A manual release device for the automatic parking brake of locomotives and rolling stock

Abstract

The present invention discloses a manual release device for an automatic parking brake of a locomotive and rolling stock, which relates to the technical field of railway vehicle braking. It includes a gear mounting bracket, inside which a gear assembly is installed, and outside which a pawl assembly is installed. The gear mounting bracket is connected to a locking tongue assembly, and part of the parts of the locking tongue assembly are embedded in the gear mounting bracket. A ratchet wheel is connected to the gear assembly, and the ratchet wheel cooperates with the tooth-pushing end of the pawl assembly. It has the functions of manual release operation, automatic reset after inflation after release, parking release locking, and remote manual release. The structure of the present invention is compact, easy to install, not easily restricted by the vehicle space, has complete functions, is convenient and flexible to operate, has a simple operation process, and has a high safety factor in use.

Description

Technical Field

[0001] The present invention relates to the technical field of railway vehicle braking, and particularly to a manual release device for an automatic parking brake of a locomotive and rolling stock. Background Art

[0002] Currently, the manual release devices for automatic parking brakes of locomotives and rolling stocks are all directly led out by a rotating shaft, externally connected with a handle, and the handle is manually rotated to release the parking brake. The existing directly led-out type manual release device has no labor-saving mechanism, and the operation is very laborious. There are situations where it cannot be pulled or external tools / forces need to be used to operate it in place; secondly, the existing manual release device has no automatic reset function. After manual release, when using it next time, it is necessary to go under the vehicle again to restore the handle, and the operation process is complex, and the safety hazard of frequent operation under the vehicle is high; in addition, the existing manual release operation is on the automatic parking brake body, and it is necessary to go above the middle track of the vehicle. Some vehicles and lines do not have this operation space or the operation space is limited, making it very inconvenient to use and having a high safety hazard. Summary of the Invention

[0003] The purpose of the present invention is to provide a manual release device for an automatic parking brake of a locomotive and rolling stock to solve the problems listed in the background art.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A manual release device for an automatic parking brake of a locomotive and rolling stock of the present invention includes a gear mounting bracket. A gear assembly is installed inside the gear mounting bracket, and a pawl assembly is installed outside the gear mounting bracket. The gear mounting bracket is connected to a locking tongue assembly, and some parts of the locking tongue assembly are embedded in the gear mounting bracket. A ratchet wheel is connected to the gear assembly, and the ratchet wheel cooperates with the tooth-pushing end of the pawl assembly.

[0006] Preferably, the gear assembly includes a front positive gear, a first gear, a second gear, and a third gear on the back. The first gear, the second gear, and the third gear are rotatably installed on the back of the gear mounting bracket. The second gear and the third gear are arranged in a staggered manner and are both meshed with the first gear; a cam is connected to the front of the third gear. The ratchet wheel is located on the back of the positive gear. The ratchet wheel and the second gear are connected to a shaft by a key. The pawl assembly is located on the front of the gear mounting bracket; a torsion spring is arranged inside the positive gear. One connecting end of the torsion spring is fixed in the positive gear positioning hole, and the other connecting end of the torsion spring is inserted into the gear mounting bracket positioning hole.

[0007] Preferably, the pawl assembly includes a pawl, which is connected to the front of the gear mounting bracket by a positioning bolt. When the pawl operates, it rotates around the positioning bolt. The tooth-pushing end of the pawl cooperates with the outer peripheral surface of the ratchet wheel. The back of the pawl is connected with an adapter column, which penetrates through an adapter slot opened on the front of the gear mounting bracket. The top of the pawl is connected with a return spring, and the other end of the return spring is embedded into a spring positioning hole of the gear mounting bracket.

[0008] Preferably, the locking tongue assembly includes a driving member and an anti-rolling member. The driving member and the anti-rolling member are connected together by bolts. The driving member is embedded inside the gear mounting bracket, and the anti-rolling member cooperates with an anti-rolling pull rod. The cam is located in an avoidance hole between the driving member and the anti-rolling member and cooperates with the driving member. During the rotation of the cam, the driving member is driven to lift or lower, and simultaneously the anti-rolling member is driven to move away from or close to the anti-rolling pull rod.

[0009] Preferably, a circular groove is provided at the outer end of the positive wheel, and a manual-release pull rope is wound in the circular groove. One end of the manual-release pull rope is fixedly connected to the positive wheel, and the other end of the manual-release pull rope is led outwards to the automatic parking device.

[0010] Preferably, a groove is opened at the upper left corner of the outer surface of the positive wheel, and a switching function knob is installed on the outside of the positive wheel. The switching function knob includes an external rotating handle and an internal solid limiting column, and the outer ends of the rotating handle and the solid limiting column are connected together. The inner side of the solid limiting column penetrates and extends to the groove, and the positive wheel is stopped from rotating by the solid limiting column.

[0011] Preferably, an internal hexagonal groove is provided on the exposed end face of the connecting shaft of the positive wheel, and the connecting shaft penetrates and is connected in a through hole opened on the driving member of the locking tongue assembly. An internal hexagonal wrench is inserted into the internal hexagonal groove and rotated in the release direction. The positive wheel increases the torque through the meshing between the first gear, the second gear and the third gear, and drives the cam connected to the third gear to rotate. The cam pushes the locking tongue assembly to move upwards, completing the separation operation between the lower teeth of the locking tongue assembly and the anti-rolling teeth on the anti-rolling pull rod, releasing the lock, and manually releasing the parking.

[0012] Preferably, the ratchet wheel and the pawl cooperate to form a one-way locking mechanism.

[0013] Preferably, before the vehicle normally drives onto the line, the locking tongue assembly continues to move upwards under the pushing action of air pressure. The uppermost end of the locking tongue assembly contacts the adapter column and moves upwards synchronously, driving the pawl to rotate upwards to a position where it does not mesh with the ratchet wheel, releasing the one-way lock, and the positive wheel returns to the initial position under the action of the torsion spring.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0015] A manual release device for an automatic parking brake of a locomotive and rolling stock according to the present invention includes a gear mounting bracket, a gear assembly, a pawl assembly, a locking tongue assembly, and a ratchet. The gear mounting bracket and the locking tongue assembly are connected together to form a support structure, and the gear assembly, the pawl assembly, and the ratchet are mounted on this support structure. Among them, the ratchet cooperates with the tooth-pushing end of the pawl assembly to achieve locking and positioning.

[0016] 1) The design of the gear assembly, by setting a suitable gear reduction transmission ratio, makes the operation more convenient and labor-saving, and solves the problem that on-site operators cannot operate or it is difficult to operate in place.

[0017] 2) The ratchet and the pawl form a one-way locking mechanism, which realizes that the release state is maintained until the train pipe is not recharged with air after manual release, facilitating the inspection, repair and movement of faulty vehicles. After the vehicle returns to normal, as long as the train pipe is charged to the rated pressure, the one-way locking mechanism will separate and automatically reset to the automatic parking state controlled by the train pipe air pressure, saving the on-site personnel from the operation process of going under the vehicle again, and improving the practicability and use safety of the product.

[0018] 3) The design of the switching function button. This device has the function of freely switching between the automatic parking position and the manual release locking position. When in the automatic parking position, it has the functions of automatic release when charging air (as long as it is not in the locking position, it can automatically reset even if it is manually released and then charged with air), and automatic parking when exhausting air. When the vehicle is abnormal and needs to leave the line urgently, after manual release, just turn the switching function button to the manual release locking position, and the parking function of this vehicle can be kept cut off all the time, without affecting the normal running and service braking of the vehicle.

[0019] 4) The manual release pull rope is arranged externally, leading the manual release function from the center position of the cam to a suitable operation position of the vehicle, making it more convenient and safer to use.

[0020] Generally speaking, the present invention has a compact structure, is easy to install, is not easily restricted by the vehicle space, has complete functions, is suitable for a variety of different working conditions, is convenient and flexible to operate, has a simple operation process, and has a high safety factor in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the drawings.

[0022] Figure 1 It is a schematic diagram of the manual release device for the automatic parking brake of a locomotive and rolling stock according to the present invention;

[0023] Figure 2 It is a schematic diagram of the peripheral structure of the locking tongue assembly according to the present invention;

[0024] Figure 3Schematic structural diagram of the gear assembly of the present invention;

[0025] Figure 4 Schematic structural diagram of the gear mounting bracket of the present invention;

[0026] Figure 5 Schematic diagram of the connection relationship between the positive gear and the hand release rope of the present invention;

[0027] Figure 6 Schematic diagram of the connection relationship between the positive gear and the torsion spring of the present invention;

[0028] Figure 7 Schematic diagram of the connection relationship between the positive gear and the switching function knob of the present invention.

[0029] Explanation of reference numerals:

[0030] 1. Lock tongue assembly; 2. Gear mounting bracket; 21. Adaptation groove; 3. Hand release rope; 4. Switching function knob; 5. Gear assembly; 50. Positive gear; 51. Groove; 52. Ratchet wheel; 53. Torsion spring; 54. Cam; 55. First gear; 56. Second gear; 57. Third gear; 58. Pawl; 580. Adaptation post; 59. Return spring; 6. Anti-rolling rod. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined. The meaning of "several" is one or more, unless otherwise specifically defined. The term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] It should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] As Figure 1-7 shown, a manual release device for an automatic parking brake of a locomotive vehicle includes a gear mounting bracket 2, a gear assembly 5 is installed inside the gear mounting bracket 2, a pawl assembly is installed outside the gear mounting bracket 2, the gear mounting bracket 2 is connected to a locking tongue assembly 1, and part of the parts of the locking tongue assembly 1 are embedded in the gear mounting bracket 2. A ratchet wheel 52 is connected to the gear assembly 5, and the ratchet wheel 52 cooperates with the tooth-picking end of the pawl assembly.

[0035] As Figure 3 shown, the gear assembly 5 includes a front positive gear 50, a first gear 55, a second gear 56 and a third gear 57 on the back. The first gear 55, the second gear 56 and the third gear 57 are rotatably installed on the back of the gear mounting bracket 2. The second gear 56 and the third gear 57 are arranged in a staggered manner and are both meshed with the first gear 55. A cam 54 is connected to the front of the third gear 57. The ratchet wheel 52 is located on the back of the positive gear 50. The ratchet wheel 52 and the second gear 56 are connected to a shaft by a key. The pawl assembly is located on the front of the gear mounting bracket 2. A torsion spring 53 is arranged inside the positive gear 50. One connecting end of the torsion spring 53 is fixed in the positioning hole of the positive gear 50, and the other connecting end of the torsion spring 53 is inserted into the positioning hole of the gear mounting bracket 2. The design of the torsion spring 53 is mainly to realize the reset of the positive gear 50.

[0036] As Figure 2 shown, the pawl assembly includes a pawl 58. The pawl 58 is connected to the front of the gear mounting bracket 2 by a positioning bolt, and the pawl 58 rotates around the positioning bolt during operation. The tooth-picking end of the pawl 58 cooperates with the outer peripheral surface of the ratchet wheel 52. An adapter column 580 is connected to the back of the pawl 58. The adapter column 580 passes through an adapter slot 21 opened on the front of the gear mounting bracket 2. A return spring 59 is connected to the top of the pawl 58, and the other end of the return spring 59 is embedded in the spring positioning hole of the gear mounting bracket 2. Specifically, the ratchet wheel 52 and the pawl 58 cooperate to form a one-way locking mechanism, which rotates in the manual release direction during the manual release process and cannot rotate in the reverse direction.

[0037] The tongue locking component 1 includes a driving member and an anti-slip member. The driving member and the anti-slip member are connected together by bolts. The driving member is embedded inside the gear mounting bracket 2, and the anti-slip member cooperates with the anti-slip pull rod 6. The cam 54 is located in the avoidance hole between the driving member and the anti-slip member and cooperates with the driving member. During the rotation of the cam 54, the driving member is driven to lift or lower, and simultaneously the anti-slip member is driven to move away from or close to the anti-slip pull rod 6.

[0038] As Figure 5-6 shown, a circular groove is provided at the outer end of the positive wheel 50, and a manual release rope 3 is wound in the circular groove. One end of the manual release rope 3 is fixedly connected to the positive wheel 50, and the other end of the manual release rope 3 is led outwards to the automatic parking brake. The manual release rope 3 can be flexibly arranged at a place convenient for operation of the vehicle, avoiding the unsafe problems brought by on-site personnel needing to enter under the vehicle for operation and the problem that the operation space under the vehicle is limited and cannot be operated, and realizing remote manual release.

[0039] As Figure 7 shown, a groove 51 is provided at the upper left corner of the outer surface of the positive wheel 50, and a switching function knob 4 is installed outside the positive wheel 50. The switching function knob 4 includes an external rotating handle and an internal solid limiting column, and the outer ends of the rotating handle and the solid limiting column are connected together. The inner side of the solid limiting column penetrates into the groove 51, and the positive wheel 50 is stopped from rotating by the solid limiting column. Specifically, the positive wheel 50, the ratchet wheel 52, and the second gear 56 are commonly connected to a segmented shaft by means of keys or notches, etc., and the three rotate synchronously.

[0040] Specifically, an internal hexagonal groove is provided on the exposed end face of the connecting shaft of the positive wheel 50. The connecting shaft penetrates and is connected in a through hole provided on the driving member of the tongue locking component 1. An internal hexagonal wrench is inserted into the internal hexagonal groove and rotated in the release direction. The positive wheel 50 increases the torque through the meshing between the first gear 55, the second gear 56, and the third gear 57, and drives the cam 54 connected to the third gear 57 to rotate. The cam 54 pushes the tongue locking component 1 to move upwards, completing the separation operation between the lower teeth of the tongue locking component 1 and the anti-slip teeth on the anti-slip pull rod, releasing the lock, and manually releasing the parking.

[0041] Before the vehicle normally travels on the line, the tongue locking component 1 continues to move upwards under the pushing action of air pressure. The uppermost end of the tongue locking component 1 contacts the adapter column 580 and moves upwards synchronously, driving the pawl 58 to rotate upwards to a position where it does not mesh with the ratchet wheel 52, releasing the one-way lock, and the positive wheel 50 returns to the initial position under the action of the torsion spring 53.

[0042] The usage process of the present invention is as follows:

[0043] When manual release is required, insert the hexagonal wrench into the hexagonal groove on the connecting shaft of the positive wheel 50 and rotate it in the release direction. At this time, the positive wheel 50 increases the torque through the meshing between the No. 1 gear 55, the No. 2 gear 56 and the No. 3 gear 57, which saves effort in operation, drives the cam 54 connected to the No. 3 gear 57 to rotate, and pushes the lock tongue assembly 1 to move upward, and finally separates the lower end teeth of the lock tongue assembly 1 from the anti-slip teeth on the anti-slip pull rod 6, thereby releasing the lock and manually releasing the parking brake.

[0044] During this process, the one-way locking mechanism composed of the ratchet 52 and the pawl 58 can rotate in the direction of manual release but cannot rotate in the reverse direction. This ensures that the vehicle can be easily moved after manual release before the train pipe is inflated again. It is suitable for situations where the parking brake needs to be temporarily released due to vehicle failure, vehicle reorganization, etc. When the fault is repaired and other actions such as coupling are completed, before the vehicle goes on the line normally, it is only necessary to fill the train pipe with air to a fixed pressure. Under the push of the air pressure, the lock tongue assembly 1 continues to move upward for a distance (this distance is determined by the upper and lower limits of the diaphragm action on the main body of the automatic parking device). During the upward movement, the top of the driving part of the lock tongue assembly touches the adapter column 580 and moves upward synchronously. Then the adapter column 580 drives the pawl 58 to rotate upward to a position where it is not engaged with the ratchet 52, and the one-way lock is released; at this time, the positive wheel 50 returns to the initial position under the action of the torsion spring 53, and the automatic parking device is automatically reset and restored to the state of automatic parking and relief controlled by the train pipe air pressure; when the switching function knob 4 is in the automatic parking state position, the torsion spring 53 is in a free and uncompressed state, such as Figure 3 shown.

[0045] In addition, when the automatic parking device fails and needs to be disconnected, just follow the above manual relief steps, such as Figure 1 As shown, the switching function knob 4 is turned toward the parking relief lock direction, so that the solid part at the rear end of the switching function knob 4 is stuck in the groove 51, that is, the positive wheel 50 is stuck by the solid limit column at the rear end of the switching function knob 4 and cannot rotate. At this time, the automatic parking gear assembly 5 cannot be automatically reset after being inflated again through the train pipe, thereby realizing the removal of the parking function.

[0046] The present invention has the functions of labor-saving manual relief operation, automatic resetting after relief, parking relief locking, remote manual relief, etc. The present invention has the following advantages: compact structure, easy installation, not easily restricted by vehicle space, complete functions, suitable for various working conditions, convenient and flexible operation, simple operation process, and high safety factor.

[0047] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A manual release device for an automatic parking brake of a locomotive vehicle, characterized in that: it includes a gear mounting bracket (2), a gear assembly (5) is installed inside the gear mounting bracket (2), a pawl assembly is installed outside the gear mounting bracket (2), the gear mounting bracket (2) is connected to a locking tongue assembly (1), and part of the parts of the locking tongue assembly (1) are embedded in the gear mounting bracket (2). A ratchet wheel (52) is connected to the gear assembly (5), and the ratchet wheel (52) cooperates with the tooth-pushing end of the pawl assembly; The gear assembly (5) includes a front positive gear (50), a first gear (55), a second gear (56) and a third gear (57) on the back. The first gear (55), the second gear (56) and the third gear (57) are rotatably installed on the back of the gear mounting bracket (2). The second gear (56) and the third gear (57) are arranged in a staggered manner and are all meshed with the first gear (55); a cam (54) is connected to the front of the third gear (57). The ratchet wheel (52) is located on the back of the positive gear (50). The ratchet wheel (52) and the second gear (56) are connected to a shaft by a key. The pawl assembly is located on the front of the gear mounting bracket (2); a torsion spring (53) is arranged inside the positive gear (50). One connecting end of the torsion spring (53) is fixed in the positioning hole of the positive gear (50), and the other connecting end of the torsion spring (53) is inserted into the positioning hole of the gear mounting bracket (2); The pawl assembly includes a pawl (58). The pawl (58) is connected to the front of the gear mounting bracket (2) by a positioning bolt, and the pawl (58) rotates around the positioning bolt during operation. The tooth-pushing end of the pawl (58) cooperates with the outer peripheral surface of the ratchet wheel (52). An adapter column (580) is connected to the back of the pawl (58). The adapter column (580) passes through an adapter slot (21) opened on the front of the gear mounting bracket (2). A return spring (59) is connected to the top of the pawl (58), and the other end of the return spring (59) is embedded in the spring positioning hole of the gear mounting bracket (2); The locking tongue assembly (1) includes a driving member and an anti-rolling member. The driving member and the anti-rolling member are connected together by bolts. The driving member is embedded inside the gear mounting bracket (2), and the anti-rolling member cooperates with an anti-rolling pull rod (6); the cam (54) is located in an avoidance hole between the driving member and the anti-rolling member and cooperates with the driving member. During the rotation of the cam (54), the driving member is driven to lift or lower, and the anti-rolling member is synchronously driven to move away from or close to the anti-rolling pull rod (6).

2. The manual release device for an automatic parking brake of a locomotive vehicle according to claim 1, characterized in that: a circular groove is arranged at the outer end of the positive gear (50), and a manual release pull rope (3) is wound in the circular groove. One end of the manual release pull rope (3) is fixedly connected to the positive gear (50), and the other end of the manual release pull rope (3) is led outwards to the automatic parking brake.

3. The manual release device for the automatic parking brake of a rolling stock according to claim 1, characterized in that: a groove (51) is provided at the upper left corner of the outer surface of the positive wheel (50), a switching function knob (4) is installed outside the positive wheel (50), the switching function knob (4) includes an external rotating handle and an internal solid limiting column, and the outer ends of the rotating handle and the solid limiting column are connected together; the inner side of the solid limiting column penetrates into the groove (51), and the positive wheel (50) is stopped from rotating by the solid limiting column.

4. The manual release device for the automatic parking brake of a rolling stock according to claim 1, characterized in that: an inner hexagonal groove is provided on the exposed end face of the connecting shaft of the positive wheel (50), and the connecting shaft penetrates through a through hole provided on the driving member of the locking tongue assembly (1); an inner hexagonal wrench is inserted into the inner hexagonal groove and rotated in the release direction, the positive wheel (50) increases the torque through the meshing between the first gear (55), the second gear (56) and the third gear (57), and drives the cam (54) connected to the third gear (57) to rotate, and the cam (54) pushes the locking tongue assembly (1) to move upward, completing the separation operation between the lower teeth of the locking tongue assembly (1) and the anti-rolling teeth on the anti-rolling pull rod (6), the locking is released, and the parking is manually released.

5. The manual release device for the automatic parking brake of a rolling stock according to claim 1, characterized in that: the ratchet wheel (52) and the ratchet pawl (58) cooperate to form a one-way locking mechanism.

6. The manual release device for the automatic parking brake of a rolling stock according to claim 1, characterized in that: before the vehicle normally runs on the line, the locking tongue assembly (1) continues to move upward for a certain distance under the pushing action of air pressure, the uppermost end of the locking tongue assembly (1) contacts the matching column (580) and moves upward synchronously, driving the ratchet pawl (58) to rotate upward to a position where it does not mesh with the ratchet wheel (52), the one-way locking is released, and the positive wheel (50) returns to the initial position under the action of the torsion spring (53).

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