KR101266063B1 - Magneto rheological fluid damper with clip - Google Patents

Abstract

PURPOSE: A magneto-rheological fluid damper is provided to combine a rod assembly installed inside a tube integrally by using a clip, thereby enabling the miniaturization, reducing the weight, and simplifying the assembly. CONSTITUTION: A magneto-rheological fluid damper installs a rod assembly inside a tube(20) and the magneto-rheological fluid is built in the rod assembly. In the rod assembly, a first yoke(11), a second yoke(12), a first coil(13), a third yoke(14), a second coil(15), a fourth yoke(16) are installed in an outer circumference of a load(10) from an upper part to a lower part. In the outer periphery of the first yoke, the second yoke, the first coil, the third yoke, the second coil, the fourth yoke, each clip groove(21) is formed on the straight line. Especially in the first yoke and the fourth yoke, the clip groove is bent perpendicularly to form a clip fixing unit to hang a clip end. In the clip groove, a clip(30) is installed to closely bind the rod assembly. The rod assembly is closely bonded if a bent unit of the lower part is inserted to a clip groove which is perpendicularly bent to a right angle downscale of the first or fourth yoke, and a horizontal unit of the upper part is hung in the perpendicular clip groove of the fourth or first yoke which is in the opposite direction.

Description

Magnetic Rheological Fluid Damper with clip

The present invention relates to an MR fluid damper having a clip installed, and more particularly, to an MD fluid damper that integrally couples a rod assembly installed inside a tube using a clip.

In general, a damper is a device that weakens shock or vibration by using an elastic body such as a spring or rubber, and is applied to various technical fields such as a shock absorber, a braking device, and a washing machine of an automobile.

For example, the damper is applied to a conventional drum washing machine, which is installed between a drum support tub and a case bottom provided to support the drum in which the damper rotates in a three-point or two-point manner to absorb vibration and shock during operation of the drum. To be installed.

Such a conventional damper has a frictional structure such that a rod elastically supported by a spring reciprocates a friction pad fixedly installed in the cylinder to attenuate shock or vibration applied to the rod, or damping means such as oil injected into the cylinder. It is configured by the hydraulic so as to effect the impact on the rod by.

However, the conventional hydraulic damper has a problem that the operation noise occurs due to friction with the rod along with environmental pollution by using oil as a damping means, the friction damper also causes the operation noise on the friction pad side of the cylinder . In addition, the hydraulic damper and the friction damper had a problem in that it is impossible to control the damping force.

In order to solve this problem, a technique for efficiently adjusting the damping force using an MR fluid has been described.

MR fluid [Magneto-Rheological is the suspension of micron-sized ferromagnetic particles in a carrier fluid. Flow control with properties similar to automotive lubricants. However, by applying a magnetic field, the fluidity is immediately changed to a state like peanut butter.

Patent Publication No. 10-2008-0011952 describes Continuous Damping Control (hereinafter simply referred to as 'CDC') using a highly functional magnetofluid fluid that responds more quickly to vibrations transmitted from a road surface used in a conventional vehicle. The damper is a synthetic oil containing floating magnetized particles, and the damper using the MR fluid uses a phenomenon in which the apparent viscosity increases when the MR fluid passes through the magnetic field. . That is, when the MR fluid flows into the magnetic field formed by the solenoid, the magnetized particles dispersed in the MR fluid are arranged in a chain structure under the influence of the magnetic field, and thus the damping increases as the yield shear stress of the fluid increases. . Therefore, the damper using the MR fluid can freely control the apparent viscosity and attenuation of the fluid by arbitrarily changing the strength of the magnetic field. Therefore, such a CDC damper using MR fluid can be preferably used in an electronically controlled suspension system.

In addition, Patent Application Publication No. 10-2010-0050382 (Patent Application No. 10-2009-76100), the applicant's prior application, describes a technique for efficiently adjusting the damping force of a damper installed in a washing machine using MR fluid. It is.

1 is a cross-sectional view of a conventional MR fluid damper. As shown in FIG. 1, a general washing machine having a conventional MAL damper has a case 1 ′ having an accommodating space therein, and is disposed along the front and rear directions inside the case 1 ′ to wash water therein. A tub 2 'provided to receive the drum, a drum 3' disposed inside the tub 2 ', and a damper 100 for damping vibration and impact on the tub 2'. It is composed.

Here, the case (1 ') has a rectangular parallelepiped shape with an opening formed in the front to allow the laundry to enter and exit, the door (D) is provided to open and close the opening on one side edge.

The drum 3 'is coupled to be rotatable about a rotation axis formed along the front and rear directions of the case 1', and has a radius to move the laundry upward so that the laundry falls to the bottom. A plurality of lifts are provided which protrude along the direction and extend along the axial direction.

In addition, the upper side of the tub (2 ') is provided with a detergent supply unit (S) to supply detergent, the water supply pipe (P) having a water supply valve to supply the wash water to one side is connected. In addition, a drum driving motor (M) is installed in the rear region of the tub (2 ') so that the drum (3') can be driven to rotate, and a drain flow path (F) for draining the bottom of the tub (2 '). ) And a drain pump DP.

The upper region of the tub 2 'is provided with a plurality of support springs, one end of which is fixed to the case 1' to support the tub 2 ', and a lower portion of the tub 2' is provided in the vertical direction of the tub 2 '. A damper is provided to reduce vibrations or loads along the line.

The damper 100 has a cylinder 110 having one end fixed to the tub 2 ', and one side penetrated into the other end of the cylinder 110 to be reciprocated, and the other end of the case 1 ') A rod 120 fixed to an inner side surface, and elastic means 130 installed between the other end of the cylinder 110 and the other end of the rod 120 to elastically support the other side of the rod 120; , A structure including a plurality of solenoid coils 140 to attenuate the load or vibration with a combination of various magnetic forces.

The cylinder 110 is connected to the lower side of the tub 2 'by the cap bolt 111, and the rod 120 is connected to the bottom of the inner surface of the case 1' by the end bolt 121. Fixed installation

In addition, one end of the rod 120 is mounted by riveting the piston 122 in contact with the inner circumferential surface of the cylinder 110 to improve operability through the O-ring (122a), bearing a plurality of one side Inner guides 123 supporting and guiding with (B) are arranged to be spaced at a predetermined interval.

The piston 122 has a through hole formed in the moving direction thereof to reduce the vibration or load acting on the rod 120 while passing the air pressure existing inside the cylinder 110 to the inside and the outside thereof.

In addition, a protrusion 124 is provided in the middle of the rod 120 to selectively contact one side surface of the spring seat 131 to be described later to limit the movement of the rod 120 together with the piston 122. Will be.

The elastic means 130 is a spring sheet 131, the other end of the cylinder 110 is press-fitted, one side is seated on the spring sheet 131 so as to be equal to the other end of the cylinder 110 elastically compressible coil A spring 132 and a spring washer 133 which is spaced apart from the spring sheet 131 by a predetermined distance to support the other side of the coil spring 132 and support the other side of the rod 120.

A non-woven fabric (not shown) is interposed between the spring sheet 131 and the other end of the cylinder 110 to block noise that may occur during vibration, and the other end of the cylinder 110. It is press-fit to the spring sheet 131 in a state of being installed on the circumferential surface.

In particular, the plurality of solenoid coil 140 is interposed on the outer circumferential surface of the cylinder 110 corresponding to the rod 120, but the load applied to the rod 120 or

The magnetic force is generated by the terminal T and the terminal socket TS, which selectively input external power according to the vibration, and the surface thereof is installed as surrounded by the insulator 141 to prevent loss of magnetic force and short circuit. .

Reference numeral '125', which is not described above, is a rod guide, and '126' is installed between the rod guide 125 and the inner guide 123, and is provided with a pocket for supplying hydraulic oil of the rod 120. It is an oil seal.

Hereinafter, the operation of the washing machine having the above-described magnetic damper will be described.

When power is supplied to the washing machine for washing or dehydration, a sensor for detecting vibration or load applied to the damper 100 of the present invention detects this, and according to a result of the detection, a plurality of control signals of the controller are not shown. Power supply to the solenoid coil 140 is controlled.

To this end, the controller preferentially calculates a resistance value capable of attenuating vibration or load applied to the rod 120 in real time through an internal computing device. The control unit selectively controls the power supply to the plurality of solenoid coils 140 according to the operation value, thereby controlling the power supply to the single solenoid coil 140 or the plurality of solenoid coils 140.

That is, assuming that the three solenoid coils 140 shown can generate the strengths of the currents of 0.15A, 0.5A, and 2.0A, respectively, the damper 100 through the damping force by the respective solenoid coils 140. Of course, it is possible to reduce the vibration or load to be applied to the solenoid coil 140 of 0.15A and 0.5A is supplied with power to generate a magnetic strength of 0.65A, the damping force can be further increased. .

In addition, when the solenoid coil 140 having 0.15A and 2.0A is combined, the solenoid coil 140 may have a damping force of 2.15A, and the combination of three solenoid coils 140 may have a maximum damping force of 2.65A. Supply may be made.

Accordingly, the damper 100 is primarily damped by the coil spring 132, and is damped by the combined damping force by the plurality of solenoid coils 140 and the residual air pressure inside the cylinder 110. Vibration and shock are reduced during operation.

As such, a washing machine having a magnetic damper according to an embodiment generates different damping forces according to a combination of magnetic forces, thereby preventing environmental pollution and operation noise caused by a conventional hydraulic or friction damper, and preventing vibration and shock. Effective transmission attenuation can be achieved.

However, the conventional technologies are dampers because the coil of the ML fluid damper and the coil on and off by electricity and the MR fluid which becomes magnetic by the coil are not embedded concentrically about the axis but spaced apart from each other in the axial direction. The assembly was inconvenient, the assembly time is long, the injection of MR fluid is complex and inconvenient, and the effect of reducing the resonance and noise of the device equipped with the damper by adjusting the damping force in accordance with the situation is inferior.

In other words, there was no method for injecting MR fluid between the rod and the coil, and there was no way to separate the leader wire of the coil from the out cylinder when final assembly of the damper. there was.

     Accordingly, the present applicant has improved this problem, and has applied for the Patent Application Publication No. 10-2010-0065264 (Application No. 10-2010-0050371), which changes the strength of the magnetic field in the out cylinder 1 to adjust the damping force. The rod 12 is installed, but between the out cylinder 1 and the axial radius direction of the rod 12 is provided with a coil 8 is turned on and off by electricity, the magnetic coil by the coil (8) The MR fluid is embedded between the coil 8 and the rod 12 in the axial radius direction, and the fourth yoke 3, the bush 4, the oil seal 5, and the third to seal the MR fluid. Yoke (6), O-ring (7), coil (8), O-ring (7), second yoke (9), O-ring (7), coil (8), O-ring (7), first yoke (10), oil The seal 5, the bush 4, the friction ring 11 and the case 13 are sequentially installed in the axial direction, one end of the jig supports the case and the other end of the jig is fixed by a nut. Therefore, the jig-type MR fluid damper has the effect of reducing the resonance and noise of the device in which the damper is mounted, but the inconvenience of having to mount the jig during manufacturing, therefore, by installing a tube and a rod assembly by a separate jig The bulky, heavy weight, assembly is also inconvenient, and the cost of the material was increased due to excessive material costs due to the jig production remained.

Therefore, the present invention has been made to solve the above problems, it is possible to miniaturize, to reduce the weight, easy to assemble, and also to provide an M fluid damper with a clip is installed to reduce the cost of material costs are low. will be.

The present invention relates to an MR fluid damper having a clip, in the M fluid damper is provided with a clip 30 is installed in the tube 20 so that the rod 10 is reciprocating up and down, the inside of the tube 20 The assembly is fixedly installed, and the rod assembly has an MD fluid is built in the damping force generated by the MR fluid in the rod of the rod assembly, the rod assembly is the first yoke (11), the second on the outer periphery of the rod (10) The yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16 are sequentially installed from the top to the bottom, and the first yoke 11 ), The second yoke 12, the first coil 13, the third yoke 14, the second coil 15, the fourth yoke 16, the outer peripheral surface of the clip groove 21 is formed and the clip groove The clip 30 is installed on the 21 and is characterized in that the rod assembly is tightly bound.

Therefore, the present invention can be miniaturized, it is possible to reduce the weight, easy to assemble, and there is a significant effect that the cost is reduced due to the low material cost.

1 is a cross-sectional view of a typical washing machine in which a conventional damper is installed
Figure 2 is an enlarged cross-sectional view of the damper of Figure 1
3 is a magnetic damper assembly diagram of another conventional embodiment
Figure 4 is a liquid fluid damper assembly with the present invention clip installed
Figure 5 is an explanatory view of the injection of the MR fluid with a syringe through the yoke injection groove of the MR fluid damper is installed clip of the present invention and the clip state before mounting
6 is an explanatory view of the yoke of an MR fluid damper provided with the present invention clip;

The present invention relates to an MR fluid damper having a clip, in the M fluid damper is provided with a clip 30 is installed in the tube 20 so that the rod 10 is reciprocating up and down, the inside of the tube 20 The assembly is fixedly installed, and the rod assembly has an MD fluid is built in the damping force generated by the MR fluid in the rod of the rod assembly, the rod assembly is the first yoke (11), the second on the outer periphery of the rod (10) The yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16 are sequentially installed from the top to the bottom, and the first yoke 11 ), The second yoke 12, the first coil 13, the third yoke 14, the second coil 15, the fourth yoke 16, the outer peripheral surface of the clip groove 21 is formed and the clip groove The clip 30 is installed on the 21 and is characterized in that the rod assembly is tightly bound.

     In addition, a snap ring 19 is mounted on an upper end of the rod 10 in the tube 20 to prevent the first yoke 11 from escaping upward, and the first yoke 11 and the second yoke 12. The first oil chamber 42 is installed therebetween, and the second and third oil chambers 43 and 44 are sequentially installed between the fourth yoke 16 and the case, and the second yoke 12 is also provided. ) O-ring 41 is installed between the first coil 13 and the O-ring 41 is also installed between the second coil 15 and the fourth yoke 16 so that the M fluid in the rod assembly is moved to the outside. It is characterized in that it is airtight so as not to leak.

     In addition, the second and fourth yoke 12 and 16 are characterized in that the same shape.

     In addition, a lower cap bolt 40 is mounted on an upper end of the tube 20, a case 17 is mounted on a lower end of the tube 20, and a tube cap 18 is mounted on the case 17. It is characterized by.

     In addition, a spring seat 50 is mounted at the bottom of the rod 10, and an end bolt 60 is mounted at the bottom of the spring seat 50, and the tube cap 18 and the rod at the bottom of the tube 20 are loaded. (10) It is characterized in that the coil spring 70 is installed between the spring seat 50 is mounted on the bottom.

In addition, injection grooves 81 are formed in the inner diameters of the second yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16. Through the groove 81, MR fluid is characterized in that the injection.

The present invention will be described in detail with reference to the accompanying drawings. 1 is a cross-sectional view of a conventional washing machine in which a conventional damper is installed, FIG. 2 is an enlarged cross-sectional view of the damper of FIG. 1, FIG. 5 is an explanatory view of injecting the M fluid with a syringe through the yoke injection groove of the M fluid damper is installed clip of the present invention and the clip state before mounting, Figure 6 is a yoke description of the M fluid damper is installed It is also.

          In the present invention, the rod assembly is fixedly installed in the tube 20, and the MD assembly is embedded in the rod assembly, and a damping force is generated by the MR fluid on the rod of the rod assembly.

     The rod assembly includes a first yoke 11, a second yoke 12, a first coil 13, a third yoke 14, a second coil 15, and a fourth yoke on the outer circumference of the rod 10. 16) are installed sequentially from the top to the bottom.

     In addition, clip grooves are formed on the outer circumferential surfaces of the first yoke 11, the second yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16, respectively. 21 is formed in a straight line, and in particular, the first yoke 11 and the fourth yoke 16 form a clip fixing portion to be able to hook the clip end at right angles. The clip 30 is installed in the clip groove 21 to closely bind the rod assembly. The plurality of clip grooves and clips can be radially installed on the outer circumference of the yoke and coil, and about three are appropriate. A semicircular wire passing groove is formed on the outer circumference of the yoke and coil so that the wire can pass therein (coil is formed with a clip groove and a wire passing groove on the outer circumferential surface of both ends of the bobbin wound with the coil).

’형상이며, 먼저 하부의 절곡부를 제1또는 4요크의 직각하방으로 꺽인 수직 클립홈에 끼우고, 상부의 수평부를 반대방향인 제4 또는 제1 요크의 수직 클립홈에 걸게 되면 로드조립체가 긴밀히 결합된다. 상기 클립 재질은 열처리된 탄성력이 있는 강판을 사용된다. 한편, 상기 클립은 장착전에는 길이방향으로 구부러지게 형성함으로써 요오크에 결합뒤에는 직선상태가 되므로, 탄성복원력에 의해 더욱 긴밀하게 이탈되지 않고 결합되게 할 수 있다.
The shape of the clip has a cross section

First, the lower bent part is inserted into a vertical clip groove bent at right angles to the first or fourth yoke, and when the upper horizontal part is hooked to the vertical clip groove of the fourth or first yoke in the opposite direction, the rod assembly is closely Combined. The clip material is a heat-treated elastic steel sheet is used. On the other hand, since the clip is bent in the longitudinal direction prior to mounting it becomes a straight state after coupling to the yoke, it can be coupled without being separated more tightly by the elastic restoring force.

     In addition, a snap ring 19 is mounted on an upper end of the rod 10 in the tube 20 so that the first yoke 11 is not separated upward. The first oil chamber 42 is installed between the first yoke 11 and the second yoke 12, and the second and third oil chambers 43 and 44 are also disposed between the fourth yoke 16 and the case. These two are installed sequentially.

     In addition, an O-ring 41 is installed between the second yoke 12 and the first coil 13, and an O-ring 41 is also installed between the second coil 15 and the fourth yoke 16 to provide an airtight action. Characterized in that.

     The second and fourth yokes 12 and 16 are manufactured in the same shape. When the rod assembly and the tube are combined, the rod assembly is inserted into the tube and the outer surface of the tube is compressed by a mechanism (so-called 'rolling operation') so that a portion of the outer surface of the tube is concave. Since the convex portion is formed inwardly, the convex portions of the tube are caught by the concave portions of the rod assembly, so that the rod assembly is tightly fixed without moving inside the tube.

     Meanwhile, a lower cap bolt 40 is mounted on the upper end of the tube 20, a case 17 is mounted on the lower end of the tube 20, and a tube cap 18 is mounted on the case 17. . Meanwhile, the lower cap bolt is installed at the bottom of the apparatus, and in the case of drum washing, the drum is disposed inside the case and connected to the lower portion of the tub provided to accommodate the wash water.

     In addition, the coil spring can be separately installed to assist the damping force by the MAL fluid, the lower end of the rod 10 is mounted with a spring seat 50, the lower end of the spring seat 50 end 60 (60) ) Is mounted, and the coil spring 70 may be installed between the tube cap 18 at the bottom of the tube 20 and the spring seat 50 mounted at the bottom of the rod 10. On the other hand, the bottom end bolt is fixed to the bottom surface of the washing machine case in the case of a drum washing machine.

     In addition, an injection groove 81 for injecting an MR fluid is provided in the inner diameters of the second yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16. It is formed through the injection groove 81, to inject the MR fluid. As soon as the Ml fluid is sufficiently filled in the syringe, the Ml fluid damper is erected vertically from the ground, and when the Ml fluid is injected into the injection groove of the second yoke, the Ml fluid is gradually filled from the bottom.

According to the method as described above, air is easily released from the lower part of the fluid, and the MAL fluid is injected smoothly. After that, if the oil seal, the third yoke and the snap ring are sequentially installed, the MR fluid is sealed so that it does not flow out. As a result, the MR fluid is filled between the first oil chamber and the third oil chamber in the rod longitudinal direction, which is the vertical movement direction, and the second yoke, the first coil, and the third yoke which are the rod outer diameter and the rod assembly in the rod radial direction. And filling between the inner diameter of each of the second coil and the fourth yoke.

     Therefore, the present invention can be miniaturized, it is possible to reduce the weight, easy to assemble, and there is a significant effect that the cost is reduced due to the low material cost.

10: load 20: tube
11: first yoke 12: second yoke
13: 1st coil 14: 3rd yoke
15 coil 2: 16 yoke
17 case 18 tube cap
30: clip 40: lower cap bolt
41: O-ring 42: Oil Room 1
43: oil chamber 2 44: oil chamber 3
19: Snap ring 21: Clip groove
22: wire passing groove
50: spring seat 60: end bolt
70: coil spring 81: injection groove
82: electric wire 83: electric connector

Claims (6)

In the M fluid damper provided with a clip 30 is installed in the tube 20 so that the rod 10 can be reciprocated up and down, the rod assembly is fixed to the inside of the tube 20, the M fluid is installed in the rod assembly Damping force is generated in the rod of the rod assembly by the MR fluid, each of the clip groove 21 is formed on the yoke and coil outer peripheral surface of the rod assembly and the clip 30 is installed in the clip groove 21 MR fluid damper with clip installed, characterized in that the rod assembly is tightly coupled The rod assembly of claim 1, wherein the rod assembly includes a first yoke 11, a second yoke 12, a first coil 13, a third yoke 14, and a second coil 15 at an outer circumference of the rod 10. , The fourth yoke 16 is sequentially installed from the top to the bottom, and furthermore, the first yoke 11, the second yoke 12, the first coil 13, the third yoke 14, the second Clips 21 are provided on the outer circumferential surface of the coil 15 and the fourth yoke 16, respectively, and clip clips 21 are installed in the clip grooves 21 to closely bind the rod assembly. MR Fluid Damper According to claim 2, The rod 10 in the tube 20 is mounted on the upper end of the snap ring 19, so that the first yoke (11) is not separated upward, the first yoke 11 and the second The first oil chamber 42 is installed between the yoke 12, and the second and third oil chambers 43 and 44 are sequentially installed between the fourth yoke 16 and the case. An o-ring 41 is installed between the second yoke 12 and the first coil 13, and an o-ring 41 is also installed between the second coil 15 and the fourth yoke 16 to allow the M-R in the rod assembly. The fluid fluid damper is installed so that the fluid does not leak to the outside, and the second, fourth yoke (12, 16) is the same shape The lower cap bolt 40 is mounted on the upper end of the tube 20, the case 17 is mounted on the lower end of the tube 20, and the tube cap 18 is mounted on the case 17. MR fluid damper is installed, characterized in that the clip is mounted The lower end of the rod 10 is mounted with a spring seat 50, the lower end of the spring seat 50 is mounted with an end bolt 60, the tube cap (lower end of the tube 20) 18) between the spring seat 50 is mounted to the bottom of the rod 10, the coil spring 70 is installed, the MR fluid damper is installed clip The inner groove of the second yoke 12, the first coil 13, the third yoke 14, the second coil 15, and the fourth yoke 16 has an injection groove 81. MR fluid damper having a clip is installed, characterized in that through the injection groove 81, to inject the MR fluid

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