Hanging ladder stand in side door of power van

Abstract

The invention discloses a power van side door inner hooking crawling ladder, the top of the crawling ladder is provided with a hanging piece, and the position, close to the inner side of the bottom, of the crawling ladder is provided with a limiting mechanism; the limiting mechanism is composed of a connecting assembly, a bearing piece and a mounting base. One end of the bearing part is fixedly arranged on the inner side of the bottom of the crawling ladder, and the other end extends towards the middle of the crawling ladder; the connecting assembly comprises a connecting rod and a limiting part; wherein the connecting rod is connected with the other end of the bearing piece in a penetrating mode, the limiting part is arranged at the end, facing the installation base, of the connecting rod, and the limiting part synchronously rotates along with the connecting rod and partially abuts against the bearing piece when rotating in the designated direction. According to the invention, the ladder stand is arranged in a way of hooking in the side door, the defect of occupying the space in the carriage is effectively avoided, the upper part of the ladder stand is accurately hooked on a specially-made hook seat on the side door, the lower part of the ladder stand is fixed by virtue of a limiting mechanism, and the whole structure is firm and durable and can bear the daily frequent use test.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of crawling ladders, and particularly relates to a crawling ladder hooked in the side door of a power vehicle. BACKGROUND

[0002] In the actual application scene of a power vehicle, the operation convenience of entering the vehicle cabin is crucial, and the design of the crawling ladder as a key auxiliary tool has many problems to be solved.

[0003] At present, the crawling ladders for entering the vehicle cabin of a power vehicle on the market have common installation modes such as in-box fixing, crawling ladder flipping and crawling ladder hole pulling.

[0004] The crawling ladder flipping type saves space to a certain extent, and the crawling ladder can be flipped upward and attached to the vehicle cabin wall when not in use. However, the flipping operation needs to be performed every time the crawling ladder is used, which is relatively cumbersome, especially in an emergency situation, which may delay the work progress due to untimely operation. Moreover, the flipping mechanism is prone to looseness and jamming after long-term use, further increasing the operation difficulty and time cost.

[0005] The crawling ladder hole pulling type hides the crawling ladder in a special hole slot at the bottom of the vehicle cabin, and the crawling ladder is pulled out for use. However, this design also has defects. The hole slot occupies a certain space at the bottom of the vehicle cabin, affecting the passability and stability of the vehicle. At the same time, a certain force and skill are required during the pulling process, and it is very difficult for people with less strength or less skilled operation to use the crawling ladder.

[0006] Overall, most of the existing crawling ladder design methods require additional space, and the crawling ladder operation is time-consuming, which is cumbersome and inefficient. Therefore, it is difficult to meet the needs of quick and convenient use of the power vehicle in different scenes, and innovation and optimization are urgently needed. SUMMARY

[0007] The present application aims to provide a crawling ladder hooked in the side door of a power vehicle to solve the problems of the crawling ladder generally using in-box fixing, crawling ladder flipping and crawling ladder hole pulling, most of which require additional space, and the crawling ladder operation is time-consuming, cumbersome and inefficient.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: a crawling ladder hooked in the side door of a power vehicle, the top of the crawling ladder is provided with a hooking piece, and the position adjacent to the inner side of the bottom of the crawling ladder is provided with a limiting mechanism; The limiting mechanism is composed of a connecting assembly, a bearing piece and a mounting seat. One end of the support member is fixed to the inner side of the bottom of the ladder, and the other end extends toward the middle of the ladder. The connecting assembly includes a connecting rod and a limiting part; The connecting rod is connected to the other end of the bearing member, and the limiting part is provided at the end of the connecting rod facing the mounting base. The limiting part rotates synchronously with the connecting rod and abuts against the bearing member when rotating in a specified direction. One end of the mounting base is movably sleeved on the connecting rod and abuts against the limiting part, while the other end of the mounting base is fixed to the side door.

[0009] As a preferred technical solution of the present invention, the ladder includes two parallel support frames and equidistant steps fixed inside the support frames. The supporting component is a connecting plate. One end of the connecting plate is fixed to the inside of the support frame by bolts, while the other end of the connecting plate has a round hole for the connecting components to pass through.

[0010] As a preferred technical solution of the present invention, the connecting rod includes a rotating part and a plugging part; The rotating part is located on one side of the connecting plate, and the end face of one end of the rotating part forms the rotating part. The diameter of the rotating part is larger than the diameter of the connecting rod. In use, the rotating part is mainly used to achieve the purpose of rotating the entire connecting rod. The plug-in part is located on the other side of the connecting plate. The plug-in part is integrally mounted on the rotating part. An arc groove is formed on the surface of the plug-in part, and the limiting part is located in the arc groove.

[0011] As a preferred technical solution of the present invention, the limiting part includes an irregularly shaped locking block and a torsion spring; The irregularly shaped card block is disposed in the arc groove, and the irregularly shaped card block has two inclined surfaces. The irregularly shaped card block abuts against the mounting base. The torsion spring is disposed between the irregularly shaped card block and the arc groove, and is located near one end of the irregularly shaped card block.

[0012] As a preferred technical solution of the present invention, the two inclined surfaces of the irregularly shaped card block are a top pressing surface and a side inclined surface formed on its top and one side, respectively; the top pressing surface and the side inclined surface facilitate the initial installation and the subsequent separation. An extension is formed downward at the bottom of the top pressing surface and the side slope, and a connecting shaft passes through the extension. The torsion spring is positioned near the extension.

[0013] As a preferred technical solution of the present invention, a limiting post is fixed at an equal angle on one side of the connecting plate, and a push plate is fixed at an equal angle on the other side of the connecting plate. A ring plate is fixed on the rotating part, which is attached to one side of the connecting plate, and a rotating groove is provided on the ring plate for the limiting post to pass through. One end of the push plate is fixed to the inner wall of the circular hole of the connecting plate, while the other end of the push plate extends toward the mounting base, and the push plate is in contact with the surface of the insertion part, and the push plate abuts against the side slope in the rotating state.

[0014] As a preferred technical solution of the present invention, a spring is also provided in the rotating groove. One end of the spring is fixed on the inner wall of the rotating groove, while the other end of the spring abuts against the surface of the limiting post, so as to ensure that the spring will not separate from the ring plate and can always abut against the limiting post.

[0015] As a preferred technical solution of the present invention, the mounting base includes a connecting cylinder and a metal plate; The opening of the connecting cylinder protrudes inward and is inserted into the gap between the irregularly shaped block and the connecting plate to achieve a locking connection. The metal plate is fixed to the end of the connecting cylinder, and holes are opened at the four corners of the metal plate, which can be used to install it with the side door through the bolt through the holes.

[0016] As a preferred technical solution of the present invention, the hanging component includes a hook and a hook base; The cross-section of the support frame is inverted U-shape, and the hook is fixed to the inner top of the support frame. The hook seat is installed on the side-opening door, and the middle of the hook seat is provided with a columnar body for hanging hooks.

[0017] As a preferred technical solution of the present invention, it further includes a hook plate, the middle of which protrudes outward and a notch is formed at the top of the middle of the hook plate. The hook is disposed in the middle of the hook plate and is inserted into the notch. The hook plate is fixed on the power supply vehicle.

[0018] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the ladder is placed by hooking it inside the side door, which effectively avoids the drawback of occupying space inside the carriage. Its upper part is precisely hooked on a specially made hook seat on the side door, while the lower part is fixed by a limiting mechanism. The overall structure is sturdy and durable and can withstand the test of frequent daily use. Meanwhile, the ladder body is made of aluminum, which is lightweight. When the side door is opened, the ladder can be easily put on and taken off with simple operation. The operation is labor-saving and smooth, which greatly improves the efficiency of use. In addition, considering the different usage scenarios of different power vehicles and the different positions of personnel going up and down the ladder, the hook plate can be flexibly arranged according to actual needs to ensure that the installation is firm and reliable, which can fully meet the needs of personnel going up and down the ladder in different working conditions for various types of power vehicles. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of the internal hook-mounted ladder; Figure 2 This is a schematic diagram of the assembly of the inner hook-mounted ladder and the hook seat; Figure 3 for Figure 2 Enlarged view of region A in the middle; Figure 4 This is a schematic diagram showing the connection between the support frame, the limiting mechanism, and the mounting base; Figure 5 This is a schematic diagram showing the connection between the connecting plate and the connecting rod; Figure 6 This is a schematic diagram showing the connection between the connecting rod and the irregularly shaped card block; Figure 7 This is a sectional view of the connection between the connecting rod and the mounting base; Figure 8 This is a schematic diagram of the irregularly shaped limiting block; Figure 9 A schematic diagram showing the internal hook-mounted ladder installed inside a side-opening door; Figure 10 This is a schematic diagram showing the state of the internal hook-mounted ladder and power supply vehicle during assembly. Figure 11 This is a front view of the hook board.

[0020] In the picture: 100. Support frame; 101. Pedal; 102. Hook; 103. Connecting plate; 103a. Limiting post; 103b. Push plate; 200. Hook base; 201. Columnar body; 301, connecting rod; 301a, rotating part; 301b, insertion part; 301b-1, arc groove; 302, irregularly shaped clamping block; 302a, top pressing surface; 302b, side inclined surface; 302c, extension; 302d, connecting shaft; 303, Ring plate; 303a, Rotating groove; 304, Spring; 305, Torsion spring; 401. Connecting cylinder; 402. Metal plate; 500. Side-opening door; 600. Power supply cart; 601. Hook board. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 11 The present invention provides a technical solution: a hook-on ladder inside the side door of a power vehicle, wherein the top of the ladder is provided with a hanging part, and a limiting mechanism is provided near the bottom inner side of the ladder; The limiting mechanism consists of a connecting component, a carrier component, and a mounting base; One end of the load-bearing component is fixed to the inner side of the bottom of the ladder, and the other end extends towards the middle of the ladder; The connecting assembly includes a connecting rod 301 and a limiting part; The connecting rod 301 is connected to the other end of the bearing member, and the limiting part is provided at the end of the connecting rod 301 facing the mounting base. The limiting part rotates synchronously with the connecting rod 301 and abuts against the bearing member when rotating in the specified direction. One end of the mounting base is movably fitted onto the connecting rod 301 and abuts against the limiting part, while the other end of the mounting base is fixed to the side-opening door 500, as detailed in the reference section. Figure 9 .

[0023] In this embodiment, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The ladder includes two parallel support frames 100 and equidistant steps 101 fixed inside the support frames 100. To ensure sufficient strength and lightness, the support frames 100 are made of high-strength aluminum alloy, specifically 6061-T6 aluminum alloy. This aluminum alloy has excellent mechanical properties, with a tensile strength of over 290 MPa, a yield strength of approximately 240 MPa, and a density of only 2.7 g / cm³. 3 Compared to steel, this significantly reduces the overall weight of the ladder, making it easier for operators to access. The 101 footboard is made of fiberglass, which is lightweight, high-strength, and corrosion-resistant. Its density is approximately 1.8-2.1 g / cm³. 3 Its specific strength is much higher than that of steel, enabling it to withstand greater loads. Additionally, the surface of the pedal 101 is designed with anti-slip protrusions, which effectively increase the friction between the foot and the pedal 101, preventing slips during climbing. The pedal 101 is fixedly connected to the support frame 100 by bolts made of stainless steel, with a specification of M6×20. One bolt is installed at each of the four corners of each pedal to ensure a firm and reliable connection between the pedal and the support frame. The supporting component is a connecting plate 103. One end of the connecting plate 103 is fixed to the inside of the support frame 100 by bolts, while the other end of the connecting plate 103 has a round hole for the connecting components to pass through.

[0024] In this embodiment, refer to Figure 4 and Figure 5 The connecting rod 301 includes a rotating part 301a and a plugging part 301b; The rotating part 301a is located on one side of the connecting plate 103, and the end face of one end of the rotating part 301a forms the rotating part. The diameter of the rotating part is larger than the diameter of the rotating part 301a. In use, the rotating part is mainly used to achieve the purpose of rotating the entire connecting rod 301. The plug-in part 301b is located on the other side of the connecting plate 103. The plug-in part 301b is integrally disposed on the rotating part 301a. An arc groove 301b-1 is formed on the surface of the plug-in part 301b, and a limiting part is disposed in the arc groove 301b-1.

[0025] In this embodiment, refer to Figure 5 and Figure 6 The limiting part includes an irregularly shaped locking block 302 and a torsion spring 305; The irregularly shaped card block 302 is disposed in the arc groove 301b-1. The irregularly shaped card block 302 has two inclined surfaces and abuts against the mounting base. The torsion spring 305 is disposed between the irregularly shaped block 302 and the arc groove 301b-1, and is disposed near one end of the irregularly shaped block 302.

[0026] In this embodiment, refer to Figure 8 The two inclined surfaces of the irregularly shaped card block 302 are the top pressing surface 302a and the side inclined surface 302b formed on its top and one side, respectively; the top pressing surface 302a and the side inclined surface 302b facilitate the initial installation and the subsequent separation. An extension 302c is formed downward at the bottom of the top pressure surface 302a and the side slope 302b, and a connecting shaft 302d passes through the extension 302c. The torsion spring 305 is positioned near the extension 302c.

[0027] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 A limiting post 103a is fixed at an equal angle on one side of the connecting plate 103, while a push plate 103b is fixed at an equal angle on the other side of the connecting plate 103. A ring plate 303 is fixed on the rotating part 301a. The ring plate 303 is attached to one side of the connecting plate 103, and a rotating groove 303a is provided on the ring plate 303 for the limiting post 103a to pass through. One end of the push plate 103b is fixed to the inner wall of the circular hole of the connecting plate 103, while the other end of the push plate 103b extends toward the mounting base, and the push plate 103b is in contact with the surface of the insertion part 301b, and the push plate 103b abuts against the side inclined surface 302b in the rotating state.

[0028] In this embodiment, refer to Figure 6 and Figure 7 A spring 304 is also provided in the rotating groove 303a. One end of the spring 304 is fixed on the inner wall of the rotating groove 303a, while the other end of the spring 304 abuts against the surface of the limiting post 103a, so as to ensure that the spring 304 will not separate from the ring plate 303, and can always abut against the limiting post 103a.

[0029] In this embodiment, refer to Figure 4 and Figure 7 The mounting base includes a connecting cylinder 401 and a metal plate 402. The connecting cylinder 401 is made of 304 stainless steel, and its opening protrusion is 3mm high, allowing for a good locking connection with the irregularly shaped locking block 302. The connecting cylinder 401 has a diameter of 22mm and a length of 80mm, and is machined by turning to ensure the precision of the inner hole and the surface finish. The metal plate 402 is fixed to the end of the connecting cylinder 401, and is made of the same 304 stainless steel as the connecting cylinder 401, with dimensions of 100mm in length, 80mm in width, and 5mm in thickness. The metal plate has holes with a diameter of 10mm at its four corners, which can be used to install the side-opening door 500 through the through holes of M8×30 ​​stainless steel bolts, ensuring a firm and reliable connection between the mounting base and the side-opening door 500. The opening of the connecting cylinder 401 protrudes inward and is inserted into the gap between the irregularly shaped locking block 302 and the connecting plate 103 to achieve a locking connection; the connecting cylinder 401 does not contact the push plate 103b to avoid the phenomenon of mutual resistance and the push plate 103b being unable to rotate.

[0030] Metal plate 402 is fixed to the end of connecting cylinder 401, and holes are opened at the four corners of metal plate 402, which can be installed with side door 500 through bolt through holes.

[0031] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 The hanging device includes a hook 102 and a hook base 200. The hook 102 is made of 304 stainless steel, which has good corrosion resistance and strength, and can be used for a long time in various harsh environments without rusting. The hook 102 is J-shaped. The cross-section of the support frame 100 is inverted U-shape, and the hook 102 is fixed to the inner top of the support frame 100. The hook base 200 is installed on the side-opening door 500, and the middle part of the hook base 200 is provided with a columnar body 201 for the hook 102 to hang.

[0032] In this embodiment, refer to Figure 10 and Figure 11 It also includes a hook plate 601, the middle of which protrudes outward and a notch is formed at the top of the middle of the hook plate 601. The hook 102 is hooked at the middle of the hook plate 601 and inserted into the notch. The hook plate 601 is fixed on the power supply vehicle 600.

[0033] The following describes the procedure for taking, placing, and using this ladder: In place: First, hang the hook 102 on the column 201. Rotate the bottom of the ladder downwards until the connecting rod 301 contacts the connecting cylinder 401. Since the connecting cylinder 401 can only be limited by the irregularly shaped locking block 302, the diameter of the connecting cylinder 401 is larger than the diameter of the insertion part 301b. Therefore, the insertion part 301b, which rotates downwards with the ladder, will first lock into the connecting cylinder 401. At this time, the entire ladder and connecting rod 301 are in a vertical position. Then, press the rotating part 301a, and the irregularly shaped locking block 302 will move towards... The internal movement of the connecting cylinder 401 causes the top pressing surface 302a on the irregularly shaped block 302 to contact and be squeezed with the connecting cylinder 401. The irregularly shaped block 302 rotates downward around the connecting shaft 302d toward the inside of the arc groove 301b-1 and squeezes the torsion spring 305 until the entire irregularly shaped block 302 passes the protrusion of the opening of the connecting cylinder 401, thereby achieving the limiting of the bottom of the ladder and the mounting base, thus meeting the placement requirements. It is placed inside the side-opening door 500 and does not take up space. When retrieving: Rotate the connecting rod 301. At this time, the connecting rod 301 drives the irregularly shaped locking block 302 to rotate synchronously. The side inclined surface 302b will abut against the push plate 103b during rotation. At this time, the irregularly shaped locking block 302 will also rotate downward around the side inclined surface 302b toward the inside of the arc groove 301b-1 and squeeze the torsion spring 305. Then pull the connecting rod 301 back, so that the irregularly shaped locking block 302 disengages from the inside of the connecting cylinder 401, thereby separating the bottom of the ladder from the mounting base. Then lift the ladder up to separate the column 201 from the hook 102. When the connecting rod 301 is rotated, the spring 304 will press the limiting post 103a to generate a rebound force. After the separation is completed, the rebound of the spring 304 can rotate the entire connecting rod 301 and the irregularly shaped block 302 back to the initial position, so that the side slope 302b no longer abuts against the push plate 103b. At the same time, the rotating groove 303a can also limit the rotation angle of the connecting rod 301. The limiting post 103a can not only press against the spring 304 and limit the angle of the connecting rod 301, but also ensure that the connecting rod 301 will not separate from the connecting plate 103 during the pull-back. In use: Simply hang the hook 102 on the hook plate 601 and place the bottom support of the ladder on the ground.

[0034] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hook-and-climb ladder inside the side door of a power supply vehicle, characterized in that: The ladder is equipped with a hanging device at the top, and a limiting mechanism is located near the bottom inner side of the ladder; The limiting mechanism consists of a connecting component, a carrier component, and a mounting base; One end of the support member is fixed to the inner side of the bottom of the ladder, and the other end extends toward the middle of the ladder. The connecting assembly includes a connecting rod (301) and a limiting part; The connecting rod (301) is connected through to the other end of the bearing member, and the limiting part is provided at the end of the connecting rod (301) facing the mounting base. The limiting part rotates synchronously with the connecting rod (301) and abuts against the bearing member when rotating in a specified direction. One end of the mounting base is movably sleeved on the connecting rod (301) and abuts against the limiting part, while the other end of the mounting base is fixed on the side door (500).

2. The power supply vehicle side door inner hook ladder according to claim 1, characterized in that: The ladder includes two parallel support frames (100) and equidistant steps (101) fixed inside the support frames (100). The supporting component is a connecting plate (103). One end of the connecting plate (103) is fixed to the inside of the support frame (100) by bolts, while the other end of the connecting plate (103) has a round hole for the connecting component to pass through.

3. A power supply vehicle side door inner hook ladder according to claim 2, characterized in that: The connecting rod (301) includes a rotating part (301a) and a plugging part (301b). The rotating part (301a) is located on one side of the connecting plate (103), and the rotating part is formed at the end face of one end of the rotating part (301a). The plug-in part (301b) is located on the other side of the connecting plate (103). The plug-in part (301b) is integrally disposed on the rotating part (301a). An arc groove (301b-1) is provided on the surface of the plug-in part (301b), and the limiting part is disposed in the arc groove (301b-1).

4. A power supply vehicle side door inner hook ladder according to claim 3, characterized in that: The limiting part includes an irregularly shaped locking block (302) and a torsion spring (305); The irregularly shaped card block (302) is disposed in the arc groove (301b-1), and the irregularly shaped card block (302) has two inclined surfaces. The irregularly shaped card block (302) abuts against the mounting base. The torsion spring (305) is disposed between the irregularly shaped card block (302) and the arc groove (301b-1), and is disposed near one end of the irregularly shaped card block (302).

5. A power supply vehicle side door inner hook ladder according to claim 4, characterized in that: The two inclined surfaces of the irregularly shaped card block (302) are the top pressing surface (302a) and the side inclined surface (302b) formed on its top and one side respectively. An extension (302c) is formed downward at the bottom of the top pressure surface (302a) and the side slope (302b), and a connecting shaft (302d) passes through the extension (302c). The torsion spring (305) is positioned near the extension (302c).

6. A power supply vehicle side door inner hook ladder according to claim 5, characterized in that: A limiting post (103a) is fixed at an equal angle on one side of the connecting plate (103), while a push plate (103b) is fixed at an equal angle on the other side of the connecting plate (103). A ring plate (303) is fixed on the rotating part (301a). The ring plate (303) is attached to one side of the connecting plate (103), and a rotating groove (303a) is provided on the ring plate (303) for the limiting post (103a) to pass through. One end of the push plate (103b) is fixed to the inner wall of the circular hole of the connecting plate (103), while the other end of the push plate (103b) extends toward the mounting base, and the push plate (103b) is in contact with the surface of the insertion part (301b), and the push plate (103b) abuts against the side inclined surface (302b) in the rotating state.

7. A power supply vehicle side door inner hook ladder according to claim 6, characterized in that: A spring (304) is also provided in the rotating groove (303a). One end of the spring (304) is fixed on the inner wall of the rotating groove (303a), while the other end of the spring (304) abuts against the surface of the limiting post (103a).

8. A power supply vehicle side door inner hook ladder according to claim 6, characterized in that: The mounting base includes a connecting cylinder (401) and a metal plate (402); The opening of the connecting cylinder (401) protrudes inward and is inserted into the gap between the irregularly shaped card block (302) and the connecting plate (103); The metal plate (402) is fixed to the end of the connecting cylinder (401), and holes are provided at the four corners of the metal plate (402).

9. A power supply vehicle side door inner hook ladder according to claim 2, characterized in that: The hanging component includes a hook (102) and a hook base (200); The cross-section of the support frame (100) is inverted U-shape, and the hook (102) is fixed on the inner side of the top of the support frame (100); The hook seat (200) is installed on the side door (500), and the middle part of the hook seat (200) is provided with a columnar body (201) for the hook (102) to hang.

10. A power supply vehicle side door inner hook ladder according to claim 9, characterized in that: It also includes a hook plate (601), the middle of which protrudes outward, and a notch is formed at the top of the middle of the hook plate (601). The hook (102) is hooked at the middle of the hook plate (601) and inserted into the notch.

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