Output shaft structure of an automobile steering gear

Abstract

The utility model discloses an output shaft structure of automobile steering gear, including steering column cylinder, be equipped with first sliding slot on steering column cylinder, be equipped with first sliding rod in first sliding slot sliding, the lateral surface of steering column cylinder is equipped with oil inlet pipe, and the oil inlet pipe is equipped with first oil inlet channel, second oil inlet channel and third oil inlet channel along its axial direction in proper order in succession, the oil inlet port of first oil inlet channel is equipped with first sealing door, and the second oil inlet channel is equipped with support frame, and support frame is equipped with sealing washer in, and the one end of third oil inlet channel is equipped with second sealing door close to second oil inlet channel, the shell of steering column cylinder is equipped with oil groove and fourth oil inlet channel, and the oil groove is linked together with third oil inlet channel, and the inside wall of steering column cylinder is equipped with oil outlet hole, and oil outlet hole is linked together with oil groove through fourth oil inlet channel. The utility model discloses through the three -layer sealing of first sealing door, sealing washer and second sealing door, can avoid having the impurity to enter the oil inlet pipe, better guarantee the lubrication effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of steering gear output shaft, and in particular relates to an output shaft structure for an automobile steering gear. Background Technology

[0002] The output shaft of the steering gear appropriately transforms the steering torque and steering angle of the steering wheel and outputs them to the steering tie rod mechanism, thereby enabling the car to achieve the steering purpose. To meet the needs of different drivers and driving scenarios, the output shaft must not only stably transmit torque but also have the ability to freely extend and retract. The internal components of the output shaft will continuously extend and slide. To reduce wear, extend the service life of the output shaft, and ensure the efficient operation of the steering system, the output shaft needs to be lubricated regularly. Authorization notice number CN207374476U discloses a steering gear output shaft. This steering gear output shaft includes a body, with one end as the input end containing a connecting cavity, and the other end as the output end. A first gear is located on the outer wall of the output end, with a buffer groove in the middle. Along the direction from the input end to the output end, the body also includes a shoulder, a reinforcing part, a main body, and a second gear. The input end, output end, first gear, shoulder, reinforcing part, main body, and second gear are an integral structure. The outer diameter of the shoulder is smaller than that of the reinforcing part, and the outer diameter of the main body is smaller than that of the reinforcing part. An annular groove for a retaining ring is located between the main body and the reinforcing part, and a sealing ring groove is located between the main body and the second gear for a sealing ring. The outer diameter of the second gear is larger than that of the first gear. This steering gear output shaft has the advantage of high strength. However, the lubrication oil hole openings in this technical solution are numerous, requiring operators to inject lubricating oil one by one, which is cumbersome. Furthermore, when not in use, dust can easily enter the output shaft through the oil holes, affecting its service life. Utility Model Content

[0003] Based on the above background, the purpose of this utility model is to provide an output shaft structure for an automobile steering system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An output shaft structure for an automotive steering gear includes a steering column cylinder, on which a first groove is formed, and a first slide rod is slidably disposed within the first groove. The steering column cylinder is provided with an oil inlet pipe on its side. The oil inlet pipe is provided with a first oil inlet channel, a second oil inlet channel and a third oil inlet channel in sequence along its axial direction, and the first oil inlet channel, the second oil inlet channel and the third oil inlet channel are connected to each other. The first and third oil inlet channels are cylindrical, while the second oil inlet channel is conical. The first oil inlet channel has a first sealing door rotatably installed at the oil inlet port, and the second oil inlet channel has a support frame snapped in place, with a sealing gasket inside the support frame; The third oil inlet channel is rotatably equipped with a second sealing door at one end near the second oil inlet channel; The steering column housing has an oil groove and a fourth oil inlet channel, and the oil groove is connected to the third oil inlet channel. An oil outlet hole is provided on the inner wall of the steering column cylinder, and the oil outlet hole is connected to the oil sump through the fourth oil inlet channel.

[0005] Furthermore, one end of the first sealing door is connected to the inner wall of the first oil inlet channel via a torsion spring, and the first sealing door rotates to open towards the inside of the first oil inlet channel; One end of the second sealing door is connected to the inner wall of the third oil inlet channel via a torsion spring, and the second sealing door rotates to open towards the inside of the third oil inlet channel.

[0006] Furthermore, the support frame is conical and is located at one end of the second oil inlet channel near the third oil inlet channel, and the outer wall of the support frame is in contact with the inner wall of the second oil inlet channel.

[0007] Furthermore, the sealing gasket has a cross-shaped opening in the middle.

[0008] Furthermore, the support frame is provided with a connecting rod, one end of which extends to the oil inlet end of the first oil inlet channel; and the side of the connecting rod is in contact with the inner wall of the first oil inlet channel.

[0009] Furthermore, the first sealing door is provided with a slot, which is engaged with one end of the connecting rod.

[0010] Furthermore, the first slide groove is a spline groove, and the first slide rod is a spline shaft.

[0011] Furthermore, the cross-section of the oil tank is a square structure with a semi-circular bottom, and the top of the fourth oil inlet channel is located in the middle of the semi-circle of the oil tank.

[0012] Furthermore, the oil outlet is inclined, and the inclination direction is downward from the fourth oil inlet channel toward the axis of the steering column.

[0013] This utility model has the following beneficial effects: 1. The three-layer seal of the first sealing door, the sealing gasket, and the second sealing door can prevent impurities from entering the oil inlet pipe, thus better ensuring the lubrication effect.

[0014] 2. The lubricating oil enters the oil tank through the third oil inlet channel and fills the bottom of the oil tank. When the lubricating oil is injected into the middle of the semi-circle of the oil tank, it will enter the inner cavity of the steering column cylinder through the fourth oil inlet channel and the oil outlet hole for lubrication. This can lubricate the steering column cylinder and the first slide rod more evenly, thereby improving the service life of the output shaft. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 For the present utility model Figure 2 A magnified structural diagram at point A; Figure 4 This is a three-dimensional structural diagram of the support frame and the first sealing door of this utility model.

[0017] Among them: 1. Steering column cylinder; 11. First slide groove; 12. Oil groove; 13. Fourth oil inlet channel; 14. Oil outlet hole; 2. First sliding rod; 3. Oil inlet pipe; 31. First oil inlet channel; 32. Second oil inlet channel; 33. Third oil inlet channel; 34. First sealing door; 35. Second sealing door; 36. Slot; 4. Support frame; 41. Sealing gasket; 42. Connecting rod. Detailed Implementation

[0018] 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.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] like Figure 1-4As shown, an output shaft structure for an automotive steering gear includes a steering column cylinder 1 and a first slide rod 2. The steering column cylinder 1 has a first groove 11, within which the first slide rod 2 slides. The first groove 11 is a splined groove, and the first slide rod 2 is a splined shaft. The top of the first slide rod 2 is connected to the steering wheel via an external assembly. An oil inlet pipe 3 is provided on the side of the steering column cylinder 1, forming a Y-shape with the steering column cylinder 1. The oil inlet pipe 3 contains a first oil inlet channel 31, a second oil inlet channel 32, and a third oil inlet channel 32, arranged sequentially along its axial direction. There are three oil inlet channels 33, and the first oil inlet channel 31, the second oil inlet channel 32, and the third oil inlet channel 33 are interconnected. The first oil inlet channel 31 and the third oil inlet channel 33 are cylindrical, while the second oil inlet channel 32 is conical. The diameter of the end of the second oil inlet channel 32 closer to the first oil inlet channel 31 is larger than the diameter of the end farther from the first oil inlet channel 31. The oil inlet port of the first oil inlet channel 31 is rotatably equipped with a first sealing door 34, and one end of the first sealing door 34 is connected to the inner wall of the first oil inlet channel 31 through a torsion spring. The first sealing door 34 rotates and opens towards the interior of the first oil inlet channel 31. A support frame 4 is fitted inside the second oil inlet channel 32. The support frame 4 is conical and located at one end of the second oil inlet channel 32 near the third oil inlet channel 33. The outer wall of the support frame 4 is in contact with the inner wall of the second oil inlet channel 32. A sealing gasket 41 is provided inside the support frame 4. The sealing gasket 41 can be made of sponge, rubber, or silicone. A cross-shaped opening is provided in the center of the sealing gasket 41. A connecting rod 42 is provided on the support frame 4. One end of the connecting rod 42 extends to the oil inlet end of the first oil inlet channel 31; and the side of the connecting rod 42 fits against the inner wall of the first oil inlet channel 31. A slot 36 is provided on the first sealing door 34, and the slot 36 is correspondingly engaged with one end of the connecting rod 42. A second sealing door 35 is rotatably provided at one end of the third oil inlet channel 33 near the second oil inlet channel 32; one end of the second sealing door 35 is connected to the inner wall of the third oil inlet channel 33 through a torsion spring, and the second sealing door 35 rotates to open towards the inside of the third oil inlet channel 33.

[0022] When the output shaft needs lubrication, lubricating oil is injected through a syringe. The syringe outlet can be either elongated or conical. The end of the syringe pushes open the first sealing door 34, passes through the sealing gasket 41, and pushes open the second sealing door 35, injecting lubricating oil into the third oil inlet channel 33 of the oil inlet pipe 3. After injection, the syringe is pushed out, and the second sealing door 35 and the first sealing door 34 automatically close due to the torsion spring. The sealing gasket 41 closes due to its own material properties, thereby sealing the oil inlet pipe 3 and preventing impurities from entering the oil inlet pipe 3, thus better ensuring the lubrication effect.

[0023] The steering column cylinder 1 has an oil groove 12 and a fourth oil inlet channel 13 inside its housing. The oil groove 12 is annular and coaxial with the steering column cylinder 1. The fourth oil inlet channel 13 is arranged along the axial direction of the steering column cylinder 1, and there are multiple fourth oil inlet channels 13. The oil groove 12 is connected to the third oil inlet channel 33. The cross-section of the oil groove 12 is a square structure with a semi-circular bottom. The top of the fourth oil inlet channel 13 is located in the middle of the semi-circle of the oil groove 12. An oil outlet hole 14 is provided on the inner side wall of the steering column cylinder 1. The oil outlet hole 14 is connected to the oil groove 12 through the fourth oil inlet channel 13. Each fourth oil inlet channel 13 is connected to multiple oil outlet holes 14. The oil outlet hole 14 is inclined, and the inclination direction is downward from the fourth oil inlet channel 13 toward the axis of the steering column cylinder 1.

[0024] Lubricating oil enters the oil sump 12 through the third oil inlet channel 33 and fills the bottom of the oil sump 12. When the lubricating oil is injected into the middle of the semi-circle of the oil sump 12, it will enter the inner cavity of the steering column cylinder 1 through the fourth oil inlet channel 13 and the oil outlet hole 14 for lubrication. This can lubricate the steering column cylinder 1 and the first slide rod 2 more evenly, thereby improving the service life of the output shaft.

[0025] The working principle of this utility model is as follows: When the output shaft needs to be lubricated, lubricating oil is injected through a syringe. The end of the syringe pushes open the first sealing door 34, passes through the sealing gasket 41, and pushes open the second sealing door 35, injecting lubricating oil into the third oil inlet channel 33 of the oil inlet pipe 3. The lubricating oil enters the oil trough 12 from the third oil inlet channel 33 and fills the bottom of the oil trough 12. When the lubricating oil is injected to the middle position of the semi-circle of the oil trough 12, it will enter the inner cavity of the steering column cylinder 1 through the fourth oil inlet channel 13 and the oil outlet hole 14 for lubrication. After the injection is completed, the syringe is pushed out, and the second sealing door 35 and the first sealing door 34 automatically close due to the torsion spring. The sealing gasket 41 closes due to its own material properties, thereby sealing the oil inlet pipe 3.

[0026] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An output shaft structure for an automobile steering gear, comprising a steering column cylinder (1), characterized in that: The steering column (1) is provided with a first sliding groove (11), and a first sliding rod (2) is slidably provided in the first sliding groove (11). The steering column cylinder (1) is provided with an oil inlet pipe (3) on its side. The oil inlet pipe (3) is provided with a first oil inlet channel (31), a second oil inlet channel (32) and a third oil inlet channel (33) in sequence along its axial direction. The first oil inlet channel (31), the second oil inlet channel (32) and the third oil inlet channel (33) are connected to each other. The first oil inlet channel (31) and the third oil inlet channel (33) are cylindrical, and the second oil inlet channel (32) is conical; The first oil inlet channel (31) has a first sealing door (34) rotatably installed at the oil inlet port, and a support frame (4) is snapped into the second oil inlet channel (32), and a sealing gasket (41) is installed inside the support frame (4). The third oil inlet channel (33) is provided with a second sealing door (35) at one end near the second oil inlet channel (32); The steering column cylinder (1) has an oil groove (12) and a fourth oil inlet channel (13) inside its housing, and the oil groove (12) is connected to the third oil inlet channel (33); An oil outlet hole (14) is provided on the inner wall of the steering column cylinder (1), and the oil outlet hole (14) is connected to the oil trough (12) through the fourth oil inlet channel (13).

2. The output shaft structure of an automobile steering gear according to claim 1, characterized by: One end of the first sealing door (34) is connected to the inner wall of the first oil inlet channel (31) via a torsion spring, and the first sealing door (34) rotates to open towards the inside of the first oil inlet channel (31); One end of the second sealing door (35) is connected to the inner wall of the third oil inlet channel (33) via a torsion spring, and the second sealing door (35) rotates to open in the direction of the interior of the third oil inlet channel (33).

3. The output shaft structure of the automotive steering system according to claim 1, characterized in that: The support frame (4) is conical and is located at one end of the second oil inlet channel (32) near the third oil inlet channel (33), and the outer wall of the support frame (4) is in contact with the inner wall of the second oil inlet channel (32).

4. The output shaft structure of the automotive steering system according to claim 1, characterized in that: The sealing gasket (41) has a cross-shaped opening in the middle.

5. The output shaft structure of the automotive steering system according to claim 1, characterized in that: The support frame (4) is provided with a connecting rod (42), one end of which extends to the oil inlet end of the first oil inlet channel (31); and the side of the connecting rod (42) is in contact with the inner wall of the first oil inlet channel (31).

6. The output shaft structure of the automotive steering system according to claim 5, characterized in that: The first sealing door (34) has a slot (36) which is engaged with one end of the connecting rod (42).

7. The output shaft structure of the automotive steering system according to claim 1, characterized in that: The cross-section of the oil tank (12) is a square structure with a semi-circular bottom, and the top of the fourth oil inlet channel (13) is located in the middle of the semi-circle of the oil tank (12).

8. The output shaft structure of the automotive steering system according to claim 7, characterized in that: The oil outlet (14) is inclined, and the inclination direction is downward from the fourth oil inlet channel (13) toward the axis of the steering column (1).

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