Manual remote relieving labor-saving system for parking brake

Abstract

The invention provides a manual remote relieving labor-saving system for parking braking. The manual remote relieving labor-saving system comprises an air supply pipeline, an execution module, a protection module and a relieving device. The relieving device comprises a protection cylinder and an execution cylinder; piston structures are mounted in the protection cylinder and the execution cylinder; the protection cylinder is provided with a protection cylinder spring; a piston rod of the protection cylinder penetrates through the connecting body to be attached to a piston of the execution cylinder. An execution cylinder spring is mounted in the execution cylinder; the air supply pipeline is used for providing compressed air; the execution module is used for controlling compressed air to be filled into or discharged from a compressed air cavity of the execution cylinder; the protection module is used for controlling compressed air to be filled into or discharged from a compressed air cavity of the protection cylinder; when the parking brake device needs to be relieved, the execution module controls the compressed air cavity of the execution cylinder to discharge compressed air, and the piston rod of the execution cylinder pulls the steel wire pull rope b to relieve the parking brake device. Parking braking can be mechanically relieved on a vehicle, the safety of workers can be improved, the fault handling time is shortened, and the fault influence is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rail vehicle braking, and in particular to a parking brake manual remote relief labor-saving system. Background Art

[0002] The basic brake device of rail vehicles is usually equipped with a parking brake device, and a hand release pull ring is set near the bogie wheels on both sides of the vehicle. It is connected to the parking brake device through a wire rope to relieve the spring parking brake force generated by the parking brake device to ensure that the rail vehicle releases the parking brake when there is no air. The operating pulling force is large and can only be operated under the vehicle. Mechanical release is not possible on the vehicle. Figure 1 As shown, when the vehicle is running, there is an air leakage problem in the parking brake air supply pipeline of the vehicle, and the spring force in the parking brake cylinder cannot be overcome, resulting in the accidental application of the parking brake, and the parking brake of the vehicle cannot be relieved by the relevant settings on the vehicle. For the basic brake device A with parking brake (B represents the basic brake device without parking brake), personnel are required to go under the vehicle to operate the hand relief pull ring C, short steel wire pull rope D, and long steel wire pull rope E to relieve the parking brake. When the hand relief pull ring C, short steel wire pull rope D, and long steel wire pull rope E are manually pulled, the pulling force is large. This method has a great safety hazard, the fault handling time is long, and the fault impact is large. Summary of the invention

[0003] In view of the technical problems existing in the existing manual mechanical relief of parking brakes mentioned above, a manual remote relief labor-saving system for parking brakes is provided which has a simple structure, is easy to assemble, and can mechanically relieve the parking brakes on the vehicle. The system can improve the safety of the staff, shorten the fault handling time, and reduce the impact of faults.

[0004] The technical means adopted by the present invention are as follows:

[0005] A parking brake manual remote relief labor-saving system, comprising an air supply pipeline, an execution module, a protection module and a relief device;

[0006] The relief device comprises a protection cylinder and an actuator cylinder which are fixedly connected to each other through a connecting body; a piston structure is installed in each of the protection cylinder and the actuator cylinder, and the interior is divided into a compressed air chamber and a spring installation chamber by the piston structure; the compressed air chambers of the protection cylinder and the actuator cylinder are adjacent; the piston structure comprises a piston and a piston rod; a protection cylinder spring is installed in the spring installation chamber of the protection cylinder; the piston rod of the protection cylinder passes through the connecting body and extends into the compressed air chamber of the actuator cylinder, and fits with the piston of the actuator cylinder; an actuator cylinder spring is installed in the spring installation chamber of the actuator cylinder; the piston rod of the actuator cylinder passes through the actuator cylinder spring and extends from the bottom of the actuator cylinder, and is connected to the parking brake device on the basic brake device of the vehicle through a steel wire rope;

[0007] The air supply pipeline is used to provide compressed air; the air supply pipeline is connected to the compressed air chambers of the execution cylinder and the protection cylinder through the execution module and the protection module respectively; the execution module is used to control the filling or discharge of compressed air into the compressed air chamber of the execution cylinder; the protection module is used to control the filling or discharge of compressed air into the compressed air chamber of the protection cylinder;

[0008] When the labor-saving system is in a normal state, compressed air is respectively charged into the compressed air chambers of the execution cylinder and the protection cylinder through the execution module and the protection module;

[0009] When the parking brake device needs to be released, the compressed air chamber of the actuator cylinder is controlled by the actuator module to discharge the compressed air, and the piston rod of the actuator cylinder pulls the steel wire rope b to release the parking brake device;

[0010] When the labor-saving system is in a normal state but the gas pressure in the compressed air chamber of the actuator cylinder decreases, the compressed air chamber of the protection cylinder is controlled by the protection module to discharge compressed air to prevent the piston of the actuator cylinder from malfunctioning.

[0011] Furthermore, when there is no compressed air in the compressed air chambers of the protection cylinder and the actuator cylinder, the initial spring force of the protection cylinder spring is at least three times the initial spring force of the actuator cylinder spring.

[0012] Furthermore, the execution module includes a one-way valve I, a solenoid valve and a plug valve; the solenoid valve includes an intake passage I and an exhaust passage I;

[0013] The first interface of the one-way valve I is connected to the air supply pipeline, and the second interface is connected to the air intake passage I of the solenoid valve;

[0014] The first connection port of the gate is respectively connected with the intake passage I and the exhaust passage I of the solenoid valve, and the second interface is connected with the compressed air chamber of the actuator cylinder; the solenoid valve is normally in a power-off state, and when the parking brake device needs to be released, the solenoid valve is controlled to be energized; when the solenoid valve is power-off, the intake passage I is connected, the exhaust passage I is blocked, and compressed air is filled into the compressed air chamber of the actuator cylinder through the intake passage I; when the solenoid valve is energized, the intake passage I is blocked, the exhaust passage I is connected, and the compressed air in the compressed air chamber of the actuator cylinder is discharged through the exhaust passage I.

[0015] Furthermore, the plug door is provided with an exhaust port and a handle for controlling the switch of the exhaust port.

[0016] Furthermore, the protection module includes a one-way valve II, a throttle plug and a pneumatic valve; the pneumatic valve includes a pneumatic regulating port, an air intake passage II and an exhaust passage II;

[0017] The second interface of the one-way valve I is also connected to the first interface of the one-way valve II and the pneumatic regulating port of the pneumatic valve respectively; the pressure at the pneumatic regulating port is the same as the pressure at the air inlet of the air inlet passage I of the solenoid valve; the second interface of the one-way valve II is connected to the first interface of the throttle plug; the second interface of the throttle plug is connected to the air inlet passage II of the pneumatic valve;

[0018] The throttling plug is used to slow down the speed of filling the compressed air into the compressed air cavity of the protection cylinder, so that the speed of filling the compressed air into the compressed air cavity of the protection cylinder is lower than the speed of filling the compressed air into the compressed air cavity of the actuator cylinder;

[0019] The compressed air chamber of the protection cylinder is respectively connected to the air inlet passage II and the exhaust passage II of the pneumatic valve;

[0020] The movement of the valve stem inside the pneumatic valve is related to the pressure at the pneumatic regulating port, and the pressure at the pneumatic regulating port corresponding to the movement of the valve stem is set to a set value. The pneumatic valve is also provided with a spring for resetting the valve stem when the valve stem moves;

[0021] When the relief and labor-saving system is in a normal state or the parking brake device is released, the pressure at the pneumatic regulating port is greater than or equal to the set value, the valve stem is actuated, the air intake passage II is connected, the exhaust passage II is closed, and compressed air is filled into the compressed air chamber of the protection cylinder through the air intake passage II;

[0022] When the relief and labor-saving system is in a normal state, but the gas pressure in the compressed air chamber of the actuator cylinder decreases, the pressure at the air inlet of the intake passage I and the pressure at the pneumatic regulating port also decrease. When the pressure at the pneumatic regulating port decreases to less than the set value, the valve stem is reset under the action of the spring, the intake passage II is cut off, and the exhaust passage II is connected. The compressed air in the compressed air chamber of the protection cylinder is discharged through the exhaust passage II to prevent the piston of the actuator cylinder from malfunctioning. When the pressure at the pneumatic regulating port recovers from less than the set value to greater than or equal to the set value, the valve stem is actuated, the intake passage II is connected, the exhaust passage II is cut off, and compressed air is refilled into the compressed air chamber of the protection cylinder through the intake passage II.

[0023] Furthermore, the protection cylinder further comprises a protection cylinder body, a protection cylinder piston and a protection cylinder piston rod; the execution cylinder further comprises an execution cylinder body, an execution cylinder piston rod and an execution cylinder piston;

[0024] The interior of the protection cylinder body and the actuator cylinder body is an axial two-stage stepped hole structure formed by a stepped platform, and the stepped hole structure includes a small diameter section and a large diameter section, and the small diameter section is close to the bottom of the protection cylinder body and the actuator cylinder body;

[0025] The front end side walls of the large diameter sections of the protection cylinder body and the actuator cylinder body are respectively provided with a protection cylinder air inlet hole and an actuator cylinder air inlet hole; the actuator module and the protection module are respectively connected to the actuator cylinder air inlet hole and the protection cylinder air inlet hole;

[0026] The protection cylinder piston and the actuator cylinder piston are concentrically mounted in the large diameter sections of the protection cylinder body and the actuator cylinder body respectively;

[0027] The protection cylinder spring is located between the protection cylinder piston and the bottom of the protection cylinder body; the protection cylinder spring is used to provide power for the protection cylinder piston and the protection cylinder piston rod;

[0028] The actuator cylinder spring is located between the actuator cylinder piston and the bottom of the actuator cylinder body; the actuator cylinder spring is used to provide power for the actuator cylinder piston and the actuator cylinder piston rod;

[0029] The stepped platforms in the protection cylinder body and the actuator cylinder body are used to limit the axial movement positions of the protection cylinder piston and the actuator cylinder piston respectively;

[0030] One end of the protection cylinder piston rod is fixedly connected to the protection cylinder piston, and the other end passes through the central hole of the connector and extends into the cylinder body of the actuator cylinder, and the end surface is in contact with the actuator cylinder piston;

[0031] One end of the actuator cylinder piston rod is fixedly connected to the actuator cylinder piston, and the other end passes through the actuator cylinder spring and extends from the bottom of the actuator cylinder to be connected to the steel wire rope.

[0032] Furthermore, a boss is axially arranged at the center of both sides of the connecting body; the air inlet hole of the protection cylinder and the air inlet hole of the actuator cylinder are respectively located on the front end side walls of the large diameter sections corresponding to the bosses in the protection cylinder body and the actuator cylinder body; the two bosses are respectively used to limit the axial movement positions of the protection cylinder piston and the actuator cylinder piston.

[0033] Furthermore, the protection cylinder also includes a protection cylinder adjustment bolt and a protection cylinder adjustment block; the protection cylinder adjustment block is concentrically installed in the small diameter section of the protection cylinder body; the protection cylinder spring is installed between the protection cylinder adjustment block and the protection cylinder piston; the protection cylinder adjustment bolt is installed in a threaded through hole opened in the center of the bottom of the protection cylinder body and fits with the protection cylinder adjustment block; the protection cylinder adjustment bolt and the protection cylinder adjustment block cooperate to adjust the spring force of the protection cylinder spring.

[0034] Furthermore, the actuator cylinder also includes an actuator cylinder adjustment bolt and an actuator cylinder adjustment block; the actuator cylinder adjustment block is concentrically installed in the small diameter section of the actuator cylinder body; the actuator cylinder spring is installed between the actuator cylinder adjustment block and the actuator cylinder piston; the actuator cylinder adjustment bolt is installed in a threaded through hole opened in the center of the bottom of the actuator cylinder body and fits with the actuator cylinder adjustment block; the actuator cylinder adjustment bolt and the actuator cylinder adjustment block are used to adjust the spring force of the actuator cylinder spring; the actuator cylinder adjustment bolt and the actuator cylinder adjustment block are both provided with through holes in the center for the actuator cylinder piston rod to pass through.

[0035] Furthermore, the side walls of the small diameter sections in the protection cylinder body and the execution cylinder body are respectively provided with a breathing hole I and a breathing hole II, which are used to keep the internal and external pressure balance of the chambers where the breathing holes I and the breathing holes II are located.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] The parking brake manual remote release labor-saving system provided by the present invention, by setting an execution module, enables the operator to release the parking brake device only by controlling the action of the solenoid valve or turning the plug door handle. There is no need for manual pulling operation or getting off the vehicle to operate, which reduces the labor intensity of the operator and improves the safety of the operating personnel and the efficiency of fault handling.

[0038] Based on the above reasons, the present invention can be widely promoted in the field of rail vehicle braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 The present invention is a structural schematic diagram of an existing manual mechanical parking brake release device.

[0041] Figure 2It is a schematic diagram of the connection between the manual remote relief and effort-saving parking brake system of the present invention and the vehicle foundation brake device.

[0042] Figure 3 This is a schematic structural diagram of the parking brake manual remote relief effort-saving system of the present invention.

[0043] Figure 4 This is a schematic diagram of the structure of the mitigation device of the present invention.

[0044] Figure 5 This is a cross-sectional view of the relief device of the present invention.

[0045] Figure 6 This is a working diagram of the parking brake manual remote relief effort-saving system of the present invention.

[0046] Figure 7 It is a schematic diagram of the working principle of the manual remote relief and effort-saving parking brake system of the present invention in normal state.

[0047] Figure 8 It is a schematic diagram of the working principle of the parking brake manual remote relief effort-saving system of the present invention in the parking brake device relief state.

[0048] In the figure: 1. air supply pipeline; 2. execution module; 21. check valve I; 22. solenoid valve; 23. plug gate; 3. protection module; 31. check valve II; 32. throttling plug; 33. pneumatic valve; 4. relief device; 41. protection cylinder; 411. protection cylinder body; 412. protection cylinder adjustment bolt; 413. protection cylinder adjustment block; 414. protection cylinder spring; 415. protection cylinder piston; 416. protection cylinder piston rod; 417. protection cylinder piston sealing ring ; 418, air inlet hole of protective cylinder; 419, breathing hole I; 42, actuator cylinder; 421, actuator cylinder body; 422, actuator cylinder adjustment bolt; 423, actuator cylinder piston rod; 424, actuator cylinder adjustment block; 425, actuator cylinder spring; 426, actuator cylinder piston; 427, actuator cylinder piston sealing ring; 428, actuator cylinder air inlet hole; 429, breathing hole II; 43, connector; 44, sealing gasket; 45, bolt; 46, nut; 47, sealing ring. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0053] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0056] Example 1

[0057] like Figure 2-8 As shown, the present invention provides a parking brake manual remote relief labor-saving system, including an air supply pipeline 1, an execution module 2, a protection module 3 and a relief device 4;

[0058] The relief device 4 includes a protection cylinder 41 and an actuator cylinder 42 which are fixedly connected to each other through a connector 43; a piston structure is installed in each of the protection cylinder 41 and the actuator cylinder 42, and the interior is divided into a compressed air chamber and a spring installation chamber by the piston structure; the compressed air chambers of the protection cylinder 41 and the actuator cylinder 42 are adjacent; the piston structure includes a piston and a piston rod; a protection cylinder spring 414 is installed in the spring installation chamber of the protection cylinder 41; the piston rod of the protection cylinder 41 passes through the connector 43 and extends into the compressed air chamber of the actuator cylinder 42, and fits with the piston of the actuator cylinder 42; an actuator cylinder spring 425 is installed in the spring installation chamber of the actuator cylinder 42; the piston rod of the actuator cylinder 42 passes through the actuator cylinder spring 425 and extends from the bottom of the actuator cylinder 42, and is connected to the parking brake device on the basic brake device e of the vehicle through a wire rope b;

[0059] The air supply pipeline 1 is used to provide compressed air; the air supply pipeline 1 is connected to the compressed air chambers of the execution cylinder 42 and the protection cylinder 41 through the execution module 2 and the protection module 3 respectively; the execution module 2 is used to control the filling or discharge of compressed air into the compressed air chamber of the execution cylinder 42; the protection module 3 is used to control the filling or discharge of compressed air into the compressed air chamber of the protection cylinder 41;

[0060] When the labor-saving system is in a normal state, compressed air is respectively charged into the compressed air chambers of the execution cylinder 42 and the protection cylinder 41 through the execution module 2 and the protection module 3;

[0061] When the parking brake device needs to be released, the compressed air chamber of the actuator cylinder 42 is controlled by the actuator module 2 to discharge the compressed air, and the piston rod of the actuator cylinder 42 pulls the wire rope b to release the parking brake device;

[0062] When the labor-saving system is in a normal state but the gas pressure in the compressed air cavity of the actuator cylinder 42 decreases, the compressed air cavity of the protection cylinder 41 is controlled by the protection module 3 to discharge compressed air to prevent the piston of the actuator cylinder 42 from malfunctioning.

[0063] Furthermore, filling the compressed air chamber of the actuator cylinder 42 with compressed air can compress the actuator cylinder spring 425 to store spring force; controlling the compressed air chamber of the actuator cylinder 42 to discharge compressed air can release the actuator cylinder spring 425 to release the spring force, so that the piston rod of the actuator cylinder 42 can pull the wire rope b to release the parking brake device.

[0064] Furthermore, in the present invention, when the effort-saving system is in a normal state, the gas pressure in the compressed air chamber of the actuator cylinder 42 may decrease due to reasons such as the vehicle being parked for a long time or air leakage in the actuator module 2, thereby causing the piston of the actuator cylinder 42 to malfunction because it cannot overcome the spring force of the actuator cylinder spring 425.

[0065] Furthermore, when there is no compressed air in the compressed air chambers of the protection cylinder 41 and the actuator cylinder 42, the initial spring force of the protection cylinder spring 414 is at least three times the initial spring force of the actuator cylinder spring 425; when there is no compressed air in the compressed air chambers of the protection cylinder 41 and the actuator cylinder 42, the protection cylinder spring 414 and the actuator cylinder spring 425 are both released. Since the spring force of the protection cylinder spring 414 is greater, and the piston rod in the protection cylinder 41 extends into the actuator cylinder 42 and fits with the piston of the actuator cylinder 42, the piston and piston rod of the actuator cylinder 42 can be prevented from moving. Therefore, the piston rod of the actuator cylinder 42 will not pull the wire rope b, thereby avoiding the accidental release of the parking brake device.

[0066] Furthermore, a hand release pull ring d is provided near the bogie wheels on both sides of the vehicle. When the vehicle needs to be moved during maintenance work in the depot or after being parked for a long time, the parking brake device can be conveniently released by manually pulling the hand release pull ring d under the vehicle.

[0067] Further, the execution module 2 includes a one-way valve I 21, a solenoid valve 22 and a plug gate 23; the solenoid valve 22 includes an intake passage I (inlet P, outlet A) and an exhaust passage I (inlet B, outlet R);

[0068] The first interface of the one-way valve I 21 is connected to the air supply pipeline 1 through a pipeline, and the second interface is connected to the air intake passage I of the solenoid valve 22 through a pipeline;

[0069] The first connection port of the plug gate 23 is connected to the intake passage I and the exhaust passage I of the solenoid valve 22 through pipelines, respectively, and the second interface is connected to the compressed air chamber of the actuator cylinder 42 through a pipeline; the solenoid valve 22 is normally in a power-off state (that is, when the relief and effort-saving system is in a normal state, the solenoid valve 22 is in a power-off state), and when the parking brake device needs to be released, the solenoid valve 22 is controlled to be energized; when the solenoid valve 22 is power-off, the intake passage I is connected, the exhaust passage I is blocked, and the compressed air is filled into the compressed air chamber of the actuator cylinder 42 through the intake passage I; when the solenoid valve 22 is energized, the intake passage I is blocked, the exhaust passage I is connected, and the compressed air in the compressed air chamber of the actuator cylinder 42 is discharged through the exhaust passage I.

[0070] Furthermore, the compressed air can flow from the first interface of the one-way valve I21 and the one-way valve II31 to the second interface and cannot flow in the reverse direction.

[0071] Furthermore, when the solenoid valve 22 loses power, the compressed air from the air supply pipeline 1 is filled into the compressed air chamber of the actuator cylinder 42 through the one-way valve I21, the air intake passage I and the plug gate 23; when the solenoid valve 22 is energized, the compressed air in the compressed air chamber of the actuator cylinder 42 is discharged through the plug gate 23 and the exhaust passage I.

[0072] By adopting the labor-saving release system of the present invention, when the parking brake device needs to be released after an accidental application failure of the parking brake, the electromagnetic valve 22 is controlled to be energized, or the handle of the plug gate 23 is turned at the position on the vehicle corresponding to the bogie where the parking brake is accidentally applied, so that the compressed air in the compressed air chamber of the actuator cylinder 42 is exhausted, and under the action of the actuator cylinder spring 425, the piston rod of the actuator cylinder 42 can pull the wire rope b to release the parking brake device, without the need to operate the release pull ring d under the vehicle.

[0073] Furthermore, the labor-saving system a can be integrated into a whole and installed on the vehicle, or the plug door 23 can be installed on the vehicle and the remaining parts can be installed under the vehicle, and the air supply pipeline c can be connected to the air supply pipeline 1.

[0074] Furthermore, the plug door 23 is provided with an exhaust port and a handle for controlling the switch of the exhaust port, and the compressed air in the compressed air chamber of the actuator cylinder 42 can be discharged through the exhaust port opened by turning the handle.

[0075] Furthermore, the protection module 3 includes a one-way valve II 31, a throttle plug 32 and a pneumatic valve 33; the pneumatic valve 33 includes a pneumatic regulating port (port E), an air inlet passage II (port P in, port A out) and an exhaust passage II (port B in, port R out);

[0076] The second interface of the one-way valve I 21 is also connected to the first interface of the one-way valve II 31 and the pneumatic regulating port of the pneumatic valve 33 through pipelines; the pressure at the pneumatic regulating port is the same as the pressure at the air inlet of the air inlet passage I of the solenoid valve 22; the second interface of the one-way valve II 31 is connected to the first interface of the throttle plug 32 through a pipeline; the second interface of the throttle plug 32 is connected to the air inlet passage II of the pneumatic valve 33 through a pipeline;

[0077] The throttling plug 32 is used to slow down the speed of filling the compressed air into the compressed air cavity of the protection cylinder 41, so that the speed of filling the compressed air into the compressed air cavity of the protection cylinder 41 is lower than the speed of filling the compressed air into the compressed air cavity of the execution cylinder 42, so as to avoid malfunction of the piston of the execution cylinder 42;

[0078] The compressed air chamber of the protection cylinder 41 is connected to the air inlet passage II and the exhaust passage II of the pneumatic valve 33 through pipelines respectively;

[0079] The movement of the valve stem inside the pneumatic valve 33 is related to the pressure at the pneumatic regulating port. The pressure at the pneumatic regulating port corresponding to the movement of the valve stem is set to a set value. A spring for resetting the valve stem that has moved is also provided inside the pneumatic valve 33. The set value of the pressure at the pneumatic regulating port can be determined according to the selection of the pneumatic valve 33.

[0080] When the relief and labor-saving system is in a normal state or the parking brake device is released, the pressure at the pneumatic regulating port is greater than or equal to the set value, the valve stem is actuated, the air intake passage II is connected, the exhaust passage II is closed, and compressed air is filled into the compressed air chamber of the protection cylinder 41 through the air intake passage II;

[0081] When the relief and labor-saving system is in a normal state, but the gas pressure in the compressed air chamber of the actuator cylinder 42 decreases, the pressure at the air inlet of the intake passage I and the pressure at the pneumatic regulating port also decrease. When the pressure at the pneumatic regulating port decreases to less than the set value, the valve stem is reset under the action of the spring, the intake passage II is cut off, and the exhaust passage II is connected. The compressed air in the compressed air chamber of the protection cylinder 41 is discharged through the exhaust passage II to prevent the piston of the actuator cylinder 42 from malfunctioning. When the pressure at the pneumatic regulating port recovers from less than the set value to greater than or equal to the set value, the valve stem is actuated, the intake passage II is connected, the exhaust passage II is cut off, and compressed air is refilled into the compressed air chamber of the protection cylinder 41 through the intake passage II.

[0082] Further, in the present invention, when the relief and labor-saving system is in a normal state, the gas pressure in the compressed air chamber of the actuator cylinder 42 is the same as the gas pressure in the intake passage I, and at this time, the pressure at the pneumatic regulating port is the same as the pressure at the intake port of the intake passage I and is greater than or equal to the set value;

[0083] When the parking brake device is released, the gas pressure in the compressed air chamber of the actuator cylinder 42 decreases and becomes lower than the pressure at the air inlet of the air inlet passage I. At this time, the pressure at the pneumatic regulating port remains unchanged and is still greater than or equal to the set value.

[0084] When the relief and labor-saving system is in a normal state, but the gas pressure in the compressed air chamber of the actuator cylinder 42 decreases, the gas pressure in the intake passage I and the pressure at the pneumatic regulating port also decrease. When the pressure at the pneumatic regulating port decreases to less than the set value, the valve stem is reset under the action of the spring.

[0085] Furthermore, when the effort-saving system is in a normal state or the parking brake device is released, the compressed air from the air supply pipeline 1 is filled into the compressed air chamber of the protection cylinder 41 through the one-way valve I21, the one-way valve II31, the throttling plug 32 and the intake passage II; when the effort-saving system is in a normal state, but the gas pressure in the compressed air chamber of the actuator cylinder 42 is reduced, the compressed air in the compressed air chamber of the protection cylinder 41 is discharged through the exhaust passage II to prevent the piston of the actuator cylinder 42 from malfunctioning.

[0086] Furthermore, when the pressure at the pneumatic regulating port drops to less than a set value, the valve stem is reset under the action of a spring, so that the intake passage II is cut off and the exhaust passage II is connected; when the pressure at the pneumatic regulating port is restored from less than a set value to greater than or equal to the set value, the valve stem is actuated under the action of pressure and restored to a state in which the intake passage II is connected and the exhaust passage II is cut off.

[0087] Furthermore, the protection cylinder 41 further includes a protection cylinder body 411, a protection cylinder piston 415 and a protection cylinder piston rod 416; the execution cylinder 42 further includes an execution cylinder body 421, an execution cylinder piston rod 423 and an execution cylinder piston 426;

[0088] The protection cylinder body 411 and the actuator cylinder body 421 are both cup-shaped structures, and the inside is an axial two-stage stepped hole structure formed by a stepped platform, and the stepped hole structure includes a small diameter section and a large diameter section, and the small diameter section is close to the bottom of the protection cylinder body 411 and the actuator cylinder body 421;

[0089] The front end side walls of the large diameter sections of the protection cylinder body 411 and the actuator cylinder body 421 are respectively provided with a protection cylinder air inlet hole 418 and an actuator cylinder air inlet hole 428; the actuator module 2 and the protection module 3 are respectively connected to the actuator cylinder air inlet hole 428 and the protection cylinder air inlet hole 418;

[0090] The protection cylinder piston 415 and the actuator cylinder piston 426 are coaxially mounted in the large diameter sections of the protection cylinder body 411 and the actuator cylinder body 421 respectively;

[0091] The protection cylinder spring 414 is located between the protection cylinder piston 415 and the bottom of the protection cylinder body 411; the protection cylinder spring 414 is used to provide power for the protection cylinder piston 415 and the protection cylinder piston rod 416;

[0092] The actuator cylinder spring 425 is located between the actuator cylinder piston 426 and the bottom of the actuator cylinder body 421; the actuator cylinder spring 425 is used to provide power for the actuator cylinder piston 426 and the actuator cylinder piston rod 423;

[0093] The stepped platforms in the protection cylinder body 411 and the actuator cylinder body 421 are used to limit the axial movement positions of the protection cylinder piston 415 and the actuator cylinder piston 426, respectively, to avoid excessive compression of the protection cylinder spring 414 and the actuator cylinder spring 425;

[0094] One end of the protection cylinder piston rod 416 is fixedly connected to the protection cylinder piston 415, and the other end passes through the central hole of the connecting body 43 and extends into the actuator cylinder body 421, and the end surface is in contact with the actuator cylinder piston 426;

[0095] One end of the actuator cylinder piston rod 423 is fixedly connected to the actuator cylinder piston 426, and the other end passes through the actuator cylinder spring 425 and extends from the bottom of the actuator cylinder 42 to be connected to the wire rope b.

[0096] Furthermore, the second interface of the plug gate 23 is connected to the air inlet hole 428 of the actuator cylinder; the air inlet hole 418 of the protection cylinder is respectively connected to the air inlet passage II and the exhaust passage II of the pneumatic valve 33.

[0097] Furthermore, the connecting body 43 is a thick sheet-like structure, and a boss is axially arranged at the center of both sides of the connecting body 43; the protection cylinder air inlet hole 418 and the actuator cylinder air inlet hole 428 are respectively located on the front end side walls of the large diameter section corresponding to the boss in the protection cylinder body 411 and the actuator cylinder body 421; the two bosses are respectively used to limit the axial movement position of the protection cylinder piston 415 and the actuator cylinder piston 426 to prevent the protection cylinder piston 415 and the actuator cylinder piston 426 from blocking the protection cylinder air inlet hole 418 and the actuator cylinder air inlet hole 428 due to excessive stroke, resulting in poor air intake; in the protection cylinder body 411, the protection cylinder piston 415 moves axially between the step platform and the boss; in the actuator cylinder body 421, the actuator cylinder piston 426 moves axially between the step platform and the boss.

[0098] Furthermore, the relief device 4 also includes a sealing gasket 44 and a sealing ring 47, and the sealing ring 47 is installed on the inner wall of the center hole of the connecting body 43, and is used to seal between the protective cylinder piston rod 416 and the center hole to prevent the gas in the compressed air chambers of the protective cylinder 41 and the actuator cylinder 42 from circulating with each other.

[0099] Furthermore, the central hole of the connecting body 43 passes through the two bosses; the inner wall of the central hole is provided with a groove for installing the sealing ring 47.

[0100] Furthermore, the protection cylinder 41, the connecting body 43 and the actuator cylinder 42 are fixedly connected as a whole by bolts 45 and nuts 46, so that the relief device 4 has a more compact structure; the outer side of the connecting body 43 and the outer sides of the protection cylinder body 411 and the actuator cylinder body 421 near one end of the connecting body 43 are evenly arranged along the circumference with four mounting holes for installing the bolts 45.

[0101] Furthermore, the protection cylinder 41 also includes a protection cylinder adjustment bolt 412 and a protection cylinder adjustment block 413; the protection cylinder adjustment block 413 is a rotating body structure, which is concentrically installed in the small diameter section of the protection cylinder body 411; the protection cylinder piston 415 is a rotating body structure; the protection cylinder spring 414 is installed between the protection cylinder adjustment block 413 and the protection cylinder piston 415; the protection cylinder adjustment bolt 412 is installed in a threaded through hole opened in the bottom center of the protection cylinder body 411 and fits with the protection cylinder adjustment block 413; the protection cylinder adjustment bolt 412 and the protection cylinder adjustment block 413 cooperate to adjust the spring force of the protection cylinder spring 414.

[0102] Furthermore, the axial position of the protection cylinder adjustment block 413 in the small diameter section of the protection cylinder body 411 is adjusted by rotating the protection cylinder adjustment bolt 412 , so that the protection cylinder spring 414 is compressed or released, thereby adjusting the spring force of the protection cylinder spring 414 .

[0103] Furthermore, the actuator cylinder 42 also includes an actuator cylinder adjustment bolt 422 and an actuator cylinder adjustment block 424; the actuator cylinder adjustment block 424 is a rotating body structure, which is concentrically installed in the small diameter section of the actuator cylinder body 421; the actuator cylinder piston 426 is a rotating body structure; the actuator cylinder spring 425 is installed between the actuator cylinder adjustment block 424 and the actuator cylinder piston 426; the actuator cylinder adjustment bolt 422 is installed in a threaded through hole opened in the bottom center of the actuator cylinder body 421 and fits with the actuator cylinder adjustment block 424; the actuator cylinder adjustment bolt 422 and the actuator cylinder adjustment block 424 cooperate to adjust the spring force of the actuator cylinder spring 425; the centers of the actuator cylinder adjustment bolt 422 and the actuator cylinder adjustment block 424 are both provided with through holes for the actuator cylinder piston rod 423 to pass through.

[0104] Furthermore, the axial position of the actuator cylinder adjustment block 424 in the small diameter section of the actuator cylinder body 421 is adjusted by rotating the actuator cylinder adjustment bolt 422 , so that the actuator cylinder spring 425 is compressed or released, thereby adjusting the spring force of the actuator cylinder spring 425 .

[0105] Furthermore, one end of the actuator cylinder piston rod 423 is provided with an internal thread for connecting the wire rope b.

[0106] Furthermore, the side walls of the small diameter sections in the protection cylinder body 411 and the execution cylinder body 421 are respectively provided with breathing holes I 419 and breathing holes II 429, which are used to maintain internal and external pressure balance in the chambers where the breathing holes I 419 and the breathing holes II 429 are located. If no breathing holes are provided, when compressed air is filled into the chamber on one side of the piston in the cylinder body to make the piston move axially, the pressure in the chamber on the other side of the piston will gradually increase, thereby hindering the further movement of the piston.

[0107] Furthermore, the protection cylinder adjustment block 413 and the protection cylinder piston 415 are respectively provided with bosses along the axial direction for mounting the protection cylinder spring 414 ; the execution cylinder adjustment block 424 and the execution cylinder piston 426 are respectively provided with bosses along the axial direction for mounting the execution cylinder spring 425 .

[0108] Furthermore, locking nuts for locking the rotational position are respectively installed on the protection cylinder adjusting bolt 412 and the execution cylinder adjusting bolt 422 .

[0109] Furthermore, a protection cylinder sealing ring 417 for sealing is installed between the protection cylinder piston 415 and the inner wall of the protection cylinder body 411; an actuator cylinder sealing ring 427 for sealing is installed between the actuator cylinder piston 426 and the inner wall of the actuator cylinder body 421; and the sides of the protection cylinder piston 415 and the actuator cylinder piston 426 are respectively provided with a circle of grooves for installing the protection cylinder sealing ring 417 and the actuator cylinder sealing ring 427.

[0110] Furthermore, the protection cylinder piston 415 is provided with a threaded through hole along the axial direction for mounting the protection cylinder piston rod 416 ; the execution cylinder piston 426 is provided with a threaded through hole along the axial direction for mounting the execution cylinder piston rod 423 .

[0111] The present invention can replace manual labor through the spring action in the release device. When releasing the parking brake device, no manual pulling operation is required. The parking brake device can be released by controlling the action of the solenoid valve in the execution module or turning the plug door handle.

[0112] The working process of the parking brake manual remote relief labor-saving system of the present invention is as follows: Figure 6-8 As shown, it can be mainly divided into three states: normal state, parking brake device relief state and malfunction protection state;

[0113] (1) Normal state:

[0114] like Figure 6 and Figure 7As shown, the compressed air enters the actuator cylinder 42 through the one-way valve Ⅰ21, the air inlet passage Ⅰ of the solenoid valve 22 and the plug gate 23 through the actuator cylinder air inlet hole 428, compressing the actuator cylinder spring 425 to make the actuator cylinder piston 426 at the upper limit position, at which time the wire rope b is not subjected to force;

[0115] The compressed air in the execution module 2 acts on the pneumatic regulating port (E port) of the pneumatic valve 33. After the pressure of the pneumatic regulating port is greater than or equal to the set value, the compressed air from the air supply pipeline 1 enters the protection cylinder 41 through the one-way valve I21, the one-way valve II31, the throttling plug 32, the air intake passage II of the pneumatic valve 33 and the air intake hole 418 of the protection cylinder, and also compresses the protection cylinder spring 414, so that the protection cylinder piston 415 is in the lower limit position; since the action setting values ​​of the throttling plug 32 and the pneumatic valve 33 are set, the speed of charging the protection cylinder 41 is much smaller than the speed of charging the execution cylinder 42, which can avoid the malfunction of the execution cylinder piston 426.

[0116] (2) When it is necessary to release the parking brake:

[0117] like Figure 6 and 8 As shown, by controlling the electromagnetic valve 22 to be energized, the compressed air in the actuator cylinder 42 is discharged to the atmosphere through the exhaust passage I of the electromagnetic valve 22, or to the position on the vehicle corresponding to the bogie where the parking brake is accidentally applied, and by turning the handle of the plug door 23, the compressed air in the lower chamber of the actuator cylinder 42 is discharged through the exhaust port of the plug door 23, and the spring force of the actuator cylinder spring 425 in the actuator cylinder 42 is released, pushing the actuator cylinder piston 426 to move, pulling the wire rope b to release the parking brake device; during the whole process, the operator only needs to control the action of the electromagnetic valve 22 or turn the handle of the plug door 23, without the need to pull the wire rope b laboriously or get off the vehicle to operate;

[0118] After the parking brake device is released, the solenoid valve 22 is restored to the de-energized state or the gate valve 23 is restored to the state, so that the compressed air is refilled into the actuator cylinder 42, overcoming the spring force of the actuator cylinder spring 425, and the actuator cylinder piston 426 returns to the upper limit position, and the entire device is restored to the normal state. In the above process, the pneumatic regulating port pressure of the pneumatic valve 33 is still greater than or equal to the set value, the valve stem remains in action, and the compressed air is kept being filled into the protection cylinder 41.

[0119] (3) Malfunction protection status:

[0120] When the vehicle is parked for a long time or the execution module 2 leaks, the compressed air pressure in the execution module 2 gradually decreases, which causes the pressure of the pneumatic regulating port of the pneumatic valve 33 to be lower than the set value. At this time, the valve stem of the pneumatic valve 33 moves under the action of the internal spring, so that the compressed air in the protection cylinder 41 is discharged into the air through the exhaust passage II of the pneumatic valve 33. The protection cylinder piston 415 moves under the action of the spring force and acts on the lower surface of the execution cylinder piston 426, so that the execution cylinder piston 426 is still in the upper limit position (such as Figure 3 When the compressed air pressure in the execution module 2 is restored, the pressure at the pneumatic regulating port of the pneumatic valve 33 is restored to be greater than or equal to the set value, and the entire system is restored to the normal state.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A parking brake manual remote relief effort-saving system, characterized in that: It comprises an air supply pipeline (1), an execution module (2), a protection module (3) and a relief device (4); The relief device (4) comprises a protection cylinder (41) and an actuator cylinder (42) which are fixedly connected to each other via a connecting body (43); a piston structure is installed in each of the protection cylinder (41) and the actuator cylinder (42), and the interior is divided into a compressed air chamber and a spring installation chamber by the piston structure; the compressed air chambers of the protection cylinder (41) and the actuator cylinder (42) are adjacent; the piston structure comprises a piston and a piston rod; a protection cylinder spring (414) is installed in the spring installation chamber of the protection cylinder (41); the piston rod of the protection cylinder (41) passes through the connecting body (43) and extends into the compressed air chamber of the actuator cylinder (42), and fits with the piston of the actuator cylinder (42); an actuator cylinder spring (425) is installed in the spring installation chamber of the actuator cylinder (42); the piston rod of the actuator cylinder (42) passes through the actuator cylinder spring (425) and extends from the bottom of the actuator cylinder (42), and is connected to the parking brake device on the basic brake device of the vehicle through a wire rope; The air supply pipeline (1) is used to provide compressed air; the air supply pipeline (1) is connected to the compressed air chambers of the execution cylinder (42) and the protection cylinder (41) through the execution module (2) and the protection module (3) respectively; the execution module (2) is used to control the filling or discharge of compressed air into the compressed air chamber of the execution cylinder (42); The protection module (3) is used to control the filling or discharge of compressed air into or from the compressed air cavity of the protection cylinder (41); When the labor-saving system is in a normal state, compressed air is respectively charged into the compressed air chambers of the execution cylinder (42) and the protection cylinder (41) through the execution module (2) and the protection module (3); When the parking brake device needs to be released, the compressed air chamber of the execution cylinder (42) is controlled by the execution module (2) to discharge compressed air, and the piston rod of the execution cylinder (42) pulls the steel wire rope (b) to release the parking brake device; When the labor-saving system is in a normal state but the gas pressure in the compressed air chamber of the actuator cylinder (42) decreases, the compressed air chamber of the protection cylinder (41) is controlled by the protection module (3) to discharge the compressed air, thereby preventing the piston of the actuator cylinder (42) from malfunctioning.

2. The parking brake manual remote release effort-saving system according to claim 1, characterized in that: When there is no compressed air in the compressed air chambers of the protection cylinder (41) and the execution cylinder (42), the initial spring force of the protection cylinder spring (414) is at least three times the initial spring force of the execution cylinder spring (425).

3. The parking brake manual remote release effort-saving system according to claim 1, characterized in that: The execution module (2) comprises a one-way valve I (21), a solenoid valve (22) and a plug valve (23); the solenoid valve (22) comprises an intake passage I and an exhaust passage I; The first interface of the one-way valve I (21) is connected to the air supply pipeline (1), and the second interface is connected to the air intake passage I of the solenoid valve (22); The first connection port of the plug gate (23) is respectively connected to the air intake passage I and the exhaust passage I of the solenoid valve (22), and the second connection port is connected to the compressed air chamber of the actuator cylinder (42); the solenoid valve (22) is in a normally de-energized state, and when the parking brake device needs to be released, the solenoid valve (22) is controlled to be energized; when the solenoid valve (22) is de-energized, the air intake passage I is connected, the exhaust passage I is closed, and compressed air is filled into the compressed air chamber of the actuator cylinder (42) through the air intake passage I; When the solenoid valve (22) is energized, the air intake passage I is cut off, the exhaust passage I is opened, and the compressed air in the compressed air chamber of the actuator cylinder (42) is discharged through the exhaust passage I.

4. The parking brake manual remote release effort-saving system according to claim 3, characterized in that: The plug door (23) is provided with an exhaust port and a handle for controlling the opening and closing of the exhaust port.

5. The parking brake manual remote release effort-saving system according to claim 3, characterized in that: The protection module (3) comprises a one-way valve II (31), a throttle plug (32) and a pneumatic valve (33); the pneumatic valve (33) comprises a pneumatic regulating port, an air intake passage II and an air exhaust passage II; The second interface of the one-way valve I (21) is also connected to the first interface of the one-way valve II (31) and the pneumatic regulating port of the pneumatic valve (33) respectively; the pressure at the pneumatic regulating port is the same as the pressure at the air inlet of the air inlet passage I of the solenoid valve (22); the second interface of the one-way valve II (31) is connected to the first interface of the throttle plug (32); the second interface of the throttle plug (32) is connected to the air inlet passage II of the pneumatic valve (33); The throttling plug (32) is used to slow down the speed of charging compressed air into the compressed air chamber of the protection cylinder (41), so that the speed of charging compressed air into the compressed air chamber of the protection cylinder (41) is lower than the speed of charging compressed air into the compressed air chamber of the execution cylinder (42); The compressed air chamber of the protection cylinder (41) is respectively connected to the air inlet passage II and the air outlet passage II of the pneumatic valve (33); The movement of the valve stem inside the pneumatic valve (33) is related to the pressure at the pneumatic regulating port, and the pressure at the pneumatic regulating port corresponding to the movement of the valve stem is set to a set value. The pneumatic valve (33) is also provided with a spring for resetting the valve stem when the valve stem moves. When the relief and labor-saving system is in a normal state or the parking brake device is released, the pressure at the pneumatic regulating port is greater than or equal to a set value, the valve stem is actuated, the air intake passage II is connected, the exhaust passage II is closed, and compressed air is filled into the compressed air chamber of the protection cylinder (41) through the air intake passage II; When the relief and labor-saving system is in a normal state, but the gas pressure in the compressed air chamber of the actuator cylinder (42) decreases, the pressure at the air inlet of the air inlet passage I and the pressure at the pneumatic regulating port also decrease. When the pressure at the pneumatic regulating port decreases to less than the set value, the valve stem is reset under the action of the spring, the air inlet passage II is cut off, the exhaust passage II is connected, and the compressed air in the compressed air chamber of the protection cylinder (41) is discharged through the exhaust passage II to prevent the piston of the actuator cylinder (42) from malfunctioning; when the pressure at the pneumatic regulating port recovers from less than the set value to greater than or equal to the set value, the valve stem is actuated, the air inlet passage II is connected, the exhaust passage II is cut off, and the compressed air chamber of the protection cylinder (41) is refilled with compressed air through the air inlet passage II.

6. The parking brake manual remote release effort-saving system according to claim 1, characterized in that: The protection cylinder (41) further comprises a protection cylinder body (411), a protection cylinder piston (415) and a protection cylinder piston rod (416); the execution cylinder (42) further comprises an execution cylinder body (421), an execution cylinder piston rod (423) and an execution cylinder piston (426); The interior of the protection cylinder body (411) and the actuator cylinder body (421) is an axial two-stage stepped hole structure formed by a stepped platform, and the stepped hole structure includes a small diameter section and a large diameter section, and the small diameter section is close to the bottom of the protection cylinder body (411) and the actuator cylinder body (421); The front end side walls of the large diameter sections of the protection cylinder body (411) and the actuator cylinder body (421) are respectively provided with a protection cylinder air inlet hole (418) and an actuator cylinder air inlet hole (428); the actuator module (2) and the protection module (3) are respectively connected to the actuator cylinder air inlet hole (428) and the protection cylinder air inlet hole (418); The protection cylinder piston (415) and the actuator cylinder piston (426) are respectively installed concentrically in the large diameter sections of the protection cylinder body (411) and the actuator cylinder body (421); The protection cylinder spring (414) is located between the protection cylinder piston (415) and the bottom of the protection cylinder body (411); the protection cylinder spring (414) is used to provide power for the protection cylinder piston (415) and the protection cylinder piston rod (416); The actuator cylinder spring (425) is located between the actuator cylinder piston (426) and the bottom of the actuator cylinder body (421); the actuator cylinder spring (425) is used to provide power for the actuator cylinder piston (426) and the actuator cylinder piston rod (423); The stepped platforms in the protection cylinder body (411) and the actuator cylinder body (421) are used to limit the axial movement positions of the protection cylinder piston (415) and the actuator cylinder piston (426), respectively; One end of the protection cylinder piston rod (416) is fixedly connected to the protection cylinder piston (415), and the other end passes through the central hole of the connecting body (43) and extends into the actuator cylinder body (421), and the end surface is in contact with the actuator cylinder piston (426); One end of the actuator cylinder piston rod (423) is fixedly connected to the actuator cylinder piston (426), and the other end passes through the actuator cylinder spring (425) and extends from the bottom of the actuator cylinder (42) to be connected to the steel wire rope.

7. The parking brake manual remote release effort-saving system according to claim 6, characterized in that: A boss is axially arranged at the center of both sides of the connecting body (43); the protective cylinder air inlet hole (418) and the actuator cylinder air inlet hole (428) are respectively located on the front end side walls of the large diameter section corresponding to the boss in the protective cylinder body (411) and the actuator cylinder body (421); the two bosses are respectively used to limit the axial movement position of the protective cylinder piston (415) and the actuator cylinder piston (426).

8. The parking brake manual remote release effort-saving system according to claim 6, characterized in that: The protection cylinder (41) further comprises a protection cylinder adjustment bolt (412) and a protection cylinder adjustment block (413); the protection cylinder adjustment block (413) is coaxially mounted in the small diameter section of the protection cylinder body (411); the protection cylinder spring (414) is mounted between the protection cylinder adjustment block (413) and the protection cylinder piston (415); the protection cylinder adjustment bolt (412) is mounted in a threaded through hole provided at the center of the bottom of the protection cylinder body (411) and is fitted with the protection cylinder adjustment block (413); the protection cylinder adjustment bolt (412) and the protection cylinder adjustment block (413) are matched to adjust the spring force of the protection cylinder spring (414).

9. The parking brake manual remote release effort-saving system according to claim 6, characterized in that: The actuator cylinder (42) further comprises an actuator cylinder adjustment bolt (422) and an actuator cylinder adjustment block (424); the actuator cylinder adjustment block (424) is coaxially mounted in the small diameter section of the actuator cylinder body (421); the actuator cylinder spring (425) is mounted between the actuator cylinder adjustment block (424) and the actuator cylinder piston (426); the actuator cylinder adjustment bolt (422) is mounted in a threaded through hole opened in the center of the bottom of the actuator cylinder body (421) and fits with the actuator cylinder adjustment block (424); the actuator cylinder adjustment bolt (422) and the actuator cylinder adjustment block (424) cooperate to adjust the spring force of the actuator cylinder spring (425); the centers of the actuator cylinder adjustment bolt (422) and the actuator cylinder adjustment block (424) are both provided with through holes for the actuator cylinder piston rod (423) to pass through.

10. The parking brake manual remote release effort-saving system according to claim 6, characterized in that: The side walls of the small diameter sections in the protection cylinder body (411) and the execution cylinder body (421) are respectively provided with a breathing hole I (419) and a breathing hole II (429) for maintaining internal and external pressure balance in the chambers where the breathing hole I (419) and the breathing hole II (429) are located.

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