Train freight carriage small door disassembling and assembling vehicle
By installing a multi-stage mast and hydraulic system on a forklift, the small door can be suspended and moved, solving the problems of high labor intensity and low efficiency in disassembling and assembling small doors of train freight cars, and realizing a safe and efficient disassembly and assembly process.
Patent Information
- Application Number
- CN202520588488.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-31
AI Technical Summary
The disassembly and assembly of small doors in train freight cars is labor-intensive, inefficient, and unsafe. Existing door-assisted installation methods are still time-consuming and labor-intensive.
A vehicle for disassembling and assembling small doors for train freight cars was designed. It uses a forklift equipped with first-level, second-level, and third-level masts, combined with hydraulic telescopic rods and winches. The small door is suspended in the air by a cantilever mechanism and moved to the installation position by the forklift, simplifying the disassembly and assembly process.
This technology enables time-saving and labor-saving installation of small doors, reduces the labor intensity of workers, improves disassembly and assembly efficiency, and ensures operational safety.
Smart Images

Figure CN223837049U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a train door closing tool, and more particularly to a small door disassembly and assembly vehicle for train freight cars. Background Technology
[0002] For railway freight transport, the goods being transported are loaded into the freight cars of the train. In addition to the middle door, each freight car of the train has four small doors for easy observation and loading and unloading of goods. There are small doors on both sides of each middle door.
[0003] As freight cargo squeezes the small doors, they become deformed and damaged, requiring regular inspection and maintenance. The small doors weigh over 100 kilograms, making manual disassembly and assembly extremely labor-intensive, inefficient, and unsafe. Currently, door-assisted installation is used, which does reduce labor intensity, but the disassembly and assembly are still difficult, time-consuming, and labor-intensive. Therefore, this application proposes a time-saving and labor-saving small door disassembly and assembly vehicle for train freight cars. Summary of the Invention
[0004] Therefore, the purpose of this utility model is to provide a vehicle for disassembling and assembling small doors of train freight cars to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the following technical solution is adopted:
[0006] The train freight car small door disassembly and assembly vehicle includes a forklift. The front of the forklift is equipped with a primary mast, a secondary mast, and forks. The forks are installed at the front of the secondary mast. The secondary mast is slidably installed inside the primary mast. A cantilever mechanism for suspending the small door is slidably installed inside the secondary mast.
[0007] The cantilever mechanism includes a three-stage gantry, the upper part of which extends beyond the upper part of the two-stage gantry. A hydraulic telescopic rod is vertically installed at the lower part of both ends of the top beam at the top of the three-stage gantry. The lower end of the hydraulic telescopic rod is fixedly installed on a fixed plate, and the fixed plate is fixedly welded to the outer walls on both sides of the first-stage gantry.
[0008] A crossbar is fixedly installed on the top beam of the three-level gantry. One end of the crossbar is horizontally hinged to one end of the support rod. A hydraulic winch is installed on the side wall of the other end of the support rod. A second hydraulic telescopic rod is rotatably installed on the side wall of the crossbar. The telescopic end of the second hydraulic telescopic rod is rotatably installed on the side wall of the support rod. The hydraulic winch is used to hoist the small door.
[0009] As a further improvement of this utility model, the hydraulic telescopic rod one, the hydraulic telescopic rod two, and the hydraulic winch are connected to the hydraulic system of the forklift.
[0010] As a further improvement of this utility model, guide grooves are provided on the two inner side walls of the secondary gantry, and two guide wheels are respectively installed on the two outer side walls of the tertiary gantry, with the guide wheels installed in the guide grooves.
[0011] As a further improvement of this utility model, a directional wheel is installed at the end of the support rod away from the crossbar, and a hook is installed at the end of the steel wire rope of the hydraulic winch after passing around the directional wheel.
[0012] The beneficial effects of this utility model are:
[0013] This utility model has a simple structure and ingenious design. The forks lift the stacked small doors off the bottom surface. The worker hangs the hook on the small door. The first hydraulic telescopic rod lifts the three-stage mast, suspending the small door in the air. The second hydraulic telescopic rod rotates the support rod to the side of the forklift, and the small door moves to the side of the forklift. The forklift moves and places the small door in the installation position in the truck bed. The worker can easily install it, saving time and effort, reducing the labor intensity of workers, and improving the efficiency of disassembly and assembly. Attached Figure Description
[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a diagram showing the connection structure between the connecting rod and the fixed shaft in this utility model.
[0017] Figure 3 This is a schematic diagram of the connection structure between the secondary and tertiary gantry in this utility model. Detailed Implementation
[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0020] Please refer to Figure 1-3The train freight car small door disassembly and assembly vehicle includes a forklift 1. The forklift 1 is equipped with a primary mast 2, a secondary mast 3 and forks 4 at the front. The forks 4 are installed at the front of the secondary mast 3. The secondary mast 3 is slidably installed inside the primary mast 2. The above equipment is existing equipment that is matched with the forklift 1. Based on the existing forklift 1, a cantilever mechanism 6 for cantilevering the small door 5 is slidably installed inside the secondary mast 3.
[0021] The cantilever mechanism 6 includes a third-level gantry 61, the upper part of which extends beyond the upper part of the second-level gantry 3. The lower ends of the top beam 62 at the top of the third-level gantry 61 are vertically installed with hydraulic telescopic rods 63. The lower ends of the hydraulic telescopic rods 63 are fixedly installed on the fixed plate 64. The fixed plate 64 is fixedly welded to the outer walls on both sides of the first-level gantry 2.
[0022] A crossbar 65 is fixedly installed on the top beam 62 at the top of the three-level mast 61. One end of the crossbar 65 is horizontally hinged to one end of the support rod 66. A hydraulic winch 67 is installed on the side wall of the other end of the support rod 66. A second hydraulic telescopic rod 68 is rotatably installed on the side wall of the crossbar 65. The telescopic end of the second hydraulic telescopic rod 68 is rotatably installed on the side wall of the support rod 66. The hydraulic winch 67 is used to lift the small door 5. The first hydraulic telescopic rod 63, the second hydraulic telescopic rod 68 and the hydraulic winch 67 are connected to the hydraulic system of the forklift 1.
[0023] Guide grooves 31 are provided on the two inner side walls of the secondary gantry 3, and two guide wheels 69 are respectively installed on the two outer side walls of the tertiary gantry 61. The guide wheels 69 roll and slide in the guide grooves 31. Through the cooperation of the guide wheels 69 and the guide grooves 31, the tertiary gantry 61 can slide on the secondary gantry 3.
[0024] A guide wheel 671 is installed at the end of the support rod 66 away from the crossbar 65, and a hook 673 is installed at the end of the wire rope 672 of the hydraulic winch 67 after passing around the guide wheel 671.
[0025] In use, the forks 4 lift the stacked small doors 5 off the bottom surface, the worker hangs the hook 673 on the small door 5, the hydraulic telescopic rod 1 63 lifts the three-stage mast 61, the small door 5 is suspended in the air, the hydraulic telescopic rod 2 68 works, rotates the support rod 66 to the side of the forklift 1, the small door 5 moves to the side of the forklift 1, the forklift 1 moves and places the small door 5 in the installation position of the truck body, and the worker can easily install it.
[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A small door removal and installation vehicle for railway freight cars, including a forklift, wherein a primary mast, a secondary mast, and forks are mounted on the front of the forklift, the forks are mounted on the front of the secondary mast, and the secondary mast is slidably mounted inside the primary mast, characterized in that, A cantilever mechanism for suspending the small door is slidably installed on the inner side of the secondary gantry; The cantilever mechanism includes a three-stage gantry, the upper part of which extends beyond the upper part of the two-stage gantry. A hydraulic telescopic rod is vertically installed at the lower part of both ends of the top beam at the top of the three-stage gantry. The lower end of the hydraulic telescopic rod is fixedly installed on a fixed plate, and the fixed plate is fixedly welded to the outer walls on both sides of the first-stage gantry. A crossbar is fixedly installed on the top beam of the three-level gantry. One end of the crossbar is horizontally hinged to one end of the support rod. A hydraulic winch is installed on the side wall of the other end of the support rod. A second hydraulic telescopic rod is rotatably installed on the side wall of the crossbar. The telescopic end of the second hydraulic telescopic rod is rotatably installed on the side wall of the support rod. The hydraulic winch is used to hoist the small door.
2. The train freight car door disassembly and assembly car according to claim 1, characterized in that, The hydraulic telescopic boom 1, hydraulic telescopic boom 2, and hydraulic winch are connected to the hydraulic system of the forklift.
3. The train freight car small door disassembly and assembly car according to claim 1, characterized in that, Guide grooves are provided on the two inner side walls of the secondary gantry, and two guide wheels are installed on the two outer side walls of the tertiary gantry. The guide wheels are installed in the guide grooves.
4. The train freight car door disassembly and assembly car according to claim 1, characterized in that, A guide wheel is installed at the end of the support rod away from the crossbar, and a hook is installed at the end of the steel wire rope of the hydraulic winch after passing over the guide wheel.