Electric wheel rear axle box maintenance port escalator

Abstract

This utility model discloses a ladder for the maintenance port of an electric wheel rear axle box, including a ladder assembly disposed within the maintenance port of the rear axle box. The ladder assembly includes a ladder body, a ladder sub-body, and a fixed mounting plate. The fixed mounting plate is installed on the inner wall of the rear axle box at the maintenance port. One end of the ladder sub-body is hinged to the fixed mounting plate to form hinge point A, and the other end is hinged to the ladder body to form hinge point B. The ladder body and the ladder sub-body are provided with evenly distributed climbing rods. By providing a rotatable and foldable ladder body and ladder sub-body at the maintenance port of the rear axle box, which can be stored inside the rear axle box when not in use and unfolded by rotating when in use, this solves the problems of untimely maintenance work or forced use of unsafe operating methods due to limited maintenance space, as well as the time-consuming and laborious problem of transporting external auxiliary equipment. Furthermore, the ladder sub-body and the ladder body are close together when in use, enabling safe single-person operation.

Description

Technical Field

[0001] This utility model relates to a ladder for the maintenance access of the rear axle box of an electric wheel, belonging to the technical field of engineering machinery. Background Technology

[0002] In the maintenance and repair of rear axle housings of large construction machinery, especially heavy vehicles such as mining trucks, technicians often need to approach and operate maintenance access ports located high on the vehicle chassis. These access ports are usually at a certain height above the ground, and the workspace is often located in areas with dense equipment or relatively limited space, such as repair shops, mining sites, or temporary equipment parking areas.

[0003] Currently, such high-altitude operations generally rely on external auxiliary climbing equipment such as high stools, ordinary ladders, or simple platforms. However, these external auxiliary devices are usually quite large and require a sufficiently flat and spacious area around the vehicle for safe placement and stable support. In cramped maintenance bays, crowded parking areas, or rugged field work sites, it is often difficult to find a suitable placement location, resulting in maintenance work not being able to be carried out in a timely manner or forcing the use of unsafe operating methods, i.e., space limitations exist.

[0004] When using ordinary escalators or bar stools, an additional assistant is often needed on-site to provide support and supervision, ensuring the stability of technicians working at heights and preventing equipment tipping or falls. This not only increases labor costs but also poses an obstacle when staffing is limited or when single-person operations are required.

[0005] These external auxiliary equipment are usually quite bulky, and transporting them between different workstations in the maintenance workshop or between different work sites, such as different maintenance points in a mine, is time-consuming and labor-intensive. Not only is the transport inefficient, but it also increases the risk of collisions damaging the equipment or causing injuries such as sprains or crushing wounds to the transport personnel. This inconvenience and danger directly leads to delays or simplifications in routine equipment maintenance, affecting equipment reliability. Summary of the Invention

[0006] Purpose of the invention: To solve the above-mentioned technical problems, this utility model provides a ladder for the maintenance port of the electric wheel rear axle box. By setting a rotatable and foldable ladder main body and ladder sub-body, the problems of space limitation, time-consuming and laborious transportation, and safety of single-person operation are solved.

[0007] Technical Solution: A ladder for the maintenance port of an electric wheel rear axle housing, comprising a ladder assembly disposed within the maintenance port of the rear axle housing. The ladder assembly includes a ladder body, a ladder sub-body, and a fixed mounting plate. The fixed mounting plate is mounted on the inner wall of the rear axle housing at the maintenance port. One end of the ladder sub-body is hinged to the fixed mounting plate to form hinge point A, and the other end is hinged to the ladder body to form hinge point B. After the ladder sub-body rotates outward around hinge point A, the end of the ladder sub-body abuts against the maintenance port wall, while the ladder body rotates... After hinge point B rotates outward toward the rear axle box, its end near hinge point B abuts against the escalator sub-body. The escalator body rotates around hinge point B toward the maintenance opening and folds with the escalator sub-body. When the escalator body and escalator sub-body are in the folded state, the distance from the end of the escalator body away from hinge point B to hinge point A is less than the distance from hinge point A to the top of the maintenance opening, and the distance from hinge point A to hinge point B is less than the distance from hinge point A to the top of the maintenance opening. The escalator body and escalator sub-body are provided with evenly distributed climbing rods.

[0008] This invention solves the problems of limited maintenance space leading to delayed or unsafe maintenance procedures, as well as the time-consuming and labor-intensive transport of external auxiliary equipment. The escalator body and auxiliary body are folded together at the maintenance port of the rear axle housing. When not in use, they are stored inside the rear axle housing; when needed, they are unfolded by rotation. Furthermore, the escalator body and auxiliary body are tightly fitted together during use, allowing for safe single-person operation. Initially, when not in use, the escalator body and auxiliary body are folded inside the rear axle housing, preventing collisions with external objects during vehicle movement. When needed, the auxiliary body is rotated out of the rear axle housing around hinge point A, bringing it into contact with the maintenance port wall. Then, the escalator body is rotated around hinge point B to release the fold and fit tightly against the auxiliary body. To retract the escalator, the escalator body and auxiliary body are first restored to their folded state, and then the auxiliary body is rotated back into the rear axle housing around hinge point A, completing the repositioning of the escalator body and auxiliary body.

[0009] In a preferred embodiment, in order to ensure that the main body of the escalator can fit tightly against the auxiliary body of the escalator after rotation, and to ensure that the two are parallel and easy to climb, the width of the main body of the escalator is smaller than the width of the auxiliary body of the escalator. The climbing rods at the ends of the auxiliary body of the escalator near the hinge point B are respectively provided with grooves. After the main body of the escalator rotates outward around the hinge point B, it abuts against the bottom of the groove.

[0010] In a preferred embodiment, to improve the reliability of the escalator sub-body installation, the fixing plate includes a support portion and a first connecting portion. The support portion is fixedly connected to the inner wall of the rear axle box at the maintenance port, and the first connecting portion is fixedly connected to the maintenance port wall. The end of the first connecting portion is hinged to the escalator sub-body to form a hinge point A.

[0011] In a preferred embodiment, in order to enable the escalator sub-body to fit against the maintenance access wall after rotation, thereby improving stability and safety during climbing, the end of the escalator sub-body is provided with a second connecting part. The escalator sub-body is hinged to the end of the first connecting part through the second connecting part to form a hinge point A. After the second connecting part rotates outward around the hinge point A, the escalator sub-body abuts against the maintenance access wall through the second connecting part at its end.

[0012] In a preferred embodiment, to improve the reliability of the hinge connection between the escalator body and the escalator sub-body, the escalator body and the escalator sub-body are hinged together by a first hinge assembly. The first hinge assembly includes a pin sleeve, a nylon sleeve, a first bolt, a first nut, and a connecting plate installed on the outer wall of the escalator sub-body. The escalator body and the connecting plate are connected by the first bolt and the first nut. The pin sleeve is fitted outside the first bolt, and the nylon sleeve is fitted outside the pin sleeve.

[0013] In a preferred embodiment, in order to fold the escalator body and the escalator sub-body into the rear axle box, prevent them from colliding and rubbing against each other when the vehicle vibrates, and at the same time facilitate the rotation after folding, after the escalator body rotates around the hinge point B toward the maintenance opening and the escalator sub-body is folded, one end of the escalator sub-body away from the hinge point B is detachably connected to the escalator body by a second bolt and nut assembly.

[0014] In a preferred embodiment, to improve the stability of the escalator assembly when it is inside the rear axle box, a welding plate is provided on the inner wall of the rear axle box. When the escalator body and the escalator sub-body are in a folded state, the escalator sub-body rotates around hinge point A into the rear axle box so that the climbing rod at the end of the escalator body away from hinge point A abuts against the welding plate.

[0015] In a preferred embodiment, to ensure the aesthetic appeal of the escalator body and escalator sub-body after folding, the escalator body rotates around hinge point B towards the maintenance opening and folds with the escalator sub-body, and is then connected to the escalator sub-body via a second bolt and nut assembly, making it parallel to the escalator sub-body.

[0016] Beneficial effects: This utility model solves the problems of untimely maintenance work or unsafe operation methods caused by cramped maintenance space, as well as the time-consuming and laborious transportation of external auxiliary equipment, by setting a rotatable and foldable escalator main body and escalator auxiliary body at the maintenance port of the rear axle box. When not in use, they are stored in the rear axle box and unfolded by rotating when in use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a structural diagram of the escalator of this utility model in use;

[0019] Figure 2 This is an external view of the escalator of this utility model when it is inside the rear axle box;

[0020] Figure 3 This is an internal view of the escalator of this utility model when it is inside the rear axle box;

[0021] Figure 4 This is a view of the escalator sub-body and the escalator main body in their non-folded state.

[0022] Figure 5 This is a folded view of the escalator sub-body and the escalator main body of this utility model;

[0023] Figure 6 This is a structural diagram of the first hinge assembly of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figures 1-3 As shown, an escalator for the maintenance port of an electric wheel rear axle box includes an escalator assembly 1 disposed within the maintenance port 7 of the rear axle box 6. The escalator assembly 1 includes an escalator body 11, an escalator sub-body 12, and a fixed mounting plate 13. The fixed mounting plate 13 is mounted on the inner wall of the rear axle box 6 at the maintenance port 7. One end of the escalator sub-body 12 is hinged to the fixed mounting plate 13 to form a hinge point A, and the other end is hinged to the escalator body 11 to form a hinge point B. After the escalator sub-body 12 rotates outward around the hinge point A towards the rear axle box 6, the end of the escalator sub-body 12 abuts against the wall of the maintenance port 7. At the same time, after the escalator body 11 rotates outward around the hinge point B towards the rear axle box 6, the end of the escalator body 11 near the hinge point B abuts against the escalator sub-body 12.

[0028] After the escalator body 11 rotates around hinge point B toward the maintenance opening 7, it folds with the escalator sub-body 12. When the escalator body 11 and the escalator sub-body 12 are in the folded state, the distance from the end of the escalator body 11 away from hinge point B to hinge point A is less than the distance from hinge point A to the top of the maintenance opening 7, and the distance from hinge point A to hinge point B is less than the distance from hinge point A to the top of the maintenance opening 7. The escalator body 11 and the escalator sub-body 12 are provided with evenly distributed climbing bars 2.

[0029] By installing a rotatable and foldable escalator main body 11 and escalator sub-body 12 at the maintenance port 7 of the rear axle box 6, which can be stored inside the rear axle box 6 when not in use and unfolded by rotating when in use, the problems of untimely maintenance work or unsafe operating methods caused by limited maintenance space and the time-consuming and laborious transportation of external auxiliary equipment are solved. In addition, the escalator sub-body 12 and escalator main body 11 are close together when in use, which can realize safe single-person operation. In the initial unused state, the escalator main body 11 and escalator sub-body 12 are folded. The escalator is positioned inside the rear axle housing 6, preventing collisions between the escalator and external objects when the vehicle is in motion. When needed, the escalator sub-body 12 is first rotated out of the rear axle housing 6 around hinge point A, making it abut against the wall of the maintenance opening 7. Then, the escalator main body 11 is rotated around hinge point B to release the folded state and fit snugly against the escalator sub-body 12. When it needs to be folded up, the escalator main body 11 and escalator sub-body 12 are first restored to the folded state, and then the escalator sub-body 12 is rotated back into the rear axle housing 6 around hinge point A, completing the reset of the escalator main body 11 and escalator sub-body 12.

[0030] like Figure 5 As shown, in order to ensure that the escalator body 11 can fit tightly against the escalator sub-body 12 after rotation, and to ensure that the two are parallel and easy to climb, the width of the escalator body 11 is smaller than the width of the escalator sub-body 12. The climbing rod 2 at the end of the escalator sub-body 12 near the hinge point B is provided with grooves 121 at both ends. After the escalator body 11 rotates outward around the hinge point B towards the rear bridge box 6, it abuts against the bottom of the groove 121.

[0031] To improve the reliability of the installation of the escalator sub-body 12, the fixed mounting plate 13 includes a support part 131 and a first connecting part 132. The support part 131 is fixedly connected to the inner wall of the rear axle box 6 at the maintenance port 7, and the first connecting part 132 is fixedly connected to the wall of the maintenance port 7. The end of the first connecting part 132 is hinged to the escalator sub-body 12 to form a hinge point A.

[0032] like Figure 4 and Figure 5 As shown, in order to make the escalator sub-body 12 fit against the wall of the maintenance opening 7 after rotation, thereby improving stability and safety during climbing, the end of the escalator sub-body 12 is provided with a second connecting part 122. The escalator sub-body 12 is hinged to the end of the first connecting part 132 through the second connecting part 122 to form a hinge point A. After the second connecting part 122 rotates outward around the hinge point A towards the rear bridge box 6, the escalator sub-body 12 abuts against the wall of the maintenance opening 7 through the second connecting part 122 at its end.

[0033] like Figure 6As shown, in order to improve the reliability of the hinge connection between the escalator body 11 and the escalator sub-body 12, the escalator body 11 and the escalator sub-body 12 are hinged together by a first hinge assembly 3. The first hinge assembly 3 includes a pin sleeve 31, a nylon sleeve 32, a first bolt 33, a first nut 34, and a connecting plate 35 installed on the outer wall of the escalator sub-body 12. The escalator body 11 and the connecting plate 35 are connected by the first bolt 33 and the first nut 34. The pin sleeve 31 is sleeved outside the first bolt 33, and the nylon sleeve 32 is sleeved outside the pin sleeve 31.

[0034] In order to fold the escalator body 11 and the escalator sub-body 12 into the rear axle box 6, prevent them from colliding and rubbing against each other when the vehicle vibrates, and at the same time facilitate the rotation after folding, after the escalator body 11 rotates around the hinge point B toward the maintenance port 7 and the escalator sub-body 12 is folded, the end of the escalator sub-body 12 away from the hinge point B is detachably connected to the escalator body 11 by the second bolt and nut assembly 4. Example 1

[0035] To improve the stability of the escalator assembly 1 when it is inside the rear axle box 6, the inner wall of the rear axle box 6 is provided with a welding plate 5. When the escalator body 11 and the escalator sub-body 12 are in a folded state, the escalator sub-body 12 rotates around the hinge point A into the rear axle box 6 so that the climbing rod 2 at the end of the escalator body 11 away from the hinge point A abuts against the welding plate 5. Example 2

[0036] In order to make the escalator body 11 and escalator sub-body 12 aesthetically pleasing after folding, the escalator body 11 is rotated around the hinge point B towards the maintenance opening 7 and folded with the escalator sub-body 12. After being connected to the escalator sub-body 12 by the second bolt and nut assembly 4, it is parallel to the escalator sub-body 12.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ladder for maintenance access to an electric rear axle box, characterized in that: The escalator assembly (1) is installed in the maintenance port (7) of the rear axle box (6). The escalator assembly (1) includes an escalator body (11), an escalator sub-body (12), and a fixed mounting plate (13). The fixed mounting plate (13) is installed on the inner wall of the rear axle box (6) at the maintenance port (7). One end of the escalator sub-body (12) is hinged to the fixed mounting plate (13) to form a hinge point A, and the other end is hinged to the escalator body (11) to form a hinge point B. After the escalator sub-body (12) rotates outward around the hinge point A towards the rear axle box (6), the end of the escalator sub-body (12) abuts against the wall of the maintenance port (7). At the same time, after the escalator body (11) rotates outward around the hinge point B towards the rear axle box (6), its end near the hinge point B abuts against the escalator sub-body (12). After the escalator body (11) rotates around hinge point B toward the maintenance opening (7), it folds with the escalator sub-body (12). When the escalator body (11) and the escalator sub-body (12) are in the folded state, the distance from the end of the escalator body (11) away from hinge point B to hinge point A is less than the distance from hinge point A to the top of the maintenance opening (7). The distance from hinge point A to hinge point B is less than the distance from hinge point A to the top of the maintenance opening (7). The escalator body (11) and the escalator sub-body (12) are provided with evenly distributed climbing rods (2).

2. The ladder for the maintenance access of the electric wheel rear axle box according to claim 1, characterized in that: The width of the escalator body (11) is smaller than the width of the escalator sub-body (12). The climbing rod (2) at the end of the escalator sub-body (12) near the hinge point B is provided with grooves (121) at both ends. After the escalator body (11) rotates outward around the hinge point B towards the rear bridge box (6), it abuts against the bottom of the groove (121).

3. The ladder for the maintenance access of the electric wheel rear axle box according to claim 1, characterized in that: The fixed mounting plate (13) includes a support part (131) and a first connecting part (132). The support part (131) is fixedly connected to the inner wall of the rear axle box (6) at the maintenance port (7). The first connecting part (132) is fixedly connected to the wall of the maintenance port (7). The end of the first connecting part (132) is hinged to the escalator sub-body (12) to form a hinge point A.

4. The ladder for the maintenance access of the electric wheel rear axle box according to claim 3, characterized in that: The end of the escalator sub-body (12) is provided with a second connecting part (122). The escalator sub-body (12) is hinged to the end of the first connecting part (132) through the second connecting part (122) to form a hinge point A. After the second connecting part (122) rotates outward around the hinge point A towards the rear bridge box (6), the escalator sub-body (12) abuts against the wall of the maintenance opening (7) through the second connecting part (122) at its end.

5. The ladder for the maintenance access of the electric wheel rear axle box according to claim 2 or 4, characterized in that: The escalator body (11) and the escalator sub-body (12) are hinged together by a first hinge assembly (3). The first hinge assembly (3) includes a pin sleeve (31), a nylon sleeve (32), a first bolt (33), a first nut (34), and a connecting plate (35) installed on the outer wall of the escalator sub-body (12). The escalator body (11) and the connecting plate (35) are connected by the first bolt (33) and the first nut (34). The pin sleeve (31) is sleeved outside the first bolt (33), and the nylon sleeve (32) is sleeved outside the pin sleeve (31).

6. The ladder for the maintenance access of the electric wheel rear axle box according to claim 5, characterized in that: After the escalator body (11) rotates around the hinge point B toward the maintenance opening (7) and the escalator sub-body (12) is folded, one end of the escalator sub-body (12) away from the hinge point B is detachably connected to the escalator body (11) through the second bolt and nut assembly (4).

7. The ladder for the maintenance access of the electric wheel rear axle box according to claim 6, characterized in that: The inner wall of the rear axle box (6) is provided with a welding plate (5). When the escalator body (11) and the escalator sub-body (12) are in a folded state, the escalator sub-body (12) rotates around the hinge point A into the rear axle box (6) so that the climbing rod (2) at the end of the escalator body (11) away from the hinge point A abuts against the welding plate (5).

8. The ladder for the maintenance access of the electric wheel rear axle box according to claim 7, characterized in that: The escalator body (11) rotates around the hinge point B toward the maintenance port (7) and folds with the escalator sub-body (12). After being connected to the escalator sub-body (12) by the second bolt and nut assembly (4), it is parallel to the escalator sub-body (12).

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