Rotatable and foldable top climbing ladder
By designing a rotatable and foldable ladder, and using pull pins and latches for connection, the problem of insufficient space at the front and rear of railway locomotives was solved, enabling easy operation and safe use of the ladder, adapting to confined spaces, and improving work efficiency.
Patent Information
- Application Number
- CN202520264685.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-19
AI Technical Summary
The lack of space at the front and rear of existing railway locomotives or large vehicles makes it impossible to install traditional ladders, increasing the risk and difficulty of maintenance or inspection. In addition, existing foldable or retractable designs are complex and inconvenient to operate.
Design a rotatable and foldable ladder to the top. Through the combination of the upper ladder, lower ladder and middle fixing part, the ladder can be folded and unfolded by using pull pins and latches. The middle fixing part is rotated and locked to the vehicle wall panel, which can be adapted to the arrangement of narrow spaces.
It enables flexible layout in confined spaces, simplifies operating procedures, and improves safety and work efficiency.
Smart Images
Figure CN223754005U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of railway locomotive auxiliary equipment technology, specifically to a rotatable and foldable ladder for climbing. Background Technology
[0002] In the design of railway locomotives or other large vehicles, access ladders are crucial passageways for maintenance or operating personnel to access the vehicles. However, due to railway vehicle clearance requirements, especially at the front and rear of the vehicles, there is often insufficient space to securely install traditional access ladders. This forces operators to use unsafe or inconvenient methods to access the vehicles during maintenance or inspection in these areas, increasing operational risks and difficulties.
[0003] While some existing technologies offer foldable or extendable ladder designs, these designs are often structurally complex, inconvenient to operate, and difficult to adapt to the need for flexible placement in confined spaces. Therefore, developing a ladder that is both space-saving and easy to operate and maintain is of paramount importance. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides a rotatable and foldable ladder for climbing, which has a compact structure, is easy to operate, and can be adapted to the arrangement of narrow spaces, so as to solve the problem that climbing ladders cannot be arranged at the front and rear of vehicles due to space limitations.
[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:
[0006] A rotatable and foldable climbing ladder includes an upper ladder, a lower ladder, and an intermediate fixing component. The upper ladder includes an upper ladder column, a first ladder column fixing component, and a first support fixing component. The bottom of the upper ladder column is provided with several lower support components, which are perpendicular to the upper ladder column. The first ladder column fixing components are symmetrically arranged on both sides of the upper ladder column, and the first support fixing components are symmetrically arranged at the lower part of the upper ladder column. The first support fixing component has a first pin mounting hole.
[0007] The lower ladder includes a lower ladder column, a second ladder column fixing component, and a second support leg fixing component. The second ladder column fixing component is symmetrically arranged on both sides of the lower ladder column. The first ladder column fixing component and the second ladder column fixing component are connected by a pull pin. The second support leg fixing component has a second pin mounting hole. The first support leg fixing component and the second support leg fixing component are connected by a pin.
[0008] The intermediate fixing component includes a fixing rod and several side support components. The fixing rod is connected to the upper ladder column, and one end of each side support component is fixedly connected to the fixing rod, while the other end is fixedly connected to the vehicle wall panel.
[0009] In one embodiment, the upper ladder columns are formed by bending seamless steel pipes, and a plurality of upper steps are arranged between the upper ladder columns, and a plurality of lower steps are arranged between the lower ladder columns.
[0010] In one embodiment, the upper ladder column is provided with a first connecting piece and a second connecting piece arranged at the upper portion and the lower portion of the upper ladder column respectively; one end of the fixed rod is connected with the first connecting piece through a pin shaft assembly, and the other end is connected with the second connecting piece through the pin shaft assembly.
[0011] In one embodiment, the pin shaft assembly comprises a pin shaft and a shaft sleeve for fixing the pin shaft, and the pin shaft passes through corresponding holes of the first connecting piece and the fixed rod or passes through corresponding holes of the second connecting piece and the fixed rod to fix the upper ladder column.
[0012] In one embodiment, the lower support is provided with two, which are arranged at the two sides of the bottom of the upper ladder column respectively.
[0013] In one embodiment, the side support is provided with two, which are arranged at the two sides of the fixed rod respectively, and the side support is fixedly connected with the vehicle wall plate in a screwing mode, and the side support is fixedly connected with the fixed rod in a welding mode.
[0014] In one embodiment, the fixed rod is made of seamless steel pipe.
[0015] The utility model discloses a rotatable folding top climbing ladder, which comprises an upper ladder, a lower ladder and an intermediate fixing piece, wherein the upper ladder comprises upper ladder columns, a first ladder column fixing piece and a first supporting leg fixing piece, the lower ladder comprises lower ladder columns, a second ladder column fixing piece and a second supporting leg fixing piece, the first ladder column fixing piece and the second ladder column fixing piece are connected through a draw pin, and the first supporting leg fixing piece and the second supporting leg fixing piece are connected through a bolt to realize the folding and unfolding functions of the upper ladder and the lower ladder; the intermediate fixing piece comprises a fixed rod and a plurality of side supports, one end of the fixed rod is connected with a first connecting piece through a pin shaft assembly, and the other end is connected with a second connecting piece through a pin shaft assembly to realize the left and right rotation and locking functions of the upper ladder. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.
[0017] Figure 1 The structural schematic diagram of the top climbing ladder is shown in the present application.
[0018] Figure 2 The structural schematic diagram of the top climbing ladder is shown in the present application.
[0019] Figure 3 The structural schematic diagram of the top climbing ladder is shown in the present application.
[0020] Figure 4 The structural schematic diagram of the top climbing ladder is shown in the present application.
[0021] The drawings are as follows: 1, top ladder column; 11, top pedal; 12, first connecting piece; 13, second connecting piece; 2, first ladder column fixing piece; 3, first supporting leg fixing piece; 4, lower supporting piece; 5, lower ladder column; 51, lower pedal; 6, second ladder column fixing piece; 7, second supporting leg fixing piece; 8, fixed rod; 9, side supporting piece; 10, pin shaft assembly. DETAILED DESCRIPTION
[0022] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0023] In addition, the terms "first", "second", and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0024] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation" "connection" should be understood in a broad sense, for example, it can be fixed connection, can also be detachable connection, or integral connection: can be mechanical connection, can also be electrical connection: can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood through specific circumstances.
[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.
[0026] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 A rotatable folding top climbing ladder, comprising an upper ladder, a lower ladder and an intermediate fixing part, wherein the upper ladder comprises an upper ladder column 1, a first ladder column fixing part 2 and a first supporting leg fixing part 3. The upper ladder column 1 is bent and formed by high-strength seamless steel pipe, which ensures the structural strength and stability of the ladder. A plurality of upper steps 11 are evenly arranged between the upper ladder columns 1, the upper steps 11 are punched and protrude from the upper surface, which plays a role in weight reduction and anti-skid, and provides a stable stepping surface for the operator. The number of upper steps 11 can be adjusted according to actual needs, and in the embodiment, four upper steps 11 are preferably used.
[0027] The bottom of the upper ladder column 1 is provided with two lower supporting parts 4, which are arranged on both sides of the bottom of the upper ladder column 1. The two lower supporting parts 4 are arranged perpendicularly to the upper ladder column 1. When the top climbing ladder is rotated to the use position, the lower supporting parts 4 can be abutted against the vehicle wall panel, effectively preventing the ladder from shaking left and right during use, and improving the safety of use.
[0028] The first ladder column fixing part 2 is symmetrically arranged on both sides of the upper ladder column 1 and is used to be connected with the second ladder column fixing part 6 of the lower ladder through a draw pin. The first supporting leg fixing part 3 is also symmetrically arranged on the lower part of the upper ladder column 1, and a first pin mounting hole is formed in the first supporting leg fixing part 3, which is used to be connected with the second supporting leg fixing part 7 of the lower ladder through a bayonet, so as to realize the up-down overturning function of the lower ladder.
[0029] In addition, the upper ladder column 1 is also provided with a first connecting part 12 and a second connecting part 13, which are arranged on the upper part and the lower part of the upper ladder column 1 and are connected with the fixing rod 8 of the intermediate fixing part through a pin shaft, so as to realize the rotating function of the upper ladder.
[0030] The lower ladder comprises lower ladder columns 5, second ladder column fixing members 6 and second supporting leg fixing members 7. A plurality of lower steps 51 are evenly arranged between the lower ladder columns 5, and the lower steps 51 are punched and protrude from the upper surface to reduce weight and prevent slipping. When the lower ladder is flipped upwards, the lower surface of the lower ladder steps is flush with the upper surface of the upper ladder steps to provide a stable stepping surface for the operator. The number of the lower steps 51 is preferably four.
[0031] The second ladder column fixing members 6 are symmetrically arranged on both sides of the lower ladder columns 5, and the first ladder column fixing members 2 and the second ladder column fixing members 6 are connected by cooperating with the draw pin. The second supporting leg fixing members 7 are provided with second pin mounting holes, and the first supporting leg fixing members 3 and the second supporting leg fixing members 7 are connected by cooperating with the plug pin to realize the folding and unfolding functions of the upper ladder and the lower ladder.
[0032] The intermediate fixing member comprises a fixing rod 8 and a plurality of side supporting members 9, and the fixing rod 8 is made of a seamless steel pipe. One end of the fixing rod 8 is connected with the first connecting member 12 through the pin shaft assembly 10, and the other end is connected with the second connecting member 13 through the pin shaft assembly 10 to realize the rotating and locking functions of the left and right of the upper ladder. One end of the side supporting member 9 is connected with the fixing rod 8 in a welding manner to ensure the firmness and stability of the structure, and the other end is connected with the vehicle wall plate in a screwing manner for convenient installation and disassembly. The number of the side supporting members 9 can be adjusted according to actual needs, and the number is preferably two in the embodiment, which are arranged on both sides of the fixing rod 8.
[0033] The pin shaft assembly 10 comprises a pin shaft and a shaft sleeve for fixing the pin shaft to realize the rotating and locking functions of the upper ladder. The pin shaft passes through the corresponding holes of the first connecting member 12 and the fixing rod 8 or passes through the corresponding holes of the second connecting member 13 and the fixing rod 8 to fix the upper ladder column 1. In order to ensure the safety in use, a safety locking device can also be arranged on the pin shaft assembly 10, the draw pin and the plug pin to prevent accidental unlocking during use.
[0034] In use, the top climbing ladder is screwed with the front wall or the rear wall edge of the vehicle through the side supports of the intermediate fixing member. The operator first pulls out the pin of the pin shaft assembly 10 to release the locking state of the top climbing ladder, rotates the lower edge of the upper ladder column 1 to the required position, ensures that the lower supporting member 4 is dead on the wall plate, and then puts back the plug pin of the pin shaft assembly 10 to lock the top climbing ladder to prevent the top climbing ladder from shaking left and right during use. Then, the operator pulls out the draw pin between the first ladder column fixing member 2 and the second ladder column fixing member 6 to put down the lower ladder. After use, the lower ladder is rotated upwards by 180°, the draw pin between the first ladder column fixing member 2 and the second ladder column fixing member 6 is put back to lock the lower ladder, then the plug pin of the pin shaft assembly 10 is released, and the top climbing ladder is rotated back to the initial position to complete a work.
[0035] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can also be implemented in other manners, and any obvious replacement without departing from the technical scheme concept is within the scope of the present application patent.
[0036] In order for those skilled in the art to more conveniently understand the improvements of the present application over the prior art, some drawings and descriptions of the present application have been simplified, and in order to be clear, some other elements are also omitted in the present application file, and those skilled in the art should realize that these omitted elements can also constitute the content of the present application.
Claims
1. A rotatable foldable roof ladder, characterized in that, The ladder includes an upper ladder, a lower ladder and an intermediate fixing part, the upper ladder includes an upper ladder column (1), a first ladder column fixing part (2) and a first foot fixing part (3), the bottom of the upper ladder column (1) is provided with a plurality of lower supporting parts (4), the lower supporting parts (4) are arranged vertically with the upper ladder column (1); the first ladder column fixing part (2) is symmetrically arranged on both sides of the upper ladder column (1), the first foot fixing part (3) is symmetrically arranged on the lower part of the upper ladder column (1), a first pin mounting hole is formed in the first foot fixing part (3); The lower ladder includes a lower ladder column (5), a second ladder column fixing part (6) and a second foot fixing part (7), the second ladder column fixing part (6) is symmetrically arranged on both sides of the lower ladder column (5), the first ladder column fixing part (2) and the second ladder column fixing part (6) are connected through a draw pin; a second pin mounting hole is formed in the second foot fixing part (7), the first foot fixing part (3) and the second foot fixing part (7) are connected through a bolt; The intermediate fixing part includes a fixing rod (8) and a plurality of side supporting parts (9), the fixing rod (8) is connected with the upper ladder column (1), one end of the side supporting part (9) is fixedly connected with the fixing rod (8), and the other end is fixedly connected with a vehicle wall plate.
2. The rotatable foldable roof access ladder of claim 1, wherein, The upper ladder column (1) is formed by bending a seamless steel pipe, a plurality of upper steps (11) are arranged between the upper ladder columns (1), and a plurality of lower steps (51) are arranged between the lower ladder columns (5).
3. The rotatable foldable roof access ladder of claim 1, wherein, The upper ladder column (1) is provided with a first connecting piece (12) and a second connecting piece (13), which are arranged on the upper part and the lower part of the upper ladder column (1) respectively; one end of the fixing rod (8) is connected with the first connecting piece (12) through a pin shaft assembly (10), and the other end is connected with the second connecting piece (13) through the pin shaft assembly (10).
4. The rotatable foldable roof access ladder of claim 3, wherein, The pin shaft assembly (10) includes a pin shaft and a shaft sleeve for fixing the pin shaft, the pin shaft passes through corresponding holes on the first connecting piece (12) and the fixing rod (8) or passes through corresponding holes on the second connecting piece (13) and the fixing rod (8) to fix the upper ladder column (1).
5. The rotatable foldable roof access ladder of claim 1, wherein, The lower supporting parts (4) are provided with two, which are arranged on both sides of the bottom of the upper ladder column (1).
6. The rotatable foldable roof access ladder of claim 1, wherein, The side supporting parts (9) are provided with two, which are arranged on both sides of the fixing rod (8), the side supporting parts (9) are fixedly connected with the vehicle wall plate in a screwing mode, and the side supporting parts (9) are fixedly connected with the fixing rod (8) in a welding mode.
7. The rotatable foldable roof access ladder of claim 1, wherein, The fixing rod (8) is made of a seamless steel pipe.