A self-resetting rotating ladder
By designing a self-resetting rotating ladder, the problem of easy damage to traditional fixed ladders is solved, achieving automatic reset and safety, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY CONSTR HEAVY IND
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional fixed ladders cannot be retracted automatically, resulting in low ground clearance for vehicles and making them prone to damage from bumps and knocks.
A self-resetting rotating ladder was designed, including a fixing component, a driving component, a climbing component, and a limiting component. The climbing component is driven to rotate by a gas spring to achieve automatic reset, and the limiting component ensures safety and smooth operation.
It achieves automatic reset of the ladder, avoids bumps and collisions, extends service life, and ensures safety and smooth operation.
Smart Images
Figure CN224579296U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ladder technology, specifically providing a self-resetting rotating ladder. Background Technology
[0002] The cabs of large construction machinery are generally high off the ground, and the driver can only access them via a ladder. Traditional ladders are usually fixed structures, installed directly under the vehicle's cab. These ladders cannot be automatically retracted, and their low position to the ground results in a small overall ground clearance for the vehicle. During operation, the ladders are easily bumped and damaged.
[0003] Based on the above, this utility model provides a self-resetting rotating ladder to solve the technical problems existing in the prior art. Utility Model Content
[0004] The purpose of this utility model is to provide a self-resetting rotating ladder, and the specific technical solution is as follows: A self-resetting rotating ladder includes a fixed component, a drive component, a ladder component, and a limiting component; the ladder component is rotatably connected to the fixed component; the drive component is connected between the fixed component and the ladder component and is used to drive the ladder component to rotate relative to the fixed component; the limiting component is disposed between the fixed component and the ladder component and is used to limit the movement of the ladder component.
[0005] Furthermore, the fixing assembly includes a flange plate, a connecting pipe, and a bushing. The flange plate is fixedly connected to the cab, the connecting pipe is fixedly connected to the flange plate, and the bushing is fixedly connected to the end of the connecting pipe away from the flange plate.
[0006] Furthermore, a copper sleeve is nested inside the bushing, and the copper sleeve is interference-fitted with the bushing.
[0007] Furthermore, a threaded hole is provided on the side wall of the bushing, and the threaded hole is provided through the bushing and the copper sleeve; a grease fitting is installed in the threaded hole.
[0008] Furthermore, the ladder assembly includes a downward spiral ladder, a bent tube, and auxiliary steps; The bent pipe includes a first pipe section, a bent pipe section and a second pipe section connected in series. The first pipe section is fixedly connected to the upper end of the lower spiral staircase, and the second pipe section is embedded in the copper sleeve and rotatably connected to the copper sleeve. The auxiliary pedal is located on the side of the upper end of the lower spiral staircase.
[0009] Furthermore, an auxiliary pedal limiting plate is provided at the end of the auxiliary pedal.
[0010] Furthermore, the ladder assembly also includes a connecting plate, the first end of which is connected to the second pipe segment, and the second end of which is connected to the drive assembly.
[0011] Furthermore, the drive assembly includes a gas spring, a gas spring mounting plate, and a gas spring seat; the gas spring mounting plate is fixedly connected to the connecting pipe, and the gas spring is positionably mounted on the gas spring mounting plate; the telescopic end of the gas spring is connected to the second end of the connecting plate through the gas spring seat.
[0012] Furthermore, the gas spring is provided in two sets, and the two sets of gas springs are symmetrically connected to the upper and lower sides of the connecting plate. The gas spring seat is fixedly connected to the connecting plate, and the telescopic end of the gas spring is provided with a ball joint structure. The ball joint head of the ball joint structure is threadedly connected to the gas spring seat.
[0013] Furthermore, the limiting component includes a first limiting component and a second limiting component; The first limiting component includes a limiting plate, which is fixed to the end of the second pipe section away from the bend section by bolts, and the outer diameter of the limiting plate is larger than the inner diameter of the bushing. The second limiting component includes an adjusting bolt and an adjusting nut. The adjusting bolt is threaded to the end of the connecting plate away from the second pipe section and is fixed by the adjusting nut. When the downward spiral staircase rotates to a vertical position, the adjusting bolt abuts against the connecting pipe.
[0014] The application of the technical solution of this utility model has the following beneficial effects: (1) This utility model provides a self-resetting rotating ladder, including a fixed component, a drive component, a ladder component, and a limiting component; the ladder component is rotatably connected to the fixed component; the drive component is connected between the fixed component and the ladder component, and is used to drive the ladder component to rotate relative to the fixed component; the limiting component is disposed between the fixed component and the ladder component, and is used to limit the ladder component. The self-resetting rotating ladder provided by this utility model can enable personnel to enter and exit the cab, and automatically reset by driving the ladder component to rotate relative to the fixed component through the drive component, ensuring the ground clearance of the ladder, avoiding ladder collisions during vehicle operation, reducing the probability of ladder damage, and extending the service life of the ladder.
[0015] (2) In this utility model, a threaded hole is provided on the side wall of the bushing, and the threaded hole is provided through the bushing and the copper sleeve; a grease nipple is installed in the threaded hole, and grease is injected through the grease nipple to achieve lubrication between the copper sleeve and the second pipe section, so as to ensure the smooth rotation of the second pipe section relative to the copper sleeve.
[0016] (3) In this utility model, the end of the auxiliary pedal is provided with an auxiliary pedal limiting plate to ensure the safety of personnel when stepping on it.
[0017] (4) In this utility model, the first limiting component includes a limiting plate and a bolt. The limiting plate is fixed to the end of the second pipe section away from the bend section by the bolt. The outer diameter of the limiting plate is larger than the inner diameter of the bushing. By setting the first limiting component, the bending pipe is limited, preventing the bending pipe from coming out of the bushing, and realizing the rotational connection between the lower spiral ladder and the fixed component.
[0018] (5) In this utility model, the second limiting component includes an adjusting bolt and an adjusting nut. The adjusting bolt is threaded to the end of the second end of the connecting plate. By adjusting the extension length of the adjusting bolt and fixing it with the adjusting nut, the adjusting bolt abuts against the connecting pipe when the lower spiral ladder is rotated into a vertical state, thereby limiting the rotation of the lower spiral ladder and ensuring the safety of personnel climbing the ladder.
[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0020] 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: Figure 1 This is a schematic diagram of the structure of the self-resetting rotating ladder in an embodiment of this utility model; Figure 2 This is a structural diagram of the fixed component; Figure 3 This is a structural diagram of the ladder assembly; Figure 4 It is a cross-sectional view of the connection between the bent pipe and the bushing; Figure 5 This is a schematic diagram of a spiral staircase in a vertical position; Figure 6 This is a schematic diagram of a spiral staircase in a horizontal position; Among them, 1. Fixing assembly, 1.1 Flange plate, 1.2 Connecting pipe, 1.3 Bushing, 2. Drive assembly, 2.1 Gas spring, 2.2 Gas spring mounting elbow, 2.3 Gas spring seat, 3. Climbing ladder assembly, 3.1 Lower spiral ladder, 3.2 Bending pipe, 3.3 Auxiliary pedal, 3.3.1 Auxiliary pedal limiting plate, 3.4 Connecting plate, 4. Limiting assembly, 4.1 First limiting assembly, 4.1.1 Limiting plate, 4.1.2 Bolt, 4.2 Second limiting assembly, 5. Grease nipple. Detailed Implementation
[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.
[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0024] Example See Figure 1 This embodiment provides a self-resetting rotating ladder, including a fixed component 1, a driving component 2, a ladder component 3, and a limiting component 4; the ladder component 3 is rotatably connected to the fixed component 1; the driving component 2 is connected between the fixed component 1 and the ladder component 3, and is used to drive the ladder component 3 to rotate relative to the fixed component 1; the limiting component 4 is disposed between the fixed component 1 and the ladder component 3, and is used to limit the ladder component 3.
[0025] See Figure 2 The fixing component 1 includes a flange plate 1.1, a connecting pipe 1.2, and a bushing 1.3. The flange plate 1.1 is fixedly connected to the bottom of the cab by bolts to realize the connection between the self-resetting rotating ladder and the cab. The connecting pipe 1.2 is preferably a square pipe, which is fixedly connected to the flange plate 1.1 (preferably welded in this embodiment). The bushing 1.3 is fixedly connected to the end of the connecting pipe 1.2 away from the flange plate 1.1 (preferably welded in this embodiment).
[0026] In this embodiment, the bushing 1.3 is a cylindrical hollow design, and a copper sleeve is nested inside the bushing 1.3. The copper sleeve and the bushing 1.3 are interference-fitted, so that the copper sleeve and the bushing 1.3 cannot rotate relative to each other.
[0027] See Figure 3 and Figure 4The ladder assembly 3 includes a lower spiral ladder 3.1, a bent pipe 3.2, and an auxiliary step 3.3. The bent pipe 3.2 includes a first pipe section, a bent pipe section, and a second pipe section connected in series. The first pipe section is fixedly connected to the upper end of the lower spiral ladder 3.1 (i.e., the end near the driver's cab), and the second pipe section is embedded in a copper sleeve and rotatably connected to the copper sleeve. A threaded hole is provided on the side wall of the bushing 1.3, and the threaded hole passes through the bushing 1.3 and the copper sleeve. A grease nipple 5 is installed in the threaded hole, and grease is injected through the grease nipple 5 to lubricate the copper sleeve and the second pipe section, ensuring the smooth rotation of the second pipe section relative to the copper sleeve.
[0028] See Figure 3 The auxiliary pedal 3.3 is located on the side of the upper end of the lower spiral staircase 3.1, and the end of the auxiliary pedal 3.3 is provided with an auxiliary pedal limiting plate 3.3.1 to ensure the safety of personnel when stepping on it.
[0029] See Figure 1 and Figure 3 In this embodiment, the ladder assembly 3 further includes a connecting plate 3.4, the first end of which is connected to the second pipe segment, and the second end of which is connected to the drive assembly 2.
[0030] See Figures 1-3 The drive assembly 2 includes a gas spring 2.1, a gas spring mounting plate 2.2, and a gas spring seat 2.3. The gas spring mounting plate 2.2 is fixedly connected to the connecting pipe 1.2. The gas spring 2.1 is positionably mounted on the gas spring mounting plate 2.2. Specifically, the gas spring mounting plate 2.2 has oblong holes on two opposite sides for mounting and adjusting the position of the gas spring 2.1. The telescopic end of the gas spring 2.1 is connected to the second end of the connecting plate 3.4 via the gas spring seat 2.3. In this embodiment, the gas spring seat 2.3 adopts a threaded rod, which is fixedly connected to the connecting plate 3.4. The telescopic end of the gas spring 2.1 is provided with a ball joint structure, and the ball joint head of the ball joint structure is provided with a threaded hole. The threaded rod is threadedly connected to the threaded hole.
[0031] See Figure 1 In this embodiment, two sets of gas springs 2.1 are provided, and the two sets of gas springs 2.1 are symmetrically connected to the upper and lower sides of the connecting plate 3.4.
[0032] As another preferred technical solution, the gas spring 2.1 can be replaced by a hydraulic cylinder or a pneumatic cylinder.
[0033] In this embodiment, the limiting component 4 includes a first limiting component 4.1 and a second limiting component 4.2; see also Figure 1 and Figure 4The first limiting component 4.1 includes a limiting plate 4.1.1 and a bolt 4.1.2. The limiting plate 4.1.1 is fixed to the end of the second pipe section away from the bend section by the bolt 4.1.2. The outer diameter of the limiting plate 4.1.1 is larger than the inner diameter of the bushing 1.3. By setting the first limiting component 4.1, the bending pipe 3.2 is limited, preventing the bending pipe 3.2 from coming out of the bushing 1.3, and realizing the rotational connection between the lower spiral ladder 3.1 and the fixed component 1.
[0034] See Figure 1 The second limiting component 4.2 includes an adjusting bolt and an adjusting nut. The adjusting bolt is threaded to the end of the second end of the connecting plate 3.4. By adjusting the extension length of the adjusting bolt and fixing it with the adjusting nut, the adjusting bolt abuts against the connecting pipe 1.2 when the lower spiral ladder 3.1 is rotated into a vertical state, thus limiting the rotation of the lower spiral ladder 3.1 and ensuring the safety of personnel climbing the ladder. When the adjusting bolt abuts against the connecting pipe 1.2, the gas spring 2.1 has a reserved stroke to avoid direct force on the gas spring 2.1, reduce manufacturing precision requirements, and extend the service life of the gas spring 2.1.
[0035] The initial state of the downward spiral staircase 3.1 is horizontal; see [link / reference]. Figure 6 When it is necessary to enter the cab via the ladder, the operator pulls the lower spiral ladder 3.1, the gas spring 2.1 retracts under force, and the lower spiral ladder 3.1 rotates around the bushing 1.3 to a vertical position, as shown. Figure 5 As shown, at this time, the end of the adjusting bolt abuts against the connecting pipe 1.2, thus limiting the lower spiral ladder 3.1. Stepping on the pedal on the lower spiral ladder 3.1 allows entry into the cab. After the person leaves the lower spiral ladder 3.1, the gas spring 2.1 automatically extends, and the lower spiral ladder 3.1 rotates around the bushing 1.3 to return to a horizontal position. Figure 6 As shown, the ladder achieves self-resetting.
[0036] When personnel need to leave the cab, they step on the auxiliary pedal 3.3 on the lower spiral staircase 3.1. The auxiliary pedal limit plate 3.3.1 ensures safety and provides convenient leverage when stepping on the pedal. Under the weight of the personnel, the gas spring 2.1 retracts, and the lower spiral staircase 3.1 rotates around the bushing 1.3 to a vertical position. Figure 5 As shown, stepping on the pedal on the lower spiral staircase 3.1 allows you to leave the cab; after you leave the lower spiral staircase 3.1, the gas spring 2.1 automatically extends, and the lower spiral staircase 3.1 rotates around the bushing 1.3 to return to a horizontal position, as shown. Figure 6 As shown, the ladder achieves self-resetting.
[0037] The self-resetting rotating ladder provided by this utility model can enable personnel to enter and exit the driver's cab and can automatically reset, ensuring the ladder's ground clearance, avoiding ladder collisions during vehicle operation, reducing the probability of ladder damage, and extending the ladder's service life.
[0038] 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 self-retracting rotary ladder, characterized by, It includes a fixed component (1), a drive component (2), a climbing component (3), and a limiting component (4); the climbing component (3) is rotatably connected to the fixed component (1); the drive component (2) is connected between the fixed component (1) and the climbing component (3) and is used to drive the climbing component (3) to rotate relative to the fixed component (1); the limiting component (4) is disposed between the fixed component (1) and the climbing component (3) and is used to limit the climbing component (3).
2. A self-retracting rotary ladder according to claim 1, wherein, The fixing component (1) includes a flange plate (1.1), a connecting pipe (1.2), and a bushing (1.3). The flange plate (1.1) is fixedly connected to the cab, the connecting pipe (1.2) is fixedly connected to the flange plate (1.1), and the bushing (1.3) is fixedly connected to the end of the connecting pipe (1.2) away from the flange plate (1.1).
3. A self-righting rotary ladder according to claim 2, wherein, A copper sleeve is nested inside the bushing (1.3), and the copper sleeve is interference-fitted with the bushing (1.3).
4. A self-retracting rotary ladder according to claim 3, wherein, The bushing (1.3) has a threaded hole on its side wall, which passes through the bushing (1.3) and the copper sleeve; a grease nipple (5) is installed in the threaded hole.
5. A self-retracting rotary ladder according to claim 3, wherein, The climbing ladder assembly (3) includes a downward spiral ladder (3.1), a bent tube (3.2), and an auxiliary step (3.3). The bent pipe (3.2) includes a first pipe section, a bent pipe section and a second pipe section connected in series. The first pipe section is fixedly connected to the upper end of the lower spiral staircase (3.1), and the second pipe section is embedded in the copper sleeve and rotatably connected to the copper sleeve. The auxiliary pedal (3.3) is located on the side of the upper end of the lower spiral staircase (3.1).
6. A self-retracting rotary ladder according to claim 5, wherein, The auxiliary pedal (3.3) is provided with an auxiliary pedal limiting plate (3.3.1) at its end.
7. A self-retracting rotary ladder according to claim 5, wherein, The ladder assembly (3) also includes a connecting plate (3.4), the first end of which is connected to the second pipe section, and the second end of which is connected to the drive assembly (2).
8. A self-righting rotary ladder according to claim 7, wherein, The drive assembly (2) includes a gas spring (2.1), a gas spring mounting plate (2.2), and a gas spring seat (2.3); the gas spring mounting plate (2.2) is fixedly connected to the connecting pipe (1.2), and the gas spring (2.1) is positionably mounted on the gas spring mounting plate (2.2); the telescopic end of the gas spring (2.1) is connected to the second end of the connecting plate (3.4) through the gas spring seat (2.3).
9. A self-resetting rotating ladder according to claim 8, characterized in that, The gas spring (2.1) is provided in two sets, and the two sets of gas springs (2.1) are symmetrically connected to the upper and lower sides of the connecting plate (3.4); The gas spring seat (2.3) is fixedly connected to the connecting plate (3.4), and the telescopic end of the gas spring (2.1) is provided with a ball joint structure. The ball joint head of the ball joint structure is threadedly connected to the gas spring seat (2.3).
10. A self-retracting rotary ladder according to any one of claims 7-9, characterized in that The limiting component (4) includes a first limiting component (4.1) and a second limiting component (4.2). The first limiting component (4.1) includes a limiting plate (4.1.1), which is fixed to the end of the second pipe section away from the bend section by bolts (4.1.2). The outer diameter of the limiting plate (4.1.1) is larger than the inner diameter of the bushing (1.3). The second limiting component (4.2) comprises an adjusting bolt and an adjusting nut, the adjusting bolt is threadedly connected to the end of the connecting plate (3.4) far from the one end of the second pipe segment and is fixed by the adjusting nut; when the lower spiral ladder (3.1) rotates to the vertical state, the adjusting bolt abuts against the connecting pipe (1.2).