Waistband type air spring

Abstract

The utility model relates to the technical field of air springs, in particular to a waistband type air spring which comprises an air spring body, an upper cover is arranged at the top end of the air spring body, a lower cover is fixedly connected to the bottom end of the air spring body, and an elastic protection rod is connected to the top end of the lower cover in a sliding mode. A mounting cavity is formed in the top end of the upper cover, a stepped groove is formed in the bottom end of the inner wall of the mounting cavity, the stepped groove is connected with an air inlet nozzle through a mounting structure, and the top end of the air inlet nozzle is in threaded connection with a sealing cover. According to the utility model, the air inlet nozzle is more convenient to mount and dismount and simpler to position through the mutual matching among the air inlet nozzle, the connecting pipe, the bolt, the triangular convex block and other mounting structures, and the air inlet nozzle is better in sealing property after being mounted under the mutual matching among the air inlet nozzle, the sealing gasket and the stepped groove, so that the air inlet nozzle can be prevented from being damaged after being damaged, and the service life of the air inlet nozzle is prolonged. The disassembly and replacement of the air tap are simpler, and the air tap does not need to be welded again.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a belt-type air spring. Background Art

[0002] The air spring is a belt-type air spring non-metallic spring that is made by adding compressed air into a flexible sealed container and using the compressibility of air to achieve elasticity. It has excellent elastic properties, thereby improving the running comfort of the vehicle. And no matter how much the vehicle load is, it can be selected by changing the air pressure. The air spring (referred to as the airbag) is filled with compressed gas (air pressure is 0.5-1Mpa) in a sealed container, and uses the compressibility of the gas to achieve its spring effect. In this way, the airbag has ideal elastic properties.

[0003] When the air spring is working, the airbag needs to be inflated to maintain a certain working pressure. Usually, a cylinder is connected to the air spring's air inlet nozzle, and the air spring is inflated by the cylinder. When the air spring is shock absorbing for the car, it will vibrate, causing friction between the air inlet nozzle and the cylinder. However, many existing air nozzles are welded to the upper cover. When the air nozzle is damaged, it can only be removed and re-welded. The whole process is cumbersome. In addition, the airbag is mostly made of rubber. After long-term use, mechanical failures may occur or external reasons may cause the airbag to over-expand and break, causing personal injury to the user. Utility Model Content

[0004] The utility model aims to solve the disadvantage that many existing air nozzles are welded to the upper cover, and when the air nozzle is damaged, it can only be removed and re-welded, and the whole process is relatively cumbersome, and a belt-type air spring is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A belt-type air spring comprises an air spring body, an upper cover is arranged at the top end of the air spring body, a lower cover is fixedly connected to the bottom end of the air spring body, an elastic protection rod is slidably connected to the top end of the lower cover, an installation cavity is formed at the top end of the upper cover, a stepped groove is formed at the bottom end of the inner wall of the installation cavity, an air inlet nozzle is connected to the stepped groove via a mounting structure, and a sealing cover is threadedly connected to the top end of the air inlet nozzle.

[0007] Preferably, the outer wall of the elastic protection rod is slidably connected to a support rod, and both ends of the elastic protection rod are fixedly connected to bumps.

[0008] Preferably, a screw is fixedly connected to the top of the upper cover, a nut is threadedly connected to the outer wall of the screw, and a latch is slidably connected to the outer wall of the screw.

[0009] Preferably, the mounting structure includes a notch, evenly distributed threaded holes, a triangular protrusion, a bolt, a connecting pipe, and a sealing gasket. The notch is arranged at the edge of the step groove, and the threaded holes are arranged at the bottom end of the inner wall of the step groove.

[0010] Preferably, the triangular protrusion is fixedly connected to the outer wall of the air inlet nozzle, the bottom end of the bolt passes through the outer wall of the air inlet nozzle and is threadedly connected, the middle end of the connecting pipe is fixedly connected to the inner wall of the air inlet nozzle, and the sealing gasket is slidably connected to the outer wall of the air inlet nozzle.

[0011] Preferably, the air inlet nozzle is slidably connected to the inner wall of the stepped groove, the triangular protrusion is slidably connected to the notch, the bolt is threadedly connected to the threaded hole, and the top end of the connecting pipe is threadedly connected to the sealing cover.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. When the utility model is in use, the installation and disassembly of the air intake nozzle is more convenient and the positioning is simpler through the mutual cooperation between the air intake nozzle and the connecting pipe, bolts, triangular protrusions and other mounting structures. With the mutual cooperation between the air intake nozzle, the sealing gasket and the stepped groove, the air intake nozzle has better sealing after installation, so that after the air nozzle is damaged, the disassembly and replacement of the air nozzle becomes simpler and there is no need to re-weld the air nozzle.

[0014] 2. When the utility model is in use, the airbag inside the air spring can be protected by the elastic protection rod and the support rod arranged between the upper cover and the lower cover to avoid excessive expansion and danger. The elastic protection rod can be bent to a certain extent without affecting the expansion and deformation of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a belt-type air spring proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the top three-dimensional structure of an air spring body of a belt-type air spring proposed by the utility model;

[0017] Figure 3 The utility model is a three-dimensional structural schematic diagram of a mounting structure of a belt-type air spring.

[0018] In the figure: 1 air spring body, 2 upper cover, 3 lower cover, 4 elastic protection rod, 5 installation cavity, 6 step groove, 7 air inlet nozzle, 8 sealing cover, 9 support rod, 10 protrusion, 11 screw rod, 12 nut, 13 pin, 14 notch, 15 threaded hole, 16 triangular protrusion, 17 bolt, 18 connecting pipe, 19 sealing gasket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1-Figure 3 A belt-type air spring comprises an air spring body 1, an upper cover 2 is arranged at the top of the air spring body 1, a lower cover 3 is fixedly connected to the bottom end of the air spring body 1, an elastic protection rod 4 is slidably connected to the top end of the lower cover 3, an installation cavity 5 is opened at the top end of the upper cover 2, a stepped groove 6 is opened at the bottom end of the inner wall of the installation cavity 5, an air inlet nozzle 7 is connected to the stepped groove 6 through a mounting structure, and a sealing cover 8 is threadedly connected to the top end of the air inlet nozzle 7.

[0021] It should be noted that the specific model and specification of the air spring body 1 needs to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it is not repeated here.

[0022] Furthermore, a support rod 9 is slidably connected to the outer wall of the elastic protection rod 4 , and bumps 10 are fixedly connected to both ends of the elastic protection rod 4 .

[0023] The protrusion 10 penetrates through the outer walls of the upper cover 2 and the lower cover 3 and is slidably connected.

[0024] Furthermore, a screw rod 11 is fixedly connected to the top of the upper cover 2 , a nut 12 is threadedly connected to the outer wall of the screw rod 11 , and a latch 13 is slidably connected to the outer wall of the screw rod 11 .

[0025] The bottom end of the lower cover 3 is also provided with a screw 11, a nut 12, and a latch 13. The upper structure can help the air spring body 1 to be installed more tightly and not easily fall off.

[0026] Furthermore, the mounting structure includes a notch 14 , evenly distributed threaded holes 15 , a triangular protrusion 16 , a bolt 17 , a connecting pipe 18 , and a sealing gasket 19 . The notch 14 is arranged at the edge of the stepped groove 6 , and the threaded holes 15 are arranged at the bottom end of the inner wall of the stepped groove 6 .

[0027] The threaded hole 15 is disposed on the first step of the stepped groove 6 .

[0028] Furthermore, the triangular protrusion 16 is fixedly connected to the outer wall of the air inlet nozzle 7, the bottom end of the bolt 17 passes through the outer wall of the air inlet nozzle 7 and is threadedly connected, the middle end of the connecting pipe 18 is fixedly connected to the inner wall of the air inlet nozzle 7, and the sealing gasket 19 is slidably connected to the outer wall of the air inlet nozzle 7.

[0029] The triangular protrusion 16 is matched in size to the notch 14 , and the position of the bolt 17 is matched in size to the threaded hole 15 .

[0030] Furthermore, the air inlet nozzle 7 is slidably connected to the inner wall of the stepped groove 6 , the triangular protrusion 16 is slidably connected to the notch 14 , the bolt 17 is threadedly connected to the threaded hole 15 , and the top end of the connecting pipe 18 is threadedly connected to the sealing cover 8 .

[0031] Among them, the upper part of the connecting pipe 18 is provided with an external thread, and the lower part of the connecting pipe 18 is slidingly connected to the smaller hole of the stepped groove 6. The sealing gasket 19 is placed at the connection between the air inlet nozzle 7 and the stepped groove 6 to play a sealing role to prevent gas leakage.

[0032] Working principle: before the air inlet nozzle 7 is connected to the stepped groove 6, the sealing gasket 19 is first installed on the outer wall of the air inlet nozzle 7, and then the triangular protrusion 16 is installed in alignment with the position of the notch 14, and then the bolt 17 is twisted to connect the bolt 17 with the threaded hole 15, and finally the sealing cover 8 is connected to the connecting pipe 18 to complete the installation of the air inlet nozzle 7, and then the elastic protection rod 4 is connected to the upper cover 2 and the lower cover 3 through the protrusion at the top of the elastic protection rod 4, and then the support rod 9 is connected in series with the elastic protection rod 4, so that the elastic protection rod 4 is more solid, so that after the air nozzle is damaged, the disassembly and replacement of the air nozzle becomes simpler, and the air nozzle does not need to be re-welded. In addition, the elastic protection rod and the support rod protect the airbag inside the air spring to avoid excessive expansion and danger. The elastic protection rod can be bent to a certain extent without affecting the expansion and deformation of the airbag.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A belt-type air spring, comprising an air spring body (1), characterized in that: The top end of the air spring body (1) is provided with an upper cover (2), the bottom end of the air spring body (1) is fixedly connected to a lower cover (3), the top end of the lower cover (3) is slidably connected to an elastic protection rod (4), the top end of the upper cover (2) is provided with a mounting cavity (5), the bottom end of the inner wall of the mounting cavity (5) is provided with a stepped groove (6), the stepped groove (6) is connected to an air inlet nozzle (7) via a mounting structure, and the top end of the air inlet nozzle (7) is threadedly connected to a sealing cover (8).

2. A belt-type air spring according to claim 1, characterized in that: The outer wall of the elastic protection rod (4) is slidably connected to a support rod (9), and both ends of the elastic protection rod (4) are fixedly connected to bumps (10).

3. A belt-type air spring according to claim 1, characterized in that: The top end of the upper cover (2) is fixedly connected to a screw rod (11), the outer wall of the screw rod (11) is threadedly connected to a nut (12), and the outer wall of the screw rod (11) is slidably connected to a latch pin (13).

4. A belt-type air spring according to claim 1, characterized in that: The mounting structure comprises a notch (14), evenly distributed threaded holes (15), a triangular protrusion (16), a bolt (17), a connecting pipe (18), and a sealing gasket (19); the notch (14) is arranged at the edge of the stepped groove (6), and the threaded holes (15) are arranged at the bottom end of the inner wall of the stepped groove (6).

5. A belt-type air spring according to claim 4, characterized in that: The triangular protrusion (16) is fixedly connected to the outer wall of the air inlet nozzle (7), the bottom end of the bolt (17) penetrates the outer wall of the air inlet nozzle (7) and is threadedly connected, the middle end of the connecting pipe (18) is fixedly connected to the inner wall of the air inlet nozzle (7), and the sealing gasket (19) is slidably connected to the outer wall of the air inlet nozzle (7).

6. A belt-type air spring according to claim 5, characterized in that: The air inlet nozzle (7) is slidably connected to the inner wall of the stepped groove (6), the triangular protrusion (16) is slidably connected to the notch (14), the bolt (17) is threadedly connected to the threaded hole (15), and the top end of the connecting pipe (18) is threadedly connected to the sealing cover (8).

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