A shaft seat and shaft cover structure for rigid suspension

Abstract

The utility model relates to a kind of shaft seat and shaft cover structure for rigid suspension in the technical field of engineering machinery suspension system, comprising: welding mounting seat;Two cast shaft seat bodies, two the cast shaft seat bodies are coaxially arranged, and are respectively welded in the lower two end portions of welding mounting seat;Two cast shaft covers, are one-to-one correspondingly buckled in the lower cast shaft seat body, and are connected with welding mounting seat by screw rod group;Rubber bushing, coaxially embedded the inside of cast shaft seat body and cast shaft cover;The utility model has adopted the hybrid structure of "welding combination". For the core component with complex shape and high stress requirement, casting process is used to ensure its structural strength and complex curved surface form;And for mounting seat, reinforcing plate and other support structures, steel plate welding forming is used;Avoid the overall casting of large workpiece, greatly reduce the mold cost and complexity, especially suitable for small and medium batch production.

Description

Technical Field

[0001] This utility model relates to the field of suspension system technology for engineering machinery, and in particular to a bearing and cover structure for rigid suspension. Background Technology

[0002] In heavy-duty transportation sectors such as mining and construction, trailers typically employ rigid balance beam suspension systems. This system connects the front and rear axles via a balance beam. When the vehicle travels on uneven surfaces, the balance beam can swing around its central pivot point to maintain good contact between the wheels of each axle and the ground, thereby distributing the load and improving ride comfort. In this suspension system, the axle mounts and caps used to install the balance beam's transverse axle are critical load-bearing components; their structural strength and reliability directly affect the safety and stability of the entire vehicle.

[0003] Currently, the rigid suspension axle seats and caps for these mining trailers on the market are mostly formed by integral casting. However, for large workpieces, this forming method results in high mold costs. Especially when the production batch is small, the mold cost per unit is significant, leading to high overall material and manufacturing costs, which is not conducive to enterprises reducing production costs.

[0004] To address this, we designed a rigid suspension bearing and cover structure. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a shaft seat and shaft cover structure for rigid suspension.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A rigid suspension axle seat and axle cap structure, comprising: Welded mounting base; Two cast shaft seats are coaxially arranged and welded to the two lower ends of the welded mounting base, respectively. Two cast shaft caps are fastened to the bottom of the cast shaft seat body in a corresponding manner and connected to the welded mounting base by a screw assembly; A rubber bushing is coaxially embedded inside the cast shaft seat and the cast shaft cover.

[0007] Furthermore, the welded mounting base includes: roof; Two support plates are welded to the lower surface of the top plate at intervals along the width direction of the top plate, and each support plate has a notch in the middle of its lower side. Two screw support plates are welded to the outer surfaces of two support plates respectively, and the two screw support plates are located on the same horizontal plane. Each screw support plate has a hole for the screw assembly to pass through.

[0008] Furthermore, the screw support plate is located at the middle of the outer plate surface in the height direction of the support plate.

[0009] Furthermore, a corner brace is welded between the lower surface of the top plate and the outer surface of the support plate.

[0010] Furthermore, a bearing rib is welded between the lower surface of the screw support plate and the outer surface of the support plate.

[0011] Furthermore, end reinforcement plates are welded between the same-direction sides of the two support plates and between the same-direction sides of the two notches.

[0012] Furthermore, a central reinforcing plate is provided between the bottoms of the two notches.

[0013] Furthermore, the outer surface of the cast shaft cover is provided with two sets of ribs spaced apart along its axial direction, and each set of ribs is provided with perforated ear plates at both ends.

[0014] Furthermore, both ends of the cast shaft seat and the cast shaft cover are provided with inwardly bent portions for axial positioning of the rubber bushing.

[0015] Furthermore, the screw assembly includes a rod body, and both ends of the rod body are provided with threaded sections. From the inside to the outside, a flat washer, a locking nut, and an anti-reverse nut are sequentially fitted onto the threaded sections.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. A hybrid structure combining casting and welding is adopted. For core components with complex shapes and high stress requirements, casting is used to ensure their structural strength and complex curved surface forms; while for supporting structures such as mounting bases and reinforcing plates, steel plates are welded together. This design avoids the integral casting of large workpieces, greatly reducing mold costs and complexity, and is particularly suitable for small and medium batch production. It achieves the best balance between cost and performance while ensuring product rigidity and strength. 2. The welded mounting base forms a high-rigidity frame system through multiple reinforcement structures such as corner braces, axle seat ribs, end reinforcement plates, and middle reinforcement plates. This design significantly enhances the overall bending, torsion, and impact resistance of the mounting base, effectively withstanding the complex alternating loads generated by mining trailers under heavy loads and harsh road conditions, thus improving the reliability and service life of the suspension system. 3. By decomposing the overall structure into castings and welded parts, each part can be processed in parallel. Castings focus on forming complex curved surfaces, while welded parts are manufactured quickly using flexible processes such as blanking and welding. Compared with the traditional overall casting process, this concurrent engineering model significantly shortens the product manufacturing cycle, which is conducive to enterprises responding quickly to market demands and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the welded mounting base and the cast shaft seat in this utility model; Figure 3 This is a schematic diagram of the structure of the cast shaft cover in this utility model; Figure 4 This is a schematic diagram of the screw assembly in this utility model; Figure 5 This is a schematic diagram of the structure of the rubber bushing in this utility model.

[0018] In the diagram: 1. Welded mounting base; 11. Top plate; 12. Support plate; 121. Notch; 13. Screw support plate; 14. Angle brace plate; 15. Shaft seat rib; 16. End reinforcing plate; 17. Middle reinforcing plate; 2. Cast shaft seat body; 3. Cast shaft cover; 31. Rib; 32. Ear plate with hole; 4. Screw assembly; 41. Rod body; 42. Flat washer; 43. Locking nut; 44. Anti-reverse nut; 5. Rubber bushing. Detailed Implementation

[0019] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0020] Example 1, in conjunction with Appendix Figure 1-5 A rigid suspension bearing and cover structure includes a bearing, a cast bearing cover 3, a screw assembly 4 and a rubber bushing 5, wherein the bearing includes a welded mounting base 1 and a cast bearing body 2 welded to its lower two ends.

[0021] The welded mounting base 1 serves as the installation foundation for the entire structure, and is fixed to the trailer's frame beam by welding its top plate 11. The welded mounting base 1 is a frame structure welded from multiple steel plates, specifically including: Top plate 11 is a rectangular steel plate; its upper surface is used for welding to the frame box girder during use.

[0022] There are two support plates 12, which are perpendicularly welded to the lower surface of the top plate 11, parallel to the width direction and spaced at a certain distance. Each support plate 12 has a notch 121 in the middle of its lower side.

[0023] Two screw support plates 13 are vertically welded to the outer surfaces of the two support plates 12, and the two screw support plates 13 are kept at the same horizontal height. Each screw support plate 13 has a hole for mounting the screw assembly 4.

[0024] In this embodiment, the screw support plate 13 has four holes, which are respectively located at the two ends of the cast shaft seat 2.

[0025] Multiple corner braces 14 are provided, and the exact number is determined based on actual needs and is not limited here. The corner braces 14 are welded to the angle between the lower surface of the top plate 11 and the outer surface of the support plate 12 to enhance the connection rigidity and strength between the top plate 11 and the support plate 12.

[0026] Shaft seat ribs 15: There are multiple ribs, and the specific number is set according to actual needs and is not limited here. The shaft seat ribs 15 are welded between the lower plate surface of the screw support plate 13 and the outer plate surface of the support plate 12 to enhance the support rigidity and stability of the screw support plate 13.

[0027] The end reinforcing plate 16 is welded between the two ends of the two support plates 12 and between the same-direction sides of the notch 121 of the two support plates 12 to form a vertical reinforcing rib, thereby enhancing the torsional resistance of the entire mounting frame.

[0028] A central reinforcing plate 17 is welded between the bottoms of the two notches 121 to further strengthen the rigidity of the weak area in the middle of the two support plates 12.

[0029] There are two cast shaft seat bodies 2, which are coaxially arranged and welded to the two ends below the welded mounting base 1, located on both sides of the notch 121. The inner ends of the cast shaft seat bodies 2 are provided with inward bending portions for axial positioning of the rubber bushing 5.

[0030] Two cast shaft caps 3 are provided, and their inner wall shapes match the curved surface of the lower half of the cast shaft seat 2. The cast shaft caps 3 can be fastened to the bottom of the cast shaft seat 2 one by one, and the two together form a complete shaft hole for accommodating the rubber bushing 5. The inner sides of both ends of the cast shaft caps 3 are also provided with inward bending portions, which cooperate with the cast shaft seat 2 to achieve reliable axial positioning of the rubber bushing 5.

[0031] To further strengthen the structure, two sets of ribs 31 are provided on the outer side of the cast shaft cover 3 at intervals along its axial direction. Each set of ribs 31 extends at both ends to form perforated ear plates 32 for passing through the screw assembly 4.

[0032] The rubber bushing 5 is coaxially embedded in the shaft hole formed by the cast shaft seat 2 and the cast shaft cover 3. Its function is to absorb the vibration and impact generated during vehicle operation, while compensating for assembly tolerances and ensuring uniform distribution of clamping force.

[0033] The screw assembly 4 includes a rod body 41, a flat washer 42, a locking nut 43, and a backlash nut 44. The rod body 41 has threaded sections at both ends. During assembly, the rod body 41 passes sequentially through a hole in a screw support plate 13 and a corresponding hole in the perforated lug plate 32 on the cast shaft cover 3. Then, the flat washer 42, locking nut 43, and backlash nut 44 are sequentially fitted onto the threaded sections at both ends, from the inside out. Tightening the locking nut 43 generates a large axial preload, firmly pressing the cast shaft cover 3 onto the cast shaft seat 2, and finally locking it in place with the backlash nut 44 to prevent loosening.

[0034] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A rigid suspension bearing and cap structure, characterized in that, include: Welded mounting base (1); Two cast shaft seats (2) are coaxially arranged and welded to the two ends below the welded mounting base (1); Two cast shaft caps (3) are fastened to the bottom of the cast shaft seat (2) in a corresponding manner, and are connected to the welded mounting base (1) by a screw assembly (4); The rubber bushing (5) is coaxially embedded inside the cast shaft seat (2) and the cast shaft cover (3).

2. The axle seat and axle cover structure for rigid suspension according to claim 1, characterized in that: The welded mounting base (1) includes: Top plate (11); Two support plates (12) are welded to the lower surface of the top plate (11) at intervals along the width direction of the top plate (11), and each support plate (12) has a notch (121) in the middle of its lower side. Two screw support plates (13) are welded to the outer surfaces of two support plates (12) respectively, and the two screw support plates (13) are located on the same horizontal plane. Each screw support plate (13) has a hole for the screw assembly (4) to pass through.

3. The axle seat and axle cover structure for rigid suspension according to claim 2, characterized in that: The screw support plate (13) is located at the middle of the outer plate surface of the support plate (12) in the height direction.

4. The axle seat and axle cover structure for rigid suspension according to claim 2, characterized in that: An angle brace plate (14) is welded between the lower surface of the top plate (11) and the outer surface of the support plate (12).

5. The axle seat and axle cover structure for rigid suspension according to claim 2, characterized in that: A bearing rib (15) is welded between the lower plate surface of the screw support plate (13) and the outer plate surface of the support plate (12).

6. The axle seat and axle cover structure for rigid suspension according to claim 2, characterized in that: End reinforcement plates (16) are welded between the same-direction sides of the two support plates (12) and between the same-direction sides of the two notches (121).

7. The axle seat and axle cover structure for rigid suspension according to claim 2, characterized in that: A central reinforcing plate (17) is provided between the bottoms of the two notches (121).

8. The axle seat and axle cover structure for rigid suspension according to claim 1, characterized in that: The outer side of the cast shaft cover (3) is provided with two sets of ribs (31) spaced apart along its axial direction, and each set of ribs (31) is provided with perforated ear plates (32) at both ends.

9. The axle seat and axle cover structure for rigid suspension according to claim 1, characterized in that: Both ends of the cast shaft seat (2) and the cast shaft cover (3) are provided with inward bending parts for axial positioning of the rubber bushing (5).

10. The axle seat and axle cover structure for rigid suspension according to claim 1, characterized in that: The screw assembly (4) includes a rod body (41), and both ends of the rod body (41) are provided with threaded sections. The threaded sections are fitted with a flat washer (42), a locking nut (43) and an anti-reverse nut (44) from the inside to the outside.

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