CN213808608U - Air spring capable of transmitting torque - Google Patents

Abstract

The utility model relates to the technical field of shock absorbers, in particular to a torque-transferable air spring, which can not realize torque transfer in the prior shock absorber, and comprises an air spring body, wherein the air spring body comprises a connecting seat, an upper ball bowl, a lower ball bowl seat, a ball pin, a second-stage cylinder barrel component, a floating piston component, a first-stage cylinder barrel component, a piston rod component, a first-stage cylinder barrel component, a second-stage cylinder barrel component, a floating piston component, a piston rod component, a spline sleeve and a nut, wherein the spline sleeve and the piston rod are circumferentially positioned by a key and axially positioned by the nut, the nut is provided with a matched drilling hinge hole and penetrates through the pin for locking, the first-stage cylinder barrel is internally provided with a spline groove matched with the spline sleeve, so that torque transfer is realized, and after the spring is assembled on a vehicle suspension frame, the steering of a spring rotation-driven vehicle frame can be realized, has good development prospect in the field of the shock absorber.

Description

Air spring capable of transmitting torque

Technical Field

The utility model relates to a shock absorber technical field, in particular to transferable moment of torsion air spring.

Background

The shock absorber is used for inhibiting the vibration of the spring during rebound after vibration absorption and the impact from the road surface, for a long time, the main stream of the shock absorber for the suspension system of a special vehicle adopts the hydraulic shock absorber and the hydro-pneumatic spring, the corresponding structure maturity is higher, but the problems that the damping coefficient is greatly influenced by the viscosity of liquid, the temperature decay is obvious, the low-temperature performance of the shock absorber is poor and the like exist all the time.

The air spring generally refers to a spring which is filled with compressed air in a telescopic closed container and utilizes the elastic action of the air, and the existing air spring has the following characteristics: 1. the load is small, and the load is usually within 1000N; 2. the rigidity is insufficient, and the elastic suspension is usually applied to moving parts and supports after the vehicle door is opened and is used as an elastic unit of a suspension system; 3. after the existing air spring is produced, the pressure of the existing air spring cannot be adjusted, and a characteristic curve formed by the displacement and the output force value of the existing air spring is fixed.

In the car appearance governing system, adjust the car appearance through the change of the hydraulic oil volume in the hydro-pneumatic spring, nevertheless have following defect: the space layout in the vehicle is limited, so that the loading oil quantity of the hydro-pneumatic spring is limited, and the stroke of the hydro-pneumatic spring is limited to a certain extent; and the working medium of the hydraulic system is hydraulic oil, and the quick-response vehicle posture adjusting system is difficult to apply under the limitation of the layout on the vehicle, so that the adjusting speed of the hydro-pneumatic spring is slow, the adjusting time requirement of the vehicle posture adjusting system cannot be met, and meanwhile, the hydraulic shock absorber and the hydro-pneumatic spring cannot realize the transmission of torque, therefore, the air spring capable of transmitting the torque is designed.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming the defect of prior art, the utility model provides a transferable moment of torsion air spring solves the problem that current shock absorber can not realize the moment of torsion transmission.

Its technical scheme is, but air spring of transmission moment of torsion, including the air spring body, the air spring body includes the connecting seat, goes up the ball bowl, down the ball bowl, ball bowl seat, bulb round pin, second grade cylinder subassembly, floating piston subassembly, one-level cylinder subassembly, piston rod subassembly, first air chamber and second air chamber, piston rod subassembly includes piston rod, spline housing and nut, fix a position through key circumference between spline housing and the piston rod to carry out axial positioning through the nut, arbitrary position is joined in marriage to bore the reamed hole and is penetrated the pin and lock on the nut, the inside processing of one-level cylinder has the spline groove with spline housing complex, and spline structure can realize the transmission of moment of torsion, can directly realize the wheel and turn to along with the frame.

Furthermore, the second-stage cylinder barrel assembly comprises an upper end cover and a second-stage cylinder barrel, an inflation valve is installed on the upper end cover, the first-stage cylinder barrel assembly comprises a guide sleeve assembly, a spacer ring, a first-stage cylinder barrel, a pneumatic control one-way valve, a lower cover and a cylinder barrel base, the first air chamber is a closed space formed by the upper end cover, the second-stage cylinder barrel, a floating piston assembly and a piston rod assembly, the inflation valve is communicated with the first air chamber, the second air chamber is a closed space formed by the spacer ring, the first-stage cylinder barrel, the lower cover, the cylinder barrel base and the piston rod assembly, the pneumatic control one-way valve is communicated with the second air chamber and used for controlling inflation and deflation of the second air chamber, a vent hole is formed in the spline sleeve, the second-stage cylinder barrel assembly is connected with a dustproof sleeve, one end of the dustproof sleeve, which is far away from the second-stage cylinder barrel assembly, is provided with an exhaust hole for enabling the space between the floating piston assembly and the guide sleeve assembly to be communicated with the atmosphere in the retraction process of the first-stage cylinder barrel assembly, ensuring the smooth retraction of the primary cylinder barrel assembly.

Furthermore, one end of the guide sleeve assembly is provided with threads to be connected with the first-stage cylinder barrel, an annular groove is formed in the other end face of the guide sleeve assembly, and a cushion pad is mounted in the annular groove to prevent the guide sleeve assembly from being impacted with the floating piston assembly in the retraction process of the first-stage cylinder barrel assembly.

Furthermore, a first step and an internal thread are processed at one end of the primary cylinder barrel, a spacer ring is installed at the first step on the primary cylinder barrel and connected with the guide sleeve assembly through the internal thread, and a threaded hole and a second step are processed at the upper portion of the other end of the primary cylinder barrel and used for installing and positioning the pneumatic control one-way valve.

Furthermore, a third step and an internal thread are processed at one end of the lower cover and connected with the cylinder barrel base, a fourth outer step is arranged at the other end of the lower cover and used for being mounted with the first-stage cylinder barrel, and the step structure plays a role in positioning.

Furthermore, the pneumatic control one-way valve is fixedly arranged on the first-stage cylinder barrel through screws.

Furthermore, sealing rings are arranged between the inflation valve and the upper end cover, between the upper end cover and the piston rod assembly, between the floating piston assembly and the second-stage cylinder barrel assembly, between the spacer ring and the piston rod assembly, between the spacer ring and the first-stage cylinder barrel, and between the cylinder barrel base and the lower cover, so that air leakage is prevented.

Furthermore, the dustproof sleeve is connected with the second-stage cylinder barrel assembly through threads and is locked by a set screw.

Furthermore, the upper end cover is welded and fixed with the second-stage cylinder barrel.

Furthermore, the floating piston assembly and the primary cylinder barrel assembly are assembled on the piston rod assembly, and the secondary cylinder barrel assembly is arranged outside the floating piston assembly and the primary cylinder barrel assembly.

Furthermore, a thread is processed at one end of the ball pin, a thread is processed at the end part of the piston rod assembly and is connected with the ball pin through the thread, and a spline groove is processed at the other end of the ball pin and is connected with the frame, so that the steering of the wheel along with the frame is realized.

The working principle is as follows: the method comprises the steps that gas with certain pressure is pre-filled into a first air chamber from an inflation valve, a floating piston assembly is pushed to extend out along a piston rod assembly under the action of gas pressure, so that a first-stage cylinder barrel assembly is pushed to extend out along the piston rod assembly, when the floating piston assembly moves to a position contacting with the end face of a dustproof sleeve, the floating piston assembly stops moving and cannot continue to push the first-stage cylinder barrel to extend out, at the moment, a second air chamber is inflated through a pneumatic control one-way valve, the first-stage cylinder barrel assembly continues to extend out along the piston rod assembly under the action of gas pressure, when a spacer ring in the first-stage cylinder barrel assembly contacts with the end face of a spline sleeve in the piston rod assembly, the first-stage cylinder barrel assembly stops moving, at the moment, the first-stage cylinder barrel assembly moves to a limit position, and a product is located at a maximum stroke position; when one-level cylinder subassembly retracts, gaseous gas accuse check valve that passes through in the second air chamber is discharged to the atmosphere, air between floating piston subassembly and uide bushing subassembly is discharged to the atmosphere through the exhaust hole on the dustproof sleeve, at this moment, one-level cylinder subassembly is retracted smoothly, when one-level cylinder subassembly contacts the floating piston subassembly, one-level cylinder subassembly promotes the floating piston subassembly motion, thereby compress the gas of first air chamber, and simultaneously, second grade cylinder subassembly, the floating piston subassembly, one-level cylinder subassembly, the piston rod subassembly, dustproof sleeve all can be rotary motion under the drive of bulb round pin.

The technical effect of the utility model is, the double air chamber series connection structure that this air spring has, and set up the spline structure, realize the transmission of moment of torsion, directly realize the wheel along with turning to of frame, realize the transmission of energy as elastic medium with compressed air, it is great to overcome current shock absorber damping coefficient and receive the influence of liquid viscosity, the temperature decay is obvious, the not good shortcoming of low temperature performance, simple structure has, light in weight and advantages such as pollution-free, good buffering effect has, can realize the transmission of moment of torsion (1 KN m ~ 6KN m) simultaneously, the travelling comfort of vehicle has been improved, stability and security.

Drawings

Fig. 1 is the structure diagram of the shortest stroke of the present invention.

Fig. 2 is a schematic diagram of the middle stroke state structure of the present invention.

Fig. 3 is a schematic diagram of the maximum stroke state structure of the present invention.

Fig. 4 is a schematic view of the structure of the guide sleeve of the present invention.

Figure 5 is the one-level cylinder front view of the utility model.

Fig. 6 is a top view of the first-level cylinder of the present invention.

Fig. 7 is a schematic view of the spline housing of the present invention.

Fig. 8 is a schematic view of the structure of the dustproof sleeve of the present invention.

Fig. 9 is a graph of the static characteristic of the air guiding device according to the present invention.

In the figure: 1. a ball stud; 2. a connecting seat; 3. putting a ball bowl; 4. a ball bowl is arranged; 5. a ball bowl seat is arranged; 6. an inflation valve; 7. a secondary cylinder barrel assembly; 71. an upper end cover; 72. a second-stage cylinder barrel; 8. a floating piston assembly; 9. a first-stage cylinder barrel assembly; 91. a guide sleeve assembly; 911. a cushion pad; 92. a spacer ring; 93. a first-stage cylinder barrel; 94. a pneumatic control one-way valve; 95. a lower cover; 96. a cylinder barrel base; 10. a piston rod assembly; 101. a piston rod; 102. a spline housing; 1021. a vent hole; 103. a nut; 104. a key; 105. a pin; 11. tightening the screw; 12. a dust-proof sleeve; 121. an exhaust hole; 13. a first air chamber; 14. a second air chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The first embodiment is as follows: as shown in fig. 1 to 9, an air spring capable of transmitting torque comprises an air spring body, wherein the air spring body comprises a connecting seat 2, an upper ball bowl 3, a lower ball bowl 4, a lower ball bowl seat 5, a ball stud 1, a secondary cylinder barrel assembly 7, a floating piston assembly 8, a primary cylinder barrel assembly 9, a piston rod assembly 10, a first air chamber 13 and a second air chamber 14, the piston rod assembly 10 comprises a piston rod 101, a spline sleeve 102 and a nut 103, the spline sleeve 102 and the piston rod 101 are circumferentially positioned through a key 104 and axially positioned through the nut 103, any position on the nut 103 is provided with a reaming hole and is locked by penetrating a pin 105, a spline groove matched with the spline sleeve 102 is processed inside the primary cylinder 93 to realize the transmission of torque (1 KN m-6 KN m), the spline structure can realize the transmission of torque and can directly realize the steering of wheels along with a vehicle frame, the two-stage cylinder assembly 7 comprises an upper end cover 71 and a two-stage cylinder 72 which are fixed by welding, an inflation valve 6 is arranged on the upper end cover 71, the one-stage cylinder assembly 9 comprises a guide sleeve assembly 91, a spacer ring 92, a one-stage cylinder 93, a pneumatic control one-way valve 94, a lower cover 95 and a cylinder base 96, the first air chamber 13 is a closed space formed by the upper end cover 71, the two-stage cylinder 72, a piston rod assembly 10, a floating piston assembly 8 and the piston rod assembly 10, the inflation valve 6 is communicated with the first air chamber 13, the second air chamber 14 is a closed space formed by the spacer ring 92, the one-stage cylinder 93, the lower cover 95, the cylinder base 96 and the piston rod assembly 10, the pneumatic control one-way valve 94 is communicated with the second air chamber 14 and used for controlling inflation and deflation of the second air chamber 14 to enable controllable and adjustable pressure, 1021 vent holes are arranged on the spline housing 102, the two-stage cylinder assembly 7 is connected with a dustproof sleeve 12, the one end processing that secondary cylinder subassembly 7 was kept away from to dust sleeve 12 has exhaust hole 121 for the retraction in-process of one-level cylinder subassembly 9 makes the space intercommunication atmosphere between floating piston subassembly 8 and the uide bushing subassembly 91, ensures retrieving smoothly of one-level cylinder subassembly 9, floating piston subassembly 8 and one-level cylinder subassembly 9 all assemble on piston rod assembly 10, secondary cylinder subassembly 7 sets up in floating piston subassembly 8 and one-level cylinder subassembly 9 outsidely, piston rod assembly 10 one end processing has the screw thread, 1 one end processing of bulb round pin has the screw thread for connect piston rod assembly 10, 1 other end processing of bulb round pin has the spline groove for connect the frame, realize that the wheel turns to along with the frame.

Example two: on the basis of the first embodiment, one end of the guide sleeve assembly 91 is provided with a thread and connected with the first-stage cylinder 93, an annular groove is formed in the other end face of the guide sleeve assembly, a cushion 911 is arranged at the annular groove to prevent the guide sleeve assembly 91 from being impacted with the floating piston assembly 8 in the retraction process of the first-stage cylinder assembly 9, one end of the first-stage cylinder 93 is provided with a first step and an internal thread, the first step on the first-stage cylinder 93 is provided with a spacer ring 92 and connected with the guide sleeve assembly 91 through the internal thread, the upper part of the other end of the first-stage cylinder 93 is provided with a threaded hole and a second step for installing and positioning the pneumatic control check valve 94, one end of the lower cover 95 is provided with a third step and an internal thread and connected with the cylinder base 96, the other end of the lower cover 95 is provided with a fourth external step for welding and fixing with the first-stage cylinder 93, and the step structure plays a positioning role, the pneumatic control check valve 94 is fixedly installed on the first-stage cylinder barrel 93 through screws, between the inflation valve 6 and the upper end cover 71, between the upper end cover 71 and the piston rod assembly 10, between the floating piston assembly 8 and the second-stage cylinder barrel assembly 7, between the spacer ring 92 and the piston rod assembly 10, between the spacer ring 92 and the first-stage cylinder barrel 93, sealing rings are installed between the cylinder barrel base 96 and the lower cover 95, air leakage is prevented, and the dustproof sleeve 12 and the second-stage cylinder barrel assembly 7 are connected through threads and are locked through the set screw 11.

Example three: the corresponding bearing capacity is measured through the retraction distance of the air cylinder, a static characteristic curve of the air guide device is made, and the existence of the secondary air chamber can be obtained, so that when the static characteristic curve of the air guide device reaches a position close to 1130L/mm-1110L/mm, the static characteristic curve can be increased in a step mode, the curve forms stronger support along with the reduction of the installation distance, and the rigidity of the air guide device is stronger.

The working principle is as follows: the first air chamber 13 is pre-filled with gas with certain pressure from the inflation valve 6, under the action of the gas pressure, the floating piston assembly 8 is pushed to extend out along the piston rod assembly 10, so that the first-stage cylinder barrel assembly 9 is pushed to extend out along the piston rod assembly 10, when the floating piston assembly 8 moves to a position contacting with the end face of the dustproof sleeve 12, the floating piston assembly 8 stops moving and cannot continuously push the first-stage cylinder barrel 93 to extend out, at the moment, the second air chamber 14 is inflated through the pneumatic control one-way valve 94, under the action of the gas pressure, the first-stage cylinder barrel assembly 9 continues to extend out along the piston rod assembly 10, when the spacer ring 92 in the first-stage cylinder barrel assembly 9 contacts with the end face of the spline sleeve 102 in the piston rod assembly 10, the first-stage cylinder barrel assembly 9 stops moving, at the moment, the first-stage cylinder barrel assembly 9 moves to a limit position, and a product is located at a maximum stroke position; when one-level cylinder subassembly 9 retracts, gaseous gas accuse check valve 94 that passes through in the second air chamber 14 is discharged to the atmosphere, air between floating piston subassembly 8 and uide bushing subassembly 91 is discharged to the atmosphere through exhaust hole 121 on dustproof sleeve 12, at this moment, one-level cylinder subassembly 9 is withdrawed smoothly, when one-level cylinder subassembly 9 contacts floating piston subassembly 8, one-level cylinder subassembly 9 promotes floating piston subassembly 8 and moves, thereby compress the gas of first air chamber 13, and simultaneously, second grade cylinder subassembly 7, floating piston subassembly 8, one-level cylinder subassembly 9, piston rod subassembly 10, dustproof sleeve 12 all is rotary motion under the drive of bulb round pin 1.

The technical effect of the utility model is, the double air chamber series connection structure that this air spring has, and set up the spline structure, realize the transmission of moment of torsion, directly realize the wheel along with turning to of frame, realize the transmission of energy as elastic medium with compressed air, it is great to overcome current shock absorber damping coefficient and receive the liquid viscosity influence, the temperature decay is obvious, the not good shortcoming of low temperature performance, simple structure has, light in weight and advantages such as pollution-free, good buffering effect has, can realize the transmission of moment of torsion (1 KN m ~ 6KN m) simultaneously, the functional of air spring as suspension system's elastic element has been improved, the travelling comfort of vehicle has been improved indirectly, stability and security.

The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the invention, which should also be considered as within the scope of the invention.

Claims (10)

1. An air spring capable of transmitting torque comprises an air spring body and is characterized in that the air spring body comprises a connecting seat (2), an upper ball bowl (3), a lower ball bowl (4), a lower ball bowl seat (5), a ball pin (1), a secondary cylinder barrel component (7), a floating piston component (8), a primary cylinder barrel component (9), a piston rod component (10), a first air chamber (13) and a second air chamber (14), the piston rod assembly (10) comprises a piston rod (101), a spline sleeve (102) and a nut (103), the spline sleeve (102) and the piston rod (101) are circumferentially positioned through a key (104), and is axially positioned by a nut (103), a reaming hole is arranged on the nut (103) and a pin (105) is penetrated for locking, and a spline groove matched with the spline sleeve (102) is machined in the primary cylinder barrel (93).

2. The air spring capable of transmitting torque according to claim 1, wherein the second-stage cylinder assembly (7) comprises an upper end cover (71) and a second-stage cylinder (72), the upper end cover (71) is provided with an inflation valve (6), the first-stage cylinder assembly (9) comprises a guide sleeve assembly (91), a spacer ring (92), a first-stage cylinder (93), a pneumatic control one-way valve (94), a lower cover (95) and a cylinder base (96), the first air chamber (13) is a closed space formed by the upper end cover (71), the second-stage cylinder (72), the floating piston assembly (8) and the piston rod assembly (10), the inflation valve (6) is communicated with the first air chamber (13), and the second air chamber (14) is a closed space formed by the spacer ring (92), the first-stage cylinder (93), the lower cover (95), the cylinder base (96) and the piston rod assembly (10), the pneumatic control one-way valve (94) is communicated with the second air chamber (14), the spline sleeve (102) is provided with an air vent (1021), the secondary cylinder barrel component (7) is connected with the dustproof sleeve (12), and one end, far away from the secondary cylinder barrel component (7), of the dustproof sleeve (12) is provided with an exhaust hole (121).

3. An air spring capable of transmitting torque according to claim 2, wherein the guide sleeve assembly (91) is threaded at one end for connection with the primary cylinder (93) and has an annular groove formed at the other end thereof, and the cushion (911) is mounted in the annular groove.

4. The air spring capable of transmitting torque according to claim 2, wherein a first step and internal threads are formed at one end of the primary cylinder (93), a spacer ring (92) is mounted at the first step on the primary cylinder (93) and is connected with the guide sleeve assembly (91) through the internal threads, and a threaded hole and a second step are formed in the upper portion of the other end of the primary cylinder (93) and is connected with the pneumatic control one-way valve (94).

5. An air spring capable of transmitting torque according to claim 2, wherein one end of the lower cover (95) is provided with a third step and an internal thread and is connected with the cylinder base (96), and the other end of the lower cover (95) is provided with a fourth external step and is mounted with the primary cylinder (93).

6. An air spring capable of transmitting torque according to claim 2, wherein the air-operated check valve (94) is fixedly mounted on the primary cylinder (93) by screws.

7. An air spring capable of transmitting torque according to claim 2, wherein sealing rings are arranged between the inflation valve (6) and the upper end cover (71), between the upper end cover (71) and the piston rod assembly (10), between the floating piston assembly (8) and the secondary cylinder assembly (7), between the spacer ring (92) and the piston rod assembly (10), and between the spacer ring (92) and the primary cylinder (93), and between the cylinder base (96) and the lower cover (95).

8. An air spring capable of transmitting torque according to claim 2, wherein the dust sleeve (12) is screwed to the secondary cylinder assembly (7) and is locked by a set screw (11), and the upper end cover (71) is welded to the secondary cylinder (72).

9. An air spring for transmitting torque according to any one of claims 1 to 8, characterized in that the floating piston assembly (8) and the primary cylinder assembly (9) are mounted on a piston rod assembly (10), and the secondary cylinder assembly (7) is arranged outside the floating piston assembly (8) and the primary cylinder assembly (9).

10. An air spring capable of transmitting torque according to any one of claims 1 to 8, characterized in that one end of the ball stud (1) is threaded, the end of the piston rod assembly (10) is threaded and connected with the ball stud (1) through threads, and the other end of the ball stud (1) is splined and connected with the frame.

Images