Suspension oil cylinder and suspension system with same

Abstract

The utility model relates to the technical field of suspension, in particular to a suspension oil cylinder and a suspension system with the suspension oil cylinder, the suspension oil cylinder comprises a cylinder barrel, a piston rod, a piston and a damping adjusting assembly, the cylinder barrel comprises an outer cylinder body, a middle cylinder body and an inner cylinder body which are coaxially arranged, and medium outlets are formed in the middle cylinder body and the inner cylinder body. The outer cylinder body, the middle cylinder body and the inner cylinder body are communicated; the damping adjusting assembly comprises a throttling valve, the throttling valve is arranged on the outer cylinder body and communicates with a medium outlet of the middle cylinder, and the flow of a medium is controlled by controlling the opening degree of the throttling valve so as to adjust damping. The suspension oil cylinder is provided with a throttle valve, a damping fin, an energy accumulator and a supercharger structure, the rigidity and damping can be actively adjusted in combination with actual working conditions, and the driving comfort of a vehicle under different loads is further achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of suspension, in particular to a suspension oil cylinder and a suspension system having the same. Background Art

[0002] The oil-gas suspension is mainly composed of an oil-gas spring, which integrates elastic and damping elements. At the same time, the cylinder block has a certain guiding function, and the required vehicle body layout space is small. With its superior non-linear elastic characteristics and good shock absorption performance, it can meet the ride comfort requirements of engineering vehicles to the greatest extent. Due to the complex and diverse road conditions in mining areas, after the prototype vehicle is tuned, the suspension damping and suspension stiffness of the oil cylinder cannot be adjusted independently, which is called a passive suspension. Therefore, the comfort and operation stability of the mining truck driving under different road conditions cannot be changed. It can only be adjusted manually after parking, which is time-consuming and laborious and is not suitable for the complex and diverse mining area environment. At present, the commonly used independent oil-gas suspension cylinders for mining trucks on the market are all oil-gas integrated. The hydraulic oil and nitrogen are in the same chamber, and the damping holes are designed inside the oil cylinder. When leaving the factory, the size of the damping holes and the oil-gas ratio of the oil cylinder are fixed and cannot be adjusted independently later. Summary of the Invention

[0003] In view of at least one of the above technical problems, the utility model provides a suspension oil cylinder and a suspension system having the same, which can actively adjust the stiffness and damping according to the actual working conditions.

[0004] The utility model provides a suspension oil cylinder, which includes a cylinder barrel, a piston rod, a piston and a damping adjustment component. The cylinder barrel includes an outer cylinder body, an intermediate cylinder body and an inner cylinder body which are coaxially arranged. The intermediate cylinder body and the inner cylinder body are both provided with medium outlets to communicate the outer cylinder body, the intermediate cylinder body and the inner cylinder body. The damping adjustment component includes a throttle valve, and the throttle valve is arranged on the outer cylinder body and communicated with the medium outlet of the intermediate cylinder. The flow rate of the medium is controlled by controlling the opening degree of the throttle valve to adjust the damping.

[0005] Further, the damping adjustment component further includes a damping plate, the damping plate is provided with a plurality of axially penetrating perforations, and the damping plate is sleeved on the piston rod and can axially move relative to the piston rod.

[0006] Further, the piston is provided with a plurality of axially penetrating through holes, the piston rod has a boss, the piston is sleeved on the piston rod and there is a gap between the piston and the boss of the piston rod, and the damping plate is located in the gap and can axially move relative to the piston rod.

[0007] Further, the number of the through holes is greater than the number of the perforations, and some of the through holes correspond and coincide with the perforations.

[0008] Further, it further includes a stiffness adjustment component. The stiffness adjustment component includes an accumulator. An interface communicating with the medium outlet of the intermediate cylinder is provided on the outer cylinder body, and the accumulator is connected to the cylinder barrel through the interface.

[0009] Further, the stiffness adjustment component further includes a booster, and the booster is connected to the accumulator.

[0010] Further, it further includes a lock nut and a gasket. The piston is arranged on the piston rod and locked by the lock nut, and the gasket is arranged between the piston and the lock nut.

[0011] Further, it further includes a buffer column. The buffer column is arranged on the inner cylinder body, and an elastic member is sleeved between the buffer column and the cylinder barrel.

[0012] Further, it further includes a gland and an end cover. The gland and the end cover are arranged on one side of the cylinder barrel away from the piston.

[0013] The present utility model further provides a suspension system, including the above-mentioned suspension oil cylinder, and further including a controller. The controller is connected to the throttle valve to control the opening degree of the throttle valve.

[0014] The beneficial effects of the present utility model are as follows: The suspension oil cylinder is provided with a throttle valve, damping sheets, an accumulator and a booster structure, which can actively adjust the stiffness and damping according to the actual working conditions, and further realize the driving comfort of the vehicle under different loads. At the same time, the structure of the buffer column combined with the elastic member effectively avoids the direct hard impact between the piston rod and the cylinder barrel through secondary buffering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the suspension oil cylinder in the embodiment of the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the piston of the suspension oil cylinder in the embodiment of the present utility model;

[0018] Figure 3 It is a structural state diagram of the damping sheet of the suspension oil cylinder in the embodiment of the present utility model;

[0019] Figure 4This is a schematic structural diagram of the through hole of the piston in the embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of the perforation of the damping sheet in the embodiment of the present utility model.

[0021] Explanation of reference numerals:

[0022] 1. Outer cylinder body; 2. Intermediate cylinder body; 3. Inner cylinder body; 4. gland; 5. End cover; 6. Piston rod; 7. Piston; 8. Damping sheet; 9. Locking nut; 10. Gasket; 11. Buffer column; 12. Elastic member; 13. First interface; 14. Second interface; 15. Rod chamber; 16. Rodless chamber; 61. Boss; 71. Groove; 72. Through hole; 81. Perforation; 100. Suspension oil cylinder. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0025] In this article, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the sake of clear expression of the technical solution and convenient description, and therefore cannot be construed as a limitation to the present utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Refer to Figure 1, the present utility model provides a suspension oil cylinder 100, which includes a cylinder barrel, a piston rod 6, a piston 7, a damping adjustment component and a stiffness adjustment component. Among them, the cylinder barrel includes an outer cylinder body 1, an intermediate cylinder body 2 and an inner cylinder body 3 arranged coaxially. The intermediate cylinder body 2 and the inner cylinder body 3 are both provided with medium outlets to make the outer cylinder body 1, the intermediate cylinder body 2 and the inner cylinder body 3 communicate with each other.

[0028] The suspension oil cylinder 100 of the present utility model further includes a gland 4 and an end cover 5, and the gland 4 and the end cover 5 are arranged on the side of the cylinder barrel far from the piston 7. An inner oil cavity is formed between the inner cylinder body 3 and the end cover 5, an intermediate oil cavity is formed between the intermediate cylinder body 2 and the inner cylinder body 3, and an outer oil cavity is formed between the outer cylinder body 1, the intermediate cylinder body 2 and the end cover 5. The medium in the suspension oil cylinder 100 is in a state of oil-gas mixture. In a specific embodiment, the oil is hydraulic oil and the gas is nitrogen. Due to the non-miscible characteristics of hydraulic oil and nitrogen, the medium in the suspension oil cylinder 100 is in a stratified state. Refer to Figure 1 , when the suspension oil cylinder 100 is in a vertical state, the upper part of the outer oil cavity is filled with nitrogen, and the lower part of the outer oil cavity is filled with hydraulic oil.

[0029] Refer to Figures 1-3 , the damping adjustment component includes a throttle valve and a damping plate 8. Among them, the throttle valve (not shown in the figure) is arranged on the outer cylinder body 1 and communicates with the medium outlet of the intermediate cylinder. By controlling the opening degree of the throttle valve, the flow rate of the medium can be controlled to adjust the damping. More specifically, a first interface 13 is arranged on the outer cylinder body 1, and the first interface 13 is arranged at the lower part of the outer cylinder body 1. The throttle valve communicates with the outer oil cavity and the intermediate oil cavity through the first interface 13, so that the flow rate of the medium entering and leaving the outer oil cavity and the intermediate oil cavity can be changed, thereby controlling the damping force. In this embodiment, the throttle valve is an electromagnetic throttle valve.

[0030] Refer to Figure 1 、 Figure 3 and Figure 5 , the damping plate 8 is provided with a plurality of axially penetrating through holes 81, and the damping plate 8 is sleeved on the piston rod 6 and can axially move relative to the piston rod 6. In this embodiment, 4 through holes 81 are provided and are evenly distributed at intervals along the circumference of the damping plate 8. More specifically, the through holes 81 specifically include a first through hole a, a second through hole b, a third through hole c and a fourth through hole d.

[0031] Refer to Figure 1 、 Figure 2 and Figure 4, Correspondingly, a plurality of axially penetrating through holes 72 are formed in the piston 7. Among them, the number of the through holes 72 is greater than the number of the perforations 81, and some of the through holes 72 coincide with the perforations 81. In this embodiment, there are 8 through holes 72, which are evenly distributed at intervals in a ring shape along the piston 7. More specifically, the through holes 72 specifically include a first through hole A, a second through hole B, a third through hole C, a fourth through hole D, a fifth through hole E, a sixth through hole F, a seventh through hole G, and an eighth through hole H. During installation, the first perforation a, the second perforation b, the third perforation c, and the fourth perforation d on the damping sheet 8 correspond to the first through hole A, the second through hole B, the third through hole C, and the fourth through hole D on the piston 7, and the fifth through hole E, the sixth through hole F, the seventh through hole G, and the eighth through hole H on the piston 7 are blocked by the damping sheet 8.

[0032] Refer to Figure 1 The piston rod 6 has a boss, the piston 7 is sleeved on the piston rod 6 and there is a gap between the piston 7 and the boss of the piston rod 6, and the damping sheet 8 is located in the gap and can axially move relative to the piston rod 6. It should be noted that the axial direction refers to the length direction of the piston rod 6.

[0033] Refer to Figure 1 , The stiffness adjustment assembly includes an accumulator and a booster. An interface communicating with the medium outlet of the intermediate cylinder is provided on the outer cylinder body 1, and the accumulator is connected to the cylinder barrel through the interface. The booster is connected to the accumulator. Continue to refer to Figure 1 , A second interface 14 is provided on the outer cylinder body 1 for externally connecting an accumulator (not shown in the figure). More specifically, the second interface 14 is provided on the upper part of the outer cylinder body 1 so that the nitrogen gas filled in the upper part of the outer oil cavity can be connected to the accumulator through the second interface 14. Since the volume of the outer oil cavity is small and the buffer volume of the nitrogen gas is small and it is difficult to withstand a large impact, an accumulator is connected to increase the buffer volume and improve the buffer performance.

[0034] The accumulator is externally connected with a booster (not shown in the figure), and the pressure in the accumulator can be actively adjusted. Since the accumulator is communicated with the outer oil cavity, the booster can increase or decrease the nitrogen pressure in the outer oil cavity through the accumulator, so as to adjust the nitrogen pressure in the suspension cylinder 100 and realize the independent adjustment of the stiffness of the suspension cylinder 100.

[0035] Refer to Figure 1 , The suspension cylinder 100 of the present utility model further includes a locking nut 9 and a gasket 10. The piston 7 is arranged on the piston rod 6 and is locked by the locking nut 9, and the gasket 10 is arranged between the piston 7 and the locking nut 9. To prevent the piston 7 from detaching from the piston rod 6. The suspension cylinder 100 of the present utility model further includes a buffer column 11. The buffer column 11 is arranged on the inner cylinder body 3, and an elastic member 12 is sleeved between the buffer column 11 and the cylinder barrel. In a specific embodiment, the elastic member 12 is a disc spring.

[0036] The inner cavity body includes a rodless cavity 15 and a rod cavity 16. During the actual operation of the suspension oil cylinder 100, when the piston rod 6 is impacted and compressed, the hydraulic oil enters the rod cavity 16 from the rodless cavity 15 through the through holes 72 on the piston 7 and the perforations 81 on the damping plate 8. At this time, under the upward pressure of the hydraulic oil, the damping plate 8 is pushed open and moves upward along the piston rod 6, and the fifth through hole E, the sixth through hole F, the seventh through hole G, and the eighth through hole H on the piston 7 are no longer blocked by the damping plate 8. At this time, the hydraulic oil not only flows out from the first through hole A, the second through hole B, the third through hole C, and the fourth through hole D, but also enters the rod cavity from the fifth through hole E, the sixth through hole F, the seventh through hole G, and the eighth through hole H. Further, the hydraulic oil will enter the intermediate oil cavity from the rod cavity, and then enter the outer oil cavity through the throttle valve to compress the nitrogen in the outer oil cavity, realizing buffering. In a specific embodiment, a groove 71 is provided on the side of the piston 7 away from the locking nut 9, and some of the through holes 72 are arranged in the groove 71. When the hydraulic oil enters the rod cavity 16 from the rodless cavity 15, the setting of the groove 71 can increase the contact area between the hydraulic oil and the damping plate 8, making it easier for the damping plate 8 to be pushed open and move upward along the piston rod 6.

[0037] When the piston rod 6 is further compressed, the piston rod 6 will contact the buffer column 11. To avoid direct hard impact when the piston rod 6 contacts the buffer column 11, an elastic member 12 is sleeved between the buffer column 11 and the cylinder barrel. When the piston rod 6 contacts the buffer column 11 and continues to be compressed, the elastic member 12 is compressed to achieve further buffering and avoid direct impact with the cylinder barrel.

[0038] When the impact ends, under the action of the nitrogen pressure, the hydraulic oil enters the intermediate oil cavity from the outer oil cavity through the throttle valve, and then enters the rod cavity 16 of the inner oil cavity. At this time, due to the downward pressure of the hydraulic oil, the damping plate 8 is pressed on the piston 7, so the fifth through hole E, the sixth through hole F, the seventh through hole G, and the eighth through hole H on the piston 7 are blocked again, and the hydraulic oil can only enter the rodless cavity 15 from the first through hole A, the second through hole B, the third through hole C, and the fourth through hole D. At this time, the number of holes for the hydraulic oil is small and the damping force is large, realizing the shock absorption of the suspension oil cylinder 100.

[0039] The present invention also provides a suspension system, including the above-mentioned suspension oil cylinder 100 and a controller (not shown in the figure). The controller is electrically connected to the throttle valve to control the opening degree of the throttle valve to adjust the damping.

[0040] In a specific embodiment, when the vehicle equipped with the above suspension system is unloaded or semi-loaded, in order to improve the driving comfort of the vehicle, at this time, it is necessary to make the stiffness of the suspension cylinder 100 smaller. The pressure in the accumulator can be actively reduced, and at this time, the stiffness of the suspension cylinder 100 can be reduced. When the vehicle equipped with the above suspension system is fully loaded or overloaded, in order to improve the load-bearing capacity of the suspension cylinder 100, at this time, it is necessary to make the stiffness of the suspension cylinder larger, and the pressure in the accumulator can be actively increased. When the vehicle equipped with the above suspension system is driving on a bumpy road condition, by actively adjusting the opening degree of the throttle valve, the flow rate of the hydraulic oil in the outer oil chamber and the inner oil chamber is controlled, thereby adjusting the damping, improving the vibration of the vehicle, and enhancing the smoothness of vehicle driving. When the weather is hot in summer or the vehicle runs continuously, the internal temperature of the suspension cylinder 100 will rise. At this time, the nitrogen pressure in the suspension cylinder 100 will also increase with the increase of the temperature, and the large stiffness of the suspension cylinder 100 will increase, affecting the driving comfort. At this time, this phenomenon can be improved by adjusting the accumulator pressure.

[0041] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A suspension oil cylinder, characterized in that, It includes a cylinder barrel, a piston rod, a piston and a damping adjustment component. The cylinder barrel includes an outer cylinder body, an intermediate cylinder body and an inner cylinder body which are coaxially arranged. The intermediate cylinder body and the inner cylinder body are both provided with a medium outlet to communicate the outer cylinder body, the intermediate cylinder body and the inner cylinder body. The damping adjustment component includes a throttle valve which is arranged on the outer cylinder body and communicated with the medium outlet of the intermediate cylinder. The flow rate of the medium is controlled by controlling the opening degree of the throttle valve to adjust the damping.

2. The suspension oil cylinder according to claim 1, characterized in that, The damping adjustment component further includes a damping plate which is provided with a plurality of axially penetrating perforations, and the damping plate is sleeved on the piston rod and can axially move relative to the piston rod.

3. The suspension oil cylinder according to claim 2, wherein, The piston is provided with a plurality of axially penetrating through holes, the piston rod has a boss, the piston is sleeved on the piston rod and there is a gap between the piston and the boss of the piston rod, and the damping plate is located in the gap and can axially move relative to the piston rod.

4. The suspension oil cylinder according to claim 3, characterized in that, The number of the through holes is greater than the number of the perforations, and some of the through holes correspond and coincide with the perforations.

5. The suspension oil cylinder according to claim 1, wherein It further includes a stiffness adjustment component which includes an accumulator. An interface communicated with the medium outlet of the intermediate cylinder is arranged on the outer cylinder body, and the accumulator is connected to the cylinder barrel through the interface.

6. The suspension oil cylinder according to claim 5, wherein, The stiffness adjustment component further includes a supercharger which is connected to the accumulator.

7. The suspension oil cylinder according to claim 1, wherein It further includes a lock nut and a gasket. The piston is arranged on the piston rod and locked by the lock nut, and the gasket is arranged between the piston and the lock nut.

8. The suspension oil cylinder according to claim 1, characterized in that, It further includes a buffer column which is arranged on the inner cylinder body, and an elastic member is sleeved between the buffer column and the cylinder barrel.

9. The hanging oil cylinder according to claim 1, wherein It further includes a gland and an end cover which are arranged on one side of the cylinder barrel far from the piston.

10. A suspension system, characterized in that, It includes the suspension oil cylinder according to any one of claims 1 to 9, and further includes a controller which is connected to the throttle valve to control the opening degree of the throttle valve.

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