Lower seat structure

Abstract

The utility model provides a lower seat structure which comprises a lower seat core shaft, a plurality of bearing blocks, a first bearing piece, an elastic piece, a first limiting block, a first fastening piece, a second bearing piece, a first sealing ring and a second sealing ring. Each bearing block is clamped with the lower seat core shaft, and at least part of each bearing block is used for being clamped with the air bag; the lower seat structure has a first state that all the bearing blocks are fixedly connected with the air bag and a second state that all the bearing blocks are separated from the air bag, and the lower seat core shaft is movably arranged in the axial direction of the lower seat core shaft so that the lower seat core shaft can drive at least two of the bearing blocks to move upwards. Therefore, the lower seat structure is switched from the first state to the second state. The air spring solves the problem that in the prior art, the replacement cost of the air spring is high.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs for passenger cars, and more specifically, to a lower seat structure. Background Art

[0002] Due to the advantages of large load-bearing capacity, non-linear stiffness, and adjustable working height, air springs can endow vehicles with excellent shock absorption effects. Moreover, air springs can adjust the vehicle body height according to vehicle weight, vehicle speed, and road conditions, which can play functions such as fuel saving and protecting the vehicle body chassis.

[0003] The working mechanism of the air spring is to achieve the functions of vehicle shock absorption and vehicle body height adjustment by compressing the gas inside the airbag. Therefore, the reliability of the internal seal of the air spring is of great significance for realizing its normal functions. Generally speaking, air leakage of the air spring mainly occurs at the sealing position between the airbag and the lower seat, and this position is mainly sealed through a crimping process.

[0004] The crimping process is a process in which a crimping ring is squeezed to be in a radially interference fit with the airbag and the crimped part, that is, the lower seat, so as to be assembled together. Since the deformation of the crimping ring caused by crimping is irreversible, the air spring after crimping is non-detachable. When the airbag needs to be replaced, the separation of the airbag and the crimped part needs to be achieved by cutting the crimping ring. During the cutting process, the contact surface between the crimped part and the crimping ring is easily damaged, and the cut crimped part will cause air leakage and failure of the air spring after crimping, so that the crimped part cannot be recycled, resulting in a relatively high replacement cost of the air spring. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a lower seat structure to solve the problem of relatively high replacement cost of the air spring in the prior art.

[0006] To achieve the above purpose, the utility model provides a lower seat structure, including: a lower seat core shaft and a plurality of load-bearing blocks. The plurality of load-bearing blocks are sequentially arranged on the circumferential outer side of the lower seat core shaft along the circumferential direction of the lower seat core shaft. Each load-bearing block is clamped with the lower seat core shaft, and at least part of each load-bearing block is used for clamping with the airbag. The lower seat structure has a first state in which each load-bearing block is fixedly connected to the airbag, and a second state in which each load-bearing block is separated from the airbag. The lower seat core shaft is movably arranged along the axial direction of the lower seat core shaft, so that the lower seat core shaft drives at least two of the plurality of load-bearing blocks to move upward, so that the lower seat structure is switched from the first state to the second state.

[0007] Further, each bearing block includes a first contact surface and a second contact surface that are oppositely arranged along the radial direction of the lower seat core shaft. At least a part of the first contact surface is used for clamping with the airbag. A first avoidance groove is provided on the second contact surface, and the first avoidance groove is recessed away from the lower seat core shaft along the radial direction of the lower seat core shaft. An annular protrusion is provided on the circumferential outer side of the lower seat core shaft, and the annular protrusion is inserted into the first avoidance groove to clamp the lower seat core shaft and the bearing block.

[0008] Further, a second avoidance groove is also provided on the second contact surface, and the second avoidance groove is recessed away from the lower seat core shaft along the radial direction of the lower seat core shaft. Two protrusion parts are provided on the circumferential outer side of the lower seat core shaft, and the two protrusion parts are arranged in one-to-one correspondence with two of the multiple bearing blocks. When the lower seat core shaft moves upward, the upper end surface of each protrusion part abuts against the upper groove wall of the corresponding second avoidance groove, so that the lower seat core shaft drives two of the multiple bearing blocks to move upward, so that the lower seat core shaft is separated from the remaining bearing blocks among the multiple bearing blocks.

[0009] Further, the lower seat structure further includes a first bearing member and an elastic member. The lower seat core shaft is inserted through the first bearing member, and the bottom end surface of each bearing block abuts against the upper end surface of the first bearing member. The elastic member is sleeved on the lower seat core shaft, and one end of the elastic member is connected to the upper end surface of the first bearing member. When the lower seat structure is in the first state, the lower end surface of the protrusion part presses the other end of the elastic member, so that the elastic member undergoes elastic deformation; so as to restore the elastic deformation of the elastic member, so that the elastic member presses the protrusion part, so that the lower seat core shaft moves upward.

[0010] Further, the lower seat structure further includes a first limiting block and a first fastener. A limiting groove is provided on the side of the first bearing member away from the lower seat core shaft. At least a part of the first limiting block is inserted into the limiting groove. The lower seat core shaft is arranged above the first limiting block. The first fastener is detachably inserted through the first limiting block and the lower seat core shaft to tightly connect the lower seat core shaft and the first limiting block, so that the lower end surface of the protrusion part keeps pressing the elastic member.

[0011] Further, the lower seat structure further includes a second bearing member. A third avoidance groove is provided on the first contact surface of the bearing block, and a fourth avoidance groove is provided on the first bearing member. The third avoidance grooves and the fourth avoidance grooves of each bearing block jointly enclose an installation space for installing the second bearing member to support the airbag.

[0012] Further, the third avoidance groove has a first groove wall and a second groove wall, and the fourth avoidance groove has a third groove wall and a fourth groove wall. The first groove wall and the third groove wall both extend along the axial direction of the lower seat core shaft, and both the first groove wall and the third groove wall are in contact with the circumferential inner side surface of the second carrier. The second groove wall and the fourth groove wall both extend along the radial direction of the lower seat core shaft, and the second groove wall and the fourth groove wall are respectively in contact with the axial upper end surface and the axial lower end surface of the second carrier, so that the first carrier supports the second carrier.

[0013] Further, the first carrier is provided with a first fastening hole, and the second carrier is provided with a second fastening hole, so that a second fastener passes through the first fastening hole and the second fastening hole, so that the first carrier and the second carrier are firmly connected.

[0014] Further, a first sealing groove is provided on the third groove wall of the first carrier. The lower seat structure further includes a first sealing ring, and the first sealing ring is sleeved in the first sealing groove. The first sealing ring abuts against the circumferential inner side surface of the second carrier; and / or, the lower seat structure further includes a second sealing ring. A second sealing groove is provided on the circumferential outer side of the lower seat core shaft, and the second sealing ring is sleeved in the second sealing groove. The second sealing ring abuts against the circumferential inner wall of the first carrier.

[0015] Further, a plurality of clamping grooves are provided on the first contact surface, and the plurality of clamping grooves are arranged at intervals along the axial direction of the lower seat core shaft, so that at least part of the airbag is squeezed by the buckle into the clamping grooves, so that at least part of the first contact surface is clamped with the airbag.

[0016] Applying the technical solution of the present utility model, the lower seat structure includes a lower seat core shaft and a plurality of bearing blocks, and each bearing block is clamped with the lower seat core shaft. When the lower seat structure is in the first state, the buckle squeezes the airbag, so that the airbag is clamped with at least part of each bearing block. At this time, along the radial direction of the lower seat core shaft, the airbag and the lower seat core shaft jointly limit each bearing block. By driving at least two of the plurality of bearing blocks on the lower seat core shaft to move upward, the remaining bearing blocks are separated from the lower seat core shaft, so that the remaining bearing blocks are no longer limited by the lower seat core shaft. The remaining bearing blocks can move in the radial direction of the lower seat core shaft away from the airbag to separate from the airbag, so that the remaining bearing blocks no longer support the airbag, and the airbag is no longer in a taut state. At this time, the airbag can be separated from the two bearing blocks, so that the lower seat structure is switched to the second state, and further the airbag can be smoothly separated from the lower seat core shaft. Thus, without cutting each bearing block, each bearing block can be separated from the airbag, so that each bearing block can be recycled, thus solving the problem of high replacement cost of the air spring in the prior art, reducing the replacement cost of the air spring, and reducing resource waste. Description of the Drawings

[0017] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 Shows a schematic assembly structure diagram of the lower seat structure, airbag and buckle according to the present utility model;

[0019] Figure 2 Shows a schematic structural diagram of an embodiment of the lower seat structure according to the present utility model;

[0020] Figure 3 Shows a schematic structural diagram of the bearing block and the second bearing member of the lower seat structure according to the present utility model;

[0021] Figure 4 Shows a schematic structural diagram of the bearing block of the lower seat structure according to the present utility model.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 10, lower seat core shaft; 20, bearing block; 21, first contact surface; 22, second contact surface; 23, first avoidance groove; 11, annular protrusion; 24, second avoidance groove; 12, protrusion; 30, first bearing member; 40, elastic member; 50, first limit block; 61, first fastener; 70, second bearing member; 25, third avoidance groove; 80, second fastener; 81, first sealing ring; 82, second sealing ring; 26, clamping groove; 2, buckle; 1, airbag; 71, first support surface; 72, second support surface; 73, third support surface; 761, groove. Detailed implementation manners

[0024] It should be noted that the terms used here are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to this application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0027] Please refer to Figures 1 to 4 , the present utility model provides a lower seat structure, including: a lower seat core shaft 10 and a plurality of bearing blocks 20. The plurality of bearing blocks 20 are sequentially arranged on the circumferential outer side of the lower seat core shaft 10 along the circumferential direction of the lower seat core shaft 10. Each bearing block 20 is clamped with the lower seat core shaft 10, and at least part of each bearing block 20 is used for clamping with the airbag 1; the lower seat structure has a first state in which each bearing block 20 is fixedly connected to the airbag 1, and a second state in which each bearing block 20 is separated from the airbag 1. The lower seat core shaft 10 is movably arranged along the axial direction of the lower seat core shaft 10, so that the lower seat core shaft 10 drives at least two of the plurality of bearing blocks 20 to move upward, so that the lower seat structure is switched from the first state to the second state.

[0028] The lower seat structure of the present utility model includes a lower seat core shaft 10 and a plurality of bearing blocks 20. Each bearing block 20 is clamped with the lower seat core shaft 10. When the lower seat structure is in the first state, the buckle ring 2 presses the airbag 1, so that at least part of the airbag 1 is clamped with each bearing block 20. At this time, along the radial direction of the lower seat core shaft 10, the airbag 1 and the lower seat core shaft 10 jointly limit each bearing block 20. By driving at least two of the plurality of bearing blocks 20 on the lower seat core shaft 10 to move upward, the remaining bearing blocks 20 are separated from the lower seat core shaft 10, so that the remaining bearing blocks 20 are no longer limited by the lower seat core shaft 10. The remaining bearing blocks 20 can move in the radial direction of the lower seat core shaft 10 away from the airbag 1 to separate from the airbag 1, so that the remaining bearing blocks 20 no longer support the airbag 1, and the airbag 1 is no longer in a taut state. At this time, the airbag 1 can be separated from the two bearing blocks 20, so that the lower seat structure is switched to the second state, and further the airbag 1 can be smoothly separated from the lower seat core shaft 10. Thus, without cutting each bearing block 20, each bearing block 20 can be separated from the airbag 1, so that each bearing block 20 can be recycled, thereby solving the problem of high replacement cost of the air spring in the prior art, reducing the replacement cost of the air spring, and reducing resource waste.

[0029] Specifically, there are 8 bearing blocks 20, and each bearing block 20 occupies 1 / 8 of the circumference of the lower seat core shaft 10. By clamping each bearing block 20 with the lower seat core shaft 10, the lower seat core shaft 10 can limit each bearing block 20 along the axial direction of the lower seat core shaft 10. In this embodiment, each bearing block 20 includes a first contact surface 21 and a second contact surface 22 that are oppositely arranged along the radial direction of the lower seat core shaft 10. At least part of the first contact surface 21 is used for clamping with the airbag 1. A first avoidance groove 23 is provided on the second contact surface 22. The first avoidance groove 23 is recessed in the direction away from the lower seat core shaft 10 along the radial direction of the lower seat core shaft 10. An annular protrusion 11 is provided on the circumferential outer side of the lower seat core shaft 10. The annular protrusion 11 is inserted into the first avoidance groove 23 to clamp the lower seat core shaft 10 and the bearing block 20.

[0030] Specifically, by inserting the annular protrusion 11 into the first avoidance groove 23, the lower seat core shaft 10 and the bearing block 20 are clamped. At the same time, since at least part of the first contact surface 21 of the bearing block 20 is connected to the airbag 1, it is ensured that along the radial direction of the lower seat core shaft 10, the airbag 1 and the lower seat core shaft 10 jointly limit each bearing block 20, ensuring the structural stability of the lower seat structure when it is in the first state.

[0031] In this embodiment, a second avoidance groove 24 is further provided on the second contact surface 22. The second avoidance groove 24 is recessed in a direction away from the lower seat core shaft 10 along the radial direction of the lower seat core shaft 10; two protruding portions 12 are provided on the circumferential outer side of the lower seat core shaft 10, and the two protruding portions 12 are provided in one-to-one correspondence with two of the plurality of bearing blocks 20. When the lower seat core shaft 10 moves upward, the upper end surfaces of the respective protruding portions 12 abut against the upper groove walls of the corresponding second avoidance grooves 24, so that the lower seat core shaft 10 drives two of the plurality of bearing blocks 20 to move upward, so that the lower seat core shaft 10 is separated from the remaining bearing blocks 20 among the plurality of bearing blocks 20.

[0032] Specifically, by the upper end surfaces of the respective protruding portions 12 abutting against the upper groove walls of the corresponding second avoidance grooves 24, the lower seat core shaft 10 is connected to the two bearing blocks 20, ensuring that the lower seat core shaft 10 can drive two of the plurality of bearing blocks 20 to move upward, ensuring that the airbag 1 can be smoothly separated from the remaining bearing blocks 20, and further ensuring that the airbag 1 can be separated from all the bearing blocks 20.

[0033] Specifically, after the remaining bearing blocks 20 are separated from the lower seat core shaft 10, the two bearing blocks 20 still connected to the lower seat core shaft 10 can rotate around the lower seat core shaft 10 by a certain angle, so that the upper groove walls of the second avoidance grooves 24 of the two bearing blocks 20 no longer abut against the upper end surfaces of the protruding portions 12, and then pulling down these two bearing blocks 20 along the axial direction of the lower seat core shaft 10 can separate the airbag 1 from these two bearing blocks 20.

[0034] In this embodiment, the lower seat structure further includes a first bearing member 30 and an elastic member 40. The lower seat core shaft 10 is disposed through the first bearing member 30, and the bottom end surfaces of the respective bearing blocks 20 abut against the upper end surface of the first bearing member 30. The elastic member 40 is sleeved on the lower seat core shaft 10, and one end of the elastic member 40 is connected to the upper end surface of the first bearing member 30. When the lower seat structure is in the first state, the lower end surface of the protruding portion 12 presses the other end of the elastic member 40, so that the elastic member 40 undergoes elastic deformation; so that the elastic member 40 restores elastic deformation to press the protruding portion 12, so that the lower seat core shaft 10 moves upward.

[0035] Specifically, by the elastic member 40 restoring elastic deformation, the elastic member 40 presses the protruding portion 12, so that the lower seat core shaft 10 moves upward along the axial direction of the lower seat core shaft 10. The elastic member 40 is used to drive the movement of the lower seat core shaft 10. By stopping pressing the elastic member 40, the lower seat structure can be switched from the first state to the second state, making the separation of the airbag 1 and the lower seat structure simple and reliable.

[0036] Specifically, the elastic member 40 is a spring, and the compression force of the elastic member 40 can be adjusted according to the spring stiffness and the compression amount. The stiffness and the initial length of the elastic member 40 need to be determined according to the ejection force of the bearing block 20 after the airbag 1 is clamped, and it is necessary to ensure that the resilience of the elastic member 40 after compression is greater than the ejection force of the bearing block 20. Among them, the ejection force of the bearing block 20 after the airbag 1 is clamped can be obtained by means of experiments or simulations.

[0037] In this embodiment, the lower seat structure further includes a first limiting block 50 and a first fastener 61. A limiting groove is provided on a side of the first bearing member 30 away from the lower seat core shaft 10. At least a part of the first limiting block 50 is inserted into the limiting groove. The lower seat core shaft 10 is disposed above the first limiting block 50. The first fastener 61 is detachably inserted through the first limiting block 50 and the lower seat core shaft 10, so that the lower seat core shaft 10 and the first limiting block 50 are firmly connected, and the lower end surface of the convex portion 12 is kept pressing the elastic member 40.

[0038] Specifically, by inserting the first fastener 61 through the first limiting block 50 and the lower seat core shaft 10, the lower seat core shaft 10 and the first limiting block 50 are firmly connected, so as to axially limit the lower seat core shaft 10, ensuring that the lower end surface of the convex portion 12 keeps pressing the elastic member 40. When the lower seat structure is in the first state, the elastic member 40 is full of elastic force, thereby ensuring that the lower seat structure can smoothly switch from the first state to the second state.

[0039] Specifically, by pulling out the first fastener 61, the extrusion of the elastic member 40 can be stopped, and the lower seat structure can be switched from the first state to the second state, further ensuring the simple and reliable separation of the airbag 1 and the lower seat structure.

[0040] In this embodiment, the lower seat structure further includes a second bearing member 70. A third avoidance groove 25 is provided on the first contact surface 21 of the bearing block 20, and a fourth avoidance groove is provided on the first bearing member 30. The third avoidance grooves 25 of the respective bearing blocks 20 and the fourth avoidance grooves together form an installation space for installing the second bearing member 70, so that the second bearing member 70 supports the airbag 1.

[0041] Specifically, by placing the second bearing member 70 into the installation space, the first bearing member 30 supports the second bearing member 70, and the second bearing member 70 supports the bearing block 20 and the airbag 1, further ensuring the structural stability of the lower seat structure when it is in the first state and the support reliability of the lower seat structure for the airbag 1.

[0042] Specifically, a support surface is provided on the second carrier 70. The support surface includes a first support surface 71, a second support surface 72, and a third support surface 73 that are sequentially arranged along the axial direction of the lower seat core shaft 10. The first support surface 71 extends along the axial direction of the lower seat core shaft 10, the second support surface 72 extends along the radial direction of the lower seat core shaft 10, and the third support surface 73 is an arc surface.

[0043] Specifically, a plurality of grooves 761 are provided on the first support surface 71. The plurality of grooves 761 are spaced along the axial direction of the lower seat core shaft 10, so that at least part of the airbag 1 is squeezed by the buckle 2 into the grooves 761, so that the first support surface 71 and the airbag 1 are clamped, ensuring the clamping reliability between the airbag 1 and the second carrier 70 and reducing the risk of the airbag 1 disengaging from the second carrier 70.

[0044] During specific implementation, when the lower seat core shaft 10 drives at least two of the plurality of carrier blocks 20 to move upward until the remaining carrier blocks 20 are separated from the lower seat core shaft 10, the two carrier blocks 20 drive the airbag 1 to move upward, so that the airbag 1 is smoothly separated from the second carrier 70, and further the airbag 1 is smoothly separated from the lower seat structure.

[0045] In this embodiment, the third avoidance groove 25 has a first groove wall and a second groove wall, and the fourth avoidance groove has a third groove wall and a fourth groove wall. Both the first groove wall and the third groove wall extend along the axial direction of the lower seat core shaft 10, and both the first groove wall and the third groove wall are in contact with the circumferential inner surface of the second carrier 70; both the second groove wall and the fourth groove wall extend along the radial direction of the lower seat core shaft 10, and the second groove wall and the fourth groove wall are respectively in contact with the axial upper end surface and the axial lower end surface of the second carrier 70, so that the first carrier 30 supports the second carrier 70.

[0046] Specifically, by both the first groove wall and the third groove wall being in contact with the circumferential inner surface of the second carrier 70, and by the second groove wall and the fourth groove wall being respectively in contact with the axial upper end surface and the axial lower end surface of the second carrier 70, the connection reliability between the second carrier 70 and each carrier block 20 and the first carrier 30 is ensured.

[0047] Specifically, the circumferential inner surface of the second carrier 70 refers to the circumferential side surface of the second carrier 70 close to the lower seat core shaft 10.

[0048] In this embodiment, the first carrier 30 is provided with a first fastening hole, and the second carrier 70 is provided with a second fastening hole, so that the second fastener 80 passes through the first fastening hole and the second fastening hole to fasten and connect the first carrier 30 and the second carrier 70.

[0049] Specifically, the second fastener 80 passes through the first fastening hole and the second fastening hole, so that the first carrier 30 and the second carrier 70 are firmly connected, ensuring the connection reliability between the first carrier 30 and the second carrier 70, and ensuring that the first carrier 30 can smoothly support the second carrier 70.

[0050] Specifically, both the first fastener 61 and the second fastener 80 are screws; the number of the second fasteners 80 is 4 to 10.

[0051] In this embodiment, a first sealing groove is provided on the third groove wall of the first carrier 30. The lower seat structure further includes a first sealing ring 81. The first sealing ring 81 is inserted into the first sealing groove, and the first sealing ring 81 abuts against the inner circumferential surface of the second carrier 70; and / or, the lower seat structure further includes a second sealing ring 82. A second sealing groove is provided on the outer circumferential side of the lower seat core shaft 10. The second sealing ring 82 is inserted into the second sealing groove, and the second sealing ring 82 abuts against the inner circumferential wall of the first carrier 30.

[0052] Specifically, the first sealing ring 81 seals the gap between the second carrier 70 and the first carrier 30, preventing the gas inside the airbag 1 from leaking through the gap between the second carrier 70 and the first carrier 30; the second sealing ring 82 seals the gap between the first carrier 30 and the lower seat core shaft 10, preventing the gas inside the airbag 1 from leaking through the gap between the first carrier 30 and the lower seat core shaft 10.

[0053] In this embodiment, a plurality of clamping grooves 26 are provided on the first contact surface 21. The plurality of clamping grooves 26 are arranged at intervals along the axial direction of the lower seat core shaft 10, so that at least part of the airbag 1 is pressed by the buckle 2 into the clamping grooves 26, so that at least part of the first contact surface 21 is clamped with the airbag 1.

[0054] Specifically, at least part of the airbag 1 is pressed by the buckle 2 into the clamping grooves 26, so that at least part of the first contact surface 21 is clamped with the airbag 1, ensuring the connection reliability between the airbag 1 and the bearing block 20, and reducing the risk of the airbag 1 coming off the bearing block 20.

[0055] Specifically, the lower seat core shaft 10, the bearing block 20, the second carrier 70, the first carrier 30, the first limiting block 50 and the elastic member 40 are all made of metal; the first sealing ring 81 and the second sealing ring 82 are both made of rubber.

[0056] In specific implementation, the assembly steps of the lower seat structure of the present application are as follows: Place the first sealing ring 81 in the first sealing groove, apply silicone grease on the first sealing ring 81, place the second bearing member 70 in the first bearing member 30, and assemble the second bearing member 70 and the first bearing member 30 together through the second fastener 80. Then place the second sealing ring 82 in the second sealing groove, apply silicone grease on the second sealing ring 82, then combine 8 bearing blocks 20 with the lower seat mandrel 10 and place them upside down on the test bench. Then sleeved the elastic member 40 on the lower seat mandrel 10, place the assembled second bearing member 70 and the first bearing member 30 on the bearing blocks 20 and the elastic member 40, and compress the elastic member 40 with the aid of test equipment so that the second groove wall of the third avoidance groove 25 contacts the axial upper end surface of the second bearing member 70. Finally, place the first limiting block 50 on the first bearing member 30 and assemble the first limiting block 50 and the lower seat mandrel 10 together through the first fastener 61. Thus, the assembly of the lower seat structure of the present application is completed.

[0057] In terms of the normal use function of the air spring, the split lower seat structure provided by the present application is no different from the conventional lower seat and can provide support for the airbag buckling. However, when the air spring has failure phenomena such as airbag air leakage, the conventional lower seat can only decompose the lower seat and the airbag by cutting the buckle ring, and the cutting process often causes cuts to the lower seat, thus making it impossible to recycle the lower seat.

[0058] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0059] When the lower seat structure of the present utility model is in the first state, it can provide support for the airbag 1 to ensure the airtightness of the air spring. When the air spring needs to be disassembled, by removing and pulling out the first fastener 61, the components of the lower seat structure are disassembled in sequence and the lower seat structure is separated from the buckled airbag 1 without cutting the buckle ring 2, which can avoid damaging the bearing block 20 and the entire lower seat structure during the cutting process, ensuring the integrity and reusable value of the lower seat structure. Even if a certain component of the lower seat structure wears out during use, the worn component can be replaced separately to achieve recycling and reuse, avoiding overall scrapping.

[0060] The lower seat structure of the present utility model includes a lower seat core shaft 10 and a plurality of bearing blocks 20. Each bearing block 20 is clamped with the lower seat core shaft 10. When the lower seat structure is in the first state, the buckle 2 presses the airbag 1, so that at least part of the airbag 1 and each bearing block 20 are clamped. At this time, along the radial direction of the lower seat core shaft 10, the airbag 1 and the lower seat core shaft 10 jointly limit each bearing block 20. By driving at least two of the plurality of bearing blocks 20 on the lower seat core shaft 10 to move upward, the remaining bearing blocks 20 are separated from the lower seat core shaft 10, so that the remaining bearing blocks 20 are no longer limited by the lower seat core shaft 10. The remaining bearing blocks 20 can move radially away from the airbag 1 along the lower seat core shaft 10 to separate from the airbag 1, so that the remaining bearing blocks 20 no longer support the airbag 1, and the airbag 1 is no longer in a taut state. At this time, the airbag 1 can be separated from the two bearing blocks 20, so that the lower seat structure is switched to the second state, and then the airbag 1 can be smoothly separated from the lower seat core shaft 10. Thus, without cutting each bearing block 20, each bearing block 20 is separated from the airbag 1, so that each bearing block 20 can be recycled, thus solving the problem of high replacement cost of the air spring in the prior art, reducing the replacement cost of the air spring, and reducing resource waste.

[0061] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "above", etc., may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" another device or structure will then be oriented "below" or "under" the other device or structure. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the corresponding explanations of the spatial relative descriptions used herein will be made accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning, so they cannot be construed as limiting the protection scope of the present application.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A lower seat structure, characterized in that: include: A lower seat core shaft (10) and a plurality of bearing blocks (20), wherein the plurality of bearing blocks (20) are sequentially arranged on the circumferential outer side of the lower seat core shaft (10) along the circumferential direction of the lower seat core shaft (10), each of the bearing blocks (20) is clamped with the lower seat core shaft (10), and at least a portion of each of the bearing blocks (20) is used for clamping with the airbag (1); The lower seat structure has a first state in which each of the supporting blocks (20) is fixedly connected to the airbag (1), and a second state in which each of the supporting blocks (20) is separated from the airbag (1). The lower seat core shaft (10) is movably arranged along the axial direction of the lower seat core shaft (10) so that the lower seat core shaft (10) drives at least two of the multiple supporting blocks (20) to move upward, so that the lower seat structure switches from the first state to the second state.

2. The lower seat structure according to claim 1, characterized in that: Each of the supporting blocks (20) comprises a first contact surface (21) and a second contact surface (22) which are arranged opposite to each other along the radial direction of the lower seat core shaft (10); at least a portion of the first contact surface (21) is used for engaging with the airbag (1); a first avoidance groove (23) is arranged on the second contact surface (22); the first avoidance groove (23) is recessed along the radial direction of the lower seat core shaft (10) in a direction away from the lower seat core shaft (10); an annular protrusion (11) is arranged on the circumferential outer side of the lower seat core shaft (10); the annular protrusion (11) is penetrated in the first avoidance groove (23) so that the lower seat core shaft (10) and the supporting block (20) are engaged with each other.

3. The lower seat structure according to claim 2, characterized in that: A second avoidance groove (24) is also provided on the second contact surface (22), and the second avoidance groove (24) is recessed along the radial direction of the lower seat core shaft (10) in a direction away from the lower seat core shaft (10); two protrusions (12) are provided on the circumferential outer side of the lower seat core shaft (10), and the two protrusions (12) are arranged in a one-to-one correspondence with two of the plurality of bearing blocks (20). When the lower seat core shaft (10) moves upward, the upper end surface of each protrusion (12) abuts against the upper groove wall of the corresponding second avoidance groove (24), so that the lower seat core shaft (10) drives two of the plurality of bearing blocks (20) to move upward, so that the lower seat core shaft (10) and the remaining bearing blocks (20) of the plurality of bearing blocks (20) are separated.

4. The lower seat structure according to claim 3, characterized in that: The lower seat structure also includes a first bearing member (30) and an elastic member (40). The lower seat core shaft (10) is inserted into the first bearing member (30). The bottom end surface of each bearing block (20) is in contact with the upper end surface of the first bearing member (30). The elastic member (40) is sleeved on the lower seat core shaft (10). One end of the elastic member (40) is connected to the upper end surface of the first bearing member (30). When the lower seat structure is in the first state, the lower end surface of the protruding portion (12) squeezes the other end of the elastic member (40) to cause the elastic member (40) to undergo elastic deformation. The elastic deformation is restored by the elastic member (40) so that the elastic member (40) squeezes the protruding portion (12) to cause the lower seat core shaft (10) to move upward.

5. The lower seat structure according to claim 4, characterized in that: The lower seat structure also includes a first limit block (50) and a first fastener (61); a limit groove is provided on a side of the first carrier (30) away from the lower seat spindle (10); at least a portion of the first limit block (50) is inserted into the limit groove; the lower seat spindle (10) is arranged above the first limit block (50); and the first fastener (61) is detachably inserted through the first limit block (50) and the lower seat spindle (10) so that the lower seat spindle (10) and the first limit block (50) are tightly connected, so that the lower end surface of the protrusion (12) keeps squeezing the elastic member (40).

6. The lower seat structure according to claim 4, characterized in that: The lower seat structure also includes a second supporting member (70), a third avoidance groove (25) is provided on the first contact surface (21) of the supporting block (20), and a fourth avoidance groove is provided on the first supporting member (30), and the third avoidance groove (25) and the fourth avoidance groove of each supporting block (20) together form an installation space, and the installation space is used to install the second supporting member (70) so that the second supporting member (70) supports the airbag (1).

7. The lower seat structure according to claim 6, characterized in that: The third avoidance groove (25) has a first groove wall and a second groove wall, and the fourth avoidance groove has a third groove wall and a fourth groove wall, the first groove wall and the third groove wall both extend along the axial direction of the lower seat core shaft (10), and the first groove wall and the third groove wall both contact the circumferential inner side surface of the second bearing member (70); the second groove wall and the fourth groove wall both extend along the radial direction of the lower seat core shaft (10), and the second groove wall and the fourth groove wall respectively contact the axial upper end surface and the axial lower end surface of the second bearing member (70), so that the first bearing member (30) supports the second bearing member (70).

8. The lower seat structure according to claim 6, characterized in that: The first carrier (30) is provided with a first fastening hole, and the second carrier (70) is provided with a second fastening hole, so that a second fastener (80) can pass through the first fastening hole and the second fastening hole to fasten the first carrier (30) and the second carrier (70) together.

9. The lower seat structure according to claim 6, characterized in that: A first sealing groove is provided on the third groove wall of the first bearing member (30), the lower seat structure further comprises a first sealing ring (81), the first sealing ring (81) is inserted into the first sealing groove, and the first sealing ring (81) abuts against the circumferential inner side surface of the second bearing member (70); and / or The lower seat structure also includes a second sealing ring (82), a second sealing groove is provided on the circumferential outer side of the lower seat core shaft (10), the second sealing ring (82) is inserted into the second sealing groove, and the second sealing ring (82) abuts against the circumferential inner wall of the first bearing member (30).

10. The lower seat structure according to claim 2, characterized in that: A plurality of snap-fit ​​grooves (26) are provided on the first contact surface (21), and the plurality of snap-fit ​​grooves (26) are spaced apart along the axial direction of the lower seat core shaft (10), so that at least a portion of the airbag (1) is squeezed into the snap-fit ​​groove (26) by the buckle (2), so that at least a portion of the first contact surface (21) is snap-fitted with the airbag (1).

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