Volume adjustable structure of elastic and damping integrated air spring

Abstract

The utility model provides an elastic damping integrated air spring volume adjustable structure which comprises a fixed seat, an air bag, a movable piston, a damping rod and a damping cylinder, the upper end of the air bag is connected with the fixed seat, the lower end of the air bag is connected with the movable piston, the upper end of the damping rod is connected with the fixed seat, the lower end of the damping rod is arranged in the damping cylinder in a penetrating mode, and the damping cylinder is fixedly connected with the movable piston. An adjusting cavity is formed in the movable piston, an annular oil seal cover is arranged at the top of the vibration reduction cylinder, the inner wall of the oil seal cover is attached to the vibration reduction cylinder in a sealed mode, the outer wall of the oil seal cover abuts against the inner wall of the movable piston, a vent groove is further formed in the outer wall of the oil seal cover, and a detachable first annular sealing ring is further arranged on the outer wall of the oil seal cover. When the first annular sealing ring is connected between the oil seal cover and the movable piston, the first annular sealing ring seals the adjusting cavity. According to the structure, the air containing cavity in the air spring is adjustable, different rigidity requirements of the air spring are met, and the use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a spring-reducing integrated air spring with adjustable volume structure. Background Art

[0002] Air springs are sealed containers filled with compressed air, leveraging the compressibility of the gas to achieve their elastic properties. Air springs exhibit ideal nonlinear elastic properties. With the addition of a height adjustment mechanism, the vehicle body height remains constant with load changes, allowing for a lower spring rate for improved ride comfort. Air springs are widely used in automobiles to accelerate the attenuation of frame and body vibrations, improving ride comfort. However, existing bladder-type air springs are limited in size by the airbag, making it impossible to adjust the shock absorption effect based on changing road conditions, making them difficult to meet user needs. Utility Model Content

[0003] The technical problem to be solved by the present invention is that the volume of the airbag in the existing bag-type air spring is limited, and the shock absorption effect cannot be adjusted according to changes in road conditions, which makes it difficult to meet the user's usage needs. In order to overcome the above defects of the existing technology, the present invention provides an integrated spring-damping air spring with adjustable volume structure.

[0004] The utility model provides an elastic-damping integrated air spring volume adjustable structure, comprising a fixed seat, an airbag, a movable piston, a damping rod and a damping cylinder, the upper end of the airbag is connected to the fixed seat, the lower end of the airbag is connected to the movable piston, the upper end of the damping rod is connected to the fixed seat, the lower end of the damping rod is passed through the damping cylinder, the damping cylinder is fixedly connected to the movable piston and moves axially, an adjusting chamber is provided in the movable piston, an annular oil sealing cover is provided on the top of the damping cylinder, the inner wall of the oil sealing cover is sealed in contact with the damping cylinder, the outer wall of the oil sealing cover is abutted against the inner wall of the movable piston, a ventilation groove is further provided on the outer wall of the oil sealing cover, the ventilation groove is used to connect the adjusting chamber with the inner cavity of the airbag, and a detachable first annular sealing ring is further provided on the outer wall of the oil sealing cover. When the first annular sealing ring is connected between the oil sealing cover and the movable piston, the first annular sealing ring will seal the adjusting chamber.

[0005] Compared with the prior art, the present application discloses an integrated elastic-reducing air spring with adjustable volume structure, which has the following advantages: by arranging an adjustment chamber in the movable piston and providing a detachable first annular sealing ring on the oil seal cover, when the first annular sealing ring is connected to the oil seal cover, the adjustment chamber is sealed, that is, the airbag inner cavity is a gas chamber; when the first annular sealing ring is removed, the vent groove on the oil seal cover connects the adjustment chamber with the airbag inner cavity, that is, the gas chamber includes the airbag inner cavity and the adjustment chamber, so that the gas chamber is adjustable, thereby realizing different stiffness requirements of the air spring and effectively meeting the user's usage needs.

[0006] In a possible implementation manner, an annular groove is provided on the outer wall of the oil seal cover facing the movable piston, and the first annular sealing ring is placed in the annular groove.

[0007] Compared with the prior art, the above technical solution can ensure that the first annular sealing ring is stably arranged on the oil seal cover, thereby improving the sealing reliability of the first annular sealing ring.

[0008] In a possible implementation manner, the ventilation groove is axially arranged and passes through the annular groove. When a first annular sealing ring is arranged in the annular groove, the ventilation groove is blocked by the first annular sealing ring.

[0009] Compared with the existing technology, the above technical solution can facilitate the ventilation use of the ventilation groove and improve the stability of ventilation regulation.

[0010] In a possible implementation, a plurality of ventilation grooves are evenly spaced along the circumference.

[0011] Compared with the existing technology, the above technical solution can make the gas circulate quickly in the adjustment cavity and the airbag, making it easier to adjust the stiffness.

[0012] In a possible embodiment, the oil seal cover is integrally formed of PA6+GF50.

[0013] Compared with the prior art, the above technical solution can improve the structural reliability of the oil seal cover.

[0014] In a possible embodiment, the lower end of the movable piston is sealed with the shock-absorbing cylinder through a seal, and the seal includes an annular spring disk and a second annular sealing ring sleeved on the annular spring disk, the annular spring disk is sealed with the shock-absorbing cylinder, and the second annular sealing ring is sealed with the movable piston.

[0015] Compared with the existing technology, the above technical solution can improve the sealing reliability of the adjustment cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a partial enlarged view of the utility model;

[0018] Figure 3 It is a structural diagram of the oil seal cover;

[0019] Description of reference numerals:

[0020] 1. Fixed seat; 2. Airbag; 3. Moving piston; 31. Adjusting chamber; 4. Vibration damping rod; 5. Vibration damping cylinder; 6. Oil seal cover; 61. Vent groove; 62. Ring groove; 7. First annular sealing ring; 8. Annular spring disk; 9. Second annular sealing ring. DETAILED DESCRIPTION

[0021] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0022] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0023] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See also Figures 1 to 3The embodiment of the present application discloses an air spring with an adjustable volume of an integrated spring and damper, comprising a fixed seat 1, an airbag 2, a mobile piston 3, a damping rod 4 and a damping cylinder 5. The upper end of the airbag 2 is connected to the fixed seat 1, the lower end of the airbag 2 is connected to the mobile piston 3, the upper end of the damping rod 4 is connected to the fixed seat 1, the lower end of the damping rod 4 is passed through the damping cylinder 5, the damping cylinder 5 is fixedly connected to the mobile piston 3 and moves axially, the mobile piston 3 is provided with an adjusting chamber 31, and the top of the damping cylinder 5 is provided with a An annular oil seal cover 6, the inner wall of which is sealed against the shock absorber cylinder 5, and the outer wall of which is against the inner wall of the movable piston 3. A ventilation groove 61 is further provided on the outer wall of the oil seal cover 6, and the ventilation groove 61 is used to connect the regulating chamber 31 with the inner cavity of the airbag 2. A detachable first annular sealing ring 7 is further provided on the outer wall of the oil seal cover 6. When the first annular sealing ring 7 is connected between the oil seal cover 6 and the movable piston 3, the first annular sealing ring 7 will seal the regulating chamber 31.

[0026] As can be seen from the above, by setting an adjustment chamber 31 in the movable piston 3 and providing a detachable first annular sealing ring 7 on the oil seal cover 6, when the first annular sealing ring 7 is connected to the oil seal cover 6, the adjustment chamber 31 is sealed, that is, the inner cavity of the airbag 2 is a gas storage chamber. When the first annular sealing ring 7 is removed, the vent groove 61 on the oil seal cover 6 connects the adjustment chamber 31 with the inner cavity of the airbag 2, that is, the gas storage chamber includes the inner cavity of the airbag 2 and the adjustment chamber 31, so that the gas storage chamber is adjustable, thereby meeting the different stiffness requirements of the air spring and effectively meeting the user's usage needs.

[0027] In this embodiment, an annular groove 62 is provided on the outer wall of the oil seal cover 6 facing the movable piston 3, and the annular groove 62 is for the first annular sealing ring 7 to be placed therein, thereby enabling the first annular sealing ring 7 to be stably arranged on the oil seal cover 6 and improving the sealing reliability of the first annular sealing ring 7.

[0028] In this embodiment, the ventilation groove 61 is arranged axially and passes through the annular groove 62. When the first annular sealing ring 7 is arranged in the annular groove 62, the ventilation groove 61 is separated by the first annular sealing ring 7, that is, the adjustment cavity 31 is disconnected from the inner cavity of the airbag 2, thereby facilitating the ventilation use of the ventilation groove 61 and improving the ventilation adjustment stability.

[0029] In this embodiment, six vent grooves 61 are evenly spaced along the circumferential direction, thereby enabling the gas to circulate quickly in the adjustment cavity 31 and the airbag 2 , facilitating stiffness adjustment.

[0030] In this embodiment, the oil seal cover 6 is formed of PA6+GF50 as an integral part, thereby improving the structural reliability of the oil seal cover 6 .

[0031] In this embodiment, the lower end of the movable piston 3 is sealed with the shock-absorbing cylinder 5 through a seal, and the seal includes an annular spring disk 8 and a second annular sealing ring 9 sleeved on the annular spring disk 8. The annular spring disk 8 is sealed and fits with the shock-absorbing cylinder 5, and the second annular sealing ring 9 is fit with the movable piston 3, thereby improving the sealing reliability of the regulating chamber 31.

[0032] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0033] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0034] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A volume-adjustable air spring structure with integrated spring and damper, comprising a fixed seat (1), an airbag (2), a movable piston (3), a damping rod (4) and a damping cylinder (5), wherein the upper end of the airbag (2) is connected to the fixed seat (1), the lower end of the airbag (2) is connected to the movable piston (3), the upper end of the damping rod (4) is connected to the fixed seat (1), the lower end of the damping rod (4) is passed through the damping cylinder (5), the damping cylinder (5) is fixedly connected to the movable piston (3) and moves axially, and is characterized in that: An adjusting chamber (31) is provided in the movable piston (3), and an annular oil seal cover (6) is provided on the top of the damping cylinder (5). The inner wall of the oil seal cover (6) is sealed and fitted with the damping cylinder (5), and the outer wall of the oil seal cover (6) is against the inner wall of the movable piston (3). A vent groove (61) is also provided on the outer wall of the oil seal cover (6), and the vent groove (61) is used to connect the adjusting chamber (31) with the inner cavity of the airbag (2). A detachable first annular sealing ring (7) is also provided on the outer wall of the oil seal cover (6). When the first annular sealing ring (7) is connected between the oil seal cover (6) and the movable piston (3), the first annular sealing ring (7) will seal the adjusting chamber (31).

2. The volume adjustable structure of the elastic-reducing integrated air spring according to claim 1 is characterized in that: An annular groove (62) is provided on the outer wall of the oil seal cover (6) facing the movable piston (3), and the annular groove (62) is for the first annular sealing ring (7) to be placed therein.

3. The volume adjustable structure of the elastic-reducing integrated air spring according to claim 2, characterized in that: The ventilation groove (61) is arranged along the axial direction and passes through the annular groove (62). When a first annular sealing ring (7) is arranged in the annular groove (62), the ventilation groove (61) is blocked by the first annular sealing ring (7).

4. The volume adjustable structure of the elastic-reducing integrated air spring according to claim 3 is characterized in that: A plurality of the ventilation grooves (61) are evenly spaced and distributed along the circumference.

5. The volume adjustable structure of the elastic-reducing integrated air spring according to claim 4 is characterized in that: The oil seal cover (6) is formed in one piece from PA6+GF50.

6. The elastic-reducing integrated air spring volume adjustable structure according to claim 1, characterized in that: The lower end of the movable piston (3) is sealedly connected to the damping cylinder (5) via a sealing member, wherein the sealing member comprises an annular spring disk (8) and a second annular sealing ring (9) sleeved on the annular spring disk (8); the annular spring disk (8) is sealedly fitted to the damping cylinder (5), and the second annular sealing ring (9) is fitted to the movable piston (3).

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