Novel lower steering shaft supporting plate damping structure

Abstract

The invention belongs to the technical field of automobile steering transmission devices, and particularly relates to a novel lower steering shaft supporting plate damping structure of a heavy truck. The invention provides a novel lower steering shaft supporting plate damping structure capable of further reducing shaking of a steering wheel. The device comprises a bearing assembly, the bearing assembly is connected with a supporting plate assembly, a transmission shaft penetrates through the bearing assembly and the supporting plate assembly, and the device is characterized in that the supporting plate assembly comprises a connecting part connected with the bearing assembly and a damping part connected with the connecting part, and a fixing hole is formed in the surface of the damping part; a rubber damping sleeve with the outer surface matched with the fixing hole is arranged in the fixing hole, a mounting hole is formed in the rubber damping sleeve, and a supporting sleeve is arranged in the mounting hole.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile steering transmission devices, and in particular relates to a novel lower steering shaft support plate shock-absorbing structure for heavy trucks. Background Art

[0002] At present, there are generally three structural forms of steering drive shaft assemblies used on heavy-duty trucks: one steering drive shaft assembly is directly connected to the steering gear; there are two steering drive shaft assemblies, namely the upper steering drive shaft assembly is connected to the lower steering drive shaft assembly, and then connected to the steering gear through the lower steering drive shaft assembly, and there is a support plate support structure on the lower steering drive shaft assembly; there are three steering drive shaft assemblies, namely the upper steering drive shaft assembly is connected to the middle steering drive shaft assembly and the lower steering drive shaft assembly, and then connected to the steering gear through the lower steering drive shaft assembly, and there is a support plate support structure on the middle steering drive shaft assembly.

[0003] Currently, of the two steering drive shaft assemblies with support plate structures, only the bearing assembly mounted on the steering drive shaft has a shock-absorbing bearing sleeve structure, which reduces vibration transmission between the steering wheel and the steering gear. Due to the driving environment of heavy trucks, the vibration transmission between the steering wheel and the steering gear is relatively large. This unrelieved vibration transmission causes steering wheel vibration, which can cause discomfort and increase driver fatigue. Summary of the Invention

[0004] The present invention aims to solve the above problems and provides a novel lower steering shaft support plate shock-absorbing structure that can further reduce steering wheel vibration.

[0005] In order to achieve the above-mentioned purpose of the present invention, the present invention adopts the following technical solution, which includes a bearing assembly, the bearing assembly is connected to the support plate assembly, and a transmission shaft passes through the bearing assembly and the support plate assembly, and is characterized in that: the support plate assembly includes a connecting portion connected to the bearing assembly and a shock-absorbing portion connected to the connecting portion, a fixing hole is provided on the surface of the shock-absorbing portion, a rubber shock-absorbing sleeve whose outer surface matches the fixing hole is provided in the fixing hole, a mounting hole is provided in the rubber shock-absorbing sleeve, and a support sleeve is provided in the mounting hole.

[0006] As a preferred solution of the present invention, a flat washer is provided on one end surface of the rubber shock-absorbing sleeve through grease glue.

[0007] Furthermore, the rubber shock-absorbing sleeve is a cylindrical structure, and a mounting groove cooperating with the shock-absorbing part is provided in the middle of the outer surface of the cylinder; the flat washer is bonded to the end face of the cylinder.

[0008] Furthermore, the area of the flat washer is greater than or equal to the end surface area of the cylinder.

[0009] As another preferred embodiment of the present invention, a receiving groove for cooperating with the support sleeve is provided in the mounting hole of the rubber shock-absorbing sleeve, and an inlet structure with a diameter smaller than that of the receiving groove is provided at the upper and lower openings of the mounting hole.

[0010] Furthermore, a chamfer is provided at the edge of the inlet structure to facilitate the introduction of the support sleeve into the receiving groove.

[0011] Furthermore, a notch communicating the fixing hole and the outside of the shock-absorbing part is provided on the shock-absorbing part.

[0012] Even further, the notch forms a certain angle with both the axial direction and the radial direction of the transmission shaft, and the notch and the fixing hole are not perpendicular to the surface of the shock-absorbing part; the width of the notch is smaller than the inner diameter of the support sleeve; two fixing holes are provided, and the two fixing holes are respectively connected to the two notches; the two notches are not parallel to each other.

[0013] As a third preferred embodiment of the present invention, the bearing assembly includes a bearing cover, a shock-absorbing bearing sleeve is provided inside the bearing cover, a bearing body is provided inside the shock-absorbing bearing sleeve, the transmission shaft is provided inside the bearing body, and a retaining ring for fixing the bearing body is provided on the transmission shaft; the open end of the bearing cover is connected to the connecting part of the support plate.

[0014] As a fourth preferred embodiment of the present invention, one end of the transmission shaft is connected to the first coupling assembly, and a connecting end for connecting the steering transmission shaft assembly is provided on the first coupling assembly; the other end of the transmission shaft is connected to the second coupling assembly, and a connecting end for connecting the steering gear is provided on the second coupling assembly.

[0015] Advantages of the present invention: By providing a rubber shock-absorbing sleeve, a support sleeve and a flat washer on the support plate, the present invention effectively isolates the vibration of the steering transmission shaft assembly in the axial and radial directions, and further reduces the steering wheel jitter problem.

[0016] Compared with the existing traditional solution that only relies on the shock-absorbing structure of the bearing sleeve, the present invention adds a primary buffer structure, thereby improving driving comfort.

[0017] In addition, through the notch design on the support plate, the present invention is easy to install. In cooperation with the support sleeve and the installation structure with multiple angles, it can also prevent the rubber shock-absorbing sleeve from slipping off and failing during use. And through the reasonable contact area design between the flat washer and the vehicle chassis bracket, it ensures that the rubber shock-absorbing sleeve is evenly stressed and avoids local damage, thereby significantly improving the durability and shock-absorbing effect of the shock-absorbing structure and having good prospects for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention.

[0019] Figure 2 isFigure 1 BB cross-sectional view.

[0020] Figure 3 yes Figure 1 AA cross-sectional view.

[0021] In the accompanying drawings, 1 is the connecting end of the steering transmission shaft assembly, 2 is the first coupling, 3 is the bearing component, 31 is the bearing cover, 32 is the shock-absorbing bearing sleeve, 33 is the bearing body, 34 is the retaining ring, 4 is the support plate component, 41 is the shock-absorbing part, 42 is the rubber shock-absorbing sleeve, 43 is the mounting hole, 44 is the notch, 45 is the connecting part, 46 is the support sleeve, 47 is the mounting groove, 48 is the accommodating groove, 49 is the flat washer, 410 is the chamfer, 411 is the fixing hole, 5 is the transmission shaft, 6 is the second coupling, and 7 is the steering machine connecting end. DETAILED DESCRIPTION

[0022] The present invention includes a bearing assembly 3, which is connected to a support plate assembly 4. A transmission shaft 5 passes through the bearing assembly 3 and the support plate assembly 4. The support plate assembly 4 includes a connecting portion 45 connected to the bearing assembly 3 and a shock-absorbing portion 41 connected to the connecting portion 45. The surface of the shock-absorbing portion 41 is provided with a fixing hole 411. The fixing hole 411 is provided with a rubber shock-absorbing sleeve 42 whose outer surface cooperates with the fixing hole 411. The rubber shock-absorbing sleeve 42 is provided with a mounting hole 43, and the mounting hole 43 is provided with a support sleeve 46. By providing the rubber shock-absorbing sleeve 42 in the fixing hole 411 of the shock-absorbing portion 41 and the support sleeve 46 structure therein, the vibration and impact generated by the operation of the transmission shaft 5 can be effectively alleviated, achieving a good shock-absorbing effect, and effectively improving the stability of the steering wheel and driving comfort.

[0023] A flat washer 49 is provided on one end surface of the rubber shock-absorbing sleeve 42 through grease glue. The flat washer 49 contacts the vehicle chassis, which can effectively protect the rubber shock-absorbing sleeve 42 and increase the service life of the rubber shock-absorbing sleeve 42.

[0024] The rubber shock-absorbing sleeve 42 is cylindrical in structure, with a mounting groove 47 in the middle of the outer surface of the cylinder, which cooperates with the shock-absorbing portion 41. The flat washer 49 is bonded to the end face of the cylinder. The mounting hole 43 of the rubber shock-absorbing sleeve 42 is provided with a receiving groove 48, which cooperates with the support sleeve 46. The upper and lower openings of the mounting hole 43 are provided with an entrance structure with a diameter smaller than that of the receiving groove 48. The edge of the entrance structure is provided with a chamfer 410 to facilitate the introduction of the support sleeve 46 into the receiving groove 48. The cylindrical rubber shock-absorbing sleeve 42 cooperates with the shock-absorbing portion 41 through the mounting groove 47, creating a stable connection structure and ensuring the long-term and effective operation of the shock-absorbing structure. The receiving groove 48 and the locking entrance structure effectively prevent the support sleeve 46 from falling out during operation, and have strong resistance to vibration and impact.

[0025] A notch 44 communicating with the fixing hole 411 and the outside of the shock-absorbing part 41 is provided on the shock-absorbing part 41; since the support plate structure of the present invention cannot vulcanize the rubber shock-absorbing sleeve 42 efficiently in the fixing hole 411 of the support plate, two notches 44 for loading are punched on the support plate to facilitate the installation of the rubber shock-absorbing sleeve 42.

[0026] The notch 44 forms a certain angle with both the axial direction and the radial direction of the transmission shaft 5; the width of the notch 44 is smaller than the inner hole diameter of the support sleeve 46.

[0027] Two fixing holes 411 are provided, and the two fixing holes 411 are respectively connected to the two notches 44; the two notches 44 are arranged non-parallel to each other.

[0028] As Figure 1 shown, the notch 44 forms certain angles α and β with the axial direction and the radial direction of the steering transmission shaft 5. The notch 44 and the fixing hole 411 are not perpendicular to the surface of the shock-absorbing part 41 and are processed at a certain angle. The size of the notch 44 is smaller than the diameter of the fixing bolt used to connect the support plate and the vehicle chassis bracket, so as to ensure that the rubber shock-absorbing sleeve 42 cannot fall off and fail during the axial and radial vibrations of the steering transmission shaft 5; two notches 44 punched on the support plate also form a certain angle γ, so that the installation of the two rubber shock-absorbing sleeves 42 can also offset some vibrations of the lower steering transmission shaft 5 assembly caused by the vibration transmission from the vehicle chassis bracket and the steering gear. Therefore, the notch 44 and the fixing hole 411 structure of the present invention can greatly reduce the vibration of the steering wheel, thereby increasing customer satisfaction.

[0029] The bearing assembly 3 includes a bearing cover 31. A shock-absorbing bearing sleeve 32 is arranged inside the bearing cover 31, and a bearing body 33 is arranged inside the shock-absorbing bearing sleeve 32. The transmission shaft 5 is arranged inside the bearing body 33, and a retaining ring 34 for fixing the bearing body 33 is arranged on the transmission shaft 5; one open end of the bearing cover 31 is connected to the connecting part 45 of the support plate. The shock-absorbing bearing sleeve 32 and the bearing body 33 are arranged inside the bearing cover 31, which can reduce the vibration transmission of the transmission shaft 5 during operation. At the same time, the retaining ring 34 structure is used to ensure the stable positioning of the bearing body 33, thereby improving the running smoothness and reliability of the steering system.

[0030] One end of the transmission shaft 5 is connected to the first coupling 2 assembly, and a connecting end 1 of the steering transmission shaft 5 assembly is arranged on the first coupling 2 assembly; the other end of the transmission shaft 5 is connected to the second coupling 6 assembly, and a steering gear connecting end 7 is arranged on the second coupling 6 assembly.

[0031] Embodiment: The structure of the present invention is as Figure 1 shown: The support plate assembly 4: A plate body composed of four parts, namely a support sleeve 46, a rubber shock-absorbing sleeve 42, a flat washer 49, a connecting part 45 and a shock-absorbing part, is assembled into the component support plate assembly 4 according to requirements.

[0032] The connecting part 45 of the component support plate assembly 4 and the component bearing assembly 3 in the steering drive shaft 5 assembly are fixed together by bolts and nuts; the shock-absorbing part 41 and the vehicle chassis bracket are fixed together by bolts and nuts.

[0033] The structure of the support plate assembly 4 has a shock-absorbing effect, and together with the bearing assembly 3, the two components eliminate the jitter on the steering wheel caused by the vibration of the vehicle chassis.

[0034] Two rubber shock-absorbing sleeves 42 are installed on the shock-absorbing part 41 and are respectively pressed into the two fixing holes 411 of the shock-absorbing part 41. Then, two support sleeves 46 are respectively installed into the installation holes 43 of the two rubber shock-absorbing sleeves 42. Finally, two flat washers 49 are respectively bonded to the surfaces of the two rubber shock-absorbing sleeves 42 with strong grease glue, and they are firmly fixed and not easy to fall off or be damaged.

[0035] Two support sleeves 46 are respectively installed into the installation holes 43 of the two rubber shock-absorbing sleeves 42. Since the installation holes 43 of the rubber shock-absorbing sleeves 42 have internal sinking platforms, it can prevent the support sleeves 46 from coming out; the length of the support sleeve 46 < the thickness of the rubber shock-absorbing sleeve 42. When the support plate assembly 4 is firmly fixed by bolts and nuts, the rubber shock-absorbing sleeve 42 is made of NBR material and has elasticity. When it is compressed by a certain amount, the support sleeve 46 plays a supporting and fixing role.

[0036] Two flat washers 49 are respectively bonded to the surfaces of the two rubber shock-absorbing sleeves 42 with strong grease glue, and they are firmly fixed and not easy to fall off.

[0037] One end of the support plate assembly 4 is firmly fixed to the vehicle chassis bracket by bolts and nuts. Since the plane of the two fixing points of the vehicle chassis bracket is smaller than the lower plane of the two rubber shock-absorbing sleeves 42, when fixing the support plate assembly 4, only the middle part of the lower plane of the two rubber shock-absorbing sleeves 42 will be severely compressed and deformed or even damaged, resulting in a significant reduction in the shock-absorbing effect of this structure. The solution is to make the two flat washers 49 bonded to the lower surfaces of the two rubber shock-absorbing sleeves 42 contact the plane of the two fixing points of the vehicle chassis bracket. The upper and lower planes of the flat washer 49 of the present invention ≥ the lower plane of the rubber shock-absorbing sleeve 42. In this way, when the support plate assembly 4 is fixed, the two rubber shock-absorbing sleeves 42 will be evenly compressed and deformed, and their elastic shock-absorbing effect is the best.

[0038] During assembly, first, two rubber shock-absorbing sleeves 42 are respectively pressed into the two fixing holes 411 of the shock-absorbing part 41 through the notches 44. Then, two support sleeves 46 are respectively installed into the installation holes 43 of the two rubber shock-absorbing sleeves 42. Finally, two flat washers 49 are respectively bonded to the surfaces of the two rubber shock-absorbing sleeves 42 with strong grease glue.

[0039] It should be understood that the above specific description of the present invention is only for the purpose of illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirements are met, they are all within the protection scope of the present invention.

Claims

1. A novel shock-absorbing structure for a lower steering shaft support plate, comprising a bearing assembly (3), the bearing assembly (3) being connected to a support plate assembly (4), a transmission shaft (5) passing through the bearing assembly (3) and the support plate assembly (4), characterized in that: The said support plate assembly (4) includes a connecting portion (45) connected to the bearing assembly (3) and a shock-absorbing portion (41) connected to the connecting portion (45). A fixing hole (411) is provided on the surface of the shock-absorbing portion (41). A rubber shock-absorbing sleeve (42) with an outer surface matching the fixing hole (411) is arranged in the fixing hole (411). An installation hole (43) is arranged in the rubber shock-absorbing sleeve (42), and a support sleeve (46) is arranged in the installation hole (43).

2. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 1, characterized in that: A flat washer (49) is arranged on one end face of the said rubber shock-absorbing sleeve (42) through grease glue.

3. A novel shock-absorbing structure for a lower steering shaft support plate according to claim 2, characterized in that: The said rubber shock-absorbing sleeve (42) is of a cylindrical structure. An installation groove (47) matching the shock-absorbing portion (41) is arranged in the middle of the outer surface of the cylinder; the flat washer (49) is bonded to the end face of the cylinder.

4. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 3, characterized in that: The area of the said flat washer (49) ≥ the area of the end face of the cylinder.

5. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 1, characterized in that: A receiving groove (48) matching the support sleeve (46) is arranged in the installation hole (43) of the said rubber shock-absorbing sleeve (42). Entrance structures with diameters smaller than that of the receiving groove (48) are arranged at the upper and lower openings of the installation hole (43).

6. A novel shock-absorbing structure for a lower steering shaft support plate according to claim 5, characterized in that: A chamfer (410) facilitating the introduction of the support sleeve (46) into the receiving groove (48) is arranged at the edge of the said entrance structure.

7. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 5, characterized in that: A notch (44) communicating the fixing hole (411) and the outside of the shock-absorbing portion (41) is arranged on the said shock-absorbing portion (41).

8. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 7, characterized in that: The said notch (44) forms a certain angle with both the axial and radial directions of the transmission shaft (5). The notch (44) and the fixing hole (411) are not arranged perpendicular to the surface of the shock-absorbing portion (41); the width of the notch (44) is smaller than the inner hole diameter of the support sleeve (46); two fixing holes (411) are arranged, and the two fixing holes (411) are respectively connected to the two notches (44); the two notches (44) are not parallel to each other.

9. A novel shock-absorbing structure for a lower steering shaft support plate according to claim 1, characterized in that: The said bearing assembly (3) includes a bearing cover (31). A shock-absorbing bearing sleeve (32) is arranged in the bearing cover (31). A bearing body (33) is arranged in the shock-absorbing bearing sleeve (32). The transmission shaft (5) is arranged in the bearing body (33), and a retaining ring (34) for fixing the bearing body (33) is arranged on the transmission shaft (5); the open end of the bearing cover (31) is connected to the connecting portion (45) of the said support plate.

10. A novel shock-absorbing structure for the lower steering shaft support plate according to claim 1, characterized in that: One end of the said transmission shaft (5) is connected to the first coupling (2) assembly. A connecting end (1) of the steering transmission shaft (5) assembly is arranged on the first coupling (2) assembly; the other end of the transmission shaft (5) is connected to the second coupling (6) assembly. A steering gear connecting end (7) is arranged on the second coupling (6) assembly.

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