprises the adjustable resistance brake valve. The rail transit vehicle can adjust the control resistance during driving, so as to be convenient for the driver to better control.

[0045] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any skilled person in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A brake valve of adjustable resistance, characterized in that The brake valve with adjustable resistance comprises a mounting block assembly, a brake handle mechanism and a friction adjustment mechanism, the brake handle mechanism is connected with the friction adjustment mechanism; The brake handle mechanism comprises a gear shift wheel, and the friction adjustment mechanism comprises a friction plate and a compression adjustment assembly, the gear shift wheel and the friction plate are arranged inside the mounting block assembly, the friction plate abuts against the side wall of the mounting block assembly, and the compression adjustment assembly abuts against the gear shift wheel by penetrating the mounting block assembly; the compression force between the friction plate and the side wall of the mounting block assembly is adjusted by adjusting the compression force between the compression adjustment assembly and the gear shift wheel.

2. The brake valve of claim 1, wherein, The gear shift wheel is provided with a plurality of gear shift grooves on the side facing the compression adjustment assembly; The compression adjustment assembly comprises an adjusting nut and a spring steel ball screw, the spring steel ball screw comprises a screw rod part, a steel ball part and a spring part, the steel ball part is connected with the screw rod part through the spring part, the screw rod part penetrates the mounting block assembly so that the steel ball part abuts against the gear shift groove, and the adjusting nut is arranged on the screw rod part in an adjustable position.

3. The brake valve of claim 2, wherein, The brake handle mechanism further comprises a handle body and a main shaft, the handle body is connected with the main shaft, the main shaft penetrates the mounting block assembly, the gear shift wheel and the friction plate, the spring steel ball screw is moved from one gear shift groove to another gear shift groove by rotating the handle body to drive the gear shift wheel to rotate.

4. The brake valve of claim 3, wherein, The mounting block assembly comprises a first mounting block and a second mounting block, the first mounting block and the second mounting block are connected with each other, the main shaft is rotatably penetrated in the first mounting block and the second mounting block, the gear shift wheel can abut against the first mounting block, and the friction plate can abut against the second mounting block.

5. The adjustable resistance brake valve of claim 1, wherein, The brake handle mechanism further comprises a gear output assembly, and the gear output assembly is arranged between the gear shift wheel and the friction plate.

6. The brake valve of claim 5, wherein, The gear output assembly comprises a driving gear, a driven gear and a potentiometer, the driving gear is arranged between the gear shift wheel and the friction plate, the driving gear is engaged with the driven gear, and the potentiometer is connected with the driven gear.

7. A variable resistance brake valve according to claim 6, characterised in that, The brake handle mechanism further comprises a rotating side wheel, and the rotating side wheel is arranged between the friction plate and the driving gear.

8. The adjustable resistance brake valve of claim 7, wherein, The gear shift wheel comprises a first rotating sleeve, the first rotating sleeve extends from the center of the gear shift wheel to a direction away from the friction plate, and the first rotating sleeve is rotatably arranged inside the mounting block assembly through a sliding piece; The rotating side wheel comprises a second rotating sleeve, the second rotating sleeve extends from the center of the rotating side wheel to a direction away from the gear shift wheel, the second rotating sleeve penetrates the friction plate, and the end of the second rotating sleeve is rotatably arranged inside the mounting block assembly through a sliding piece.

9. The adjustable resistance brake valve of claim 1, wherein, The brake handle mechanism further comprises a position-to-site prompting assembly, the position-to-site prompting assembly comprising a micro switch and a limiting pin, the limiting pin being arranged at the bottom of the gear rotating wheel, and the micro switch being arranged at the bottom of the mounting block assembly, and the limiting pin being capable of abutting against the micro switch in the case of rotation of the gear rotating wheel.

10. A rail vehicle, characterized by The rail transit vehicle comprises the brake valve with adjustable resistance according to any one of claims 1 to 9.

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