Suspension steering mechanism and off-highway mining dump truck

Abstract

The invention provides a suspension steering mechanism and an off-highway mining dump truck. The suspension steering mechanism comprises a steering knuckle, a steering arm, an assembly key and a connecting piece. The steering knuckle is provided with a first assembling plane, and the first assembling plane is provided with a first key groove. The steering arm is provided with a second assembling plane, and the second assembling plane is provided with a second key groove. The steering knuckle and the steering arm are assembled through the first assembling plane and the second assembling plane, and the first key groove and the second key groove are oppositely arranged. An included angle larger than 90 degrees and smaller than 180 degrees is formed between the second assembly plane and the steering plane of the suspension steering mechanism; the assembly key is accommodated in the first key slot and the second key slot; the connecting piece is connected to the first assembling plane and the second assembling plane. Through the design, the problem of stress concentration existing in the operation process of the off-highway mining dump truck is solved, effective connection of the connecting pieces is guaranteed, and the reliability and stability of a mine car steering system are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mining rail vehicles, and particularly to a suspension steering mechanism and a non-road mining dump truck. Background Art

[0002] With the progress of science and technology, large-tonnage non-road mining dump trucks have been widely used in open-pit mines. The working characteristics of short-distance, continuous operation, frequent steering, and climbing require that their steering mechanisms must be safe and reliable. In the MacPherson suspension steering mechanism, the steering knuckle is fixed to a shaft through a suspension steel shaft and a suspension. The steering cylinder pushes the steering arm to achieve steering. However, due to limited installation space of the steering mechanism and complex manufacturing processes, etc., the steering knuckle and the steering arm are usually connected by bolts and other connecting parts. Affected by factors such as frequent steering and overloading, stress concentration problems are likely to occur at this part, resulting in bolt fractures. Summary of the Invention

[0003] A main object of the present disclosure is to overcome at least one defect of the above-mentioned prior art, and to provide a suspension steering mechanism that can avoid stress concentration problems.

[0004] To achieve the above object, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, there is provided a suspension steering mechanism for a non-road mining dump truck, including: a steering knuckle, a steering arm, an assembly key, and a connecting member; the steering knuckle has a first assembly plane, and a first keyway is provided on the first assembly plane; the steering arm has a second assembly plane, and a second keyway is provided on the second assembly plane; the steering knuckle and the steering arm are assembled via the first assembly plane and the second assembly plane, and the first keyway and the second keyway are arranged opposite to each other; an angle greater than 90° and less than 180° is formed between the second assembly plane and the steering plane of the suspension steering mechanism; the assembly key is received in the first keyway and the second keyway; the connecting member is connected between the first assembly plane and the second assembly plane.

[0006] According to one embodiment of the present disclosure, the angle between the second assembly plane and the steering plane is 100° - 150°.

[0007] According to one embodiment of the present disclosure, the steering arm includes a first arm and a second arm, the first arm and the second arm are bent and connected, a side surface of the first arm facing the steering knuckle is the second assembly plane, and the second arm is arranged parallel to the above-mentioned steering plane.

[0008] According to one embodiment of the present disclosure, the steering arm further includes a reinforcing rib, and the reinforcing rib is connected to a surface of the first arm facing away from the steering knuckle and the second arm.

[0009] According to one embodiment of the present disclosure, a reference plane parallel to the first assembly plane and the second assembly plane is defined, and on the reference plane, a positive projection of the reinforcing rib at least partially overlaps with a positive projection of the assembly key.

[0010] According to one embodiment of the present disclosure, the second assembly plane has a first region and a second region. The first region is a region that does not overlap with a positive projection of the second arm on a reference plane, and the second region is a region that overlaps with the positive projection of the second arm. The reference plane is parallel to the first assembly plane and the second assembly plane; the second keyway is provided in the first region; wherein, the connecting member is a bolt, and the bolt includes a first bolt and a second bolt. The first bolt is located in the first region, and the second bolt is located in the second region; the first arm is provided with a first through hole in the first region, and a first threaded hole is provided in a portion of the first assembly plane corresponding to the first region. The first bolt passes through the first through hole and is screwed into the first threaded hole; the first arm is provided with a second threaded hole in the second region, a part of the second threaded hole is located in the second arm, and a second through hole is provided in a portion of the first assembly plane corresponding to the second region. The second bolt passes through the second through hole and is screwed into the second threaded hole.

[0011] According to one embodiment of the present disclosure, the assembly key is in a "cross" shape, the first keyway is in a "cross" shape, and the second keyway is in a "cross" shape.

[0012] According to one embodiment of the present disclosure, the first assembly plane is divided into four third regions by the first keyway; wherein, the connecting member includes a first connecting member, and the first connecting member is divided into four groups, and the four groups of the first connecting members are respectively arranged in the four third regions.

[0013] According to one embodiment of the present disclosure, each group of the first connecting members includes at least two of the first connecting members.

[0014] It can be seen from the above technical solutions that the advantages and positive effects of the suspension steering mechanism proposed by the present disclosure are as follows:

[0015] The suspension steering mechanism proposed by the present disclosure includes a steering knuckle, a steering arm, a fitting key, and a connecting member; the steering knuckle has a first fitting plane, and a first keyway is provided on the first fitting plane; the steering arm has a second fitting plane, and a second keyway is provided on the second fitting plane; the steering knuckle and the steering arm are assembled via the first fitting plane and the second fitting plane, and the first keyway and the second keyway are arranged opposite to each other; an angle greater than 90° and less than 180° is formed between the second fitting plane and the steering plane of the suspension steering mechanism; the fitting key is received in the first keyway and the second keyway; the connecting member is connected to the first fitting plane and the second fitting plane. Through the above design, by changing the structures of the steering knuckle and the steering arm, optimizing the contact surface structure between the steering knuckle and the steering arm, and connecting the steering knuckle and the steering arm through the fitting key and the connecting member, the problem of stress concentration existing in the non-road mining dump truck during operation is solved, the effective connection of the connecting member is ensured, and the reliability and stability of the steering system of the mining truck are improved.

[0016] Another main object of the present disclosure is to overcome at least one defect of the above-mentioned prior art, and to provide a non-road mining dump truck adopting the above-mentioned suspension steering mechanism.

[0017] To achieve the above object, the present disclosure adopts the following technical solutions:

[0018] According to one aspect of the present disclosure, there is provided a non-road mining dump truck, which includes the suspension steering mechanism proposed by the present disclosure and described in the above embodiments.

[0019] It can be seen from the above technical solutions that the advantages and positive effects of the non-road mining dump truck proposed by the present disclosure are as follows:

[0020] For the non-road mining dump truck proposed by the present disclosure, by adopting the suspension steering mechanism proposed by the present disclosure, the problem of stress concentration existing in the non-road mining dump truck during operation is solved, the effective connection of the connecting member is ensured, and the reliability and stability of the steering system of the mining truck are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By considering the following detailed description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings, various objects, features, and advantages of the present disclosure will become more apparent. The drawings are only exemplary diagrams of the present disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0022] Figure 1 is a schematic structural diagram of a suspension steering mechanism shown according to an exemplary embodiment;

[0023] Figure 2 is Figure 1 a perspective exploded view of the suspension steering mechanism shown;

[0024] Figure 3 and Figure 4 are respectively Figure 1 the three-dimensional structural schematic diagrams of the suspension arm shown in two different perspectives;

[0025] Figure 5 is Figure 2 the three-dimensional structural schematic diagram of the assembly key shown.

[0026] The description of the reference numerals is as follows:

[0027] 100. Knuckle;

[0028] 101. First assembly plane;

[0029] 1011. First threaded hole;

[0030] 1012. Second through hole;

[0031] 102. First keyway;

[0032] 200. Steering arm;

[0033] 201. Second assembly plane;

[0034] 2011. First area;

[0035] 2012. Second area;

[0036] 202. Steering plane;

[0037] 203. Second keyway;

[0038] 210. First arm;

[0039] 2101. First through hole;

[0040] 2102. Second threaded hole;

[0041] 220. Second arm;

[0042] 230. Reinforcing rib;

[0043] 300. Assembly key;

[0044] 310. First part;

[0045] 320. Second part;

[0046] 410. First bolt;

[0047] 420. Second bolt;

[0048] A. Included angle. Detailed implementation manners

[0049] Exemplary embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various variations in different embodiments, all of which do not depart from the scope of the present disclosure, and the descriptions and drawings herein are for illustrative purposes in nature and are not intended to limit the present disclosure.

[0050] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of the present disclosure, and in which different exemplary structures, systems, and steps that can implement various aspects of the present disclosure are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used, and structural and functional modifications can be made without departing from the scope of the present disclosure. Moreover, although terms such as "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present disclosure.

[0051] Refer to Figure 1 , which representatively shows a schematic structural diagram of the suspension steering mechanism proposed by the present disclosure. In this exemplary embodiment, the suspension steering mechanism proposed by the present disclosure is described by taking its application to off-road mining dump trucks as an example. It is easy for those skilled in the art to understand that, in order to apply the relevant designs of the present disclosure to other types of rail vehicles, various modifications, additions, substitutions, deletions, or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the suspension steering mechanism proposed by the present disclosure.

[0052] As Figure 1 shown, in an embodiment of the present disclosure, the suspension steering mechanism proposed by the present disclosure includes a knuckle 100, a steering arm 200, a fitting key 300, and a connecting member. Referring in conjunction with Figures 2 to 5 , Figure 2 represents a three-dimensional exploded schematic diagram of the suspension steering mechanism; Figure 3 and Figure 4 respectively represent three-dimensional structural schematic diagrams of the suspension arm from two different perspectives; Figure 5 represents a three-dimensional structural schematic diagram of the fitting key 300. The structures, connection methods, and functional relationships of the main components of the suspension steering mechanism proposed by the present disclosure will be described in detail below in conjunction with the above-mentioned drawings.

[0053] As Figure 1 and Figure 2As shown, in an embodiment of the present disclosure, the knuckle 100 has a first assembly plane 101, and the knuckle 100 is provided with a first keyway 102 on the first assembly plane 101. The steering arm 200 has a second assembly plane 201, and the steering arm 200 is provided with a second keyway 203 on the second assembly plane 201. The knuckle 100 and the steering arm 200 are assembled via the first assembly plane 101 and the second assembly plane 201, and the first keyway 102 and the second keyway 203 are arranged opposite to each other. There is an angle AA greater than 90° and less than 180° between the second assembly plane 201 and the steering plane 202 of the suspension steering mechanism (for example, the upper surface of the second arm 220 of the steering arm 200 shown in the drawing). The assembly key 300 is received in the first keyway 102 and the second keyway 203. The connecting member is connected to the first assembly plane 101 and the second assembly plane 201. Through the above design, the present disclosure changes the structures of the knuckle 100 and the steering arm 200, optimizes the contact surface structure between the knuckle 100 and the steering arm 200, and connects the knuckle 100 and the steering arm 200 through the assembly key 300 and the connecting member, solving the stress concentration problem existing during the operation of non-road mining dump trucks, ensuring the effective connection of the connecting member, and improving the reliability and stability of the mining truck steering system.

[0054] As Figure 1 shown, in an embodiment of the present disclosure, the angle AA between the second assembly plane 201 and the steering plane 202 may be 100° to 150°, such as 100°, 120°, 135°, 150°, etc. Through the above design, the present disclosure can avoid the angle AA between the second assembly plane 201 and the steering plane 202 being too small and too close to 90°, and at the same time can avoid the angle AA between the second assembly plane 201 and the steering plane 202 being too large. When the angle AA is too large, in order to achieve the same assembly docking area (such as the area of the first assembly plane 101), the assembly structure of the knuckle 100 and the steering arm 200 will occupy a larger space. Accordingly, the present disclosure can reduce the space occupation. In some embodiments, the angle AA between the second assembly plane 201 and the steering plane 202 may also be less than 100°, or may be greater than 150°, such as 95°, 155°, etc., which is not limited to this embodiment.

[0055] As Figure 3 and Figure 4As shown, in an embodiment of the present disclosure, the steering arm 200 may include a first arm 210 and a second arm 220. The first arm 210 and the second arm 220 are bent and connected, that is, the cross-section of the steering arm 200 is generally in an "L" shape (not a right-angle bend but an obtuse-angle bend). The surface of the first arm 210 facing the steering knuckle 100 is the second assembly plane 201 as described above, and the second arm 220 is arranged parallel to the above-mentioned steering plane 202. Through the above design, the present disclosure can simplify the structural complexity of the steering arm 200, is beneficial to reducing the weight of the steering arm 200, and is beneficial to lightweight design. In some embodiments, the steering arm 200 may also adopt other structural shapes. For example, the steering arm 200 may adopt a block structure with a cross-section generally in a triangular shape, and is not limited to this embodiment.

[0056] As Figure 3 and Figure 4 shown, based on the design that the steering arm 200 includes the first arm 210 and the second arm 220, in an embodiment of the present disclosure, the steering arm 200 may further include a reinforcing rib 230, and the reinforcing rib 230 is connected to the surface of the first arm 210 facing away from the steering knuckle 100 and the second arm 220. Through the above design, the present disclosure can utilize the reinforcing rib 230 to strengthen the structural strength of the steering arm 200, and further improve the structural stability and reliability of the suspension steering mechanism.

[0057] As Figure 3 and Figure 4 shown, based on the design that the steering arm 200 includes the reinforcing rib 230, in an embodiment of the present disclosure, a reference plane parallel to the first assembly plane 101 and the second assembly plane 201 is defined. On this reference plane, the orthographic projection of the reinforcing rib 230 and the orthographic projection of the assembly key 300 may at least partially overlap. In other words, the reinforcing rib 230 and the second keyway 203 may be at least partially correspondingly arranged. Through the above design, by the special selection of the position of the reinforcing rib 230, the present disclosure can further utilize the arrangement of the reinforcing rib 230 to make up for the influence of the structural strength of the first arm 210 due to the setting of the second keyway 203, and further improve the structural strength of the steering arm 200.

[0058] As Figure 2 and Figure 3As shown, in an embodiment of the present disclosure, the second assembly plane 201 of the steering arm 200 may have a first region 2011 and a second region 2012. The first region 2011 is a region that does not overlap with the orthographic projection of the second arm 220 on a reference plane (the reference plane is, for example, parallel to the first assembly plane 101 and the second assembly plane 201), and the second region 2012 is a region that overlaps with the orthographic projection of the second arm 220. The second keyway 203 is provided in the first region 2011 of the second assembly plane 201. On this basis, the connecting member may be a bolt, and the bolt includes a first bolt 410 and a second bolt 420. The first bolt 410 is located in the first region 2011, and the second bolt 420 is located in the second region 2012. The first arm 210 is provided with a first through hole 2101 in the first region 2011, and a first threaded hole 1011 is provided in the portion of the first assembly plane 101 corresponding to the first region 2011. The first bolt 410 passes through the first through hole 2101 and is screwed into the first threaded hole 1011. The first arm 210 is provided with a second threaded hole 2102 in the second region 2012. The second threaded hole 2102 is partially located in the second arm 220. A second through hole 1012 is provided in the portion of the first assembly plane 101 corresponding to the second region 2012. The second bolt 420 passes through the second through hole 1012 and is screwed into the second threaded hole 2102. In other words, during assembly, the first bolt 410 passes through the first through hole 2101 from the side of the first arm 210 facing away from the steering knuckle 100 and is screwed to the first threaded hole 1011, and the second bolt 420 passes through the second through hole 1012 from the opposite side and is screwed to the second threaded hole 2102. Through the above design, the present disclosure can further improve the connection strength between the steering knuckle 100 and the steering arm 200 by using two parts of bolts for two-way assembly. In addition, since the second bolt 420 is partially located in the second arm 220, the present disclosure can thereby realize the connection between the steering arm 200 and the steering knuckle 100 in the region of its second arm 220, avoiding the problem that the through hole is too long and penetrates the second arm 220 when the bolt is inserted from the side of the second arm 220, which affects the structural strength.

[0059] As Figure 2 , Figure 3 and Figure 5 shown, in an embodiment of the present disclosure, the assembly key 300 may be in a "cross" shape. Correspondingly, the first keyway 102 may be in a "cross" shape, and the second keyway 203 may be in a "cross" shape. Through the above design, the present disclosure can use the above "cross"-shaped key-keyway design to realize the relative positioning of the first assembly plane 101 and the second assembly plane 201 in two perpendicular directions, further improving the assembly effect between the steering knuckle 100 and the steering arm 200, reducing the shear force and other effects on the connecting member caused by the relative displacement between the two, and further avoiding the fracture of the connecting member.

[0060] AsFigure 5 As shown, based on the "cross"-shaped design of the assembly key 300, in an embodiment of the present disclosure, the assembly key 300 may include a first part 310 and two second parts 320. The first part 310 is arranged, for example, along the "vertical direction" in the drawing, and the second part 320 is arranged, for example, along the "horizontal direction" in the drawing, and the two second parts 320 are respectively connected to both sides of the first part 310 and are arranged oppositely, thereby forming a structure substantially in the shape of a "cross". Among them, the first part 30 and the second part 320 may be fixedly connected by, for example, welding. In some embodiments, the first part 310 and the second part 320 may also be an integral structure, and this embodiment is not limiting. Specifically, in this embodiment, the width of the first part 310 may be greater than the width of the second part 320, that is, the first part 310 can be regarded as the "main key" of the assembly key 300. In some embodiments, according to different assembly positioning requirements, when the assembly key 300 adopts a "cross"-shaped design, the width of the first part 310 may also be equal to or less than the width of the second part 320.

[0061] As Figure 2 As shown, based on the "cross"-shaped structure design of the assembly key 300, in an embodiment of the present disclosure, the first assembly plane 101 is divided into four third regions by the first key slot 102 in the shape of a "cross". In other words, the second assembly plane 201 can also be divided into four regions by the second key slot 203 in the shape of a "cross", specifically, for example, dividing the above-mentioned first region 2011 into four regions. On this basis, the connecting piece may include a first connecting piece (such as the above-mentioned first bolt 410), and the first connecting piece can be divided into four groups, and the four groups of first connecting pieces are respectively arranged in the four third regions. Through the above design, the present disclosure avoids the connecting piece from being arranged at the position of the assembly key 300 to avoid structural interference. And when the steering arm 200 includes a reinforcing rib 230 and the reinforcing rib 230 is arranged corresponding to the second key slot 203, the present disclosure can also stagger the connecting piece and the reinforcing rib 230. At the same time, for the "cross"-shaped key-key slot design, the present disclosure can optimize the installation position of the connecting piece, ensure that the connecting piece is arranged in each small region of the butt joint surface divided thereby, overcome the problem that the connecting piece is subjected to large force during steering, extend the service life of the connecting piece, and improve safety and reliability.

[0062] As Figure 2As shown, based on the design where four third regions of the first assembly plane 101 are respectively arranged with four groups of first connectors, in an embodiment of the present disclosure, each group of first connectors may include at least two (for example, but not limited to, two as shown in the drawings) first connectors. Through the above structural design, the present disclosure can further improve the connection strength between the steering knuckle 100 and the steering arm 200. Moreover, the number of each group of first connectors can be equal, whereby the connection effect between the steering knuckle 100 and the steering arm 200 at each position can be made more uniform. In some embodiments, each group of first connectors may also include only one first connector, and this embodiment is not limiting.

[0063] It should be noted here that the suspension steering mechanisms shown in the drawings and described in this specification are merely several examples of the many suspension steering mechanisms that can adopt the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the suspension steering mechanisms shown in the drawings or described in this specification.

[0064] In summary, the suspension steering mechanism proposed by the present disclosure includes a steering knuckle 100, a steering arm 200, an assembly key 300, and connectors. The steering knuckle 100 has a first assembly plane 101, and the first assembly plane 101 is provided with a first keyway 102. The steering arm 200 has a second assembly plane 201, and the second assembly plane 201 is provided with a second keyway 203; the steering knuckle 100 and the steering arm 200 are assembled via the first assembly plane 101 and the second assembly plane 201, and the first keyway 102 and the second keyway 203 are arranged opposite to each other. There is an angle A greater than 90° and less than 180° between the second assembly plane 201 and the steering plane 202 of the suspension steering mechanism. The assembly key 300 is received in the first keyway 102 and the second keyway 203. The connectors are connected to the first assembly plane 101 and the second assembly plane 201. Through the above design, the present disclosure changes the structures of the steering knuckle 100 and the steering arm 200, optimizes the contact surface structure between the steering knuckle 100 and the steering arm 200, and connects the steering knuckle 100 and the steering arm 200 through the assembly key 300 and the connectors, solving the problem of stress concentration existing during the operation of non-road mining dump trucks, ensuring the effective connection of the connectors, and improving the reliability and stability of the mining truck steering system.

[0065] Based on the above detailed description of several exemplary embodiments of the suspension steering mechanism proposed by the present disclosure, the following will describe an exemplary embodiment of the non-road mining dump truck proposed by the present disclosure.

[0066] In an embodiment of the present disclosure, the non-road mining dump truck proposed by the present disclosure includes the suspension steering mechanism proposed by the present disclosure and described in detail in the above embodiments.

[0067] It should be noted here that the off-highway mining dump trucks shown in the drawings and described in this specification are only a few examples of the many off-highway mining dump trucks that can adopt the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the off-highway mining dump trucks shown in the drawings or described in this specification.

[0068] In summary, for the off-highway mining dump truck proposed by the present disclosure, by adopting the suspension steering mechanism proposed by the present disclosure, the problem of stress concentration existing in the operation process of the off-highway mining dump truck is solved, the effective connection of the connecting parts is ensured, and the reliability and stability of the mining truck steering system are improved.

[0069] The above has described and / or illustrated in detail the exemplary embodiments of the suspension steering mechanism and the off-highway mining dump truck proposed by the present disclosure. However, the embodiments of the present disclosure are not limited to the specific embodiments described herein. On the contrary, each component and / or step of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be combined with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a", "one" and "above-mentioned", etc. are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. In addition, the terms "first" and "second", etc. in the claims and the specification are only used as labels and are not numerical limitations on their objects.

[0070] Although the suspension steering mechanism and the off-highway mining dump truck proposed by the present disclosure have been described according to different specific embodiments, those skilled in the art will recognize that changes can be made to the implementation of the present disclosure within the spirit and scope of the claims.

Claims

1. A suspension steering mechanism for an off-road mining dump truck, characterized in that: Including steering knuckle, steering arm, assembly key and connecting parts; The steering knuckle has a first assembly plane, and the first assembly plane is provided with a first keyway; The steering arm has a second assembly plane, and the second assembly plane is provided with a second keyway; the steering knuckle and the steering arm are assembled via the first assembly plane and the second assembly plane, and the first keyway and the second keyway are arranged oppositely; the second assembly plane and the steering plane of the suspension steering mechanism have an angle greater than 90° and less than 180°; The assembly key is accommodated in the first keyway and the second keyway; The connecting member is connected to the first assembly plane and the second assembly plane.

2. The suspension steering mechanism according to claim 1, characterized in that: The included angle between the second assembly plane and the steering plane is 100° to 150°.

3. The suspension steering mechanism according to claim 1, characterized in that: The steering arm comprises a first arm and a second arm, the first arm is bent and connected to the second arm, a side surface of the first arm facing the steering knuckle is the second assembly plane, and the second arm is arranged parallel to the above steering plane.

4. The suspension steering mechanism according to claim 3, characterized in that: The steering arm further comprises a reinforcing rib, wherein the reinforcing rib is connected to a side surface of the first arm facing away from the steering knuckle and the second arm.

5. The suspension steering mechanism according to claim 4, characterized in that: A reference plane parallel to the first assembly plane and the second assembly plane is defined, on which the orthographic projection of the reinforcing rib at least partially overlaps with the orthographic projection of the assembly key.

6. The suspension steering mechanism according to claim 3, characterized in that: The second assembly plane has a first area and a second area, the first area is an area that does not overlap with the orthographic projection of the second arm on a reference plane, and the second area is an area that overlaps with the orthographic projection of the second arm, and the reference plane is parallel to the first assembly plane and the second assembly plane; the second keyway is arranged in the first area; wherein the connecting member is a bolt, and the bolt includes a first bolt and a second bolt, the first bolt is located in the first area, and the second bolt is located in the second area; the first arm is provided with a first through hole in the first area, and a first threaded hole is provided at a portion of the first assembly plane corresponding to the first area, the first bolt is penetrated through the first through hole and screwed to the first threaded hole; the first arm is provided with a second threaded hole in the second area, and the second threaded hole is partially located in the second arm, and a second through hole is provided at a portion of the first assembly plane corresponding to the second area, the second bolt is penetrated through the second through hole and screwed to the second threaded hole.

7. The suspension steering mechanism according to claim 1, characterized in that: The assembly key is in a cross shape, the first keyway is in a cross shape, and the second keyway is in a cross shape.

8. The suspension steering mechanism according to claim 7, characterized in that: The first assembly plane is divided into four third areas by the first keyway; wherein the connecting member includes a first connecting member, the first connecting member is divided into four groups, and the four groups of the first connecting members are respectively arranged in the four third areas.

9. The suspension steering mechanism according to claim 8, characterized in that: Each group of the first connecting members includes at least two first connecting members.

10. An off-road mining dump truck, characterized in that: It comprises the suspension steering mechanism as described in any one of claims 1 to 9.

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