Rigidity-adjustable air spring

Abstract

The rigidity-adjustable air spring comprises a seat body and a leather bag, the seat body comprises a first connecting piece and a second connecting piece, and an air spring structure with an air bag cavity in the middle is defined by the first connecting piece, the second connecting piece and the leather bag; a partition plate is arranged in the middle of the air bag cavity and divides the air bag cavity into an upper air bag cavity and a lower adjusting cavity. At least two capacity increasing cavities are arranged in the lower adjusting cavity, at least one capacity increasing cavity is communicated with the upper air bag cavity, and the internal volume of the capacity increasing cavity can be adjusted; the at least one capacity increasing cavity and the upper air bag cavity can be controlled to be communicated or separated. The internal volume of the air spring can be adjusted and changed, and the rigidity of the air spring can be changed by adjusting the internal volume.

Description

Technical Field

[0001] The invention relates to the field of air springs, in particular to an air spring with adjustable stiffness. Background Art

[0002] Air springs use the compressibility of air to achieve elastic support and vibration isolation. Specifically, it is an industrial accessory that can perform functions such as support, buffering, braking, height adjustment and angle adjustment by filling compressed air in a closed container to give the air spring a certain degree of elasticity and support.

[0003] After searching, it was found that a new type of air spring seat and its air spring were disclosed in the invention patent with Chinese patent publication number CN116464729A. The air spring seat uses a sliding bearing to change the mutual movement between the air spring piston and the air spring seat from the original hard friction to a sliding movement mode, thereby increasing the wear resistance of the air spring piston. However, since the stiffness of the air spring is controllable and variable, the vibration frequency can be lowered. However, the internal volume of the air spring is fixed, so the stiffness of the air spring cannot be changed by adjusting the internal volume. Therefore, an air spring with variable stiffness is proposed. Summary of the invention

[0004] In order to overcome at least one of the above problems, the present invention provides an air spring with adjustable stiffness, which can adjust and change the internal volume of the air spring, and the stiffness of the air spring can be changed by adjusting the internal volume.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an air spring with adjustable stiffness, comprising a seat body and a bladder, the seat body comprising a first connecting member and a second connecting member, the first connecting member, the second connecting member and the bladder together forming an air spring structure with an airbag cavity in the middle;

[0006] A partition plate is provided in the middle of the airbag cavity, and the partition plate divides the airbag cavity into an upper airbag cavity and a lower adjustment cavity; a hoop is provided on the outer side of the airbag cavity, and the hoop corresponds to the partition plate, and the hoop presses the leather bag tightly, so that the leather bag and the partition plate are sealed and tightly attached;

[0007] The lower adjustment cavity contains at least two volume expansion cavities, at least one volume expansion cavity is connected to the upper airbag cavity, and the internal volume of the volume expansion cavity can be adjusted; at least one volume expansion cavity can be controlled to be connected or isolated from the upper airbag cavity.

[0008] Preferably, an inner partition and an outer partition are provided in the lower adjustment cavity, and the upper and lower ends of the inner partition and the outer partition are respectively connected to the partition plate and the second connecting piece; the inner partition, the outer partition, the partition plate and the second connecting piece together form a second volume expansion cavity with adjustable internal volume; the inner partition and the partition plates at the upper and lower ends and the second connecting piece together form a first volume expansion cavity which can be controllably connected or isolated with the upper airbag cavity.

[0009] Preferably, the upper part of the second volume expansion cavity is connected to the upper airbag cavity, and a lifting adjustment plate is provided in the second volume expansion cavity. The two sides of the lifting adjustment plate are tightly sealed with the inner partition and the outer partition, so that an adjustable second volume expansion cavity is formed on the upper part of the lifting adjustment plate. When the lifting adjustment plate rises, the adjustment cavity is compressed; otherwise, the adjustment cavity is enlarged.

[0010] Preferably, the second capacity expansion chamber is provided with an adjustment mechanism, including at least one threaded screw and a drive motor, the upper and lower ends of the threaded screw can be rotatably installed between the partition plate and the second connecting piece; the threaded screw passes through the middle part of the lifting adjustment plate and is screwed to the lifting adjustment plate, and the lifting adjustment plate can be lifted up and down by rotating the threaded screw; the threaded screw passes through the lower end of the second connecting piece, and each threaded screw is transmission-connected to each other; the drive motor is transmission-connected to one of the threaded screws to drive the threaded screw to rotate.

[0011] Preferably, an openable and closable switch port is provided on the upper part of the first volume expansion cavity. When the switch port is opened, the first volume expansion cavity is connected to the upper airbag cavity and participates in the operation of the air spring; when the switch port is closed, the first volume expansion cavity is in a closed state, is not connected to the upper airbag cavity, and does not participate in the operation of the air spring.

[0012] Preferably, the first volume expansion chamber is provided with an electromagnetic control switch for controlling the switch state of the switch port; the electromagnetic control switch is connected to a push rod type switch valve, which consists of a valve stem and a switch ball plug. The switch ball plug is at the end of the valve stem, and the switch ball plug can be pressed against the switch port through control.

[0013] Preferably, the electromagnetic control switch includes a sleeve, a coil group and an armature block, the sleeve is sleeved on the outer ring of the coil group, the armature block is located in the middle of the coil group, the upper part of the armature block is connected to the valve stem, and a compression spring is arranged at the bottom of the armature block. The compression spring has an elastic thrust on the armature block, so that the switch ball plug presses against the switch port.

[0014] Preferably, a transmission installation cavity is further provided at the lower end of the second connecting member, and the threaded screw is inserted into the transmission installation cavity. A transmission wheel is installed at the part where the threaded screw inserts into the transmission installation cavity, and the transmission wheels of each threaded screw are synchronously rotated and connected; the transmission wheels are connected by belt transmission.

[0015] Preferably, a lower airbag volume expansion cavity is formed between the outer baffle and the bladder, and the outer baffle is provided with a vent hole so that the lower airbag volume expansion cavity is connected with the second volume expansion cavity.

[0016] Preferably, the first connecting member is provided with a piston shock absorber, including a shock absorber cylinder seat arranged on the upper part of the first connecting member, a piston cylinder arranged in the shock absorber cylinder seat, and a piston rod; the piston rod extends into the upper airbag cavity.

[0017] Compared with the prior art, the air spring piston seat of the present invention has the following beneficial effects:

[0018] 1. The air spring of the present invention generates a magnetic field by energizing the coil group in the sleeve, controlling the armature block to compress the spring downward toward one side of the inside of the sleeve. At this time, the valve stem opens the partition plate, the upper area of ​​the partition plate and the gas passage of the first volume expansion cavity, thereby achieving the first step of increasing the internal volume of the air spring and changing its stiffness characteristics.

[0019] 2. The air spring of the present invention drives the pulley through the driving motor to make the two threaded screws rotate synchronously. At this time, the two adjustment plates move up or down synchronously, and the gas volume in the upper area of ​​the first partition is changed by the additional capacity-increasing compartment, thereby further controlling the effect of changing the stiffness characteristics of the air spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of the air spring with adjustable stiffness described in the present invention.

[0022] Figure 2 is a schematic diagram of the cross-sectional structure of the air spring with adjustable stiffness described in the present invention;

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the lower adjustment cavity of the air spring with adjustable stiffness described in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure inside the first volume adjustment chamber of the air spring with adjustable stiffness described in the present invention.

[0025] Description of reference numerals:

[0026] 11. First connecting piece, 12. Second connecting piece, 13. Mounting cavity, 2. Leather bag, 21. Hoop, 3. Partition plate, 31. Upper airbag cavity, 32. Lower airbag volume expansion cavity, 33. Vent, 4. Inner partition plate, 5. Outer partition plate, 51. Second volume adjustment cavity, 52. Lifting adjustment plate, 53. Side connecting hole, 41. First volume adjustment cavity, 42. Switch port, 6. Threaded screw, 61. Threaded seat sleeve, 62. Drive motor, 7. Sleeve, 71. Coil assembly, 72. Armature block, 73. Valve stem, 74. Switch ball plug, 75. Compression spring, 8. Transmission wheel, 9. Shock absorber cylinder seat, 91. Piston cylinder, 92. Piston rod. DETAILED DESCRIPTION

[0027] 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.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0030] Example

[0031] like Figure 1-4 The stiffness-adjustable air spring shown is composed of a seat body and a bladder 2, wherein the seat body includes a first connecting member 11 and a second connecting member 12, and the first connecting member 11, the second connecting member 12 and the bladder 2 together form an air spring structure with an airbag cavity in the middle.

[0032] See also Figure 2 A partition plate 3 is provided in the middle of the airbag cavity, and the partition plate 3 separates the airbag cavity into an upper airbag cavity 31 and a lower adjustment cavity.

[0033] See also Figure 3 In this embodiment, the lower adjustment cavity includes two cavities, at least one cavity is connected to the upper airbag cavity 31, and the internal volume of the cavity can be adjusted; at least one cavity can be controlled to be connected or isolated from the upper airbag cavity 31.

[0034] See also Figure 2 A hoop 21 is provided on the outer side of the airbag cavity, and the hoop 21 corresponds to the partition plate 3. The hoop 21 presses the leather bag 2 tightly, so that the leather bag 2 and the partition plate 3 are sealed and tightly attached, and the leather bag 2 is tightly hooped around the partition plate 3 to be fixed.

[0035] See also Figure 2 , 3 An inner partition 4 and an outer partition 5 are arranged in the lower adjustment cavity, and the upper and lower ends of the inner partition 4 and the outer partition 5 are respectively connected to the partition plate 3 and the second connecting member 12; the inner partition 4, the outer partition 5, the partition plate 3 and the second connecting member 12 together form a second volume adjustment cavity 51 with adjustable internal volume; the inner partition 4 and the partition plates 3 at the upper and lower ends, and the second connecting member 12 together form a first volume adjustment cavity 41 which can be controlled to be connected or isolated with the upper airbag cavity 31.

[0036] In one embodiment, the second volume expansion chamber is a circular ring structure.

[0037] See also Figure 3 A lower airbag volume expansion cavity 32 is formed between the outer partition plate 5 and the bladder 2, and a vent hole 33 is provided on the outer partition plate 5 to connect the lower airbag volume expansion cavity 32 with the second volume expansion cavity.

[0038] See also Figure 3 The upper part of the second volume expansion cavity is connected with the upper airbag cavity 31, and a lifting adjustment plate 52 is arranged in the second volume expansion cavity. The two sides of the lifting adjustment plate 52 are tightly attached to the inner partition 4 and the outer partition 5, so that the upper part of the lifting adjustment plate 52 forms an adjustable second volume expansion cavity. When the lifting adjustment plate 52 rises, the adjustment cavity is compressed to reduce the volume of the adjustment cavity, that is, the volume of the entire airbag cavity is reduced; the upper side of the outer partition 5 is provided with a side communication hole 53, so that the adjustment cavity is connected with the lower airbag volume expansion cavity 32. That is, the lower airbag volume expansion cavity, the second volume expansion cavity are connected, and the upper airbag cavity 31 is connected.

[0039] See also Figure 3The adjustment mechanism includes at least one threaded screw 6, the upper and lower ends of which are rotatably installed between the partition plate 3 and the second connecting member 12; the threaded screw 6 passes through the middle of the lifting adjustment plate 52 and is screwed to the lifting adjustment plate 52, and the lifting adjustment plate 52 can be lifted up and down by rotating the threaded screw 6; the threaded screw 6 passes through the lower end of the second connecting member 12, and each threaded screw 6 is connected to each other by transmission and rotates synchronously. In this embodiment, there are two threaded screws 6.

[0040] In this embodiment, a threaded seat sleeve 61 is provided in the middle of the lifting adjustment plate 52 , and is connected to the threaded screw 6 through the threaded seat sleeve 61 .

[0041] The driving motor 62 is connected to one of the threaded screws 6 to drive the threaded screw 6 to rotate. The threaded screws 6 are driven synchronously. All the threaded screws 6 drive the lifting and adjusting plate 52 to rise or fall synchronously, and the operation is smooth.

[0042] In this embodiment, there are two threaded screws 6 .

[0043] See also Figure 3 , 4 A first volume expansion cavity is formed in the middle of the inner partition 4, which is formed by the inner partition 4 and the partition plates 3 at the upper and lower ends and the second connecting piece 12; an openable and closable switch port 42 is provided on the upper part of the first volume expansion cavity. When the switch port 42 is opened, the first volume expansion cavity is connected to the upper airbag cavity 31 and participates in the work of the air spring, thereby enlarging the airbag cavity; when the switch port 42 is closed, the first volume expansion cavity is in a closed state, is not connected to the upper airbag cavity 31, does not participate in the work of the air spring, and makes the airbag working cavity smaller, so as to achieve the effect of stiffness adjustment.

[0044] In this embodiment, the first volume expansion chamber is provided with an electromagnetic control switch for controlling the switch state of the switch port 42. The electromagnetic control switch is connected to a push rod type switch valve, which is composed of a valve stem 73 and a switch ball plug 74, and the switch ball plug 74 is at the end of the valve stem 73; the switch ball plug 74 can be controlled to resist the switch port 42.

[0045] See also Figure 4 The electromagnetic control switch includes a sleeve 7, a coil group 71 and an armature block 72. The sleeve 7 is sleeved on the outer ring of the coil group 71. The armature block 72 is located in the middle of the coil group 71. The upper part of the armature block 72 is connected to the valve stem 73. A compression spring 75 is provided at the bottom of the armature block 72. The compression spring 75 has an elastic thrust on the armature block 72, so that the switch ball plug 74 is against the switch port 42.

[0046] See also Figure 3A transmission installation cavity 13 is also provided at the lower end of the second connecting member 12, and the threaded screw 6 penetrates into the transmission installation cavity 13. A transmission wheel 8 is installed at the part where the threaded screw 6 penetrates into the transmission installation cavity 13, and the transmission wheels 8 of each threaded screw 6 are synchronously rotated and connected. In this embodiment, the transmission wheels 8 are connected by belt transmission.

[0047] See also Figure 1 , 2 The first connecting member 11 is provided with a piston shock absorber, including a shock absorber cylinder seat 9 arranged on the upper part of the first connecting member 11, a piston cylinder 91 and a piston rod 92 arranged in the shock absorber cylinder seat 9; the piston rod 92 extends into the upper airbag cavity 31.

[0048] The stiffness-adjustable air spring of the present invention has two cavities, one cavity can adjust the internal volume of the cavity; one cavity can control connection or isolation; the size of the entire airbag cavity can be flexibly adjusted, and the stiffness of the air spring can be controlled and changed.

[0049] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An air spring with adjustable stiffness, comprising a seat body and a bladder, wherein the seat body comprises a first connecting member and a second connecting member, and the first connecting member, the second connecting member and the bladder together form an air spring structure having an airbag cavity in the middle, characterized in that: A partition plate is provided in the middle of the airbag cavity, and the partition plate divides the airbag cavity into an upper airbag cavity and a lower adjustment cavity; a hoop is provided on the outer side of the airbag cavity, and the hoop corresponds to the partition plate, and the hoop presses the leather bag tightly, so that the leather bag and the partition plate are sealed and tightly attached; The lower adjustment cavity contains at least two volume expansion cavities, at least one volume expansion cavity is connected to the upper airbag cavity, and the internal volume of the volume expansion cavity can be adjusted; at least one volume expansion cavity can be controlled to be connected or isolated from the upper airbag cavity.

2. The air spring piston seat according to claim 1, characterized in that: An inner partition and an outer partition are arranged in the lower adjustment cavity, and the upper and lower ends of the inner partition and the outer partition are respectively connected to the partition plate and the second connecting piece; the inner partition, the outer partition, the partition plate and the second connecting piece together form a second volume expansion cavity with adjustable internal volume; the inner partition and the partition plates at the upper and lower ends and the second connecting piece together form a first volume expansion cavity which can be controlled to be connected or isolated with the upper airbag cavity.

3. The air spring piston seat according to claim 2, characterized in that: The upper part of the second volume expansion cavity is connected with the upper airbag cavity, and a lifting adjustment plate is arranged in the second volume expansion cavity. Both sides of the lifting adjustment plate are tightly sealed with the inner partition plate and the outer partition plate, so that an adjustable second volume expansion cavity is formed on the upper part of the lifting adjustment plate. When the lifting adjustment plate rises, the adjustment cavity is compressed; otherwise, the adjustment cavity is enlarged.

4. The air spring piston seat according to claim 3, characterized in that: The second capacity expansion chamber is provided with an adjustment mechanism, including at least one threaded screw and a driving motor. The upper and lower ends of the threaded screw can be rotatably installed between the partition plate and the second connecting piece; the threaded screw passes through the middle part of the lifting adjustment plate and is screwed to the lifting adjustment plate, and the lifting adjustment plate can be lifted up and down by rotating the threaded screw; the threaded screw passes through the lower end of the second connecting piece, and each threaded screw is transmission-connected to each other; the driving motor is transmission-connected to one of the threaded screws to drive the threaded screw to rotate.

5. The air spring piston seat according to claim 2, characterized in that: The upper part of the first volume expansion cavity is provided with an openable and closable switch port. When the switch port is opened, the first volume expansion cavity is connected to the upper air bag cavity and participates in the work of the air spring; when the switch port is closed, the first volume expansion cavity is in a closed state, is not connected to the upper air bag cavity, and does not participate in the work of the air spring.

6. The air spring piston seat according to claim 5, characterized in that: The first volume expansion chamber is provided with an electromagnetic control switch for controlling the switch state of the switch port; the electromagnetic control switch is connected to a push rod type switch valve, which is composed of a valve stem and a switch ball plug. The switch ball plug is at the end of the valve stem, and the switch ball plug can resist the switch port through control.

7. The air spring piston seat according to claim 6, characterized in that: The electromagnetic control switch comprises a sleeve, a coil group and an armature block, wherein the sleeve is sleeved on the outer ring of the coil group, the armature block is located in the middle of the coil group, and the upper part of the armature block is connected to the valve stem.

8. The air spring piston seat according to claim 4, characterized in that: The lower end of the second connecting member is also provided with a transmission installation cavity, and the threaded screw is inserted into the transmission installation cavity. A transmission wheel is installed at the part where the threaded screw penetrates the transmission installation cavity, and the transmission wheels of each threaded screw are synchronously rotated and connected; the transmission wheels are connected by belt transmission.

9. The air spring piston seat according to claim 4, characterized in that: A lower airbag volume expansion cavity is formed between the outer baffle and the bladder, and a vent hole is provided on the outer baffle to connect the lower airbag volume expansion cavity with the second volume expansion cavity.

10. An air spring piston seat according to any one of claims 1 to 9, characterized in that: The first connecting member is provided with a piston shock absorber, which includes a shock absorber cylinder seat arranged on the upper part of the first connecting member, a piston cylinder arranged in the shock absorber cylinder seat, and a piston rod; the piston rod extends into the upper airbag cavity.

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