CN117628101A - An integrated two-stage stiffness oil and gas spring - Google Patents
An integrated two-stage stiffness oil and gas spring Download PDFInfo
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- CN117628101A CN117628101A CN202311528531.3A CN202311528531A CN117628101A CN 117628101 A CN117628101 A CN 117628101A CN 202311528531 A CN202311528531 A CN 202311528531A CN 117628101 A CN117628101 A CN 117628101A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to an integrated two-stage stiffness hydro-pneumatic spring which comprises an upper cavity, an energy storage cylinder body and a support cylinder body, wherein a left oil cavity and a right oil cavity which are communicated through oil holes are arranged in the upper cavity, the upper end of the energy storage cylinder body is fixed in the right oil cavity in a sealing mode, an end cover is fixed at the lower end of the energy storage cylinder body in a sealing mode, a main floating piston is arranged in the energy storage cylinder body, an inner cavity of the energy storage cylinder body between the main floating piston and the end cover is a low-pressure main air chamber, the upper end of the support cylinder body is fixed in the left oil cavity in a sealing mode, a piston rod is arranged in the support cylinder body, a support cylinder piston is arranged at the upper end of the piston rod, a plug is fixed at the lower end of the piston rod in a sealing mode, a sleeve coaxial with the piston rod is fixed between the plug and the support cylinder piston, an auxiliary floating piston is arranged between the sleeve and the piston rod, a gap above the auxiliary floating piston is communicated with a rodless cavity of the support cylinder body, and a gap below the auxiliary floating piston is a high-pressure auxiliary air chamber. The device has the advantages of compact structure, low cost, strong adaptability and high reliability, and can effectively reduce the rigidity and the elastic force of large compression.
Description
Technical Field
The invention relates to a hydro-pneumatic spring, in particular to a hydro-pneumatic spring which integrates two air chambers and realizes two-stage rigidity.
Background
A hydro-pneumatic spring based suspension system has significant advantages over conventional suspension systems, particularly for vehicles with high off-road performance requirements. The existing hydro-pneumatic spring generally adopts a single air chamber structure, and the dynamic stiffness and the elastic force of the hydro-pneumatic spring can be rapidly increased along with the increase of the compression amount, so that the running smoothness of a vehicle can be deteriorated under the working condition of a large fluctuation road surface, the maneuverability exertion and the off-road speed improvement are influenced, the large elastic force is directly transmitted to the vehicle body, the strength and the fatigue life of related structural members can be adversely affected by the instant impact, and the lightweight design of the whole vehicle is not facilitated.
Disclosure of Invention
The invention aims to provide an integrated two-stage stiffness hydro-pneumatic spring which has the advantages of compact structure, low cost, strong adaptability and high reliability, and can effectively reduce the stiffness and the elastic force of large compression.
In order to solve the problems in the prior art, the invention provides an integrated two-stage stiffness hydro-pneumatic spring which comprises an upper cavity, an energy storage cylinder body and a support cylinder body, wherein a left oil cavity and a right oil cavity which are downwards opened and communicated through oil holes are arranged in the upper cavity, an oil filling port communicated with the right oil cavity is arranged on the upper cavity, the upper end of the energy storage cylinder body is coaxially and hermetically fixed in the right oil cavity, an end cover is hermetically fixed at the lower end of the energy storage cylinder body, a main floating piston is arranged in the energy storage cylinder body, an inner cavity of the energy storage cylinder body between the main floating piston and the end cover is a low-pressure main air chamber, a low-pressure air filling port communicated with the low-pressure main air chamber is arranged on the end cover, the upper end of the support cylinder body is coaxially and hermetically fixed in the left oil cavity, the support cylinder body is internally provided with a piston rod, the upper end of the piston rod is provided with a support cylinder piston which is in sliding fit with the support cylinder body, the piston rod below the support cylinder piston is of a hollow structure with an opening facing downwards, a plug is fixedly sealed at the lower end of the piston rod, a sleeve coaxial with the piston rod is fixedly arranged between the plug and the support cylinder piston, the lower end of the sleeve is in sealing fit with the plug, an auxiliary floating piston is arranged between the sleeve and the piston rod, a gap between the sleeve and the piston rod above the auxiliary floating piston is communicated with a rodless cavity of the support cylinder body sequentially through a radial hole at the upper end of the sleeve and an axial hole on the support cylinder piston, a gap between the sleeve and the piston rod below the auxiliary floating piston is a high-pressure auxiliary air chamber, and a high-pressure inflation port communicated with the high-pressure auxiliary air chamber is arranged on the plug.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that a limiting ring table is arranged on the inner wall of the lower end of the supporting cylinder body, and the piston rod is in sliding sealing fit with the limiting ring table.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that a plurality of oil channels which are communicated with a rod cavity and a rodless cavity of a supporting cylinder body are arranged on the supporting cylinder piston, and the plurality of oil channels are uniformly distributed along the circumferential direction of the supporting cylinder piston.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that an upper support lug integrated with the upper cavity is arranged on the upper side of the upper cavity, a lower support lug integrated with the lower support lug is arranged on the lower side of the plug, and the upper support lug and the lower support lug are positioned on the axis of the support cylinder body and are respectively provided with a hinge shaft hole.
Furthermore, the upper end of the energy storage cylinder body is arranged in the right oil cavity through threads, a first sealing groove is formed in the peripheral wall of the right oil cavity, and a sealing ring extruded on the energy storage cylinder body is arranged in the first sealing groove.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that a second sealing groove is formed in the peripheral wall of the main floating piston, a sealing ring extruded on the energy storage cylinder body is arranged in the second sealing groove, and the end cover is welded at the lower end of the energy storage cylinder body in a sealing mode.
Furthermore, the upper end of the support cylinder body is arranged in the left oil cavity through threads, a third sealing groove is formed in the outer wall of the support cylinder body, and a sealing ring extruded on the peripheral wall of the left oil cavity is arranged in the third sealing groove.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that a fourth sealing groove is formed in the peripheral wall of a piston of the supporting cylinder, a sealing ring extruded on the supporting cylinder body is arranged in the fourth sealing groove, a fifth sealing groove is formed in the inner wall of the limiting ring table, and a sealing ring extruded on the piston rod is arranged in the fifth sealing groove.
Furthermore, the integrated two-stage stiffness hydro-pneumatic spring is characterized in that a sixth sealing groove and a seventh sealing groove are correspondingly arranged on the inner wall and the outer wall of the auxiliary floating piston, a sealing ring extruded on a sleeve is arranged in the sixth sealing groove, a sealing ring extruded on a piston rod is arranged in the seventh sealing groove, the plug is arranged at the lower end of the piston rod through threads, an eighth sealing groove is arranged on the peripheral wall of the plug, and a sealing ring extruded on the piston rod is arranged in the eighth sealing groove.
Furthermore, the upper end of the sleeve is clamped in an upper groove arranged on the piston of the supporting cylinder, the inner cavity of the sleeve is coaxially communicated with the axial hole, the lower end of the sleeve is clamped in a lower groove arranged on the plug, and a sealing ring is arranged between the sleeve and the plug.
Compared with the prior art, the integrated two-stage stiffness hydro-pneumatic spring has the following advantages: the invention sets up the upper cavity, energy storage cylinder and support cylinder, set up the opening and down and through left oil pocket and right oil pocket that the oilhole communicates in the upper cavity, set up the oil filling port that communicates with right oil pocket on the upper cavity, seal the upper end of energy storage cylinder in the right oil pocket coaxially, seal the fixed end cover in the lower end of energy storage cylinder, set up the main floating piston in the energy storage cylinder, regard the energy storage cylinder cavity between main floating piston and end cover as the low-pressure main air chamber, and set up the low-pressure inflation port that communicates with low-pressure main air chamber on the end cover, seal the upper end of support cylinder in the left oil pocket coaxially, set up the piston rod in the support cylinder, set up the supporting cylinder piston with support cylinder sliding fit in the upper end of the piston rod, wherein, the piston rod below the supporting cylinder piston is the hollow structure that opens down, seal the fixed plug between piston rod lower end and the plug, and make sleeve lower end and sealing fit, set up the auxiliary floating piston between sleeve and piston rod, let the space between auxiliary floating piston and the upper sleeve and piston rod pass through radial upper hole and supporting cylinder upper end and supporting piston rod of the upper end of the sleeve and the auxiliary air chamber and lower piston rod in order, set up the space is high-pressure air chamber and high pressure. Therefore, the integrated two-stage stiffness hydro-pneumatic spring with compact structure, low cost, strong adaptability and high reliability is formed, in practical application, the hydro-pneumatic spring provided by the invention is correspondingly connected with a frame and a suspension cross arm through an upper cavity and a plug, wherein hydraulic oil is filled in an oil cavity (a left oil cavity and a right oil cavity), low air pressure is filled in a low-pressure main air chamber, high air pressure is filled in a high-pressure auxiliary air chamber, and the hydro-pneumatic spring can stretch and retract and generate two-stage stiffness and corresponding elastic force in the loading process of the hydro-pneumatic spring. The invention provides a specific working process of a hydro-pneumatic spring, which comprises the following steps: (1) before working, low-pressure gas (low pre-charging pressure) is charged into the low-pressure main air chamber through the low-pressure charging port, high-pressure gas (high pre-charging pressure) is charged into the high-pressure auxiliary air chamber through the high-pressure charging port, and hydraulic oil is charged into the oil cavity through the oil charging port, wherein the low pre-charging pressure and the high pre-charging pressure are matched according to the full load of the hydro-pneumatic spring, when the hydro-pneumatic spring is in a full load static balance state, the oil pressure (hydraulic oil pressure) is higher than the low pre-charging pressure so that the low-pressure main air chamber participates in working, and the oil pressure is lower than the high pre-charging pressure so that the high-pressure auxiliary air chamber does not participate in working. (2) When the air charging and oil charging are completed but not loaded yet, the load and the oil pressure are 0, the main floating piston is propped to the uppermost side by the low-pressure main air chamber under the action of low pre-charging pressure, the auxiliary floating piston is propped to the uppermost side by the high-pressure auxiliary air chamber under the action of high pre-charging pressure, and the piston rod extends out to the maximum position; after loading, the piston rod is recovered until the load and the oil pressure are balanced, and the compression amount of the hydro-pneumatic spring is larger when the load is larger so as to obtain larger oil pressure. (3) When the load is smaller, the hydro-pneumatic spring is in a small compression stroke, the low-pressure main air chamber participates in working, and when the hydraulic pressure is higher than the air pressure of the low-pressure main air chamber, the main floating piston moves downwards and compresses the air in the low-pressure main air chamber, and the hydro-pneumatic spring forms primary rigidity and corresponding elastic force due to the compression of the air in the low-pressure main air chamber; at this time, the oil pressure does not reach the opening pressure of the high-pressure auxiliary air chamber due to the small compression amount of the hydro-pneumatic spring, and the auxiliary floating piston is still at the uppermost position. (4) When the load is increased, the hydro-pneumatic spring is further compressed and the oil pressure is increased, the hydro-pneumatic spring is in a large compression stroke, the main floating piston further moves downwards, the high-pressure auxiliary air chamber participates in working when the oil pressure is higher than high pre-charging pressure, the auxiliary floating piston also moves downwards and compresses the air in the high-pressure auxiliary air chamber, at the moment, the low-pressure main air chamber and the high-pressure auxiliary air chamber work simultaneously, the air volume is increased after the high-pressure auxiliary air chamber participates in working, and the hydro-pneumatic spring forms secondary rigidity and corresponding elastic force due to the compression of the air in the low-pressure main air chamber and the high-pressure auxiliary air chamber; for the same large compression amount of the hydro-pneumatic spring, the two air chambers (the low-pressure main air chamber and the high-pressure auxiliary air chamber) jointly participate in working, so that compared with the working of a single air chamber, the stiffness and the corresponding elastic force of the hydro-pneumatic spring can be effectively reduced.
The integrated two-stage stiffness hydro-pneumatic spring of the invention is described in detail below with reference to the specific embodiments shown in the drawings.
Drawings
FIG. 1 is a schematic diagram of an integrated two-stage rate hydro-pneumatic spring of the present invention;
fig. 2 is a partial enlarged view of the position a in fig. 1.
Detailed Description
First, it should be noted that the terms of up, down, left, right, front, back, etc. in the present invention are merely described according to the drawings, so as to facilitate understanding, and are not limited to the technical solution of the present invention and the scope of protection claimed.
An embodiment of an integrated two-stage stiffness hydro-pneumatic spring according to the invention as shown in fig. 1 and 2 comprises an upper cavity 1, an energy storage cylinder 2 and a support cylinder 3. A left oil chamber 12 and a right oil chamber 13 which are opened downward and communicate with each other through an oil hole 11 are provided in the upper chamber 1, and an oil filling port 14 which communicates with the right oil chamber 13 is provided on the upper chamber 1. The upper end of the energy storage cylinder body 2 is coaxially sealed and fixed in the right oil cavity 13, the end cover 21 is sealed and fixed at the lower end of the energy storage cylinder body 2, the main floating piston 22 is arranged in the energy storage cylinder body 2, the inner cavity of the energy storage cylinder body 2 between the main floating piston 22 and the end cover 21 is used as a low-pressure main air chamber 23, and a low-pressure charging port 24 communicated with the low-pressure main air chamber 23 is arranged on the end cover 21. The upper end of the support cylinder body 3 is coaxially sealed and fixed in the left oil cavity 12, a piston rod 4 is arranged in the support cylinder body 3, a support cylinder piston 41 which is in sliding fit with the support cylinder body 3 is arranged at the upper end of the piston rod 4, the piston rod 4 below the support cylinder piston 41 adopts a hollow structure with an opening facing downwards, a plug 5 is sealed and fixed at the lower end of the piston rod 4, a sleeve 6 which is coaxial with the piston rod 4 is fixed between the plug 5 and the support cylinder piston 41, the lower end of the sleeve 6 is in sealing fit with the plug 5, a secondary floating piston 7 is arranged between the sleeve 6 and the piston rod 4, a gap between the sleeve 6 above the secondary floating piston 7 and the piston rod 4 is communicated with a rodless cavity of the support cylinder body 3 sequentially through a radial hole 61 at the upper end of the sleeve 6 and an axial hole 42 on the support cylinder piston 41, the gap between the sleeve 6 below the secondary floating piston 7 and the piston rod 4 is used as a high-pressure secondary air chamber 8, and a high-pressure air charging port 9 which is communicated with the high-pressure secondary air chamber 8 is arranged on the plug 5.
Through the arrangement, the integrated two-stage stiffness hydro-pneumatic spring with compact structure, low cost, strong adaptability and high reliability is formed, in practical application, the hydro-pneumatic spring provided by the invention is correspondingly connected with a frame and a suspension cross arm through the upper cavity 1 and the plug 5, wherein hydraulic oil is filled in an oil cavity (the left oil cavity 12 and the right oil cavity 13), low-pressure air pressure is filled in a low-pressure main air chamber 23, high-pressure air pressure is filled in a high-pressure auxiliary air chamber 8, and in the loading process of the hydro-pneumatic spring, the hydro-pneumatic spring can stretch and retract to generate two-stage stiffness and corresponding elastic force, compared with the existing single-air chamber hydro-pneumatic spring, the stiffness and elastic force during large compression can be effectively reduced, the technical purposes of improving the running smoothness of a vehicle, improving the maneuvering speed of the vehicle and reducing the instantaneous impact on the vehicle body are achieved, and the hydro-pneumatic spring has the characteristics of compact structure, high integration and small occupied space, and is beneficial to realizing the lightweight design of the whole vehicle. The invention provides a specific working process of a hydro-pneumatic spring, which comprises the following steps: (1) before working, low-pressure gas (low pre-charging pressure) is charged into the low-pressure main air chamber 23 through the low-pressure charging port 24, high-pressure gas (high pre-charging pressure) is charged into the high-pressure auxiliary air chamber 8 through the high-pressure charging port 9, and hydraulic oil is charged into the oil cavity through the charging port 14, wherein the low pre-charging pressure and the high pre-charging pressure are set according to the full load matching of the hydro-pneumatic spring, and when the hydro-pneumatic spring is in a full load static balance state, the hydraulic pressure (hydraulic oil pressure) is higher than the low pre-charging pressure so that the low-pressure main air chamber 23 participates in working, and the hydraulic pressure is lower than the high pre-charging pressure so that the high-pressure auxiliary air chamber 8 does not participate in working. (2) When the air charging and the oil charging are completed but not loaded yet, the load and the oil pressure are 0, the low-pressure main air chamber 23 pushes the main floating piston 22 to the uppermost under the action of low pre-charging pressure, the high-pressure auxiliary air chamber 8 pushes the auxiliary floating piston 7 to the uppermost under the action of high pre-charging pressure, and the piston rod extends to the maximum position; after loading, the piston rod is recovered until the load and the oil pressure are balanced, and the compression amount of the hydro-pneumatic spring is larger when the load is larger so as to obtain larger oil pressure. (3) When the load is smaller, the hydro-pneumatic spring is in a small compression stroke, the low-pressure main air chamber 23 participates in working, when the hydraulic pressure is higher than the air pressure of the low-pressure main air chamber, the main floating piston 22 moves downwards and compresses the air in the low-pressure main air chamber 23, and the hydro-pneumatic spring forms primary rigidity and corresponding elastic force due to the compression of the air in the low-pressure main air chamber 23; at this time, the oil pressure has not reached the opening pressure of the high-pressure auxiliary air chamber 8 due to the small compression amount of the hydro-pneumatic spring, and the auxiliary floating piston 7 is still at the uppermost position. (4) When the load is increased, the hydro-pneumatic spring is further compressed and the oil pressure is increased, the hydro-pneumatic spring is in a large compression stroke, the main floating piston 22 further moves downwards, the high-pressure auxiliary air chamber 8 participates in working when the oil pressure is higher than high pre-charging pressure, the auxiliary floating piston 7 also moves downwards and compresses the air in the high-pressure auxiliary air chamber 8, at the moment, the low-pressure main air chamber 23 and the high-pressure auxiliary air chamber 8 work simultaneously, the air volume is increased after the high-pressure auxiliary air chamber 8 participates in working, and the hydro-pneumatic spring forms secondary rigidity and corresponding elastic force due to the compression of the air in the low-pressure main air chamber 23 and the high-pressure auxiliary air chamber 8; for the same large compression amount of the hydro-pneumatic spring, the two air chambers (the low-pressure main air chamber and the high-pressure auxiliary air chamber) jointly participate in working, so that compared with the working of a single air chamber, the stiffness and the corresponding elastic force of the hydro-pneumatic spring can be effectively reduced. In practical application, in order to ensure the stability of the motion of the piston rod 4, the invention sets a stop ring table 31 on the inner wall of the lower end of the support cylinder 3, and makes the piston rod 4 and the stop ring table 31 slide and seal. For the convenience of installation and connection, the invention is provided with an upper support lug 15 integrated with the upper cavity 1, a lower support lug 51 integrated with the plug 5 is arranged on the lower side of the plug 5, and the upper support lug 15 and the lower support lug 51 are positioned on the axis of the supporting cylinder body 3 and are respectively provided with a hinge shaft hole.
As a specific embodiment, the present invention provides a plurality of oil passages 43 that communicate the rod chamber and the rodless chamber of the support cylinder 3 on the support cylinder piston 41, and makes the plurality of oil passages 43 distributed along the circumferential direction of the support cylinder piston 41. This structural arrangement increases the oil filling amount on the one hand and the lubrication effect and the operational stability of the piston rod 4 on the other hand. For easy disassembly and assembly, the upper end of the energy storage cylinder body 2 is installed in the right oil cavity 13 through threads, a first sealing groove 131 is formed in the peripheral wall of the right oil cavity 13, and a sealing ring extruded on the energy storage cylinder body 2 is arranged in the first sealing groove 131 so as to ensure tightness between the energy storage cylinder body 2 and the upper cavity 1. Similarly, in the present embodiment, a second seal groove 221 is provided on the peripheral wall of the main floating piston 22, and a seal ring extruded on the energy storage cylinder 2 is provided in the second seal groove 221 to ensure tightness between the main floating piston 22 and the energy storage cylinder 2; and the end cap 21 is hermetically welded to the lower end of the accumulator cylinder 2 to improve the integrity.
As a specific embodiment, the upper end of the supporting cylinder body 3 is arranged in the left oil cavity 12 through threads so as to be convenient to assemble and disassemble, a third sealing groove 32 is arranged on the outer wall of the supporting cylinder body 3, and a sealing ring extruded on the peripheral wall of the left oil cavity 12 is arranged in the third sealing groove 32 so as to ensure the tightness between the supporting cylinder body 3 and the upper cavity 1. As a specific embodiment, a fourth sealing groove 44 is arranged on the peripheral wall of the supporting cylinder piston 41, and a sealing ring extruded on the supporting cylinder body 3 is arranged in the fourth sealing groove 44 so as to ensure the tightness and stable operation between the supporting cylinder piston 41 and the supporting cylinder body 3; and a fifth sealing groove 33 is arranged on the inner wall of the limiting ring table 31, and a sealing ring extruded on the piston rod 4 is arranged in the fifth sealing groove 33 so as to ensure the tightness between the piston rod 4 and the limiting ring table 31.
Similarly, in this embodiment, a sixth seal groove 71 and a seventh seal groove 72 are correspondingly disposed on the inner and outer walls of the auxiliary floating piston 7, a seal ring pressed against the sleeve 6 is disposed in the sixth seal groove 71 to ensure tightness between the auxiliary floating piston 7 and the sleeve 6, and a seal ring pressed against the piston rod 4 is disposed in the seventh seal groove 72 to ensure tightness between the auxiliary floating piston 7 and the piston rod 4. Meanwhile, in the specific embodiment, the plug 5 is arranged at the lower end of the piston rod 4 through threads, so that the convenience of disassembly and assembly is improved, the eighth sealing groove 52 is formed in the peripheral wall of the plug 5, and the sealing ring extruded on the piston rod 4 is arranged in the eighth sealing groove 52, so that the tightness between the plug 5 and the piston rod 4 is ensured. In the present invention, the following mounting and fixing method is adopted for the sleeve 6: the upper end of the sleeve 6 is clamped in an upper groove arranged on the piston 41 of the supporting cylinder, the inner cavity of the sleeve 6 is coaxially communicated with the axial hole 42, the lower end of the sleeve 6 is clamped in a lower groove arranged on the plug 5, and a sealing ring is arranged between the sleeve 6 and the plug 5 to ensure the tightness between the sleeve 6 and the plug 5. It should be noted that, each sealing ring herein refers to an O-ring or a sealing ring, and should be selected according to specific actions.
The above examples are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the invention as claimed, and various modifications made by those skilled in the art according to the technical solution of the present invention should fall within the scope of the invention as defined in the claims without departing from the design concept of the present invention.
Claims (10)
1. The utility model provides an integrated two-stage stiffness hydro-pneumatic spring which is characterized in that, including last cavity (1), energy storage cylinder body (2) and support cylinder body (3), be equipped with left oil pocket (12) and right oil pocket (13) that the opening just communicates through oilhole (11) down in last cavity (1), be equipped with on last cavity (1) with right oil pocket (13) intercommunication fill oil mouth (14), energy storage cylinder body (2) upper end coaxial seal is fixed in right oil pocket (13), energy storage cylinder body (2) lower extreme seal has end cover (21), is equipped with main floating piston (22) in energy storage cylinder body (2), energy storage cylinder body (2) inner chamber between main floating piston (22) and end cover (21) is low pressure main air chamber (23), be equipped with on end cover (21) with low pressure charging hole (24) that communicate with low pressure main air chamber (23), support cylinder body (3) upper end coaxial seal is fixed in left oil pocket (12), be equipped with piston rod (4) in support cylinder body (3), piston rod (4) upper end be equipped with support cylinder (4) sliding fit's support cylinder (4) piston rod (41) and open end down in order to seal piston rod (41) piston rod (4) to have piston rod (4) to seal end down to seal piston rod (41), a sleeve (6) coaxial with the piston rod (4) is fixed between the plug (5) and the supporting cylinder piston (41), the lower end of the sleeve (6) is in sealing fit with the plug (5), an auxiliary floating piston (7) is arranged between the sleeve (6) and the piston rod (4), a gap between the sleeve (6) above the auxiliary floating piston (7) and the piston rod (4) sequentially passes through a radial hole (61) at the upper end of the sleeve (6) and an axial hole (42) on the supporting cylinder piston (41) to be communicated with a rodless cavity of the supporting cylinder body (3), a gap between the sleeve (6) below the auxiliary floating piston (7) and the piston rod (4) is a high-pressure auxiliary air chamber (8), and a high-pressure inflation inlet (9) communicated with the high-pressure auxiliary air chamber (8) is formed in the plug (5).
2. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 1, wherein a limiting ring table (31) is arranged on the inner wall of the lower end of the supporting cylinder body (3), and the piston rod (4) is in sliding sealing fit with the limiting ring table (31).
3. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 2, wherein the supporting cylinder piston (41) is provided with a plurality of oil channels (43) which are communicated with the rod cavity and the rodless cavity of the supporting cylinder body (3), and the plurality of oil channels (43) are uniformly distributed along the circumferential direction of the supporting cylinder piston (41).
4. An integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 3, characterized in that the upper side of the upper cavity (1) is provided with an upper support lug (15) integrated with the upper cavity, the lower side of the plug (5) is provided with a lower support lug (51) integrated with the plug, and the upper support lug (15) and the lower support lug (51) are positioned on the axis of the support cylinder (3) and are respectively provided with a hinge shaft hole.
5. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein the upper end of the energy storage cylinder body (2) is installed in the right oil cavity (13) through threads, a first sealing groove (131) is formed in the peripheral wall of the right oil cavity (13), and a sealing ring extruded on the energy storage cylinder body (2) is arranged in the first sealing groove (131).
6. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein a second sealing groove (221) is arranged on the peripheral wall of the main floating piston (22), a sealing ring extruded on the energy storage cylinder body (2) is arranged in the second sealing groove (221), and the end cover (21) is welded at the lower end of the energy storage cylinder body (2) in a sealing way.
7. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein the upper end of the support cylinder body (3) is installed in the left oil cavity (12) through threads, a third sealing groove (32) is formed in the outer wall of the support cylinder body (3), and a sealing ring extruded on the peripheral wall of the left oil cavity (12) is arranged in the third sealing groove (32).
8. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein a fourth sealing groove (44) is formed in the peripheral wall of the supporting cylinder piston (41), a sealing ring extruded on the supporting cylinder body (3) is arranged in the fourth sealing groove (44), a fifth sealing groove (33) is formed in the inner wall of the limiting ring table (31), and a sealing ring extruded on the piston rod (4) is arranged in the fifth sealing groove (33).
9. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein a sixth sealing groove (71) and a seventh sealing groove (72) are correspondingly arranged on the inner wall and the outer wall of the auxiliary floating piston (7), a sealing ring extruded on the sleeve (6) is arranged in the sixth sealing groove (71), a sealing ring extruded on the piston rod (4) is arranged in the seventh sealing groove (72), the plug (5) is arranged at the lower end of the piston rod (4) through threads, an eighth sealing groove (52) is arranged on the peripheral wall of the plug (5), and a sealing ring extruded on the piston rod (4) is arranged in the eighth sealing groove (52).
10. The integrated two-stage stiffness hydro-pneumatic spring as claimed in claim 4, wherein the upper end of the sleeve (6) is clamped in an upper groove arranged on the piston (41) of the supporting cylinder, the inner cavity of the sleeve (6) is coaxially communicated with the axial hole (42), the lower end of the sleeve (6) is clamped in a lower groove arranged on the plug (5), and a sealing ring is arranged between the sleeve (6) and the plug (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528531.3A CN117628101A (en) | 2023-11-16 | 2023-11-16 | An integrated two-stage stiffness oil and gas spring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528531.3A CN117628101A (en) | 2023-11-16 | 2023-11-16 | An integrated two-stage stiffness oil and gas spring |
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| Publication Number | Publication Date |
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| CN117628101A true CN117628101A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311528531.3A Pending CN117628101A (en) | 2023-11-16 | 2023-11-16 | An integrated two-stage stiffness oil and gas spring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119554357A (en) * | 2024-10-28 | 2025-03-04 | 北京航天发射技术研究所 | Buffer device and hydraulic buffer lifting device capable of adapting to impact load |
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2023
- 2023-11-16 CN CN202311528531.3A patent/CN117628101A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119554357A (en) * | 2024-10-28 | 2025-03-04 | 北京航天发射技术研究所 | Buffer device and hydraulic buffer lifting device capable of adapting to impact load |
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