A directional machine steering shaft universal joint anti-wear structure

Abstract

The utility model relates to a kind of direction machine steering shaft universal joint anti-abrasion structure, including steering shaft, the both ends of steering shaft are provided with first link part, second link part is arranged between first link part, the left and right sides of short shaft rod first link part are fixedly connected with the one end of second link part and are connected with first connecting shaft, two first connecting shafts are provided with needle roller bearing part between, the inside of needle roller bearing part is provided with pivot slot, two first connecting shafts and first link part between are provided with first bearing, the left and right sides of second link part are connected with second connecting shaft, the one end of two second connecting shafts is fixedly connected with spherical head, and the second bearing is arranged between the one end of two second connecting shafts and second link part;By changing the cross shaft head end portion into spherical head structure, point contact is formed with the plane of needle roller bearing, replace traditional surface contact, this design significantly reduces rotating friction, reduces no-load torque.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-wear structure for universal joint of steering gear, and in particular to an anti-wear structure for universal joint of steering gear. Background Technology

[0002] Spherical plain bearings are a type of spherical sliding bearing. Their sliding contact surfaces consist of an inner spherical surface and an outer spherical surface, allowing for rotation and oscillation at any angle during operation. They are manufactured using various special processes such as surface phosphating, burring, padding, and spraying. Spherical plain bearings are characterized by high load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning properties, and good lubrication. They are generally used for low-speed oscillating motions (i.e., angular motion). Due to the spherical sliding surface, they can also perform tilting motions (i.e., self-aligning motions) within a certain angle range. They can still function normally even when there is a significant misalignment between the support shaft and the housing bore. Spherical plain bearings can withstand large loads. Depending on their type and structure, they can withstand radial loads, axial loads, or combined radial and axial loads. Because composite materials are inlaid on the outer spherical surface of the inner ring, these bearings exhibit self-lubrication during operation. They are generally used for low-speed oscillating motions and low-speed rotations, and can also perform tilting motions within a certain angle range. They can still function normally even when there is a significant misalignment between the support shaft and the housing bore.

[0003] However, in the existing steering gear universal joint structure, the cross shaft connection usually wears down due to mutual contact during rotation, and the connection between the shaft end and the connecting part also wears down during rotation, shortening the service life of the universal joint structure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a wear-resistant structure for the universal joint of a steering gear steering shaft. This structure has the advantage of preventing wear during rotation and solves the problem that existing universal joint structures for steering gear steering shafts typically experience wear due to mutual contact during rotation in the cross-shaft connection method, and that the connection between the shaft end and the connecting part also wears during rotation, thus shortening the service life of the universal joint structure.

[0005] The technical solution of this utility model is as follows: a wear-resistant structure for a universal joint of a steering gear, comprising a steering shaft, with a first connecting part at each end of the steering shaft, a second connecting part between the first connecting parts, a short shaft fixedly connected to one end of the second connecting part, first connecting shafts penetratingly connected to both sides of the first connecting part, a needle roller bearing part between the two first connecting shafts, a rotating shaft groove opened inside the needle roller bearing part, a first bearing component between the two first connecting shafts and the first connecting part, a second connecting shaft penetratingly connected to both sides of the second connecting part, a ball head fixedly connected to one end of each of the two second connecting shafts, and a second bearing component between one end of each of the two second connecting shafts and the second connecting part.

[0006] Furthermore, round holes are provided on both the left and right sides of the first connecting part and the second connecting part, and oil drain grooves are provided on the inner walls of the round holes. The first connecting shaft and the second connecting shaft are respectively connected to the first connecting part and the second connecting part through the round holes.

[0007] Furthermore, first oil inlet holes are provided on both the left and right sides of the surface of the first connecting part, and there are four first oil inlet holes arranged in a vertical array.

[0008] Furthermore, two second oil inlets are provided on both the left and right sides of the surface of the second connecting part, and there are four second oil inlets arranged in a vertical array.

[0009] Furthermore, both spherical heads are inserted into the shaft groove, and point contact is formed between the two spherical heads and the plane of the needle roller bearing to reduce rotational friction.

[0010] Furthermore, the first bearing component includes a first ball bearing, which is rotatably disposed between the two first connecting shafts and the first connecting part to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

[0011] Furthermore, the second bearing component includes a second ball bearing, which is rotatably disposed between the two second connecting shafts and the second connecting part to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

[0012] The beneficial effects of this utility model are: The anti-wear structure of the universal joint of the steering gear shaft changes the end of the cross shaft to a spherical head structure, forming a point contact with the plane of the needle roller bearing, replacing the traditional surface contact. This design significantly reduces rotational friction and reduces no-load torque. Roller bearings are installed between the ends of the first and second connecting shafts and the first and second connecting parts to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement. Attached Figure Description

[0013] Figure 1This is a three-dimensional structural diagram of the anti-wear structure of the universal joint of the steering gear of this utility model; Figure 2 This is a three-dimensional side view of the wear-resistant structure of the universal joint of the steering gear of this utility model. Figure 3 This is a partially enlarged three-dimensional structural diagram of the universal joint of this utility model; Figure 4 This is a partially enlarged three-dimensional side view of the universal joint of this utility model; Figure 5 This utility model Figure 4 A magnified schematic diagram of the three-dimensional structure at point A.

[0014] In the diagram: 1. Steering shaft; 2. First connecting part; 3. Second connecting part; 4. Short shaft; 5. First oil inlet; 6. First connecting shaft; 7. Needle roller bearing part; 8. Shaft groove; 9. First ball bearing; 10. Second ball bearing; 11. Second connecting shaft; 12. Second oil inlet; 13. Spherical head. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1 This embodiment of a steering gear universal joint anti-wear structure includes a steering shaft 1, with first connecting parts 2 at both ends of the steering shaft 1, and a second connecting part 3 between the first connecting parts 2. A short shaft 4 is fixedly connected to one end of the second connecting part 3. First connecting shafts 6 are connected through the left and right sides of the first connecting parts 2. A needle roller bearing part 7 is provided between the two first connecting shafts 6. A rotating shaft groove 8 is opened inside the needle roller bearing part 7. A first bearing component is provided between the two first connecting shafts 6 and the first connecting part 2. A second connecting shaft 11 is connected through the left and right sides of the second connecting part 3. A ball head 13 is fixedly connected to one end of the two second connecting shafts 11. The two ball heads 13 are inserted into the rotating shaft groove 8. The two ball heads 13 form point contact with the plane of the needle roller bearing part 7 to reduce rotational friction. A second bearing component is provided between one end of the two second connecting shafts 11 and the second connecting part 3.

[0017] In this embodiment, by changing the connection method of the cross bearing to insert the ball head 13 into the shaft groove 8 opened inside the needle roller bearing 7 to form point contact instead of traditional surface contact, this design significantly reduces rotational friction and reduces no-load torque.

[0018] Please see Figure 3 - Figure 4 In this embodiment, round holes are provided on both the left and right sides of the first connecting part 2 and the second connecting part 3. Oil drain grooves are provided on the inner walls of the round holes. The first connecting shaft 6 and the second connecting shaft 11 are respectively connected to the first connecting part 2 and the second connecting part 3 through the round holes. The first connecting part 2 has four first oil inlet holes 5 arranged in a vertical array on both the left and right sides of its surface. The second connecting part 3 has four second oil inlet holes 12 arranged in a vertical array on both the left and right sides of its surface.

[0019] It should be noted that oil enters through the first oil inlet hole 5 and the second oil inlet hole 12, and flows out through the oil drain groove to lubricate the two first connecting shafts 6 and the two second connecting shafts 11. The lubricating oil is precisely guided to the friction surfaces of the ball head 13 and the needle roller bearing 7 through the oil outlet hole to achieve long-term lubrication.

[0020] Please see Figures 4-5 In this embodiment, the first bearing component includes a first ball bearing 9, which is rotatably disposed between the two first connecting shafts 6 and the first connecting part 2. The second bearing component includes a second ball bearing 10, which is rotatably disposed between the two second connecting shafts 11 and the second connecting part 3. This is used to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

[0021] It should be noted that a first ball bearing 9 and a second ball bearing 10 are installed between the shaft ends of the first connecting shaft 6 and the second connecting shaft 11 and the first connecting part 2 and the second connecting part 3 to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

[0022] The working principle of the above embodiments is as follows: In use, by changing the connection method of the cross bearing to insert the ball head 13 into the rotating shaft groove 8 opened inside the needle roller bearing part 7 to form point contact instead of traditional surface contact, this design significantly reduces rotational friction and reduces no-load torque. The first ball bearing 9 and the second ball bearing 10 are installed between the shaft ends of the first connecting shaft 6 and the second connecting shaft 11 and the first connecting part 2 and the second connecting part 3 to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant structure for a universal joint of a steering gear steering shaft, comprising a steering shaft (1), characterized in that: Both ends of the steering shaft (1) are provided with a first connecting part (2), and a second connecting part (3) is provided between the first connecting parts (2). A short shaft (4) is fixedly connected to one end of the second connecting part (3). A first connecting shaft (6) is connected through the left and right sides of the first connecting part (2). A needle roller bearing part (7) is provided between the two first connecting shafts (6). A rotating shaft groove (8) is opened inside the needle roller bearing part (7). A first bearing component is provided between the two first connecting shafts (6) and the first connecting part (2). A second connecting shaft (11) is connected through the left and right sides of the second connecting part (3). A ball head (13) is fixedly connected to one end of the two second connecting shafts (11). A second bearing component is provided between one end of the two second connecting shafts (11) and the second connecting part (3).

2. The anti-wear structure for the universal joint of a steering gear shaft according to claim 1, characterized in that: Both the first connecting part (2) and the second connecting part (3) have round holes on their left and right sides. The inner wall of the round holes has an oil drain groove. The first connecting shaft (6) and the second connecting shaft (11) are respectively connected to the first connecting part (2) and the second connecting part (3) through the round holes.

3. The anti-wear structure for the universal joint of a steering gear shaft according to claim 2, characterized in that: The first connecting part (2) has first oil inlet holes (5) on both the left and right sides of its surface. There are four first oil inlet holes (5) arranged in a vertical array.

4. The anti-wear structure for the universal joint of a steering gear shaft according to claim 3, characterized in that: The second connecting part (3) has two second oil inlet holes (12) on both the left and right sides of its surface. There are four second oil inlet holes (12) arranged in a vertical array.

5. The anti-wear structure for the universal joint of a steering gear shaft according to claim 1, characterized in that: Both spherical heads (13) are inserted into the shaft groove (8), and point contact is formed between the two spherical heads (13) and the plane of the needle roller bearing part (7) to reduce rotational friction.

6. The anti-wear structure for the universal joint of a steering gear shaft according to claim 1, characterized in that: The first bearing component includes a first ball bearing (9). The first ball bearing (9) is rotatably disposed between the two first connecting shafts (6) and the first connecting part (2) to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

7. The anti-wear structure for the universal joint of a steering gear shaft according to claim 1, characterized in that: The second bearing component includes a second ball bearing (10). The second ball bearing (10) is rotatably disposed between the two second connecting shafts (11) and the second connecting part (3) to eliminate axial movement clearance and avoid abnormal wear caused by axial displacement.

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