Piston structure, air spring, suspension system and vehicle

Abstract

The utility model provides a piston structure, an air spring, a suspension system and a vehicle, the piston structure comprises a supporting part and a shell part, the supporting part comprises a supporting body and a first positioning boss, and the first positioning boss is arranged on the outer wall of the supporting body; the shell part comprises a shell body and a second positioning boss, and the shell body is arranged outside the supporting part in a sleeving manner; the second positioning boss is arranged on the inner wall of the shell body, and the second positioning boss and the first positioning boss are arranged in a stacked mode in the axial direction of the supporting component and detachably connected. According to the piston structure, the air spring, the suspension system and the vehicle, the dismounting difficulty of the shell part of the piston structure can be reduced, and then the efficiency of the air spring in the adjustment stage can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of air springs, and in particular relates to a piston structure, an air spring, a suspension system and a vehicle. Background Art

[0002] Air spring is an ideal elastic element. By adding high-pressure gas to the air spring and using the compressibility of air to achieve its elastic function, it has ideal nonlinear mechanical properties and is widely used in commercial vehicle cabs, train secondary suspensions, vehicle suspensions, equipment shock absorption, etc. The application of air springs provides vehicles with good ride comfort.

[0003] The stiffness of the air spring has a nonlinear characteristic, and its stiffness characteristic curve can be designed into a more reasonable curve according to actual needs. In the prior art, the piston structure of the air spring is mostly an integral structure. If a different stiffness characteristic curve is to be obtained, the piston structure needs to be replaced as a whole, which makes changing the stiffness characteristic curve more complicated and reduces the efficiency of the air spring adjustment stage. Utility Model Content

[0004] In order to address the shortcomings of the prior art, the present application provides a piston structure, an air spring, a suspension system and a vehicle, which are conducive to reducing the difficulty of obtaining different stiffness characteristic curves of the air spring, thereby helping to improve the efficiency of the air spring adjustment stage.

[0005] In a first aspect, the present application provides a piston structure, comprising:

[0006] A support component, the support component comprising a support body and a first positioning boss, the first positioning boss being arranged on an outer wall of the support body; and

[0007] The shell component comprises a shell body and a second positioning boss, wherein the shell body is sleeved outside the supporting component; the second positioning boss is arranged on the inner wall of the shell body, and the second positioning boss and the first positioning boss are stacked along the axial direction of the supporting component and are detachably connected.

[0008] In a possible embodiment, the number of the first positioning bosses is at least two, and the at least two first positioning bosses are arranged along the circumference of the support body. Two adjacent first positioning bosses are arranged at intervals along the circumference of the support component to form a gap, and the gap is used for the second positioning boss to pass through; the second positioning boss can pass through the gap and rotate around the axial direction of the support component.

[0009] In a possible embodiment, a limiting member is provided on the first positioning boss, and the limiting member is protruding toward the second positioning boss; a limiting groove is provided on the second positioning boss, and the limiting groove is recessed toward away from the first positioning boss; when the second positioning boss passes through the notch and rotates along the circumferential direction of the supporting component, the limiting member is received in the limiting groove.

[0010] In a possible implementation manner, there are multiple second positioning bosses, and the multiple second positioning bosses are arranged along the circumference of the shell body, and each second positioning boss corresponds to one first positioning boss.

[0011] In a possible embodiment, the number of the first positioning bosses is equal to the number of the second positioning bosses, and each second positioning boss is correspondingly installed on a first positioning boss; each first positioning boss is provided with a limiting member, and each second positioning boss is provided with a limiting groove; when the second positioning boss passes through the notch and rotates along the circumferential direction of the support component, each limiting member is received in a corresponding limiting groove.

[0012] In a possible implementation manner, the piston structure further includes a fastener, and the fastener is detachably disposed through the first positioning boss and the second positioning boss.

[0013] In a possible embodiment, the support component also includes a third positioning boss, and the third positioning boss is arranged on the outer wall of the support body, and the third positioning boss and the first positioning boss are arranged at an axial interval along the support body; one end of the shell body abuts against the third positioning boss, and the second positioning boss abuts against the first positioning boss.

[0014] In a second aspect, the present application provides an air spring, comprising:

[0015] The piston structure described above; and

[0016] The air bag is connected to one end of the supporting body.

[0017] In a third aspect, the present application provides a suspension system, comprising:

[0018] The air spring as described above; and

[0019] The damper supports the other end of the body.

[0020] In a fourth aspect, the present application provides a vehicle, comprising:

[0021] The suspension system described above.

[0022] The piston structure, air spring, suspension system and vehicle provided by the present application are stacked and detachably connected through the second positioning boss of the shell component and the first positioning boss of the support component, so as to facilitate the removal of the shell component from the support component. When a different stiffness characteristic curve of the air spring is required, it is only necessary to remove and replace the shell component from the support component without replacing the entire piston structure, which is beneficial to reducing the difficulty of obtaining different stiffness characteristic curves of the air spring, and further beneficial to improving the efficiency of the air spring adjustment stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a front view of a piston structure provided by an embodiment of the present application;

[0025] Figure 2 is a cross-sectional view of a piston structure provided by an embodiment of the present application;

[0026] Figure 3 is a structural diagram of a supporting component provided in one embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of a housing component provided in one embodiment of the present application;

[0028] Figure 5 is a front view of a fastener provided in one embodiment of the present application;

[0029] Figure 6 yes Figure 3 A partial enlarged view of the support member at position A shown;

[0030] Figure 7 yes Figure 4 A partial enlarged view of the shell component at position B is shown;

[0031] Figure 8 yes Figure 3 A partial enlarged view of the support member at position C shown;

[0032] Fig. 9 yes Figure 4 A partial enlarged view of the shell component at position D is shown;

[0033] Fig.10 This is an assembly flow chart of a piston structure provided in one embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0035] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "top", "side", "bottom", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of the present application, the "connection" and "connection" involved, if not otherwise specified, include direct connection (connection) and indirect connection (connection).

[0036] The present application provides a vehicle, which includes a suspension system, wheels and a body. The suspension system is connected between the wheels of the vehicle and the body of the vehicle. The function of the suspension system is to transmit all forces and moments acting between the wheels of the vehicle and the body of the vehicle, and to alleviate the impact load transmitted to the vehicle body by the uneven road surface, weaken the vibration of the load-bearing system caused thereby, so as to ensure the smooth driving of the vehicle, thereby improving the handling stability of the vehicle during driving.

[0037] The present application also provides a suspension system. Taking the suspension system applied to a vehicle as an example, the suspension system includes an air spring and a shock absorber. The air spring is used to support vertical loads and mitigate and suppress the vibration and impact of the vehicle caused by uneven roads. The shock absorber is connected to the air spring. The shock absorber is the main component of the suspension system for generating damping force. Its function is to quickly attenuate the vibration of the vehicle, improve the driving smoothness of the vehicle, and enhance the adhesion between the vehicle's wheels and the ground. In addition, the shock absorber can reduce the dynamic load of the vehicle's body part and extend the service life of the vehicle.

[0038] The present application also provides an air spring, taking the air spring applied to the suspension system as an example, the air spring includes a piston structure and an air bag, the air bag is connected to one end of the piston structure, and the shock absorber is connected to the other end of the piston structure. The air spring is used to support vertical loads, mitigate and suppress the vibration and impact of the vehicle caused by uneven roads.

[0039] Since the stiffness of the air spring is nonlinear, its stiffness characteristic curve can be designed into a more reasonable curve according to actual needs. However, the piston structure of the air spring in the prior art is mostly an integral structure. If a different stiffness characteristic curve is to be obtained, the piston structure needs to be replaced as a whole, which makes it more complicated to change the stiffness characteristic curve and reduces the efficiency of the air spring adjustment stage.

[0040] Based on this, the present application provides a piston structure to solve the above-mentioned problems in the prior art.

[0041] See also Figures 1 to 4 , Figure 1 is a front view of a piston structure provided by an embodiment of the present application, Figure 2 is a cross-sectional view of a piston structure provided in one embodiment of the present application, Figure 3 is a structural diagram of a supporting component provided in one embodiment of the present application, Figure 4 It is a cross-sectional view of a shell component provided in one embodiment of the present application.

[0042] This embodiment provides a piston structure 100, which is applied to an air spring. The piston structure 100 includes a support component 10 and a shell component 30. The support component 10 includes a support body 11 and a first positioning boss 12. The first positioning boss 12 is arranged on the outer wall of the support body 11. The shell component 30 includes a shell body 31 and a second positioning boss 32. The shell body 31 is sleeved outside the support component 10. The second positioning boss 32 is arranged on the inner wall of the shell body 31. The second positioning boss 32 and the first positioning boss 12 are stacked and detachably connected along the axial direction of the support component 10.

[0043] The piston structure 100 provided in the present application is stacked and detachably connected through the second positioning boss 32 of the shell component 30 and the first positioning boss 12 of the support component 10, so that the shell component 30 can be easily removed from the support component 10. When a different stiffness characteristic curve of the air spring is required, it is only necessary to remove the shell component 30 from the support component 10 and replace it with a shell component 30 of a different profile, without replacing the entire piston structure 100. This is beneficial to reducing the difficulty of obtaining different stiffness characteristic curves of the air spring, and further beneficial to improving the efficiency of the air spring adjustment stage.

[0044] It should be understood that in order to enable the support body 11 to be connected to the airbag of the air spring, the airbag is sleeved on the peripheral side wall of one end of the support body 11, and a tooth structure is provided on the peripheral side wall where the support body 11 is connected to the airbag, which is beneficial to improving the connection firmness between the airbag and the support body 11.

[0045] See also Figures 1 to 4 In some embodiments, the piston structure 100 further includes a fastener 50, which is detachably provided through the second positioning boss 32 and the first positioning boss 12, so that the second positioning boss 32 is detachably connected to the first positioning boss 12, thereby making the support component 10 detachably connected to the housing component 30. By providing the fastener 50, the relative movement between the second positioning boss 32 and the first positioning boss 12 is limited, so as to ensure that the stiffness consistency of the air spring formed by the piston structure 100 is good, which is conducive to improving the stability of the piston structure 100 during operation.

[0046] See also Figures 1 to 5 , Figure 5 It is a front view of a fastener provided in one embodiment of the present application.

[0047] In a specific embodiment, the fastener 50 is a bolt, and the fastener 50 is detachably provided with the second positioning boss 32 and the first positioning boss 12 along the axial direction of the support body 11 to limit the relative movement between the housing component 30 and the support component 10, thereby improving the stability of the piston structure 100. It is understandable that in some other embodiments, the fastener 50 can be a fastening component such as a pin, and the present application does not limit this. At the same time, the fastener 50 can be detachably provided with the second positioning boss 32 and the first positioning boss 12 along an axial direction different from the support body 11, and the present application does not limit this either.

[0048] See also Figures 1 to 7 , Figure 6 yes Figure 3 The partial enlarged view of the support component at A shown in FIG. Figure 7 yes Figure 4 A partial enlarged view of the shell component at point B is shown.

[0049] Furthermore, the first positioning boss 12 has a first mounting hole 121 that penetrates the support body 11 along the axial direction, and the second positioning boss 32 has a second mounting hole 321 that is arranged along the axial direction of the support body 11 on the side facing the first boss. The fastener 50 passes through the first mounting hole 121 and the second mounting hole 321, and the fastener 50 is threadedly connected to the first mounting hole 121 and the second mounting hole 321, so that the first positioning boss 12 and the second positioning boss 32 form a detachable connection structure, thereby forming a detachable connection structure between the shell component 30 and the support component 10.

[0050] See also Figures 1 to 7 In a specific embodiment, the number of the first positioning bosses 12 is at least two, and at least two first positioning bosses 12 are arranged along the circumference of the support body 11. Two adjacent first positioning bosses 12 are arranged along the circumference of the support component 10 at intervals to form a notch 13, and the notch 13 is used for the second positioning boss 32 to pass through. The second positioning boss 32 can pass through the notch 13 and rotate around the axial direction of the support component 10. In the process of installing the shell component 30 on the support component 10, the shell component 30 is first sleeved on the support component 10, and then the second positioning boss 32 of the shell component 30 passes through the notch 13 formed by the two adjacent first positioning bosses 12, and then the shell component 30 is rotated so that the second positioning boss 32 and the first positioning boss 12 form a stacked detachable connection structure, thereby forming a detachable connection structure between the shell component 30 and the support component 10. Among them, the size of the notch 13 should be set to a size that allows the second positioning boss 32 to pass freely, and the specific design should be designed according to the shape and size of the second positioning boss 32. The gap 13 is formed by spacing between two adjacent first positioning bosses 12 along the circumferential direction of the support body 11, so that the second positioning boss 32 can freely pass through the two adjacent first positioning bosses 12, thereby facilitating the formation of a stacked and detachable connection structure between the first positioning boss 12 and the second positioning boss 32. This is conducive to improving the installation efficiency between different housing components 30 and the support component 10, reducing the difficulty of obtaining different stiffness characteristic curves of the air spring, and thus helping to improve the efficiency of the air spring adjustment stage.

[0051] See also Figures 1 to 9 , Figure 8 yes Figure 3 The partial enlarged view of the support component at position C is shown. Fig. 9 yes Figure 4 The shell component shown is a partial enlarged view at D.

[0052] In a specific embodiment, a limiting member 122 is provided on the first positioning boss 12, and the limiting member 122 is provided to protrude toward the second positioning boss 32. A limiting member 122 is provided on the first positioning boss 12, and a limiting groove 322 is provided to be recessed toward away from the first positioning boss 12. When the second positioning boss 32 passes through the notch 13 and rotates along the circumference of the support component 10, the limiting member 122 is received in the limiting groove 322, and the limiting member 122 is used to limit the second positioning boss 32 from further rotating along the circumference of the support component. At the same time, the first mounting hole 121 on the first positioning boss 12 and the second mounting hole 321 on the second positioning boss 32 are configured to be aligned along the axial direction of the support component 10 when the limiting member 122 is received in the groove. By setting a limiting member 122 on the first positioning boss 12, the limiting member 122 is set on the first positioning boss 12, and the limiting member 122 cooperates with the limiting groove 322 to limit the second positioning boss 32 from further rotating along the circumferential direction of the support member, which can avoid the second positioning boss 32 from detaching from the first positioning boss 12, which is beneficial to improving the accuracy of the stacked structure formed between the first positioning boss 12 and the second positioning boss 32, and the connection stability between the first positioning boss 12 and the second positioning boss 32, thereby improving the stability of the connection between the shell component 30 and the support component 10. Moreover, the first mounting hole 121 on the first positioning boss 12 and the second mounting hole 321 on the second positioning boss 32 are configured to be aligned along the axial direction of the support component 10 when the limit member 122 is received in the groove, so that the fastener 50 can pass through the first mounting hole 121 and the second mounting hole 321, which is beneficial to improve the efficiency of the fastener 50 in fixing the first positioning boss 12 and the second positioning boss 32, reduce the difficulty of replacing the shell component 30, and thereby improve the efficiency of the air spring adjustment stage.

[0053] See also Figures 1 to 9 In a specific embodiment, the number of the second positioning bosses 32 is multiple, and the multiple second positioning bosses 32 are arranged along the circumference of the shell body 31, and each second positioning boss 32 is arranged corresponding to a first positioning boss 12. By arranging multiple second positioning bosses 32, and each second positioning boss 32 is arranged corresponding to a first positioning boss 12, the connection stability between the housing component 30 and the support component 10 is better, which is conducive to improving the overall structural stability of the piston structure 100.

[0054] See also Figures 1 to 9In a specific embodiment, the number of the first positioning bosses 12 is equal to the number of the second positioning bosses 32, the number of the notches 13 formed by the plurality of second positioning bosses 32 is equal to the number of the first positioning bosses 12, and each second positioning boss 32 is correspondingly installed on a first positioning boss 12. Each first positioning boss 12 is provided with a limiting member 122, and each second positioning boss 32 is provided with a limiting groove 322. When each second positioning boss 32 passes through a notch 13 and rotates along the circumferential direction of the support component 10, each limiting member 122 rotates toward a corresponding limiting groove 322. When each limiting member 122 is accommodated in a corresponding limiting groove 322, each second positioning boss 32 is stacked with each first positioning boss 12.

[0055] See also Figures 1 to 9 In a specific embodiment, the number of fasteners 50 is equal to the number of the first positioning boss 12 and the second boss, the number of the first mounting holes 121 on the first positioning boss 12 is equal to the number of fasteners 50, and the number of the second mounting holes 321 on the second positioning boss 32 is equal to the number of fasteners 50. When each stopper 122 is received in a corresponding stopper groove 322, the first mounting hole 121 on the first positioning boss 12 and the corresponding second mounting hole 321 on the second positioning boss 32 are aligned along the circumferential direction of the support component 10, so that the fastener 50 can pass through the first mounting hole 121 and the second mounting hole 321.

[0056] See also Figures 1 to 9 In this embodiment, the number of the first positioning bosses 12 is 4, the number of the second positioning bosses 32 is 4, the number of the fasteners 50 is 4, the number of the limiting members 122 is 4, the number of the limiting grooves 322 is 4, the number of the first mounting holes 121 is 4, and the number of the second mounting holes 321 is 4. It can be understood that in some other embodiments, the number of the first positioning bosses 12 can be 1, 2, 3, etc., the number of the second positioning bosses 32 can be 1, 2, 3, etc., the number of the fasteners 50 can be 1, 2, 3, etc., the number of the limiting members 122 can be 1, 2, 3, etc., the number of the limiting grooves 322 can be 1, 2, 3, etc., the number of the first mounting holes 121 can be 1, 2, 3, etc., and the number of the second mounting holes 321 can be 1, 2, 3, etc., and the present application does not limit this.

[0057] See also Figures 1 to 9In a specific embodiment, the support component 10 further includes a third positioning boss 14, which is disposed on the outer wall of the support body 11, and the third positioning boss 14 and the first positioning boss 12 are spaced apart along the axial direction of the support body 11. One end of the shell body 31 abuts against the third positioning boss 14, and the second positioning boss 32 abuts against the first positioning boss 12. The first positioning boss 12 and the third positioning boss 14 are disposed to limit the axial movement of the housing component 30 on the support component 10, which is beneficial to improve the connection stability between the housing component 30 and the support component 10, and further improve the overall structural stability of the piston structure 100.

[0058] The assembly and disassembly process of the piston structure 100 provided in the present application is described below in conjunction with the accompanying drawings.

[0059] See also Figures 1 to 10 , Fig.10 This is an assembly flow chart of a piston structure provided in one embodiment of the present application.

[0060] For the assembly of the piston structure 100:

[0061] The first step is to sleeve the shell component 30 outside the support component 10, and make the second positioning boss 32 of the shell component 30 pass through the notch 13 of the support component 10 along the axial direction of the support component 10;

[0062] The second step is to rotate the housing component 30 around the axial direction of the supporting component 10 so that the limiting member 122 on the first positioning boss 12 is matched with the limiting groove 322 on the second positioning boss 32;

[0063] In the third step, the fastener 50 is passed through the first mounting hole 121 on the first positioning boss 12 and the second mounting hole 321 on the second boss to form the assembled piston structure 100 .

[0064] For disassembly of the piston structure 100:

[0065] The first step is to remove the fastener 50 from the first mounting hole 121 on the first positioning boss 12 and the second mounting hole 321 on the second boss;

[0066] In the second step, the housing component 30 is rotated around the axial direction of the supporting component 10 (the direction of rotation is opposite to the direction during assembly), and the limiting member 122 on the first positioning boss 12 is disengaged from the limiting groove 322 on the second positioning boss 32;

[0067] In the third step, the second positioning boss 32 of the housing component 30 is passed through the notch 13 of the support component 10 along the axial direction of the support component 10, and the housing component 30 is removed from the outside of the support component 10 to form the components of the piston structure 100 after disassembly.

[0068] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A piston structure, characterized in that: include: A support component, the support component comprising a support body and a first positioning boss, wherein the first positioning boss is arranged on an outer wall of the support body; as well as The shell component comprises a shell body and a second positioning boss, wherein the shell body is sleeved outside the supporting component; the second positioning boss is arranged on the inner wall of the shell body, and the second positioning boss and the first positioning boss are stacked along the axial direction of the supporting component and are detachably connected.

2. The piston structure according to claim 1, characterized in that: The number of the first positioning bosses is at least two, and the at least two first positioning bosses are arranged along the circumference of the support body. Two adjacent first positioning bosses are arranged at intervals along the circumference of the support component to form a gap, and the gap is used for the second positioning boss to pass through; the second positioning boss can pass through the gap and rotate around the axial direction of the support component.

3. The piston structure according to claim 2, characterized in that: A limiting member is arranged on the first positioning boss, and the limiting member is arranged to protrude toward the second positioning boss; a limiting groove is arranged on the second positioning boss, and the limiting groove is arranged to be recessed toward away from the first positioning boss; when the second positioning boss passes through the notch and rotates along the circumferential direction of the supporting component, the limiting member is received in the limiting groove.

4. The piston structure according to claim 3, characterized in that: There are multiple second positioning bosses, and the multiple second positioning bosses are arranged along the circumference of the shell body, and each second positioning boss corresponds to one first positioning boss.

5. The piston structure according to claim 4, characterized in that: The number of the first positioning bosses is equal to the number of the second positioning bosses, and each second positioning boss is correspondingly installed on a first positioning boss; each first positioning boss is provided with a limiting member, and each second positioning boss is provided with a limiting groove; when the second positioning boss passes through the notch and rotates along the circumferential direction of the supporting component, each limiting member is received in a corresponding limiting groove.

6. The piston structure according to claim 1, characterized in that: The piston structure further includes a fastener, and the fastener is detachably disposed through the first positioning boss and the second positioning boss.

7. The piston structure according to claim 1, characterized in that: The support component also includes a third positioning boss, which is arranged on the outer wall of the support body, and the third positioning boss and the first positioning boss are arranged at an axial distance from each other along the support body; one end of the shell body abuts against the third positioning boss, and the second positioning boss abuts against the first positioning boss.

8. An air spring, characterized in that: include: The piston structure according to any one of claims 1 to 7; as well as The air bag is connected to one end of the supporting body.

9. A suspension system, characterized in that: include: The air spring according to claim 8; as well as The shock absorber is connected to the other end of the supporting body.

10. A vehicle, characterized in that: include: The suspension system of claim 9.

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