CN213017428U - Wheat type oil-gas suspension - Google Patents

Abstract

The utility model discloses a wheat formula oil gas hangs belongs to hydraulic machine technical field. The upper end of the cylinder barrel is fixedly connected with the upper hinge through welding or threaded connection, the piston rod is of a hollow structure, and an inner hole of the piston rod is machined; the large outer circle of the piston rod is matched with the inner hole of the hollow annular guide sleeve, and the guide sleeve is fixedly connected with the lower end face of the cylinder barrel through guide sleeve bolts which are circumferentially arranged; the piston rod is fixedly connected with a main piston of an annular structure through piston bolts arranged on the circumferential direction of the end face, and the large excircle of the piston rod is matched and installed with the inner hole of the main piston; and a radial damping valve is machined at the boundary position where the large excircle of the piston rod is matched with the main piston. The utility model discloses cylinder and piston rod among the suspension can act as the effect of swizzle, have simplified whole suspension's structure, possess wide use prospect in the mine field.

Description

Wheat type oil-gas suspension

Technical Field

The utility model relates to a wheat formula oil gas hangs belongs to hydraulic machine technical field.

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 front axle of the vehicle is usually a steering axle, an integral axle is adopted in the fields of a plurality of mines and the like, namely, the scheme mainly adopts non-independent suspension, and the thrust rod is used as a guide mechanism of a suspension system, so that although the stress environment of the hydro-pneumatic spring is improved, the structure is relatively complex, the cost is higher, the left wheel and the right wheel can interfere with each other in the driving process of the vehicle, and the stability control performance on an uneven road surface is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a wheat formula oil gas hangs, cylinder and piston rod can act as the effect of swizzle, have simplified whole suspension's structure through being connected with automobile body and lower xarm to realized the function that independently hangs, control the relative independent motion of side vehicle, possess wide use prospect in the mine field.

A wheat oil gas hangs, should hang including cylinder, piston rod, guide sleeve, steel ball, main piston, piston bolt, charge valve, upper hinge, guide sleeve bolt and lower pin shaft; the upper end of the cylinder barrel is fixedly connected with the upper hinge through welding or threaded connection, the piston rod is of a hollow structure, and an inner hole of the piston rod is machined; the large outer circle of the piston rod is matched with the inner hole of the hollow annular guide sleeve, and the guide sleeve is fixedly connected with the lower end face of the cylinder barrel through guide sleeve bolts which are circumferentially arranged; the piston rod is fixedly connected with a main piston of an annular structure through piston bolts arranged on the circumferential direction of the end face, and the large excircle of the piston rod is matched and installed with the inner hole of the main piston; a radial damping valve is processed at the boundary position where the large excircle of the piston rod is matched with the main piston 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 large excircle at the lower part of the piston rod is processed into a conical surface structure; an air release port is processed at the upper hinge and is communicated with the oil-gas suspension rodless cavity and sealed by a plug, and an inflation valve is installed on the upper hinge and is communicated with the oil-gas suspension rodless cavity; the joint bearing is assembled at the upper hinge, and an oil hole for performing centralized lubrication on the joint bearing is processed.

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 one side of 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, a rod cavity is hung in an inner hole of the annular guide sleeve from oil gas, a first guide belt, a first oil seal, a second guide belt and a dust ring are sequentially assembled outwards, and the guide belts are symmetrically arranged on two sides of the first oil seal and the second oil seal which are connected in series; the outer circle of the guide sleeve is provided with a static seal and a protection ring, and the protection ring is arranged on the low-pressure side in a seal groove of the static seal; the excircle of the guide sleeve is matched with the inner hole of the cylinder barrel, so that the static seal is extruded and deformed; the end, close to the oil gas suspension rod cavity, of the guide sleeve is provided with a small guide outer circle, the outer diameter of the small guide outer circle is smaller than that of an inner hole of the cylinder barrel, a guide annular cavity is formed between the small guide outer circle and the inner hole of the cylinder barrel, a piston annular boss is machined on the end face, facing the oil gas suspension rod cavity, of the main piston corresponding to the guide outer circle, and when the piston rod is pulled to the longest position, the piston annular boss enters the guide annular cavity.

Further, the piston rod and the main piston with the annular structure are processed by a method of threaded connection or integral forging forming.

Furthermore, an annular end face is processed at the upper end of the piston inner hole of the main piston, 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 in contact with the side face of the annular end face after the piston rod is assembled in 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 piston rod which is in contact with the annular end face, and the piston rod is fixedly connected through a piston bolt after being aligned during assembly; the excircle of the main piston is provided with a guide belt.

Furthermore, a circumferential end face threaded hole is processed in the lower end face of the piston rod and is fastened and assembled with the knuckle arm through a bolt; a lower pin shaft extends out of the center position of the lower end face of the piston rod, end face threaded holes are circumferentially and uniformly distributed around the lower pin shaft, a pin shaft threaded hole and an oil drain hole are processed in the lower end face of the pin shaft of the lower pin shaft, the lower pin shaft is matched with a ball bearing hole of a suspension lower cross arm after penetrating out of a knuckle arm conical hole, and then the lower pin shaft is fixedly connected with a bearing end cover through a bolt and the pin shaft threaded hole; a pin shaft step is processed on the excircle of the lower pin shaft and used for limiting the ball bearing; the oil drain hole is communicated with the inner hole of the piston rod and is sealed by a plug.

Further, the inflation valve and the oil filling hole on the upper hinge are arranged on the same side of the upper hinge; an inflation valve cap is arranged at the top end of the inflation valve and connected with the upper hinge through threads.

Further, the taper of the conical surface of the lower part of the piston rod is 1: 10.

Has the advantages that:

1. the utility model provides a wheat formula oil gas suspension structure, it passes through joint bearing and round pin axle and body connection to hang the hinge, the piston rod lower extreme is processed into the conical surface structure and is connected with the knuckle arm, the knuckle arm again with lower xarm connection, whole oil gas hangs though still be equivalent to the swizzle, still the old atress that mainly undertakes the axis direction still, compare with current suspension technique and need not attach other guiding mechanism again, it is simple to have the structure and atress, low cost, installation and maintenance convenient characteristics.

2. The utility model provides a wheat formula oil gas suspended structure mainly changes the dress piston assembly, inside core components such as sealed through the uide bushing of dismouting cylinder lower extreme, compares with prior art and is convenient for operate on the car, does not need to hang the jar promptly and wholly dismantle from the automobile body, only needs the uide bushing bolt of unscrewing to directly tear out inside components such as piston rod and piston and maintains or maintain, has greatly made things convenient for the simple operation nature under the field environment, possess fine popularization advantage.

3. The utility model provides a wheat formula oil gas suspended structure has hydraulic pressure buffering stop device through the structural innovation design at uide bushing and main piston contact terminal surface, when the main piston pulled the longest position, and the gap throttle that produces through hydraulic pressure can effectively prevent the rigidity striking of main piston and uide bushing terminal surface, has avoided appearing the piece and has leaded to the product to damage.

4. The utility model provides a wheat formula oil gas suspension structure, the tapering of the conical surface of piston rod lower part is generally designed for 1:10, proves through structural topology optimization, can fall to the minimum with the local stress concentration of piston rod, improves the atress environment, and can realize the most inseparable cooperation between the knuckle arm. In addition, a lower pin shaft extends out of the center of the lower end face of the piston rod, the integrated machining and forming are achieved, the coaxiality of products is guaranteed, an oil drain hole is machined in the lower end face of the pin shaft, the oil drain hole is additionally arranged and is arranged at the bottommost end of oil-gas suspension, oil in the cylinder barrel is drained under the field environment, and maintenance work such as oil-gas quantity matching is conducted again.

5. The utility model provides a wheat type oil-gas suspension structure, wherein a radial damping valve is processed on a piston rod and consists of a one-way valve and a normal through 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 normally-open 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 left side view of the hydro-pneumatic suspension;

FIG. 3 is a profile view of the hydro-pneumatic suspension;

FIG. 4 is a front cross-sectional view of the guide sleeve;

FIG. 5 is a left side view of the guide sleeve;

FIG. 6 is a front cross-sectional view of the master piston;

FIG. 7 is a left side view of the master piston;

FIG. 8 is a right side view of the hydro-pneumatic suspension.

In the figure: 1. the piston comprises a cylinder barrel, 2, a piston rod, 3, a guide sleeve, 4, a steel ball, 5, a main piston, 6, a conical surface, 7, an oil filling hole, 8, a pin shaft threaded hole, 9, a piston bolt, 10, a piston rod inner hole, 11, an oil drain hole, 12, an inflation valve cap, 13, an inflation valve, 14, an upper hinge, 15, a small throttling hole, 16, a large throttling hole, 17, a guide sleeve bolt, 18, an air drain hole, 19, a large outer circle, 20, a lower pin shaft, 21, an end face threaded hole, 22, a piston rod lower end face, 23, a pin shaft lower end face, 24, a pin shaft step, 31, a guide through hole, 32, a first guide belt, 33, a static seal, 34, a protection ring, 35, a dust ring, 36, a first oil seal, 37, a second oil seal, 38, a second guide belt, 39, a guide small outer circle, 40, a guide annular cavity, 51, a piston inner hole, 52, an annular end face.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings by way of examples.

The utility model provides a the utility model discloses a wheat formula oil gas suspended structure, as shown in FIG. 1, the steering axle in mining machinery and the heavy carrier loader field of multiaxis possess extensive application prospect. The upper end of the cylinder barrel 1 is fixedly connected with the upper hinge 14 through bolts, welding or threaded connection, the piston rod 2 is of a hollow structure, and a piston rod inner hole 10 is machined; the large outer circle 19 of the piston rod 2 is matched with the inner hole of the hollow annular guide sleeve 3, and the guide sleeve 3 is fixedly connected with the lower end face of the cylinder barrel 1 through guide sleeve bolts 17 which are circumferentially arranged; the piston rod 2 and the main piston 5 with the annular structure are fixedly connected together through piston bolts 9 arranged on the circumferential direction of the end surface, and what needs to be mentioned, the piston rod can also be processed by a threaded connection or integrated forging forming method; the large outer circle 19 of the piston rod 2 is matched with a piston inner hole 51 of the main piston 5, 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 provided with a guide belt.

A radial damping valve is processed at the boundary position where the large excircle 19 of the piston rod 2 is matched with the main piston 5 and generally consists of a one-way valve and a normally through hole, an oil-gas suspension rodless cavity is communicated with the inner hole 10 of the piston rod, and the one-way valve and the normally through hole of the damping valve are used for communicating the oil-gas suspension rod cavity with the inner hole 10 of the piston rod. The constant-through hole is formed by serially connecting a small throttling hole 15 and a large throttling hole 16, wherein the small throttling hole 15 is close to one side of the inner hole 10 of the piston rod, and oil in the rodless cavity sequentially enters the annular cavity with the rod through the small throttling hole 15 and the large throttling hole 16 to generate the damping throttling effect. The check valve is characterized in that a steel ball 4 is added into a normally-open hole, the diameter of the steel ball 4 is between the diameter of a small throttling hole 15 and the diameter of a large throttling hole 16, the position of the steel ball 4 is limited through the hole wall of a piston inner hole 51 of a main piston 5, the steel ball 4 is prevented from falling out of the normally-open hole, and the area of the piston inner hole 51 covering the large throttling hole 16 is not more than half of the cross section area of the large throttling hole 16.

When the oil-gas suspension piston rod 2 is compressed, the steel ball 4 is jacked up by oil liquid, and the oil liquid in the rodless cavity can simultaneously pass through the normally open hole and the one-way valve and enter the rod cavity; when the hydro-pneumatic suspension piston rod 2 is in a recovery stretching state, the steel ball 4 is impacted downwards by oil, the throttling small hole 15 can be blocked, so that the oil can only enter the rodless cavity through the normally through hole, and then a larger damping force value is generated to attenuate the vibration from the ground.

As shown in fig. 4-6, a first guide belt 32, a first oil seal 36, a second oil seal 37, a second guide belt 38 and a dust ring 35 are sequentially assembled in the inner hole of the annular guide sleeve 3 from the oil gas suspension rod cavity to the outside, a structure of connecting two oil seals in series is adopted, the guide belts are symmetrically arranged on two sides of the oil seals in series, so that the guide capability is exerted to the best, a static seal 33 and a protection ring 34 are installed on the excircle of the guide sleeve 3, and the protection ring is arranged on the low-pressure side in the seal groove; the excircle of the guide sleeve 3 is matched with the inner hole of the cylinder barrel 1, so that the static seal 33 is extruded and deformed to achieve the purpose of sealing high-pressure oil. A small guide outer circle 39 is machined at one end, close to the oil gas suspension rod cavity, of the guide sleeve 3, the outer diameter of the small guide outer circle is smaller than the inner hole of the cylinder barrel 1, a guide annular cavity 40 is formed between the small guide outer circle and the inner hole of the cylinder barrel 1, a piston annular boss 54 is machined on the end face, facing the oil gas suspension rod cavity, of the main piston 5 corresponding to the small guide outer circle, when the piston rod 2 is pulled to the longest position, the piston annular boss 54 enters the guide annular cavity 40, hydraulic buffering limiting is formed by extruding oil liquid, and rigid impact between the main piston 5 and the guide sleeve 3 is.

The large outer circle 19 at the lower part of the piston rod 2 is processed into a structure of a conical surface 6, the conicity is 1:10, the conical surface 6 of the piston rod 2 is inserted into a conical hole of a knuckle arm when a suspension system is installed, a circumferential end surface threaded hole 21 is processed at the lower end surface 22 of the piston rod, the piston rod and the 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 knuckle arm can be realized. A lower pin shaft 20 extends out of the center of a lower end face 22 of a piston rod 2, end face threaded holes 21 are circumferentially and uniformly distributed around the lower pin shaft 20, a pin shaft threaded hole 8 and an oil drain hole 11 are formed in the lower end face 23 of the pin shaft, the number of the pin shaft threaded holes can be designed according to actual requirements, the pin shaft threaded holes are matched with a ball bearing hole for hanging a lower cross arm after the lower pin shaft 20 penetrates out of a knuckle arm taper hole, a pin shaft step 24 is formed in the outer circle of the lower pin shaft 20 and used for limiting a ball bearing, and the lower cross arm is tightly connected with a bearing end cover through a bolt and the pin shaft threaded hole 8 to prevent the lower cross arm. The oil drain hole 11 is communicated with the inner hole 10 of the piston rod and is sealed by the plug, when oil drain is needed, the plug is opened, 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 the oil gas suspension.

In addition, as shown in fig. 8, a relief port 18 is formed in the position of the hydro-pneumatic suspension upper hinge 14 and communicated with the rodless chamber oil chamber, when the hydro-pneumatic suspension is filled with oil through the inflation valve 13, the relief port 18 is opened to fully discharge the air in the cylinder barrel, and after the oil filling is finished, the oil filling is sealed through a plug. The inflation valve 13 is communicated with the oil-gas suspension rodless cavity and used for inflating and deflating oil-gas media, an inflation valve cap 12 is further arranged at the top end of the inflation valve 13 and used for preventing the inflation valve 13 from being collided and damaged, and the inflation valve cap 12 is connected with the upper hinge 14 through threads; the upper hinge 14 is equipped with a knuckle bearing and is provided with an oil filler hole 7 for centralized lubrication of the knuckle bearing, and the inflation valve 13 and the oil filler hole 7 are generally arranged on the same side of the upper hinge 14 for convenient operation on the vehicle.

In summary, the above 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 (9)

1. Wheat formula oil gas hangs, including cylinder (1), piston rod (2), uide bushing (3), main piston (5), piston bolt (9), go up hinge (14), lower round pin axle (20), its characterized in that: the upper end of the cylinder barrel (1) is fixedly connected with the upper hinge (14) through bolts, welding or threaded connection, the piston rod (2) is of a hollow structure, and a piston rod inner hole (10) is machined; the large outer circle (19) of the piston rod (2) is matched with the inner hole of the hollow guide sleeve (3), and the guide sleeve (3) is fixedly connected with the lower end face of the cylinder barrel (1) through guide sleeve bolts (17) which are circumferentially arranged; the piston rod (2) is connected with the main piston (5); a radial damping valve is processed on the piston rod (2) and consists of a one-way valve and a normally open hole; the oil gas suspension rodless cavity is communicated with the inner hole (10) 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 (10) of the piston rod; the large excircle (19) at the lower part of the piston rod (2) is processed into a structure of a conical surface (6); a circumferential end face threaded hole (21) is processed on the lower end face (22) of the piston rod; a lower pin shaft (20) extends out of the center position of the lower end surface (22) of the piston rod (2), and end surface threaded holes (21) are uniformly distributed around the lower pin shaft (20) in the circumferential direction; the joint bearing is assembled at the upper hinge (14), and an oil filling hole (7) for performing centralized lubrication on the joint bearing is machined.

2. The wheat oil and gas suspension of claim 1, wherein: the constant-through hole is formed by connecting a small throttling hole (15) and a large throttling hole (16) in series, wherein the small throttling hole (15) is close to one side of the inner hole (10) of the piston rod, and oil in the oil-gas suspension rodless cavity sequentially enters the oil-gas suspension rod cavity through the small throttling hole (15) and the large throttling hole (16); the check valve is characterized in that a steel ball (4) is added into a normally-open hole, the diameter of the steel ball (4) is between the diameter of a small throttling hole (15) and the diameter of a large throttling hole (16), the position of the steel ball is limited through the hole wall of a piston inner hole (51) of a main piston (5), the steel ball (4) is prevented from falling out of the normally-open hole, and the area of the piston inner hole (51) covering the large throttling hole (16) is not more than half of the cross-sectional area of the large throttling hole (16).

3. A wheat oil and gas suspension as claimed in claim 1 or 2, characterized in that: a first guide belt (32), a first oil seal (36), a second oil seal (37), a second guide belt (38) and a dust ring (35) are sequentially installed in the inner hole of the guide sleeve (3) from one side of a rod cavity hung by oil gas, and the first guide belt and the second guide belt are symmetrically arranged on two sides of the first oil seal (36) and the second oil seal (37) which are connected in series; a static seal (33) and a protective ring (34) are arranged at the excircle of the guide sleeve (3), and the protective ring is arranged at the low-pressure side in a seal groove of the static seal (33); the excircle of the guide sleeve (3) is matched with the inner hole of the cylinder barrel (1) to ensure that the static seal (33) is extruded and deformed; a small guide outer circle (39) is machined at one end, close to the oil gas suspension rod cavity, of the guide sleeve (3), the outer diameter of the small guide outer circle is smaller than the inner hole of the cylinder barrel (1), a guide annular cavity (40) is formed between the small guide outer circle and the inner hole of the cylinder barrel (1), a piston annular boss (54) is machined on the end face, facing the oil gas suspension rod cavity, of the main piston (5) corresponding to the guide outer circle, and when the piston rod (2) is pulled to the longest position, the piston annular boss (54) enters the guide annular cavity (40).

4. The wheat oil and gas suspension of claim 3, wherein: the piston rod (2) and the main piston (5) are processed by a threaded connection or integrated forging forming method.

5. The wheat oil and gas suspension of claim 4, wherein: an annular end face (52) is machined at the upper end of a piston inner hole (51) of the main piston (5), the inner diameter of the annular end face (52) is not smaller than the diameter of a 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); 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 piston rod (2) which is in contact with the annular end face (52), and the piston through hole (53) is aligned with the circumferential threaded hole and then fixedly connected through a piston bolt (9) during assembly; the excircle of the main piston (5) is provided with a guide belt.

6. The wheat oil and gas suspension of claim 5, wherein: a pin shaft threaded hole (8) and an oil drain hole (11) are processed at the lower end surface (23) of the pin shaft of the lower pin shaft (20), the lower pin shaft (20) penetrates out of a knuckle arm taper hole, is matched with a ball bearing hole of a suspension lower cross arm, and is fastened and connected with a bearing end cover through a bolt and the pin shaft threaded hole (8); a pin shaft step (24) is processed on the excircle of the lower pin shaft (20) and used for limiting the ball bearing; the oil drain hole (11) is communicated with the inner hole (10) of the piston rod and is sealed by a plug.

7. The wheat oil and gas suspension of claim 1, wherein: the inflation valve (13) and the oil filling hole (7) on the upper hinge (14) are arranged on the same side of the upper hinge (14); an inflation valve cap (12) is further arranged at the top end of the inflation valve (13), and the inflation valve cap (12) is connected with the upper hinge (14) through threads.

8. The wheat 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: 10.

9. A wheat oil and gas suspension as claimed in claim 7 or 8, characterized in that: an air release port (18) is processed at the upper hinge (14) and is communicated with the oil-gas suspension rodless cavity and sealed by a plug, and an inflation valve (13) is installed on the upper hinge (14) and is communicated with the oil-gas suspension rodless cavity.

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