Movable boarding ladder for railway vehicle

Abstract

The utility model discloses a movable boarding ladder for a railway vehicle in the technical field of rail transit, and aims to solve the problems that the existing boarding ladder is complicated in structure and cannot be suitable for being used in slope occasions and the like. The lifting device comprises a movable lifting device installed between a lifting platform and a boarding frame. The movable lifting device comprises two sets of supporting rods which are connected in a hinged mode and connected between the upper square frame and the lower square frame, and the supporting rods in the same direction in the two sets of supporting rods which are connected in a hinged mode are connected through a transverse rod. Moving wheels and trundle ground brake devices are correspondingly arranged on the periphery of the lower square frame. The pressure relief pedal plate and the hydraulic cylinder are matched and are jointly assembled on the lower square frame; the pressure relief pedal is connected with the hydraulic cylinder through the control valve; a hydraulic rod of the hydraulic cylinder is fixedly connected with the cross rod; the pressure relief pedal is treaded, the hydraulic rod of the hydraulic cylinder stretches out and draws back, the lower frame stretches out or draws back relative to the ground, and the moving wheels are supported on the ground or away from the ground. The boarding ladder is suitable for boarding scenes, and the manufacturing cost and weight of the boarding ladder are reduced.

Description

Technical Field

[0001] The utility model relates to a movable boarding ladder for rail vehicles, belonging to the technical field of rail transit. Background Art

[0002] When a rail vehicle is parked on rails at different heights, it is necessary to board the vehicle through a boarding ladder for relevant operations. Considering the relatively high position of the rail vehicle door, the boarding ladder needs to be moved relatively frequently. There is a type of existing boarding ladder that uses a crank structure, controls the rotation of an operating rod and the lever principle to achieve the movement of the boarding ladder in the height direction, and uses the self-locking principle to lock the crank mechanical structure, so as to realize the movement and function of the boarding ladder by moving wheels. When operating the operating rod, when crossing the self-locking point, due to inertia, the hands and arms are prone to collide with the boarding ladder, which has potential operation safety hazards, and affected by the rail surface height, it cannot meet the adjustment function in the height direction. Another type of existing boarding ladder device contains a majority of electronic controls, making the overall weight heavier, inconvenient for maintenance, and the equipment is expensive. At the same time, the existing boarding ladder cannot park and operate or move on a certain slope.

[0003] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0004] The purpose of the present utility model is to overcome the deficiencies in the prior art and provide a movable boarding ladder for rail vehicles, which can realize parking and operation or movement of the boarding ladder on a slope, and the overall structure is light and convenient for operators to operate.

[0005] To achieve the above purpose, the present utility model is implemented by the following technical solutions:

[0006] The present utility model provides a movable boarding ladder for rail vehicles, including a movable lifting device, a lifting platform and a boarding frame; the boarding frame is inclined, and the upper end of the boarding frame is movably connected with the upper end of the lifting platform in a matching manner, and the lower end of the boarding frame and the lower end of the lifting platform are supported on the ground;

[0007] The movable lifting device includes an upper square frame, a lower square frame, a support rod, a hydraulic cylinder and a caster brake device; the upper square frame is arranged between the boarding frame and the lifting platform and is not in contact with the ground; the tops of two groups of hinged support rods are respectively connected to the left and right sides of the upper square frame, and the bottoms are respectively connected to the left and right sides of the lower square frame, and the same-direction support rods in the two groups of hinged support rods are connected by a cross bar; the lower square frame is provided with moving wheels and the caster brake device around it; a caster brake device is arranged near each moving wheel;

[0008] The pressure relief foot pedal cooperates with the hydraulic cylinder and is assembled on the lower square frame together; the pressure relief foot pedal is connected to the hydraulic cylinder through a control valve; the hydraulic rod of the hydraulic cylinder is fixedly connected to the cross bar; stepping on the pressure relief foot pedal, the hydraulic rod of the hydraulic cylinder expands and contracts, so that under the action of the rotation of the hinged support rod, the lower frame extends or retracts relative to the ground, so that the moving wheels support on the ground or move away from the ground.

[0009] Further, the boarding frame and the lifting platform are connected by two spaced profile plates; the upper square frame is fixed between the two profile plates.

[0010] Further, it further includes support columns; a plurality of the support columns are symmetrically arranged on the outer sides of the two profile plates respectively; the bottom ends of the support columns are in the same plane as the lower ends of the boarding frame and the lifting platform;

[0011] When the moving wheels are in the state of moving away from the ground, a plurality of the support columns and the lower ends of the boarding frame and the lifting platform jointly support on the ground; when the moving wheels support on the ground and are in the moving state, a plurality of the support columns and the lower ends of the boarding frame and the lifting platform are away from the ground.

[0012] Further, the lifting platform includes a column and a standing platform; the standing platform is connected with the two columns through a toothed slide rail.

[0013] Further, the upper end of the boarding frame is hinged to the front end of the standing platform; hinge plates are respectively arranged at the lower end of the boarding frame and the profile plate; an arc-shaped hinge groove is arranged on the hinge plate; a first T-shaped bolt passes through the two arc-shaped hinge grooves in sequence, so that the boarding frame is movably connected with the profile plate.

[0014] Further, the upper square frame is connected to the profile plate through a second T-shaped bolt.

[0015] Further, the boarding frame includes a boarding pedal and handrails; the two handrails are arranged on both sides of the boarding pedal.

[0016] Further, anti-slip patterns are arranged on the boarding pedal.

[0017] Further, the handrails are made of aluminum frames lapped.

[0018] Further, the moving wheels include fixed wheels and universal wheels; the two fixed wheels are arranged at the front end of the lower square frame, and the two universal wheels are arranged at the rear end of the lower square frame.

[0019] Compared with the prior art, the beneficial effects achieved by the present utility model:

[0020] The device of the present application is a mobile lifting device between the boarding frame and the lifting platform. By stepping on the pressure-relieving foot pedal to control the telescopic hydraulic rod of the hydraulic cylinder, the hinged support rod is extended or folded, so that the lower square frame extends or retracts relative to the ground, so that the moving wheels contact the ground for movement, or move away from the ground, so that the boarding frame and the lifting platform stop for operation; or, when encountering a work site with a certain slope, step on the pressure-relieving foot pedal, so that the hydraulic rod of the hydraulic cylinder extends to push the lower square frame to extend downward, and the moving wheels support on the ground for movement. After being pushed to the sloping work site, step on the caster ground brake device to contact the ground and prevent the moving wheels from moving, realizing the parking and locking functions of the boarding frame, and the overall structure of the boarding ladder is light, which is beneficial for the operator to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of a movable boarding ladder for rail vehicles provided by the present invention;

[0022] Figure 2 is Figure 1 the specific structural schematic diagram of the mobile lifting device in

[0023] Figure 3 is the split schematic diagram between the boarding frame and the lifting platform;

[0024] Figure 4 is the structural schematic diagram of the hinge plate;

[0025] Figure 5 is the structural schematic diagram of the existing caster ground brake device;

[0026] In the figure: 1. Mobile lifting device; 2. Lifting platform; 3. Boarding frame; 4. Upper square frame; 5. Lower square frame; 6. Support rod; 7. Hydraulic cylinder; 8. Caster ground brake device; 9. Cross bar; 10. Moving wheel; 11. Pressure-relieving foot pedal; 12. Support column; 13. Column; 14. Standing platform; 15. Hinge plate; 16. Arc-shaped hinge groove; 17. Boarding pedal; 18. Handrail; 19. Profile plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] Refer to Figures 1 to 5, this embodiment provides a movable boarding ladder for rail vehicles, which includes a movable lifting device, a lifting platform 2 and a boarding frame 3. The boarding frame 3 is inclined, the upper end of the boarding frame 3 is movably connected to the upper end of the lifting platform 2 in a matching manner, and the lower ends of both the boarding frame 3 and the lifting platform 2 are supported on the ground. The upper end of the boarding frame 3 and the upper end of the lifting platform 2 are connected in a matching and movable manner.

[0029] As Figure 2 , the mobile lifting device 1 includes an upper square frame 4, a lower square frame 5, a support rod 6, a hydraulic cylinder 7 and a caster braking device 8. Among them, the caster braking device 8 adopts an existing structure. The upper square frame 4 is arranged between the boarding frame 3 and the lifting platform. Specifically, the boarding frame 3 and the lifting platform 2 are connected to each other by two spaced profile plates 19. The upper square frame 4 is assembled between each profile plate 19 and is not in contact with the ground. The tops of two groups of hinged support rods 6 are respectively hinged to the left and right sides of the square frame, and the bottoms are respectively hinged to the left and right sides of the lower square frame 5. The hinged support rod 6 specifically refers to two support rods 6 arranged crosswise, and the crosswise part is connected by a hinge manner, so that the support rod 6 can be folded and extended, thereby driving the lower square frame 5 to extend or retract. The same-direction support rods 6 in two groups of crosswise support rods 6 are fixedly connected by a cross bar 9. Such a setting can increase the support strength of the support rod 6 and improve the overall stability of the boarding frame 3.

[0030] The lower square frame 5 is fixedly equipped with moving wheels 10 and caster braking devices 8 around it, and there is an existing caster braking device 8 near each moving wheel 10, as Figure 5 , such a setting facilitates the caster braking device 8 to assist in controlling the accurate parking of the corresponding moving wheel 10 on the slope. The pressure relief foot pedal 11 cooperates with the hydraulic cylinder 7 and is jointly installed on the lower square frame 5. During installation, the pressure relief foot pedal 11 is connected to the hydraulic cylinder 7 through a control valve, so that when the pressure relief foot pedal 11 is stepped on, the hydraulic rod of the hydraulic cylinder 7 can be controlled to extend and retract through the control valve. The hydraulic rod of the hydraulic cylinder 7 is fixedly connected to the cross bar 9. When the pressure relief foot pedal 11 is stepped on to control the extension and retraction of the hydraulic rod of the hydraulic cylinder 7, under the action of the rotation of the hinged support rod 6, the lower frame extends or retracts relative to the ground, so that the moving wheel 10 supports on the ground or moves away from the ground.

[0031] There are two usage states:

[0032] When moving and parking on a flat ground, directly step on the pressure relief foot pedal 11 to control the extension and retraction of the hydraulic rod of the hydraulic cylinder 7, so that the moving wheel 10 supports on the ground for movement, or retracts away from the ground so that the lower ends of the boarding frame 3 and the lifting platform 2 support on the ground for parking operations. The overall operation structure is light, which can facilitate the operator to move easily and overcome the problem that the existing electric drive control and other boarding ladders are too heavy and difficult to push.

[0033] When moving or parking on a ground with a certain slope, first step on the pressure relief foot pedal 11 to control the telescopic movement of the hydraulic rod of the hydraulic cylinder 7, so that the moving wheels 10 support on the ground for moving and pushing. When parking on a slope, in addition to stepping on the pressure relief foot pedal 11 to control the hydraulic rod of the hydraulic cylinder 7 to retract away from the ground so that the lower end of the boarding frame 3 and the lower end of the lifting platform 2 support on the ground, at the same time step on the caster brake device 8, so that the caster brake device 8 supports on the ground to prevent the moving wheels 10 from moving forward or backward, so that the whole boarding ladder is parked and locked.

[0034] Optionally, the moving wheels 10 mainly include fixed wheels and swivel wheels. Fixed wheels are respectively installed on both sides of the front end of the lower square frame 5, and swivel wheels are respectively installed on both sides of the rear end. During the moving process, the fixed wheels maintain the certainty of the walking direction, and the swivel wheels can adjust the moving angle and direction, thereby improving the overall flexibility of the boarding ladder.

[0035] Optionally, combined with Figure 1 and Figure 3 The movable boarding ladder for rail vehicles further includes support columns 12. On the outer sides of the two profiles, a plurality of support points are symmetrically installed. In this embodiment, four support columns 12 are provided. When installing the support columns 12, the bottom end surfaces of the support columns 12 and the lower ends of the boarding frame 3 and the lifting platform 2 are in the same plane. In the use state (1), when the moving wheels 10 retract away from the ground, the support columns 12 and the lower ends of the boarding frame 3 and the lifting platform 2 jointly support on the ground, improving the stability and safety of using the boarding ladder.

[0036] Optionally, the lifting platform 2 includes columns 13 and a standing platform 14. The standing platform 14 is respectively connected with the two columns 13 through toothed slide rails, and can make the standing platform 14 move up and down along the columns 13, so as to adjust the docking relationship between the standing platform 14 and the entrance of the rail vehicle, ensuring the safety of pedestrians.

[0037] Optionally, the upper end of the boarding frame 3 is hinged to the front end of the standing platform 14, and hinge plates 15 are respectively installed on the lower end of the boarding frame 3 and the profile plate 19. As Figure 4 , an arc-shaped hinge groove 16 is formed on the hinge plate 15. The first T-shaped bolt sequentially passes through the arc-shaped hinge groove 16 of the hinge plates 15 on the boarding frame 3 and the profile plate 19, so that the boarding frame 3 and the profile plate 19 are movably connected. The purpose of this setting is that when the standing platform 14 moves up and down, the upper end of the following boarding frame 3 rotates around the hinge point, and the lower end of the boarding frame 3 drives the first T-shaped bolt to move relatively along the arc-shaped hinge groove 16, so that the boarding frame 3 rotates and tilts relative to the profile plate 19. The upper square frame 4 and the profile plate 19 are fixedly connected by a second T-shaped bolt, and the height position of the upper square frame 4 relative to the profile plate 19 is adjusted by the second T-shaped bolt according to actual needs.

[0038] Optionally, the boarding frame 3 includes a boarding pedal 17 and handrails 18. A handrail 18 is installed on each side of the boarding pedal 17, and the handrails 18 are formed by overlapping aluminum frames to improve the stability of the handrails 18. The tread surface of the boarding pedal 17 is provided with anti-slip patterns to prevent pedestrians from slipping when boarding.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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. In addition, the terms "first", "second", etc. 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", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0041] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A movable boarding ladder for a rail vehicle, characterized in that: It includes a mobile lifting device, a lifting platform and a vehicle boarding frame; the vehicle boarding frame is tilted, and the upper end of the vehicle boarding frame is movably connected with the upper end of the lifting platform, and the lower end of the vehicle boarding frame and the lower end of the lifting platform are supported on the ground; The mobile lifting device comprises an upper square frame, a lower square frame, a support rod, a hydraulic cylinder and a caster brake device; the upper square frame is arranged between the boarding frame and the lifting platform and is not in contact with the ground; the top ends of two groups of hinged support rods are respectively connected to the left and right sides of the upper square frame, and the bottom ends are respectively connected to the left and right sides of the lower square frame, and the same-direction support rods in the two groups of hinged support rods are connected by a cross bar; the lower square frame is provided with moving wheels and the caster brake device around; a caster brake device is provided near each moving wheel; The pressure relief foot pedal cooperates with the hydraulic cylinder and is jointly assembled on the lower square frame; the pressure relief foot pedal is connected to the hydraulic cylinder through a control valve; the hydraulic rod of the hydraulic cylinder is fixedly connected to the cross bar; when the pressure relief foot pedal is stepped on, the hydraulic rod of the hydraulic cylinder is extended and retracted, so that under the action of the rotation of the hinged support rod, the lower frame is extended or retracted relative to the ground, so that the moving wheel is supported on the ground or away from the ground.

2. The movable boarding ladder for rail vehicles according to claim 1, characterized in that: The boarding frame and the lifting platform are connected via two spaced profile plates; the upper square frame is fixed between the two profile plates.

3. The movable boarding ladder for rail vehicles according to claim 2, characterized in that: It also includes support columns; a plurality of the support columns are symmetrically arranged on the outer sides of the two profile plates; the bottom ends of the support columns are in the same plane as the lower ends of the boarding frame and the lifting platform; When the moving wheels are in a state of being away from the ground, the multiple support columns and the lower ends of the boarding frame and the lifting platform are jointly supported on the ground; when the moving wheels are supported on the ground for movement, the multiple support columns and the lower ends of the boarding frame and the lifting platform are away from the ground.

4. The movable boarding ladder for rail vehicles according to claim 2, characterized in that: The lifting platform comprises a column and a standing platform; the standing platform is connected to the two columns via a toothed slide rail.

5. The movable boarding ladder for rail vehicles according to claim 4, characterized in that: The upper end of the boarding frame is hingedly connected to the front end of the standing platform; the lower end of the boarding frame and the profile plate are respectively provided with hinge plates; the hinge plate is provided with an arc-shaped hinge groove; the first T-shaped bolt passes through the two arc-shaped hinge grooves in sequence, so that the boarding frame is movably connected to the profile plate.

6. The movable boarding ladder for rail vehicles according to claim 5, characterized in that: The upper square frame is connected to the profile plate by a second T-bolt.

7. The movable boarding ladder for rail vehicles according to claim 1, characterized in that: The boarding frame comprises a boarding pedal and a handrail; the two handrails are arranged on both sides of the boarding pedal.

8. The movable boarding ladder for rail vehicles according to claim 7, characterized in that: The boarding pedal is provided with anti-skid patterns.

9. The movable boarding ladder for rail vehicles according to claim 7, characterized in that: The handrail is formed by overlapping aluminum frames.

10. The movable boarding ladder for rail vehicles according to claim 1, characterized in that: The moving wheels include fixed wheels and universal wheels; the two fixed wheels are arranged at the front end of the lower square frame, and the two universal wheels are arranged at the rear end of the lower square frame.

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