Novel access door for equipment box body under railway vehicle

Abstract

The utility model discloses a novel access door structure for an under-vehicle equipment box body of a railway vehicle. The novel access door structure comprises a damping hinge, an access door plate and a safety pin, and a handle and a door lock are mounted on the maintenance door plate. And the maintenance door plate is connected to the box body through a damping hinge. The safety pin comprises a pin shaft, a spring, a steel ball, a movable blocking piece and a fixing pin. A square groove is formed in the top end of the pin shaft, and the movable blocking piece is placed in the square groove of the pin shaft. A long hole is formed in the movable blocking piece, and the fixing pin penetrates through the long hole of the movable blocking piece to fix the movable blocking piece to the pin shaft. The movable blocking piece can slide up and down in the groove of the pin shaft, and when the movable blocking piece slides to the uppermost portion, the movable blocking piece can be turned over to the horizontal position. The access door is connected through the damping hinge, the door plate can be suspended at any position after being opened, the door plate does not need to be taken down or supported by hands, and maintenance operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel rail vehicle undercarriage equipment box maintenance door structure, specifically a novel rail vehicle undercarriage equipment box maintenance door connection and secondary anti -drop structure. BACKGROUND

[0002] With the development of subway, light rail railway and other urban rail transit in China, the rail vehicle increasingly needs larger internal space and comfortable internal environment. Therefore, part of the equipment with large volume and large noise and vibration during operation is hoisted under the vehicle in the design of the vehicle. In order to meet the protection requirements, various equipment hoisted under the vehicle is usually integrated into a sealed box, and the box is provided with a maintenance door for facilitating daily maintenance and repair of the equipment.

[0003] The equipment maintenance door needs to be easily opened and provided with a secondary anti-drop structure during use. The secondary anti-drop structure prevents the maintenance door from being automatically opened or even falling off due to door lock failure during train operation, thereby causing an accident.

[0004] The existing under-vehicle equipment maintenance door is usually connected by a hook, and a steel wire is used to connect the maintenance door and the box frame together as a secondary anti-drop structure. Therefore, the secondary anti-drop steel wire needs to be disconnected during maintenance operation, and then the maintenance door needs to be removed for maintenance work. After the maintenance is completed, the maintenance door is installed again, and the secondary anti-drop steel wire is connected. Not only is the operation complex, but also the maintenance time is increased.

[0005] In view of the defects that the existing under-vehicle equipment maintenance door needs to be removed or supported by hand during maintenance operation, and the secondary anti-drop structure of the maintenance door is connected by a steel wire, which is complex to disassemble and install during maintenance, the utility model provides a novel rail vehicle undercarriage equipment box maintenance door structure. UTILITY MODEL CONTENTS

[0006] In view of the defects of the existing under-vehicle equipment maintenance door, the utility model provides a novel rail vehicle undercarriage equipment box maintenance door structure.

[0007] The utility model is implemented as follows:

[0008] The utility model provides a new rail vehicle under -vehicle equipment box maintenance door, including the box, the box is provided with maintenance door, the maintenance door includes: damping hinge, maintenance door board, safety pin, maintenance door board is connected to the box through damping hinge chain, and maintenance door board both sides are provided with safety pin stop plate, the safety pin includes pin shaft, spring, steel ball, fixed pin, movable baffle, the pin shaft top has a square recess, and movable baffle is placed in the square recess of pin shaft, and the movable baffle has a long hole, and fixed pin passes through the long hole of movable baffle and fixes movable baffle to pin shaft, and the movable baffle can slide up and down in the square recess of pin shaft top, when movable baffle slides to the uppermost, can overturn horizontal position, the square recess bottom of pin shaft has a round hole, and spring, steel ball are placed in the hole in proper order, and the spring and steel ball can slide in the hole, and steel ball is pushed to the side of movable baffle under the thrust of spring.

[0009] Further, the movable baffle has a semicircular recess on one side; when the movable baffle is turned to the vertical position and pushed down to the bottom, the steel ball is clamped into the semicircular recess of the movable baffle under the thrust of the spring, preventing the movable baffle from moving, and the safety pin is in the locked position; pushing the movable baffle upward, the steel ball moves to the left under the thrust of the spring and comes out of the semicircular recess, and when the movable baffle slides to the uppermost, it is turned to the horizontal position, and the safety pin is opened.

[0010] Further, the maintenance door board is provided with a handle and a door lock.

[0011] Further, two safety pin stop plates are welded on the maintenance door board, and each safety pin stop plate has a square hole; the square hole can ensure that the pin body of the safety pin and the movable baffle in the open state pass through, and can prevent the movable baffle in the locked state from passing through.

[0012] Further, the safety pin is connected to the box by bolts; when maintenance work is needed, the safety pin is directly opened, the door lock is opened, and then the maintenance door board is opened, and the maintenance work can be carried out; when the maintenance door needs to be closed, the safety pin is first ensured to be opened, then the maintenance door is closed, at this time the safety pin is inserted into the square hole of the safety pin stop plate, and then the safety pin is locked.

[0013] The utility model has the advantages that compared with the prior art, the utility model has the advantages that:

[0014] In the utility model, the maintenance door is connected by a damping hinge, and the door board can be suspended at any position after being opened, without the need to take down the door board or support it by hand, facilitating maintenance operation.

[0015] In the utility model, the secondary anti-falling structure of the maintenance door adopts a safety pin structure. When the door is opened, the safety pin movable baffle is only needed to be actuated to realize the opening and locking of the secondary anti-falling, which is simple and fast to operate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structure diagram of opening of the maintenance door of the novel rail vehicle under equipment box in the utility model;

[0017] Fig. 2 It is a structure diagram of closing of the maintenance door of the novel rail vehicle under equipment box in the utility model;

[0018] Fig. 3 It is a structure diagram of opening of the safety pin of the maintenance door of the novel rail vehicle under equipment box in the utility model;

[0019] Fig. 4 It is a structure diagram of locking of the safety pin of the maintenance door of the novel rail vehicle under equipment box in the utility model;

[0020] Wherein, 1 - box, 2 - damping hinge, 3 - maintenance door plate, 4 - safety pin, 31 - safety pin stop plate, 32 - handle, 33 - door lock, 41 - pin shaft, 42 - spring, 43 - steel ball, 44 - fixed pin, 45 - movable baffle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and effect of the utility model more clear, the utility model is further explained in detail by the following examples.

[0022] As Figs. 1-4 The novel rail vehicle under equipment box maintenance door of the utility model includes box 1, the box 1 is provided with maintenance door, and the maintenance door includes: damping hinge 2, maintenance door plate 3 and safety pin 4.

[0023] The maintenance door plate 3 is connected to the box through the damping hinge 2, and the damping torque of the damping hinge 2 is greater than the torque generated by the gravity of the maintenance door.

[0024] The safety pin 4 includes pin shaft 41, spring 42, steel ball 43, movable baffle 45 and fixed pin 44.

[0025] The pin shaft 41 top has a square groove, and the movable baffle 45 is placed in the square groove of the pin shaft 41. The movable baffle 45 has a long hole, the fixed pin 44 passes through the long hole of the movable baffle 45, and the movable baffle 45 is fixed to the pin shaft 41. The pin shaft 41 square groove bottom has a round hole, and the spring 42 and the steel ball 43 are sequentially placed in the hole, and the spring 42 and the steel ball 43 can slide in the hole.

[0026] The steel ball 43 is pushed against the side of the movable stop 45 under the pushing force of the spring 42, and provides damping force for the movable stop 45, preventing the movable stop 45 from vibrating and aggravating the wear in use.

[0027] The movable stop 45 has a semicircular groove on one side. When the movable stop 45 is turned to the vertical position and pushed down to the bottom, the steel ball 43 is clamped into the semicircular groove of the movable stop 45 under the pushing force of the spring 42, preventing the movable stop from moving. At this time, the safety pin 4 is in the locked position. Pushing the movable stop 45 upward, the steel ball 43 moves to the left under the pushing force and comes out of the semicircular groove. When the movable stop 45 slides to the uppermost position and is turned to the horizontal position, the safety pin 4 is opened.

[0028] Two safety pin stop plates 31 are welded on the access door plate 3, and the safety pin stop plates 31 have a square hole. The square hole can ensure that the pin body 41 of the safety pin 4 and the movable stop 45 in the open state pass through, and can prevent the movable stop 45 in the locked state from passing through.

[0029] The safety pin 4 is connected to the box body 1 by bolts. If maintenance work is needed, the safety pin 4 is directly opened, the door lock 33 is opened, and then the access door plate 3 is opened, and the maintenance work can be carried out. When the access door needs to be closed, it is ensured that the safety pin 4 is opened first, and then the access door is closed. At this time, the safety pin 4 is inserted into the square hole of the safety pin stop plate 31, and then the safety pin 4 is locked. At this time, the movable stop 45 of the safety pin 4 is clamped outside the safety pin stop plate 31. If the door lock 33 fails, the access door can be effectively prevented from being automatically opened, causing an accident.

[0030] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements can be made, and these improvements should be considered as the protection scope of the present application.

Claims

1. A new type of rail vehicle undercarriage equipment box maintenance door, comprising a box (1), characterized in that: An inspection door is provided on the box body (1), and the inspection door comprises: a damping hinge (2), an inspection door panel (3), and a safety pin (4); the inspection door panel (3) is connected to the box body (1) via the damping hinge (2); Safety pin stoppers (31) are provided on both sides of the inspection door panel (3); The safety pin (4) comprises a pin shaft (41), a spring (42), a steel ball (43), a fixing pin (44), and a movable baffle (45); The top of the pin shaft (41) is provided with a square groove, and the movable baffle (45) is placed in the square groove of the pin shaft (41); the movable baffle (45) is provided with a long hole, and the fixing pin (44) passes through the long hole of the movable baffle (45) to fix the movable baffle (45) to the pin shaft (41); the movable baffle (45) can slide up and down in the square groove at the top of the pin shaft (41), and when the movable baffle slides to the top, it can be flipped to a horizontal position; the bottom of the square groove of the pin shaft (41) is provided with a round hole, and a spring (42) and a steel ball (43) are placed in the hole in turn, and the spring and the steel ball can slide in the hole, and the steel ball (43) is pushed onto the side of the movable baffle (45) under the thrust of the spring (42).

2. A new type of rail vehicle undercarriage equipment box inspection door according to claim 1, characterized in that: The movable baffle (45) has a semicircular groove on one side; when the movable baffle (45) is rotated to the vertical position and pushed downward to the bottom, the steel ball (43) is stuck in the semicircular groove of the movable baffle (45) under the thrust of the spring (42), preventing the movable baffle (45) from moving, and the safety pin (4) is in the locked position; when the movable baffle (45) is pushed upward, the steel ball (43) moves to the left under the thrust of the spring (42) and escapes from the semicircular groove. When the movable baffle (45) slides to the top and flips to the horizontal position, the safety pin (4) is opened.

3. The novel rail vehicle undercarriage equipment box inspection door according to claim 1 is characterized in that: The inspection door panel (3) is provided with a handle (32) and a door lock (33).

4. The novel rail vehicle undercarriage equipment box inspection door according to claim 1 is characterized in that: Two safety pin stop plates (31) are welded on the inspection door panel (3), and a square hole is provided on the safety pin stop plate (31); the square hole can ensure that the pin body of the safety pin (4) and the movable stop plate (45) in the open state pass through, and can prevent the movable stop plate (45) in the locked state from passing through.

5. The novel rail vehicle undercarriage equipment box inspection door according to claim 1 is characterized in that: The safety pin (4) is connected to the box body (1) by means of bolts; if maintenance work is required, the safety pin (4) is directly opened, the door lock is opened, and then the maintenance door panel is opened to carry out the maintenance work; When the inspection door needs to be closed, first ensure that the safety pin (4) is opened, and then close the inspection door. At this time, the safety pin (4) is inserted into the square hole of the safety pin stop plate (31), and then the safety pin (4) is locked.

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