Gas-liquid variable force spring

Abstract

The utility model discloses a gas-liquid variable force spring which is characterized by comprising a cylindrical air cylinder, an air inlet channel is arranged at the top of the air cylinder, a cylindrical piston tube is connected below the air cylinder, a plurality of vertically-through plug channels are arranged on the piston tube, and the lower portions of the plug channels are sealed through valve plates of electromagnetic valves. The piston is arranged in an inner cavity of the air cylinder, the piston is composed of an upper plug plate and a lower plug column, the plug column is matched with the plug channel and extends into the plug channel, and a plug pad is arranged at the lower end of the plug column; a funnel-shaped oil cylinder is connected below the piston pipe, hydraulic oil is contained in the oil cylinder, and an oil plug is arranged in an oil pipe below the oil cylinder. A limiting protruding ring protruding inwards is arranged on the inner wall of the top end of the plug channel. The plug channel comprises a main plug channel arranged in the center of the piston pipe and adjusting channels distributed on the periphery of the main plug channel, and the lower ends of the adjusting channels are sealed through a valve plate of the electromagnetic valve. An adjusting plate is additionally arranged between the piston pipe and the oil cylinder, a valve hole matched with the plug channel is formed in the adjusting plate, and the electromagnetic valve is arranged at the position, close to the valve hole, of the adjusting plate.

Description

Technical Field

[0001] The utility model relates to the technical field of springs, in particular to a gas-liquid variable force spring. Background Art

[0002] As we all know, vehicle shock absorber springs are an important part of the automobile suspension system. Their main function is to reduce vibration and bumps during vehicle driving and improve ride comfort. Common vehicle shock absorber springs include metal coil springs, air springs, and leaf springs. Metal coil springs are relatively active and will cause excess rebound, so they are often used in conjunction with shock absorbers to increase suspension rigidity, thereby enhancing vehicle body stability. The disadvantage is that they still produce large vibrations and a lot of noise, and have poor controllability; leaf springs are too hard and lack comfort; and although existing air springs have a certain degree of controllability, the control method is to continuously inflate and deflate, the adjustment method is single, and the controllability is not high, which cannot truly bring stability and comfort to vehicle driving. Utility Model Content

[0003] The purpose of the utility model is to provide a gas-liquid variable force spring, which can quickly and accurately control the supporting force of the spring, so that the vehicle body is stable and the roll degree is low under special circumstances (such as the elk test), the suspension state is comfortable, and the spring does not harden, while taking into account the characteristics of controllability, stability and comfort. The specific scheme is as follows.

[0004] The gas-liquid variable force spring is characterized in that it includes a cylindrical cylinder with an air inlet passage on the top of the cylinder, a cylindrical piston tube connected to the bottom of the cylinder, a plurality of plug channels penetrating up and down are provided on the piston tube, and the bottom of the plug channel is closed by a valve plate of an electromagnetic valve; the piston is arranged in the inner cavity of the cylinder, the piston is composed of a plug plate on the top and a plurality of plug rods on the bottom, the plug rods extend into each plug channel respectively, and the plug pads at the lower ends of the plug rods cooperate with the plug channels; a funnel-shaped oil cylinder is connected to the bottom of the piston tube, the oil cylinder is filled with hydraulic oil, and an oil plug is provided in the oil pipe below the oil cylinder.

[0005] The inner wall of the top end of the plug channel is provided with a limiting convex ring protruding inwards.

[0006] The plug channel comprises a main plug channel arranged at the center of the piston tube and an adjusting channel (secondary plug channel) distributed around the main plug channel. The valve plate of the solenoid valve closes the lower end of the adjusting channel.

[0007] An adjusting plate is additionally arranged between the piston tube and the oil cylinder, a valve hole cooperating with the plug channel is arranged on the adjusting plate, and the electromagnetic valve is arranged near the valve hole of the adjusting plate.

[0008] The solenoid valve structure is that the valve stem penetrates into the valve hole from the outside of the regulating plate, a valve plate is provided on the inner end of the valve stem to seal the valve hole, the outer end of the valve stem is connected to the output end of the motor, and the motor controls the valve stem to rotate to open and close the valve hole.

[0009] The outer wall of the regulating plate is provided with fixing ears at intervals, and an annular plate is fixed through the fixing ears. Motors are fixed at intervals on the annular plate, and the output end of the motor is connected to the outer end of the valve stem.

[0010] The regulating plate, piston tube and oil cylinder are fixed together by fixing ears on the outer wall, or are integrally formed.

[0011] The oil plug comprises an oil plug column, an oil plug pad matching the inner diameter of the oil pipe is arranged on the top of the oil plug column, and a limiting convex ring protruding inwards is arranged on the inner wall of the bottom of the oil pipe.

[0012] The plug plate, plug pad, valve plate and outer edge are provided with sealing rings. The junction of the cylinder and the piston tube is provided with a sealing ring.

[0013] The working principle of this technical solution is as follows:

[0014] 1. Fix the device at a suitable position on the vehicle, and use a high-pressure air pipe to connect the air inlet of the cylinder with the high-pressure gas tank prepared on the vehicle. The high-pressure gas enters the inner cavity of the cylinder and reaches a relatively stable state with the hydraulic oil in the cylinder.

[0015] 2. When the vehicle is turning quickly, the oil plug is compressed inward due to the eccentricity, the hydraulic oil pushes the piston upward, and the piston compresses the air to form an air spring, reducing the instability of the vehicle.

[0016] Further explanation of the technical effect of this technical solution:

[0017] 1. This solution sets up multiple plug channels, including a main plug channel and multiple adjustment channels (secondary plug channels). The contact area between the hydraulic oil and the piston can be changed by opening or closing the solenoid valve, thereby adjusting the elastic force of the spring of this device. For example, when part of the plug channel is closed, the area of ​​the remaining piston (cylinder piston) is three times the area of ​​the oil plug (cylinder piston), and the stroke of the piston (cylinder piston) will be one-third of the stroke of the oil plug (cylinder piston); when the valve plate continues to be closed, the area of ​​the cylinder piston is twice the area of ​​the oil cylinder piston, and the stroke of the cylinder piston will be one-half of the stroke of the oil cylinder piston, and the elastic force of the device will "harden"; when all the valve plates are closed, only the main plug channel is left, and the cross-sectional area of ​​the main plug channel is equal to that of the oil pipe, the force of the cylinder piston will be completely transferred to the cylinder piston, and the stroke of the cylinder piston will be equal to the stroke of the cylinder piston. At this time, the elastic force of the device will reach the "hardest" and the supporting force will be the strongest, which is suitable for sharp turns (such as the car moose test); on the contrary, when all the valve plates are opened, the hydraulic oil is fully applied to the plug pads of each cylinder piston, the stroke of the cylinder piston will become shorter relative to the stroke of the oil cylinder piston, and the device will reach the "softest" and the supporting force will be the weakest. Therefore, it can be concluded that the area ratio of the air cylinder piston and the oil cylinder piston is inversely proportional to the stroke ratio of the air cylinder piston and the oil cylinder piston, and the area ratio of the air cylinder piston and the oil cylinder piston is also inversely proportional to the hardness (supporting force) of the device;

[0018] 2. This device changes the supporting force by opening and closing the solenoid valve. The response speed of the solenoid valve is about 10 milliseconds, which can provide sufficient supporting force to the vehicle suspension in time, so that the vehicle body is stable and will not tilt when making sharp turns, and the spring will not be too hard when the vehicle is suspended normally, taking into account comfort.

[0019] In summary, the gas-liquid variable force spring provided by the utility model takes into account both controllability and stability, enhances the off-road performance of the vehicle, and greatly improves the safety and comfort of heavy-duty vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the exploded structure of Example 2 of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of Example 2 of the utility model;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustment plate of Example 2 of the utility model;

[0025] Figure 6 It is a schematic diagram of different styles of structures of the adjustment plate of Example 2 of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the embodiment 2 of the utility model after the motor is installed Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the structure of the embodiment 2 of the utility model after the motor is installed Figure 2 .

[0028] Explanation of marks in the figure: 1 cylinder, 1-1 intake duct, 1-2 inner cavity, 2 piston (cylinder piston), 2-1 plug plate, 2-2 plug column, 2-3 plug gasket, 3 piston tube, 3-1 main plug channel, 3-2 adjusting channel (secondary plug channel), 4 adjusting plate, 4-1 valve hole, 4-2 solenoid valve, 4-2-1 valve plate, 4-2-2 valve stem, 4-2-3 connector, 5 oil cylinder, 5-1 oil pipe, 5-2 convex ring, 6 fixing ear, 7 oil plug (cylinder piston), 7-1 oil plug gasket, 7-2 oil plug column, 8 motor, 9 annular plate. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0030] Example 1, see attached Figure 1-2 , a gas-liquid variable force spring, characterized in that it includes a cylindrical cylinder 1, an air inlet 1-1 is opened on the top of the cylinder, a cylindrical piston tube 3 is connected to the bottom of the cylinder, a plurality of plug channels are provided on the piston tube which are connected up and down, and the bottom of the plug channel is closed by a valve plate 4-2-1 of an electromagnetic valve 4-2; a piston 2 is arranged in an inner cavity 1-2 of the cylinder, and the piston is composed of a plug plate 2-1 at the top and a plurality of plug rods 2-2 at the bottom, the plug rods extend into each plug channel respectively, and the plug pads 2-3 at the lower end of the plug rods cooperate with the plug channels; a funnel-shaped oil cylinder 5 is connected to the bottom of the piston tube, and hydraulic oil is filled in the oil cylinder, and an oil plug 7 is provided in the oil pipe 5-1 at the bottom of the oil cylinder.

[0031] The inner wall of the top end of the plug channel is provided with a limiting convex ring protruding inwards.

[0032] The plug channel includes a main plug channel 3-1 arranged at the center of the piston tube and a regulating channel 3-2 (secondary plug channel) distributed around the main plug channel. The valve plate of the solenoid valve closes the lower end of the regulating channel.

[0033] The solenoid valve structure is that the valve stem penetrates into the regulating channel from the outside of the piston tube, a valve plate is provided on the inner end of the valve stem to block the regulating channel, the outer end of the valve stem is connected to the output end of the motor, and the motor controls the valve stem to rotate to open and close the regulating channel.

[0034] The piston tube and the oil cylinder are integrally formed and are fixed to the cylinder via outer wall fixing ears.

[0035] The oil plug comprises an oil plug column 7-2, the top of which is provided with an oil plug pad 7-1 matching the inner diameter of the oil pipe, and the inner wall at the bottom of the oil pipe is provided with a convex ring 5-2 which protrudes inwards and plays a limiting role.

[0036] The plug plate, plug pad, valve plate and outer edge are provided with sealing rings. The junction of the cylinder and the piston tube is provided with a sealing ring.

[0037] In this embodiment, fixing ears 6 may be provided at intervals on the outer wall of the piston tube, and an annular plate 9 may be fixed through the fixing ears. A motor 8 may be fixed at intervals on the annular plate, and the output end of the motor is connected to the outer end of the valve stem.

[0038] In this embodiment, the piston tube and the oil cylinder are integrally formed, which has better strength and integrity.

[0039] It should be noted that when the oil plug column squeezes the piston to move the piston upward during the car moose test, the pressure in the high-pressure gas tank connected to the intake duct will increase. Usually, a pressure sensor will be installed in the high-pressure gas tank, and a displacement sensor will be installed on the oil plug column. When the pressure value in the tank exceeds the preset value of the pressure sensor and the displacement of the oil plug exceeds the preset displacement value, the motor will control the valve plate to close in advance to avoid the oil volume in the regulating channel reaching the maximum value and closing the piston to the top, thereby causing the spring to lose its elasticity. When the valve plate is closed in other cases (including the piston moving down to the lowest end), the regulating channel is in a vacuum state, and the vacuum itself is also a low air pressure. After testing, the force of the car body shaking is much greater than the pulling force on the piston in the vacuum state, which means that the vacuum state will hardly affect the normal travel of the spring.

[0040] Before the car starts, the normally open and normally closed valves are determined by the load of the car body. The normally closed valves will not open until the load changes. When making a sharp turn, the normally open valves may be closed briefly, and then open to return to their original state.

[0041] Example 2, see attached Figure 1-8 , a gas-liquid variable force spring, characterized in that it includes a cylindrical cylinder 1, an air inlet 1-1 is opened on the top of the cylinder, a cylindrical piston tube 3 is connected to the bottom of the cylinder, a plurality of plug channels are provided on the piston tube which pass through the top and bottom, and the bottom of the plug channel is closed by a valve plate of an electromagnetic valve; a piston 2 is arranged in an inner cavity 1-2 of the cylinder, the piston is composed of a plug plate 2-1 at the top and a plurality of plug rods 2-2 at the bottom, the plug rod cooperates with the plug channel and the plug rod extends into the plug channel, and a plug pad 2-3 is provided at the lower end of the plug rod; a funnel-shaped oil cylinder 5 is connected to the bottom of the piston tube, the oil cylinder is filled with hydraulic oil, and an oil plug 7 is provided in the oil pipe 5-1 at the bottom of the oil cylinder.

[0042] The inner wall of the top end of the plug channel is provided with a limiting convex ring protruding inwards.

[0043] The plug channel comprises a main plug channel arranged at the center of the piston tube and an adjusting channel (secondary plug channel) distributed around the main plug channel. The valve plate of the solenoid valve closes the lower end of the adjusting channel.

[0044] As attached Figure 6 As shown, this embodiment provides two main plug channel and regulating channel modes: Mode 1, the regulating channel area is equal to and smaller than the main plug channel; Mode 2, with the main plug channel as the rotation center, two groups of regulating channels are rotationally symmetrical, each group of regulating channels includes five regulating channels, and the area ratios with the main plug channel are 0.2, 0.4, 1, 2, and 4 respectively. In this way, closing different proportions of the cylinder passage can obtain different supporting forces to adapt to vehicle conditions and road conditions. It should be noted that it is better to switch the solenoid valve in a symmetrical pair at the same time, so that the cylinder piston is subjected to balanced force and has a longer service life.

[0045] An adjusting plate 4 is additionally provided between the piston tube and the oil cylinder, on which a valve hole 4-1 cooperating with the plug is provided, and a solenoid valve is arranged near the valve hole of the adjusting plate.

[0046] The solenoid valve structure is that the valve stem 4-2-2 penetrates into the valve hole from the outside of the adjusting plate, a valve plate is provided on the valve stem to seal the valve hole, the inner end of the valve stem is arranged on the inner wall of the adjusting channel so that the valve stem can withstand greater pressure, the outer end of the valve stem is connected to the output end of the motor, and the motor controls the rotation of the valve stem to realize the opening and closing of the valve hole.

[0047] The adjusting plate, the piston tube and the oil cylinder are fixed by the fixing ears on the outer wall. The piston tube and the cylinder are fixed by the fixing ears on the outer wall.

[0048] The oil plug comprises an oil plug column 7-2, the top of which is provided with an oil plug pad 7-1 matching the inner diameter of the oil pipe, and the inner wall at the bottom of the oil pipe is provided with a convex ring 5-2 which protrudes inwards and plays a limiting role.

[0049] The plug plate, plug pad, valve plate and outer edge are provided with sealing rings. The junction of the cylinder and the piston tube is provided with a sealing ring.

[0050] In this embodiment, fixing ears 6 may be provided at intervals on the outer wall of the adjustment plate, and an annular plate 9 may be fixed through the fixing ears. Motors 8 may be fixed at intervals on the annular plate, and the output end of the motor is connected to the outer end of the valve stem.

[0051] In this embodiment, the adjustment plate, the piston tube and the oil cylinder are fixed together by fixing ears on the outer wall, which is convenient for disassembly and maintenance.

Claims

1. Gas-liquid variable force spring, characterized in that: It includes a cylindrical cylinder with an air inlet on the top of the cylinder, a cylindrical piston tube connected to the bottom of the cylinder, a plurality of plug channels penetrating from top to bottom on the piston tube, and the bottom of the plug channel is closed by a valve plate of an electromagnetic valve; the piston is arranged in the inner cavity of the cylinder, the piston is composed of a plug plate on the top and a plurality of plug rods on the bottom, the plug rods extend into each plug channel respectively, and the plug pads at the lower ends of the plug rods cooperate with the plug channels; a funnel-shaped oil cylinder is connected to the bottom of the piston tube, the oil cylinder is filled with hydraulic oil, and an oil plug is arranged in the oil pipe below the oil cylinder.

2. The gas-liquid variable force spring according to claim 1, characterized in that: The inner wall of the top end of the plug channel is provided with a limiting convex ring protruding inwards.

3. The gas-liquid variable force spring according to claim 1, characterized in that: The plug channel comprises a main plug channel arranged at the center of the piston tube and an adjusting channel distributed around the main plug channel. The valve plate of the solenoid valve closes the lower end of the adjusting channel.

4. The gas-liquid variable force spring according to claim 1 or 3, characterized in that: An adjusting plate is additionally arranged between the piston tube and the oil cylinder, a valve hole cooperating with the plug channel is arranged on the adjusting plate, and the electromagnetic valve is arranged near the valve hole of the adjusting plate.

5. The gas-liquid variable force spring according to claim 4, characterized in that: The solenoid valve has a structure in which a valve stem penetrates into a valve hole from the outside of an adjusting plate, a valve plate is provided on the inner end of the valve stem to seal the valve hole, the outer end of the valve stem is connected to an output end of a motor, and the motor controls the rotation of the valve stem to open and close the valve hole.

6. The gas-liquid variable force spring according to claim 5, characterized in that: The outer wall of the regulating plate is provided with fixing ears at intervals, and an annular plate is fixed through the fixing ears. Motors are fixed at intervals on the annular plate, and the output end of the motor is connected to the outer end of the valve stem.

7. The gas-liquid variable force spring according to claim 4, characterized in that: The regulating plate, piston tube and oil cylinder are fixed together by fixing ears on the outer wall, or are integrally formed.

8. The gas-liquid variable force spring according to claim 1, characterized in that: The oil plug comprises an oil plug column, an oil plug pad matching the inner diameter of the oil pipe is arranged on the top of the oil plug column, and a limiting convex ring protruding inwards is arranged on the inner wall of the bottom of the oil pipe.

9. The gas-liquid variable force spring according to claim 1, characterized in that: The plug plate, plug pad, valve plate and outer edge are provided with sealing rings, and the junction of the cylinder and the piston tube is provided with a sealing ring.

10. The gas-liquid variable force spring according to claim 3, characterized in that: The solenoid valve has a structure in which a valve stem penetrates into the regulating channel from the outside of the piston tube, a valve plate is provided on the inner end of the valve stem to seal the regulating channel, the outer end of the valve stem is connected to the output end of the motor, and the motor controls the rotation of the valve stem to open and close the regulating channel.

Images