Hydraulic Cylinder

专利摘要:
PURPOSE: A piston protecting member is provided to protect the piston, and a foreign matter is prevented in a sealing portion of the cylinder. CONSTITUTION: A cylinder(110) of a hydraulic device is composed an inner diameter portion of a circular shape, a hydraulic pressure supplying line, and another hydraulic pressure supplying line connected to a rear end of the inner diameter portion. A cap(140) seals an open part of the cylinder having a sealing portion in the center. Hydraulic pipes(151,152) supplies hydraulic pressure to the hydraulic pressure supplying line. A piston(120) has an expanding portion in the inner diameter portion having a hook type connecting portion(122). A guide member(130) is fitted to an outer circumference of the cylinder connected to an end of the piston.
公开号:KR20030060188A
申请号:KR1020020000730
申请日:2002-01-07
公开日:2003-07-16
发明作者:진랑규
申请人:진랑규；
IPC主号:

专利说明:

Hydraulic mechanism {Hydraulic Cylinder}
[16] The present invention relates to a hydraulic mechanism, and more particularly, the surface of the hydraulic piston is protected by improving the structures of the hydraulic cylinder and the hydraulic piston of the hydraulic mechanism, and the hydraulic piston is characterized in that the rotation is prevented with respect to the hydraulic cylinder. will be.
[17] In general, the hydraulic mechanism (1) is composed of a cylindrical cylinder (11), as shown in Figure 1 and the piston 12 is inserted into the extendable extendable, the rear end of the piston (12) the cylinder (11) An extension part 12a to be advanced and retracted along the inner wall of the cylinder 12 and a seal part 12b fitted to the extension part are formed, and an inner diameter of the distal end portion of the cylinder 11 is provided with a sealing part 11a to prevent hydraulic leakage. Each of the hydraulic supply pipes 13 and 14 is provided at the front end and the rear end.
[18] When the hydraulic pressure is supplied to the front end hydraulic supply pipe 13, the conventional hydraulic mechanism 1 is pushed backward by the expansion part 12a of the piston 12, and the hydraulic pressure is supplied to the rear end hydraulic supply pipe 14. When supplied, the extension part 12a of the piston 12 is pushed forward to move forward.
[19] First, the piston 12 has to have a high surface precision so that airtightness with the sealing portion 11a can be maintained, so that hydraulic pressure does not leak.
[20] However, since the piston 12 frequently enters and leaves the outside, the surface of the piston 12 is easily damaged, and when the microscopic damage occurs, the hydraulic pressure leaks. In addition, foreign matters on the surface of the piston 12 are piston 12. When inserted into the sealing portion (11a) during the insertion process of the sealing portion is inferior because the airtightness is lost.
[21] Therefore, a protective means suitable for protecting the surface of the piston 12 and preventing the ingress of foreign matter is required.
[22] Second, the piston 12 is drawn out from the cylinder 11, but has a stroke length of minimum withdrawal and maximum withdrawal, the greater the length of the drawer is closer to the interval between the support point force acting on the interruption of the entire length Weak support for
[23] That is, in the hydraulic mechanism 1 as shown in FIG. 1, the bearing force acts by the expansion part 12a of the piston 12 located inside the cylinder 11 and the sealing part 11a of the inner diameter of the distal end of the cylinder 11. As shown in Fig. 2, the smaller the distance L between them, the weaker the force acting on the interruption.
[24] In order to solve this problem, it is best to leave the bearing capacity using a dimension larger than the original nominal dimension to use the hydraulic mechanism, but this is not preferable considering the price of the hydraulic mechanism.
[25] Third, in the conventional hydraulic mechanism 1 as described above, the piston 12 rotates because it is free with respect to the circumferential direction of the shaft in the state of being inserted into the cylinder 12.
[26] For this reason, when applied and used as shown in Figure 3 does not have a perfect support force and the life is shortened.
[27] That is, in the case of Figure 3 is an embodiment of the hydraulic mechanism (1) used to lift the bucket in the skid loader (2), there is no problem when the skid loader raises the bucket in a horizontal state, but the skid loader (2) When the bucket 21 is lifted high in a state in which the) is tilted left and right, the direction of action of the force does not act in the direction of the extension of the end action point 1a and the body support point 1b of the hydraulic mechanism 1, Since it acts with an angle (as much as the skidder is inclined), it is hard to apply to the end working point 1a part of the hydraulic mechanism 1, the body support point 1b part, and the sealing part 11a of the cylinder 11. Occurs, which shortens the life of the hydraulic mechanism.
[28] The present invention has been made to solve the above-mentioned conventional problems, the main object of the invention is to provide a piston protection means to protect the piston surface of the hydraulic mechanism, as well as the foreign matter caught in the sealing portion of the cylinder. Second, to provide an additional support means using the structure of the piston protection means to improve the bearing capacity as possible even if the gap between the sealing portion of the cylinder and the expansion portion of the piston is close, third, By using the structure of the piston protection means to control the piston so that the rotation is not free to the cylinder to try to make the force act as little as possible to the sealing portion.
[29] A characteristic constitution of the present invention for achieving the above objects is to dig the inside of the rod having a rectangular cross section from the tip side to the cylindrical diameter to the inner diameter portion, and the hydraulic supply passage connected to the tip side of the cylindrical inner diameter portion, A cylinder made of another hydraulic supply passage communicating with the rear end side of the cylindrical inner diameter portion; A cap for sealing the tip opening of the cylinder and having a sealing portion at the center thereof; A hydraulic supply pipe for supplying hydraulic pressure to the hydraulic supply path of the cylinder, respectively; A piston fitted in the cylindrical inner diameter of the cylinder, the piston passing through the center of the cap, the piston having an annular connection at its tip; A rectangular guide member 130 fitted to the outer circumferential surface of the cylinder 110 and having a fitting portion 131 so that the front end thereof can be fastened to the front end connecting portion 122 of the piston 120; The guide member moves forward and backward together as the piston moves forward and backward so as to exert its supporting force.
[1] 1 is a perspective view showing a conventional hydraulic mechanism
[2] Figure 2 is a sectional view of the main part showing a conventional hydraulic mechanism
[3] Figure 3 is an illustration of a conventional hydraulic mechanism using state
[4] Figure 4 is a perspective view of the hydraulic mechanism of the present invention
[5] 5 is a cross-sectional view showing a hydraulic mechanism of the present invention.
[6] 6 is a cross-sectional view taken along the line A-A of FIG.
[7] 7 is a cross-sectional view taken along the line B-B of FIG.
[8] 8 is a cross-sectional view showing the configuration of another embodiment of the present invention
[9] <Code Description of Main Parts of Drawing>
[10] 100: hydraulic mechanism 110: square cylinder
[11] 111: inner diameter 112,113: hydraulic supply path
[12] 114: groove 120: piston
[13] 121: expansion portion 122: annular connection portion
[14] 130: guide member 131: uneven portion
[15] 140: cap 141: sealing part
[30] Hereinafter, the detailed configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.
[31] 4 is a perspective view of a hydraulic mechanism showing an embodiment of the present invention.
[32] The configuration of the present invention is composed of a large new cylinder 110, the piston 120, and the guide member 130 is integrated into the piston.
[33] The cylinder 110 is a cylinder having a rectangular cross-section from the tip side to the cylindrical end to the inner diameter portion 111, and the hydraulic supply passage 112 communicated to the front end side of the cylindrical inner diameter portion 111, It is made of another hydraulic supply passage 113 communicated to the rear end side of the cylindrical inner diameter 111.
[34] And the cylinder 110 is assembled to the cap 140 to seal the opening on the tip side, the cap 140 is to hold the sealing portion 141 in the center, the hydraulic supply path ( 112 and 113 are connected with hydraulic supply pipes 151 and 152 for supplying hydraulic pressure, respectively.
[35] The piston 120 has an expansion portion 121 that fits into the cylindrical inner diameter 111 of the cylinder 110, the suspension passes through the center of the cap 140, the end of the conventional connecting ring It has a connection portion 122.
[36] The guide member 130 is processed in the form of a square pipe to fit snugly to the outer circumferential surface of the cylinder 110, the tip is fixed to the tip of the piston (120). This is as shown in Figures 4 and 5, when fixing to the tip as described above is to make a fitting portion () of the form surrounding both sides of the connecting portion () to fasten this portion together.
[37] The present invention configured as described above, the operation of the piston 120 in the longitudinal direction of the cylinder 110 as a hydraulic mechanism is similar to the conventional operation.
[38] As shown in FIG. 5, when the hydraulic pressure is supplied to the upper hydraulic supply pipe 151, the hydraulic pressure is supplied to the outside of the expansion part 121 of the piston 120 through the hydraulic supply path 112 formed up to the front end portion of the piston 120. ) Is retracted, and when the hydraulic pressure is supplied to the lower hydraulic supply pipe 152, the hydraulic pressure is supplied to the inside of the piston 120, the expansion portion 121 through the hydraulic supply passage 113 formed only to the rear end of the piston ( 120 is advanced.
[39] As such, when the piston 120 moves forward or backward, the guide member 130 moves forward and backward along the piston 120. The inner diameter of the guide member 130 is equal to the outer diameter of the cylinder 110. It is closely aligned so that the four sides slide in the state of surface contact.
[40] On the other hand, the guide member 130 of the present invention can be more firmly supported by forming the uneven portion as shown in FIG.
[41] That is, the cylinder 110 forms a groove 114 in the longitudinal direction on any one surface or two or more surfaces thereof, and the guide member 130 is adapted to the dimensions and the number of the grooves 114 of the cylinder. If the uneven portion 131 is formed, it can slide more firmly when sliding in the longitudinal direction.
[42] And in the present invention, the square cylinder 110 and the guide member 130 of the square pipe shape is not necessarily square but has the same effect even if formed in any cross-sectional shape that prevents rotation such as a triangular, pentagon, octagon, etc. to be.
[43] According to the guide member 130 of the present invention operates as described above, the outer circumferential surface of the piston 120 is prevented from being exposed to the outside, so even when other objects collide with each other during the forward / reverse operation, the piston 120 has a high surface precision. The outer circumferential surface is not damaged, and foreign matter cannot enter the sealing portion 141.
[44] In addition, even if the piston 120 is drawn out to the maximum length, the hydraulic mechanism 100 of the present invention contacts the outer rectangular guide member 130 in close contact with the outer circumferential surface of the rectangular cylinder 110. It has a three-point support structure including the expansion portion 121 and the sealing portion 141 of the piston 120, thus maintaining a more stable state.
[45] In addition, the hydraulic mechanism 100 of the present invention is assembled with a square cylinder 110, and a guide member 130 that slides while being fitted to the outer circumferential surface, the guide member 130 of the piston 120 Since it is fixed to the front end, the piston 120 cannot rotate while being fitted to the cylinder 110. Therefore, even if the force does not act on the extension line of the supporting point and the operating point of the hydraulic mechanism and acts in the transverse direction at the interruption, the sealing portion 141 of the cylinder 110 does not become excessive.
[46] The hydraulic mechanism of the present invention as described in detail above is composed of a cylinder and a piston fitted therein, wherein the outer shape of the cylinder is square, and a guide member having a cross section of a square pipe shape fitted to the outer shape of the cylinder is assembled together. Afterwards, the guide member is secured together with the tip of the piston, thereby protecting the precise outer circumferential surface of the piston and preventing the ingress of foreign matter, thereby fundamentally preventing the cause of hydraulic leakage.
[47] In addition, when drawn out to the maximum length, since the expansion member of the piston, and the guide member fitted to the outside in addition to the sealing portion of the cylinder exerts a bearing force, there is an advantage that can be more firmly held.
[48] And, because the piston is not rotated due to the square cylinder and the guide member fitted to the outside, even if the hydraulic mechanism is inclined, the internal sealing portion does not strain even if the hydraulic mechanism is inclined so that the failure is long and the life is long. To provide advantages in many ways.

权利要求:
Claims (2)
[1" claim-type="Currently amended] The inside of the bar having a rectangular cross section is excavated from the tip side into a cylindrical shape to the inner diameter part 111, and the hydraulic supply path 112 connected to the front end side of the cylindrical inner diameter part 111, and the cylindrical inner diameter part 111. Cylinder 110 consisting of another hydraulic supply path 113 connected to the rear end side of the;
A cap 140 that seals the tip side opening of the cylinder 110 and holds the sealing portion 141 at the center thereof;
Hydraulic supply pipes 151 and 152 for supplying hydraulic pressure to the hydraulic supply paths 112 and 113 of the cylinder 110, respectively;
Piston 120 having an extended portion 121 is inserted into the cylindrical inner diameter 111 of the cylinder 110, the interruption passes through the center of the cap 140, and has an annular connecting portion 122 at the tip ;
A rectangular guide member 130 fitted to the outer circumferential surface of the cylinder 110 and having a fitting portion 131 so that the front end thereof can be fastened to the front end connecting portion 122 of the piston 120; Composed of
And the guide member moves forward and retracts together as the piston moves forward and backward so as to exert its supporting force.
[2" claim-type="Currently amended] The method of claim 1,
The cylinder 110 is to form a groove 114 in the longitudinal direction on one side of the outer surface, the guide member 130 is formed in the longitudinal direction by forming the uneven portion 131 to match the groove 114 of the cylinder Hydraulic mechanism characterized in that it is made so that there is no shaking when sliding.

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同族专利:

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公开号 | 公开日

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KR100466744B1|2005-01-24|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-01-07|Application filed by 진랑규

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2002-01-07|Priority to KR20020000730A

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2003-07-16|Publication of KR20030060188A

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2005-01-24|Application granted

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2005-01-24|Publication of KR100466744B1

优先权:

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申请号 | 申请日 | 专利标题

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KR20020000730A|KR100466744B1|2002-01-07|2002-01-07|Hydraulic Cylinder|