Vehicle door opening and closing assist device

Abstract

This invention provides a vehicle door opening and closing auxiliary device, comprising: a gas lifter, an inner housing, and an outer housing. The gas lifter includes a cylinder and a cylinder rod. The cylinder is filled with a compressible material. The cylinder rod is inserted into the cylinder to slide relative to the cylinder by compression or expansion of the compressible material. The inner housing extends along the direction of the cylinder rod, with one end connected to one end of the cylinder rod to slide together with the cylinder rod. Its inner circumferential surface contacts the cylinder while surrounding the gas lifter from the outside. The outer housing extends along the direction of the cylinder and has a first end and a second end. The first end is connected to one end of the cylinder, and the inner housing is inserted through the second end. The outer housing surrounds part or all of the inner housing.

Description

Technical Field

[0001] This invention relates to an auxiliary device for opening and closing vehicle doors. Background Technology

[0002] The statements in this section are provided only as background information in relation to this application and do not constitute prior art.

[0003] In typical passenger vehicles, the hood covering the engine compartment and the trunk lid covering the luggage compartment are rotatably mounted on the vehicle body to be opened and closed.

[0004] The opening and closing mechanism of the hood and trunk lid is configured to have rotational restraint when the latches mounted at the ends of the hood or trunk lid are locked to the strike pins mounted on the vehicle body, and to be lifted when the latches and strike pins are unlocked.

[0005] At this point, the pop-out device can be additionally connected to the hood and trunk lid, so that the trunk lid can be automatically raised to a predetermined height or the maximum opening height when unlocked.

[0006] Gas lifters, which utilize gas pressure, are widely used as ejection devices. One end of the gas lifter is connected to the trunk lid or hood, while the other end is rotatably connected to the vehicle body, allowing it to be mounted to compress or extend longitudinally. Therefore, when the hood or trunk lid is closed, the internal gas is compressed; when the locking mechanism of the hood or trunk lid is released, the gas lifter is mounted to lift the hood or trunk lid by the extension caused by the expansion of the gas.

[0007] In addition, the pop-out device uses a power lifter device with a motor and linkage structure to open the trunk lid, and this power lifter device has a high manufacturing cost, so it is only used in luxury vehicles.

[0008] Traditional gas lifters are formed in a housing that uses a spring to surround and cover the outer surface of the gas lifter, and is configured to open the trunk lid using the pressure of the gas lifter and the elasticity of the spring.

[0009] However, when the power lift device is used in cheaper models (e.g., low-priced or mid-priced models), the power lift is combined with the gas lift, thus eliminating the need for the springs of a traditional gas lift. When the springs are removed, a separation space is created between the gas lift and the housing. Summary of the Invention

[0010] This application proposes to eliminate the springs included in conventional vehicle door opening and closing aids, and instead apply a power lifter and form ribs on the inner surface of the inner housing to manufacture in the same shape as conventional vehicle door opening and closing aids, thereby improving the appearance and reducing manufacturing costs.

[0011] In one embodiment of the invention, a vehicle door opening and closing assist device includes: a gas lifter comprising a cylinder and a cylinder rod, the cylinder extending along the longitudinal direction of the gas lifter and filled therein with a compressible material, the cylinder rod extending along a longitudinal direction parallel to the cylinder, inserted into the cylinder, and sliding relative to the cylinder by compression or expansion of the compressible material; an inner housing extending along the direction of the cylinder rod, one end of which is connected to one end of the cylinder rod to slide together with it according to the sliding of the cylinder rod, and a portion of its inner circumferential surface contacting the cylinder while the inner housing surrounds the gas lifter from the outside; and an outer housing extending along the direction of the cylinder, one end of which is connected to one end of the cylinder, the inner housing being inserted through the other end of the outer housing, and the outer housing surrounding part or all of the inner housing.

[0012] The inner housing includes a plurality of ribs that protrude inward from the inner peripheral surface of the inner housing and the ribs contact a portion of the outer peripheral surface of the cylinder.

[0013] The plurality of ribs are arranged to be spaced apart from each other at regular intervals in the circumferential direction of the inner housing.

[0014] The rib is in surface contact with a portion of the outer peripheral surface of the cylinder.

[0015] A first inclined portion is formed on one end of the inner housing, and the first inclined portion is configured to have an outer diameter that gradually decreases as it extends longitudinally.

[0016] A second inclined portion is formed on the other end of the outer housing. The second inclined portion is inclined to have an inner diameter that gradually decreases with longitudinal extension to correspond to the first inclined portion. When the other end of the cylinder rod is located at a position corresponding to the one end of the cylinder, the outer peripheral surface of the first inclined portion and the inner peripheral surface of the second inclined portion are in surface contact with each other.

[0017] The entire inner circumferential surface of the inner housing is in surface contact with the outer circumferential surface of the cylinder on the first inclined portion.

[0018] The inner housing includes a rib that protrudes inward from the inner peripheral surface of the inner housing to contact a portion of the outer peripheral surface of the cylinder, and the rib has a gradually shortening length that extends from the first inclined portion and protrudes outward.

[0019] A flange extending in the radial direction is formed on one end of the cylinder that is exposed to the outside of the outer housing.

[0020] According to this application, the vehicle door opening and closing auxiliary device can form ribs on the inner circumferential surface of the inner housing to support the space between the inner housing and the gas lifter, replacing the position of the spring in the conventional vehicle door opening and closing auxiliary device.

[0021] In addition, multiple ribs can be formed to be spaced apart from each other at regular intervals along the circumference of the inner shell, thereby reducing external impact and protecting the gas lifter.

[0022] In addition, when the vehicle door is closed, the first inclined portion formed at one end of the inner shell and the second inclined portion formed at the other end of the outer tube can come into face contact with each other, thereby securing them firmly.

[0023] Other application areas will become apparent from the description provided herein. It should be understood that the specification and specific embodiments are intended for illustrative purposes only and not to limit the scope of this application. Attached Figure Description

[0024] To better understand this application, various embodiments thereof will now be described with reference to the accompanying drawings by way of example, wherein:

[0025] Figure 1 It is a perspective view showing the vehicle's door opening and closing auxiliary device;

[0026] Figure 2 This is a side view showing the gas lift of the door opening and closing auxiliary device in the open state;

[0027] Figure 3 This is a side view showing the gas lift of the door opening and closing assist device in the closed state;

[0028] Figure 4 It is along Figure 2 A cross-sectional view taken from line AA in the diagram;

[0029] Figure 5 In a first exemplary embodiment of the internal housing of the door opening and closing assist device, along Figure 3 A cross-sectional view taken from line BB in the middle;

[0030] Figure 6In a second exemplary embodiment along the inner housing of the door opening and closing assist device Figure 3 The cross-sectional view taken from line BB in the middle; and

[0031] Figure 7 It is along Figure 3 The cross-sectional view taken from line CC in the diagram.

[0032] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this application in any way. Detailed Implementation

[0033] The following description is exemplary in nature only and is not intended to limit this application, its application, or its use. It should be understood that throughout the drawings, corresponding reference numerals denote the same or corresponding parts and features.

[0034] The specific structure of the functional description of the exemplary embodiments of this application is shown only for the purpose of describing exemplary embodiments according to this application, and the exemplary embodiments may be embodied in various embodiments and should not be construed as limiting this application to the exemplary embodiments described in this specification or application.

[0035] Since various modifications and embodiments can be made based on the exemplary embodiments of this application, specific exemplary embodiments will be shown in the accompanying drawings and described in detail in this specification or application. However, it should be understood that this application includes all modifications, equivalents, and alternatives included within the spirit and scope of this application.

[0036] For example, the first and / or second expressions can be used to describe various components, and these components are not limited by the expressions. These expressions are only used for the purpose of distinguishing one component from another; for example, without departing from the scope of the concepts according to this application, the first component can be referred to as the second component, and similarly, the second component can also be referred to as the first component.

[0037] When a component is described as "connected" or "linked" to another component, that component can be directly connected to or linked to the other component; however, it should be understood that other components may exist between these components. Conversely, when a component is described as "directly connected" or "directly linked" to another component, it should be understood that there are no other components between these components. Other expressions describing relationships between components, namely "between" and "directly between," or "adjacent" and "directly adjacent," should be interpreted in the same way.

[0038] The terminology used herein is for the purpose of describing exemplary embodiments only and is not intended to limit this application. Unless the phrase clearly indicates the opposite, the singular form used herein may include the plural form. In this application, it will be understood that the terms "comprising," "having," etc., specifying the presence of features, integers, steps, operations, components, parts, or combinations thereof described in the specification do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0039] Unless otherwise defined, all terms used herein (including technical or scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Furthermore, terms used in their general definitions are to be interpreted as having the meaning consistent with relevant technical documents and current disclosures, and are not to be interpreted in an ideal or highly formal sense unless defined otherwise.

[0040] Exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in each drawing denote the same components.

[0041] Figure 1 This is a perspective view illustrating a vehicle door opening and closing auxiliary device according to an exemplary embodiment of the present invention. Figure 2 This is a side view showing the gas lifter of the door opening and closing auxiliary device according to an exemplary embodiment of the present invention in the open state. Figure 3 This is a side view showing the gas lift of the door opening and closing auxiliary device in the closed state according to another embodiment of the present invention. Figure 4 It is along Figure 2 The cross-sectional view taken from line AA in the diagram. Figure 5 In a first exemplary embodiment of the door opening and closing auxiliary device according to an exemplary embodiment of the present invention, along the inner housing of the device... Figure 3 The cross-sectional view taken from line BB in the diagram. Figure 6 In a second exemplary embodiment of the door opening and closing assist device according to an exemplary embodiment of the present invention, along the inner housing of the door opening and closing assist device Figure 3 The cross-sectional view taken from line BB in the diagram. Figure 7 It is along Figure 3 The cross-sectional view taken from line CC in the diagram.

[0042] Reference Figures 1 to 7 An exemplary embodiment of a vehicle door opening and closing auxiliary device according to this application is described.

[0043] In one embodiment of the present invention, a vehicle door opening and closing auxiliary device may be connected between the vehicle body and the hood, or between the vehicle body and the tailgate, to assist in opening or closing the hood at the front of the vehicle or the tailgate at the rear of the vehicle.

[0044] Door opening and closing assist devices use hydraulic pressure to assist in opening the door and prevent the door from closing too quickly, thus preventing injury to passengers when the door is closed. In vehicle door opening and closing assist devices, hydraulic pressure is generated by a compressible material such as gas or oil.

[0045] A power lifter can be installed on a vehicle to assist in the electric opening and closing of the doors using an electric motor.

[0046] In one embodiment, the door opening and closing auxiliary device includes: a gas lifter 100, an inner housing 200, and an outer housing 300. The gas lifter 100 includes a cylinder 110 and a cylinder rod 120. The cylinder 110 extends along the longitudinal direction of the gas lifter and is filled therein with compressible material. The cylinder rod 120 extends along the longitudinal direction of the gas lifter 100, is inserted into the cylinder 110, and slides relative to the cylinder 110 by compression or expansion of the compressible material. The inner housing 200 extends along the direction of extension of the cylinder rod 120, with one end connected to one end of the cylinder rod 120 to slide together with it according to the sliding of the cylinder rod 120. A portion of the inner circumferential surface of the inner housing contacts the cylinder 110 while surrounding the gas lifter 100 from the outside. The outer housing 300 extends along the direction of extension of the cylinder 110 and surrounds part or all of the inner housing 200. The outer housing includes: a first end and a second end. The first end is connected to one end of the cylinder 110, and the inner housing 200 is inserted through the second end.

[0047] Further reference Figure 1 The gas lifter 100 may include a cylinder 110 and a cylinder rod 120. The cylinder 110 extends in the longitudinal direction and is filled with a compressible material therein. The cylinder rod 120 slides by the compression or expansion of the compressible material.

[0048] When the gas lifter 100 opens the vehicle door, the compressible material expands, causing the cylinder rod 120 to slide, thereby assisting in opening the vehicle door. Additionally, when the power lifter uses an electric motor to open the vehicle door, the gas lifter 100 can assist the power lifter in opening the door.

[0049] In addition, when the gas lifter 100 closes the vehicle door, the compressible material can be compressed to cause the cylinder rod 120 to slide, thereby assisting in closing the vehicle door. The gas lifter 100 can also assist in closing the door quickly, thereby reducing the possibility of passenger injury when closing the vehicle door.

[0050] The inner housing 200 extends along the direction of the gas lifter 100 and one end of it is connected to one end of the cylinder rod 120, so that the cylinder rod 120 can slide as a whole when sliding. A portion of the inner peripheral surface of the inner housing 200 can contact and be supported by the outer peripheral surface of the cylinder 110, and the inner housing 200 can cover the gas lifter 100.

[0051] The outer housing 300 extends along the direction of the gas lifter 100, with one end connected to one end of the cylinder 110, and is formed to surround the inner housing 200. When the other end of the cylinder rod 120 is in a position corresponding to one end of the cylinder 110, the outer housing 300 surrounds the inner housing 200 and can cover the cylinder 110 exposed when the compressible material of the gas lifter 100 expands and the cylinder rod 120 and the inner housing 200 slide.

[0052] Therefore, the gas lifter 100 can be protected from external impacts and vibrations, the outer diameter dimensions of the inner housing 200 and the outer housing 300 can be set, and the gas lifter 100 can be formed to have the same outer diameter as the power lifter when installed as an auxiliary power lifter, thereby improving the appearance.

[0053] The inner housing 200 includes a rib 210 that protrudes inward from an inner peripheral surface to contact a portion of the outer peripheral surface of the cylinder 110.

[0054] An inwardly protruding rib 210 is formed on the inner peripheral surface of the inner housing 200, and the rib 210 can contact the cylinder 110.

[0055] In conventional vehicle door opening and closing assist devices, a spring is inserted between the inner housing 200 and the gas lifter 100 to utilize the spring force to assist the pressure of the vehicle door opening and closing assist device. However, according to the present invention, the vehicle door opening and closing assist device is equipped with a power lifter and is used to assist the power lifter. The spring force is not required, so the spring is removed, and the space where the spring was inserted becomes an empty space.

[0056] At this time, in order to support the gas lifter 100 in the empty space, the rib 210 can be formed in the inner housing 200 to support the movement of the gas lifter 100 and to disperse external impacts, thereby protecting the gas lifter 100 from damage.

[0057] Multiple ribs 210 are formed to be spaced apart from each other at regular intervals in the circumferential direction of the inner shell 200.

[0058] Multiple ribs 210 can protrude inward from the inner circumferential surface of the inner housing 200 and are arranged at regular intervals in the circumferential direction of the inner housing 200, thereby uniformly supporting the gas lifter 100. In addition, they can uniformly disperse external impacts, thereby protecting the gas lifter 100.

[0059] In addition, since the ribs 210 are formed to be spaced apart from each other at regular intervals when manufacturing the inner shell 200, extrusion molding is convenient.

[0060] In addition, when manufacturing the inner housing 200, the ribs 210 can be formed to be spaced apart from each other at regular intervals, thereby protecting the entire gas lifter 100 from impacts transmitted from all directions from the outer peripheral surface of the gas lifter 100.

[0061] In addition, since the size of the inner housing 200 can be set constantly, it is advantageous in terms of size setting. Therefore, the inner housing 200 can be applied to various vehicle models, thereby reducing manufacturing costs.

[0062] The rib 210 is in surface contact with a portion of the outer peripheral surface of the cylinder 110.

[0063] The end of the rib 210 protruding from the inner peripheral surface of the inner housing 200 toward the center of the inner housing 200 can be formed as part of the outer peripheral surface of the cylinder 110, such that the end of the rib 210 can be in surface contact with a part of the outer peripheral surface of the cylinder 110.

[0064] Therefore, the rib 210 can more firmly support the cylinder 110, and when the cylinder rod 120 and the inner housing 200 are connected, the rib 210 of the inner housing 200 can contact a portion of the outer peripheral surface of the cylinder 110, thereby protecting the cylinder 110 from shaking when the cylinder rod 120 slides.

[0065] The first inclined portion 220 is formed on the end of the inner housing 200, and the first inclined portion 220 is configured to gradually decrease in outer diameter while extending along the longitudinal direction of the inner housing.

[0066] Further reference Figure 7 The first inclined portion 220 is formed to extend along the longitudinal direction at one end of the inner housing 200 and is formed to be inclined so that the outer diameter gradually decreases along the extension direction.

[0067] Therefore, when the vehicle door is closed, the other end of the cylinder rod 120 is located at a position corresponding to one end of the cylinder 110, and at this time, the outer peripheral surface of the first inclined portion 220 can contact the inner peripheral surface of the outer housing 300 and be fixed to the inner peripheral surface of the outer housing 300.

[0068] The second inclined portion 310 is formed on the other end of the outer housing 300, and the second inclined portion is configured to gradually decrease in inner diameter while extending longitudinally to correspond to the first inclined portion 220. When the other end of the cylinder rod 120 is located at a position corresponding to one end of the cylinder 110, the outer peripheral surface of the first inclined portion 220 and the inner peripheral surface of the second inclined portion 310 are in surface contact with each other.

[0069] Further reference Figure 7 The second inclined portion 310 is formed to extend longitudinally from the interior of the other end of the outer housing 300 and is formed to be inclined so that the inner diameter gradually decreases. At this time, the second inclined portion 310 is formed to correspond to the inclined shape of the first inclined portion 220. When the vehicle door is closed and the other end of the cylinder rod 120 is in a position corresponding to one end of the cylinder 110, the outer peripheral surface of the first inclined portion 220 and the inner peripheral surface of the second inclined portion 310 can contact each other.

[0070] As a result, the inner housing 200 and the outer housing 300 can be firmly fixed, and even vibrations during vehicle operation can reduce noise caused by friction between the inner housing 200 and the outer housing 300.

[0071] The entire inner circumferential surface of the inner housing 200 is in surface contact with the outer circumferential surface of the cylinder 110 on the first inclined portion 220.

[0072] Further reference Figure 5 In a first exemplary embodiment of the first inclined portion 220, the inner peripheral surface of the first inclined portion 220 is formed to correspond to the outer peripheral surface of the cylinder 110, and the inner peripheral surface of the first inclined portion 220 can contact the outer peripheral surface of the cylinder 110.

[0073] As a result, the inner peripheral surface of the first inclined portion 220 formed at one end of the inner housing 200 can contact the outer peripheral surface of the cylinder 110, thereby further improving the connection force between the cylinder 110 and the inner housing 200.

[0074] The inner housing 200 includes a rib 210 that protrudes inward from its inner peripheral surface to contact a portion of the outer peripheral surface of the cylinder 110, and the rib 210 has a gradually shortening length that extends outward from the first inclined portion 220.

[0075] Further reference Figure 6In a second exemplary embodiment of the first inclined portion 220, the rib 210 formed on the inner peripheral surface of the inner housing 200 is formed to extend to the inner peripheral surface of the first inclined portion 220, and the rib 210 formed on the inner peripheral surface of the first inclined portion 220 can contact the outer peripheral surface of the cylinder 110.

[0076] As a result, the inner housing 200 can be manufactured with a uniform thickness to reduce the defect rate during manufacturing and to improve the rigidity of the inner housing 200.

[0077] A flange 111 extending in the radial direction is formed at one end of the cylinder 110 that is exposed to the outside of the outer housing 300 through the outer housing 300.

[0078] A flange portion 111 extending in the radial direction is formed at one end of the outer housing 300. The other end of the outer housing 300 can be connected to the side of the flange portion 111 extending from the outer peripheral surface of the cylinder 110. The connecting portion 130 can be connected to the side of the flange portion 111 extending from the inner peripheral surface of the cylinder 110.

[0079] As a result, the connection force between the cylinder 110, the outer housing 300, and the connecting part 130 can be increased.

[0080] Although specific exemplary embodiments of this application have been illustrated and described, it will be apparent to those skilled in the art that various modifications and changes can be made to this application without departing from the technical spirit of this application.

Claims

1.A door opening and closing assist device of a vehicle, comprising: a gas booster including: a cylinder configured to: extend along a longitudinal direction of the gas booster, and be filled with a compressible material therein; and a cylinder rod configured to: extend along the longitudinal direction of the gas booster, be inserted into the cylinder, and slide with respect to the cylinder by compression or expansion of the compressible material of the cylinder; an inner housing configured to: extend along the longitudinal direction, be coupled to one end of the cylinder rod to slide together according to the sliding of the cylinder rod, and have an inner circumferential surface in contact with the cylinder while surrounding the gas booster; and an outer housing configured to: extend along the longitudinal direction, surround the inner housing, and include a first end coupled to one end of the cylinder and a second end through which the inner housing is inserted, wherein a first inclined portion is formed on an end portion of the inner housing, the first inclined portion being configured to have an outer diameter gradually decreasing as it extends longitudinally, wherein a second inclined portion is formed on an end portion of the outer housing, the second inclined portion being configured to have an inner diameter gradually decreasing as it extends longitudinally to correspond to the inclined shape of the first inclined portion, an outer circumferential surface of the first inclined portion being in surface contact with an inner circumferential surface of the second inclined portion when an end portion of the cylinder rod is located at a position corresponding to the one end of the cylinder. 2.The door opening and closing assist device of a vehicle according to claim 1, wherein the inner housing including: a plurality of rib portions protruding inward from an inner circumferential surface of the inner housing, the plurality of rib portions being in contact with an outer circumferential surface of the cylinder. 3.The door opening and closing assist device of a vehicle according to claim 2, wherein the plurality of rib portions being arranged to be spaced apart from each other at regular intervals in a circumferential direction of the inner housing. 4.The door opening and closing assist device of a vehicle according to claim 2, wherein the plurality of rib portions being in surface contact with a portion of the outer circumferential surface of the cylinder. 5.The door opening and closing assist device of a vehicle according to claim 1, wherein, an entire inner circumferential surface of the inner housing being in surface contact with the outer circumferential surface of the cylinder on the first inclined portion. 6.The door opening and closing assist device of a vehicle according to claim 1, wherein the inner housing including: a rib portion configured to protrude inward from an inner circumferential surface of the inner housing and be in contact with a portion of the outer circumferential surface of the cylinder, the rib portion having a gradually shortened length extending from the first inclined portion and protruding outward. 7.The door opening and closing assist device of a vehicle according to claim 1, wherein, a flange portion extending along a radial direction being formed on one end of the cylinder exposed to the outside of the outer housing by the outer housing.

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