CN111520431A - Integral candle type hydro-pneumatic suspension - Google Patents
Integral candle type hydro-pneumatic suspension Download PDFInfo
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- CN111520431A CN111520431A CN202010116841.4A CN202010116841A CN111520431A CN 111520431 A CN111520431 A CN 111520431A CN 202010116841 A CN202010116841 A CN 202010116841A CN 111520431 A CN111520431 A CN 111520431A
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- 239000000725 suspension Substances 0.000 title claims abstract description 75
- 238000013016 damping Methods 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims description 20
- 238000005461 lubrication Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 210000004907 gland Anatomy 0.000 abstract description 13
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- F16F9/061—Mono-tubular units
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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
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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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
- F16F9/3221—Constructional features of piston rods
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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
- F16F9/3235—Constructional features of cylinders
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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
- F16F9/3278—Details for lubrication
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
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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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an integrated candle type hydro-pneumatic suspension, wherein the upper end of a cylinder barrel is fixedly connected with an upper end cover, a piston rod is of a hollow structure, and an inner hole of the piston rod is processed; a guide sleeve and a guide gland are sequentially arranged at the lower end of the cylinder barrel, the guide sleeve and the guide gland are both of hollow annular structures, a piston rod is installed in a matching way with inner holes of the guide sleeve and the guide gland, the guide gland is tightly contacted with the outer side end face of the guide sleeve, and the guide gland is fixedly connected with the lower end face of the cylinder barrel through guide sleeve bolts which are circumferentially arranged; the piston rod is connected with the main piston; a radial damping valve is processed on the excircle of the piston rod; the oil-gas suspension rodless cavity is communicated with the inner hole of the piston rod, and the check valve and the normally open hole of the damping valve are used for communicating the oil-gas suspension rod cavity with the inner hole of the piston rod; the excircle of the lower part of the piston rod is processed into a conical surface structure. The invention does not need any additional guide mechanism, simplifies the structure of the suspension system and has wide application prospect in the field of mines.
Description
Technical Field
The invention relates to an integrated candle type hydro-pneumatic suspension, and belongs to the technical field of hydraulic machinery.
Background
The hydro-pneumatic suspension mainly comprises a hydro-pneumatic spring, integrates an elastic element and a damping element, has a certain guiding function on a cylinder body, requires a smaller vehicle body arrangement space, and can meet the requirement of smoothness of an engineering vehicle to the maximum extent by virtue of excellent nonlinear elastic characteristic and good vibration damping performance of the hydro-pneumatic suspension. From the view of the integral structure, the existing oil-gas suspension system applied to the engineering vehicle mainly has two types of independent type and interconnection type; from the form of the oil-gas spring, the oil-gas spring is divided into a single-air-chamber oil-gas separation type, a double-air-chamber oil-gas separation type, a multi-stage pressure type, an oil-gas mixing type and the like. Compared with other suspension systems, the hydro-pneumatic suspension has the characteristics of typical nonlinear variable rigidity and increasement, when a vehicle runs on a flat road surface, the suspension moving stroke is small, the rigidity generated by the elastic medium bearing instantaneous pressure is small, and the requirement on smoothness can be met; when the vehicle runs on the undulating ground, the elastic force changes in a nonlinear way and the rigidity is increased, so that more impact energy can be absorbed, the characteristic of high energy storage ratio per unit mass of gas is exerted, the buffer effect is effectively realized, the phenomena of direct transmission of ground excitation to the vehicle body and 'suspension breakdown' are avoided, the off-road speed of the vehicle is increased, and the maneuverability is improved.
The vehicle suspension system is mainly classified into a non-independent suspension type and an independent suspension type according to the structure, and for the non-independent suspension type, the large non-suspension mass can cause the contact stress of tires to change violently, which can have adverse effects on the stability of the steering force of the vehicle, especially for the vehicle which is provided with an integral drive axle and has less load. In extreme cases, because the non-suspension mass is large, the phenomenon that vibration occurs under the uneven road surface and even the vibration is changed from understeer to oversteer is caused, the independent suspension is adopted, the mass of the independent suspension is small, the tire is stably attached to the ground, and the maneuverability of the vehicle is more stable. In the independent suspension structure, structures such as a double-cross arm type, a multi-link type and a single-trailing arm type are common, but the single axle of the mining vehicle has large bearing mass and is relatively complex, so the independent suspension structure is not popularized, and the integral axle of the non-independent suspension structure is mainly used at present.
Disclosure of Invention
In view of the above, the invention provides the integrated candle type hydro-pneumatic suspension, the lower end of the piston rod is directly inserted into the knuckle arm without adding any guide mechanism, the cylinder barrel and the piston rod can serve as a main pin, the steering function can be realized through the relative rotation between the piston rod and the cylinder barrel when a vehicle turns, the guide sleeve is integrated on the cylinder barrel, the structure of the whole suspension system is simplified, and the integrated candle type hydro-pneumatic suspension has a wide application prospect in the field of mines.
The integrated candle type oil-gas suspension comprises a cylinder barrel, a piston rod, a guide gland, a main piston, a guide sleeve, an upper end cover and a guide sleeve bolt; the upper end of the cylinder barrel is fixedly connected with the upper end cover through bolts, welding or threaded connection, the piston rod is of a hollow structure, and an inner hole of the piston rod is machined; the lower end of the cylinder barrel is sequentially provided with a guide sleeve and a guide gland, the guide sleeve and the guide gland are both of hollow annular structures, a piston rod is installed in a matching way with inner holes of the guide sleeve and the guide gland, the guide gland is tightly contacted with the outer side end face of the guide sleeve, and the guide gland and the lower end face of the cylinder barrel are fixedly connected together through guide sleeve bolts which are circumferentially arranged; the piston rod is connected with the main piston; a radial damping valve is processed on the excircle of the piston rod and consists of a one-way valve and a normally open hole; the oil-gas suspension rodless cavity is communicated with the inner hole of the piston rod, and the check valve and the normally open hole of the damping valve are used for communicating the oil-gas suspension rod cavity with the inner hole of the piston rod; the excircle of the lower part of the piston rod is processed into a conical surface structure.
Furthermore, a guide boss is processed at the end face of the outer side of the guide sleeve and is matched with a step in an inner hole of the cylinder barrel to realize axial limiting of the guide sleeve.
Furthermore, the inner hole of the cylinder barrel is a unthreaded hole, and the outer circle of the guide sleeve is a cylindrical surface and can be directly assembled in the inner hole of the cylinder barrel.
And furthermore, an annular guide boss is processed at one end, close to the oil gas suspension rod cavity, of the guide sleeve, the inner diameter of the annular guide boss is larger than the diameter of the piston rod, a guide annular cavity is formed between the annular guide boss and the inner hole of the piston rod, an annular piston boss is processed on the end face, facing the oil gas spring rod cavity, of the main piston corresponding to the annular guide boss, and when the piston rod is pulled to the longest position, the annular piston boss enters the guide annular cavity.
Furthermore, a first guide belt, a first oil seal and a second oil seal are sequentially arranged in the inner hole of the guide sleeve from one side of the oil gas suspension rod cavity, the first guide belt is arranged in front of the first oil seal and the second oil seal which are connected in series, and the rod cavity is suspended close to the oil gas; a first static seal and a second static seal are sequentially arranged at the outer circle of the guide sleeve from the side of the oil gas suspension rod cavity, and a protection ring is arranged at the low-pressure side of a first static seal groove; the excircle of uide bushing and the hole cooperation of cylinder make first static seal and second static seal extrusion deformation.
Furthermore, a lubricating groove, a second guide belt and a dustproof ring are sequentially arranged in an inner hole of the guide gland from one side of the guide sleeve, a guide oil filling hole, a guide air release hole, a third static seal and an outer guide belt are arranged at the outer circle of the guide gland from one side of the guide sleeve, wherein the guide oil filling hole and the guide air release hole are both positioned at the inner side of the third static seal and are both communicated with the lubricating groove, and the lubricating groove is positioned between the second oil seal and the second guide belt; the radial corresponding position of cylinder has arranged lubrication hole and relief valve respectively, and wherein lubrication hole and direction oil filler point intercommunication, relief valve and direction gas release intercommunication, the lubrication hole be used for with the vehicle concentrate the lubricated pipe connection.
Furthermore, the excircle of the piston rod is matched with a piston inner hole of the main piston, an annular end face is processed at the upper end of the piston inner hole, the inner diameter of the annular end face is not smaller than the diameter of the piston rod inner hole, and the top end of the piston rod is contacted with the side face of the annular end face after being assembled into the piston inner hole; a circumferential piston through hole is processed on the annular end face of the main piston, a circumferential threaded hole is processed at the top end of the corresponding piston rod which is in contact with the annular end face, and the piston through hole is aligned with the circumferential threaded hole and then fixedly connected through a piston bolt during assembly; the excircle of the main piston is provided with a guide belt.
Furthermore, the constant through hole is formed by serially connecting a small throttling hole and a large throttling hole, wherein the small throttling hole is close to the inner hole of the piston rod, and oil in the rodless cavity sequentially enters the rod cavity through the small throttling hole and the large throttling hole; the check valve is characterized in that a steel ball is added into a normally-open hole, the diameter of the steel ball is between the diameter of a small throttling hole and the diameter of a large throttling hole, the position of the steel ball is limited through the hole wall of a piston inner hole of a main piston, the steel ball is prevented from falling out of the normally-open hole, and the area of the piston inner hole covering the large throttling hole is not more than half of the cross section area of the large throttling hole.
Furthermore, the conical degree of the lower part of the piston rod is-; the lower end face of the piston rod is provided with a circumferential end face threaded hole, and the piston rod and the knuckle arm are fastened and assembled together through bolts.
Further, an oil drain hole is machined in the center of the lower end face of the piston rod and communicated with an inner hole of the piston rod, and the oil drain hole is sealed through a plug.
Further, an air release port is processed at the upper end cover of the oil-gas suspension, the oil release port is communicated with a rodless cavity oil chamber and sealed by a plug, and an inflation valve is installed on the upper end cover and is communicated with the rodless cavity of the oil-gas suspension; an inflation valve cap is arranged at the top end of the inflation valve and connected with the upper end cover through threads.
Furthermore, a connecting plate is welded on the outer side of the cylinder barrel, a certain number of reinforcing ribs are welded between the connecting plate and the cylinder barrel, and a certain number of plate through holes are processed on the connecting plate; a key groove is processed on the back of the connecting plate; the included angle between the central axis of the piston rod and the bottom plane of the connecting plate is set to be 0-3 degrees.
Further, the piston rod and the main piston are processed by a threaded connection or an integrated forging forming method.
Has the advantages that:
1. the invention provides an integrated candle type hydro-pneumatic suspension structure, wherein a cylinder barrel is directly fixed on a vehicle body through a connecting plate, the lower end of a piston rod is processed into a conical surface structure to be connected with a steering knuckle arm, the whole hydro-pneumatic suspension is equivalent to the action of a main pin, and bears all directions of stress in the vehicle running process.
2. Compared with the prior art, the integrated candle type oil-gas suspension structure is characterized in that the second guide belt and the lubricating groove are directly arranged on the lower half part of the cylinder barrel to form an integrated structure, and the number of structural parts and the processing and assembling difficulty are effectively reduced. The hole of cylinder is processed into the shoulder hole, and the uide bushing is located the cylinder middle part in addition, and the piston mainly moves first one at the cylinder, realizes the anti-seepage of fluid through the sealed on the uide bushing, and the cylinder lower half mainly is the lubrication and the support area of piston rod and need not to undertake the sealed effect of oil gas medium, even the piston rod lower extreme appear colliding with, fish tail scheduling problem, can not influence the sealing performance that oil gas hung yet, compare greatly improved the anti-seepage ability of product with traditional structure.
3. According to the integrated candle type oil-gas suspension structure, the taper of the conical surface at the lower part of the piston rod is usually designed to be 1:8-1:10, and structural topology optimization proves that the integrated candle type oil-gas suspension structure can minimize local stress concentration of the piston rod, improve the stress environment and realize the maximum tight fit with a knuckle arm. In addition, an included angle between the central axis of the piston rod or the cylinder and the bottom plane of the connecting plate is usually set to be 0-3 degrees, and the lateral force borne by the suspension system in a static balance position can be reduced to the minimum through dynamic modeling analysis.
4. The invention provides an integrated candle type oil-gas suspension structure.A radial damping valve is processed on a piston rod and consists of a one-way valve and a normally open hole; the check valve and the normally open hole of the damping valve are used for communicating the oil gas suspension rod cavity and the rodless cavity; the check valve can be realized by adding the steel ball into the stepped hole, particularly, the limit function of the steel ball can be realized by structural innovation when the main piston is assembled, and the check valve has the characteristics of simple structure, low cost and suitability for mass production. In addition, experiments prove that the area of the inner hole of the piston, which covers the throttling large hole, is not more than half of the cross section area of the throttling large hole, so that the obvious throttling phenomenon of the oil liquid caused by the limit of the main piston can be effectively avoided.
Drawings
FIG. 1 is a main sectional view of an hydro-pneumatic suspension;
FIG. 2 is a rear view of the hydro-pneumatic suspension;
FIG. 3 is a top view of the hydro-pneumatic suspension;
FIG. 4 is a right side view of the hydro-pneumatic suspension;
FIG. 5 is a left side view of the hydro-pneumatic suspension;
FIG. 6 is a front cross-sectional view of the guide sleeve;
FIG. 7 is a front cross-sectional view of the master piston;
FIG. 8 is a left side view of the master piston;
in the figure: 1. the cylinder, 2, a piston rod, 3, an oil filling channel, 4, a check valve, 5, a main piston, 6, a conical surface, 7, a lubricating hole, 8, a guide sleeve, 9, a piston bolt, 10, a piston rod inner hole, 11, an oil drain hole, 12, a top cover bolt, 13, an inflation valve, 14, an upper end cover, 15, a first throttling hole, 16, a second throttling hole, 17, an exhaust channel, 18, an exhaust plug, 19, a pressure relief valve, 20, a cylinder large hole, 21, an end face threaded hole, 30, a lubricating groove, 31, a third oil seal, 32, a first guide belt, 33, a first static seal, 34, a protective ring, 35, a dust ring, 36, a first oil seal, 37, a second oil seal, 38, a second guide belt, 39, a guide threaded hole, 40, a cylinder boss, 41, a second static seal, 42, a piston guide belt, 47, a connecting plate, 48, a reinforcing rib, 49, a key groove, 50, a plate through hole, 51, a piston inner hole, 52. annular end face, 53 piston through hole, 55 piston guide belt.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention designs an integrated candle type oil-gas suspension structure, as shown in figures 1-5, and the integrated candle type oil-gas suspension structure has wide application prospect in steering axles in the fields of mining machinery and multi-shaft heavy-duty carrier vehicles. The upper end of the cylinder barrel 1 is fixedly connected with the upper end cover 14 through bolts or threads, the piston rod 2 is of a hollow structure and is processed with a piston rod inner hole 10, the piston rod 2 is fixedly connected with the main piston 5 of an annular structure through piston bolts 9 arranged on the circumferential direction of the end face, and the piston rod can be processed through a thread connection or integrated forging forming method; the excircle of the piston rod 2 is matched with a piston inner hole 51 for installation, an annular end face 52 is processed at the upper end of the piston inner hole 51, the inner diameter of the annular end face 52 is not smaller than the diameter of the piston rod inner hole 10, and after the piston rod 2 is assembled into the piston inner hole 51, the top end of the piston rod is fully contacted with the side face of the annular end face 52, so that the axial limit of the main piston 5 is realized; meanwhile, a circumferential piston through hole 53 is processed on the annular end face 52 of the main piston 5, a circumferential threaded hole is processed at the top end of the corresponding piston rod 2 in contact with the annular end face 52, and the piston rod is fixedly connected through a piston bolt 9 after alignment during assembly. The outer circle of the main piston 5 is arranged with a piston guide belt 42.
The inner hole of the cylinder barrel 1 is processed into a stepped hole, a cylinder barrel boss 40 is formed in the middle of the cylinder barrel 1, the diameter of the inner hole in the upper portion of the cylinder barrel 1 is large and is defined as a large cylinder barrel hole 20, and the diameter of the inner hole in the lower portion of the cylinder barrel 1 is small and is defined as a small cylinder barrel hole. The upper end of the hydro-pneumatic suspension cylinder barrel 1 is sequentially provided with the guide sleeve 8, the piston rod assembly formed by combining the piston rod 2 and the main piston 5, the guide sleeve 8 is limited by the cylinder barrel boss 40 after being arranged, the guide sleeve 8 is prevented from moving towards the inside of the cylinder barrel 1, and the cylinder barrel boss 40 is positioned in the middle of the cylinder barrel 1. The main piston 5 makes a straight reciprocating motion in the cylinder barrel large hole 20 between the guide sleeve 8 and the upper end cover 14, and plays a role in guiding and supporting through a piston guide belt 42 at the outer circle of the main piston 5. The guide sleeve 8 is a hollow annular structure, and the piston rod 2 penetrates through an inner hole of the guide sleeve 8 and is installed in a matching mode with the small hole of the cylinder barrel.
A radial damping valve is machined at the position of the boundary matched with the main piston 5 at the excircle of the piston rod 2, the damping valve is usually composed of a one-way valve 4 and a normally-open hole, the normally-open hole is usually formed by connecting a first throttling hole 15 and a second throttling hole 16 in parallel, the one-way valve 4 is formed by connecting a small throttling hole and a large throttling hole in series, the small throttling hole is close to the inner hole 10 of the piston rod, a steel ball is added into the one-way valve 4, the diameter of the steel ball is between the diameter of the small throttling hole and the diameter of the large throttling hole, and is limited through the hole wall of a piston inner hole 51 of the main piston 5 to prevent the steel ball from falling out of the normally-open hole, and the area of the piston inner hole 51 covering.
The oil gas suspension rodless cavity is communicated with the inner hole 10 of the piston rod, and the check valve 4 and the normally open hole of the damping valve are used for communicating the oil gas suspension rod cavity and the inner hole 10 of the piston rod. When the piston rod 2 is compressed, the steel ball is jacked up by oil liquid, and the oil liquid in the rodless cavity can simultaneously pass through the first throttling hole 15, the second throttling hole 16 and the check valve 4 to enter the rod cavity; when the piston rod 2 is in a recovery stretching state, the steel ball is impacted downwards by oil, and the small throttling hole is blocked, so that the oil can only enter the rodless cavity through the first throttling hole 15 and the second throttling hole 16, and then a larger damping force value is generated to attenuate the vibration from the ground.
The outer circle of the lower portion of the piston rod 2 is machined into a structure of a conical surface 6, the taper is 1:8-1:10, the conical surface 6 of the piston rod 2 is inserted into a conical hole of a steering knuckle arm when a suspension system is installed, a circumferential end surface threaded hole 21 is machined in the lower end surface 22 of the piston rod, the piston rod and the steering knuckle arm are fastened and assembled together through bolts, and when a vehicle turns, synchronous rotating motion of the piston rod 2 along with the steering knuckle arm can be achieved. The oil drain hole 11 is machined in the center of the lower end face 22 of the piston rod 2, the number of the oil drain holes can be designed according to actual requirements, the oil drain holes 11 are communicated with the inner hole 10 of the piston rod, the plug is sealed, the plug is opened when oil is drained as required, and oil in the cylinder barrel can be drained conveniently due to the fact that the oil drain hole 11 is located at the lower end of oil gas suspension.
In addition, an oil filling channel 3 and an exhaust channel 17 are processed at the top end of the upper end cover 14 and are communicated with an oil chamber of the oil-gas suspension rodless cavity, an inflation valve 13 is assembled at the oil filling channel 3, and an exhaust plug 18 is assembled at the exhaust channel 17. When the oil gas suspension is filled with oil through the charging valve 13, the air in the cylinder barrel can be fully discharged by opening the exhaust channel 17, and the oil is sealed by the exhaust plug 18 after the oil filling is finished.
Further, as shown in fig. 1, in the small hole of the cylinder, a lubrication groove 30, a second guide belt 38, a third oil seal 31 and a dust ring 35 are sequentially arranged from one end of the guide sleeve 8, and are installed in cooperation with the rod body of the piston rod 2, a lubrication hole 7 and a pressure release valve 19 are arranged on the cylinder wall of the cylinder 1 corresponding to the lubrication groove 30, the lubrication hole 7 and the pressure release valve 19 are usually arranged on the cylinder 1 separately, the lubrication hole 7 is used for being connected with a centralized lubrication pipeline of a vehicle, so that grease can be periodically supplied to the lubrication groove 30, and the pressure release valve 19 is used for fully discharging air in the lubrication groove 30 when grease is supplied, so as to ensure that the grease is fully supplied.
A first guide belt 32, a first oil seal 36 and a second oil seal 37 are sequentially assembled in an inner hole of the guide sleeve 8 from one side of the oil-gas suspension main piston 5, a structure that two oil seals are connected in series is adopted, and the first guide belt 32 is arranged in front of the oil seals connected in series and close to an oil-gas suspension annular cavity and used for improving the lubricating environment; a first static seal 33 and a second static seal 41 are sequentially arranged on the outer circle of the guide sleeve 8 from one side of an oil-gas suspension annular cavity, and a protection ring 34 is arranged on the low-pressure side of a seal groove of the first static seal 33; the excircle of the guide sleeve 8 is matched with the large hole 20 of the cylinder barrel, so that the first static seal 33 and the second static seal 41 are extruded and deformed to achieve the purpose of sealing high-pressure oil. A threaded guide hole 39 is formed in the end face of the guide sleeve 8 facing the main piston 5 to facilitate the removal of the guide sleeve 8 from the cylinder 1.
The connecting plate 47 is welded on the outer side of the cylinder barrel 1, a certain number of reinforcing ribs 48 are welded between the connecting plate 47 and the cylinder barrel 1 and used for enhancing the connecting strength of the cylinder barrel 1 and the connecting plate 47, the connecting plate 47 can be processed into a split symmetrical structure to be fixedly connected with the cylinder barrel 1 so as to embody the advantages of light weight and low cost, and a certain number of plate through holes 50 are processed on the connecting plate 47 and used for being fastened and connected with a vehicle body through bolts; the back of the connecting plate 47 is provided with a key groove 49 for matching with a key on a vehicle body, and the key groove 49 is used for offsetting shearing force borne by a bolt when the hydro-pneumatic suspension bears force.
Candle oil gas hangs vertical installation on the car, link firmly with the automobile body through connecting plate 47, cylinder 1 and piston rod 2 play the effect of hanging the king pin, conical surface 6 disect insertion to the knuckle arm of piston rod 2 lower extreme, be used for connecting the wheel, because do not need extra guiding mechanism, suspension's atress is whole to be undertaken by the hydro-pneumatic spring body, so candle oil gas hangs has simple structure's characteristics, front axle in the mine field possesses wide prospect, in order to make piston rod 2 reach the most ideal state at the lateral force that the motion in-process received, generally set for 0 ~ 3 between with the contained angle between the axis of piston rod 2 and the connecting plate 47 baseplanes.
This kind of integral type candle oil gas hangs's characteristics lie in that uide bushing 8 arranges at the middle part of whole cylinder 1, and 1 upper end of cylinder is the normal work area of main piston 5, and 1 lower extreme of cylinder then is the lubrication and the support area of piston rod 2, because high-pressure seal arranges on uide bushing 8, even 2 lower extremes of piston rod appear colliding with, fish tail scheduling problem, can not influence the sealing performance that oil gas hung yet, has greatly improved the ability of product anti-seepage.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an integral type candle oil gas hangs, includes cylinder (1), piston rod (2), check valve (4), main piston (5), uide bushing (8), upper end cover (14), its characterized in that: the upper end of the cylinder barrel (1) is fixedly connected with the upper end cover (14) through bolts or threads, the piston rod (2) is of a hollow structure and is provided with a piston rod inner hole (10), and the piston rod (2) is connected with the main piston (5) of an annular structure; the inner hole of the cylinder barrel (1) is processed into a stepped hole, a cylinder barrel boss (40) is formed in the middle of the cylinder barrel (1), a cylinder barrel large hole (20) is formed in the upper portion of the cylinder barrel (1), a cylinder barrel small hole is formed in the lower portion of the cylinder barrel, and the diameter of the inner hole of the cylinder barrel large hole (20) is larger than that of the inner hole of the cylinder barrel small hole; a guide sleeve (8) and a piston rod assembly formed by combining a piston rod (2) and a main piston (5) are sequentially arranged at the upper end of the cylinder barrel (1), and the guide sleeve (8) is limited by a cylinder barrel boss (40) after being arranged; the main piston (5) makes linear reciprocating motion in a cylinder barrel large hole (20) between the guide sleeve (8) and the upper end cover (14); the guide sleeve (8) is of a hollow annular structure, and the piston rod (2) penetrates through an inner hole of the guide sleeve (8) and is installed in a matching manner with the small hole of the cylinder barrel; a radial damping valve is processed at the excircle of the piston rod (2), and the damping valve consists of a one-way valve (4) and a normally open hole; a rodless cavity of the hydro-pneumatic suspension is communicated with an inner hole (10) of the piston rod, and a check valve and a normally open hole of the damping valve are used for communicating a rod cavity of the hydro-pneumatic suspension with the inner hole (10) of the piston rod; the excircle of the lower part of the piston rod (2) is processed into a structure of a conical surface (6).
2. The integrated candle oil and gas suspension of claim 1, wherein: an oil drain hole (11) is machined in the center of the lower end face (22) of the piston rod (2), and the oil drain hole (11) is communicated with an inner hole (10) of the piston rod and sealed through a plug; an oil filling channel (3) and an exhaust channel (17) are processed at the top end of the upper end cover (14) and are communicated with an oil chamber of a rodless cavity in which oil gas is suspended, an inflation valve (13) is assembled at the oil filling channel (3), and an exhaust plug (18) is assembled at the exhaust channel (17).
3. The integrated candle oil and gas suspension of claim 1, wherein: in the cylinder aperture, have arranged lubrication groove (30), second guidance tape (38), third oil blanket (31) and dust ring (35) from the one end order of uide bushing (8) to with the body of rod cooperation installation of piston rod (2), arranged lubrication hole (7) and relief valve (19) on the section of thick bamboo wall that cylinder (1) corresponds lubrication groove (30), lubrication hole (7) and relief valve (19) separately arrange on cylinder (1).
4. The integrated candle oil and gas suspension of claim 1, wherein: the outer circle of the piston rod (2) is matched with a piston inner hole (51) of the main piston (5) for installation, an annular end face (52) is machined at the upper end of the piston inner hole (51), the inner diameter of the annular end face (52) is not smaller than the diameter of the piston rod inner hole (10), and after the piston rod (2) is assembled into the piston inner hole (51), the top end of the piston rod is contacted with the side face of the annular end face (52); meanwhile, a circumferential piston through hole (53) is machined in the annular end face (52) of the main piston (5), a circumferential threaded hole is machined in the top end, in contact with the annular end face (52), of the piston rod (2), and the piston through hole (53) is aligned with the circumferential threaded hole and then fixedly connected through a piston bolt (9) during assembly; a piston guide belt (42) is arranged on the outer circle of the main piston (5).
5. The integrated candle oil and gas suspension of claim 1, wherein: the piston rod (2) and the main piston (5) are processed by a threaded connection or integral forging forming method.
6. The integrated candle oil and gas suspension of claim 1, wherein: the normally through hole is formed by connecting a first throttling hole (15) and a second throttling hole (16) in parallel, a steel ball is added into the check valve (4), the part above the steel ball is a large throttling hole, the part below the steel ball is a small throttling hole, the small throttling hole is close to the inner hole (10) of the piston rod, the diameter of the steel ball is between the diameter of the small throttling hole and the diameter of the large throttling hole, the position is limited through the hole wall of the inner hole (51) of the piston of the main piston (5), and the area of the inner hole (51) covering the large throttling hole is not more than half of the cross section area.
7. The integrated candle oil and gas suspension of claim 1, wherein: the taper of the conical surface (6) at the lower part of the piston rod (2) is 1:8-1: 10; the lower end face (22) of the piston rod is provided with a circumferential end face threaded hole (21) which is fastened and assembled with the knuckle arm through a bolt.
8. The integrated candle oil and gas suspension of claim 1, wherein: a first guide belt (32), a first oil seal (36) and a second oil seal (37) are sequentially arranged in an inner hole of the guide sleeve (8) from one side of the main piston (5), and the first guide belt (32) is arranged in front of the first oil seal (36) and the second oil seal (37) which are connected in series and is close to an oil-gas suspension annular cavity; a first static seal (33) and a second static seal (41) are sequentially arranged on the excircle of the guide sleeve (8) from one side of the main piston (5), and a protection ring (34) is arranged on the low-pressure side of a seal groove of the first static seal (33); the excircle of the guide sleeve (8) is matched with the large hole (20) of the cylinder barrel, so that the first static seal (33) and the second static seal (41) are extruded and deformed; a guide threaded hole (39) is machined in the end face of the guide sleeve (8) facing the main piston (5).
9. The integrated candle oil and gas suspension of claim 1, wherein: the cylinder barrel is characterized in that a connecting plate (47) is welded on the outer side of the cylinder barrel (1), a certain number of reinforcing ribs (48) are welded between the connecting plate (47) and the cylinder barrel (1), the connecting plate (47) is processed into a split symmetrical structure and fixedly connected with the cylinder barrel (1), and a certain number of plate through holes (50) are processed on the connecting plate (47); a key groove (49) is processed on the back surface of the connecting plate (47).
10. The integrated candle oil and gas suspension of claim 9, wherein: the included angle between the central axis of the piston rod (2) and the bottom plane of the connecting plate (47) is 0-3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010116841.4A CN111520431A (en) | 2020-02-25 | 2020-02-25 | Integral candle type hydro-pneumatic suspension |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116841.4A CN111520431A (en) | 2020-02-25 | 2020-02-25 | Integral candle type hydro-pneumatic suspension |
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| CN111520431A true CN111520431A (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010116841.4A Pending CN111520431A (en) | 2020-02-25 | 2020-02-25 | Integral candle type hydro-pneumatic suspension |
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| CN202251617U (en) * | 2011-09-29 | 2012-05-30 | 中国北方车辆研究所 | Single cylinder type vibration damper |
| CN213017426U (en) * | 2020-02-25 | 2021-04-20 | 中国北方车辆研究所 | Integral candle type hydro-pneumatic suspension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739120A (en) * | 1953-08-24 | 1955-10-26 | Girling Ltd | Improvements in or relating to hydraulic dampers |
| CN2854204Y (en) * | 2005-10-17 | 2007-01-03 | 泰安航天特种车有限公司 | Oil-gas spring of heavy cross-country vehicle |
| CN200940654Y (en) * | 2006-06-12 | 2007-08-29 | 上海三一科技有限公司 | Replacing device of stretching spring |
| CN201373059Y (en) * | 2009-03-05 | 2009-12-30 | 浙江中兴减震器制造有限公司 | Bottom valve component of shock absorber |
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| CN213017426U (en) * | 2020-02-25 | 2021-04-20 | 中国北方车辆研究所 | Integral candle type hydro-pneumatic suspension |
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