KR101672170B1 - Vehicle lift - Google Patents

Abstract

The present invention relates to a cylinder lift and, more specifically, to a cylinder lift which prevents safety accidents generated when the cylinder lift is electrically controlled by forming a control unit for allowing the fluid required for operating a cylinder to flow or cutting off the fluid in a mechanical type, and minimizes the contact area of a rod coming in contact with the inner surface of a tube as the rod is supported and slid in a longitudinal direction through one or more liners installed in a cover installed in the tube at predetermined intervals, thereby enabling the cost-efficient and easy manufacture of the cylinder lift.

Description

Cylinder Lift {VEHICLE LIFT}

[0001] The present invention relates to a cylinder lift, and more particularly, to a control system for controlling a flow of a fluid necessary for cylinder operation, So that the rod is moved in the longitudinal direction while being supported by at least one liner provided at a predetermined distance apart from the cover mounted on the cover, thereby minimizing the area in which the rod is in contact with the inner surface of the tube.

A lift is a device that moves to a place where a vehicle or cargo is desired. These lifts are often used for maintenance of vehicles around us. A vehicle lift is a lift that lifts a car up and works safely and conveniently as the space between the car and the ground is small, such as replacing tires, maintenance of the lower part of the vehicle, and oil change. Patent Literature 1 to Patent Literature 3 discloses a technique relating to a lift which can lift a car and make the lower work easier.

(Patent Document 1) Korean Patent No. 1510055

A body portion having a supporting portion rotatably engaged with both sides; And a pair of arms coupled to both ends of each support portion and positioned on both sides of the wheel in accordance with extension and contraction of the support portion, and the body portion includes a control portion for adjusting a width between the arms .

(Patent Document 2) Korean Patent Publication No. 10-2015-0137510

The present invention relates to a two-stock lifting device capable of adjusting the distance between shafts, comprising: a front side post vertically installed on one side of a dock bottom bed of a dock in which a dock opening is formed; A carriage disposed on the other side of the dock bottom bed of the dock and transported horizontally; And a rear side post installed in a vertical direction on the upper side of the carriage, wherein the rear side post is moved in the forward direction corresponding to the vehicle type of the inspection target vehicle disposed in the dock opening, based on data input to the control box or the remote controller And the overall height of the front side post and the rear side post is set based on data input to the control box or the remote controller. Thus, the front side post and the rear side post are raised and lowered with a set height in a state in which the carriage on which the rear side post is mounted is slid along the front and rear sliding rails in correspondence with the vehicle-to-vehicle distance by vehicle type, So that there is an effect of lifting up.

(Patent Document 3) Korean Patent Publication No. 10-2016-0030778

The present invention relates to a lifting device for an automobile, and moreover, a safety device for preventing sudden accidents is installed by installing a locking device in a hydraulic cylinder having a tuning function for controlling the height of the lifting and lowering left and right lifts. And a part of the rail is folded and elongated so as to facilitate movement of an operator in the case of automobile equipment and movement of machinery necessary for various maintenance.

However, such a cylinder type lift causes the following problems. Here, the problem is explained by taking the car lift as an example, but it will be easily understood by those skilled in the art that the same problem occurs in other types of lift that carries cargo. As such, the cylinder lift is incompressible and uses a precise operating force and a controllable hydraulic cylinder. However, the following problems occur in the hydraulic cylinder.

(1) The hydraulic cylinder stores the working fluid in the tank and then supplies it to the cylinder, lifts the top plate, and returns the working fluid back to the tank after finishing the bottom work of the car. At this time, there is a risk that a fire or the like may occur in the control means for controlling such a working fluid.

(2) That is, the working fluid is configured to circulate along the predetermined path in accordance with the cylinder operation. At this time, an opening / closing means such as a valve is mounted on the path for supplying the working fluid to supply and interrupt the working fluid. At this time, the opening / closing means is usually controlled to operate electrically. When supplying power and shutting off, there is a risk of fire due to sparking when repeating contact and non-contact between the terminals.

(3) Especially, when such a safety accident occurs when lifting up the top plate and working the lower part of the automobile, there is a possibility that the damage to the automobile as well as the life of the operator may be threatened.

(4) Since the rod ring (or piston) mounted on the rod is in contact with the inner surface of the tube to block the flow of the fluid and move in the longitudinal direction along the inner surface of the tube, the inner surface of the tube must be precisely machined. That is, since the cylinder normally receives the fluid into one side of the tube and the rod ring (or piston) mounted on the rod by the force moves in contact with the inner surface of the tube, the rod ring or piston thus contacts the inner side of the tube In order to move it, the entire inner surface of the tube must be precisely machined.

(5) Since the cylinder is an actuator that operates in the longitudinal direction, the longer the length, the wider the area to be precisely machined on the inner surface of the tube, and the longer the manufacturing time, So it is difficult to process.

(Patent Document 1) Korean Registered Patent No. 1510055 (Registered on Apr. 2015)

(Patent Document 2) Korean Patent Laid-Open No. 10-2015-0137510 (published on December 12, 2015)

(Patent Document 3) Korean Patent Laid-Open No. 10-2016-0030778 (Publication date: 2013.03.21)

SUMMARY OF THE INVENTION The present invention has been made in consideration of this point, and it is an object of the present invention to provide an air conditioner capable of mechanically opening and closing a fluid flow required for a cylinder operation so as to prevent a safety accident such as a short- So that the sliding guide of the rod can be performed through the inner surface of the tube, thereby minimizing the precision machined portion in the inner surface of the tube, thereby making it easy and cheap to manufacture and use the cylinder lift.

Particularly, the present invention is configured to control the flow of the fluid to the bar, so that the structure is simple, accurate and quick to control the flow of the working fluid, and the size of the fluid tank for storing the fluid is reduced, Another object of the present invention is to provide a cylinder lift capable of reducing the installation space by making it smaller.

In addition, since the upper plate supporting the automobile actually mounted on such a cylinder can also be installed in a buried form in parallel with the ground when the cylinder lift according to the present invention is installed, the cylinder lift of the present invention is mounted on the normally completed building, It is an object of the present invention to provide a cylinder lift capable of minimizing the protrusion of the cylinder lift onto the ground surface.

The cylinder lift according to the present invention includes a cylinder 200 for vertically moving the upper plate 100 supporting the automobile or the cargo up and down, and the cylinder 200 has a predetermined length A tube 210; A rod 220 which is inserted into the tube 210 and moves in the longitudinal direction without touching the inner surface of the tube 210 and the other is protruded out of the tube 210 and fixed to the upper plate 100; A fluid tank 230 having a length shorter than the tube 210 so as to surround the outer surface of the tube 210 and having a fluid filled therein; One of which is connected between one side of the rod 220 and the tube 210 and the other side of which is connected to the fluid tank 230 so as to move the rod 220 in the longitudinal direction by the fluid filled in the fluid tank 230 A tube 240; One of which is connected to an actuator 251 mounted on the fluid tank 230 and the other of which is inserted in the operation pipe 240 and moves in the longitudinal direction to form a through hole 241 formed in the operation pipe 240 A bar (250) having at least one seal (252) to block or open fluid flow therethrough; A control adapter 260 attached to the fluid tank 230 at a position close to the upper plate 100 to inject or discharge compressed air into the fluid tank 230; And a cover 280 closing one of the open ends of the tube 210 and extending into the tube 210 so as to support the rod 220 protruding from the tube 210, The tube 210 further includes a support portion 212 extending from the end of the fluid tank 230 to the other end of the fluid tank 230 where the fluid tank 230 is not formed, At least one liner (281) spaced apart at a predetermined distance so as to be able to support it in a longitudinal direction; And at least one sealing ring (282) provided at a predetermined distance so as not to leak the fluid between the rod (220) and the cover.

Particularly, in the fluid tank 230, an outlet is formed so that the fluid injected from the outside may be discharged to the outside in order to apply pressure to the working fluid filled in the fluid tank 230, And a fluid collection tank (262) for collecting the working fluid contained in the fluid.

Further, the upper plate 100 is installed so as to be embedded in the bottom surface or protruded. In this case, the upper plate 100 is formed in an "H" shape, and each of the ends of the upper plate 100 can be inserted into or withdrawn from the upper plate, thereby adjusting the length.

The tube 210 is further provided with a support portion 212 extending from the end of the fluid tank 230 to the other end of the tube 210 where the fluid tank 230 is not formed.

When the tube 210 is installed upright to support the upper plate 100, the bar 250 is installed in parallel with the tube 210, and the through hole 241 And is opened or closed.

On the other hand, the actuator 251 is a pneumatic or hydraulic cylinder.

The tube 210 and the fluid tank 230 are provided with a fixing means 270 for fixing the rod 220. The fixing means 270 may be installed on the tube 210 or the fluid tank 230, Two arms 271 and 272 provided on the fluid tank 230 so as to face each other so as to surround the rod 230 and having a packing 271a and 272a on the surfaces facing each other; And a cylinder 273 fixed to one of the arms 271 and fixed to the other arm 272 of the rod.

In addition, the upper plate 100 includes a base 120 having a predetermined size; And four support arms 130 installed on the base 120 so as to be rotatable in one plane and the support arms 130 are rotatably mounted on the base 120 A rotary arm 130a having a plurality of first adjustment holes 131 formed at predetermined intervals on one side thereof; An adjustment arm 130b which is fitted to the rotary arm 130a and whose length is adjusted and a plurality of second adjustment holes 132 are formed at predetermined intervals so as to overlap with the first adjustment hole 131; And a fixture 133 which is fitted and fixed to the first and second adjustment holes 131 and 132 which are overlapped with each other.

The cylinder lift according to the present invention has the following effects.

(1) Since the configuration for supplying or blocking the fluid to the cylinder is mechanically configured, this configuration can prevent a safety accident that may occur due to electrical leakage or short circuit or the like due to the cylinder not operating normally.

(2) In particular, this shut-off configuration is configured to supply or shut off the flow of the fluid mechanically in the fluid-locked state as the working fluid, so that there is less risk of foreign matter being caught in the shut-off configuration and the working fluid is cooled and lubricated Enabling smooth and smooth fluid flow.

(3) Since the size of the tank for storing the fluid required for cylinder operation is minimized, the volume of the cylinder can be reduced. In addition, since the reduced portion is supported by the support portion, the fluid tank and the support portion are divided into two portions to support the outer portion of the tube, so that the structural rigidity can be reinforced.

(4) In addition, since the fluid is supplied to the space surrounded by the tube, the rod and the liner, the supplied fluid can support the rod to prevent deformation or breakage of the rod, and can be used more safely.

(5) Since the supporting arm of the upper plate supporting the car or cargo is adjusted to rotate and adjust the length, the length of the supporting arm can be adjusted to the full length and width of the car or cargo, have.

(6) On the other hand, since the rod is supported by two liners mounted on a cover closing one of the open ends of the tube and is configured to be accommodated and taken out of the tube, the area of the tube contacting the rod can be minimized.

(7) This is because only the inner surface of the two liner or the cover for supporting these liner can be precisely processed to support the rod, so that the entire inner surface of the tube is not required to be precisely machined, It can be easily produced.

(8) On the other hand, the cylinder lift according to the present invention can be used not only as an actuator constituting an automobile lift, but also in any field where a cylinder type actuator which moves in the longitudinal direction like a cylinder is required

1 is a plan view showing a structure of a cylinder lift according to the present invention.
2 is a cross-sectional side view showing the structure of a cylinder lift according to the present invention.
[Fig. 3] is a side view illustrating the entire structure of the cylinder according to the present invention.
4 is a side cross-sectional view showing a state in which the cylinder lift is raised according to the present invention.
FIG. 5 is an enlarged view of a portion "A" in FIG. 2 for showing a state of supplying or blocking a fluid according to the present invention. FIG. 5 (a) Indicates a state in which the fluid flow is shut off.
6 is a plan view of a cylinder for explaining a configuration of a fixing means according to the present invention.
FIG. 7 is an enlarged view of a portion "D" in FIG. 2 for showing a state in which a liner is installed in a tube according to the present invention;
8 is a plan view showing another embodiment of the top plate according to the present invention.
9 is a plan view showing a configuration of a support arm constituting an upper plate according to another embodiment of the present invention.
FIG. 10 is a plan view showing a range that can be supported by a top plate according to another embodiment of the present invention. FIG.
11 is a cross-sectional view showing an example of a tube according to another embodiment of the present invention.
12 is a front view showing an example of a load according to another embodiment of the present invention.
[Fig. 13] is a plan view for showing a state of engagement of a retainer with a rod of [Fig. 12] according to another embodiment of the present invention, and a cross-sectional view is for showing a coupling part and a flow path of the structure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should properly define the concept of the term to describe its invention in the best possible way The present invention should be construed in accordance with the spirit and scope of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Thus, various equivalents And variations may be present.

(Configuration)

The cylinder lift according to the present invention includes an upper plate 100 supporting an automobile or a cargo underneath and a cylinder 200 moving the upper plate 100 up and down as shown in Figs. .

Particularly, the cylinder 200 minimizes the fluid tank 230 supplying the fluid required for the operation, thereby reducing the volume of the cylinder lift to reduce the mounting space, and the control means for mechanically supplying and blocking the working fluid Not only does not cause a safety accident such as a short circuit or an electric shock, but also makes the control means immerse in the fluid, so that the foreign matter can be smoothly operated by lubricating action.

The cylinder 200 is provided with at least one liner 281 on the inner surface of the cover 280 that closes one of the openings so that the liner 281 is supported when the rod 220 moves in the longitudinal direction, The fluid can be filled between the tube 210 and the rod 220 without precisely machining the entire inner surface of the tube 210, so that the rod 220 can be stably supported and guided.

The tube 210 is further provided with a support portion 212 extending from the end of the fluid tank 230 so as to reinforce the structural rigidity of the cylinder 200 through the support portion 212 It is possible.

Hereinafter, this configuration will be described in more detail.

As shown in Figs. 1 to 4, the upper plate 100 is manufactured in such a form that it can be lifted up by supporting an automobile or a cargo. The upper plate 100 supports a frame portion in the case of an automobile, and can be manufactured in a panel form. Alternatively, the upper plate 100 may be formed in an "H" have. Of course, when the cargo is supported, it is made in the form of a plate.

In addition, the upper plate 100 is provided with rubber pads 110 on both end portions thereof, as shown in Fig. The rubber pad 110 is for preventing the car or the frame from being damaged when the top plate 100 supports the car frame.

In the preferred embodiment of the present invention, the top plate 100 is provided with at least two rubber pads 110, typically two or three rubber pads 110, which preferably support the front or rear of the automobile frame, It is preferable that the rubber pad 110 is separated and the separated portion is inserted into the upper plate 100 so that the rubber pad 110 can be expanded and contracted. This is because the overall length varies depending on the type of vehicle, so that even if the distance between the front tire and the rear tire changes, it is possible to properly adjust the distance to the distance through the separation part.

Also, in a preferred embodiment of the present invention, the top plate 100 is made such that the top plate is buried in the bottom surface except for the rubber pad 110, as indicated by "B" in FIG. 2 The vehicle can be easily installed on the upper plate 100. Of course, the upper plate 100 may be placed on the ground as indicated by "C" in FIG. 2. At this time, the height of the upper plate 100 may be made too high so that the vehicle easily rises above the top plate 100 It is desirable to configure it.

The cylinder 200 includes a tube 210, a rod 220, a fluid tank 230, an operation tube 240, a bar 250, an adapter 260, And a cover 280.

The tube 210 is made hollow as shown in FIGS. 2 and 3 so that the rod 220 to be described later is inserted and slid. In particular, the tube 210 is configured such that one end thereof is blocked and the other end thereof is protruded from the end of the rod 220. Such a tube 210 uses a tube manufactured by a conventional technique in the technical field to which the cylinder belongs.

In a preferred embodiment of the present invention, the tube 210 preferably further comprises a support 212 as shown in Figures 2, 3 and 4. The support portion 212 is formed on the outer periphery of the tube 210, which is formed on a part of the outer circumference of the tube 210 and is not formed with a fluid tank 230 described later. That is, the fluid tank 230 is formed to have a predetermined length along the longitudinal direction from one side of the tube 210 in the form of a cylinder. The support part 212 has a tube 210 at the end of the fluid tank 230 ) Extending to the other side. It is preferable that the mounting flange 212a is formed at the extended end so that the cylinder 200 can be easily mounted through an anchor bolt or a mounting bolt when the cylinder 200 is mounted.

Further, in the preferred embodiment of the present invention, the supporting portion 212 is formed as a tubular shape by way of example, but the present invention is not limited thereto. That is, if the support portion 212 is configured to be installed between the end of the fluid tank 230 and the other end of the tube 210 to which the fluid tank 230 is not attached, Structure is possible. For example, it is easily understood by those skilled in the art that the support portion 212 may be formed in a bar shape or a polygonal tube shape, which are arranged in parallel with the tube 210 at predetermined intervals. Since the outer circumference of the tube 210 is divided and supported by the fluid tank 230 and the support portion 212, the tube 210 can not only reinforce the structural rigidity but also be easily mounted through the mounting flange 212a.

As shown in Figs. 2 and 4, the rod 220 is configured such that one side of the tube 210 is slidably fitted and the other side thereof protrudes to the outside of the tube 210, The upper plate 100 is supported and fixed.

Particularly, the rod 220 is configured so as not to be in contact with the tube 210 when fitted to the tube 210, as shown in FIGS. 2, 3 and 4, It is preferable to configure it so that it can be filled. For this, the outer diameter of the rod 220 is made slightly smaller than the inner diameter of the tube 210, and the fluid entering between the tube 210 and the rod 220 is cooled and lubricated by the surface of the rod 220, So that it can be supported by being bent or eccentrically supported.

In the preferred embodiment of the present invention, the rod 220 has a retainer 222, which seals the end of the tube 210 inserted into the tube 210, as shown in FIGS. 12 and 13, It is preferable to configure to be supported so as to stably operate without shaking or bending. At this time, as shown in Fig. 13 (c), at least two support protrusions 221 are formed on the outer circumference of one end of the rod 220, And the flow path 222c is formed between the retainer 222 and the retainer 222 as shown in Fig.

That is, the retainer 222 is configured to have a seal 222b on its outer periphery so as to be brought into close contact with the inner surface of the tube 210 as shown in Figs. 12 and 13 (b) The fixing protrusion 221a is protruded and formed. 13 (c)), the retainer 222 is fixed by sandwiching the fixing protrusion 221a against the support protrusion 221, and then the end of the rod 220 is fixed to the tube 210 The retainer 222 closely contacts the inner surface of the tube 210 to perform a sealing action and a flow path 222c is formed between the rod 220 and the retainer 222. [ At this time, as the fluid enters the tube 210 due to the operation of the cylinder or vice versa, the flow passage 222c causes the fluid to pass on both sides with respect to the retainer 222 so that the rod 222 is operated in the longitudinal direction . Therefore, the rod 220 is supported by both the liner 281 and the retainer 222, which will be described later, and stably operates.

The fluid tank 230 is formed so as to surround the outside of the tube 210 as described above with reference to FIGS. 2 and 3, and the rod 220 is moved in the longitudinal direction When storing the fluid used.

Particularly, it is preferable that the fluid tank 230 is made shorter than the length of the tube 210. This is to prevent the entire volume of the cylinder 200 according to the present invention from increasing as much as possible, so that the cylinder 200 can be installed easily in a narrow space.

The working pipe 240 is connected to the tube 210 on one side and to the fluid tank 230 on the other side as shown in Figures 2, 3, 4 and 5 do. At this time, one end connected to the tube 210 is installed to be able to supply the fluid between the lower part of the tube 210, preferably between one side of the rod 220 fitted to the tube 210 and the tube 210.

In the preferred embodiment of the present invention, the other end of the operation pipe 240 is preferably mounted on the bottom of the fluid tank 230 as shown in FIGS. 2 and 4. This is to allow the fluid to flow through the working pipe 240 when the fluid tank 230 is filled with fluid, and to allow most of the fluid to flow through the working pipe 240. [

In the preferred embodiment of the present invention, the protruding portion of the operation tube 240 protruding into the other side of the fluid tank 230 preferably has a through hole 241 (see FIG. 2) ) Is preferably formed. The through hole 241 is formed in the through hole 241 so that a bar 250 to be described later is inserted into the operation pipe 240 and is blocked or opened according to the movement so as to allow fluid flow through the operation pipe 240, use.

Lastly, in the preferred embodiment of the present invention, it is preferable that the operation tube 240 is made as short as possible to connect the tube 210 and the fluid tank 230, as shown in FIG. This is to reduce the length of connecting the tube 210 in the fluid tank 230 to reduce the flow resistance and the frictional resistance in this section so that the rod 220 can smoothly operate in the tube 210.

The bar 250 is inserted into the end of the operation pipe 240 connected to the above-described fluid tank 230 at one end as shown in FIGS. 2, 3, 4 and 5, One of which is installed so as to protrude out of the fluid tank (230). An actuator 251 is mounted on the end protruding out of the fluid tank 230 so as to move the bar 250 in the longitudinal direction.

The other end of the bar 250 protrudes out of the fluid tank 230. However, the bar 250 may be mounted in the fluid tank 230 together with the actuator 251 to reduce the mounting space.

In addition, the actuator 251 may be of any type as long as it can move the bar in its longitudinal direction. For example, a pneumatic or hydraulic cylinder may be used.

Meanwhile, the bar 250 is installed in the fluid tank 230 so as to be positioned in parallel with the tube 210 when the cylinder 200 is vertically mounted, as shown in FIGS. 2 and 4, It is preferable that the end that enters into the tank 230 is fitted to the above-described operation pipe 240 while being locked in the fluid, and is movably mounted in the longitudinal direction. This is because it is possible to move along the operation pipe 240 while moving the fluid in the longitudinal direction while preventing the fluid from leaking through the portion of the bar 250 protruding out of the fluid tank 230. Particularly, So that it is possible to prevent sticking.

As shown in FIG. 5, the bar 250 may include at least one sealing ring 252 on one end of the operating pipe 240. The seal 252 is fabricated in a conventional manner to prevent fluid from leaking into the gap between the seal 252 and the bar 250 when the bar 250 is inserted into the actuating tube 240 and moves. In the figure, the sealing 252 shows an example in which two are constituted.

When the bar 250 is lifted up by the operation of the actuator 251 as indicated by the arrow in FIG. 5 (a), the fluid in the fluid tank 230 through the through- The bar 250 is lowered to block the flow of the fluid through the through hole 241 when the actuator 251 is operated in the reverse direction as shown in Fig. 5 (b) .

The control adapter 260 is mounted on the above-described fluid tank 230 and is configured to inject or discharge compressed air into the fluid tank 230 as shown in Figs. At this time, the fluid to be injected is exemplified by compressed air, but a person skilled in the art can readily know that a gas such as nitrogen gas can be injected.

When the compressed air is injected into the fluid tank 230 in the state as shown in FIG. 2, the fluid injected into the fluid tank 230 flows into the control adapter 260 through the tube 210 as shown in FIG. 4, And lifts up the upper plate 100 while being pushed into between the rod 220 and the rod 220. When the compressed air injected into the fluid tank 230 is removed through the control adapter 260, the fluid that has entered between the tube 210 and the rod 220 returns to the fluid tank 230, The upper plate 100 descends as shown in Fig.

In a preferred embodiment of the present invention, the control adapter 260 is configured to allow the rod 220 to be actuated by, for example, pushing in the compressed air and then returning the rod 220 to its original state, It is necessary to remove the compressed air that has been injected into the fuel tank 230. At this time, there is a possibility that a part of the working fluid filled in the fluid tank 230 is mixed with the compressed air due to the internal pressure. Therefore, it is preferable that the control adapter 260 is additionally mounted on the fluid collection tank 262 so that only the air can be filtered by filtering the working fluid as shown in Fig. At this time, the fluid collecting tank 262 collects the working fluid contained in the air or the like when discharging the air filled in the fluid tank 230 to operate the rod 220, . In the drawings, the reference numeral 261 denotes an outlet for guiding air to the fluid collection tank 262 when discharging compressed air as described above, and this outlet is preferably configured to be a part of the control adapter 260.

The cover 280 is attached to one side of the tube 210 while one side of the tube 210 is closed as shown in Figs. 2, 3, 4 and 7, So as to be movable in the longitudinal direction thereof.

In particular, the cover 280 may be formed in a flat shape, but it is preferable that the cover 280 is extended in a cylinder shape to be inserted into the tube 210 as shown in FIG. In addition, at least one liner 281 is mounted on the inner surface of the tube 210 at a predetermined interval so that the rod 220 can be supported by the liner 281 to move in the longitudinal direction . This is because when the cylinder according to the present invention is operated, the rod 220 is supported by the liner 281 so as to move in the longitudinal direction thereof, so that the internal area of the tube 210 abutting the rod 220 . ≪ / RTI > The cylinder 200 according to the present invention includes two liner 281 and the cover 280 together with the liner 281. The liner 281 is made of the same material as that of the conventional tube, Since only the inner surface needs to be precisely machined, the precision machined portion can be minimized, thereby making it possible to manufacture at low cost, easily and quickly. This liner 281 shows an example in which two pieces are formed in the drawing.

In a preferred embodiment of the present invention, the liner 281 may be any material capable of performing airtightness and support functions, but it is preferable to use a Teflon liner. Teflon is a product name of DuPont which is known to have almost complete chemical inertness and heat resistance, non-tackiness, excellent insulation stability and low coefficient of friction.

Finally, the cover 280 forms at least one sealing ring 282 on the surface in contact with the rod 220, as shown in FIG. The seal 282 is intended to prevent leakage of fluid into the gap with the cover 280 when the rod 220 moves in its longitudinal direction and uses a seal commonly used in the art to which the present invention pertains. It will be readily apparent to those skilled in the art that the sealing ring 282 may be mounted on the cover 280 so as to be positioned outside the liner 281 to prevent leakage of fluid. This sealing 282 shows an example in which two pieces are formed in the figure.

In the preferred embodiment of the present invention, the rod 220 is fixed to the tube 210 or the fluid tank 230 as shown in FIG. 2, FIG. 4, and FIG. 6, It is preferable that the fixing means 270 is further provided. Here, the fixing means 270 is described as being attached to the fluid tank 230 for convenience of explanation, but the same effect can be obtained even when the fixing means 270 is mounted on the tube 210.

The fixing means 270 includes two arms 271 and 272 and a cylinder 273 as shown in Fig. At this time, one of the two arms 271 and 272 is rotatably installed in the fluid tank 230, and the two arms 271 and 272 are mounted facing each other while rotating toward the rod 230. Packings 271a and 272a are mounted on the surfaces facing each other to protect the rod 230 from damage when the rod 230 contacts the rod 230.

As shown in Fig. 6, the cylinder 273 is mounted on any one of the arms 271 so as to be movable together, and the rod is mounted on the end of the other arm 271. This is because when the cylinder 273 is operated, the two arms 271 and 272 are opposed to each other and open or narrow to allow the rod 220 to be tightly fixed. At this time, it is preferable that the cylinder 273 is mounted so as to be rotatable on each arm, if rotation interference can occur.

The present invention configured as described above can block the flow of fluid required for the operation of the cylinder mechanically using the rod, so that a safety accident that may be caused by electrical contact or the like can be prevented in advance. In addition, since this cut-off configuration is made in the fluid used for the cylinder operation, not only the lubrication action of the cut-off configuration can be obtained, but also foreign matter can be prevented from being caught in advance, thereby enabling accurate and quick control operation.

(Another embodiment of the top plate)

The upper plate 100 'according to another embodiment of the present invention includes a base 120 and a base 440 which is provided so as to be rotatable in a plane with the base 120, as shown in FIGS. 8 to 10 Support arms (130).

Particularly, since the support arm 130 is configured to be rotatable with respect to the base 120 so as to be adjustable in its longitudinal direction, even if the overall width and height vary depending on the type of the vehicle, By adjusting the length, it is possible to apply to various kinds of automobiles and work underneath.

Hereinafter, this configuration will be described in more detail.

The base 120 is manufactured to have a predetermined size as shown in Figs. 8 and 10. At this time, it is preferable that the size of the support arms 130 is such that the four support arms 130 are rotatably supported. In the figure, the support arm 130 is rotatably mounted to the base 120 using a pin, and the support arm 130 is covered with a cover.

In addition, the base 120 may be formed in any shape as long as it can rotate while supporting the weight of the four support arms 130. Preferably, the base 120 is formed in a square shape, and the support arms 130 To be rotatable. This is to reduce the contact area with the base 120 when the support arm 130 rotates, minimize friction and facilitate easy rotation and reduce the overall size of the top plate 100 '.

The support arm 130 includes a rotary arm 130a having one side fixed to the base 120 as shown in Figs. 8 to 10, an adjustment arm 130b fitted to the rotary arm 130b and adjusted in length, And a fixture 133 for fixing the length adjusting position.

A first adjusting hole 131 is formed at a predetermined interval along the longitudinal direction of the rotary arm 130a and a second adjusting hole 132 is formed in the adjusting arm 130b at predetermined intervals along the longitudinal direction. . At this time, the first and second adjusting holes 131 and 132 are formed at positions where they can overlap with each other, and the length of the overlapping adjusting holes is adjusted by sandwiching the fixing hole 133.

Particularly, the gap G between the adjacent first adjusting holes 131 and the gap G 'between the adjacent second adjusting holes 132 may be the same or different. This is to enable various adjustments of the length of the adjusting arm 130b according to the positions of the first and second adjusting holes 131 and 132 which are overlapped with each other. In other words, if the intervals G and G 'are the same, the intervals that can be adjusted at one time can be adjusted only in the same interval unit. However, if the intervals G and G' are different from each other, So that a finer length can be adjusted.

The upper plate 100 'having the above-described structure is configured such that the total length L and the total width W when two support arms 130 are arranged side by side as shown in Fig. 8, as shown in Fig. 10 The length L 'and the total width W' of the support arm 130 adjacent to each other are different from each other as the support arms 130 are extended at angles of &thetas; 1 and &thetas; Thus, it is possible to perform a lower work on the vehicle of the vehicle within the full length and full width.

Herein, the present invention is described by way of example of supporting an automobile. However, the present invention is not limited to this, and if the cylinder is used as an actuator of a lift, it can be said that a lift according to the present invention can be used for an actuator If you are an industry worker, you can easily find out.

100, 100 ': upper plate 110: rubber pad
120: base 130: support arm
130a: rotating arm 120b: adjusting arm
131, 132: first and second adjusting holes 133:
200: cylinder 210: tube
220: load 230: fluid tank
240: working tube 241: through hole
250: bar 251; Actuator
260: control adapter 270: fixing means
271, 272: arm 273: cylinder

Claims (10)

And a cylinder (200) for vertically moving the upper plate (100) supporting the car or the cargo up and down,
The cylinder 200 includes a tube 210 having a predetermined length; A rod 220 which is inserted into the tube 210 and moves in the longitudinal direction without touching the inner surface of the tube 210 and the other is protruded out of the tube 210 and fixed to the upper plate 100; A fluid tank 230 having a length shorter than the tube 210 so as to surround the outer surface of the tube 210 and having a fluid filled therein; One of which is connected between one side of the rod 220 and the tube 210 and the other side of which is connected to the fluid tank 230 so as to move the rod 220 in the longitudinal direction by the fluid filled in the fluid tank 230 A tube 240; One of which is connected to an actuator 251 mounted on the fluid tank 230 and the other of which is inserted in the operation pipe 240 and moves in the longitudinal direction to form a through hole 241 formed in the operation pipe 240 A bar (250) having at least one seal (252) to block or open fluid flow therethrough; A control adapter 260 attached to the fluid tank 230 at a position close to the upper plate 100 to inject or discharge compressed air into the fluid tank 230; And a cover 280 closing one of the open ends of the tube 210 and extending into the tube 210 so as to support the rod 220 protruding from the tube 210,
At least one liner (281) is installed on the cover (280) at predetermined intervals to support the rod (220) movably in the longitudinal direction. And at least one sealing ring (282) provided at a predetermined interval so as not to leak fluid between the rod (220) and the cover.
The method of claim 1,
In the fluid tank 230,
In order to apply pressure to the working fluid filled in the fluid tank 230, an outlet for discharging the fluid injected from the outside to the outside is formed, and the outlet for collecting the working fluid contained in the fluid injected from the outside And a fluid collection tank (262).
The method of claim 1,
The upper plate (100)
Quot; H "shape,
Each end of either end can be inserted or withdrawn into the top plate to adjust its length,
And the cylinder head is installed so as to be embedded in the bottom surface or protruded.
The method of claim 1,
Wherein the tube (210) further comprises a support portion (212) extending from the end of the fluid tank (230) to the other end where the fluid tank (230) is not formed.
The method of claim 1,
The bar (250)
And is installed side by side with the tube 210,
Wherein the through hole (241) is closed or opened in a state in which the tube is immersed in fluid when the tube (210) is installed upright to support the upper plate (100).
The method of claim 1,
The actuator 251,
Wherein the cylinder is a pneumatic or hydraulic cylinder.
3. The method of claim 2,
The upper plate (100)
Quot; H "shape,
Each end of either end can be inserted or withdrawn into the top plate to adjust its length,
And the cylinder head is installed so as to be embedded in the bottom surface or protruded.
8. The method according to any one of claims 1 to 7,
The tube 210 and the fluid tank 230 are provided with fixing means 270 for fixing the rod 220,
The fixing means (270)
The fluid tank 230 is provided with a pair of packing members 271a and 272a on the surfaces thereof facing each other so as to surround the rod 230 in the tube 210 and the fluid tank 230, (271, 272); And
And a cylinder (273) fixed to one of the arms (271) and fixed to the other arm (272) by a rod.
8. The method according to any one of claims 1 to 7,
The upper plate 100 includes a base 120 having a predetermined size; And four support arms (130) rotatably mounted on the base (120) in a single plane,
The support arm 130 includes a rotary arm 130a rotatably mounted on the base 120 and having a plurality of first adjustment holes 131 formed at predetermined intervals on one surface thereof; An adjustment arm 130b which is fitted to the rotary arm 130a and whose length is adjusted and a plurality of second adjustment holes 132 are formed at predetermined intervals so as to overlap with the first adjustment hole 131; And a fixture (133) for fitting and fixing the first and second adjustment holes (131, 132) overlapping each other.
The method of claim 1,
At least two support protrusions 221 are protruded from the rod 220 at predetermined intervals on the outer periphery of the tube 210,
The support protrusion 221 is provided with a sealing ring 222b on its outer periphery so as to be in close contact with the tube 210. In the inner periphery thereof, a fixing protrusion 221a is protruded and formed at a position corresponding to the support protrusion 221, And a retainer (222) for forming a flow path (222c) between the rod (220) and the rod (220).

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