Rigidity adjusting valve for multi-cavity air spring for passenger car

Abstract

The invention belongs to the technical field of vehicle control, and particularly relates to a stiffness regulating valve for a multi-cavity air spring for a passenger car, comprising a communicating air passage, one end of the communicating air passage is used for communicating with the air spring, the side wall of the communicating air passage is provided with an air port, and the joint of the communicating air passage and the air spring is provided with a first sealing part; the rigidity valve shell is fixedly connected to the other end of the communicating air channel, the communicating air channel and the rigidity valve shell are provided with second sealing parts, and the air port is located on the outer side of the rigidity valve shell; the piston is used for controlling the opening degree of the air port, the piston is arranged in the communicating air channel in a sliding mode, and a third sealing part is arranged between the communicating air channel and the piston; the sliding driving part is used for driving the piston to slide in the communicating air channel; the output end of the speed reduction part is in transmission connection with the sliding driving part; the input end of the driving part is in transmission connection with the input end of the speed reduction part. When the air spring is used, the opening degree of the air port is controlled by driving the piston to move in the communicating air channel, and then the rigidity of the air spring is adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle control, and in particular relates to a stiffness regulating valve for a multi-cavity air spring for a passenger car. Background Art

[0002] Vehicle control. The current development trend of automobile suspension is towards air suspension and electronically controlled suspension. Because air suspension can greatly improve ride comfort, it is loved by the majority of OEMs and customers. At present, air springs must be used in the use of air suspension. However, while air springs improve ride comfort, the stiffness of air springs cannot be adjusted. Therefore, lateral support cannot be provided for air suspension, which inevitably brings about the problem of reduced handling stability of air suspension, reducing handling stability and safety.

[0003] Therefore, there is an urgent need for a stiffness regulating valve for a multi-chamber air spring for a passenger car. Summary of the invention

[0004] The object of the present invention is to provide a stiffness regulating valve for a multi-chamber air spring for a passenger car to solve the above-mentioned problem.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A stiffness regulating valve for a multi-chamber air spring for a passenger car, comprising:

[0007] A communicating air passage, one end of which is used to communicate with an air spring, a side wall of the communicating air passage is provided with an air port, and a first sealing portion is provided at the connection between the communicating air passage and the air spring;

[0008] A rigidity valve housing is fixedly connected to the other end of the communicating air passage, the communicating air passage and the rigidity valve housing are provided with a second sealing portion, and the air port is located outside the rigidity valve housing;

[0009] A piston, used to control the opening size of the gas port, the piston is slidably disposed in the communicating air passage, and a third sealing portion is provided between the communicating air passage and the piston;

[0010] A sliding driving part, used for driving the piston to slide in the communicating air passage;

[0011] A speed reduction unit, the output end of which is drivingly connected to the sliding drive unit;

[0012] The driving part has an input end which is drivingly connected to the input end of the speed reducing part.

[0013] Optionally, the driving unit includes a stiffness valve motor, and the stiffness valve motor is fixedly connected in the stiffness valve housing.

[0014] Optionally, the deceleration part includes a planetary reduction gear set, the input end of the planetary reduction gear set is axially connected to the output end of the stiffness valve motor, the output end of the planetary reduction gear set is transmission-connected to the sliding drive part, and the fixed end of the planetary reduction gear set is fixedly connected in the stiffness valve housing.

[0015] Optionally, the sliding drive unit includes a lead screw, one end of which is axially connected to the output end of the planetary reduction gear set, and the lead screw is threadedly connected to the piston;

[0016] The lead screw is a trapezoidal lead screw, and the piston is a trapezoidal nut.

[0017] Optionally, the sliding drive unit is a ball ramp structure;

[0018] The ball ramp structure comprises an upper ball ramp axially connected to the output end of the planetary reduction gear set, the upper ball ramp is drivingly connected to a lower ball ramp, the lower ball ramp is slidably arranged in the rigidity valve housing, and the upper ball ramp is used to drive the lower ball ramp to slide in the rigidity valve housing;

[0019] A ball is arranged between the upper ball ramp and the lower ball ramp, and a ball slide for rolling the ball is arranged on both the upper ball ramp and the lower ball ramp, and the ball slide has a slope, and a connecting block is axially connected to the side of the lower ball ramp away from the upper ball ramp, and the connecting block is slidably arranged in the piston, a secondary spring is arranged between the piston and the connecting block, and a primary spring is arranged between the piston and the communicating air passage.

[0020] Optionally, the first sealing portion includes a rigid valve cavity sealing ring, which is embedded in the outer side of the connecting air passage and is used for sealing the connection between the connecting air passage and the air spring.

[0021] Optionally, the second sealing portion includes an airway sealing ring, which is embedded in the outer side of the connecting airway and is used for sealing between the connecting airway and the rigidity valve housing.

[0022] Optionally, the third sealing portion includes a piston sealing ring, which is embedded on the outer side of the piston and is used to seal between the piston and the communicating air passage.

[0023] Optionally, two piston sealing rings are provided.

[0024] Optionally, a sealing ring is embedded on the outer side of the rigidity valve housing.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] When in use, the sliding drive unit drives the piston to move in the communicating air passage to control the opening size of the air port, thereby controlling the intake and exhaust speeds and further adjusting the stiffness of the air spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0028] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention when the airway is in an open state;

[0029] Figure 2 This is a schematic diagram of the structure of Example 1 of the present invention when the airway is in a closed state;

[0030] Figure 3 This is a schematic diagram of the structure of Example 2 of the present invention when the airway is in an open state;

[0031] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention when the airway is in a closed state;

[0032] Among them, 1. Rigidity valve housing; 2. Rigidity valve motor; 3. Sealing ring; 4. Planetary reduction gear set; 5. Screw; 6. Piston; 7. Connecting airway; 8. Piston sealing ring; 9. Airway sealing ring; 10. Sealing ring between rigidity valve chambers; 11. Upper ball ramp; 12. Lower ball ramp; 13. Primary spring; 14. Secondary spring; 15. Ball; 16. Connecting block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The air spring referred to in this embodiment refers to a sealed container filled with compressed air, which uses the compressibility of gas to achieve its elastic effect.

[0036] The air spring has ideal nonlinear elastic characteristics. After adding a height adjustment device, the vehicle body height does not change with the increase or decrease of load. The spring stiffness can be designed to be lower, and the ride comfort is good.

[0037] Its working principle is to fill the closed pressure cylinder with inert gas or oil-gas mixture, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure, and use the pressure difference generated by the cross-sectional area of ​​the piston rod being smaller than the cross-sectional area of ​​the piston to achieve the movement of the piston rod. Due to the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow speed, small change in dynamic force (generally within 1:1.2), and easy control; the disadvantage is that the relative volume is not as small as the coil spring, the cost is high, and the life is relatively short.

[0038] Air springs are widely used in self-adjusting air suspensions for commercial vehicles, buses, rail vehicles, machinery and equipment, and building bases. Gas springs are also called support rods, angle adjusters, gas pressure rods, dampers, etc. According to the structure and function of gas springs, there are several types of gas springs, such as free-style gas springs, self-locking gas springs, traction gas springs, random stop gas springs, swivel chair gas springs, gas pressure rods, dampers, etc. This product is widely used in the fields of automobiles, aviation, medical equipment, furniture, and machinery manufacturing.

[0039] The principle of the air spring stiffness control valve is to adjust the stiffness of the air spring by changing the size of the gas channel.

[0040] Embodiment 1:

[0041] Reference Figure 1 to Figure 2 The present invention discloses a stiffness regulating valve for a multi-chamber air spring for a passenger vehicle, comprising:

[0042] A connecting air channel 7, one end of which is used to communicate with the air spring, a side wall of the connecting air channel 7 is provided with an air port, and a first sealing portion is provided at the connection between the connecting air channel 7 and the air spring;

[0043] The rigid valve housing 1 is fixedly connected to the other end of the communicating air passage 7. The communicating air passage 7 and the rigid valve housing 1 are provided with a second sealing portion. The air port is located outside the rigid valve housing 1.

[0044] The piston 6 is used to control the opening size of the air port. The piston 6 is slidably arranged in the communicating air passage 7. A third sealing portion is arranged between the communicating air passage 7 and the piston 6.

[0045] A sliding driving part, used for driving the piston 6 to slide in the communicating air passage 7;

[0046] A speed reduction unit, the output end of which is drivingly connected to the sliding drive unit;

[0047] The driving part has an input end which is drivingly connected to the input end of the speed reducing part.

[0048] When in use, the communicating air passage 7 is respectively connected to two different chambers of the air spring.

[0049] When in use, the piston 6 is driven by the sliding drive unit to move in the communicating air passage 7 to control the opening size of the air port, thereby controlling the intake and exhaust speeds and further adjusting the stiffness of the air spring.

[0050] As an optional implementation, the driving unit includes a stiffness valve motor 2 , and the stiffness valve motor 2 is fixedly connected in the stiffness valve housing 1 .

[0051] As an optional embodiment, the deceleration part includes a planetary reduction gear set 4, the input end of the planetary reduction gear set 4 is axially connected to the output end of the stiffness valve motor 2, the output end of the planetary reduction gear set 4 is transmission-connected to the sliding drive part, and the fixed end of the planetary reduction gear set 4 is fixedly connected in the stiffness valve housing 1.

[0052] As an optional embodiment, the sliding drive unit includes a lead screw 5 , one end of which is axially connected to the output end of the planetary reduction gear set 4 , and the lead screw 5 is threadedly connected to the piston 6 .

[0053] The piston 6 can be driven to slide in the communicating air passage 7 by the threaded cooperation between the lead screw 5 and the piston 6, and the lead screw 5 and the piston 6 have a self-locking function. When the air port opening remains consistent, the piston 6 is naturally maintained at the specified position without consuming energy.

[0054] As an optional embodiment, the first sealing portion includes a rigid valve cavity sealing ring 10, which is embedded in the outer side of the connecting air passage 7 and is used for sealing the connection between the connecting air passage 7 and the air spring.

[0055] As an optional implementation, the second sealing portion includes an airway sealing ring 9 , which is embedded in the outer side of the connecting airway 7 , and is used to seal between the connecting airway 7 and the rigidity valve housing 1 .

[0056] As an optional implementation, the third sealing portion includes a piston sealing ring 8 , which is embedded in the outer side of the piston 6 , and is used for sealing between the piston 6 and the communicating air passage 7 .

[0057] As an optional implementation, two piston sealing rings 8 are provided.

[0058] As an optional implementation, the lead screw 5 is a trapezoidal lead screw, and the piston 6 is a trapezoidal nut.

[0059] As an optional implementation, a sealing ring 3 is embedded on the outer side of the rigid valve housing 1 .

[0060] The working principle of the present invention is: by adopting "motor + planetary reduction gear set + trapezoidal lead screw structure" to replace the traditional "electromagnetic coil + dynamic and static iron core" structure, the switching function is realized, the noise problem is effectively solved, and the cost is reduced.

[0061] The stiffness valve motor 2 is powered on and rotated upon receiving a request, driving the planetary reduction gear set 4 and the lead screw 5 connected thereto to rotate, thereby driving the piston 6 to move up and down, realizing the adjustment of the air port opening to control the intake and exhaust speed.

[0062] When the original solenoid valve is closed, the moving iron core quickly impacts the static iron core, which will produce a lot of impact noise. This structural stiffness valve can adjust the impact speed when the valve is closed, which can effectively reduce the noise.

[0063] The screw 5 and the piston 6 of this structure cooperate with each other to have a self-locking function, and can cut off the power supply after the valve is closed, thus saving energy consumption.

[0064] The screw 5 and the piston 6 cooperate to adjust the size of the throttle hole between fully open and fully closed, and have the functional properties of a linear valve.

[0065] Embodiment 2:

[0066] refer to Figure 3-4 , the difference between this embodiment and embodiment 1 is that the sliding drive part is a ball ramp structure;

[0067] The ball ramp structure includes an upper ball ramp 11 axially connected to the output end of the planetary reduction gear set 4, the upper ball ramp 11 is drivingly connected to a lower ball ramp 12, the lower ball ramp 12 is slidably arranged in the rigidity valve housing 1, and the upper ball ramp 11 is used to drive the lower ball ramp 12 to slide in the rigidity valve housing 1;

[0068] A ball 15 is provided between the upper ball ramp 11 and the lower ball ramp 12. A ball slideway for rolling the ball 15 is provided on both the upper ball ramp 11 and the lower ball ramp 12. The ball slideway has a slope. A connecting block 16 is axially connected to the side of the lower ball ramp 12 away from the upper ball ramp 11. The connecting block 16 is slidably arranged in the piston 6. A secondary spring 14 is provided between the piston 6 and the connecting block 16. A primary spring 13 is provided between the piston 6 and the communicating air passage 7.

[0069] By driving the upper ball ramp 11 to rotate, the upper ball ramp 11 rotates to push the ball 15 to move along the circumference of the ball ramp, the lower ball ramp 12 and the rigidity valve housing 1 are axially slidingly matched, and the lower ball ramp 12 and the rigidity valve housing 1 are radially limited. Under the action of the ball 15, the lower ball ramp 12 and the connecting block 16 are pushed to move, and the connecting block 16 slides in the piston 6, and pushes the piston 6 to move to close the air port through the secondary spring 14. When the piston 6 moves, the secondary spring 14 between the piston 6 and the connecting air channel 7 is also compressed until the air port is closed. At this time, the upper ball ramp 11 continues to rotate, so that the lower ball ramp 12 drives the connecting block 16 to continue to squeeze the secondary spring 14 until the sealing force requirement is met. When the air port needs to be punched, the upper ball ramp 11 can be reversed.

[0070] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0071] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A stiffness regulating valve for a multi-chamber air spring for a passenger car, characterized in that: include: A communicating air channel (7), one end of the communicating air channel (7) being used for communicating with an air spring, a side wall of the communicating air channel (7) being provided with an air port, and a first sealing portion being provided at a connection between the communicating air channel (7) and the air spring; A rigidity valve housing (1) is fixedly connected to the other end of the communicating air passage (7), the communicating air passage (7) and the rigidity valve housing (1) are provided with a second sealing portion, and the air port is located outside the rigidity valve housing (1); A piston (6) is used to control the opening size of the gas port, the piston (6) is slidably arranged in the communicating air passage (7), and a third sealing portion is provided between the communicating air passage (7) and the piston (6); A sliding drive unit, used for driving the piston (6) to slide in the communicating air passage (7); A speed reduction unit, the output end of which is drivingly connected to the sliding drive unit; The driving part has an input end which is drivingly connected to the input end of the speed reducing part.

2. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 1, characterized in that: The driving part comprises a stiffness valve motor (2), and the stiffness valve motor (2) is fixedly connected in the stiffness valve housing (1).

3. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 2, characterized in that: The deceleration unit comprises a planetary reduction gear set (4), the input end of the planetary reduction gear set (4) is axially connected to the output end of the stiffness valve motor (2), the output end of the planetary reduction gear set (4) is transmission-connected to the sliding drive unit, and the fixed end of the planetary reduction gear set (4) is fixedly connected in the stiffness valve housing (1).

4. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 3, characterized in that: The sliding drive unit comprises a lead screw (5), one end of which is axially connected to the output end of the planetary reduction gear set (4), and the lead screw (5) is threadedly connected to the piston (6); The lead screw (5) is a trapezoidal lead screw, and the piston (6) is a trapezoidal nut.

5. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 3, characterized in that: The sliding drive part is a ball ramp structure; The ball ramp structure comprises an upper ball ramp (11) axially connected to the output end of the planetary reduction gear set (4); the upper ball ramp (11) is drivingly connected to a lower ball ramp (12); the lower ball ramp (12) is slidably arranged in the rigidity valve housing (1); the upper ball ramp (11) is used to drive the lower ball ramp (12) to slide in the rigidity valve housing (1); A ball (15) is arranged between the upper ball ramp (11) and the lower ball ramp (12); a ball slideway for rolling the ball (15) is arranged on both the upper ball ramp (11) and the lower ball ramp (12); the ball slideway has a slope; a connecting block (16) is axially connected to a side of the lower ball ramp (12) away from the upper ball ramp (11); the connecting block (16) is slidably arranged in the piston (6); a secondary spring (14) is arranged between the piston (6) and the connecting block (16); and a primary spring (13) is arranged between the piston (6) and the communicating air passage (7).

6. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 1, characterized in that: The first sealing portion comprises a rigid valve cavity sealing ring (10), the rigid valve cavity sealing ring (10) being embedded on the outside of the connecting air passage (7), and the rigid valve cavity sealing ring (10) being used for sealing the connection between the connecting air passage (7) and the air spring.

7. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 1, characterized in that: The second sealing portion comprises an airway sealing ring (9), the airway sealing ring (9) being embedded on the outside of the connecting airway (7), and the airway sealing ring (9) being used for sealing between the connecting airway (7) and the rigidity valve housing (1).

8. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 1, characterized in that: The third sealing portion comprises a piston sealing ring (8), wherein the piston sealing ring (8) is embedded on the outer side of the piston (6), and the piston sealing ring (8) is used for sealing between the piston (6) and the communicating air passage (7).

9. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 8, characterized in that: The piston sealing ring (8) is provided with two rings.

10. The stiffness regulating valve for a multi-chamber air spring for a passenger vehicle according to claim 1, characterized in that: A sealing ring (3) is embedded on the outer side of the rigid valve housing (1).

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