Hydraulic power cylinder assembly, steering system and vehicle

Abstract

The invention relates to the technical field of hydraulic power, and provides a hydraulic power cylinder assembly, a steering system and a vehicle. The hydraulic power cylinder assembly comprises a hydraulic power supply mechanism and an external power output mechanism which are arranged in parallel; the hydraulic power supply mechanism comprises a movable first output shaft; the external output power mechanism comprises a movable second output shaft; the end part of the first output shaft is rigidly connected with the end part of the second output shaft; the hydraulic power supply mechanism further comprises a first lateral force impact-resistant shell. The external power output mechanism further comprises a second lateral force impact-resistant shell. Wherein the side wall of the first lateral force impact-resistant shell is connected with the side wall of the second lateral force impact-resistant shell. The technical problems of sealing failure, mechanical wear and the like of a hydraulic power cylinder assembly caused by poor lateral force resistance of an existing power cylinder are solved.

Description

Technical Field

[0001] The present application relates to the field of hydraulic power technology, and in particular to a hydraulic power cylinder assembly, a steering system and a vehicle. Background Art

[0002] At present, hydraulic power cylinders have been widely used in the field of vehicles. As the power source of many systems, they ensure the reliable operation of various systems. However, the power cylinders currently used, whether single-acting or double-acting, have an inherent defect, that is, weak resistance to lateral force. Especially in the application of large-load off-road vehicles, the force conditions of the power cylinders are complex, and it is more likely to produce large lateral impact forces, resulting in risks such as poor stiffness, seal failure, and mechanical wear. If the lateral resistance is increased or the transition transmission structure is increased according to traditional ideas, it will lead to the overall heavyness of the hydraulic cylinder, complex system structure, and difficult spatial layout. At present, there are some patent descriptions of power cylinder structures, but they are basically some technologies related to expanding functions and integrated structures, and there are no related patent descriptions for improving lateral resistance.

[0003] Patent document 1 (CN201420853362.0) discloses a new linear power steering gear of a power steering system, which has a hydraulic power cylinder and a rack and pinion steering gear. The rack and pinion steering gear is provided with a rotary valve assembly, which is connected to the power cylinder through an oil circuit, and the two ends of the steering gear and the power cylinder are rigidly connected together through a mechanical connecting arm. During operation, when the input shaft of the steering gear rotates, the rotary valve assembly causes the power cylinder to form corresponding hydraulic power through the pipeline, and the rack and pinion structure determines the displacement of the power cylinder. The power cylinder can provide hydraulic power for the external load according to the predetermined displacement movement, that is, to achieve steering assistance. This device avoids the defect that the rack and pinion steering gear cannot be used on large vehicles due to its fragile structure, but due to the structural limitations of the rack and pinion steering gear, the improvement of the lateral stiffness of the power cylinder is limited, and the problem of the device's weak ability to resist lateral forces still exists.

[0004] Patent document 2 (CN201621486599.5) discloses a combined hydraulic centering cylinder, which has a centering cylinder body, a piston rod, left and right floating pistons, a locking cylinder and other parts. When the device is working, the oil chambers on both sides of the centering cylinder body are filled with high-pressure oil to push the two floating pistons to move toward the middle, and the floating pistons are pressed against the piston rod to ensure that it returns to the middle position; then the locking cylinder is filled with high-pressure oil, and the locking piston inside it overcomes the spring tension and moves downward until the lower end of the locking piston is inserted into the annular wedge groove on the piston rod, and the piston rod is stuck by the locking piston and cannot move left and right. This device realizes the function of hydraulic centering mechanical locking, but it has no effect on improving the ability to resist lateral forces. Summary of the invention

[0005] The purpose of this application is to provide a hydraulic power cylinder assembly, a steering system and a vehicle, which solves the technical problem of poor lateral force resistance of the existing power cylinder. The specific solution is as follows:

[0006] A hydraulic power cylinder assembly comprises: a hydraulic power supply mechanism and an external output power mechanism arranged in parallel; the hydraulic power supply mechanism comprises a movable first output shaft; the external output power mechanism comprises a movable second output shaft;

[0007] The end of the first output shaft is rigidly connected to the end of the second output shaft; the hydraulic power supply mechanism also includes a first lateral force resistance housing;

[0008] The external output power mechanism further includes a second lateral force resisting housing;

[0009] Among them, the side wall of the first lateral force anti-resisting shell is connected to the side wall of the second lateral force anti-resisting shell; the hydraulic power supply mechanism drives the first output shaft located inside the first lateral force anti-resisting shell to move, and synchronously drives the second output shaft located inside the second lateral force anti-resisting shell to move in the same direction.

[0010] Optionally, the first lateral force resisting shell and the second lateral force resisting shell are arranged up and down as a lateral force resisting support shell of an integral structure; wherein the front cross-sectional shape of the lateral force resisting support shell is an 8-shape; a first channel for sliding of the first output shaft arranged inside the first lateral force resisting shell and a second channel for sliding of the second output shaft arranged inside the second lateral force resisting shell are arranged parallel to each other; wherein the first output shaft sliding inside the first channel is designed as a piston rod, and the second output shaft sliding inside the second channel is designed as a lateral force resisting shaft; wherein the internal chamber of the first channel is constituted as a hydraulic oil chamber for relative sliding of the piston rod.

[0011] Optionally, the end of the piston rod is connected to the corresponding end of the lateral force resisting shaft through a connecting arm; through the setting of the connecting arm, the piston rod synchronously drives the lateral force resisting shaft to reciprocate under the drive of the hydraulic power supply mechanism; the end of the piston rod extending out of the hydraulic oil chamber is fixedly connected to the lower part of the connecting arm; the upper part of the connecting arm is fixedly connected to the lateral force resisting shaft.

[0012] Optionally, the cross-sectional shape formed by the lateral force resistance support shell, the lateral force resistance shaft, the connecting arm and the piston rod is a rectangular shape.

[0013] Optionally, the lateral force resisting shaft is connected to a first ball head seat fixedly provided at the end of the connecting arm, and a second ball head seat is fixedly provided at the other end away from the connecting arm; a first ring sleeve is protruding from one side of the upper part of the connecting arm close to the lateral force resisting shaft and covering the outer peripheral part of the lateral force resisting shaft, and a second ring sleeve is provided on the corresponding side of the second lateral force resisting shell; a retractable first flexible protective cover is provided between the first ring sleeve and the second ring sleeve; wherein, the first flexible protective cover can wrap the left side part of the lateral force resisting shaft extending out of the second lateral force resisting shell; a third ring sleeve is protruding from the side of the second lateral force resisting shell away from the second ring sleeve, and accordingly, a fixed sleeve is provided at the end of the lateral force resisting shaft away from the connecting arm; wherein, a retractable second flexible protective cover is provided between the third ring sleeve and the fixed sleeve; the second flexible protective cover can wrap the right side part of the lateral force resisting shaft extending out of the third ring sleeve.

[0014] Optionally, a first protective bushing and a second protective bushing are respectively provided near the outlet at both ends of the second channel inside the second lateral force resisting shell; wherein the first protective bushing and the second protective bushing, together with the outer surface of the lateral force resisting shaft and the inner surface of the second channel, constitute a lubrication gap which can be filled with grease.

[0015] Optionally, the hydraulic power supply mechanism also includes: an end cover that closes the opening at the right end of the hydraulic oil chamber, a guide sleeve that closes the opening at the left end of the hydraulic oil chamber, and a piston that is slidably arranged inside the hydraulic oil chamber and connected to one end of the piston rod; wherein the piston rod is fixedly connected to the connecting arm through the guide sleeve; the piston divides the hydraulic oil chamber into left and right chambers; at least two sets of sealing rings are provided on the outer surface of the side wall of the piston; and hydraulic oil delivery ports are provided on the side walls of the left chamber and the right chamber.

[0016] Optionally, a guide bushing that cooperates with the sliding of the piston rod is arranged in the center hole of the guide sleeve; a first ring portion is protruding from the side opposite to the connecting arm of the guide sleeve, and correspondingly, a second ring portion is protruding from the surface of one side of the lower part of the connecting arm; wherein, the outer diameter of the first ring portion is greater than the outer diameter of the second ring portion; a third flexible protective cover that can wrap the part of the piston rod extending out of the hydraulic oil chamber is arranged between the first ring portion and the second ring portion; and both ends of the third flexible protective cover are respectively sleeved on the outer surfaces of the first ring portion and the second ring portion.

[0017] A steering system comprises the hydraulic power cylinder assembly.

[0018] A vehicle comprises the steering system.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a hydraulic power cylinder assembly, a steering system and a vehicle; the hydraulic power cylinder assembly includes: a hydraulic power supply mechanism and an external output power mechanism arranged in parallel; the hydraulic power supply mechanism includes a movable first output shaft; the external output power mechanism includes a movable second output shaft; the end of the first output shaft is rigidly connected to the end of the second output shaft; the hydraulic power supply mechanism also includes a first lateral force resistance shell; the external output power mechanism also includes a second lateral force resistance shell; wherein the side wall of the first lateral force resistance shell is connected to the side wall of the second lateral force resistance shell. This design can effectively solve the problem of weak lateral force of the existing power cylinder assembly, and the overall structure is relatively simple, the layout space occupied is limited, and the risks of poor rigidity, sealing failure and mechanical wear are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the side of the hydraulic power cylinder assembly;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the front side of the lateral force resistance support shell;

[0023] Figure 3 It is a schematic diagram of the connection between the hydraulic power cylinder assembly and the external actuator;

[0024] Figure 4 Schematic diagram of the structure of the connecting arm.

[0025] In the figure:

[0026] 1. Hydraulic power supply mechanism; 11. First lateral force resisting housing; 12. First channel; 13. Piston rod; 130. Positioning block; 131. Tightening bolt; 14. End cover; 15. Guide sleeve; 16. Piston; 17. Guide bushing; 18. First ring portion; 19. Second ring portion; 19A. Third flexible protective cover;

[0027] 2. External output power mechanism; 20. Second channel; 21. Second lateral force resisting housing; 22. Lateral force resisting shaft; 23. Second flexible protective cover; 24. First ball head seat; 25. Second ball head seat; 26. First ring sleeve; 27. Second ring sleeve; 28. First flexible protective cover; 29. ​​Third ring sleeve; 200. Fixed sleeve;

[0028] 100. Lateral force resistance support shell;

[0029] 3. Connecting arm;

[0030] 4. The first protective bushing;

[0031] 5. Second protective bushing;

[0032] 6. Lubrication gap;

[0033] 7. Structural stable cavity;

[0034] 8. First pull rod;

[0035] 9. Second pull rod;

[0036] 10. Adjust the nut. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application clearer, the following will be combined with the attached Figure 1-4 The present application is further described in detail. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0039] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0041] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0042] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0043] Combine the following Figure 1 Embodiment 1 of the present application is described in detail.

[0044] Example 1

[0045] A hydraulic power cylinder assembly comprises: a hydraulic power supply mechanism 1 and an external output power mechanism 2 arranged in parallel; the hydraulic power supply mechanism 1 comprises a movable first output shaft; the external output power mechanism 2 comprises a movable second output shaft;

[0046] The end of the first output shaft is rigidly connected to the end of the second output shaft; the side wall of the first lateral force anti-resistance shell 11 composed of a non-retractable part included in the hydraulic power supply mechanism 1 is connected to the side wall of the second lateral force anti-resistance shell 21 composed of a non-retractable part included in the external output power mechanism 2; wherein, the hydraulic power supply mechanism 1 drives the first output shaft located inside the first lateral force anti-resistance shell 11 to move back and forth in a straight line, and synchronously drives the second output shaft located inside the second lateral force anti-resistance shell 21 to move in the same direction.

[0047] Specifically, the first output shaft included in the hydraulic power supply mechanism 1 and the second output shaft included in the external output power mechanism 2 are rigidly connected to each other up and down on the same side end; wherein, a structurally stable cavity 7 is formed between the portion where the first output shaft extends out of the first lateral force resistance housing 11 and the portion where the second output shaft extends out of the second lateral force resistance housing 21. The structurally stable cavity 7 is configured to cooperate with the first lateral force resistance housing 11 and the second lateral force resistance housing 21 so that the piston rod in the hydraulic power cylinder assembly can resist the impact of the lateral impact force when subjected to a large lateral impact force, and the piston rod will not be bent and deformed due to the force, resulting in failure of the device. The hydraulic power cylinder assembly of the present application has significantly improved stability in resisting lateral impact forces, ensuring that the friction cooperation between its internal components will not be abnormal.

[0048] Specifically, the external output power mechanism 2 is used as a power output mechanism to drive the external actuator to work; the hydraulic power supply mechanism 1 is used to provide driving force to the external output power mechanism 2 to drive the external output power mechanism 2 to operate.

[0049] Furthermore, when the input ends on both sides of the external output power mechanism 2 are impacted by a large lateral impact force, under the limiting protection of the first lateral force anti-resisting shell 11 and the second lateral force anti-resisting shell 21, the external force is transmitted to the first output shaft inside the first lateral force anti-resisting shell 11 through the second output shaft inside the second lateral force anti-resisting shell 21.

[0050] Compared with traditional power cylinder assemblies, when subjected to large lateral impact forces, there is often a lack of corresponding countermeasures; since the power cylinder assembly is a very precise manufacturing component, the dimensional accuracy directly affects the performance, efficiency and life of the engine. Among them, the outer diameter of the piston rod of the traditional power cylinder assembly is also a dimension output through precise calculation. Therefore, it is impossible to increase the outer diameter of the piston rod in order to improve the lateral force resistance of the piston rod. Once the outer diameter of the piston is unreasonably increased, it may cause the system to respond slowly, affecting the operating accuracy and sensitivity, and the friction resistance will also increase, thereby reducing the system efficiency.

[0051] In contrast, the present application provides a specially designed hydraulic power cylinder assembly, which can drive the external actuator to operate, such as steering operation, when the cylinder body is subjected to a large lateral impact force under complex working conditions; when suddenly subjected to a large external lateral impact force, the second output shaft inside the second lateral force resistance housing 21 is used to resist the first wave of lateral impact force, and then the overall structure of the hydraulic power supply mechanism 1 and the external output power mechanism 2 is used as a support backing to block the second wave of lateral impact force; finally, when the lateral impact force weakened by two waves is transmitted to the first output shaft (i.e., piston rod) inside the first lateral force resistance housing 11, the impact amplitude of the lateral impact force has been weakened to more than 90%. This avoids the risks of seal failure and mechanical wear of the hydraulic power cylinder assembly.

[0052] A further optimized design scheme is as follows: the first lateral force resisting shell 11 and the second lateral force resisting shell 21 are arranged together up and down to form a lateral force resisting support shell 100 with an integrated structure; wherein the front cross-sectional shape of the lateral force resisting support shell 100 is an 8-shape; a first channel 12 for sliding of the first output shaft arranged inside the first lateral force resisting shell 11 and a second channel 2 for sliding of the output shaft arranged inside the second lateral force resisting shell 21 are arranged parallel to each other; wherein the first output shaft sliding inside the first channel 12 is designed as a piston rod 13, and the second output shaft sliding inside the second channel 2 is designed as a lateral force resisting shaft 22; wherein the internal chamber of the first channel 12 is constituted as a hydraulic oil chamber for relative sliding of the piston rod 13.

[0053] Specifically, in order to improve the overall resistance strength of the hydraulic power cylinder assembly and to reduce the space occupancy, the first lateral force resistance shell 11 and the second lateral force resistance shell 21 involved in the present application are arranged up and down as an integrated structure of the lateral force resistance support shell 100; wherein, the front cross-sectional shape of the lateral force resistance support shell 100 is an 8-shape, and the structure of the lateral force resistance support shell 100 is designed to be narrow at the top and wide at the bottom, that is, the outer diameter and the inner diameter of the hole of the first lateral force resistance shell 11 are correspondingly larger than the outer diameter and the inner diameter of the hole of the second lateral force resistance shell 21. The layout advantage of this design is that, through the shape design of the lateral force resistance support shell 100, when subjected to a large external lateral impact force, the lateral impact force can be evenly dispersed to various parts of the lateral force resistance support shell 100, thereby avoiding stress concentration at a certain point or on a certain side, thereby improving the ability to resist lateral force while reducing the risk of local deformation and damage; secondly, the 8-shaped structural design of the lateral force resistance support shell 100 has high stability and high integration, reduces the space occupancy rate, and also facilitates the installation, arrangement and connection of various components (such as the lateral force resistance shaft 22, piston rod, etc.).

[0054] Furthermore, the end of the piston rod 13 is connected to the corresponding end of the lateral force resisting shaft 22 through the connecting arm 3; through the setting of the connecting arm 3, the piston rod 13 synchronously drives the lateral force resisting shaft 22 to reciprocate under the drive of the hydraulic power supply mechanism 1; the end of the piston rod 13 extending out of the hydraulic oil chamber is fixedly connected or fixedly sleeved with the lower part of the connecting arm 3; the upper part of the connecting arm 3 is fixedly connected or fixedly sleeved with the lateral force resisting shaft 22.

[0055] See also Figure 1 As shown, the lateral force resistance support housing 100, the lateral force resistance shaft 22, the connecting arm 3 and the piston rod 13 form a lateral cross-sectional shape that is rectangular.

[0056] Among them, when the input end of the external output power mechanism 2 is subjected to a large lateral impact force, the second output shaft inside the second lateral force resisting shell 21 is configured to be connected to the piston rod 13 located inside the first lateral force resisting shell 11 included in the hydraulic power supply mechanism 1 through the connecting arm 3, so that the lateral force resistance support shell 100 constitutes an impedance to the lateral force.

[0057] Specifically, the piston rod 13 and the lateral force resistance shaft 22 are arranged in parallel, and the ends on the same side of the two are connected by the connecting arm 3, so as to realize the synchronous movement of the piston rod 13 and the lateral force resistance shaft 22. Among them, when the piston rod 13 and the lateral force resistance shaft 22 are synchronously extended outward, the part where the piston rod 13 extends out of the first lateral force resistance housing 11, the part where the lateral force resistance shaft 22 extends out of the second lateral force resistance housing 21, and the left part of the lateral force resistance support housing 100 form a non-enclosed structural stable cavity 7, so as to ensure the stability of the operation of the piston rod 13 and the lateral force resistance shaft 22.

[0058] At the same time, according to the overall structural layout of the present application, the overall lateral cross-sectional view of the lateral force resistance support housing 100, the lateral force resistance shaft 22, the connecting arm 3 and the piston rod 13 is a rectangular structure, see Figure 1 Compared with the traditional piston rod 13, the overall rigidity of the assembly is greatly improved, and the overall resistance of the hydraulic power cylinder assembly is improved.

[0059] It should be further explained that, with respect to the diameter of the piston rod 13 of the hydraulic power cylinder assembly used in the prior art, the outer diameter of the piston rod 13 used in the present application is at least shortened by half under the same conditions (e.g., an external load of 2 tons). At the same time, the deformation of the piston rod 13 of the present application is increased by nearly 80%. For example, compared with the existing hydraulic power cylinder assembly, when subjected to a large lateral force, the radial elastic offset of the piston rod is reduced from the original 0.2 mm to 0.05 mm, and the deviation is reduced by 75%.

[0060] Furthermore, the lateral force resistance shaft 22 is connected to the end of the connecting arm 3 and is fixedly provided with a first ball head seat 24, and the other end away from the connecting arm 3 is fixedly provided with a second ball head seat 25; the connecting arm 3 is provided with a first ring sleeve 26 protruding from one side of the lateral force resistance shaft 22 and covering the outer peripheral part of the lateral force resistance shaft 22, and the corresponding side of the second lateral force resistance shell 21 is provided with a second ring sleeve 27; a retractable first flexible protective cover 28 is elastically connected between the first ring sleeve 26 and the second ring sleeve 27; wherein the first flexible protective cover 28 can be The left side portion of the lateral force resisting shaft 22 extending out of the second lateral force resisting shell 21 is sealed and wrapped; a third ring sleeve 29 is protrudingly provided on the side of the second lateral force resisting shell 21 away from the second ring sleeve 27, and correspondingly, a fixing sleeve 200 is provided on the end of the lateral force resisting shaft 22 away from the connecting arm 3; wherein a retractable second flexible protective cover 23 is elastically connected between the third ring sleeve 29 and the fixing sleeve 200; the second flexible protective cover 23 can wrap the right side portion of the lateral force resisting shaft 22 extending out of the third ring sleeve 29.

[0061] Furthermore, the overall structure of the connecting arm 3 is an 8-shaped structure; wherein, at least two reinforcing ribs are provided in the middle recessed areas on both sides of the connecting arm 3; and the overall connection strength of the connecting arm 3 is increased by the design of the reinforcing ribs.

[0062] During installation, the connecting arm 3 is integrally sleeved on the end of the lateral force resisting shaft 22 and the piston rod 13; wherein, the end of the lateral force resisting shaft 22 is threadedly connected to the first ball head seat 24 to press and fix the upper part of the connecting arm 3; the end of the piston rod 13 is threadedly connected to the external fixing bolt to press and fix the lower part of the connecting arm 3.

[0063] Specifically, the outer diameter of the first ring sleeve 26 is smaller than the outer diameter of the second ring sleeve 27; the outer diameter of the third ring sleeve 29 is larger than the outer diameter of the fixed sleeve 200; the advantage of this design is that when the lateral force resistance shaft 22 moves back and forth, sufficient gap can be left between the first flexible protective cover 28 and the second flexible protective cover 23 and the lateral force resistance shaft 22 to avoid frictional contact between the first flexible protective cover 28 and the second flexible protective cover 23 and the lateral force resistance shaft 22.

[0064] Specifically, the first ball head seat 24 and the second ball head seat 25 are used to connect external actuators; wherein the external actuators are inclined to the axis of the lateral force resistance shaft 22 in the direction of the lateral impact force of the actual vehicle; for example, the external actuator (such as a pull rod) is connected to the first ball head seat 24 or the second ball head seat 25 at a 35-degree direction.

[0065] In this embodiment, a detailed description is given by taking the external actuator as a tie rod as an example. The first ball head seat 24 is hinged to the ball head end of the first tie rod 8; the second ball head seat 25 is hinged to the ball head end of the second tie rod 9; and the other ends of the first tie rod 8 and the second tie rod 9 are both provided with ball head components. The ball head component includes a ball head seat connected to one end of the first tie rod 8 or the second tie rod 9, a ball head end hinged to the ball head seat, a ball head pin integrally connected to the ball head end, a connecting nut threadedly connected to the ball head pin, and a stop pin passing through the rod of the ball head pin to prevent the connecting nut from falling off.

[0066] The first pull rod 8 and the second pull rod 9 have the same structure; the bodies of the first pull rod 8 and the second pull rod 9 are both provided with an adjusting nut 10 for adjusting the length of the pull rod.

[0067] It can be understood that the lateral force resisting shaft 22 provided in the present application slides in the second channel inside the second lateral force resisting housing 21 in a sliding friction manner, thereby avoiding the situation where the seal fails and causes leakage of hydraulic oil.

[0068] Furthermore, through the joint support and limiting action of the first ring sleeve 26, the second ring sleeve 27, the third ring sleeve 29, the connecting arm 3 and the lateral force resistance support shell 100, the movement process of the lateral force resistance shaft 22 is limited, and the radial offset of the lateral force resistance shaft 22 is reduced as much as possible; and based on this, by utilizing the first flexible protective cover 28 and the second flexible protective cover 23, the lateral force resistance shaft 22 extending out of the two sides of the second lateral force resistance shell 21 is wrapped, thereby preventing external dust or particles from entering the second channel 20 inside the second lateral force resistance shell 21 and causing friction loss.

[0069] Furthermore, the first protective bushing 4 and the second protective bushing 5 are respectively provided at both ends of the second channel 20 inside the second lateral force resisting housing 21 near the outlet; wherein, the left side wall of the first protective bushing 4 and the right side wall of the second protective bushing 5 together with the outer side surface of the lateral force resisting shaft 22 and the inner surface of the second channel 20 constitute a lubricating gap 6 which can be filled with grease. It can be understood that the present application constructs a lubricating gap 6 which can be filled with grease and has an annular structure by using the first protective bushing 4 and the second protective bushing 5 and the inner space of the second channel 20. At the same time, the first protective bushing 4 and the second protective bushing 5 of the present application are non-embeddedly installed in the second channel 20. The advantage of this design is that, on the basis of achieving the movement limit of the lateral force resisting shaft 22, it not only reduces the sliding friction contact area between the lateral force resisting shaft 22 and the second lateral force resisting shell 21, but also provides lubrication effect to the outer surface of the lateral force resisting shaft 22 located inside the second channel 20 through the grease filled in the lubrication gap 6, thereby achieving the expected effect of reducing friction and increasing slip (i.e. reducing friction and increasing smoothness).

[0070] Furthermore, the hydraulic power supply mechanism 1 also includes: an end cover 14 that closes the opening at the right end of the hydraulic oil chamber, a guide sleeve 15 that closes the opening at the left end of the hydraulic oil chamber, and a piston 16 that is slidably arranged inside the hydraulic oil chamber and connected to the right end of the piston rod 13; wherein the left end of the piston rod 13 passes through the guide sleeve 15 and is fixedly sleeved with the connecting arm 3; the piston 16 divides the hydraulic oil chamber into left and right chambers; at least two groups of sealing rings (such as lip sealing rings) are provided on the outer surface of the side wall of the piston 16; and hydraulic oil delivery ports are provided on the lower side walls of the left chamber and the right chamber.

[0071] Specifically, the right end of the piston rod 13 extends into the interior of the piston and is fixed to the piston 16 by a tightening bolt 131; wherein, the right end face of the tightening bolt 131 is also provided with at least two pre-assembled threaded holes; and a positioning block 130 is provided around the outer surface of the right end of the piston rod 13 close to the left end face of the piston.

[0072] It can be understood that the hydraulic power supply mechanism 1 involved in the present application drives the lateral force resistance shaft 22 to move telescopically by pushing the piston 16; wherein, the power source of the hydraulic power supply mechanism 1 adopts a hydraulic drive mode; during use, the flow direction of the hydraulic oil is controlled by an external hydraulic oil pump, and the movement direction of the piston 16 inside the hydraulic oil chamber is controlled to achieve the reciprocating movement of the piston rod 13. The present application integrates the hydraulic power supply mechanism 1 and the external output power mechanism 2 to ensure the effectiveness of the product operation without occupying space as much as possible, and overcomes the design defects of the traditional complex structure. The service life of the product has been significantly improved.

[0073] Furthermore, a guide bushing 17 for slidingly cooperating with the piston rod 13 is arranged in the center hole of the guide sleeve 15; a first ring portion 18 is protrudingly provided on the side opposite to the connecting arm 3, and correspondingly, a second ring portion 19 is protrudingly provided on the surface of one side of the lower part of the connecting arm 3; wherein, the outer diameter of the first ring portion 18 is greater than the outer diameter of the second ring portion 19; a third flexible protective cover 19A is arranged between the first ring portion 18 and the second ring portion 19 and can wrap the portion of the piston rod 13 extending out of the hydraulic oil chamber; the two ends of the third flexible protective cover 19A are respectively sleeved on the outer surfaces of the first ring portion 18 and the second ring portion 19.

[0074] It can be understood that the inner surface of the center hole of the guide sleeve 15 of the present application is embedded with a guide bushing 17; wherein, the inner surface of the guide bushing 17 is flush with the inner surface of the remaining portion of the center hole of the guide sleeve 15; the advantage of this design is that by utilizing the inner surface of the guide bushing 17 to replace part of the inner surface of the center hole of the guide sleeve 15 to complete the sliding contact with the piston rod, thereby ensuring that the guide sleeve 15 completes the overall movement limit of the piston rod, achieving the technical effect of reducing the friction of the piston rod, and also ensuring the sealing effect inside the hydraulic oil chamber.

[0075] It should be further explained that, since the outer diameter of the first ring portion 18 is greater than the outer diameter of the second ring portion 19, when the third flexible protective cover 19A moves with the piston rod, there is sufficient gap between the third flexible protective cover 19A and the piston rod to avoid frictional contact.

[0076] Furthermore, a first O-ring is disposed on the inner surface of the center hole of the guide sleeve 15 near the left outlet; wherein a second O-ring is also disposed on the inner surface of the guide sleeve 15 in contact with the hydraulic oil chamber.

[0077] It can be understood that when the load direction of the external actuator is not coaxial with the lateral force resistance shaft 22, a lateral reaction force will inevitably be generated at the first ball head seat 24 and the second ball head seat 25. That is, the lateral reaction force at the second ball head seat 25 is directly borne by the lateral force resistance shaft 22, the lateral force resistance support housing 100 and the second protective bushing 5, and will not be transmitted to the piston rod 13; the lateral reaction force at the first ball head seat 24 is borne by the piston rod 13, the connecting arm 3, the lateral force resistance shaft 22, the lateral force resistance support housing 100 and the first protective bushing 4 together, and its overall rigidity is much greater than the rigidity of the piston rod 13 itself, which ultimately results in a small lateral reaction force transmitted to the piston rod 13, and most of the lateral reaction force is borne by the lateral force resistance shaft 22, but the sensitivity of the lateral force resistance shaft 22 to deformation and sealing is much lower than that of the piston rod 13, so it also indirectly greatly improves the ability of the hydraulic power cylinder assembly to resist lateral impact force.

[0078] It can be understood that compared with the prior art, the present application designs a special and highly integrated hydraulic power cylinder assembly, thereby improving the overall ability to resist lateral forces and avoiding the external effects of lateral impact forces on the piston rod during operation, which may cause the hydraulic seal failure inside the hydraulic oil chamber and the increased friction and wear during the movement of the piston rod, resulting in performance failure.

[0079] On the other hand, the present application provides a steering system including the hydraulic power cylinder assembly.

[0080] On the other hand, the present application provides a vehicle comprising the steering system.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic power cylinder assembly, characterized in that: include: A hydraulic power supply mechanism (1) and an external output power mechanism (2) arranged in parallel; The hydraulic power supply mechanism (1) comprises a movable first output shaft; the external output power mechanism (2) comprises a movable second output shaft; The end of the first output shaft is rigidly connected to the end of the second output shaft; The hydraulic power supply mechanism (1) further comprises a first lateral force resistance housing (11); the external output power mechanism (2) further comprises a second lateral force resistance housing (21); wherein the side wall of the first lateral force resisting shell (11) is connected to the side wall of the second lateral force resisting shell (21); When the input end of the external output power mechanism (2) is subjected to a lateral impact force, the hydraulic power supply mechanism (1) drives the first output shaft located inside the first lateral force resisting housing (11) to move, thereby synchronously driving the second output shaft located inside the second lateral force resisting housing (21) to move.

2. The hydraulic power cylinder assembly according to claim 1, characterized in that: The first lateral force resisting housing (11) and the second lateral force resisting housing (21) are arranged vertically to form a lateral force resisting support housing (100) of an integral structure; wherein the front cross-sectional shape of the lateral force resisting support housing (100) is an 8-shape; a first channel (12) for sliding of a first output shaft arranged inside the first lateral force resisting housing (11) and a second channel (2) for sliding of a second output shaft arranged inside the second lateral force resisting housing (21) are arranged parallel to each other; wherein the first output shaft sliding inside the first channel (12) is designed as a piston rod (13), and the second output shaft sliding inside the second channel (2) is designed as a lateral force resisting shaft (22); wherein the internal chamber of the first channel (12) constitutes a hydraulic oil chamber that can slide relative to the piston rod (13).

3. The hydraulic power cylinder assembly according to claim 2, characterized in that: The end of the piston rod (13) is connected to the corresponding end of the lateral force resistance shaft (22) through the connecting arm (3); the connecting arm (3) is arranged so that the piston rod (13) synchronously drives the lateral force resistance shaft (22) to reciprocate under the drive of the hydraulic power supply mechanism (1); the end of the piston rod (13) extending out of the hydraulic oil chamber is fixedly connected to the lower part of the connecting arm (3); the upper part of the connecting arm (3) is fixedly connected to the lateral force resistance shaft (22).

4. The hydraulic power cylinder assembly according to claim 3, characterized in that: The lateral cross-sectional shape formed by the lateral force resistance support housing (100), the lateral force resistance shaft (22), the connecting arm (3) and the piston rod (13) is a rectangular shape.

5. The hydraulic power cylinder assembly according to claim 4, characterized in that: The lateral force resisting shaft (22) is connected to the end of the connecting arm (3) and is fixedly provided with a first ball head seat (24), and the other end away from the connecting arm (3) is fixedly provided with a second ball head seat (25); the connecting arm (3) is provided with a first ring sleeve (26) protruding from one side of the upper part close to the lateral force resisting shaft (22) and covering the outer peripheral part of the lateral force resisting shaft (22), and the second ring sleeve (27) is provided on the corresponding side of the second lateral force resisting shell (21); a retractable first flexible protective cover (28) is provided between the first ring sleeve (26) and the second ring sleeve (27); wherein the first flexible protective cover (28) is provided with a first flexible protective cover (29); 8) The left side portion of the lateral force resisting shaft (22) extending out of the second lateral force resisting shell (21) can be wrapped; a third ring sleeve (29) is protrudingly provided on the side of the second lateral force resisting shell (21) away from the second ring sleeve (27), and correspondingly, a fixing sleeve (200) is provided on the end of the lateral force resisting shaft (22) away from the connecting arm (3); wherein a retractable second flexible protective cover (23) is provided between the third ring sleeve (29) and the fixing sleeve (200); the second flexible protective cover (23) can wrap the right side portion of the lateral force resisting shaft (22) extending out of the third ring sleeve (29).

6. The hydraulic power cylinder assembly according to claim 5, characterized in that: A first protective bushing (4) and a second protective bushing (5) are respectively arranged at both ends of the second channel (20) inside the second lateral force resisting shell (21) near the outlet; wherein the first protective bushing (4) and the second protective bushing (5) together with the outer surface of the lateral force resisting shaft (22) and the inner surface of the second channel (20) form a lubrication gap (6) which can be filled with grease.

7. The hydraulic power cylinder assembly according to claim 6, characterized in that: The hydraulic power supply mechanism (1) further comprises: an end cover (14) enclosing the right end opening of the hydraulic oil chamber, a guide sleeve (15) enclosing the left end opening of the hydraulic oil chamber, and a piston (16) slidably arranged inside the hydraulic oil chamber and connected to one end of the piston rod (13); wherein the piston rod (13) passes through the guide sleeve (15) and is fixedly connected to the connecting arm (3); the piston (16) divides the hydraulic oil chamber into left and right chambers; at least two sets of sealing rings are arranged on the outer surface of the side wall of the piston (16); and hydraulic oil delivery ports are arranged on the side walls of the left chamber and the right chamber.

8. The hydraulic power cylinder assembly according to claim 7, characterized in that: A guide bushing (17) is arranged in the center hole of the guide sleeve (15) and is slidably matched with the piston rod (13); a first ring portion (18) is convexly arranged on the side opposite to the connecting arm (3) of the guide sleeve (15), and correspondingly, a second ring portion (19) is convexly arranged on the surface of the lower side of the connecting arm (3); wherein the outer diameter of the first ring portion (18) is greater than the outer diameter of the second ring portion (19); a third flexible protective cover (19A) is arranged between the first ring portion (18) and the second ring portion (19) and is capable of wrapping around the portion of the piston rod (13) extending out of the hydraulic oil chamber; and the two ends of the third flexible protective cover (19A) are respectively sleeved on the outer surfaces of the first ring portion (18) and the second ring portion (19).

9. A steering system, characterized in that: The invention comprises a hydraulic power cylinder assembly as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: The invention comprises a steering system as claimed in claim 9.

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