Low-temperature-resistant and abnormal-sound-proof damper with double-isolation structure

Abstract

The utility model relates to the technical field of dampers, in particular to a low-temperature-resistant and abnormal-sound-proof damper with a double-isolation structure, which comprises a cylinder body, a front isolation piston and a rear isolation piston divide an inner cavity into a hydraulic oil cavity, a synthetic oil cavity and an air cavity, synthetic oil is filled in the synthetic oil cavity, a damping piston is arranged in the synthetic oil cavity, and the air cavity is communicated with the cylinder body. A piston rod is fixed to one side of the damping piston, the damping piston divides the synthetic oil cavity into a rod cavity and a rodless cavity, and the peripheral wall of the damping piston is partially attached to the cavity wall of the synthetic oil cavity so that the front oil cavity can communicate with the rear oil cavity. The damper is divided into three independent cavities which are not communicated with one another by the front isolation piston and the rear isolation piston, abnormal airflow sound caused by oil-gas mixing is avoided by the air cavity, and abnormal sound generated at a sealing part due to insufficient lubricating performance of synthetic oil can be avoided by hydraulic oil in the hydraulic oil cavity; the synthetic oil in the synthetic oil cavity solves the problem that a conventional damper is too slow to open and close or even cannot be opened and closed due to too large damping in an ultralow-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a low-temperature resistant and abnormal noise preventing damper with a double isolation structure. Background Art

[0002] A damper generally includes a cylinder body, a piston rod, a piston, a guide sleeve, a damping medium, etc. Its working principle is to fill a damping medium into a closed cylinder body to make the pressure in the cavity several times or dozens of times higher than the atmospheric pressure, and to realize the movement of the piston rod by utilizing the pressure difference generated by the cross-sectional area of ​​the piston rod being smaller than the cross-sectional area of ​​the piston. However, the damper in the prior art has a large abnormal noise during operation, and the damping medium has too much damping in a low temperature environment, resulting in the switch being too slow or even unable to open. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the problem that the damper in the prior art has a large abnormal noise during operation, and the damping medium has too much damping in a low temperature environment, resulting in the switch being too slow or even unable to open, a double isolation structure low temperature resistant and abnormal noise proof damper is provided.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a double-isolation structure low-temperature resistant and anti-abnormal noise damper, comprising a cylinder body with an inner cavity, a front isolation piston is provided at the front end of the inner cavity, and a rear isolation piston is provided at the rear end, the front isolation piston and the rear isolation piston divide the inner cavity into a hydraulic oil chamber, a synthetic oil chamber and an air chamber, the synthetic oil chamber is filled with synthetic oil, and a damping piston is slidably arranged in the synthetic oil chamber, a piston rod is fixed to one side of the damping piston and the damping piston divides the synthetic oil chamber into a rod chamber and a rodless chamber, and the outer peripheral wall of the damping piston is partially fitted with the cavity wall of the synthetic oil chamber to connect the rodless chambers to the rodless chambers.

[0005] Furthermore, the axial cross-section of the damping piston includes a first outer side wall and a second outer side wall that are relatively arranged, and the axial cross-section of the synthetic oil chamber includes a first inner side wall and a second inner side wall that are relatively arranged, the first outer side wall is in contact with the first inner side wall, and a gap is left between the second outer side wall and the second inner side wall to form a damping groove for the circulation of synthetic oil.

[0006] Furthermore, the height h of the damping groove gradually increases from the front to the back and then remains unchanged.

[0007] Furthermore, the air cavity is filled with nitrogen.

[0008] Furthermore, a guide sleeve is provided at the front end of the inner cavity and a seal is provided between the guide sleeve and the front isolation piston, and hydraulic oil is filled between the seal and the front isolation piston to form the above-mentioned hydraulic oil chamber.

[0009] Furthermore, the piston rod extends forwardly from the cylinder body and is connected to a front joint, and the rear end of the cylinder body is connected to a rear joint.

[0010] The beneficial effects of the utility model are as follows: the utility model utilizes the front isolation piston and the rear isolation piston to divide the damper into three independent chambers which are not connected to each other. The independent air chambers eliminate the abnormal airflow noise caused by the oil-gas mixture. The hydraulic oil in the hydraulic oil chamber can eliminate the abnormal noise generated in the sealing part due to the insufficient lubrication performance of the synthetic oil. The synthetic oil in the synthetic oil chamber overcomes the problem that the conventional damper has too much damping in an ultra-low temperature environment, resulting in too slow switching or even failure to switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] In the figure:

[0014] 1. Cylinder body; 101. Hydraulic oil chamber; 102. Synthetic oil chamber; 1021. Rod chamber; 1022. Rodless chamber; 1023. First inner side wall; 1024. Second inner side wall; 103. Air chamber;

[0015] 2. Front isolation piston;

[0016] 3. Rear isolation piston;

[0017] 4. Damping piston; 401. First outer side wall; 402. Second outer side wall;

[0018] 5. Piston rod;

[0019] 6. Damping groove;

[0020] 7. Guide sleeve;

[0021] 8. Seals;

[0022] 9. Front connector;

[0023] 10. Rear connector. DETAILED DESCRIPTION

[0024] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter for which protection is sought is limited only by the attached claims and their equivalents.

[0025] Embodiment 1:

[0026] like Figure 1 As shown, a double-isolation structure low-temperature resistant and abnormal noise damper comprises a cylinder body 1 having an inner cavity, a front isolation piston 2 is provided at the front end of the inner cavity, and a rear isolation piston 3 is provided at the rear end, and the front isolation piston 2 and the rear isolation piston 3 divide the inner cavity into three independent chambers which are not connected to each other, namely, a hydraulic oil chamber 101, a synthetic oil chamber 102 and an air chamber 103 from front to back;

[0027] The independent air chamber 103 formed by the rear isolation piston 3 ensures the oil-gas separation structure of the damper, and eliminates the abnormal airflow sound caused by oil-gas mixing;

[0028] The synthetic oil chamber 102 is filled with synthetic oil. The synthetic oil can ensure that the damping effect of the damper in an ultra-low temperature environment of -40°C is very close to that in a normal temperature environment of 20°C, thereby overcoming the problem that the conventional damper has too much damping in an ultra-low temperature environment, resulting in too slow switching or even failure to switch. A damping piston 4 is slidably arranged in the synthetic oil chamber 102, a piston rod 5 is fixed to one side of the damping piston 4, and the damping piston 4 divides the synthetic oil chamber 102 into a rod chamber 1021 and a rodless chamber 1022, and the outer peripheral wall of the damping piston 4 is partially fitted with the cavity wall of the synthetic oil chamber 102 to connect the rod chamber 1021 with the rodless chamber 1022.

[0029] The hydraulic oil chamber 101 formed by the front isolation piston 2 is filled with hydraulic oil, which can ensure effective lubrication of the sealing part and prevent abnormal noise generated in the sealing part due to insufficient lubrication performance of synthetic oil.

[0030] In some examples, the axial cross-section of the damping piston 4 includes a first outer side wall 401 and a second outer side wall 402 that are relatively arranged, and the axial cross-section of the synthetic oil chamber 102 includes a first inner side wall 1023 and a second inner side wall 1024 that are relatively arranged, the first outer side wall 401 is in contact with the first inner side wall 1023, and a gap is left between the second outer side wall 402 and the second inner side wall 1024 to form a damping groove 6 for the circulation of synthetic oil, the damping piston 4 and the synthetic oil chamber 102 are not coaxially arranged, but the damping piston 4 and the hydraulic oil chamber 101 and the air chamber 103 are coaxially arranged, and during the reciprocating motion of the damping piston 4 along its axis, the first outer side wall 401 and the first inner side wall 1023 that are always in contact with each other can guide the movement of the damping piston 4 to prevent it from tilting.

[0031] In some examples, the height h of the damping groove 6 gradually increases from the front to the back and then remains unchanged. Damping grooves 6 of different heights can allow synthetic oils of different flow rates to flow through, thereby achieving different damping effect requirements.

[0032] In some examples, the air cavity 103 is filled with nitrogen.

[0033] In some examples, a guide sleeve 7 is provided at the front end of the inner cavity and a seal 8 is provided between the guide sleeve 7 and the front isolation piston 2 , and hydraulic oil is filled between the seal 8 and the front isolation piston 2 to form the hydraulic oil chamber 101 .

[0034] In some examples, the piston rod 5 extends forward from the cylinder body 1 and is connected to a front joint 9, which is connected to an external movable part to form a movable end. The rear end of the cylinder body 1 is connected to a rear joint 10, which is used for the installation of the damper to form a fixed end.

[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double-isolation structure low-temperature resistant and abnormal noise damper, characterized in that: The invention comprises a cylinder body (1) having an inner cavity, wherein a front isolating piston (2) is provided at the front end of the inner cavity, and a rear isolating piston (3) is provided at the rear end, wherein the front isolating piston (2) and the rear isolating piston (3) divide the inner cavity into a hydraulic oil cavity (101), a synthetic oil cavity (102) and an air cavity (103), wherein the synthetic oil cavity (102) is filled with synthetic oil, and a damping piston (4) is slidably arranged in the synthetic oil cavity (102), wherein a piston rod (5) is fixed to one side of the damping piston (4), and the damping piston (4) divides the synthetic oil cavity (102) into a rod cavity (1021) and a rodless cavity (1022), and wherein the outer peripheral wall of the damping piston (4) is partially in contact with the cavity wall of the synthetic oil cavity (102) so that the rod cavity (1021) and the rodless cavity (1022) are connected.

2. The double-isolation structure low-temperature resistant and abnormal noise-proof damper according to claim 1 is characterized in that: The axial cross-section of the damping piston (4) includes a first outer side wall (401) and a second outer side wall (402) that are arranged opposite to each other, and the axial cross-section of the synthetic oil chamber (102) includes a first inner side wall (1023) and a second inner side wall (1024) that are arranged opposite to each other, the first outer side wall (401) and the first inner side wall (1023) are in close contact with each other, and a gap is left between the second outer side wall (402) and the second inner side wall (1024) to form a damping groove (6) for the synthetic oil to flow through.

3. The double-isolation structure low-temperature resistant and abnormal noise-proof damper according to claim 2 is characterized in that: The height h of the damping groove (6) gradually increases from the front to the back and then remains unchanged.

4. The double-isolation structure low-temperature resistant and abnormal noise-proof damper according to claim 1 is characterized in that: The air cavity (103) is filled with nitrogen.

5. The double-isolation structure low-temperature resistant and abnormal noise-proof damper according to claim 1 is characterized in that: A guide sleeve (7) is provided at the front end of the inner cavity, and a seal (8) is provided between the guide sleeve (7) and the front isolation piston (2). Hydraulic oil is filled between the seal (8) and the front isolation piston (2) to form the above-mentioned hydraulic oil chamber (101).

6. The double-isolation structure low-temperature resistant and abnormal noise-proof damper according to claim 1 is characterized in that: The piston rod (5) extends forward from the cylinder body (1) and is connected to a front joint (9), and the rear end of the cylinder body (1) is connected to a rear joint (10).

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