Rotatable crawling ladder
By designing a rotatable ladder, the combination of fixed ladder and movable ladder and limit groove and limit pin structures are used to solve the problem of collision between construction vehicle ladder and obstacles, and the effect of avoiding damage and improving climbing efficiency is achieved.
Patent Information
- Application Number
- CN202422417364.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The ladders of existing engineering vehicles are prone to collision with obstacles during work, resulting in damage, and it is time-consuming and labor-intensive to frequently hold them up and lower them, making it inconvenient to frequently climb different heights.
A rotatable ladder is designed. Through a combination of a fixed ladder and a movable ladder, the movable ladder is movably connected to the fixed ladder through an installation shaft, and uses a limit groove and a limit pin to limit the rotation angle to avoid obstacles.
Effectively avoid collision between ladders and obstacles, reduce damage, improve climbing efficiency, and reduce the additional collision risk caused by inertial rotation.
Smart Images
Figure CN223256747U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of engineering machinery, and in particular to a rotatable ladder. Background Art
[0002] Engineering vehicles need to use ladders to climb, but the lowest position of the ladder is generally low. During the operation of the engineering vehicle, the ladder may collide with obstacles on the road such as waste piles on the road, which will damage the ladder and then damage the toolbox and other parts on the ladder. In the existing technology, the hanging part of the ladder is generally folded up to prevent the ladder from colliding with other obstacles when the mechanical equipment moves. However, engineering vehicles need to climb different heights frequently during operation, and frequent folding and putting away is time-consuming and labor-intensive, which is inconvenient to use. Utility Model Content
[0003] The purpose of this application is to provide a rotatable ladder, which avoids obstacles by providing a movable ladder. The fixed ladder is installed on the mechanical equipment. The movable ladder can rotate around the installation axis on the fixed ladder to avoid obstacles, reduce the collision between the ladder and the obstacles, and avoid damage to the ladder.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0005] The utility model provides a rotatable ladder, comprising a fixed ladder and a movable ladder, wherein the fixed ladder is mounted on a mechanical device, and the movable ladder is movably connected to the fixed ladder through a mounting shaft;
[0006] The movable ladder is provided with a limiting groove and a limiting pin, and the limiting groove and the limiting pin are used for limiting the rotation of the movable ladder with the installation axis as the center.
[0007] Optionally, a pin hole for installing a limit pin is provided on the fixed ladder, one end of the limit pin is connected to the pin hole, and the other end is extended to the limit groove.
[0008] Optionally, the limit groove includes a first arc-shaped limit groove and a second arc-shaped limit groove, the first arc-shaped limit groove and the limit pin are used for limiting the rotation of the movable ladder in the second area, and the second arc-shaped limit groove and the limit pin are used for the rotation of the movable ladder in the first area, the first area is the area of the movable ladder close to the mechanical direction, and the second area is the area away from the mechanical direction.
[0009] Optionally, the rotation angle of the movable ladder in the first area is 0-60°, and the rotation angle of the movable ladder in the second area is 0-70°.
[0010] Optionally, a first protrusion and a second protrusion are provided in the middle of the limit groove, the first protrusion is used to limit the limit pin from moving from the first arc-shaped limit groove to the second arc-shaped limit groove, and the second protrusion is used to limit the limit pin from moving from the second arc-shaped limit groove to the first arc-shaped limit groove. A gap is provided between the first protrusion and the second protrusion, and the limit pin switches between the first arc-shaped limit groove and the second arc-shaped limit groove through the gap.
[0011] Optionally, the fixed ladder includes a frame and multi-layered platforms, and both ends of the platforms are connected to the frame.
[0012] Optionally, the ladder platform is movably connected to a mounting plate, and the mounting plate is mounted on the mechanical equipment through a connecting piece.
[0013] Optionally, the movable ladder is provided with an oblong mounting hole, and the mounting shaft is arranged in the oblong mounting hole.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. The utility model installs the movable ladder on the fixed ladder through the installation shaft. The movable ladder can rotate around the installation shaft as the center of the circle. When the lower end of the movable ladder encounters an obstacle, the force exerted by the obstacle on the movable ladder can cause the movable ladder to rotate to a certain angle, thereby avoiding the obstacle. The movable ladder is limited to a rotation range by the limit pin and the limit slot to prevent the movable ladder from rotating too much and colliding with other equipment.
[0016] 2. The limit groove of the utility model is divided into two parts. The first arc-shaped limit groove limits the rotation angle of the movable ladder in the area close to the mechanical equipment, and the second arc-shaped limit groove limits the rotation angle of the movable ladder in the area away from the mechanical equipment. A protrusion and a gap are provided between the first arc-shaped limit groove and the second arc-shaped limit groove. The protrusion can limit the movable ladder from rotating back and forth due to inertia after avoiding obstacles. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of a rotatable ladder according to an embodiment of the present invention;
[0018] Figure 2 This is one of the schematic diagrams of the moving track of the limit pin in the limit groove according to one embodiment of the present utility model;
[0019] Figure 3 This is the second schematic diagram of the moving track of the limit pin in the limit groove of an embodiment of the utility model
[0020] Figure 4 This is a schematic diagram of a rotatable ladder in one embodiment of the utility model when used for climbing.
[0021] Figure 5This is a schematic diagram of the state of the movable ladder when the rotatable ladder of one embodiment of the utility model is subjected to a force in the direction B.
[0022] Figure 6 This is one of the schematic diagrams of the state of the movable ladder when the rotatable ladder of one embodiment of the utility model is subjected to a force in the direction C;
[0023] Figure 7 This is the second schematic diagram of the state of the movable ladder when the rotatable ladder of one embodiment of the utility model is subjected to a force in the C direction.
[0024] Description of reference numerals:
[0025] 1. Fixed ladder; 2. Movable ladder; 3. Mounting shaft; 4. Limit pin; 5. Limit groove; 501. First arc-shaped limit groove; 502. Second arc-shaped limit groove; 503. First protrusion; 504. Second protrusion; 505. Gap; 6. Oblong mounting hole; 7. Mounting plate; 8. Connector. DETAILED DESCRIPTION
[0026] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only some embodiments of the present application, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application, its application, or use.
[0027] Example 1
[0028] like Figure 1-Figure 7 As shown, this embodiment provides a rotatable ladder, including a fixed ladder 1 and a movable ladder 2. The fixed ladder 1 is installed on a mechanical device, and the movable ladder 2 is movably connected to the fixed ladder 1 through a mounting shaft 3; holes for the mounting shaft 3 are provided on both side panels of the fixed ladder 1, one end of the mounting shaft 3 is interference fit with the hole on the fixed ladder 1, and the other end is clearance fit with the hole on the movable ladder 2. Through the clearance fit of the mounting shaft 3 on the movable ladder 2, the movable ladder 2 can rotate around the mounting shaft 3.
[0029] When in use, the movable ladder 2 is located below the fixed ladder 1. When the movable ladder 2 contacts an obstacle on the road, the movable ladder 2 will be subjected to the force of the obstacle due to the clearance fit between the movable ladder 2 and the installation shaft 3, and then rotate around the installation shaft 3 at a certain angle. During the rotation, the position of the movable ladder 2 rises. After crossing the obstacle, the movable ladder 2 rotates to its original position due to the action of gravity.
[0030] The movable ladder 2 is provided with a limiting groove 5 and a limiting pin 4, which are used to limit the rotation of the movable ladder 2 about the mounting shaft 3. The limiting pin 4 can limit the maximum rotation angle of the movable ladder 2, preventing the movable ladder 2 from colliding with mechanical equipment when rotating toward the mechanical equipment area, or colliding with the connection end of the fixed ladder 1 and the step of the fixed ladder 1 when rotating away from the mechanical equipment.
[0031] Example 2
[0032] This embodiment provides a rotatable ladder based on Example 1. This embodiment differs from Example 1 in that: the fixed ladder 1 is provided with a pin hole, within which is a stop pin 4, with one end of the stop pin 4 extending into the stop slot 5. One end of the stop pin 4 has an interference fit with the pin hole in the fixed ladder 1, while the other end is disposed within the stop slot 5 of the movable ladder 2. When the movable ladder 2 is rotated toward a certain angle, the stop pin 4 and the stop slot 5 prevent it from continuing to rotate toward that area.
[0033] The limiting groove 5 is semicircular in shape, and is divided into two arc grooves by a first protrusion 503 and a second protrusion 504 provided in the middle. The first protrusion 503 is at the upper part of the limiting groove 5, and the second protrusion 504 is at the lower part of the limiting groove 5. The first protrusion 503 and the second protrusion 504 are staggered, and there is a gap 505 between the first protrusion 503 and the second protrusion 504. The gap 505 connects the two arc grooves of the limiting groove 5.
[0034] The two arc-shaped grooves are respectively the first arc-shaped limit groove 501 and the first arc-shaped limit groove 502. When the limit pin 4 is set in the first arc-shaped limit groove 501, the rotation angle of the movable ladder 2 in the second area is limited. The second area refers to the area where the movable ladder 2 is away from the direction of the mechanical equipment. When the limit pin 4 is set in the second arc-shaped limit groove 502, the rotation angle of the movable ladder 2 in the first area is limited. The first area refers to the area where the movable ladder 2 is close to the direction of the mechanical equipment.
[0035] The first protrusion 503 and the second protrusion 504 can limit the back and forth rotation of the stepladder 2 due to inertia after avoiding an obstacle. The back and forth rotation of the stepladder 2 in the first area is limited by the second protrusion 504 and will not pass through the gap 505 to reach the second area.
[0036] When the movable ladder 2 rotates in the first area, the maximum rotation angle is 60°, which prevents the movable ladder 2 from colliding with mechanical equipment and limits the rotation of the movable ladder 2. The movable ladder 2 can only rotate within the first area, which can reduce the rotation area of the movable ladder 2 due to inertia after being pushed by an obstacle.
[0037] When the movable ladder 2 rotates in the second area, the maximum rotation angle is 70°, which prevents the end of the movable ladder 2 connected to the fixed ladder 1 from colliding with the step on the fixed ladder 1. The rotation of the movable ladder 2 is limited, and the movable ladder 2 can only rotate within the second area, which can reduce the rotation area of the movable ladder 2 due to inertia after being pushed by an obstacle.
[0038] The fixed ladder 1 includes a frame and multi-layered platforms. Both ends of the platforms are connected to the frame. A mounting plate 7 is provided on the platform. The mounting plate 7 is connected to the side of the platform through a hinge. The mounting plate 7 can rotate around the fixed edge of the mounting plate 7. The mounting plate 7 is connected to the mechanical equipment through a connecting piece 8. When used on different mechanical equipment, the angle between the mounting plate 7 and the platform can be flexibly adjusted to adapt to the installation surface on the mechanical equipment. At the same time, the frames on both sides of the fixed ladder can also be detachably fixed to the mechanical equipment to ensure the stability of the fixed ladder 1.
[0039] like Figure 2-Figure 3 As shown, the outer great circle of the mounting shaft 3 is the relative motion trajectory of the limit pin 4. The mounting shaft 3 is arranged in the oblong mounting hole 6 on the movable ladder 2, and is clearance-matched with the oblong mounting hole 6. The movable ladder 2 rotates in different areas. When the movable ladder 2 rotates in the first area, the limit pin 4 is located in the second arc-shaped limit groove 502, and the mounting shaft 3 is located at the lower end of the oblong mounting hole 6. When the movable ladder 2 rotates in the second area, the limit pin 4 is located in the first arc-shaped limit groove 501, and the mounting shaft 3 is located at the upper end of the oblong mounting hole 6.
[0040] like Figure 4 As shown, when using the movable ladder 2 for climbing, the movable ladder 2 is subjected to a force in the direction A, and the limiting pin 4 is located in the gap 505 in the middle of the limiting groove 5. The first protrusion 503 limits the movable ladder 2 from moving to the first area, thereby ensuring the stability of the ladder.
[0041] like Figure 5 As shown, when the movable ladder 2 is subjected to a force in the direction B, the movable ladder 2 rotates in the second direction. Since the limiting pin 4 is restricted in the first arc-shaped limiting groove 501, the maximum rotation angle of the movable ladder 2 in the second area is 70°.
[0042] like Figure 6-Figure 7 As shown, when the movable ladder 2 is subjected to a force in the direction C, the movable ladder 2 will move upward. The mounting shaft 3 is now at the lower end of the oblong mounting hole 6, and the limit pin 4 passes through the gap 505 into the first arc-shaped limit groove 502. The movable ladder 2 then rotates in the first area. Since the limit pin 4 is restricted in the second arc-shaped limit groove 502, the maximum rotation angle in the first area is 60°.
[0043] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A rotatable ladder, characterized in that: It includes a fixed ladder and a movable ladder, wherein the fixed ladder is installed on the mechanical equipment, and the movable ladder is movably connected to the fixed ladder through a mounting shaft; The movable ladder is provided with a limiting groove and a limiting pin, and the limiting groove and the limiting pin are used for limiting the rotation of the movable ladder with the installation axis as the center.
2. The rotatable ladder according to claim 1, characterized in that: The fixed ladder is provided with a pin hole for installing a limit pin, one end of the limit pin is connected to the pin hole, and the other end is extended to the limit slot.
3. The rotatable ladder according to claim 1, characterized in that: The limiting groove includes a first arc-shaped limiting groove and a second arc-shaped limiting groove. The first arc-shaped limiting groove and the limiting pin are used for limiting the rotation of the movable ladder in the second area. The second arc-shaped limiting groove and the limiting pin are used for rotating the movable ladder in the first area. The first area is the area of the movable ladder close to the mechanical direction, and the second area is the area away from the mechanical direction.
4. The rotatable ladder according to claim 3, characterized in that: The rotation angle of the movable ladder in the first area is 0-60 degrees, and the rotation angle of the movable ladder in the second area is 0-70 degrees.
5. The rotatable ladder according to claim 3, characterized in that: A first protrusion and a second protrusion are provided in the middle of the limit groove, the first protrusion is used to limit the limit pin from moving from the first arc-shaped limit groove to the second arc-shaped limit groove, and the second protrusion is used to limit the limit pin from moving from the second arc-shaped limit groove to the first arc-shaped limit groove. A gap is provided between the first protrusion and the second protrusion, and the limit pin switches between the first arc-shaped limit groove and the second arc-shaped limit groove through the gap.
6. The rotatable ladder according to claim 1, characterized in that: The fixed ladder comprises a frame and multi-layered platforms, and both ends of the platforms are connected to the frame.
7. The rotatable ladder according to claim 6, characterized in that: The ladder platform is movably connected to a mounting plate, and the mounting plate is mounted on the mechanical equipment through a connecting piece.
8. The rotatable ladder according to claim 1, characterized in that: The movable ladder is provided with an oblong mounting hole, and the mounting shaft is arranged in the oblong mounting hole.