Oil pipe joint for automobile power-assisted steering system

Abstract

The utility model relates to the field of automobile accessories, in particular to an oil pipe joint for an automobile power-assisted steering system. The oil pipe joint used for the automobile power-assisted steering system comprises a conical joint, wherein the conical joint comprises a main body, a conical part and a limiting part; the conical part is provided with a thick end and a thin end which are opposite, and the thick end is connected with the limiting part; the inner diameter of the screwed joint is larger than the outer diameter of the thin end and smaller than the outer diameter of the thick end; the fastening nut comprises a fixing part and a connecting part; the threaded joint and the conical part form extrusion sealing; and the anti-loosening structure is arranged between the connecting part and the threaded joint and is configured to prevent the connecting part and the threaded joint from being separated. According to the oil pipe joint for the automobile power-assisted steering system, an existing plug-in type joint is changed into a metal sealing structure joint, a sealing ring is omitted, and the situation that a conical joint and a threaded joint are not connected in place, the sealing ring is scratched, and oil leakage of an oil pipe is caused can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of automobile accessories, in particular to an oil pipe joint used for an automobile power steering system. Background Art

[0002] The power steering system is a system that can assist the driver in adjusting the direction of the car. It can reduce the driver's steering force and improve driving comfort and safety. In addition, the power steering system can also play a certain role in the economy of the car. The existing power steering systems are mainly divided into three types: mechanical hydraulic power steering system, electronic hydraulic power steering system and electric power steering system. Among them, the mechanical hydraulic power steering system is usually composed of hydraulic pumps, oil pipes, pressure flow control valve bodies, V-type transmission belts, oil tanks and other components. However, when the car is often driven in harsh environments, such as hot, humid or dusty areas, the oil pipe may age prematurely, causing oil leakage. When the oil pipe leaks, it needs to be replaced.

[0003] Existing oil pipes are generally installed using plug-in connectors. For example, the Chinese utility model patent with the announcement number CN22041656U discloses a high-pressure oil pipe quick-connect connector with a dustproof ring. The quick-connect connector includes a quick-connect female connector and a quick-connect male connector for the high-pressure oil pipe. The quick-connect female connector and the quick-connect male connector are movably connected. A dustproof ring groove is provided on the inner wall of one end of the quick-connect female connector. A dustproof ring is embedded in the dustproof ring groove. Sealing ring grooves are provided on the outer walls of both ends of the quick-connect male connector. A rolling assembly is provided on the side of one end of the quick-connect male connector near the quick-connect female connector. However, when this plug-in connector is used to connect two oil pipes, there is a risk of improper connection or scratching the sealing ring, resulting in leakage of the steering oil of the vehicle.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to improve or solve the technical problem that the plug-in joint in the prior art is not properly connected or the sealing ring is scratched, resulting in leakage of automobile steering oil, the utility model provides an oil pipe joint for an automobile steering power system. The oil pipe joint for the automobile steering power system includes: a conical joint, including a main body, a conical part arranged at one end of the main body, and a limiting part arranged between the main body and the conical part; the conical part has a relatively thick end and a thin end, and the thick end is connected to the limiting part; a threaded joint, a thread is provided on the outer peripheral wall of one end of the threaded joint; the inner diameter of the threaded joint is larger than the outer diameter of the thin end and smaller than the outer diameter of the thick end; a fastening nut, including a fixing part sleeved on the circumferential outer side of the main body, and a connecting part matched with the thread; the threaded joint is arranged between the conical part and the connecting part, and the threaded joint and the conical part form an extrusion seal; an anti-loosening structure is arranged between the connecting part and the threaded joint, and is configured to prevent the two from being separated.

[0006] In the oil pipe joint for the automobile power steering system of the utility model, a conical joint, a threaded joint and a fastening nut are included. Among them, the conical joint and the threaded joint are connected to the oil pipe respectively, and the fastening nut connects the conical joint and the threaded joint. The conical joint includes a main body, a conical portion and a limiting portion. The main body is used to connect the oil pipe, and the limiting portion is used to limit the fastening nut on the main body; the conical portion is used to connect with the threaded joint, and a metal extrusion seal is formed during the connection with the threaded joint. The threaded joint is provided with a thread, and the inner diameter of the threaded joint is larger than the outer diameter of the thin end and smaller than the inner diameter of the thick end, so that the threaded joint can be sleeved on the outer side of the thin end and form a metal extrusion seal with the threaded joint during the movement to the thick end. The fastening nut includes a fixing portion and a connecting portion, and the fastening nut drives the threaded joint to move from the thin end to the thick end through the threaded structure, and prevents the threaded joint from being separated from the conical portion. The anti-loosening structure is arranged between the connecting portion and the threaded joint, and is used to enhance the connection stability of the fastening nut and the threaded joint. Through the above-mentioned arrangement, the oil pipe joint of the utility model for the automobile power steering system modifies the existing plug-in joint into a metal extrusion sealing structure joint. The conical part can form a seal by extrusion deformation, eliminating the sealing ring, and can effectively avoid the situation where the conical joint and the threaded joint are not properly connected and the sealing ring is scratched, resulting in oil leakage in the oil pipe.

[0007] In the preferred technical solution of the oil pipe joint for the automobile power steering system, the anti-loosening structure includes a limit ring formed on the threaded joint, and a limit claw formed in a hinged matching connection with the connecting portion; the limit claw abuts against a side of the limit ring away from the connecting portion. Through the above arrangement, the arrangement of the limit ring is convenient to match the limit claw, thereby locking the clamping nut.

[0008] In the preferred technical solution of the oil pipe joint for the automobile power steering system, a floating ring is arranged between the limiting ring and the limiting claw, and a compression spring is arranged between the floating ring and the limiting ring, one end of the compression spring is connected to the floating ring, and the other end is connected to the limiting ring. Through the above arrangement, the floating ring is arranged in a floating manner, which facilitates the limiting claw to abut against the limiting ring.

[0009] In the preferred technical solution of the oil pipe joint for the automobile power steering system, a plurality of the limit claws are evenly and spacedly arranged along the circumference of the fastening nut. Through the above arrangement, the plurality of limit claws are evenly arranged, which can enhance the connection stability between the fastening nut and the threaded joint.

[0010] In the preferred technical solution of the oil pipe joint for the automobile power steering system, a limiting protrusion is formed on the limiting claw; and a limiting groove matching the limiting protrusion is arranged on the floating ring. Through the above-mentioned arrangement, the arrangement of the limiting protrusion and the limiting groove can prevent the limiting claw from being separated from the floating ring.

[0011] In the preferred technical solution of the oil pipe joint for the automotive power steering system, a support portion for pre-supporting the threaded joint is also provided at the thin end, and the outer diameter of the support portion is smaller than the inner diameter of the threaded joint. Through the above arrangement, the arrangement of the support portion facilitates the arrangement of the threaded joint on the tapered joint, thereby facilitating the connection between the threaded joint and the fastening nut.

[0012] In the preferred technical solution of the oil pipe joint for the automobile power steering system, the thickness of the tapered portion is uniformly arranged. Through the above arrangement, the thickness of the tapered portion is uniformly arranged, which facilitates the deformation of the tapered portion and further facilitates the formation of metal extrusion seal between the tapered joint and the threaded joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0014] Figure 1 The utility model is a schematic diagram of an embodiment of an oil pipe joint used in a steering power system of an automobile.

[0015] List of reference numerals: 1. conical joint; 11. main body; 12. conical portion; 13. limiting portion; 14. supporting portion; 2. threaded joint; 3. fastening nut; 31. fixing portion; 32. connecting portion; 4. anti-loosening structure; 41. limiting ring; 42. limiting claw; 43. floating ring; 44. compression spring; 45. limiting protrusion; 46. limiting groove. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0017] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In order to improve or solve the technical problem that the plug-in joint in the prior art is not properly connected or the sealing ring is scratched, resulting in leakage of automobile steering oil, the utility model provides an oil pipe joint for an automobile steering power system. The oil pipe joint for the automobile steering power system comprises: a conical joint 1, comprising a main body 11, a conical portion 12 arranged at one end of the main body 11, and a limiting portion 13 arranged between the main body 11 and the conical portion 12; the conical portion 12 has a relatively thick end and a thin end, and the thick end is connected to the limiting portion 13; a threaded joint 2, a thread is provided on the outer peripheral wall of one end of the threaded joint 2; the inner diameter of the threaded joint 2 is larger than the outer diameter of the thin end and smaller than the outer diameter of the thick end; a fastening nut 3, comprising a fixing portion 31 sleeved on the circumferential outer side of the main body 11, and a connecting portion 32 matched with the thread; the threaded joint 2 is arranged between the conical portion 12 and the connecting portion 32, and the threaded joint 2 and the conical portion 12 form an extrusion seal; an anti-loosening structure 4 is arranged between the connecting portion 32 and the threaded joint 2, and is configured to prevent the two from being separated.

[0020] Figure 1 Schematic diagram of an embodiment of the utility model for an oil pipe joint of an automobile power steering system. Figure 1 As shown, the oil pipe joint used in the automobile power steering system of the utility model comprises a tapered joint 1, a threaded joint 2, a fastening nut 3 and an anti-loosening structure 4.

[0021] Continue to see Figure 1 In one or more embodiments, the conical joint 1 includes a main body 11, a conical portion 12 and a limiting portion 13. The main body 11 is roughly hollow cylindrical. The limiting portion 13 is arranged at one end of the main body 11, and the diameter of the limiting portion 13 is larger than the diameter of the main body 11. The conical portion 12 is arranged at one end of the limiting portion 13 away from the main body 11. Specifically, the conical portion 12 has a relatively thick end and a thin end, and the thick end is connected to the limiting portion 13. The diameter of the thick end is smaller than the diameter of the limiting portion 13 and larger than the diameter of the thin end. Further, a support portion 14 is also provided at the thin end, and the support portion 14 is used to pre-support the threaded joint 2. Specifically, the support portion 14 is roughly annular, and the outer diameter of the support portion 14 is smaller than the inner diameter of the threaded joint 2, so as to pre-support the threaded joint 2. Further, the thickness of the conical portion 12 is evenly arranged, so that the conical portion 12 can be more conveniently extruded and deformed.

[0022] Continue to see Figure 1 In one or more embodiments, the threaded joint 2 is substantially cylindrical. A thread is provided on the outer peripheral wall of one end of the threaded joint 2, and the thread matches the fastening nut 3, so that the threaded joint 2 is connected to the fastening nut 3. Specifically, the inner diameter of the threaded joint 2 is larger than the outer diameter of the thin end and smaller than the inner diameter of the thick end.

[0023] Continue to see Figure 1 In one or more embodiments, the fastening nut 3 includes a fixing portion 31 sleeved on the outer side of the main body 11 in the circumferential direction, and a connection matching the thread. Specifically, the inner diameter of the fixing portion 31 matches the inner diameter of the main body 11, and is smaller than the inner diameter of the limiting portion 13, so that the fastening nut 3 is difficult to be separated from the conical joint 1 from the conical portion 12. The connecting portion 32 is roughly cylindrical, and the diameter of the connecting portion 32 is larger than the diameter of the limiting portion 13, so that the connecting portion 32 can be connected to the threaded joint 2. When replacing the oil pipe, the fastening nut 3 is first sleeved on the conical joint 1, and then the threaded joint 2 is sleeved on the support portion 14, and the threaded joint 2 is arranged between the support portion 14 and the connecting portion 32; then the fastening nut 3 is rotated to drive the threaded joint 2 to move from the thin end to the thick end, the conical portion 12 is extruded and deformed, and an extrusion seal is formed between the threaded joint 2 and the conical portion 12.

[0024] Continue to see Figure 1, the anti-loosening structure 4 is arranged between the connecting portion 32 and the threaded joint 2. In one or more embodiments, the anti-loosening structure 4 includes a limiting ring 41 formed on the threaded joint 2, and a limiting claw 42 that is hingedly connected to the connecting portion 32. Specifically, a hinge seat is provided on the fastening nut 3, one end of the limiting claw 42 is installed on the hinge seat, and the other end is against the side of the limiting ring 41 away from the conical portion 12. Further, a plurality of limiting claws 42 are evenly and spacedly arranged along the circumference of the fastening nut 3. Specifically, four limiting claws 42 are provided. Further, a floating ring 43 is provided between the limiting ring 41 and the limiting claw 42, and a compression spring 44 is provided between the floating ring 43 and the limiting ring 41, one end of the compression spring 44 is connected to the floating ring 43, and the other end is connected to the limiting ring 41. Furthermore, a limiting protrusion 45 is formed on the limiting claw 42 , and a limiting groove 46 matching the limiting protrusion 45 is provided on the floating ring 43 , so that the limiting claw 42 is prevented from being separated from the floating ring 43 by the limiting protrusion 45 and the limiting groove 46 .

[0025] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An oil pipe joint for an automobile power steering system, characterized in that: include: A conical joint (1) comprises a main body (11), a conical portion (12) arranged at one end of the main body (11), and a limiting portion (13) arranged between the main body (11) and the conical portion (12); the conical portion (12) has a thick end and a thin end opposite to each other, and the thick end is connected to the limiting portion (13); A threaded joint (2), wherein a thread is provided on the outer peripheral wall of one end of the threaded joint (2); the inner diameter of the threaded joint (2) is larger than the outer diameter of the thin end and smaller than the outer diameter of the thick end; The fastening nut (3) comprises a fixing portion (31) sleeved on the outer side of the main body (11) in the circumferential direction, and a connecting portion (32) matching the thread; the threaded joint (2) is arranged between the tapered portion (12) and the connecting portion (32), and the threaded joint (2) and the tapered portion (12) form an extrusion seal; An anti-loosening structure (4) is arranged between the connecting portion (32) and the threaded joint (2) and is configured to prevent the two from being separated.

2. The oil pipe joint for the automotive power steering system according to claim 1, characterized in that: The anti-loosening structure (4) comprises a limiting ring (41) formed on the threaded joint (2), and a limiting claw (42) which is hingedly connected to the connecting portion (32); the limiting claw (42) abuts against a side of the limiting ring (41) away from the connecting portion (32).

3. The oil pipe joint for the automobile power steering system according to claim 2, characterized in that: A floating ring (43) is arranged between the limiting ring (41) and the limiting claw (42), and a compression spring (44) is arranged between the floating ring (43) and the limiting ring (41), one end of the compression spring (44) is connected to the floating ring (43), and the other end is connected to the limiting ring (41).

4. The oil pipe joint for the automobile power steering system according to claim 3, characterized in that: A plurality of the limiting claws (42) are evenly and spacedly arranged along the circumference of the fastening nut (3).

5. The oil pipe joint for the automobile power steering system according to claim 3, characterized in that: A limiting protrusion (45) is formed on the limiting claw (42); and a limiting groove (46) matching the limiting protrusion (45) is arranged on the floating ring (43).

6. The oil pipe joint for a vehicle power steering system according to claim 1, characterized in that: A supporting portion (14) for pre-supporting the threaded joint (2) is also provided at the thin end, and the outer diameter of the supporting portion (14) is smaller than the inner diameter of the threaded joint (2).

7. The oil pipe joint for a vehicle power steering system according to claim 1, characterized in that: The tapered portion (12) has a uniform thickness.

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