Auxiliary device for relieving parking brake of subway train

Abstract

The utility model relates to the technical field of subway train maintenance, in particular to a subway train parking brake relieving auxiliary device which comprises a lever body, a hollow stainless steel pipe is arranged in the lever body, and a round pipe perpendicular to the lever body is installed at the top end of the lever body. The center of the side wall of the circular tube is integrally and fixedly connected with the top end of the lever main body, and a handheld sheath is fixedly mounted at the bottom end of the lever main body. The utility model is mainly characterized in that the circular tube at the top end of the lever main body is propped against the joint part of a train bogie and a pulling handle base, so that the joint part of the pulling handle base is in contact with the surface of the circular tube; according to the lever, the surface paint of the train bogie can be prevented from being damaged, and under the action of the lever principle, an operator places the two parts at the other end of the lever main body and holds the handheld sheath during force application, so that the parking brake release handle can be pulled in a more labor-saving manner, the workload is reduced, and the personal safety of the operator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of subway train maintenance, in particular to a subway train parking brake relief auxiliary device. Background Art

[0002] The friction brakes of subway trains are applied in the form of air brakes and parking brakes (similar to the foot brakes and hand brakes of cars). When the subway train brakes to zero speed, if the parking brake needs to be applied, it can be operated through the button on the driver's console. After pressing the parking brake button, the parking brake cylinder discharges compressed air. When the pressure gradually decreases and the pressure is too low to prevent the parking brake spring from popping out, the parking brake spring pushes out the brake shoe, and the brake shoe locks the train wheel tread, thereby achieving proper parking. If the train air compressor stops at this time and there is no residual compressed air in the train cylinders, it is impossible to inflate the parking brake cylinder to achieve the relief of the parking brake. In order to prevent the situation where the parking brake cannot be relieved and the train cannot move, a pull handle is designed on the bogie of the subway electric passenger car. When this handle is pulled out, the transmission of elastic force between the parking brake spring and the brake shoe can be disconnected, so that the brake shoe no longer presses the tread tightly, achieving mechanical relief of the parking brake. The above handle was originally designed to be pulled by manpower, but in actual operation, it is very difficult to pull out the handle due to the excessive force required to pull out the handle, the vehicle structure blocking the pulling direction, the small operating space and the safety risks of manual operation.

[0003] Before the device was designed, the operator had to pull out the parking brake release handle by hand. The disadvantages of manual operation are as follows: too much force is required to pull out the handle, and it is generally difficult for the operator's index finger and middle finger to directly pull the handle out; the pulling direction is blocked by the vehicle structure, and the secondary vertical shock absorber of the vehicle may block the pulling direction, so the operator can only use the wrist to exert force and cannot pull the handle; the operating space is small, and the space between the handle and the vehicle bogie is very narrow, which makes it difficult to exert force. The operator must turn sideways less than 120 degrees to less than 140 degrees, and the feet must have a support point to pull hard.

[0004] Therefore, it is necessary to design a device to cooperate with the handle so that the operator can quickly and conveniently pull out the parking brake release handle with the help of the device. Therefore, we need a subway train parking brake release auxiliary device to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a parking brake relief auxiliary device for a subway train, which mainly presses a round tube at the top end of a lever body against the joint part of the base of a pulling handle of a train bogie. Since the round tube is integrally fixedly connected to the top end of the lever body, it is in contact with the entire surface of the lever body, which can prevent damage to the surface paint of the train bogie. Under the action of the lever principle, the operator places both ends on the other end of the lever body and holds the position of the hand-held sheath when exerting force, which can save effort to pull the parking brake relief handle, reduce the workload and ensure the personal safety of the operator.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a subway train parking brake relief auxiliary device, including a lever body, the interior of the lever body is set as a hollow stainless steel tube, the length of the lever body is set to 60cm, the diameter of the hollow stainless steel tube inside the lever body is set to 18mm, the wall thickness inside the lever body is set to 1mm, a round tube perpendicular to the lever body is installed at the top of the lever body, the interior of the round tube is also set as a hollow stainless steel tube, the outer diameter of the round tube is equal to the outer diameter of the lever body, the side wall center of the round tube is integrally fixedly connected to the top of the lever body, and a hand-held sheath is fixedly installed at the bottom of the lever body.

[0007] Preferably, a through hole is provided 13 cm away from the top end of the lever body, the direction of the through hole is parallel to the central axis of the circular tube, and a hook mechanism is provided inside the through hole.

[0008] Preferably, the hook mechanism includes two hook rods and hooks, the two hook rods are arranged in an L shape, and one end of the two hook rods passes through the through hole and is fixedly connected, and the other end of the hook rod is fixedly connected to one end of the hook.

[0009] Preferably, the hook claw and the hook claw rod are both configured as solid stainless steel rods, and the angle between the hook claw and the hook claw rod is configured to be less than 80 degrees.

[0010] Preferably, the surface of the handheld sheath is provided with a non-slip soft sheath.

[0011] Preferably, a through hole is opened on one side of the bottom end of the hand-held sheath, the through hole passes through the hand-held sheath and is connected with the side wall of the lever body, and a safety rope is installed inside the through hole.

[0012] Preferably, the surface of the circular tube and the surface of the hook mechanism are both sprayed with red paint.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model mainly presses the round tube at the top end of the lever body against the joint part of the base of the pulling handle of the train bogie. Since the round tube is integrally fixedly connected to the top end of the lever body, it is in contact with the entire surface of the lever body, which can prevent the surface paint of the train bogie from being damaged. Moreover, under the effect of the lever principle, the operator places both ends on the other end of the lever body and holds the position of the hand-held sheath when exerting force, which can save effort to pull the parking brake release handle, reduce the workload and ensure the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the enlarged structure of A.

[0017] In the figure: 1. lever body; 2. round tube; 3. through hole; 4. hook rod; 5. hook; 6. hand-held sheath; 7. through hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2 The utility model provides a technical solution: a parking brake relief auxiliary device for a subway train, comprising a lever body 1, the interior of the lever body 1 is set as a hollow stainless steel tube, the length of the lever body 1 is set to 60 cm, the diameter of the hollow stainless steel tube inside the lever body 1 is set to 18 mm, the wall thickness inside the lever body 1 is set to 1 mm, a round tube 2 perpendicular to the lever body 1 is installed at the top of the lever body 1, the inside of the round tube 2 is also set as a hollow stainless steel tube, the outer diameter of the round tube 2 is equal to the outer diameter of the lever body 1, the side wall center of the round tube 2 is integrally fixedly connected to the top of the lever body 1, and a hand-held sheath 6 is fixedly installed at the bottom of the lever body 1;

[0020] When in use, the round tube 2 at the top of the lever body 1 is pressed against the joint of the pulling handle base of the train bogie. Since the round tube 2 is integrally fixedly connected to the top of the lever body 1 and contacts the joint of the pulling handle base, damage to the surface paint of the train bogie can be prevented. Under the action of the lever principle, the operator places both parties on the other end of the lever body 1 and holds the position of the hand-held sheath 6 when exerting force, which can save effort in pulling the parking brake release handle, reducing the workload and ensuring the personal safety of the operator.

[0021] A through hole 3 is provided 13 cm away from the top of the lever body 1, and the direction of the through hole 3 is parallel to the central axis of the circular tube 2. A hook 5 mechanism is provided inside the through hole 3. At this time, the force arm of the hook 5 mechanism on the lever is about 13 cm, and the length of the lever body 1 is 60 cm, thereby realizing a labor-saving lever that is magnified by about 60÷13≈4 times, thereby reducing the force required for operation to one-fourth of the original force.

[0022] The hook mechanism includes two hook rods 4 and a hook 5. The two hook rods 4 are arranged in an L shape, and one end of the two hook rods 4 passes through the through hole 3 and is fixedly connected, and the other end of the hook rod 4 is fixedly connected to one end of the hook 5. Since the other end of the hook rod 4 is fixedly connected to one end of the hook 5, the hook mechanism can adapt to parking brake release handles of different shapes and sizes, and the hook rod 4 fixedly connected through the through hole 3 has a stable structure and can withstand large tension and pressure, ensuring that the auxiliary device can still maintain stability and reliability when used for a long time or facing a complex working environment.

[0023] The hook 5 and the hook rod 4 are both solid stainless steel rods, and the angle between the hook 5 and the hook rod 4 is set to be less than 80 degrees. By setting the angle to an acute angle, the train parking brake release handle is not easy to slip off the hook 5 during the pulling process of the hook mechanism.

[0024] The surface of the handheld sheath 6 is provided with an anti-slip soft cover, which can significantly increase the friction between the operator and the handheld sheath 6, thereby effectively preventing the hand from slipping or falling off during operation, and has certain anti-slip properties and comfort.

[0025] A through hole 7 is provided on one side of the bottom end of the hand-held sheath 6, which passes through the hand-held sheath 6 and is connected to the side wall of the lever body 1. A safety rope is installed inside the through hole 7. The safety rope passes through the hand-held sheath 6 and the through hole 7 on the lever body 1 and is tied to the wrist of the operator to prevent the device from falling or being lost.

[0026] The surface of the circular tube 2 and the surface of the hook mechanism are sprayed with red paint. Red is usually used as a warning color because it can quickly attract people's attention. In the subway train parking brake relief assist device, the spraying of red paint not only improves the visibility of the device, but also enhances its warning effect, reminding operators to pay attention to operating safety and avoid accidents.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A subway train parking brake relief auxiliary device, comprising a lever body (1), characterized in that: The interior of the lever body (1) is configured as a hollow stainless steel tube, the length of the lever body (1) is configured as 60 cm, the diameter of the hollow stainless steel tube inside the lever body (1) is configured as 18 mm, the wall thickness inside the lever body (1) is configured as 1 mm, a round tube (2) perpendicular to the lever body (1) is installed at the top end of the lever body (1), the interior of the round tube (2) is also configured as a hollow stainless steel tube, the outer diameter of the round tube (2) is equal to the outer diameter of the lever body (1), the center of the side wall of the round tube (2) is integrally fixedly connected to the top end of the lever body (1), and a hand-held sheath (6) is fixedly installed at the bottom end of the lever body (1).

2. The subway train parking brake relief auxiliary device according to claim 1 is characterized in that: A through hole (3) is provided 13 cm from the top of the lever body (1), the direction of the through hole (3) is parallel to the central axis of the circular tube (2), and a hook mechanism is provided inside the through hole (3).

3. The subway train parking brake relief auxiliary device according to claim 2 is characterized in that: The hook mechanism comprises two hook rods (4) and a hook (5), the two hook rods (4) being arranged in an L shape, one end of the two hook rods (4) passing through the through hole (3) and being fixedly connected, and the other end of the hook rod (4) being fixedly connected to one end of the hook (5).

4. The subway train parking brake relief auxiliary device according to claim 3 is characterized in that: The hook claw (5) and the hook claw rod (4) are both configured as solid stainless steel rods, and the angle between the hook claw (5) and the hook claw rod (4) is configured to be less than 80 degrees.

5. The subway train parking brake relief auxiliary device according to claim 4, characterized in that: The surface of the handheld protective cover (6) is provided with an anti-slip soft cover.

6. The subway train parking brake relief auxiliary device according to claim 5, characterized in that: A through hole (7) is provided on one side of the bottom end of the hand-held protective cover (6), the through hole (7) passes through the hand-held protective cover (6) and is in communication with the side wall of the lever body (1), and a safety rope is installed inside the through hole (7).

7. The subway train parking brake relief auxiliary device according to claim 6, characterized in that: The surface of the circular tube (2) and the surface of the hook mechanism are both sprayed with red paint.

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