CN220130117U - Auxiliary overhaul device for head car of railway vehicle - Google Patents

Abstract

The utility model discloses an auxiliary overhaul device for a head car of a railway vehicle, which comprises a base, an operation platform, a straight ladder, an anti-skid assembly and a plurality of rollers, wherein the operation platform, the straight ladder and the base are sequentially connected from top to bottom; the anti-slip assembly comprises a first limiting part and a second limiting part which are identical in structure and symmetrically arranged, the first limiting part is in threaded connection with the base in the vertical direction, when the first limiting part moves downwards, the lower end is abutted with the upper surface of one steel rail, and when the second limiting part moves downwards, the lower end is abutted with the upper surface of the other steel rail. The scheme has simple structure and convenient operation, and is convenient for overhauling and maintaining the head car of the railway vehicle.

Description

Auxiliary overhaul device for head car of railway vehicle

Technical Field

The utility model belongs to the field of maintenance auxiliary equipment, and particularly relates to an auxiliary maintenance device for a head car of a railway vehicle.

Background

At present, when temporary fault treatment is carried out on the head car of the motor train unit, the ground of the trench of the overhaul warehouse is higher than the fault position of the head car, and is influenced by structures such as arc-shaped protrusions at the head hood position of the motor train unit, on-site overhaul maintainers often need to match with each other by a plurality of persons, and long ladders are matched with safety protection ropes to replace fault parts, so that larger safety risks exist on site. In addition, the replacement of some complicated parts of structure is involved, for example, when the headlight wiper of the motor train unit is replaced, because the replacement operation time is longer, the overhaul warehouse is influenced by daily production tasks, the fault treatment needs to report the scheduling application for shunting to the temporary repair operation warehouse in advance for replacing the parts, the temporary repair warehouse of the motor train unit is not provided with a contact net, professional drivers are arranged to firstly pull the motor train unit to the proper position of the temporary repair warehouse by using the highway and railway dual-purpose vehicle when the complicated parts are replaced, the fault treatment operation can be carried out after the safety anti-slip of the motor train unit is arranged, the complex operation flow, more personnel cooperation, uncontrollable process risk, low fault treatment efficiency and a series of influencing factors which are inconvenient to overhaul and maintain, such as more safety risk exist are involved in the original fault treatment flow, and finally unnecessary waste of manpower, material resources, financial resources and the like are caused.

Therefore, a new technology is needed to solve the problem that the head car of the railway vehicle is inconvenient to overhaul and maintain in the prior art.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an auxiliary overhauling device for a head car of a railway vehicle, which has the effect of being convenient for overhauling and maintaining the head car of the railway vehicle.

The utility model adopts the following technical scheme:

the auxiliary overhaul device for the head car of the railway vehicle comprises a base, an operation platform, a straight ladder, an anti-skid assembly and a plurality of rollers, wherein the operation platform is positioned above the base, two ends of the straight ladder are respectively hinged with the base and the operation platform, one end, close to the head car, of the operation platform is provided with a first concave notch, the first notch is matched with the external structure of the head car, and the rollers are arranged at the bottom of the base and are respectively positioned above two steel rails and walk along the steel rails;

the anti-skid assembly comprises a first limiting part and a second limiting part which are identical in structure and symmetrically arranged, wherein the first limiting part is in threaded connection with the base in the vertical direction, when the first limiting part moves downwards, the lower end of the first limiting part is abutted to the upper surface of one steel rail, and when the second limiting part moves downwards, the lower end of the second limiting part is abutted to the upper surface of the other steel rail.

As a further improvement of the technical scheme of the utility model, the anti-skid assembly further comprises a first handle fixedly connected with the first limiting piece and a second handle fixedly connected with the second limiting piece, wherein the first handle is horizontally arranged and perpendicular to the first limiting piece, and the second handle is horizontally arranged and perpendicular to the second limiting piece.

As a further improvement of the technical scheme of the utility model, the anti-rolling assembly comprises a third limiting piece and a fourth limiting piece which are identical in structure and are oppositely arranged, one end of the third limiting piece is in threaded connection with the base in the horizontal direction, the other end of the third limiting piece is in butt joint with one side surface of the steel rail, and similarly, the end part of the fourth limiting piece is in butt joint with the other side surface of the steel rail.

As a further improvement of the technical scheme of the utility model, the anti-roll component further comprises a first connecting piece and a second connecting piece which are identical in structure and symmetrically arranged, wherein the upper end of the first connecting piece is detachably and fixedly connected with the base, and the lower end of the first connecting piece is provided with a first threaded hole into which the third limiting piece can be inserted.

As a further improvement of the technical scheme of the utility model, the lifting mechanism comprises a plurality of drivers, the output end of each driver is vertically provided with a telescopic rod, when the drivers are started, the telescopic rods extend or retract, and the two ends of each telescopic rod are respectively and fixedly connected with the base and the working platform.

As a further improvement of the technical scheme of the utility model, the straight ladder is an extension ladder.

As a further improvement of the technical scheme of the utility model, a second notch is arranged on one side, far away from the first notch, of the operation platform, upper supporting handles are arranged on two sides, opposite to the second notch, of the second notch, a third notch corresponding to the second notch is arranged on the base, lower supporting handles are arranged on two sides, opposite to the third notch, of the second notch, the upper end of the telescopic ladder is respectively hinged with the two upper supporting handles, the lower end of the telescopic ladder is respectively connected with the two lower supporting handles, and when the operation platform is lifted, the telescopic ladder is lengthened or shortened.

As a further improvement of the technical scheme of the utility model, the telescopic ladder further comprises a supporting seat, wherein the supporting seat is fixedly connected with the two lower supporting handles, the lower end of the telescopic ladder is hinged with the supporting seat, and when the telescopic ladder is used, the bottom of the supporting seat is abutted with the ground of a trench.

As a further improvement of the technical scheme of the utility model, the utility model further comprises a guardrail, wherein the guardrail is arranged at the edge of the working platform and is far away from the first notch.

As a further improvement of the technical scheme of the utility model, the anti-collision rubber strip also comprises an anti-collision rubber strip, wherein the anti-collision rubber strip covers the outer surface of the first notch of the working platform.

Compared with the prior art, the utility model has the beneficial effects that:

after the auxiliary overhaul device for the head car of the railway vehicle reaches a designated operation position, the first notch of the arc-shaped structure is matched with the front end outer surface structure of the head car of the motor car group, so that the distance between an operator and a fault piece is shortened, a more convenient operation environment can be provided for the operator, a certain safety gap exists between the outer surface of the first notch of the arc-shaped structure and the outer surface of the front end of the head car, the operator cannot drop into the safety gap due to foot loss, and meanwhile, the outer surface of the front end of the railway vehicle cannot be damaged by the operation platform structure forming the first notch;

when carrying out the operation of motor train unit head car fault handling, the supplementary maintenance device of rail vehicle head car of this scheme relies on each gyro wheel to remove above the rail, when reaching the operation position, through operating personnel rotatory rotation first handle and second handle, can adjust the lift of threaded rod for the upper surface of rail is tightly supported to each screw rod, and operating personnel is when carrying out the fault handling operation, owing to the bottom walk the wheel bear a tangential force component along rail direction, can make the maintenance device wholly have gliding risk along rail direction at the during operation, and anti-skidding subassembly can play the tangential force component of restriction maintenance device wholly in rail direction, guarantees operation safe and reliable, reduces the gliding risk during operation.

Drawings

The technology of the present utility model will be described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is an isometric view of the overall structure of the present utility model;

FIG. 2 is a front elevational view of the overall structure of the present utility model;

FIG. 3 is a side view of the overall structure of the present utility model;

fig. 4 is a top view of the overall structure of the present utility model.

Reference numerals:

1-a base; 11-a lower support handle; 12-a third gap;

2-an operation platform; 21-a first gap; 22-a second notch; 23-upper support handles;

3-straight ladder;

4-an anti-slip assembly; 41-a first limiting piece; 42-a second limiting piece; 43-a first handle; 44-a second handle; 45-a first gasket; 46-a second gasket;

a 5-roll prevention assembly; 51-first connection; 52-a second connector; 53-a third stop; 54-fourth limiting piece; 55-a third gasket; 56-fourth shims;

6-a lifting mechanism; 61-a controller; 62-a driver; 621-telescoping rod; 63-a control slot;

7-a roller;

8-guard rails;

9-an anti-collision adhesive tape;

10-supporting seat.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects, and effects of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The same reference numbers will be used throughout the drawings to refer to the same or like parts.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly or indirectly fixed or connected to the other feature. Further, the descriptions of the upper, lower, left, right, etc. used in the present utility model are merely with respect to the mutual positional relationship of the constituent elements of the present utility model in the drawings.

Referring to fig. 1 to 4, an auxiliary overhauling device for a head car of a railway vehicle comprises a base 1, an operation platform 2, a straight ladder 3, a locking mechanism and a plurality of rollers 7, wherein the operation platform 2 is positioned above the base 1, and an overhauling person can stand on the operation platform 2 to overhaul and maintain the head car of the railway vehicle. The two ends of the straight ladder 3 are respectively hinged with the base 1 and the working platform 2, and the working platform 2 can be reached through the straight ladder 3. The utility model discloses a work platform 2 is close to the one end of head car and is equipped with indent first breach 21, and first breach 21 is the arc, first breach 21 with head car external structure matches the butt joint to the staff carries out fault handling and maintenance operation to rail vehicle like EMUs head car, when carrying out rail vehicle like EMUs head car fault handling operation, after the supplementary maintenance device of rail vehicle head car of this scheme reached appointed working position, arc structure's first breach 21 and the first outer surface structure looks adaptation of EMUs head, and there is certain safety gap between arc structure's first breach 21 surface and the head car front end surface, the staff can not fall into this safety gap because of the loss of foot in, simultaneously, form the work platform 2 structures of first breach 21 can not cause the damage to rail vehicle front end surface. The plurality of rollers 7 are all installed the bottom of the base 1 and are respectively located above the steel rails on two sides and walk along the steel rail surface, the plurality of rollers 7 are fixedly installed at the bottom of the base 1 through wheel frames, the wheel frames can be welded at the bottom of the base 1, two ends of wheel shafts of the rollers 7 are connected with limiting holes on the wheel frames through bearings, and the rollers 7 are contacted with the upper surfaces of the steel rails and are used for supporting the base 1 or the maintenance device to integrally walk on the rail surface.

The locking mechanism comprises anti-skid assemblies 4, and at least two groups of anti-skid assemblies 4 are arranged at intervals to ensure that the working platform 2 is in a stable state when the upper surface of the steel rail is propped downwards. The anti-slip assembly 4 comprises a first limiting part 41 and a second limiting part 42 which are identical in structure and symmetrically arranged, the upper end of the first limiting part 41 is in threaded connection with the base 1 in the vertical direction, the lower end of the first limiting part is in butt joint with the upper surface of the steel rail, the anti-slip assembly 4 further comprises a first gasket 45 and a second gasket 46 which are sequentially arranged corresponding to the first limiting part 41 and the second limiting part 42, the first gasket 45 is installed at the bottom end of the first limiting part 41 and is located above the upper surface of one side of the rail, and the second gasket 46 is installed at the bottom end of the second limiting part 42 and is located above the upper surface of the other side of the rail. The first limiting piece 41 and the second limiting piece 42 can be preferably threaded rods, when the auxiliary overhaul device for the head car of the railway vehicle reaches a specified operation position, each threaded rod is rotated to enable the threaded rod to move downwards, each gasket is abutted with the rail surface, the whole overhaul auxiliary device can be prevented from moving along the steel rail due to the rotation of the idler wheel 7, the whole overhaul device is prevented from moving towards the direction close to or far away from the head car in the operation process, and accordingly potential safety hazards of falling and the like of overhaul personnel are caused. The upper end of the first gasket 45 is in threaded connection with the lower end of the first limiting piece 41, and the lower end of the first gasket 45 can be abutted with the upper surface of a steel rail when in use; the upper end of the second gasket 46 is in threaded connection with the lower end of the second limiting member 42, and the lower end of the second gasket 46 can be abutted with the upper surface of another steel rail in use.

Specifically, the anti-slip assembly 4 further comprises a first handle 43 fixedly connected with the first limiting member 41 in a welding manner and a second handle 44 fixedly connected with the second limiting member 42 in a welding manner, the first handle 43 is horizontally arranged and perpendicular to the first limiting member 41, the second handle 44 is horizontally arranged and perpendicular to the second limiting member 42, the first handle 43 can be welded at the upper end of the first limiting member 41, the second handle 44 can be welded at the upper end of the second limiting member 42, and the two handles are arranged to enable the rotation of the two threaded rods to be more convenient.

When the fault treatment operation of the head car of the motor train unit is carried out, the auxiliary maintenance device of the head car of the railway vehicle in the scheme moves above the steel rail by virtue of each roller 7, when the auxiliary maintenance device reaches the operation position, the lifting of each first limiting piece 41 and each second limiting piece 42 can be adjusted by rotating and rotating the first handle 43 and the second handle 44 by an operator, so that each first gasket 45 and each second gasket 46 tightly prop against the upper surface of the steel rail, and when the fault treatment operation is carried out by the operator, the operator can cause the whole maintenance device to have sliding risk along the rail direction during operation because the bottom travelling wheel bears a tangential force component along the rail direction, and the anti-sliding component can play a role in limiting the tangential force component of the whole maintenance device in the rail direction, thereby ensuring the safety and reliability of the operation and reducing the sliding risk during the operation.

Specifically, the locking mechanism further comprises an anti-rolling component 5, the anti-rolling component 5 can be provided with multiple groups, the anti-rolling component 5 comprises a third limiting piece 53 and a fourth limiting piece 54 which are identical in structure and symmetrically arranged, the third limiting piece 53 and the fourth limiting piece 54 can be threaded rods preferably, one end of the third limiting piece 53 is in threaded connection with the base 1 in the horizontal direction, the other end of the third limiting piece 53 is in butt joint with one steel rail side surface, and the end of the fourth limiting piece 54 is in butt joint with the other steel rail side surface. The anti-rolling assembly 5 further comprises a third gasket 55 and a fourth gasket 56 which are sequentially arranged corresponding to the third limiting piece 53 and the fourth limiting piece 54, the third gasket 55 is installed on one side, close to the steel rail, of the third limiting piece 53, and the fourth gasket 56 is installed on one side, close to the steel rail, of the fourth limiting piece 54.

In one embodiment, referring to fig. 2, a third stop 53 and a fourth stop 54 are located between the rails. The third limiting piece 53 and the fourth limiting piece 54 can respectively abut against the inner side surfaces of the two rails, which are close to each other, at the moment, one end of the third gasket 55 is in threaded connection with the end part of the third limiting piece 53, and the other end of the third gasket can abut against the inner side surface of one rail when in use; one end of the fourth spacer 56 is threadedly connected to the end of the fourth stop 54 and the other end is adapted to abut the inner surface of the other rail in use.

In another embodiment, two rails are located between the third stop 53 and the fourth stop 54. One end of the third gasket 55 is in threaded connection with the end part of the third limiting piece 53, and the other end of the third gasket can be abutted with the outer side surface of a steel rail in use; one end of the fourth spacer 56 is threadedly connected to the end of the fourth stop 54 and the other end is adapted to abut the outer surface of the other rail in use.

Specifically, referring to fig. 2, the anti-rolling assembly 5 further includes a first connecting member 51 and a second connecting member 52, which are identical in structure and symmetrically arranged, the first connecting member 51 and the second connecting member 52 may be threaded rods, the upper end of the first connecting member 51 is in threaded connection with the base 1, the lower end of the first connecting member is provided with a first threaded hole into which the third limiting member 53 is inserted, the upper end of the second connecting member 52 is in threaded connection with the base 1, and the lower end of the second connecting member is provided with a second threaded hole into which the fourth limiting member 54 is inserted. The first connecting piece 51 is rotated to adjust the height of the third limiting piece 53 in the vertical direction to be proper, and then the third limiting piece 53 is rotated to drive the third limiting piece 53 to abut against the side surface of the steel rail. Similarly, the second connecting piece 52 is rotated to adjust the height of the fourth limiting piece 54 in the vertical direction to be proper, and then the fourth limiting piece 54 is rotated to drive the fourth limiting piece 54 to abut against the other rail side surface.

When the fault handling operation of the head car of the motor train unit is carried out, the auxiliary maintenance device of the head car of the rail vehicle reaches the designated operation position, the lifting height of each threaded rod in the vertical direction and the horizontal displacement of each threaded rod in the horizontal direction in the anti-rolling assembly 5 can be adjusted by rotating and rotating the first connecting piece 51, the second connecting piece 52, the third limiting piece 53 and the fourth limiting piece 54 by an operator, gaskets are mounted at the end parts of each threaded rod, the gaskets can be tightly propped against the side surfaces of the steel rails, and when the fault handling operation is carried out by the operator, the auxiliary maintenance device of the head car of the rail vehicle of the scheme can cause the rolling component of the head car of the rail vehicle unit to be limited along the direction vertical to the steel rails during the operation, the anti-rolling assembly 5 can ensure the safe and reliable operation and reduce the rolling risk during the operation.

The first gasket 45, the second gasket 46, the third gasket 55 and the fourth gasket 56 can be made of rubber soft materials, and the arrangement of the gaskets can avoid damaging and scratching the outer surface of the steel rail when the upper surface and the side surface of the steel rail are tightly propped during the fault treatment operation of the head car of the motor train unit.

Specifically, the auxiliary overhaul device for the head car of the railway vehicle further comprises a lifting mechanism 6, the lifting mechanism 6 can be preferably a hydraulic lifting mechanism, the lifting mechanism 6 comprises at least one controller 61 and a plurality of drivers 62 arranged at intervals, the output end of each driver 62 is vertically provided with a telescopic rod 621, each driver 62 is used for driving each telescopic rod 621 to synchronously extend or retract, two ends of each telescopic rod 621 are respectively fixedly connected with the base 1 and the working platform 2, the controller 61 can be preferably a hydraulic controller, the drivers 62 can be preferably a hydraulic lifter, and the controller 61 is used for controlling the start and stop of each driver 62 so as to control the lifting of the upper end part of each telescopic rod 621, thereby controlling the stable lifting of the working platform 2. Each telescopic rod 621 is mounted at the output end of each driver 62, each driver 62 can be welded on the base 1, the telescopic rod 621 is vertically arranged between the output end of each driver 62 and the operation platform 2, the end part of the telescopic rod 621 can be fixedly connected with the operation platform 2 through welding, one or more controllers 61 can be arranged, the controllers 61 can be fixedly connected with the base 1 through bolts, the controllers 61 can draw out control lines and are connected with the drivers through the control wire slots 63, and the lower bottom surfaces of the control wire slots 63 can be connected with the base 1 through adhesion.

When one controller is provided, the one controller controls start and stop of all the drivers. When two controllers 61 are provided, referring to fig. 1 and 2, one controller 61 controls the start and stop of each driver 62 on one side and the other controller 61 controls the start and stop of each driver 62 on the other side which are oppositely provided, so as to prevent the start and stop of each driver 62 on one side from being asynchronous, resulting in inconsistent extension lengths of the telescopic links 621 on the same side and damage of related structures such as the telescopic links 621.

Specifically, the straight ladder 3 is a telescopic ladder, and the internal folding structure on the telescopic ladder for realizing the telescopic function in the length direction of the telescopic ladder can refer to a conventional telescopic ladder structure. A second notch 22 is provided on one side of the working platform 2 away from the first notch 21, the second notch 22 is referred to fig. 1 and fig. 4, two sides of the second notch 22 opposite to each other are provided with an upper support handle 23, and the upper support handle 23 is arc-shaped. The base 1 is provided with a third notch 12 corresponding to the second notch 22, the third notch 12 refers to fig. 1, two sides of the third notch 12 opposite to each other are provided with lower support handles 11, and each lower support handle 11 is arc-shaped. The upper end of the telescopic ladder is respectively connected with the two upper supporting handles 23 in a hinged manner, the lower end of the telescopic ladder is respectively connected with the two lower supporting handles 11, and the telescopic ladder stretches or shortens when the working platform 2 is lifted. The auxiliary overhaul device for the head car of the railway vehicle further comprises a supporting seat 10, wherein the supporting seat 10 is fixedly connected with two lower supporting handles 11, the lower end of the telescopic ladder is hinged with the supporting seat 10, and when the auxiliary overhaul device is used, the bottom of the supporting seat 10 is abutted to the ground of a trench. The telescopic ladder upper end is connected in a hinged manner at the end part of the upper support handle 10 far away from the operation platform 2, the telescopic ladder can be adjusted relative to the rotation angle of the operation platform 2, the side surface of the lower end is hinged with the lower support handle 11, when the fault treatment operation of the head car of the motor train unit is carried out, after the auxiliary maintenance device of the head car of the railway vehicle reaches the appointed operation position, due to the fact that the supporting upright post and the trench exist below the steel rail, a certain height difference exists between the ground position of the trench and the base 1, an operator can release the inner folding structure of the telescopic ladder by adjusting the bolt on the side surface of the lower end of the telescopic ladder, and the bottom of the supporting seat 10 is supported by the ground of the trench, so that the telescopic ladder has an auxiliary supporting effect, and meanwhile, the operator can conveniently and rapidly reach the operation platform 2 from the ground of the trench.

Specifically, the auxiliary overhaul device for the head car of the railway vehicle of the scheme further comprises a guardrail 8, wherein the guardrail 8 is arranged at the edge of the working platform 2 and is far away from the first notch 21. The guardrail 8 can be assembled at four corners of the upper top surface of the arc-shaped working platform 2 in a welding mode, and the guardrail 8 has a safety protection effect when working personnel perform motor train unit head car fault treatment operation on the arc-shaped working platform 2.

Specifically, referring to fig. 1 and 4, the auxiliary overhaul device for the head car of the railway vehicle in this scheme further comprises an anti-collision rubber strip 9, and the anti-collision rubber strip 9 covers the outer surface of the first notch 21 of the working platform 2. The anti-collision rubber strip 9 can cover the outer surface of the arc-shaped first notch 21 structure of the operation platform 2 in an adhesion mode, the anti-collision rubber strip 9 can be made of soft rubber materials preferentially, and the operation platform 2 can be prevented from being damaged and scratched on the outer surface of the head car of the motor train unit when the fault treatment operation of the head car of the motor train unit is carried out.

Other contents of the auxiliary overhaul device for the head car of the railway vehicle refer to the prior art, and are not repeated here.

The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.

Claims (10)

1. The utility model provides a supplementary maintenance device of rail vehicle head car which characterized in that: the device comprises a base, an operation platform, a straight ladder, an anti-skid assembly and a plurality of rollers, wherein the operation platform is positioned above the base, two ends of the straight ladder are respectively hinged with the base and the operation platform, one end, close to a head car, of the operation platform is provided with a first notch which is concave inwards, the first notch is matched with the external structure of the head car, and the rollers are arranged at the bottom of the base, are respectively positioned above two steel rails and walk along the steel rails;

the anti-skid assembly comprises a first limiting part and a second limiting part which are identical in structure and symmetrically arranged, wherein the first limiting part is in threaded connection with the base in the vertical direction, when the first limiting part moves downwards, the lower end of the first limiting part is abutted to the upper surface of one steel rail, and when the second limiting part moves downwards, the lower end of the second limiting part is abutted to the upper surface of the other steel rail.

2. The railway vehicle head car auxiliary maintenance device according to claim 1, wherein: the anti-slip assembly further comprises a first handle fixedly connected with the first limiting piece and a second handle fixedly connected with the second limiting piece, wherein the first handle is horizontally arranged and perpendicular to the first limiting piece, and the second handle is horizontally arranged and perpendicular to the second limiting piece.

3. The railway vehicle head car auxiliary maintenance device according to claim 1, wherein: the anti-rolling device comprises a base, and is characterized by further comprising an anti-rolling assembly, wherein the anti-rolling assembly comprises a third limiting part and a fourth limiting part which are identical in structure and are oppositely arranged, one end of the third limiting part is in threaded connection with the base in the horizontal direction, the other end of the third limiting part is in butt joint with one side surface of the steel rail, and the end part of the fourth limiting part is in butt joint with the other side surface of the steel rail.

4. A rail vehicle head car auxiliary service device according to claim 3, characterized in that: the anti-roll assembly further comprises a first connecting piece and a second connecting piece which are identical in structure and symmetrically arranged, wherein the upper end of the first connecting piece is fixedly connected with the base in a detachable mode, and a first threaded hole for the third limiting piece to be inserted is formed in the lower end of the first connecting piece.

5. The railway vehicle head car auxiliary maintenance device according to claim 1, wherein: the lifting mechanism comprises a plurality of drivers, the output end of each driver is vertically provided with a telescopic rod, when the drivers are started, the telescopic rods extend or retract, and the two ends of each telescopic rod are fixedly connected with the base and the operation platform respectively.

6. The railway vehicle head car auxiliary service device according to claim 5, wherein: the straight ladder is an extension ladder.

7. The railway vehicle head car auxiliary service device according to claim 6, wherein: the utility model discloses a work platform, including first breach, second breach, base, telescopic ladder, second breach, first breach, second breach, third breach, upper end and two of telescopic ladder are connected with the upper support handle is articulated respectively, the lower extreme is connected with two lower support handle respectively, when work platform goes up and down, telescopic ladder extension or shorten.

8. The railway vehicle head car auxiliary service device according to claim 7, wherein: the telescopic ladder is characterized by further comprising a supporting seat, wherein the supporting seat is fixedly connected with the two lower supporting handles, the lower end of the telescopic ladder is hinged with the supporting seat, and when the telescopic ladder is used, the bottom of the supporting seat is abutted to the ground of a trench.

9. The railway vehicle head car auxiliary maintenance device according to claim 1, wherein: the guardrail is installed at the edge of the operation platform and is far away from the first notch.

10. The railway vehicle head car auxiliary maintenance device according to claim 1, wherein: the anti-collision rubber strip is covered on the outer surface of the first notch of the working platform.