A ladder arm protection device for a ladder truck
By designing the ladder arm protection device of the ladder arm, the combination of support and L-shaped support plates is used to solve the problem of excessive stress on the ladder arm and the window contact part, reducing the risk of deformation and damage, and effectively protecting the ladder arm and windows.
Patent Information
- Application Number
- CN202421385365.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-18
AI Technical Summary
When existing ladder trucks transport construction materials, the contact area between the ladder arm and the window or balcony is too strong, which can easily lead to deformation or wear of the ladder arm and cannot effectively protect the window sill.
A ladder arm protection device is designed, including a detachable support member and an L-shaped support plate. The right-angle inner side of the support plate can be stuck on the outside of the window sill, increasing the contact area with the window, forming face-to-face contact, and reducing stress concentration.
By increasing the contact area between the ladder arm and the window, the local stress on the ladder arm and the window sill is reduced, the risk of deformation and damage is reduced, and the ladder arm and window are effectively protected.
Smart Images
Figure CN222716833U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aerial ladder vehicles, in particular to a ladder arm protection device for aerial ladder vehicles. Background Art
[0002] A ladder truck is a special vehicle equipped with a retractable ladder arm, which is used to lift personnel and materials during aerial operations and is widely used in the field of construction.
[0003] In the prior art, when transporting building materials to a high place, the ladder arm is generally extended to the specified height of the building, and then the end of the ladder arm is placed on the window or balcony of the building. The contact position between the ladder arm and the window or balcony is generally line contact, and the contact surface is small. Since the transported building materials are heavy, the contact part between the ladder arm and the window or balcony is subjected to greater force, which can easily cause deformation or wear of the ladder arm, and also cause the right-angle part where the window sill contacts the ladder arm to be bumped and fall off, and the ladder arm and the window cannot be protected. Utility Model Content
[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a ladder arm protection device for a ladder truck.
[0005] The technical solution of this utility model is as follows:
[0006] A ladder arm protection device for a ladder truck is arranged below the end of the ladder arm, and comprises a support member detachably connected to the lower end surface of the ladder arm, wherein the length direction of the support member is consistent with the width direction of the ladder arm, and an L-shaped support plate is arranged below the support member along the length direction thereof;
[0007] The L-shaped support plate has a right-angle inner side surface, which is arranged away from the ladder arm. The side of the L-shaped support plate away from the right-angle inner side surface is rotatably connected to the support member through a rotating shaft, and the axis of the rotating shaft is consistent with the length direction of the support member;
[0008] An arc groove is provided on one side of the support member close to the L-shaped support plate along the length direction. The L-shaped support plate is provided with a cylinder rotatably matched with the arc groove. The rotating shaft is arranged at both ends of the cylinder, and its axis is coaxial with the axis of the cylinder.
[0009] The support member is used to connect the ladder arm and the L-shaped support plate. The L-shaped support plate is rotatably arranged under the support member. The right-angled inner side surface of the support member is away from the ladder arm. When the ladder arm reaches the window sill at a specified height, the right-angled inner side surface can be stuck on the outer side of the window sill. The outer side of the window sill is a right-angled window sill. The right-angled inner side surface is adapted to the right-angled window sill, thereby increasing the contact area between the L-shaped support plate and the window, forming surface-to-surface contact, reducing the force concentration on the ladder arm and the window sill, and causing deformation and damage to the ladder arm and the window sill.
[0010] Regarding the specific structure of the support member, the support member includes a support plate and clamping plates movably connected at both ends of the support plate. The length direction of the support plate is consistent with the width direction of the ladder arm, and the two clamping plates can be clamped on both sides of the ladder arm along the width direction. The support plate is clamped and installed under the ladder arm through the two clamping plates, which is convenient for disassembly and quick installation of the support member.
[0011] The specific structure of the clamping plate clamped on the ladder arm is that one of the clamping plates is elastically connected to the support plate via an elastic member, and the expansion and contraction direction of the elastic member is consistent with the length direction of the support plate.
[0012] Regarding the specific structure of the support plate, the cross-section of the support plate is a trapezoidal surface, which has an upper bottom surface and is arranged close to the L-shaped support plate. An arc groove is opened on the upper bottom surface, and the lower bottom surface of the support plate contacts the lower surface of the ladder arm, which can increase the contact area between the ladder arm and the support member and play the effect of dispersing the force of the ladder arm.
[0013] The specific structure of the above-mentioned arc groove is that the central angle of the arc groove is greater than π / 2, the arc groove is a major arc, the central angle is greater than 180°, and the cylinder is rotatably arranged in the arc groove, which can rotate in the arc groove and will not separate from the support plate in the radial direction.
[0014] The length of the upper end surface of the window sill is generally short. In order to avoid the phenomenon that the short board is longer than the upper end surface of the window sill and cannot be stuck on the upper end surface of the window sill, an L-shaped support plate is set up including a long plate and a short plate vertically connected. The short plate is set close to the end of the ladder arm and contacts the upper end surface of the window sill.
[0015] The length range of the long board and the short board is such that the ratio of the length of the long board to the length of the short board is 2-3.
[0016] Regarding the structure in which one of the clamping plates is elastically connected to the support plate, a sliding groove is provided on one side of the support plate close to the lower surface of the ladder arm, and its length direction is consistent with the length direction of the support plate. The elastic member is arranged in the sliding groove, and one end of the elastic member is connected to the lower part of the clamping plate.
[0017] The beneficial effects of the utility model are:
[0018] When using a ladder truck to transport materials, the ladder arm of the ladder truck is extended to a specified height, and then the end of the ladder arm is close to the window sill or balcony of the building. After the clamping plate connected to the elastic member is pulled apart to a certain length, the support plate is installed under the ladder arm, and the right-angled inner side of the L-shaped support plate is aligned with the right-angled window sill of the window. The upper end of the ladder arm is lowered so that the L-shaped support plate is placed on the window sill, forming a surface contact between the ladder arm and the window, increasing the contact area, reducing the local force on the ladder arm and the window sill, and greatly reducing the deformation or bumping phenomenon at the contact position;
[0019] The L-shaped support plate is rotatably connected to the support member, and no matter the ladder arm is set up on the window sill or balcony at various angles, the right-angled inner side surface of the L-shaped support plate can be rotated to an angle corresponding to the right-angled window sill of the window sill;
[0020] The short board is in direct contact with the upper end of the right-angle windowsill of the window. The short board is short and will not be longer than the width of the upper end surface of the right-angle windowsill, thereby avoiding a gap between the short board and the upper end surface of the right-angle windowsill. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In the attached picture:
[0022] Figure 1 It is a structural schematic diagram;
[0023] Figure 2 It is a front view;
[0024] Figure 3 It is a cross-sectional view of the structure;
[0025] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;
[0026] Figure 5 It is a schematic diagram of the support plate and the L-shaped support plate structure;
[0027] The components represented by the reference numerals in the figure are:
[0028] 1. Ladder arm; 2. Support plate; 21. Upper bottom surface; 22. Arc groove; 23. Movable clamping plate; 24. Sliding groove; 3. Elastic member; 4. Cylinder; 5. Rotating shaft; 6. L-shaped support plate; 61. Long plate; 62. Short plate. DETAILED DESCRIPTION
[0029] See also Figure 1 and Figure 2 The protective device of the ladder arm 1 of a ladder truck shown in the figure is arranged below the end of the ladder arm 1, and includes a support member detachably connected to the lower end surface of the ladder arm 1, the length direction of the support member is consistent with the width direction of the ladder arm 1, and an L-shaped support plate 6 is arranged below the support member along its length direction.
[0030] The L-shaped support plate 6 includes a long plate 61 and a short plate 62 connected vertically, and the short plate 62 is arranged near the end of the ladder arm 1, and the short plate 62 contacts the upper end surface of the window sill. The L-shaped support plate 6 has a right-angle inner side surface, which is arranged away from the ladder arm 1, and the right-angle inner side surface is adapted to the right-angle window sill of the window, so that the long plate 61 and the short plate 62 can directly contact the two outer right-angle surfaces of the window, increase the contact area with the window, form a surface-to-surface contact, reduce the force concentration on the ladder arm 1 and the window sill, and reduce the deformation and damage of the ladder arm 1 and the window sill. The upper end surface of the window sill is generally short. In order to avoid the phenomenon that the short plate 62 is longer than the upper end surface of the window sill and cannot be stuck on the upper end surface of the window sill, the length range of the long plate 61 and the short plate 62 is that the ratio of the length of the long plate 61 to the length of the short plate 62 is 2-3.
[0031] See also Figure 1 and Figure 5 As shown, the side of the L-shaped support plate 6 away from the right-angle inner side surface is rotatably connected to the support member through the rotating shaft 5, and the axis of the rotating shaft 5 is consistent with the length direction of the support member. The support member is provided with an arc groove 22 along the length direction on the side close to the L-shaped support plate 6, and the L-shaped support plate 6 is provided with a cylinder 4 that rotatably cooperates with the arc groove 22. The rotating shaft 5 is arranged at both ends of the cylinder 4, and its axis is coaxial with the axis of the cylinder 4.
[0032] Regarding the specific structure of the support member, the support member includes a support plate 2 and clamping plates arranged at both ends of the support plate 2. The length direction of the support plate 2 is consistent with the width direction of the ladder arm 1, and the two clamping plates can be clamped on both sides of the ladder arm 1 along the width direction. The support plate 2 is clamped and installed under the ladder arm 1 through the two clamping plates, which is convenient for the disassembly and quick installation of the support member.
[0033] See also Figure 1 and Figure 5 As shown, regarding the specific structure of the support plate 2, the cross section of the support plate 2 is a trapezoidal surface, which has an upper bottom surface 21 and is arranged close to the L-shaped support plate 6. The arc groove 22 is opened on the upper bottom surface 21, and the lower bottom surface of the support plate 2 contacts the lower surface of the ladder arm 1, which can increase the contact area between the ladder arm 1 and the support member, and play the effect of dispersing the force of the ladder arm 1. The specific structure of the above-mentioned arc groove 22 is that the central angle of the arc groove 22 is greater than π / 2, the arc groove 22 is a major arc, and the central angle is greater than 180°. The cylinder 4 is rotatably arranged in the arc groove 22, which can rotate in the arc groove 22 and will not separate from the support plate 2 in the radial direction.
[0034] See also Figure 3 , Figure 4 and Figure 5As shown, the specific structure of the clamping plate clamped on the ladder arm 1 is that one of the clamping plates is elastically connected to the support plate 2 through an elastic member 3, the clamping plate connected to the elastic member 3 is a movable clamping plate 23, and the extension direction of the elastic member 3 is consistent with the length direction of the support plate 2. A sliding groove 24 is provided on one side of the lower surface of the support plate 2 close to the ladder arm 1, and its length direction is consistent with the length direction of the support plate 2. The elastic member 3 is arranged in the sliding groove 24, and one end of the elastic member 3 is connected to the lower part of the movable clamping plate 23. A slider is provided at the lower end of the movable clamping plate 23, and the slider is adapted to the sliding groove 24.
[0035] See also Figure 3 and Figure 4 As shown, the elastic member 3 of this embodiment is a tension spring. Before the two clamping plates are clamped on both sides of the ladder arm 1 along the width direction, the movable clamping plate 23 is pulled outward along the sliding groove 24 so that the distance between the two clamping plates is greater than the width of the ladder arm 1. Then, the two clamping plates are installed on both sides of the ladder arm 1, and the movable clamping plates 23 are released. The tension spring contracts and clamps the two clamping plates on both sides of the ladder arm 1, so that the support plate 2 can be installed under the ladder arm 1, thereby driving the L-shaped support plate 6 to be installed under the ladder arm 1.
Claims
1. A ladder arm protection device for a ladder truck, arranged below the end of a ladder arm (1), characterized in that: It comprises a support member detachably connected to the lower end surface of the ladder arm (1), the length direction of the support member is consistent with the width direction of the ladder arm (1), and an L-shaped support plate (6) is arranged below the support member along its length direction; The L-shaped support plate (6) has a right-angled inner side surface, which is arranged away from the ladder arm (1); the side of the L-shaped support plate (6) away from the right-angled inner side surface is rotatably connected to the support member via a rotating shaft (5); the axis of the rotating shaft (5) is consistent with the length direction of the support member; The support member is provided with an arc-shaped groove (22) along the length direction on one side close to the L-shaped support plate (6); the L-shaped support plate (6) is provided with a cylinder (4) rotatably matched with the arc-shaped groove (22); the rotating shaft (5) is arranged at both ends of the cylinder (4), and its axis is coaxial with the axis of the cylinder (4).
2. A ladder arm protection device for a ladder truck according to claim 1, characterized in that: The support member comprises a support plate (2) and clamping plates movably connected to both ends of the support plate (2); the length direction of the support plate (2) is consistent with the width direction of the ladder arm (1), and the two clamping plates can be clamped on both sides of the ladder arm (1) along the width direction.
3. A ladder arm protection device for a ladder truck according to claim 2, characterized in that: One of the clamping plates is elastically connected to the support plate (2) via an elastic member (3), and the expansion and contraction direction of the elastic member (3) is consistent with the length direction of the support plate (2).
4. A ladder arm protection device for a ladder truck according to claim 2, characterized in that: The cross section of the support plate (2) is a trapezoidal surface, which has an upper bottom surface (21) and is arranged close to the L-shaped support plate (6), and the arc-shaped groove (22) is opened on the upper bottom surface (21).
5. A ladder arm protection device for a ladder truck according to claim 1 or 4, characterized in that: The central angle of the arc-shaped groove (22) is greater than π / 2.
6. A ladder arm protection device for a ladder truck according to claim 1, characterized in that: The L-shaped support plate (6) comprises a long plate (61) and a short plate (62) which are vertically connected, and the short plate (62) is arranged close to the end of the ladder arm (1).
7. A ladder arm protection device for a ladder truck according to claim 6, characterized in that: The ratio of the length of the long plate (61) to the length of the short plate (62) is 2-3.
8. The ladder arm protection device of a ladder truck according to claim 3, characterized in that: The support plate (2) is provided with a sliding groove (24) on one side of the lower surface of the ladder arm (1), and its length direction is consistent with the length direction of the support plate (2). The elastic member (3) is arranged in the sliding groove (24), and one end of the elastic member (3) is connected to the lower part of the clamping plate.