Manual release device and railway vehicle parking cylinder

Abstract

The manual relieving device comprises a body shell, a guide block and a pulling part, the body shell comprises a stroke groove, the stroke groove is formed in the first surface of the body shell, the guide block is located in the stroke groove, the guide block is connected with the pulling part, and the pulling part is arranged on the first surface of the body shell. The pulling part drives the guide block to move along the stroke groove; and a deflection part is further included, one end of the deflection part is hinged to the guide block, and when the guide block moves along the stroke groove, the position of the deflection part is relatively deflected, so that manual relieving operation is conducted. The manual relieving device is simple in structure, high in reliability and capable of reducing manual relieving force.

Description

Technical Field

[0001] The utility model relates to the field of rail transit vehicle braking, in particular to a manual relief device and a rail vehicle parking cylinder. Background Art

[0002] The braking system is a crucial component of rail transit vehicles, ensuring the vehicle's smooth transition from normal operation to a stop. The parking brake cylinder includes a unit brake cylinder and a parking cylinder, which require a manual release mechanism. The manual release mechanism is a crucial component of the parking brake unit. In actual operation, when the vehicle's parking brake needs to be released, the manual release mechanism is often pulled by pulling the manual release mechanism's pull cord, which activates the manual release mechanism's movable components, releasing the brake caliper unit's parking brake cylinder. The performance of the manual release mechanism directly impacts the proper functioning of the vehicle's parking brake release function, requiring it to exhibit excellent reliability.

[0003] Due to an unreasonable structure within the parking brake cylinder, the hand release rope mechanism suffers from uneven force distribution and ineffective hand release during braking. During braking on slopes, the brakes cannot be released or the release fails, causing the parking clamp unit to fail to operate.

[0004] The prior art CN206409553U discloses a manual release device for a vehicle parking cylinder, comprising a manual release device fixed on the outer wall of the parking cylinder, the manual release device having a cavity, a pull pin being provided in the cavity, the pull pin being composed of a pull pin rod body and a pull pin main body, the pull pin rod body being provided with a pull pin reset spring, the upper end of the pull pin rod body being connected to a manual release rope, and the input force is transmitted through the inclined surface of the pull pin, thereby achieving amplification of the force value, reducing the required manual release tension, and making the operation reliable and labor-saving, and the range of input force required for manual release can be achieved by adjusting the inclined surface angle and the pull pin reset spring force.

[0005] Prior art CN107499333A discloses a manual release mechanism. The mechanism includes a pull cable connected to a ratchet pawl via a lever mechanism. The lever mechanism includes a cam mechanism connected to the pull cable and rotatable when subjected to tension from the cable. During rotation, the cam mechanism engages the ratchet pawl to control the ratchet pawl's disengagement from the ratchet teeth. This design changes the connection between the parking brake cylinder manual release mechanism and the ratchet pawl, employing a lever-cam amplification mechanism within a confined space, effectively reducing the manual release force required for the parking brake.

[0006] The above hand relief devices are all complex in structure and require the design of various components to reduce the manual relief tension. The relief action is complex and the overall reliability of the hand relief device is not high.

[0007] In view of the above technical problems, the present utility model is introduced. Summary of the Invention

[0008] The main purpose of the utility model is to provide a hand release device with a simple and reliable structure to solve the situation that the hand release function of the parking clamp unit brake often fails and can reduce the manual release force.

[0009] To achieve the above-mentioned object, according to one aspect of the present invention, a manual relief device is proposed, comprising a main body shell, a guide block and a pulling portion, wherein the main body shell comprises a travel groove, the travel groove being provided on a first surface of the main body shell, the guide block being located in the travel groove, the guide block being connected to the pulling portion, and the pulling portion driving the guide block to move along the travel groove;

[0010] It also includes a deflection part, one end of the deflection part is hinged to the guide block, and the other end of the deflection part is located outside the guide block. When the guide block moves along the stroke groove, the position of the deflection part is relatively deflected to perform manual relief operation.

[0011] Furthermore, the deflection part includes a sliding pin, the sliding pin includes a pin tube and a pin seat, the pin seat is fixedly connected to the first end of the pin tube, the pin seat is located on the circumferential outside of the pin tube, the pin seat includes a first pin hole, and the direction of the first pin hole is perpendicular to the direction of the pin tube.

[0012] Furthermore, the guide block includes a hollow portion, which is used to accommodate the first end of the pin tube and the pin seat. A second pin hole is opened on the inner wall of the hollow portion. The direction of the second pin hole is perpendicular to the moving direction of the guide block, and the second pin hole is coaxial with the first pin hole.

[0013] Furthermore, the manual relief device also includes an elastic pin, which passes through the first pin hole and the second pin hole. The elastic pin enables the sliding pin to be hinged in the guide block.

[0014] Furthermore, the manual relief device also includes a deflection shaft, which includes a rotating shaft rod and a deflection disk. The deflection disk is fixedly connected to the first end of the rotating shaft rod, the deflection disk is perpendicular to the rotating shaft rod, and the second end of the rotating shaft rod is inserted into the second end of the pin tube. The outer peripheral surface of the rotating shaft rod is gap-matched with the inner wall of the pin tube.

[0015] Furthermore, the diameter of the rotating shaft is in the range of 7 to 8.5 mm, the outer diameter of the pin tube is in the range of 11 to 12.5 mm, and the inner diameter of the pin tube is in the range of 7 to 8.5 mm.

[0016] Furthermore, the length of the deflection shaft ranges from 60 to 65 mm, and the length of the sliding pin ranges from 56 to 61 mm.

[0017] Furthermore, the travel groove limits the initial position and the end position of the guide block. When the guide block is at the initial position, the direction of the pin tube is perpendicular to the first surface of the main body shell. When the guide block moves from the initial position to the end position, the pin tube produces an angular deflection.

[0018] Furthermore, the range of the deflection angle α of the pin tube is: 0°<α≤24°.

[0019] Furthermore, the range of the maximum deflection angle β generated by the pin tube is: 15°≤β≤22°.

[0020] Furthermore, the manual relief device also includes a reset spring, the two ends of which are respectively connected to the guide block and the main body shell. When the pulling part does not apply a pulling force to the guide block, the reset spring keeps the guide block in the initial position.

[0021] Furthermore, the pulling portion includes two or more parallel cables, the guide block includes two or more guide block cable grooves, one end of the cable is located in the guide block cable groove, and the direction of the cable is along the moving direction of the guide block.

[0022] Furthermore, the main body shell also includes a plurality of cable through holes, which extend from the inner wall of the travel groove to the side wall of the main body shell. The plurality of cable through holes are respectively used to accommodate a plurality of cables, and the cable through holes have step surfaces therein.

[0023] Furthermore, the cable includes a cable sleeve and a cable. The cable sleeve is provided on at least part of the outer periphery of the cable. The cable can move relative to the cable sleeve. The end of the cable includes a ball head. The ball head is limited by the cable groove of the guide block, and the step surface cooperates with the cable sleeve.

[0024] The application of the technical solution of the utility model achieves at least the following beneficial effects:

[0025] 1. The manual relief device of the present invention sets a deflection part and designs the specific structure of the deflection part. By pulling the guide block to move in the stroke groove, the deflection part can produce a certain deflection angle, thereby realizing the brake relief action, making the manual relief body structure simple, the action simple, and the reliability high.

[0026] 2. The manual relief device of the present invention includes a deflection part including a deflection shaft and a sliding pin. The deflection shaft is used to extend into the parking cylinder to perform the relief operation, and the sliding pin is used to connect the deflection shaft and the guide block, which is convenient for the installation of the manual relief device and forms a force arm structure. By changing the length of the deflection shaft and the length of the sliding pin, the manual relief pulling force can be effectively reduced, which is more labor-saving.

[0027] 3. The manual relief device of the present invention is adapted to the shape of the rectangular guide block by setting a rectangular travel groove on the first surface of the main body shell, and setting a reset spring on one side of the guide block and multiple cables on the other side. It ensures that under a certain pulling force, the guide block slides the full stroke cavity distance and returns to the initial position in a no-tension state, thereby ensuring the accuracy of the deflection angle.

[0028] 4. The manual relief device of the utility model can effectively disperse the pulling force and ensure that the guide block is evenly stressed by setting multiple cables, further improving reliability. By setting a step surface in the cable through hole to limit the movement of the cable sleeve, various problems caused by cable bending during use can be effectively avoided.

[0029] In order to achieve the above-mentioned purpose, according to another aspect of the present invention, a rail vehicle parking cylinder is proposed, including the manual release device according to the above-mentioned method, the parking cylinder also includes a thrust rod assembly, the thrust rod assembly passes through the axis of the parking cylinder, and one axial end of the thrust rod assembly has an opening, and the deflection part of the manual release device passes through the opening and cooperates with the interior of the thrust rod assembly.

[0030] Furthermore, the parking cylinder also includes a padding sleeve and a parking cylinder cover. The padding sleeve is installed between the manual relief device and the parking cylinder cover. The padding sleeve includes a sleeve through hole. The deflection part passes through the sleeve through hole and extends into the thrust rod assembly.

[0031] The application of the technical solution of the utility model achieves at least the following beneficial effects:

[0032] 1. The manual relief device of the present invention sets a deflection part and designs the specific structure of the deflection part. By pulling the guide block to move in the stroke groove, the deflection part can produce a certain deflection angle, thereby realizing the brake relief action. The manual relief body has a simple structure, easy operation and high reliability.

[0033] 2. The manual relief device of the present invention includes a deflection part including a deflection shaft and a sliding pin. The deflection shaft is used to extend into the parking cylinder to perform the relief operation, and the sliding pin is used to connect the deflection shaft and the guide block, which is convenient for the installation of the manual relief device and forms a force arm structure. By changing the length of the deflection shaft and the length of the sliding pin, the manual relief pulling force can be effectively reduced, which is more labor-saving.

[0034] 3. The manual relief device of the present invention is adapted to the shape of the rectangular guide block by setting a rectangular travel groove on the first surface of the main body shell, and setting a reset spring on one side of the guide block and multiple cables on the other side. It ensures that under a certain pulling force, the guide block slides the full stroke cavity distance and returns to the initial position in a no-tension state, thereby ensuring the accuracy of the deflection angle.

[0035] 4. The manual relief device of the utility model can effectively disperse the pulling force and ensure that the guide block is evenly stressed by setting multiple cables, further improving reliability. By setting a step surface in the cable through hole to limit the movement of the cable sleeve, various problems caused by cable bending during use can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 A top view of a manual release device (without the deflection axis) is shown in one embodiment;

[0038] Figure 2 A bottom view of a manual release device is shown in one embodiment;

[0039] Figure 3 A front view showing a guide block of a manual release device according to an embodiment is shown in an initial position;

[0040] Figure 4 A schematic diagram showing a guide block of a manual relief device according to an embodiment is shown in an end position;

[0041] Figure 5 A front cross-sectional view of a manual release device (without the pull cable) is shown in one embodiment;

[0042] Figure 6 A schematic diagram of a guide block according to an embodiment is shown;

[0043] Figure 7 A schematic diagram of a sliding pin according to one embodiment is shown;

[0044] Figure 8 A schematic diagram of a deflection axis according to an embodiment is shown;

[0045] Figure 9 A partial cross-sectional view of a parking cylinder is shown in one embodiment; Figure 10 A schematic diagram of a raised sheath according to an embodiment is shown;

[0046] Figure 11 A schematic diagram of a cable according to an embodiment is shown.

[0047] The above drawings include the following reference numerals:

[0048] 1. Body shell; 2. Guide block; 3. Cable; 4. Travel groove; 5. Sliding pin; 6. Pin tube; 7. Pin seat; 8. First pin hole; 9. Second pin hole; 10. Deflection shaft; 11. Rotating shaft rod; 12. Deflection plate; 13. Return spring; 14. Guide block cable groove; 15. Cable through hole; 16. Heightening sleeve; 17. Sheath through hole; 18. Step surface; 19. Cable sleeve; 20. Draw rope; 21. Ball head; 22. Thrust rod assembly; 23. Parking cylinder head. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention 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] The present invention is further described in detail below with reference to specific embodiments. These embodiments are not to be construed as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the presence of a feature, but does not exclude the presence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for ease of description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be construed as limiting the present invention; in addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance.

[0051] In this description, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0052] Example:

[0053] The utility model proposes a manual relief device, such as Figure 1 As shown, the device comprises a main housing 1, a guide block 2, and a pull member. The main housing 1 includes a travel slot 4 formed on a first surface of the main housing 1. The guide block 2 is positioned within the travel slot 4 and is connected to the pull member, which drives the guide block 2 along the travel slot 4.

[0054] Preferably, the guide block 2 is designed as a rectangular guide block, and the travel groove 4 is opened as a rectangular groove. The width of the rectangular groove is the same as that of the guide block, and the length of the rectangular groove is greater than the length of the guide block, so that the guide block 2 is better adapted to the travel groove 4 and the sliding range of the rectangular guide block is accurately limited.

[0055] Preferably, combined Figure 1-Figure 2As shown, based on the weight reduction requirements and minimalist design concept of this manual release device, the first surface with the travel slot is designed to be flat. On the back of the first surface, protrusions are designed at the corresponding positions to accommodate the travel slot and the pulling portion, while the remaining positions are still thin layers to reduce the overall weight of the manual release device.

[0056] Combine Figure 3 and Figure 4 As shown, in this application, the manual release device includes a deflection portion, one end of which is hinged to the guide block 2, and the other end of the deflection portion is located outside the guide block 2. After the manual release device is installed on the parking cylinder, the other end of the deflection portion is inserted into the parking cylinder, and its position is subject to certain restrictions. In this way, when the guide block 2 moves along the travel groove 4, the position of the deflection portion is relatively deflected to perform the manual release operation.

[0057] The manual relief device of the utility model sets a deflection part and designs the specific structure of the deflection part. By pulling the guide block to move in the stroke groove, the deflection part can produce a certain deflection angle, thereby realizing the brake relief action. The manual relief body has a simple structure, easy operation and high reliability.

[0058] Specifically, in this embodiment, the deflection portion includes two parts: a sliding pin 5 and a deflection shaft 10. Figure 7 As shown, the sliding pin 5 comprises a pin tube 6 and a pin seat 7. The pin tube 6 is hollow and tubular. The pin seat 7 is fixedly connected to the first end of the pin tube 6. The second end of the pin tube 6 is connected to the deflection shaft 10. The pin seat 7 is located circumferentially outside the pin tube 6 and includes a first pin hole 8, which is oriented perpendicular to the direction of the pin tube 6. Placing the pin seat circumferentially outside the pin tube not only increases the sliding pin's rotation angle but also improves the reliability of the sliding pin, prevents stress concentration, and increases its service life.

[0059] In addition, if Figure 6 As shown, the guide block 2 includes a hollow portion that passes through the guide block, the hollow portion is used to accommodate the first end of the pin tube 6 and the pin seat 7, and a second pin hole 9 is opened on the inner wall of the hollow portion. The direction of the second pin hole 9 is perpendicular to the moving direction of the guide block 2, and the second pin hole 9 is coaxial with the first pin hole 8.

[0060] Combine Figure 5 As shown, the manual release device further includes an elastic pin, which passes through the first pin hole 8 and the second pin hole 9 . The elastic pin enables the sliding pin 5 to be hinged in the guide block 2 .

[0061] In addition, if Figure 8 As shown, the deflection shaft 10 includes a rotating shaft rod 11 and a deflection plate 12. The deflection plate 12 is fixedly connected to the first end of the rotating shaft rod 11, and the deflection plate 12 is perpendicular to the rotating shaft rod 11. Figure 3As shown, the second end of the shaft rod is inserted into the second end of the pin tube 6, connecting the deflection shaft 10 to the sliding pin 5. The outer circumference of the shaft rod 11 is loosely matched with the inner wall of the pin tube 6. When the deflection part deflects, the deflection shaft 10 and the sliding pin 5 deflect together.

[0062] The deflection shaft and sliding pin form a moment arm structure. Testing has shown that varying the length ratio of the deflection shaft 10 to the sliding pin 5 can reduce tension. The diameter of the shaft rod 11 ranges from 7 to 8.5 mm, the outer diameter of the pin tube 6 ranges from 11 to 12.5 mm, and the inner diameter of the pin tube 6 ranges from 7 to 8.5 mm. The length of the deflection shaft 10 ranges from 60 to 65 mm, and the length of the sliding pin 5 ranges from 56 to 61 mm.

[0063] Preferably, the diameter of the rotating shaft rod 11 is selected to be 8 mm, the outer diameter of the pin tube 6 is 12 mm, the inner diameter is 8 mm, the length of the deflection shaft 10 is 63 mm, and the length of the sliding pin 5 is 59 mm, which has a better effect of reducing tension.

[0064] The manual release device of this utility model comprises a deflection unit comprising a deflection shaft and a sliding pin. The deflection shaft is used to extend into the parking cylinder to perform the release operation, while the sliding pin is used to connect the deflection shaft and the guide block, thereby facilitating installation of the manual release device. Furthermore, the deflection shaft and the sliding pin form a lever arm structure. By varying the length of the deflection shaft and the sliding pin, the manual release force can be effectively reduced, thus saving effort.

[0065] Combine Figure 3 and Figure 4 As shown, the travel groove 4 limits the initial position and the end position of the guide block 2. Preferably, when the guide block 2 is in the initial position, that is, when the pulling part does not apply a pulling force to the guide block 2, the direction of the pin tube 6 is perpendicular to the first surface of the main body shell 1. When the pulling part pulls the guide block 2 to the end position, the pin tube 6 generates a maximum deflection of a fixed angle.

[0066] Preferably, the deflection angle α of the pin tube 6 is within the range of 0° < α ≤ 24°. This means that the theoretical maximum deflection angle of the pin tube is 24°. However, during use of the manual release device, the pin tube can be designed to deflect within the range of 15° to 22° to achieve release. In other words, when the guide block moves to its end position, the maximum fixed deflection angle β of the pin tube is designed to be within the range of 15° ≤ β ≤ 22°.

[0067] Combine Figure 1 and Figure 5 As shown, the manual relief device also includes a reset spring 13, the two ends of which are respectively connected to the guide block 2 and the main body shell 1. When the pulling part does not apply tension to the guide block 2, the reset spring 13 keeps the guide block 2 in the initial position.

[0068] Preferably, combined Figure 5 and Figure 6 As shown, a spring fixing portion is preferably provided on the main body housing near the initial position of the guide block in the travel slot 4. A spring hole is provided at the center of one side of the guide block. One end of a return spring 13 is fixed to the spring fixing portion, and the other end is inserted into the spring hole and fixedly connected to the interior of the guide block 2. Regardless of the position of the guide block in the travel slot, the return spring 13 is always in a stretched state and has a tendency to contract.

[0069] like Figure 1 As shown in FIG, the pulling portion includes two or more mutually parallel cables 3. Figure 6 As shown, the guide block 2 includes two or more guide block cable grooves 14, one end of the cable 3 is located in the guide block cable groove 14, and the direction of the cable 3 is along the moving direction of the guide block 2. Preferably, the two guide block cable grooves 14 are respectively located on both sides of the guide block and can limit the cable.

[0070] The manual relief device of the present invention is adapted to the shape of the rectangular guide block by arranging a rectangular travel groove on the first surface of the main body shell, and arranging a reset spring on one side of the guide block and multiple cables on the other side, thereby ensuring that under a certain pulling force, the guide block slides the full stroke cavity distance and returns to the initial position in a no-tension state, thereby ensuring the accuracy of the deflection angle.

[0071] Further, such as Figure 5 As shown, the main body shell 1 further includes a plurality of cable through holes 15, which extend from the inner wall of the travel groove 4 to the side wall of the main body shell 1. The plurality of cable through holes 15 are respectively used to accommodate a plurality of cables 3. This design structure is simple, reliable, and has good use effect.

[0072] Preferably, if Figure 5 As shown, the cable through hole 15 has a step surface 18. Figure 11 As shown, the cable 3 includes a cable sleeve 19 and a cable 20. The cable sleeve 19 is provided on at least part of the outer periphery of the cable 20. The cable 20 can move relative to the cable sleeve 19. The end of the cable 20 includes a ball head 21. The ball head 21 is limited by the cable groove 14 of the guide block, and the step surface 18 cooperates with the cable sleeve 19.

[0073] The manual relief device of the utility model can effectively disperse the pulling force and ensure that the guide block is evenly stressed by setting a plurality of cables, thereby further improving reliability. By setting a step surface in the cable through hole to limit the movement of the cable sleeve, various problems caused by cable bending during use can be effectively avoided.

[0074] In other embodiments of the present invention, a rail vehicle parking cylinder is proposed, such as Figure 9As shown, the manual release device described above is included. The parking cylinder also includes a thrust rod assembly 22, which passes through the axis of the parking cylinder. One axial end of the thrust rod assembly 22 has an opening. The deflection portion of the manual release device passes through the opening and engages with the interior of the thrust rod assembly 22. The relative deflection of the deflection portion drives the relevant components within the thrust rod assembly 22, thereby completing the manual release process.

[0075] The parking cylinder also includes a raising sleeve 16 and a parking cylinder cover 23. The raising sleeve 16 is installed between the manual release device and the parking cylinder cover 23. The raising sleeve 16 is used to raise the position of the manual release device. Figure 10 As shown, the step-up shield 16 includes a shield through hole 17 , and the deflecting portion extends through the shield through hole 17 into the thrust rod assembly 22 .

[0076] In summary, from the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0077] 1. The manual relief device of the present invention sets a deflection part and designs the specific structure of the deflection part. By pulling the guide block to move in the stroke groove, the deflection part can produce a certain deflection angle, thereby realizing the brake relief action. The manual relief body has a simple structure, easy operation and high reliability.

[0078] 2. The manual relief device of the present invention is provided with a deflection part including a deflection shaft and a sliding pin. The deflection shaft is used to extend into the parking cylinder to perform the relief operation. The sliding pin is used to connect the deflection shaft and the guide block, which is convenient for the installation of the manual relief device and forms a force arm structure. By changing the length of the deflection shaft and the length of the sliding pin, the manual relief pulling force can be effectively reduced, which is more labor-saving. 3. The manual relief device of the present invention is provided with a rectangular stroke groove on the first surface of the main body shell, which is adapted to the shape of the rectangular guide block, and a reset spring is provided on one side of the guide block, and multiple cables are provided on the other side, which ensures that under a certain pulling force, the guide block slides the full stroke cavity distance and returns to the initial position in the no-tension state, thereby ensuring the accuracy of the deflection angle.

[0079] 4. The manual relief device of the utility model can effectively disperse the pulling force and ensure that the guide block is evenly stressed by setting multiple cables, further improving reliability. By setting a step surface in the cable through hole to limit the movement of the cable sleeve, various problems caused by cable bending during use can be effectively avoided.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A manual relief device, comprising a body shell (1), a guide block (2) and a pulling portion, characterized in that: The main body shell (1) includes a travel groove (4), the travel groove (4) is opened on the first surface of the main body shell (1), the guide block (2) is located in the travel groove (4), the guide block (2) is connected to the pulling part, and the pulling part can drive the guide block (2) to move along the travel groove (4); It also includes a deflection part, one end of which is hinged to the guide block (2), and the other end of which is located outside the guide block (2). When the guide block (2) moves along the travel groove (4), the position of the deflection part is relatively deflected to perform a manual relief operation.

2. The manual release device according to claim 1, characterized in that: The deflection portion includes a sliding pin (5), the sliding pin (5) includes a pin tube (6) and a pin seat (7), the pin seat (7) is fixedly connected to the first end of the pin tube (6), the pin seat (7) is located on the circumferential outside of the pin tube (6), and the pin seat (7) includes a first pin hole (8), and the direction of the first pin hole (8) is perpendicular to the direction of the pin tube (6).

3. The manual release device according to claim 2, characterized in that: The guide block (2) includes a hollow portion, the hollow portion is used to accommodate the first end of the pin tube (6) and the pin seat (7), and a second pin hole (9) is opened on the inner wall of the hollow portion. The direction of the second pin hole (9) is perpendicular to the moving direction of the guide block (2), and the second pin hole (9) is coaxial with the first pin hole (8).

4. The manual release device according to claim 3, characterized in that: The manual relief device further comprises an elastic pin, which passes through the first pin hole (8) and the second pin hole (9), and the elastic pin enables the sliding pin (5) to be hinged in the guide block (2).

5. The manual release device according to claim 4, characterized in that: The manual relief device also includes a deflection shaft (10), and the deflection shaft (10) includes a rotating shaft rod (11) and a deflection disk (12). The deflection disk (12) is fixedly connected to the first end of the rotating shaft rod (11), and the deflection disk (12) is perpendicular to the rotating shaft rod (11). The second end of the rotating shaft rod (11) is inserted into the second end of the pin tube (6), and the outer peripheral surface of the rotating shaft rod (11) is clearance-matched with the inner wall of the pin tube (6).

6. The manual release device according to claim 5, characterized in that: The diameter of the rotating shaft (11) ranges from 7 to 8.5 mm, the outer diameter of the pin tube (6) ranges from 11 to 12.5 mm, and the inner diameter of the pin tube (6) ranges from 7 to 8.5 mm.

7. The manual release device according to claim 6, characterized in that: The length of the deflection shaft (10) ranges from 60 to 65 mm, and the length of the sliding pin (5) ranges from 56 to 61 mm.

8. The manual release device according to any one of claims 2 to 7, characterized in that: The travel groove (4) limits the initial position and the terminal position of the guide block (2); when the guide block (2) is located at the initial position, the direction of the pin tube (6) is perpendicular to the first surface of the main body shell (1); when the guide block (2) moves from the initial position to the terminal position, the pin tube (6) generates an angular deflection.

9. The manual release device according to claim 8, characterized in that: The range of the deflection angle α generated by the pin tube (6) is: 0°<α≤24°.

10. The manual release device according to claim 9, characterized in that: The range of the maximum deflection angle β generated by the pin tube (6) is: 15°≤β≤22°.

11. The manual release device according to claim 8, characterized in that: The manual relief device further comprises a reset spring (13), the two ends of which are respectively connected to the guide block (2) and the main body shell (1). When the pulling portion does not apply a pulling force to the guide block (2), the reset spring (13) keeps the guide block (2) in the initial position.

12. The manual release device according to claim 1, characterized in that: The pulling portion includes two or more parallel cables (3), the guide block (2) includes two or more guide block cable grooves (14), one end of the cable (3) is located in the guide block cable groove (14), and the direction of the cable (3) is along the moving direction of the guide block (2).

13. The manual release device according to claim 12, characterized in that: The main body shell (1) further comprises a plurality of cable through holes (15), wherein the cable through holes (15) extend from the inner wall of the travel groove (4) to the side wall of the main body shell (1), and the plurality of cable through holes (15) are respectively used to accommodate a plurality of the cables (3), and the cable through holes (15) have a stepped surface (18) therein.

14. The manual release device according to claim 13, characterized in that: The pull rope (3) includes a pull rope sleeve (19) and a pull rope (20), the pull rope sleeve (19) is sleeved on at least a portion of the outer periphery of the pull rope (20), the pull rope (20) can move relative to the pull rope sleeve (19), the end of the pull rope (20) includes a ball head (21), the ball head (21) is limited by the guide block pull rope groove (14), and the step surface (18) cooperates with the pull rope sleeve (19).

15. A rail vehicle parking cylinder, characterized in that: It comprises a manual release device according to any one of claims 1 to 14 above, wherein the parking cylinder further comprises a thrust rod assembly (22), wherein the thrust rod assembly (22) passes through the axis of the parking cylinder, and one axial end of the thrust rod assembly (22) has an opening, and the deflection portion of the manual release device passes through the opening and cooperates with the interior of the thrust rod assembly (22).

16. The parking cylinder according to claim 15, characterized in that: The parking cylinder further comprises a raising sleeve (16) and a parking cylinder cover (23), wherein the raising sleeve (16) is installed between the manual relief device and the parking cylinder cover (23), the raising sleeve (16) comprises a sleeve through hole (17), and the deflection portion extends into the thrust rod assembly (22) through the sleeve through hole (17).

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