KR101666679B1 - A gas spring - Google Patents

A gas spring Download PDF

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Publication number
KR101666679B1
KR101666679B1 KR1020150090067A KR20150090067A KR101666679B1 KR 101666679 B1 KR101666679 B1 KR 101666679B1 KR 1020150090067 A KR1020150090067 A KR 1020150090067A KR 20150090067 A KR20150090067 A KR 20150090067A KR 101666679 B1 KR101666679 B1 KR 101666679B1
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KR
South Korea
Prior art keywords
rod
driving
gear
state
gear portion
Prior art date
Application number
KR1020150090067A
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Korean (ko)
Inventor
이지홍
Original Assignee
주식회사 한일정밀
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Priority to KR1020150090067A priority Critical patent/KR101666679B1/en
Application granted granted Critical
Publication of KR101666679B1 publication Critical patent/KR101666679B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction

Abstract

A gas spring device is disclosed.
The gas spring device includes a gas spring main body having a housing and a piston rod, a first connection support portion arranged to surround the housing of the gas spring main body, and a second connection support portion sandwiched between the first connection support portion and the piston rod A driving rod having a first gear portion connected to the piston rod in a state of being coaxial with the piston rod at an inner side of the second connection supporting portion, And a second gear portion corresponding to the first gear portion of the driving rod, and the second gear portion corresponding to the gear engaging force of the gear portions, And a rod driving unit configured to drive the driving rod in the operating direction of the piston rod.

Description

Gas Spring Device {A GAS SPRING}

The present invention relates to a gas spring device.

Generally, a gas spring is installed on the trunk lid or the tailgate side of the vehicle to match the opening and closing operation.

The gas spring acts as a passive type piston rod by the elastic member and the fluid pressure so that the opening and closing operation can be smoothly performed.

In particular, recently, there have been proposed gas springs having an active-type drive system in which a piston rod is forcibly moved by the power of a separate drive source. Among them, the present applicant "Patent Registration No. 10-1514823 " .

However, since the gas spring device of the above-mentioned Japanese Patent No. 10-1514823 has a power transmission structure in which the rack and the pinion are meshed with each other while pressing the piston rod side downward from above, the contact pressure, There arises a problem that the durability of the power transmission system is deteriorated early.

Further, according to the gear-engagement method of the rack and the pinion, since the drive system (for example, a motor) must be disposed in a state of being excessively deviated from the movement range of the piston rod, it is difficult to realize miniaturization of the device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art,

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas spring device which is simple in structure for switching and driving a piston rod to passive type or active type and can secure further improved operational stability and durability .

In order to realize the object of the present invention as described above,

A gas spring body having a housing and a piston rod;

A first connection supporting part arranged to surround the housing of the gas spring main body;

A second connection support portion that is fitted to the first connection support portion and is connected and disposed so as to be slidable in an operation direction of the piston rod;

A driving rod having a first gear portion connected to the piston rod in a state of being coaxial with the piston rod inside the second connection support portion;

A rod fixing unit configured to hold the driving rod in a connected state to restrict rotation about an axis line;

A rod driving unit having a first gear portion corresponding to the first gear portion of the driving rod and a second gear portion corresponding to the first gear portion of the driving rod and capable of driving the driving rod in the operating direction of the piston rod by the gear engaging force of the gear portions;

The gas spring device according to claim 1,

The piston rod of the gas spring main body is controlled by the rod fixing part and the rod driving part so that the movement of the driving rod is coaxial with the piston rod of the gas spring main body. It is possible to provide a structure in which the switching operation of the load can be stably performed.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the entire internal structure of a gas spring device according to an embodiment of the present invention; Fig.
2 to 8 are views for explaining the detailed structure and operation of the gas spring device according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention will be described by those skilled in the art to which the present invention is applicable.

Therefore, the embodiments of the present invention can be modified into various other forms, so that the claims of the present invention are not limited by the embodiments described below.

FIG. 1 is a schematic view showing the entire internal structure of a gas spring device according to an embodiment of the present invention. FIGS. 2 to 8 are views for explaining the detailed structure and operation, Includes a gas spring main body 2, a first connection supporting portion 4, a second connecting supporting portion 6, a driving rod 8, a rod fixing portion 10 and a rod driving portion 12.

The gas spring main body 2 is provided with a housing A and a piston rod B which is arranged so as to be able to move forward and backward in a state where one end is fitted in the inside of the housing A.

The gas spring main body 2 has a structure in which a working fluid (for example, nitrogen gas) inside the housing A and a structure in which the piston rod B is actuated in a state in which the piston rod B elastically moves forward or backward .

The first connection support portion 4 and the second connection support portion 6 are provided in a state where they are fitted to each other so as to be slidable in the operating direction of the piston rod B in a state where the gas spring main body 2 is wrapped.

1, the first connection supporting part 4 is arranged to surround the housing A of the gas spring main body 2 and the second connecting supporting part 6 is disposed in a state of wrapping around the housing A of the gas spring main body 2, And can be disposed in a connected state in which they are slidably fitted on the side.

According to the structures of the first connection supporting portion 4 and the second connecting supporting portion 6, the gas spring main body 2 can be protected from an external shock or friction, and the piston rod B can be made of a passive type or an active type It is possible to provide an airtight space for switching-driving.

The driving rod 8 is disposed in a connected state coaxial with the piston rod B of the gas spring body 2. [

That is, the driving rod 8 may be disposed in a connected state in which one end is coaxial with the end (free end) of the piston rod B as shown in FIG.

The driving rod 8 has a first gear portion C, and the first gear portion C is formed on the rod peripheral portion side.

2, the first gear portion C includes a gear portion extending in a spiral shape from the one end of the rod 8 in the rod longitudinal direction to the other end in the rod circumferential portion side, Respectively.

The first gear portion C preferably has a large gear lead angle C1 and may be formed to have a lead angle C1 within a range of approximately 45 degrees to 80 degrees. The backward and forward movement of the driving rod 8 can be performed in a state in which friction of the gear part during passive driving of the piston rod B in the gear-engaged state with the rod driving part 12, which will be described later, can be minimized.

The rod fixing part 10 is formed to have a structure capable of selectively holding the driving rod 8 arranged in a connected state coaxial with the piston rod B side so as to freely rotate around the rod axis .

The rod fixing portion 10 may be provided with first and second support portions D1 and D2 corresponding to both ends of the driving rod 8 and a locking device E as shown in Fig. .

The first and second support members D1 and D2 are each provided with a support groove D3 so that the end portions of the drive rod 8 and the piston rod B are connected to each other The second support portion D2 may be disposed in a state in which the first support portion D1 is disposed and the other end portion of the drive rod 8 is connected to the inside of the second connection supporting portion 6. [

The first support plate D1 is fixed to the end portion (free end) side of the piston rod B and one end of the drive rod 8 is fitted to the support groove D3 side, And can be set to be connected in a rotatable manner.

The other end of the drive rod 8 is fitted to the support groove D3 side so that the second support portion D2 can freely rotate around the rod axis And can be set to the connected state.

The support grooves D3 of the first support D1 and the second support D2 are formed in grooves which can be connected and supported in such a manner that end portions of the drive rod 8 are fitted respectively and freely rotatable about the rod axis, Structure.

The locking device E is for selectively restricting the rotation of the driving rod 8, and may be formed in a structure in which a locking operation is performed in a disc contact manner.

The locking device E has two contact discs F1 and F2 and an actuator G for driving the two contact discs F1 and F2 in contact or noncontact states with each other, And may be provided on the second support D2 side of the two support points D1 and D2.

The two contact disks F1 and F2 each have a contact surface F3 and these contact surfaces F3 are capable of restraining the rotation of the drive rod 8 when they come into contact with each other, .

The two contact discs F1 and F2 are disposed such that the contact surfaces F3 face each other inside the support groove D3 of the second support D2, 8 and the other one of the contact discs F2 can be arranged so as to be movable in the forward and backward directions toward the facing disc side by the drive of the actuator G while being able to perform the locking operation. At this time, the two contact disks F1 and F2 are fixedly installed in a state in which they are not rotated.

The actuator G is set not to be shown in the drawing but to be able to drive the one contact disk F2 in a state in which the one contact disk F2 is moved toward the other contact disk F1 by applying electric power in a normal manner.

That is, when driving the gas spring in the passive type, the rod fixing part 10 is configured such that the two contact disks F1 and F2 are separated from each other as shown in FIG. 4 so that the driving rod 8 can freely rotate about the axis line So that the lock releasing state can be established.

When the gas spring is driven in the active type by the operation of the rod driving unit 12 to be described later, two contact disks F1 and F2 are provided as shown in FIG. 5 so that the driving rod 8 is not rotated about the axis So that they are brought into contact with each other to achieve a locking state.

The rod driver 12 is formed to have a structure capable of forcibly moving the driving rod 8 in the forward and backward directions by the engaging force of the gear to drive the gas spring in an active type.

The rod driving section 12 includes a rotary shaft I having a first gear portion C of the driving rod 8 and a second gear portion H corresponding thereto, A driving source J may be provided.

The rotary shaft I is formed in a ring shape, for example, so that the second gear portion H can be gear-engaged with the first gear portion C of the driving rod 8 in the form of an internal gear And the second gear portion H is formed on the inner peripheral surface of the ring.

2, the first gear portion C and the second gear portion H are engaged with each other so as to surround the rod portion of the driving rod 8, The first connection support portion 4 can be disposed in the state of being engaged with the first connection support portion 4 in the form of gear engagement.

The driving source J can use a motor and is configured so that the rotary shaft I is fitted in the motor so that the rotary shaft I can be rotated in the forward and reverse directions with respect to the center by the magnetic force of the coil part do.

The driving source J is fixed to the inside of the first connection supporting portion 4 and may be set so as to generate forward and reverse rotational force by receiving electricity in a normal manner although not shown in the drawing.

The second gear portion H is engaged with the first gear portion C so that the driving rod 8 is moved along the axial line by the gear engaging force during forward and reverse rotations of the rotary shaft I And is configured to have a gear structure capable of moving in forward and backward directions.

As the rod fixing part 10 and the rod driving part 12 are operated in conjunction with each other, the operation of the driving rod 8 can be controlled so that the gas spring can be switched to the active type or the passive type.

For example, as shown in FIG. 4, the locking device E is operated so that the contact discs F1 and F2 of the rod fixing part 10 are spaced apart from each other, so that the driving rod 8 can freely rotate about the axis line Release the locking state.

Then, the driving rod 8 connected to the piston rod B side, which is moved forward by the fluid pressure and the elastic force of the elastic member, is unidirectionally rotated about the rod axis as shown in FIG. 6, RTI ID = 0.0 > I) < / RTI >

The rotation and the forward movement of the drive rod 8 are performed by the second gear portion H on the side of the rotation opening I in a state in which the first gear portion C and the second gear portion H are engaged with each other, And the movement of the first gear portion C on the side of the driving rod 8 is guided along the spiral-shaped gear extending direction of the first gear portion.

Therefore, when the rod fixing part 10 releases the locking state of the driving rod 8, the piston rod B of the gas spring main body 2 can be driven in a passive type.

5, the locking device E is operated so that the contact discs F1 and F2 of the rod fixing part 10 are brought into contact with each other, so that the freeing of the driving rod 8 Lock to limit rotation.

7 and 7 by the gear engagement of the first gear portion C and the second gear portion H when the rotary shaft I is rotationally driven in one direction by the driving source J of the rod driving portion 12, The driving rod 8 is moved forward in a state of passing through the interior of the rotary shaft I as well.

At this time, since the rotation of the driving rod 8 is restricted around the rod axis, the rotational force of the first gear portion C and the second gear portion H, Lt; / RTI > If the rod driving unit 12 is driven in a state where the locking of the driving rod 8 is released, the driving rod 8 is operated only in a state of being rotated around the rod axis without moving forward (linear direction).

Therefore, when the rod fixing portion 10 locks the rotation of the driving rod 8 to be restricted, the piston rod B of the gas spring main body 2 can be forcibly driven to the active type.

According to the structure and operation of the rod fixing part 10 and the rod driving part 12, particularly in the active type driving, the periphery of the driving rod 8 is surrounded by the rotary part I, H can be stably and uniformly engaged with each other.

Since the rod fixing part 10 and the rod driving part 12 are provided in a state in which they are installed inside the first connection supporting part 4 to the second connection supporting part 6 without integrally projecting to the outside, In addition, miniaturization can be easily implemented.

Although the passive type and the active type of the driving type that are compatible with the forward movement of the piston rod B have been described above, the backward movement of the piston rod B may be driven in a passive type or an active type You may.

Therefore, the present invention is not limited to the passive type driving of the gas spring itself but can be driven in an active type that forcibly moves the piston rod B back and forth. For example, when the door of a vehicle is opened and closed, It is possible to provide operability and functionality that can ensure improved operational convenience.

2: gas spring body 4: first connection support part 6: second connection support part
8: driving rod 10: rod fixing part 12: rod driving part
A: Housing B: Piston rod

Claims (12)

A gas spring body having a housing and a piston rod;
A first connection supporting part arranged to surround the housing of the gas spring main body;
A second connection support portion that is fitted to the first connection support portion and is connected and disposed so as to be slidable in an operation direction of the piston rod;
A driving rod having a first gear portion connected to the piston rod in a state of being coaxial with the piston rod inside the second connection support portion;
A rod fixing unit configured to hold the driving rod in a connected state to restrict rotation about an axis line;
A rod driving unit having a first gear portion corresponding to the first gear portion of the driving rod and a second gear portion corresponding to the first gear portion of the driving rod and capable of driving the driving rod in the operating direction of the piston rod by the gear engaging force of the gear portions;
. The method according to claim 1,
Wherein the first connection support portion and the second connection support portion comprise:
Each of which has an inner space and is connected to one end of the piston rod so as to be slidable in an operating direction of the piston rod. The method according to claim 1,
The drive rod
And the first gear portion is formed in an extended state in a spiral shape on the peripheral side along the rod longitudinal direction. The method of claim 3,
The first gear portion
And the helical gear portion lead angle is formed within the range of 45 to 80 degrees. The method according to claim 1,
The rod-
Two support shafts for connecting and supporting one end and the other end of the drive rod disposed coaxially with the piston rod in a state of free rotation about a rod axis, A gas spring device comprising: a locking device formed to limit operation; and a gas spring device disposed inside the second connection support part. The method of claim 5,
The two support members may be formed by,
Wherein the rod end side of the drive rod is provided with a support groove which is fitted in a connected state in which the free end of the rod can be freely rotated around the axis, and one of the support holes is fixed to the piston rod side, And is fixed to the inner surface of the second connection supporting portion. The method of claim 5,
The locking device includes:
Wherein the two contact discs are formed to be capable of restricting the turning operation of the drive rod while the two contact discs are in contact with each other or in a contactless state in accordance with the operation state of the rod drive unit. The method of claim 7,
The two contact discs
And a contact surface formed so as to generate a latching force or a frictional force in a state in which the rotation of the drive rod can be restricted. The method of claim 7,
The locking device includes:
Wherein the two contact discs are set in contact with each other when the rod driving unit is driven. The method according to claim 1,
Wherein the rod-
And a second gear portion formed to be capable of meshing with the first gear portion side of the driving rod, and a driving source for rotationally driving the rotating gear in a gear engagement state. The method of claim 10,
The rotation shaft
The second gear portion is gear-engaged in the form of an internal gear that surrounds the first gear portion of the driving rod, and the driving rod is rotated in a gear-engaged state to move the driving rod in the forward and backward directions The gas spring device is set. The method of claim 10,
The drive source
Wherein the motor is used and is set to a state in which the rotary tool can be rotationally driven by a rotational force.
KR1020150090067A 2015-06-24 2015-06-24 A gas spring KR101666679B1 (en)

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KR1020150090067A KR101666679B1 (en) 2015-06-24 2015-06-24 A gas spring

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KR1020150090067A KR101666679B1 (en) 2015-06-24 2015-06-24 A gas spring

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KR101666679B1 true KR101666679B1 (en) 2016-10-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102185226B1 (en) * 2019-11-29 2020-12-01 동명대학교산학협력단 Tailgate spindle drive with multiple spindles and interrupters

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130117121A (en) * 2012-04-17 2013-10-25 김종우 Shock absorber for car
US20140137680A1 (en) * 2012-11-22 2014-05-22 Messier-Bugatti-Dowty Mechanical actuator with a hydraulic damper device
KR101438333B1 (en) * 2013-09-13 2014-09-04 김찬용 cylinder with spring
KR101514823B1 (en) * 2013-11-14 2015-04-23 주식회사 한일정밀 gas spring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130117121A (en) * 2012-04-17 2013-10-25 김종우 Shock absorber for car
US20140137680A1 (en) * 2012-11-22 2014-05-22 Messier-Bugatti-Dowty Mechanical actuator with a hydraulic damper device
KR101438333B1 (en) * 2013-09-13 2014-09-04 김찬용 cylinder with spring
KR101514823B1 (en) * 2013-11-14 2015-04-23 주식회사 한일정밀 gas spring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102185226B1 (en) * 2019-11-29 2020-12-01 동명대학교산학협력단 Tailgate spindle drive with multiple spindles and interrupters

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