gas lifter for a tailgate of a vehicle

专利摘要:
PURPOSE: A gas lifter for a tailgate is provided to open the tailgate quietly and smoothly at high temperature or the low temperature by installing a left gas lifter having the small sectional area of the piston orifice and the small amount of oil and a right gas lifter having the large sectional area of the piston orifice and the large amount of oil. CONSTITUTION: A left gas lifter and a right gas lifter are installed between a tailgate and a vehicle body. The sectional area of an orifice(11) of a piston is decreased in the left gas lifter, and the small amount of oil is charged in the left gas lifter. The sectional area of the orifice of the piston is increased in the right gas lifter, and the large amount of oil is charged in the right gas lifter. The tailgate is opened smoothly and stably with different damping of the left and right gas lifters. A piston ring(9) is perfectly round without a slit and contacted to the piston to regulate flow of oil accurately. The orifice sectional area of the right gas lifter is two times as large as the orifice sectional area of the left gas lifter, and the oil amount of the right gas lifter is 1.5 times more than the oil amount of the left gas lifter.
公开号:KR20040033444A
申请号:KR1020020062539
申请日:2002-10-14
公开日:2004-04-28
发明作者:한영일
申请人:현대자동차주식회사；
IPC主号:

专利说明:

Gas lifter for a tailgate of a vehicle}
[13] The present invention relates to a gas lift used to open and close a tailgate of a vehicle, and more particularly, to a technique for opening a tailgate to a more stable behavior.
[14] In general, the gas lifter is formed as shown in FIG. 1, and the rod 104 is stretched and contracted by a piston 102 that is perturbed inside the cylinder 100, and the movement distance of the piston 102 is increased. A stopper 106 or the like is provided to limit the pressure, and the inside of the cylinder 100 is filled with nitrogen gas and the like, and a certain amount of oil is sealed together to perform an oil damping action.
[15] An orifice 108 is formed in the piston 102 and a piston ring 112 as shown in FIG. 2 is sandwiched between the plate 110 and the piston ring 112. It is a structure in which the part 114 is formed.
[16] The operation of the gas lifter as described above will be described with reference to FIG. 3. When the rod 104 is extended, an orifice in which the piston 102 moves rapidly due to the pressure of the gas charged therein is formed in the piston 102. When passing through the 108, a damping force is generated and is converted into a quiet operation. When the rod 104 contracts, a bypass passage 116 is formed by the movement of the piston ring 112 so that the oil resists. Is returned without
[17] Conventionally, the gas lifter as described above is installed and used on both sides of the tailgate, but in the tailgate equipped with the gas lifter in such a state, the tailgate is not opened quietly at room temperature and high temperature. There is a problem in that a phenomenon occurs that is rapidly operated as if hitting the roof of the vehicle.
[18] This is because the oil damping capacity of the gas lifter is constant as compared with the increase in the momentum of the tailgate as the pressure of the gas filled in the gas lifter increases with the temperature change.
[19] Of course, increasing the oil damping capacity of the gas lifter can prevent the sudden movement of the tailgate at high temperature conditions as described above, but on the contrary, the tailgate is not opened well at low temperature conditions such as winter. There is a problem such as poor operation.
[20] Accordingly, the present invention has been made to solve the problems described above, so that the smooth and quiet opening of the tailgate can be made even under high temperature operating conditions and smoothly open operation of the tailgate even in a low temperature operating environment. It is an object of the present invention to provide a gas lifter for a tailgate to be achieved.
[1] 1 is a view showing the structure of a general gas lifter,
[2] 2 is a view showing a piston ring used in a conventional gas lifter,
[3] 3 is a view for explaining the operation of a general gas lifter,
[4] 4 is a view illustrating main parts of gas lifters according to the present invention;
[5] 5 is a view showing a piston ring used in the gas lifters of FIG.
[6] 6 is a view illustrating a state in which gas lifters are installed according to the present invention;
[7] 7 is an explanatory view comparing the operation of the gas lifter according to the prior art and the gas lifter according to the present invention;
[8] 8 is a graph comparing the damping characteristics of the tailgate according to the prior art and the damping characteristics of the tailgate according to the present invention.
[9] <Brief description of symbols for the main parts of the drawings>
[10] One; Tailgate 3; Body
[11] 5; Left gas lifter 7; Right gas lifter
[12] 9; Piston ring 11; Orifice
[21] The gas lifter for tailgate of the present invention for achieving the above object is characterized in that the gas lifter having different orifice cross-sectional areas of the piston and the amount of oil filled in the cylinder is installed together in the tailgate.
[22] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
[23] 4 and 5 are views illustrating main parts of gas lifters according to the present invention, and FIG. 6 is a view illustrating a state in which gas lifters according to the present invention are installed.
[24] That is, in the present invention, as shown in FIG. 6 between the tailgate 1 and the vehicle body 3, the orifice cross-sectional area of the piston and the orifice cross-section of the left gas lift 5 and the piston which is small in the amount of oil filled are large. By installing the right gas lift 7 with a large amount of filled oil at the same time, the different oil damping functions provided by the two gas lifts 5 and 7 ensure more stable and reliable operation of the tailgate 1. It is.
[25] 4 shows the pistons of the left gas lift 5 and the right gas lift 7 in contrast with each other. The piston shown in the upper portion of the orifice 11 is formed in close contact with the piston. The cross-sectional area is formed smaller than the lower one.
[26] Meanwhile, FIG. 5 shows a piston ring 9 used for the left and right gas lifters 5 and 7, which is formed in a completely circular shape without a slit part as compared with a conventional piston ring. The difference is that.
[27] As described above, the fully circular piston ring 9 without the slit portion has an advantage of more precisely controlling the flow of oil in forming the orifice 11.
[28] The right gas lift 7 has an orifice cross section greater than twice as large as the left gas lift 5 and the amount of oil filled in the cylinder 13 is 1.5 times or more. Thus, the orifice cross sections of the two gas lifts If the oil amount is different, a three-stage damping mechanism is formed when the tailgate 1 is opened.
[29] That is, in the first stage, the gas passes through the orifices 11 in both the left and right gas lifters 5 and 7, and the tailgate 1 is opened quickly. In the second stage, the orifice cross section is large and the oil amount is increased. In many right gas lifters 7, primary oil damping function is still performed in the left gas lifter 5, where the gas still passes through the orifice, while oil passes through the orifice and starts oil damping. In the gas lifter 5, the oil begins to damp the oil while passing through the smaller orifice, and the secondary oil damping is performed in which the oil damping is performed in both the left and right gas lifters 5 and 7.
[30] The two-step oil damping as described above allows the oil damping section to be shorter than in the related art as shown in FIG. 7, but more stably open the tailgate 1.
[31] Conventionally, the tailgate opening speed is controlled in a non-oil damping section in which oil damping is not performed as shown in FIG. If the speed difference between the tailgate opening speed in the oil damping section due to oil damping is large, an impact occurs. To prevent this, the speed of the oil damping section should be relatively large. Since the gate opening speed is large, there is a problem that an impact occurs when the opening is completed. On the contrary, when the speed of the oil damping section is reduced, the shock at the completion of opening is resolved, but the impact at the time of switching from the non oil damping section to the oil damping section is There is a growing problem.
[32] In contrast, the two-stage oil damping according to the present invention can reduce the speed difference between the transition time from the non-oil damping section to the oil damping section and the completion of the tailgate opening from the oil damping section in two steps. In the shorter section, the primary oil damping reduces the momentum of the tailgate to some extent, and in the second oil damping, the tailgate's momentum is rapidly attenuated for a shorter section with a stronger oil damping capability than the conventional gas lift. It is to stabilize the behavior of.
[33] Of course, in order to exhibit a strong oil damping capability as described above, a complete circular piston ring 9 capable of precise oil amount control as described above should be used.
[34] In addition, as described above, when the oil damping section is shortened, the tailgate is easily opened to a relatively large angle even at low temperature, thereby facilitating the operability of the tailgate.
[35] As described above, according to the present invention, by using a gas lift with a different orifice cross-sectional area of the piston and the amount of oil filled in the tailgate, the tailgate can be smoothly and quietly opened even under high temperature operating conditions. In addition, the open operation of the tailgate can be made smoothly even in a low temperature operating environment.

权利要求:
Claims (3)
[1" claim-type="Currently amended] A gas lifter for a tailgate, wherein a gas lifter having a different orifice cross-sectional area of the piston and a quantity of oil filled in the cylinder is installed together in the tailgate.
[2" claim-type="Currently amended] The method of claim 1,
One gas lift is a gas lifter for a tailgate, characterized in that the orifice cross-sectional area is more than twice as large as the other gas lift and the amount of oil filled in the cylinder is 1.5 times or more.
[3" claim-type="Currently amended] The method of claim 1,
The piston ring used in the gas lifter is a tailgate gas lifter, characterized in that formed in a complete circle without a slit.

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同族专利:

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公开号 | 公开日

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KR100461422B1|2004-12-10|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-10-14|Application filed by 현대자동차주식회사

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2002-10-14|Priority to KR10-2002-0062539A

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2004-04-28|Publication of KR20040033444A

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2004-12-10|Application granted

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2004-12-10|Publication of KR100461422B1

优先权:

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申请号 | 申请日 | 专利标题

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KR10-2002-0062539A|KR100461422B1|2002-10-14|2002-10-14|gas lifter for a tailgate of a vehicle|