Variable stiffness spring without power source
By using a variable stiffness spring structure without a power source and controlling the flow of the medium with solenoid valves and sensors, the stiffness of the air spring can be infinitely adjusted, solving the problems of power source dependence and high cost in existing technologies, and achieving energy-saving and compact stiffness adjustment effects.
Patent Information
- Application Number
- CN202520416025.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing methods for adjusting the stiffness of air springs require a power source, have complex structures and high costs, and the adjustment method is stepped, which cannot achieve stepless adjustment.
It adopts a variable stiffness spring structure without a power source, and controls the flow of the medium between the independent main chamber and the auxiliary chamber through a solenoid valve. Combined with the real-time adjustment of the solenoid valve state by the sensor, the stiffness can be infinitely adjusted.
It achieves stepless adjustment of air spring stiffness, saves energy, reduces manufacturing costs, improves vehicle range, and has a compact structure.
Smart Images
Figure CN223676877U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to air spring accessories field, especially relate to a no power source variable stiffness spring. BACKGROUND
[0002] At present, the air spring stiffness adjusting mode on the market is basically according to the mode of changing volume, that is, using electromagnetic valve to control the communication of air spring main cavity and additional cavity, and changing the volume of air spring assembly, and this adjusting mode belongs to step adjusting, that is, one electromagnetic valve can have two stiffness, and two electromagnetic valves can have four stiffness, and there is also the mode of changing the air spring stiffness by using the shape of additional air bag after pressurization, but all need to use power source to pressurize additional air bag, and some no power source stiffness adjusting modes of air spring are relatively complex in structure and high in manufacturing cost. SUMMARY
[0003] The utility model discloses a kind of no power source variable stiffness springs of compact structure and low cost.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme: a no power source variable stiffness spring, it includes:
[0005] Air spring main body, it includes air spring piston, main bag skin set on the air spring piston, additional bag skin set on the air spring piston and at least partially adhered with the main bag skin, the main bag skin and the air spring piston form main cavity, the additional bag skin and the air spring piston form additional cavity, the main cavity and the additional cavity are relatively independent, main cavity is filled with first medium, additional cavity is filled with second medium;
[0006] The variable stiffness spring further includes:
[0007] Energy accumulator, it includes energy storage cavity, energy storage piston installed in the energy storage cavity, sensor for detecting energy storage piston position, the energy storage piston divides the energy storage cavity into energy storage upper cavity and energy storage lower cavity, energy storage upper cavity is filled with second medium, energy storage lower cavity is filled with third medium;
[0008] Electromagnetic valve, it is connected between the additional cavity and energy storage upper cavity, it is used to control the flow of second medium in energy storage upper cavity and additional cavity to adjust the stiffness of the variable stiffness spring;
[0009] When needing to increase stiffness: because of the up and down action of variable stiffness spring when vehicle is running on road, valve position that can only send second medium from energy storage upper cavity to additional cavity is connected, additional cavity is filled with second medium by energy accumulator, additional bag skin is repeatedly extruded and expanded, so that second medium in energy storage upper cavity is absorbed into additional cavity, thereby increasing the degree of inflation of additional bag skin, and the effect of increasing stiffness is achieved;
[0010] When the stiffness needs to be reduced: the valve position that can only send the second medium from the additional cavity to the energy storage upper cavity is turned on, the energy storage upper cavity is filled with the second medium through the additional cavity, the additional cavity is repeatedly squeezed, and thus the second medium in the additional cavity is pressed into the energy storage upper cavity, so as to reduce the degree of bulging of the main capsule skin and achieve the effect of reducing the stiffness.
[0011] When the stiffness needs to be maintained, the electromagnetic valve is closed, and the additional cavity and the energy storage upper cavity are disconnected.
[0012] In another embodiment, the sensor is a laser displacement sensor, which can accurately detect the position change of the air spring piston, and adjust the connection state of the electromagnetic valve in real time according to the need for stiffness change.
[0013] In another embodiment, the electromagnetic valve is a three-position two-way electromagnetic valve, which has three working positions, respectively, a valve position that can only send the second medium from the energy storage upper cavity to the additional cavity, a valve position that disconnects the additional cavity and the energy storage upper cavity, and a valve position that can only send the second medium from the additional cavity to the energy storage upper cavity.
[0014] In another embodiment, the first medium is air, and the use of air as the medium can reduce the difficulty of obtaining the medium.
[0015] In another embodiment, the second medium is hydraulic oil, which can provide sufficient stiffness.
[0016] In another embodiment, the third medium is high-pressure nitrogen, which has a large volume compression ratio, can increase the volume change range of the auxiliary cavity and the energy storage upper cavity, and thus increase the stiffness change range.
[0017] In another embodiment, the energy storage device includes an energy storage box, the energy storage piston is arranged in the energy storage box, and the sensor is arranged on the energy storage box. Embedding the sensor on the energy storage box can further improve the compactness of the overall structure.
[0018] In another embodiment, the main capsule skin is sleeved on the lower end of the air spring piston, the lower end of the air spring piston is concave upward, and the space formed by the concave is in communication with the main cavity. Without increasing the volume of the capsule skin in the natural state, the volume of the main cavity is sufficiently increased.
[0019] In another embodiment, the energy storage cavity is formed inside the air spring piston, and the electromagnetic valve is arranged on the side wall of the air spring piston covered by the auxiliary capsule skin. The energy storage upper cavity and the energy storage lower cavity are arranged in the air spring piston, which further improves the compactness of the overall structure.
[0020] In another embodiment, the electromagnetic valve is a two-position two-way electromagnetic valve.
[0021] The utility model discloses a beneficial effect lies in: the utility model discloses the rigidity of air spring is realized stepless adjustment, and the rigidity adjustment of air spring is realized without the special power source drive, saves energy, improves the vehicle endurance, and the compact structure reduces the cost of manufacture. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is the structural schematic diagram of no power source variable stiffness spring in example one.
[0023] Figure 2 It is the structural schematic diagram of no power source variable stiffness spring in example two. DETAILED DESCRIPTION
[0024] The utility model discloses the following detailed description in combination with the embodiment shown in the drawing:
[0025] Example one
[0026] As Figure 1 Shown, no power source variable stiffness spring includes: air spring main body 1, energy accumulator 2 and solenoid valve 3.
[0027] Air spring main body 1 includes air spring piston 11, the main capsule skin 12 of being arranged on air spring piston 11, the additional capsule skin 13 of being arranged on air spring piston 11 and at least partially with main capsule skin 12 adhere, the main cavity 14 of being formed between main capsule skin 12 and air spring piston 11, the additional cavity 15 of being formed between additional capsule skin 13 and air spring piston 11, main cavity 14 and additional cavity 15 are opposite and independent, the first medium 41 of being filled in main cavity 14, the second medium 42 of being filled in additional cavity 15, main capsule skin 12 is set on the lower end of air spring piston 11, the lower end of air spring piston 11 is concave upwards and the space formed by concave communicates with main cavity 14, under the premise of not increasing the volume of capsule skin natural state, sufficiently improve the volume of main cavity 14.
[0028] Energy accumulator 2 includes energy storage cavity 20, installs the energy storage piston 23 in energy storage cavity 20, the sensor 24 for detecting the position of energy storage piston 23, energy storage piston 23 divides energy storage cavity 20 into energy storage upper cavity 21 and energy storage lower cavity 22, the second medium 42 is filled in energy storage upper cavity 21, the third medium 43 is filled in energy storage lower cavity 22.Specifically: sensor 24 is laser displacement sensor, can accurately detect the position change of air spring piston 11, in combination with the need of rigidity change, real-time adjustment solenoid valve 3's intercommunication state. Energy accumulator 2 includes energy storage box 25, and energy storage piston 23 is arranged in energy storage box 25, and sensor 24 is arranged on energy storage box 25, and sensor 24 is embedded on energy storage box 25, which can further improve the compactness of the overall structure.
[0029] The electromagnetic valve 3 is connected between the additional cavity 15 and the energy storage upper cavity 21 through the pipeline 5 and the channel 16 opened in the air spring piston, and is used to control the flow of the second medium 42 in the energy storage upper cavity 21 and the additional cavity 15 to adjust the stiffness of the variable stiffness spring. The electromagnetic valve 3 is a three-position two-way electromagnetic valve, which has three working positions, respectively, a valve position capable of sending the second medium 42 from the energy storage upper cavity 21 to the additional cavity 15, a valve position disconnecting the additional cavity 15 and the energy storage upper cavity 21, and a valve position capable of sending the second medium 42 from the additional cavity 15 to the energy storage upper cavity 21.
[0030] The first medium 41 is air, and the use of air as the medium can reduce the difficulty of obtaining the medium; the second medium 42 is hydraulic oil, which can provide sufficient stiffness; and the third medium 43 is high-pressure nitrogen, which has a large volume compression ratio and can increase the volume change range of the auxiliary cavity and the energy storage upper cavity 21, thereby increasing the stiffness change range.
[0031] When the stiffness needs to be increased: because the variable stiffness spring is subjected to upward and downward actions when the vehicle is running on the road, the valve position capable of sending the second medium 42 from the energy storage upper cavity 21 to the additional cavity 15 is connected, the additional cavity 15 is filled with the second medium 42 by the accumulator 2, the auxiliary bladder skin 13 is repeatedly squeezed and expanded, and the second medium 42 in the energy storage upper cavity 21 is sucked into the additional cavity 15, thereby increasing the degree of inflation of the auxiliary bladder skin 13 and achieving the effect of increasing the stiffness;
[0032] When the stiffness needs to be reduced: the valve position capable of sending the second medium 42 from the additional cavity 15 to the energy storage upper cavity 21 is connected, the energy storage upper cavity 21 is filled with the second medium 42 by the additional cavity 15, the additional cavity 15 is repeatedly squeezed, and the second medium 42 in the additional cavity 15 is pressed into the energy storage upper cavity 21, thereby reducing the degree of inflation of the auxiliary bladder skin 13 and achieving the effect of reducing the stiffness.
[0033] When the stiffness needs to be maintained, the electromagnetic valve 3 is closed, and the additional cavity 15 and the energy storage upper cavity 21 are disconnected.
[0034] Example Two
[0035] As shown in Figure 2 , the variable stiffness spring without a power source comprises an air spring body 1, an accumulator 2, and an electromagnetic valve 3.
[0036] The air spring main body 1 comprises an air spring piston 11, a main capsule skin 12 arranged on the air spring piston 11, an additional capsule skin 13 arranged on the air spring piston 11 and at least partially attached to the main capsule skin 12, a main cavity 14 formed between the main capsule skin 12 and the air spring piston 11, an additional cavity 15 formed between the additional capsule skin 13 and the air spring piston 11, the main cavity 14 and the additional cavity 15 being relatively independent, the main cavity 14 being filled with a first medium 41 and the additional cavity 15 being filled with a second medium 42, the main capsule skin 12 being sleeved on the lower end of the air spring piston 11, the lower end of the air spring piston 11 being concave upward and the concave space being communicated with the main cavity 14, and the volume of the main cavity 14 being sufficiently increased without increasing the volume of the capsule skin in the natural state.
[0037] The accumulator 2 comprises an accumulator cavity 20, an accumulator piston 23 arranged in the accumulator cavity 20, and a sensor 24 for detecting the position of the accumulator piston 23, the accumulator piston 23 dividing the accumulator cavity 20 into an accumulator upper cavity 21 and an accumulator lower cavity 22, the accumulator upper cavity 21 being filled with the second medium 42 and the accumulator lower cavity 22 being filled with a third medium 43. Specifically, the sensor 24 is a laser displacement sensor, which can accurately detect the position change of the air spring piston 11 and adjust the communication state of the electromagnetic valve 3 in real time according to the need of stiffness change. The accumulator cavity 20 is formed inside the air spring piston 11, the electromagnetic valve 3 is arranged on the side wall of the air spring piston 11 covered by the auxiliary capsule skin, the accumulator upper cavity 21 and the accumulator lower cavity 22 are arranged in the air spring piston 11, and the compactness of the overall structure is further improved. The electromagnetic valve 3 is a two-position two-way electromagnetic valve.
[0038] The electromagnetic valve 3 is connected between the additional cavity 15 and the accumulator upper cavity 21, and is used for controlling the flow of the second medium 42 in the accumulator upper cavity 21 and the additional cavity 15 to adjust the stiffness of the variable stiffness spring. The electromagnetic valve 3 is a two-position two-way electromagnetic valve, which has two working positions, respectively, a valve position for sending out the second medium 42 from the accumulator upper cavity 21 to the additional cavity 15 and a valve position for sending out the second medium 42 from the additional cavity 15 to the accumulator upper cavity 21.
[0039] The first medium 41 is air, and the use of air as the medium can reduce the difficulty of obtaining the medium; the second medium 42 is hydraulic oil, which can provide sufficient stiffness, and the accumulator piston 23 is always below the electromagnetic valve 3 during the compression of the hydraulic oil; the third medium 43 is high-pressure nitrogen, which has a large volume compression ratio and can increase the volume change range of the auxiliary cavity and the accumulator upper cavity 21, thereby increasing the stiffness change range.
[0040] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit of the present application should be covered within the protection scope of the present application.
Claims
1. A passive stiffness variable spring, comprising: a spring body comprising a spring piston, a main bladder skin arranged on the spring piston, an additional bladder skin arranged on the spring piston and at least partially attached to the main bladder skin, a main cavity formed between the main bladder skin and the spring piston, an additional cavity formed between the additional bladder skin and the spring piston, the main cavity and the additional cavity being relatively independent, the main cavity being filled with a first medium, the additional cavity being filled with a second medium; characterized in that the stiffness variable spring further comprises: an accumulator comprising an accumulator cavity, an accumulator piston arranged in the accumulator cavity, a sensor for detecting the position of the accumulator piston, the accumulator piston dividing the accumulator cavity into an upper accumulator cavity and a lower accumulator cavity, the upper accumulator cavity being filled with the second medium, the lower accumulator cavity being filled with a third medium; a solenoid valve connected between the additional cavity and the upper accumulator cavity, for controlling the flow of the second medium in the upper accumulator cavity and the additional cavity to adjust the stiffness of the stiffness variable spring.
2. The passive source-free variable stiffness spring of claim 1, wherein: The sensor is a laser displacement sensor.
3. The passive source-free variable stiffness spring of claim 1, wherein: The solenoid valve is a three-position two-way solenoid valve.
4. The passive source-free variable stiffness spring of claim 1, wherein: The first medium is air.
5. The passive source-free variable stiffness spring of claim 1, wherein: The second medium is hydraulic oil.
6. The passive source-free variable stiffness spring of claim 1, wherein: The third medium is high-pressure nitrogen.
7. The passive source-free variable stiffness spring of claim 1, wherein: The accumulator comprises an accumulator box, the accumulator piston is arranged in the accumulator box, and the sensor is arranged on the accumulator box.
8. The passive source-free variable stiffness spring of claim 1, wherein: The main bladder skin is sleeved on the lower end of the spring piston, the lower end of the spring piston is concave upward, and the space formed by the concave is communicated with the main cavity.
9. The passive source-free variable stiffness spring of claim 1, wherein: The accumulator cavity is formed inside the spring piston, and the solenoid valve is arranged on the side wall of the spring piston covered by the additional bladder skin.
10. The passive source-free variable stiffness spring of claim 9, wherein: The solenoid valve is a two-position two-way solenoid valve.