Safe fixing device for top climbing ladder of motor train unit

Abstract

The utility model relates to the technical field of climbing ladders, and discloses a motor train unit climbing ladder safety fixing device which comprises a bottom plate, the left side and the right side of the top end of the bottom plate are both rotationally connected with lead screws, a motor is fixedly installed in the middle of the bottom plate, the output end of the motor is fixedly connected with a rotating rod, and the other end of the rotating rod is fixedly connected with two first synchronizing wheels. The front sides of the two lead screws are fixedly connected with second synchronous wheels, first synchronous belts are arranged on the outer sides of the first rear synchronous wheel and the second left synchronous wheel, second synchronous belts are arranged on the outer sides of the first front synchronous wheel and the second right synchronous wheel, the outer sides of the lead screws are in threaded connection with moving blocks, and the top ends of the two moving blocks are rotationally connected with an outer ladder. According to the utility model, the climbing ladder does not need to be manually held by a plurality of persons, so that the waste of human resources is reduced, the workload of escalator personnel is reduced, the phenomenon that the escalator personnel slip and fall due to displacement and sliding of the climbing ladder is reduced, and the stability and the safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of climbing ladders, in particular to a safety fixing device for a climbing ladder of a motor vehicle group. Background Art

[0002] The EMU climbing ladder is a special equipment, mainly used for the inspection and maintenance of EMU trains. When the EMU train needs to be inspected, repaired or cleaned on the roof or bottom of the train, the climbing ladder plays a key role. This equipment allows staff to safely and conveniently reach the top or bottom of the EMU train to perform necessary operations.

[0003] After searching, a Chinese patent with publication number CN215663200U discloses a safe vehicle-mounted climbing ladder. The general climbing ladder has a simple structure, and the safety of the equipment cannot be fully guaranteed when in use. When used in various complex terrains, the force on the bottom end of the ladder is unstable and it is easy to slide, thereby affecting the overall use effect of the equipment. Therefore, the equipment can be made more stable when in use, and the rear end will no longer slide. It is also more convenient to adjust the angle of the equipment, thereby greatly improving the stability of the equipment when in use, ensuring the quality of the equipment, and providing a certain protection effect on both ends of the equipment to prevent the equipment from falling due to the user's own shaking during use, greatly improving the safety of the equipment when in use, and improving the working effect of the equipment.

[0004] There are still some shortcomings in the use of the above-mentioned climbing ladder. When repairing the top of the EMU, due to the high body of the vehicle, the on-board mechanic needs multiple people to hold the ladder to ensure that the ladder is stably hung on the body of the vehicle during the climbing process, which wastes human resources and increases the workload of the ladder personnel. If the ladder personnel carry maintenance tools, the tools may slip and hit the ladder personnel, causing injuries to the ladder personnel. The climbing ladder has no safety fixing device, which is prone to displacement and shaking, and the stability is relatively weak. When the mechanic goes up and down the roof, the ladder is easy to slide, etc., and it is easy to slip and fall. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a safety fixing device for a train set climbing ladder.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a safety fixing device for climbing ladder of EMU comprises a base plate, the left and right sides of the top of the base plate are rotatably connected with screw rods, a motor is fixedly installed in the middle of the base plate, the output end of the motor is fixedly connected with a rotating rod, the other end of the rotating rod is fixedly connected with two synchronous wheels 1, the front sides of the two screw rods are fixedly connected with synchronous wheels 2, the outer sides of the rear side synchronous wheels 1 and the left side synchronous wheels 2 are provided with synchronous belt 1, the outer sides of the front side synchronous wheels 1 and the right side synchronous wheels 2 are provided with synchronous belt 2, the outer side of the screw rod is threadedly connected with a moving block, the top ends of the two moving blocks are rotatably connected with an outer ladder, the left and right sides of the outer ladder are rotatably connected with connecting rods, the other ends of the connecting rods on the left and right sides are rotatably connected to the left and right rear ends of the base plate, the left and right sides of the rear end of the base plate are rotatably connected with support rods, and a plurality of support grooves are provided on the rear side of the outer ladder.

[0007] As a further description of the above technical solution:

[0008] The top ends of the left and right sides of the inner part of the outer ladder are fixedly connected with fixed blocks, and the outer sides of the two fixed blocks are slidably connected with an extension ladder. The top ends of the left and right sides of the outer ladder are fixedly connected with an outer shell, and the inner side of the outer shell is slidably connected with a limit plate, a threaded rod is fixedly connected to the middle part of the limit plate, a spring is fixedly connected to the front side of the limit plate, a nut is threadedly connected to the outer side of the threaded rod, and a plurality of slots are provided on the left and right sides of the front end of the extension ladder.

[0009] As a further description of the above technical solution:

[0010] Protective pads are arranged on both left and right sides of the rear end of the outer ladder, and one end of the threaded rod is rotatably connected with a pull ring.

[0011] As a further description of the above technical solution:

[0012] The left and right sides of the outer ladder are both fixedly connected with protective plates, and the top front side of the bottom plate is fixedly connected with a protective shell.

[0013] As a further description of the above technical solution:

[0014] The other end of the support rod is rotatably connected to a rotating plate, and a bolt penetrates the middle of the rotating plate.

[0015] As a further description of the above technical solution:

[0016] The outer side of the bolt is threadedly connected with a nut, and a plurality of thread grooves are arranged on both left and right sides of the rear end of the outer ladder.

[0017] As a further description of the above technical solution:

[0018] Two soft rubber plugs are arranged on the rear side of the top end of the extension ladder, and the other end of the spring is fixedly connected to the inner front side of the shell.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, through the mutual cooperation of the screw rod, the first synchronous wheel, the second synchronous wheel, the first synchronous belt, the second synchronous belt, the moving block, the connecting rod, the supporting rod and the supporting groove, the fixing effect is increased during the use of the climbing ladder, and the climbing ladder is convenient to use according to the angle required, so as to flexibly adjust the climbing ladder angle, and there is no need for multiple people to manually hold the climbing ladder, which is conducive to reducing the waste of human resources, thereby reducing the workload of the escalator personnel, and reducing the displacement and sliding of the climbing ladder, which causes the climbers to slip and fall, thereby improving stability and enhancing safety.

[0021] 2. In the utility model, through the cooperation of the fixed block, the extension ladder, the shell, the limit plate, the threaded rod, the spring, the nut and the slot, the height of the climbing ladder is increased to facilitate the maintenance according to the needs of the EMU, thereby flexibly adjusting the height of the climbing ladder manually, enhancing the flexibility and adjustability of the climbing ladder, which is conducive to adapting to the maintenance of EMUs at different heights, thereby helping to improve the work efficiency of the maintenance and increase convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the EMU climbing ladder safety fixing device proposed by the utility model;

[0023] Figure 2 This is a schematic diagram of the support rod structure of the EMU climbing ladder safety fixing device proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the moving block of the EMU climbing ladder safety fixing device proposed by the utility model;

[0025] Figure 4 This is a schematic diagram of the fixing block structure of the EMU climbing ladder safety fixing device proposed by the utility model;

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 The utility model is a schematic diagram of the extended ladder structure of the EMU climbing ladder safety fixing device.

[0028] Legend:

[0029] 1. Bottom plate; 2. Screw rod; 3. Motor; 4. Rotating rod; 5. Synchronous wheel 1; 6. Synchronous wheel 2; 7. Synchronous belt 1; 8. Synchronous belt 2; 9. Moving block; 10. External ladder; 11. Connecting rod; 12. Support rod; 13. Support groove; 14. Fixed block; 15. Extension ladder; 16. Housing; 17. Limiting plate; 18. Threaded rod; 19. Spring; 20. Nut; 21. Slot; 22. Protective pad; 23. Pull ring; 24. Protective plate; 25. Protective shell; 26. Rotating plate; 27. Bolt; 28. Nut; 29. ​​Threaded groove; 30. Soft rubber plug. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference Figure 1-6 The utility model provides an embodiment: a safety fixing device for climbing ladder of a train set, comprising a bottom plate 1, the top left and right sides of the bottom plate 1 are both rotatably connected with screw rods 2, a motor 3 is fixedly installed in the middle of the bottom plate 1, the output end of the motor 3 is fixedly connected with a rotating rod 4, driving the rotating rod 4 to rotate, the other end of the rotating rod 4 is fixedly connected with two synchronous wheels 1 5, the front sides of the two screw rods 2 are both fixedly connected with synchronous wheels 2 6, a synchronous belt 1 7 is arranged outside the rear synchronous wheel 1 5 and the left synchronous wheel 2 6, and a synchronous belt 2 8 is arranged outside the front synchronous wheel 1 5 and the right synchronous wheel 2 6, so that the two synchronous wheels 1 5 are connected to the synchronous belt 1 7 and the synchronous belt 8. Under the action of the second 8, the two synchronous wheels 6 are driven to rotate, and the outer side of the screw rod 2 is threadedly connected with a moving block 9, which drives the bottom end of the outer ladder 10 to move, which is beneficial to the angle adjustment. The top ends of the two moving blocks 9 are rotatably connected with the outer ladder 10, and the left and right sides of the outer ladder 10 are rotatably connected with connecting rods 11, which is convenient for pulling the outer ladder 10 to adjust the angle. The other ends of the left and right connecting rods 11 are rotatably connected to the left and right rear ends of the base plate 1, and the left and right sides of the rear end of the base plate 1 are rotatably connected with support rods 12. A plurality of support grooves 13 are arranged on the rear side of the outer ladder 10, and the support rods 12 are supported inside the support grooves 13 to improve the supporting effect.

[0032] The top ends of the left and right sides of the inner part of the outer ladder 10 are fixedly connected with fixed blocks 14, and the outer sides of the two fixed blocks 14 are slidably connected with an extension ladder 15, which improves the stability of the extension ladder 15. The top ends of the left and right sides of the outer ladder 10 are fixedly connected with a shell 16, and the inner side of the shell 16 is slidably connected with a limiting plate 17, which is convenient for limiting the threaded rod 18. The middle part of the limiting plate 17 is fixedly connected with a threaded rod 18 for easy engagement with the slot 21. The front side of the limiting plate 17 is fixedly connected with a spring 19, which increases the rebound pushing effect on the threaded rod 18. The outer side of the threaded rod 18 is threadedly connected with a nut 20 for fixing the position of the threaded rod 18. A plurality of slots 21 are provided on the left and right sides of the front end of the extension ladder 15, and protective pads 22 are provided on the left and right sides of the rear end of the outer ladder 10 to protect the part of the outer ladder 10 in contact with the motor vehicle. A pull ring 23 is rotatably connected to the end to facilitate pulling the threaded rod 18. Protective plates 24 are fixedly connected to the left and right sides of the outer ladder 10 to play a protective role. A protective shell 25 is fixedly connected to the top front side of the bottom plate 1 to protect the synchronous wheel. The other end of the support rod 12 is rotatably connected to a rotating plate 26. A bolt 27 runs through the middle of the rotating plate 26. The outer side of the bolt 27 is threadedly connected to a nut 28. A plurality of threaded grooves 29 are provided on the left and right sides of the rear end of the outer ladder 10 to facilitate fixing the supported support rod 12 to prevent the support rod 12 from shifting and sliding, thereby enhancing the supporting effect. Two soft rubber plugs 30 are provided on the rear side of the top of the extension ladder 15, so that the soft rubber plug 30 is inserted into the drainage hole at the top of the motor vehicle, thereby enhancing the fixation of the climbing ladder. The other end of the spring 19 is fixedly connected to the inner front side of the outer shell 16 to improve the stability of the spring 19.

[0033] Working principle: When the climbing ladder is used, first place the climbing ladder in front of the roof of the motor vehicle that needs to be repaired, and then start the motor 3. The motor 3 drives the rotating rod 4 to rotate, so that the rotating rod 4 drives the two synchronous wheels 5 to rotate, and then the front synchronous wheel 15 drives the left synchronous wheel 2 6 to rotate under the action of the synchronous belt 2 8, and the rear synchronous wheel 15 drives the left synchronous wheel 2 6 to rotate under the action of the synchronous belt 7, so as to facilitate the rotation of the two screw rods 2, so that the screw rod 2 drives the two moving blocks 9 to move, and under the pulling of the connecting rod 11, the outer ladder 10 is rotated to an angle, and then the two support rods 12 are rotated and supported to the inside of the corresponding support grooves 13, so as to improve the supporting force and stability of the outer ladder 10, and there is no need for multiple people to manually hold the climbing ladder, which is conducive to reducing the waste of human resources, thereby The workload of the escalator personnel is reduced, and the phenomenon of displacement and sliding of the climbing ladder, which causes the climbing personnel to fall, is reduced, thereby improving stability and enhancing safety. Then, when adjusting the length of the climbing ladder, the nut 20 is loosened, and the threaded rods 18 on both sides are pulled so that the threaded rods 18 are released from the engaging state with the corresponding slots 21, and then the extension ladder 15 is pulled so that the extension ladder 15 slides on the outside of the two fixing blocks 14. After sliding to the required length, the threaded rod 18 is loosened, and under the pushing action of the spring 19 on the limit plate 17, the threaded rod 18 is pushed to engage with the corresponding slot 21, and then the nut 28 is tightened to fix the position of the extension ladder 15, thereby enhancing the flexibility and adjustability of the climbing ladder, which is conducive to adapting to the maintenance of motor vehicles at different heights, thereby helping to improve the maintenance work efficiency and increase convenience.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety fixing device for a train climbing ladder, comprising a bottom plate (1), characterized in that: The top and left sides of the bottom plate (1) are both rotatably connected to screw rods (2); a motor (3) is fixedly installed in the middle of the bottom plate (1); the output end of the motor (3) is fixedly connected to a rotating rod (4); the other end of the rotating rod (4) is fixedly connected to two synchronous wheels (5); the front sides of the two screw rods (2) are both fixedly connected to synchronous wheels (6); a synchronous belt (7) is arranged outside the synchronous wheel (5) on the rear side and the synchronous wheel (6) on the left side; a synchronous belt (7) is arranged outside the synchronous wheel (5) on the front side and the synchronous wheel (6) on the right side. 6) A synchronous belt 2 (8) is arranged on the outside, a moving block (9) is threadedly connected to the outside of the screw rod (2), the top ends of the two moving blocks (9) are rotatably connected to an outer ladder (10), the left and right sides of the outer ladder (10) are rotatably connected to connecting rods (11), the other ends of the connecting rods (11) on the left and right sides are rotatably connected to the left and right rear ends of the base plate (1), the left and right sides of the rear end of the base plate (1) are rotatably connected to support rods (12), and a plurality of support grooves (13) are arranged on the rear side of the outer ladder (10).

2. The safety fixing device for climbing ladder of EMU according to claim 1 is characterized in that: The top ends of the left and right sides of the inner part of the outer ladder (10) are fixedly connected with fixed blocks (14), and the outer sides of the two fixed blocks (14) are slidably connected with an extension ladder (15). The top ends of the left and right sides of the outer ladder (10) are fixedly connected with a shell (16), and the inner side of the shell (16) is slidably connected with a limit plate (17), and the middle part of the limit plate (17) is fixedly connected with a threaded rod (18), and the front side of the limit plate (17) is fixedly connected with a spring (19), and the outer side of the threaded rod (18) is threadedly connected with a nut (20), and the front end of the extension ladder (15) is provided with a plurality of slots (21) on both sides.

3. The safety fixing device for climbing ladder of EMU according to claim 2 is characterized in that: Protection pads (22) are provided on both left and right sides of the rear end of the outer ladder (10), and one end of the threaded rod (18) is rotatably connected to a pull ring (23).

4. The safety fixing device for climbing ladder of EMU according to claim 1 is characterized in that: The left and right sides of the outer ladder (10) are both fixedly connected with protective plates (24), and the top front side of the base plate (1) is fixedly connected with a protective shell (25).

5. The safety fixing device for climbing ladder of EMU according to claim 1 is characterized in that: The other end of the support rod (12) is rotatably connected to a rotating plate (26), and a bolt (27) penetrates the middle of the rotating plate (26).

6. The safety fixing device for climbing ladder of EMU according to claim 5 is characterized in that: The outer side of the bolt (27) is threadedly connected to a nut (28), and a plurality of thread grooves (29) are provided on both left and right sides of the rear end of the outer ladder (10).

7. The safety fixing device for climbing ladder of EMU according to claim 2 is characterized in that: Two soft rubber plugs (30) are arranged at the rear side of the top end of the extension ladder (15), and the other end of the spring (19) is fixedly connected to the inner front side of the housing (16).

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