Rotary damping exhaust device of air spring

Abstract

The invention discloses an air spring rotary damping exhaust device which comprises a seat body with the top connected to the upper end of an air spring, an exhaust cavity is formed in the seat body, the bottom end of the seat body is an opening end communicated with the exhaust cavity, an exhaust channel is formed in the seat body, and one end of the exhaust channel is communicated to the top of the exhaust cavity. The other end of the exhaust channel extends to the surface of the seat body and is connected with a one-way air valve, a floating piston is arranged in the exhaust cavity, the floating piston is sleeved with the exhaust cavity in a sealing mode and can axially ascend and descend along the exhaust cavity, two rotary dampers distributed side by side are arranged on the floating piston, and a torsion spring is arranged in each rotary damper. The opposite ends of the two rotary dampers extend out of coaxial rotary damping rods, a reel is rotationally connected between the two rotary damping rods, a pull rope is connected to the reel in a wound mode, and the other end of the pull rope is connected to a machine core of the air spring. The exhaust triggering device is accurate and controllable in exhaust triggering, high in adaptability, simple in structure and easy to implement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air spring, in particular to a rotating damper exhaust device of air spring. BACKGROUND

[0002] In the vehicle suspension system, air spring is widely used due to its good damping performance and height adjustment ability. However, the existing air spring height control device has many deficiencies, especially the exhaust device. Some exhaust devices have complex structure, including multiple independent components and complex linkage mechanism, and the integration of numerous electronic components inside also leads to high manufacturing cost and increased failure rate of the device. Therefore, there is an urgent need for an exhaust device with simple structure and precise control of exhaust triggering conditions, so that automatic exhaust can be achieved efficiently under the stretched state of air spring through vehicle bumping. SUMMARY

[0003] The present application relates to the technical field of air spring, in particular to a rotating damper exhaust device of air spring.

[0004] The present application relates to the technical field of air spring, in particular to a rotating damper exhaust device of air spring.

[0005] As a preferred, the opposite end of the two rotating dampers is provided with a first mounting hole, the floating piston is provided with a second mounting hole, and the first mounting hole and the second mounting hole are connected by a fastener, so that the rotating dampers are connected to the floating piston by the fastener.

[0006] Further optimization, the limiting structure includes an annular groove provided on the inner wall of the open end, and a snap spring is arranged in the annular groove.

[0007] Further optimization, the top end of the floating piston is provided with an annular groove, and an O-shaped sealing ring is arranged in the annular groove. When the floating piston rises to the top end of the exhaust cavity, the O-shaped sealing ring tightly abuts against the end face of the top end of the exhaust cavity, thereby blocking the exhaust passage.

[0008] As preferred, the top end of the seat body is provided with a first threaded hole, and a lifting ring is screwed in the first threaded hole, and the seat body is suspended and connected to the upper end of the air spring through the lifting ring.

[0009] As preferred, one end of the one-way air valve is connected to the exhaust passage, and the other end extends to the outside of the upper end of the air spring through the air pipe.

[0010] Further optimization, the wire winding wheel is provided with a square hole in the center, the end of the rotation damper rod is a square end, and the square end is inserted into the square hole to form a positioning connection, so that the rotation damper rod and the wire winding wheel are connected.

[0011] Further optimization, the wire winding wheel is provided with a circular hole in the center, the end of the rotation damper rod is a cylindrical end, and the cylindrical end is inserted into the circular hole and is positioned and connected by a fastener, so that the rotation damper rod and the wire winding wheel are connected.

[0012] The technical effect of the present application is that a pure mechanical structure is adopted, without complex electronic components and linkage mechanisms, and only through the core components such as the floating piston, the wire winding wheel, and the rotation damper, the exhaust control is realized, and the manufacturing cost is greatly reduced; at the same time, the risk of electronic component failure is avoided, and the stability and reliability of the device in long-term use are improved, especially suitable for complex working conditions of vehicles, therefore, the structure is simple and low in cost, and occupies a small space of the air spring, and is convenient to maintain; with the aid of the non-constant damping force characteristics of the rotation damper, the exhaust is triggered only when the air spring is in a stretched state and the vehicle is jolted to generate sufficient instantaneous speed (the wire rope quickly pulls the wire winding wheel), which effectively avoids the false exhaust caused by slow operation (such as jack lifting), and ensures the stability of the suspension system; and the device can be directly adapted to the traditional air spring structure, without the need for large-scale modification of the original system, and is convenient for popularization and application in different vehicle models, therefore, the exhaust triggering is accurate and controllable, and the adaptability is strong. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the overall structure schematic diagram of the air spring to which the present application is installed.

[0014] Figure 2 is the structure appearance diagram of the present application.

[0015] Figure 3 is the structure sectional view of the present application.

[0016] Figure 4 is the structure sectional view of the present application in different working states.

[0017] In the figure: 1, seat body; 2, exhaust cavity; 3, exhaust passage; 4, floating piston; 5, O-shaped sealing ring; 6, lifting ring; 7, one-way air valve; 8, winding wheel; 9, rotary damper; 10, rotary damping rod; 11, clamping spring; 12, pull wire rope; 13, first mounting hole; 14, second mounting hole; 15, annular groove; 16, ring groove; 17, first threaded hole; 18, air pipe; 100, air spring; 101, upper end; 102, movement. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0019] The present application comprises a seat body 1, which is fixedly connected to the inside of the upper end 101 of the air spring 100, and is in a cylindrical structure. The seat body 1 is internally provided with an exhaust cavity 2, and the bottom end of the seat body 1 is an open end, which is communicated with the exhaust cavity 2. An exhaust passage 3 is formed in the seat body 1, one end of which is communicated with the top of the exhaust cavity 2, and the other end extends to the outer wall of the seat body 1 and is connected with a one-way air valve 7. The one-way air valve 7 is a conventional one-way valve joint on the market, one end of which is connected to the port of the exhaust passage 3 by a threaded connection, and the other end extends to the outside of the upper end 101 of the air spring 100 through an air pipe 18. When the exhaust condition is reached, the compressed air inside the air spring 100 will be discharged to the outside of the air spring 100 through the one-way air valve 7.

[0020] The exhaust cavity 2 is provided with a floating piston 4, the floating piston 4 is sleeved in the exhaust cavity 2 and can move axially along the exhaust cavity 2, the exhaust cavity 2 is a cylindrical cavity, the floating piston 4 is a cylindrical piston structure, a limiting structure is arranged on the inner wall of the open end of the exhaust cavity 2, which is used to prevent the floating piston 4 from moving downward and separating from the exhaust cavity 2, the bottom of the floating piston 4 is provided with two parallel distributed rotary dampers 9, each rotary damper 9 is internally provided with a torsional spring and a damping solution, the opposite ends of the two rotary dampers 9 are extended out of the coaxial rotary damping rods 10, the rotary damping rods 10 are rotatably connected with a winding wheel 8, the winding wheel 8 is centrally provided with a winding groove, the winding groove is woundly connected with a pull line 12, the other end of the pull line 12 is connected to the movement 102 of the air spring 100, the movement 102 drives the pull line 12 to be pulled downward, the pull line 12 drives the winding wheel 8, the winding wheel 8 drives the rotary damping rod 10 of the rotary damper 9 to rotate, that is, the rotary damping rod 10 is rotated by the torque, since the rotary damper 9 is internally provided with a buffer damping oil, a non-constant damping force can be provided, the size of the damping force changes according to the change of the torque received by the rotary damping rod 10, in addition, the rotary damper 9 is internally provided with a torsional spring, when the pull line 12 is not pulled by the movement 102, that is, the external torque is removed, the rotary damping rod 10 is automatically and slowly reset.

[0021] Further, the opposite ends of the two rotary dampers 9 are provided with first mounting holes 13, the floating piston 4 is provided with second mounting holes 14, the first mounting holes 13 and the second mounting holes 14 are connected by fasteners, so that the rotary dampers 9 are connected to the floating piston 4 by the fasteners.

[0022] Further, the limiting structure includes an annular groove 15 arranged on the inner wall of the open end, and a snap spring 11 arranged in the annular groove 15.

[0023] Further, the top end of the floating piston 4 is provided with an annular groove 16, and an O-shaped sealing ring 5 is arranged in the annular groove 16. When the floating piston 4 rises to the top end of the exhaust cavity 2, the O-shaped sealing ring 5 abuts against the top end face of the exhaust cavity 2, thereby blocking the exhaust passage 3.

[0024] Further, the top end of the seat body 1 is provided with a first threaded hole 17, and a lifting ring 6 is screwed in the first threaded hole 17, the seat body 1 is suspended and connected in the upper end 101 of the air spring 100 through the lifting ring 6, which is simple in structure and convenient to install.

[0025] Further, one end of the one-way air valve 7 is a threaded end, an inner thread is arranged in the open end of one end of the exhaust passage 3, one end of the one-way air valve 7 is screwed in the exhaust passage 3, and the other end is extended to the outside of the upper end 101 of the air spring 100 through the air pipe 18, that is, the one-way air valve 7 is detachably connected to the exhaust passage 3, the one-way air valve 7 adopts a conventional gas one-way valve, and specific models are not described here.

[0026] Further, the winding wheel 8 is centrally provided with a square hole, and the end of the rotation damping rod 10 is a square end, which is inserted into the square hole to form a positioning connection, so that the rotation damping rod 10 is connected with the winding wheel 8.

[0027] In another embodiment, the winding wheel 8 is centrally provided with a circular hole, and the end of the rotation damping rod 10 is a cylindrical end, which is inserted into the circular hole and is positioned and connected by a fastener, so that the rotation damping rod 10 is connected with the winding wheel 8.

[0028] In actual use, before the compressed gas is filled into the air spring 100, the seat body 1 is first fixed in the upper end 101 of the air spring 100 by the lifting ring 6, and then one end of the pull rope 12 is fixed on the core 102 of the air spring 100, and then the compressed gas is filled into the air spring 100. With the gradual increase of the air pressure in the air spring 100, the floating piston 4 originally resisted by the snap spring 11 is lifted by the air pressure, and the floating piston 4 moves to the top of the exhaust chamber 2. The O-shaped sealing ring 5 assembled on the top of the floating piston 4 is in close contact with the top of the exhaust chamber 2 to form a seal, thereby blocking the exhaust passage 3, and the exhaust module can stop exhausting. In this process, although part of the airflow will be released outside the air spring 100 through the gap between the exhaust chamber 2 and the floating piston 4, the inflation speed is always much greater than the exhaust speed.

[0029] As shown in FIG. 4-a, when the air spring 100 is in a compressed or normal state, the relative distance between the upper end 101 of the air spring 100 and the core 102 is short, and the pull rope 12 is in a relaxed state and cannot pull the floating piston 4 to move. At this time, since the air pressure in the air spring 100 is much greater than the external atmospheric pressure, the floating piston 4 is pressed tightly against the top of the exhaust chamber 2, and reliable sealing is achieved through the O-shaped sealing ring 5 on the top surface.

[0030] When the air spring 100 is in a stretched state, the relative distance between the upper end 101 of the air spring 100 and the core 102 is long, and the pull rope 12 is in a taut state. At this time, in the process of the car bumping, the distance between the core 102 and the upper end 101 of the air spring 100 will change constantly.

[0031] As shown in Fig. 4-b, when the pull cord 12 pulls the winding wheel 8 to rotate at a large speed, the winding wheel 8 will be subjected to a large damping torque due to the damping effect of the rotation damper 9, so that the pull cord 12 cannot be elongated in time to compensate the distance change between the upper end 101 and the core 102, which will make the floating piston 4 originally lifted to the top of the exhaust cavity 2 by the air pressure to be pulled down a distance along with the pull cord 12, further, the exhaust passage 3 originally sealed by the O-shaped sealing ring 5 is connected with the exhaust cavity 2, the compressed gas in the air spring 100 is discharged, then the floating piston 4 is reset by the air pressure difference between inside and outside of the air spring 100, and the pull cord 12 is reset by the torsional spring in the rotation damper 9.

[0032] As shown in Fig. 4-a, when the pull cord 12 slowly pulls the winding wheel 8 to rotate (such as the case of slowly lifting the vehicle chassis by using a jack), the damping torque of the rotation damper 9 acting on the winding wheel 8 is small, the pull cord 12 can be elongated in time to compensate the distance change between the upper end 101 and the core 102 of the air spring 100, and the floating piston 4 is always lifted to the top of the exhaust cavity 2 by the air pressure difference between inside and outside of the air spring 100, so that the exhaust cannot be realized. Thus, only when the air spring 100 is in the stretched state and the vehicle bounces to generate sufficient instantaneous speed, the compressed gas in the air spring 100 can be discharged, so as to effectively avoid the false exhaust caused by slow operation (such as jack lifting), and ensure the stability of the suspension system.

[0033] The present application is not limited to the above-mentioned best mode of implementation, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any changes in shape or structure, any technical solution with the same or similar to the present application falls within the protection scope of the present application.

Claims

1. A rotary damper air spring exhaust apparatus characterized by, The application relates to an air spring, which comprises a seat body (1) connected to the top end (101) of an air spring (100), an exhaust cavity (2) is formed in the seat body (1), the bottom end of the seat body (1) is an open end communicating with the exhaust cavity (2), an exhaust passage (3) is arranged in the seat body (1), one end of the exhaust passage (3) communicates with the top of the exhaust cavity (2), the other end of the exhaust passage (3) extends to the surface of the seat body (1) and is connected with a one-way air valve (7), a floating piston (4) is arranged in the exhaust cavity (2) and can axially ascend and descend along the exhaust cavity (2), a limiting structure for preventing the floating piston (4) from separating from the exhaust cavity (2) is arranged on the inner wall of the open end, two parallel rotary dampers (9) are arranged on the floating piston (4), torsional springs are arranged in the rotary dampers (9), coaxial rotary damping rods (10) are arranged at the opposite ends of the rotary dampers (9), a winding wheel (8) is rotatably connected between the rotary damping rods (10), a pull rope (12) is wound on the winding wheel (8), and the other end of the pull rope (12) is connected to the core (102) of the air spring (100).

2. The air spring rotational damping venting device of claim 1, wherein, First mounting holes (13) are formed at the opposite ends of the rotary dampers (9), second mounting holes (14) are formed in the floating piston (4), and the first mounting holes (13) and the second mounting holes (14) are connected through fasteners, so that the rotary dampers (9) are connected to the floating piston (4) through the fasteners.

3. The air spring rotational damping venting device of claim 2, wherein, The limiting structure comprises an annular groove (15) formed on the inner wall of the open end, and a snap spring (11) is arranged in the annular groove (15).

4. The air spring rotational damping venting device of claim 3, wherein, A ring groove (16) is formed at the top end of the floating piston (4), and an O-shaped sealing ring (5) is arranged in the ring groove (16). When the floating piston (4) ascends to the top end of the exhaust cavity (2), the O-shaped sealing ring (5) abuts against the top end surface of the exhaust cavity (2), so as to block the exhaust passage (3).

5. The air spring rotational dampening venting device of claim 1, wherein, A first threaded hole (17) is formed at the top end of the seat body (1), a lifting ring (6) is screwed in the first threaded hole (17), and the seat body (1) is suspended and connected in the upper end (101) of the air spring (100) through the lifting ring (6).

6. The air spring rotational dampening venting device of claim 1, wherein, One end of the one-way air valve (7) is connected to the exhaust passage (3), and the other end of the one-way air valve (7) extends to the outside of the upper end (101) of the air spring (100) through an air pipe (18).

7. The air spring rotational damping venting device of claim 2, wherein, A square hole is formed in the center of the winding wheel (8), the end of the rotary damping rod (10) is a square end, the square end is inserted into the square hole to form positioning connection, and the rotary damping rod (10) is connected with the winding wheel (8).

8. The air spring rotational dampening venting device of claim 2, wherein, A round hole is formed in the center of the winding wheel (8), the end of the rotary damping rod (10) is a cylindrical end, the cylindrical end is inserted into the round hole and is positioned and connected through fasteners, and the rotary damping rod (10) is connected with the winding wheel (8).

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