KR101056829B1 - Hydraulic cylinder for exercise equipment - Google Patents

Abstract

Hydraulic cylinder for exercise equipment according to the present invention is a compact structure by simplifying the structure to self-compensate the volume change of the fluid filled in the closed chamber to maximize the movement effect by providing precision and smoothness of the reciprocating motion of the piston and the fluid in the chamber It is possible to precisely control the flow to maximize the convenience of use.

The object of the present invention is a cylinder chamber of a double chamber divided into an inner chamber and an outer chamber filled with an incompressible fluid filled with a rod cover and a head cover on both sides of the outer tube and the inner tube, and installed in the inner chamber to reciprocate. The rod cover is assembled with a piston, the piston rod which is assembled with one side of the piston and extends to the outside with the rod cover in an airtight state, and a connection flow path between the rod cover and the head cover to connect the incompressible fluid of the inner chamber to the rod cover. And a guide pipe circulating and guided in one direction through the head cover in one direction, and the air contained in the outer chamber to compensate for the volume change of the piston rod due to the reciprocating motion of the piston. By constructing compressible compensation means consisting of air tubes.

Incompressible fluid, compressible compensation means, double chamber, check valve, hydraulic control means

Description

Hydraulic cylinder for exercise equipment {HYDRAULIC CYLINDER FOR EXERCISE APPARATUS}

The present invention relates to a hydraulic cylinder that is applied to an exercise device that can obtain a movement effect by pushing and pulling by using the muscle strength of the lower body, arms, etc. In particular, as a compact structure by simplifying the structure of the hydraulic cylinder of the fluid filled in the closed chamber This invention relates to a hydraulic cylinder for exercise equipment that maximizes the convenience of use by maximizing the movement effect by providing the precision and smoothness of the reciprocating motion of the piston by self-compensating the volume change and the precise control of the fluid pressure in the chamber.

In general, various kinds of exercise equipments have been recently disclosed for the purpose of health promotion, and these exercise equipments are installed and used indoors or outdoors such as health clubs and homes.

Such exercise equipment, for example, rowing machine, stepper, weight training device, etc. is to obtain the exercise effect by inhibiting the movement of the reciprocating motion by pushing and pulling using the strength of the arm and leg, such a reciprocating motion As a means for suppressing the pressure, a hydraulic cylinder is applied.

As an example of such a hydraulic cylinder for exercise equipment, there may be mentioned, for example, an 'advanced cylinder for exercise equipment' of the Korean Utility Model (Publication No. 20-1998-67561).

The above-mentioned conventional art constitutes a function capable of adjusting (fluid pressure) the flow of fluid (oil) to connect the both ends of the tube of the cylinder so as to obtain a proper exercise effect by adjusting according to the user's physical strength It constitutes the valve which can block or suppress the flow of a fluid between them.

However, this prior art has the following problems.

First, in the closed cylinder chamber, the volume change of the fluid (oil) filled in the position chamber of the piston rod and the opposite chamber with respect to the piston is difficult to occur under the same conditions, so that the piston cannot provide the reciprocation smoothness and the desired stroke. .

In other words, a liquid such as oil has an incompressible (shrinkable) characteristic in which volume, temperature, density, etc. are constant regardless of pressure, and thus the volume occupied by the piston rod according to the forward and backward movements of the piston. You cannot compensate for change. As a result, it is possible to reciprocate the piston as much as the volume part (occupancy) of the rod located in the rod chamber according to the piston reciprocating motion, so that it is difficult to set the operation amount as well as the initial design. As the air is filled, it is difficult to suppress effective exercise due to adverse effects such as noise and vibration due to the occurrence of cavitation.

Second, the hydraulic control by valves installed between the connecting pipes connecting the two chambers partitioned by the piston of the cylinder controls the flow rate of the flow rate, not the hydraulic force control, resulting in an irregular problem in the volume change caused by the temperature change of the external product. There is a disadvantage in that precise cylinder operation cannot be expected.

Third, there is a limitation in the disadvantages of the volume increase and the scope of application by drawing the connecting pipes on both outside of the cylinder tube and providing a valve between the connecting pipes to provide the flow of fluid to both chambers of the cylinder chamber.

Fourth, the flow of fluid (oil) was alternately filled and filled on both sides of the partition in accordance with the reciprocating motion of the piston, so that the regular reciprocating motion of the piston corresponding to the volume change of the fluid (oil) could not be provided.

Accordingly, an object of the present invention is to provide a precise and constant speed driving of a piston reciprocating motion by effectively compensating a volume change of traction and thrust motion of a piston with respect to a fluid (oil) filled in a closed (closed) cylinder chamber.

That is, the present invention provides a precise reciprocating movement of the piston by compensating the volume change of the piston rod in accordance with the movement of the piston in the fluid filled in the closed space within, and in particular the volume change according to the movement and return of the piston rod Its purpose is to prevent noise and vibration caused by piston reciprocation by eliminating cavitation caused by gas separation dissolved in liquid (oil).

In addition, the present invention induces the flow of the fluid according to the traction and thrust of the piston in one direction, and the precision of the ease and adjustment according to the adjustment of the traction load and the thrust load of the piston by the pressure control of the fluid rather than the flow rate of the fluid is guaranteed It has a characteristic purpose.

In addition, the present invention provides a compact structure by simplifying the structure of the flow of the fluid is provided in the inner circulation structure instead of the outer circulation structure, and can be applied to all the indoor and outdoor exercise equipment in which the fluid cylinder is used to maximize product compatibility One has a characteristic purpose.

In order to achieve the above object, in the present invention, the incompressible fluid is filled in the cylinder chamber of the double chamber divided into the inner chamber and the outer chamber, which are sealed by the rod cover and the head cover at both sides of the outer tube and the inner tube and are filled with an incompressible fluid. cylinder;

A piston installed in the inner chamber to reciprocate;

A piston rod which is assembled with one side of the piston and protrudes the other side to the outside in an airtight state with the rod cover;

An induction pipe connecting the connection flow path between the rod cover and the head cover to circulate the incompressible fluid of the inner chamber in one direction through the rod cover and the head cover in one direction;

Compressible compensating means including air sealed inside the air accommodating the outer chamber to compensate for the volume change of the piston rod due to the reciprocating motion of the piston;

It is characterized by the configuration.

In addition, the present invention is the piston of the piston rod by the traction of the piston is compressed flow through the inner chamber (towing compression chamber) in the state that the check valve is closed, the inner chamber on the opposite side through the check valve configured in the head cover By supplying to the thrust compression chamber and at the same time the incompressible fluid of the outer chamber is circulated and supplied to the inner chamber (thrust compression chamber), and the compressive compensation means accommodated in the outer chamber expands and compensates for the occupied space occupied by the piston rod. It is characterized by the constant speed and precise running of the piston.

Further, the present invention compresses and flows the inner chamber (thrust compression chamber) in a state in which the check valve of the head cover is closed by the thrust of the piston, so that incompressible fluid is introduced into the inner chamber (towing compression) on the opposite side through the check valve of the piston. The incompressible fluid contracts and compensates the compressible compensating means accommodated in the outer chamber by the volume of the piston rod which is circulated and supplied to the chamber.

In addition, the head cover of the present invention comprises a hydraulic pressure adjusting means for regulating the flow pressure of the incompressible fluid circulating in both the thrust compression chamber and the traction compression chamber and the outer chamber of the inner tube on one side of the pull (pistoning) and It is characterized by the effective exercise of the user by adjusting the force of pushing (thrust).

Hydraulic cylinder for exercise equipment according to the present invention has the following effects.

First, the present invention compensates for the volume change generated during the movement of the piston rod due to the traction and thrust motion of the piston by the contraction and expansion of the compressible compensation means in which the compressible gas (air) housed therein is sealed and expands. It is effective in providing precision and constant speed driving.

Second, the present invention is to compensate for the volume change according to the movement and return of the piston rod to eliminate the cavitation generated by the separation of gas dissolved in the liquid (oil) by preventing the noise and vibration caused by the piston reciprocating motion It is effective to increase the reliability of the product.

Third, the present invention is precisely provided the pressure control of the fluid in accordance with the traction and thrust of the piston has the effect of precise movement according to the user.

Fourth, the present invention is provided in a compact structure has the effect of increasing the convenience of equipment application and compatibility of the product.

Hereinafter, the configuration and operation of the present invention for achieving the above object with reference to the accompanying drawings in detail.

1, 2, and 5 illustrate a hydraulic cylinder assembly for an exercise device of the present invention.

The hydraulic cylinder for the exercise device of the present invention includes a cylinder chamber 100, a piston 200 accommodated in the cylinder chamber, a piston rod 300 to which the piston is assembled, and both sides of the cylinder chamber 100. It has a component of the induction pipe 400 to connect and the compressive compensation means 500 accommodated in the cylinder chamber 100.

The cylinder chamber 100 is divided into an outer chamber 101 and an inner chamber 102 by a rod cover 130 and a head cover 140 in which the outer tube 110 and the inner tube 120 are assembled at both sides. It is formed of a double chamber and filled with an incompressible fluid inside.

At this time, the rod cover 130 and the head cover 140 are coupled to the O-ring (O.R) in the state in which the respective connecting flow paths 131 and 141 are processed to maintain the airtight state.

And the inner tube 120 is inserted into the piston 200 to reciprocate by sliding the inner circumferential surface, the inner chamber 102 is a thrust compression chamber (TPC) is compressed by the forward (pushing) of the piston 200 And a traction compression chamber (APC) that is compressed by retraction (pull).

The piston 200 is assembled by fitting a piston packing (P.K) to the outer peripheral surface to maintain the airtight between the thrust compression chamber (T.P.C) and the traction compression chamber (A.P.C).

The inner tube 120 has the rod cover 130 and the head cover 140 at both sides of the outer tube 110 in a state in which both ends are fitted into the step grooves 132 and 142 respectively processed inside. Are assembled.

That is, the head cover 140 is assembled by screwing to the stepped screw portion 111 of one side of the outer tube 110, the rod cover 130 is also a stepped screw portion processed on the other side of the outer tube (110). The inner tube 120 is tightly fixed between the rod cover 130 and the head cover 140 by screwing the fixing nut 135 screwed to the rear in the state fitted to the (112).

The piston 200 has one side of the piston rod 300 is assembled and the other side through the rod cover 130 and the fixing nut 135 by the O-ring (OR) and the packing (PK) interposed on each inner peripheral surface It protrudes to the outside in airtight condition.

At this time, the outer circumferential surface of the piston rod 300 through the metal ball 136 through the rod hole penetrated through the rod cover 130, the smoothness of the movement of the piston rod 300 and unnecessary passage of the connection flow path 131. The part (vertical working part) is sealed.

As shown in FIG. 10, the piston 200 is configured to provide a flow of incompressible fluid compressed in the thrust compression chamber (TPC) of the inner chamber 102 during the thrusting movement (pushing) of the piston rod 300. The flow path 210 is penetrated, and the check valve 250 to control the flow of the fluid through the one direction is configured.

The check valve 250 is composed of a leaf spring 251 for close contact with one side surface of the flow path 210 and a stop ring 252 for limiting the deformation range of the leaf spring.

The check valve 250 is inserted into the stop ring 252, the leaf spring 251, the piston 200 in order to the stepped screw rod 310 of the piston rod 300, the screw coupling of the tightening nut 253 The leaf spring 260 is assembled in close contact with the flow path 210 by tightening by.

As shown in the enlarged excerpt of FIG. 11, the leaf spring 251 of the check valve 250 has a large compressive force of an incompressible fluid of a thrust compression chamber (TPC) due to the movement of the piston 200, resulting in an incompressible balance. The fluid is adapted to push and flow the leaf spring 251 through the flow path 210 of the piston 200, the deformation caused by the original return of the leaf spring 251 is suppressed by the stop ring 252 do.

In this way, the incompressible fluid that is compressed and flows through the check valve 250 is circulated in one direction of the inner and outer chambers 101 and 102 through the connection passage 141 of the head cover 140.

The induction of the circulation of the incompressible fluid is made by the induction pipe 400 connecting the connection passage 131 of the rod cover 130 and the connection passage 141 of the head cover 140.

Of course, the induction pipe 400 is also assembled in a state in which both ends are fitted in the connecting passages 131 and 141, respectively, like the coupling of the inner tube 120 interposed between the rod cover 130 and the head cover 140. .

In addition, the head cover 140 blocks the flow of incompressible fluid of the thrust compression chamber (TPC) through the connecting pipe 141 of the head cover 140 during the thrust movement of the piston 200, the induction A check valve 260 is installed to open the flow of the incompressible fluid compressed and flown by the pipe 400.

The check valve 260 opens and closes the support cover 261 penetrating a plurality of flow path holes 262 communicating with the connection flow path 141 of the head cover 140 and the flow path hole 262 of the support cover. The leaf spring 263, the compression spring 264 for elastically supporting the leaf spring to close the flow path hole 262, and the E-shaped stop ring 265 for holding and fixing the compression spring in the support cover 261 do.

The compression spring 264 elastically supports the leaf spring 263 as a conical spring and closes the one side surface of the support cover 261 to block the flow path hole 262.

In this case, the connection passage 141 of the head cover 140 is a long hole 145 formed in the horizontal direction so as to connect the inner chamber 102 and the outer chamber 101 at the same time as shown in Figs. Through)

Referring to FIG. 12, the role of the long hole 145 may be due to the pushing operation of the piston 200 of the piston rod 300, that is, the incompressible fluid of the inner chamber 102, that is, the thrust compression chamber TPC. The check valve 260 of the head cover 140 is closed by compression, and the incompressible fluid of the thrust compression chamber (TPC) opens the check valve 250 of the piston 200 by continuous compression of the incompressible fluid. And flows to the inner side chamber 102 of the opposite side, that is, the traction compression chamber APC, and connects the connection passage 131 of the rod cover 130, the guide tube 400, and the connection passage 141 of the head cover 140. Through the long hole 145 of the outer chamber 101 is bound to flow.

The incompressible fluid flow to the outer chamber 101 is possible by the compressible compensation means 500 accommodated in the outer chamber 101 to compensate (decompress) the incompressible fluid that is compressed and flows in the incompressible fluid filled in the enclosed space. Is accommodated to provide forward movement of the piston 200.

6 and 7, as shown in FIGS. 6 and 7, the check valve 250 of the piston 200 is closed by pulling the piston rod 300 and the inner chamber 102 is closed. That is, the incompressible fluid of the traction compression chamber (APC) is compressed and flows, and the incompressible fluid thus compressed is flowed through the connection passage 141 of the head cover 140 through the induction pipe 400.

In this process, while the pressure balance of the inner chamber 102, that is, the thrust compression chamber (TPC) is broken and the incompressible fluid is opened while the check valve 260 of the head cover 140 is opened by the incompressible fluid that is compressed and flows. Compression flow into the chamber (TPC) and at the same time the pressure balance of the outer chamber 101 is broken.

Therefore, the compressible compensating means 500 that has been compressed (contracted) is expanded to its original state, and the incompressible fluid of the compressive volume of the compressible compensating means 500 thrusts through the long hole 145 of the head cover 140. Pressure equalization is achieved by compression flow in a compression chamber (TPC).

That is, the compressibility compensating means 500 is to compensate for the volume change of the piston rod 300 by the reciprocating motion of the piston 200 according to the pushing and pulling of the piston rod 300.

The compressible compensation means 500 provides a flow space (increased volume by the piston rod) of the incompressible fluid that compressively flows to the outer chamber by contraction and return expansion with respect to the compressed flow of the incompressible fluid. In the reciprocating movement of the piston 200 is enabled.

In other words, the present invention provides the movement of the incompressible fluid in the limited container by the compressible compensating means 500, thus eliminating the need for a space where the incompressible fluid can move as in the prior art, thereby minimizing the volume, as well as precision of operation, Accuracy is provided.

As shown in FIG. 3 and FIG. 8, the compressibility compensating means 500 may include a sealed air bag in which a volume change (compression) is possible by a constant pressure and is sealed in a vinyl tube. The compensating means 500 is rolled around the outer circumferential surface of the inner tube 120 to be freely accommodated in the outer chamber 101.

The head cover 140 is connected to the hydraulic flow passage 141 through a plurality of stepped holes 143 in the vertical direction, thereby adjusting the flow of the incompressible fluid that is compressed and flows through the connection flow passage 141. 150) is configured.

The hydraulic control means 150 is a multi-stage stepped hole to open and close the conduit of the connection flow path 141 to adjust the compression force of the incompressible fluid circulated through the induction pipe 400, as shown in Figures 4 and 7 A valve tip 151 assembled to the 143, a nut 152 assembled in an anti-rotation state, a lifting rod 153 which is assembled with the nut and lifted by screw rotation, and the valve tip 151 Compression spring 154 elastically installed between the elevating rod and the lifting rod 153, and the index groove 156 is screw-assembled in the state protruding the lifting rod 153 to support the rotation angle of the lifting rod 153. The index plate 155 is processed, and the control knob 157 assembled on the lifting rod 153 through the ball plunger 158 elastically coupled to the index groove.

The nut 152 is provided with a key groove 152a in the vertical direction, and a spring pin 159 inserted through the key hole 146 and fitted thereto in the upper part of the long hole 145 of the head cover 140 is assembled therewith. It prevents the rotation of the nut 152 to provide a screw rotation of the lifting rod 153.

The upper part of the multi-stage stepped hole 143 is screwed and screwed through the threaded portion of the index plate 155, and the lifting rod 153 is assembled by assembling the O-ring (OR) and the stepped hole 143 Is confidential.

The lifting rod 153 is fixed by a setting screw 157b to a screw groove 157a penetrated in a vertical hole of the adjusting knob 157 and penetrated in the horizontal direction.

And the adjustment knob 157 is assembled with an index plate 157c so that the user can adjust in step (1-8 steps) corresponding to the index groove 156 in one rotation (360) range.

By adjusting the elevating operation of the elevating rod 153 by the step-by-step angular rotation of the control knob 157 to adjust the rising range of the valve tip 151 by adjusting the elastic coefficient of the compression spring 154 of the incompressible fluid Compression force can be controlled.

The core technology of the present invention as described above is the compression (volume change) of the incompressible fluid contained in a limited space (cylinder chamber: 100) by the compressible gas (air) accommodated in the compressible compensation means 500 flow by contraction and expansion return By providing a piston is able to move the piston 200 to push and pull the piston rod 300

That is, the present invention compresses and flows the inner chamber 102 (thrust compression chamber) in a state where the check valve 250 of the head cover 140 due to the thrust of the piston 200 is closed to draw the incompressible fluid into the piston ( Compressibility in which incompressible fluid is accommodated in the outer chamber 101 by the volume of the piston rod 300 which is increased while being circulated and supplied to the opposite inner chamber 102 (towing compression chamber) through the check valve 250 of the 200. It is possible to move forward by compensating by contracting the compensation means 500.

In addition, in the present invention, the piston 200 of the piston rod 300 due to the traction of the piston 200 compresses and flows the inner chamber 102 (towing compression chamber) in a state where the check valve 250 is closed, thereby incompressible fluid. Is supplied to the inner side chamber 102 (thrust compression chamber) on the opposite side through the check valve 260 configured in the head cover 140 and at the same time, the incompressible fluid of the outer side chamber 101 is the inner chamber 102 (thrust). At the same time as being supplied to the compression chamber and the piston rod 300 occupies the occupied space occupied by the compressible compensation means 500 accommodated in the outer chamber 101 is expanded to compensate for the backward movement.

In addition, the head cover 140 of the present invention controls the flow pressure of the incompressible fluid circulating in both side thrust compression chamber (TPC) and traction compression chamber (APC) and the outer chamber 101 of the inner tube 120 on one side. It is possible to precisely adjust the force of pulling (traction) and pushing (thrust) of the piston rod 300 by configuring the hydraulic control means 150 to.

1 is a perspective view of the present invention.

2 is an exploded perspective view of the present invention.

3 is an enlarged view of a part of the extract of FIG.

4 is an enlarged view of a part of the extract of FIG. 2;

Figure 5 is a cross-sectional view of the pulled (traction) state of the piston rod of the present invention.

6 is an enlarged view of a part of the extract of FIG. 5;

FIG. 7 is an enlarged view of a part of the extract of FIG. 6, showing in detail a compression flow of an incompressible fluid in a state in which a check valve of the head cover is opened; FIG.

8 is a longitudinal cross-sectional view of the present invention.

9 is an enlarged view of a part of the present invention, a longitudinal cross-sectional view and a partial cutaway cross-sectional view showing the structure of the head cover.

10 is a cross-sectional view of the pushing (thrust) state of the piston rod of the present invention.

FIG. 11 is an enlarged view of a part of the extract of FIG. 10; FIG.

FIG. 12 is an enlarged view of the extract of FIG. 11, showing in detail the compression flow of the incompressible fluid in a state where the check valve of the head cover is closed;

DESCRIPTION OF REFERENCE NUMERALS

100: cylinder chamber 101: outer chamber

102: inner chamber 110: outer tube

120: inner tube 130: rod cover

131: road cover 140: head cover

141: connection flow path 200: piston

250, 260: check valve 300: piston rod

400: guide tube 500: compressibility compensation means

Claims (5)

A cylinder chamber of a double chamber divided into an inner chamber and an outer chamber, each of which is sealed by a rod cover and a head cover on both sides of the outer tube and the inner tube to fill an incompressible fluid; A piston installed in the inner chamber to reciprocate; A piston rod which is assembled with one side of the piston and protrudes the other side to the outside in an airtight state with the rod cover; An induction pipe connecting the connection flow path between the rod cover and the head cover to circulate the incompressible fluid of the inner chamber in one direction through the rod cover and the head cover in one direction; Compressible compensating means including air sealed inside the air accommodating the outer chamber to compensate for the volume change of the piston rod due to the reciprocating motion of the piston; Hydraulic cylinder for exercise equipment, characterized in that consisting of. The method of claim 1, The piston is a hydraulic cylinder for exercise equipment, characterized in that the plate spring is configured to open and close the plurality of passage holes penetrated through the piston via the check valve consisting of a stop ring, a leaf spring. The method of claim 1, The head cover is assembled at one end of the inner tube on one side of the support cover passing through a plurality of flow paths communicating with the connection flow path of the head cover, a leaf spring for opening and closing the flow hole of the support cover, the elastic support for the leaf spring Hydraulic cylinder for exercise equipment, characterized in that the check valve consisting of a compression spring for closing the passage hole, the E-stop ring for holding the compression spring in the support cover. The method according to claim 1 or 3, The connecting flow path of the head cover is a hydraulic cylinder for exercise equipment, characterized in that it is configured to pass through the long hole formed in the horizontal direction so as to connect the inner chamber and the outer chamber at the same time. The method of claim 1, The head cover processes a multi-stage stepped hole in a direction perpendicular to the connection flow path, and is opened and closed by a compressive force of an incompressible fluid circulated through the induction pipe, a nut assembled to prevent rotation, and the nut and Lifting rod screwed up and down by screw rotation, compression spring elastically installed between the valve tip and the lifting rod, index groove for screwing in the state of protruding the lifting rod to support the rotation angle of the lifting rod Processed index plate, the hydraulic cylinder for exercise equipment, characterized in that the hydraulic control means consisting of a control knob assembled on the lifting rod via the ball plunger elastically coupled to the index groove.

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