JP7292137B2 - Sleeve pull-out jig - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sleeve extracting jig for extracting a sleeve from a body in which the sleeve is fitted.

Hydraulic elevators are equipped with flow control devices that control the amount of oil delivered. The flow control device includes a sleeve and a piston sliding inside the sleeve. The sleeve fits over the body of the flow control device. Also, the sleeve is pulled out from the main body of the flow control device for periodic replacement during maintenance and inspection work. Patent Literature 1 discloses a sleeve extracting device for extracting a sleeve from a cylinder block in which the sleeve is fitted.

JP-A-62-94277

The sleeve pull-out device disclosed in Patent Document 1 can only pull out a sleeve with a predetermined diameter. Further, the sleeve extracting device disclosed in Patent Document 1 can only extract a substantially cylindrical sleeve.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sleeve pull-out jig that can pull out a sleeve regardless of the diameter or shape of the sleeve.

A sleeve extracting jig according to the present invention is a sleeve extracting jig for extracting a sleeve from a body fitted with a sleeve having an annular convex portion formed along the inner periphery or having a plurality of holes formed on the side peripheral surface. a puller having a pull-out substrate arranged outside an end surface of a main body, and at least two support shafts, one end of which can abut against the end surface of the main body and the other end of which is screwed into the pull-out substrate; , which are arranged in the sleeve along the radial direction of the sleeve, are capable of engaging both ends with projections or holes by expanding and contracting in the radial direction, and have sufficient rigidity against bending in the axial direction of the sleeve. It is characterized by comprising a sleeve grip, and a connecting shaft having one end supporting the sleeve grip, the other end penetrating the drawing board and having a fixing nut screwed to the other side of the drawing board.

In the sleeve pull-out jig according to the present invention, the sleeve grip is configured to be able to expand and contract by sliding the inner cylinder with respect to the outer cylinder inside the outer cylinder, and inside the inner cylinder, a rack is mounted on the shaft of the inner cylinder. Fixed along the direction, one end of the connecting shaft is provided with a pinion that meshes with the rack, and the connecting shaft preferably expands and contracts the sleeve clamp by rotating around the axis of the connecting shaft.

A sleeve pull-out jig according to the present invention is a sleeve pull-out jig that pulls out a sleeve from a main body in which a sleeve having an annular protrusion formed along the inner circumference is fitted, and is arranged outside the end face of the main body. a puller having a pull-out base plate and at least two support shafts, one end of which can abut against the end surface of the main body and the other end of which is screwed into the pull-out base plate; , is supported in the sleeve so as to be tiltable with respect to the radial direction of the sleeve, is tilted in the radial direction within the sleeve to climb over the projections, and can engage both ends with the projections in a state parallel to the radial direction. and a sleeve grip having sufficient rigidity against bending in the axial direction of the sleeve, one end supporting the sleeve grip, the other end passing through the drawing board, and the other side of the drawing board being screwed with a fixing nut. and a connecting shaft.

According to the sleeve extracting jig according to the present invention, the sleeve can be extracted regardless of the diameter or shape of the sleeve.

FIG. 2 is a cross-sectional plan view showing the drawing jig of the present embodiment; The front view which shows the board|substrate which is pulled out of the pulling jig|tool of this embodiment. (a) A front view and (b) a front view in a partial cross-section showing the gripping of the sleeve by the pull-out jig of the present embodiment. FIG. 4 is a schematic diagram showing the flow of a sleeve drawing operation using the drawing jig of the present embodiment. FIG. 10 is a cross-sectional plan view showing a drawing jig according to another embodiment; The plane sectional view which shows the extraction jig|tool of another embodiment.

An example of an embodiment will be described in detail below with reference to the drawings. Since the drawings referred to in the embodiments are schematically illustrated, the dimensions of the components drawn in the drawings should be determined with reference to the following description. In the present specification, the description of "approximately" is intended to include not only completely identical but also substantially identical when explained by taking approximately identical as an example. The embodiment described below is an example, and the sleeve drawing jig of the present invention is not limited to this.

The shapes, materials, and numbers described below are examples for explanation, and can be changed as appropriate according to the specifications of the sleeve drawing jig. In the following description, the same reference numerals are assigned to the same elements in all the drawings. Also, in the explanation in the text, the reference numerals mentioned before are used as necessary.

In the following description, when the sleeve is attached to the sleeve, the side from which the sleeve is pulled out is referred to as the front side, and the side opposite to the front side is referred to as the rear side in the axial direction of the sleeve.

The extraction jig 100 will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 is a plan cross-sectional view showing a drawing jig 100. FIG. FIG. 2 is a front view of the drawn substrate 11 of the drawing jig 100 as seen from the axial direction of the sleeve. FIG. 3(a) is a front view showing the sleeve clamp 20 of the pull-out jig 100. FIG. FIG. 3(b) is a front view showing the sleeve clamp 20 in a partially sectioned view.

The pull-out jig 100 of this embodiment pulls out the sleeve 500 from the main body 550 in which the sleeve 500 is fitted. A convex portion 510 is formed on the inner peripheral side of the sleeve 500 .

The sleeve 500 is fitted, for example, in a body 550 of a flow control device that controls the oil feed rate of a hydraulic elevator. The sleeve 500 is withdrawn from the body 550 of the flow controller for periodic replacement during maintenance work. The main body is not limited to the main body 550 of the flow control device, and may be, for example, an engine main body, a valve main body, or the like, as long as the sleeve 500 is fitted therein.

The sleeve 500 is formed in a substantially cylindrical shape in which the diameter on the rear side in the axial direction of the sleeve is smaller than the diameter on the front side. An annular convex portion 510 is formed along the circumferential direction at a substantially central portion in the sleeve axial direction on the inner peripheral side of the sleeve 500 .

The pull-out jig 100 includes a pull-out substrate 11 arranged outside the end surface of the main body 550 and at least two support shafts 12 whose front ends can contact the end surface of the main body 550 and whose rear ends screw into the pull-out substrate 11 . and an extractor 10 having. The pull-out jig 100 also includes a sleeve clamp 20 and a connecting shaft 30, which will be described later in detail.

The puller 10 has a function of pulling out the sleeve clamp 20 and the connecting shaft 30 in the axial direction of the sleeve with reference to the end face of the main body 550 . The extractor 10 also functions as a base for extracting the sleeve 500 from the main body 550 .

The extraction tool 10 has an extraction substrate 11 arranged outside the end surface of the main body 550 . The extracted substrate 11 is installed along the radial direction of the sleeve. The drawn substrate 11 is elongated along the radial direction of the sleeve. As shown in FIG. 2, an elongated hole 11A through which the connecting shaft 30 penetrates is formed substantially in the center of the drawn substrate 11. As shown in FIG. As a result, the connection shaft 30 can be finely adjusted in the radial direction of the sleeve of the drawn substrate 11 . A screw hole 11B into which a support shaft 12, which will be described later in detail, is screwed is formed in each of both end portions of the extracted substrate 11. As shown in FIG. Thus, by rotating the support shaft 12, it is possible to move the drawn substrate 11 in the axial direction of the sleeve.

The extractor 10 has two support shafts 12 that contact the end faces of the main body 550 . The support shaft 12 is formed in a rod shape. Threaded portions 12A are formed at the central portion and the front portion when the support shaft 12 is divided into three equal parts in the axial direction of the sleeve. The screw portion 12A is screwed into the screw hole 11B of the drawing board 11 . A contact plate 13 is provided at the rear end of the support shaft 12 . The contact plate 13 is in contact with the front end face of the main body 550 . A knob 14 is provided at the front end of the support shaft 12 so that an operator can pinch and hold the support shaft 12 with his or her fingers when rotating the support shaft 12 .

The sleeve grip 20 is arranged along the sleeve radial direction within the sleeve 500 . Also, the sleeve clamp 20 can engage both ends with the protrusions 510 by expanding and contracting in the radial direction of the sleeve. Furthermore, the sleeve grip 20 has sufficient rigidity against bending in the axial direction of the sleeve. The sleeve gripper 20 has the function of gripping the projection 510 of the sleeve 500 in this embodiment in order to pull out the sleeve 500 .

As shown in FIG. 3 , the sleeve clamp 20 is configured to be able to expand and contract as the inner cylinder 22 slides inside the outer cylinder 21 and the inner cylinder 22 advances and retreats with respect to the outer cylinder 21 . With the inner cylinder 22 retracted from the outer cylinder 21, the connecting shaft 30 passing through the elongated hole 11A of the drawing board 11 is eccentric from the sleeve axis, so that the sleeve clamp 20 can get over the projection 510. . Further, when the inner cylinder 22 is advanced with respect to the outer cylinder 21 to extend the sleeve clamp 20 , the sleeve clamp 20 can be engaged with the convex portion 510 .

The outer cylinder 21 and the inner cylinder 22 are formed in a cylindrical shape and made of metal having sufficient rigidity against bending in the axial direction of the sleeve. A hole (not shown) through which the connecting shaft 30 passes is formed on the front side and rear side of the outer cylinder 21 in the axial direction of the sleeve. A pair of annular stoppers 34 , 34 are fixed to the connecting shaft 30 on the front and rear sides of the outer cylinder 21 . Thereby, the connecting shaft 30 is rotatably supported by the outer cylinder 21 .

A long hole 22A through which the connecting shaft 30 penetrates is formed on the front side and rear side of the inner cylinder 22 in the axial direction of the sleeve. As a result, the inner cylinder 22 can move forward and backward with respect to the outer cylinder 21 while the connecting shaft 30 passes through the inner cylinder 22 . A rack 23 is fixed inside the inner cylinder 22 along the axial direction of the sleeve of the inner cylinder 22 . A pinion 31 that meshes with the rack 23 is fixed to the rear end of the connecting shaft 30 . As a result, the inner cylinder 22 advances and retreats with respect to the outer cylinder 21 as the connecting shaft 30 rotates about its axis.

Contact pieces 25 , 25 are provided at one end portion of the outer cylinder 21 in the sleeve radial direction and the other end portion of the inner cylinder 22 in the sleeve radial direction. The outer side of the contact piece 25 in the sleeve radial direction is formed in an arc shape so as to contact the inner peripheral side of the sleeve 500 . The contact piece 25 is made of metal, for example.

The connecting shaft 30 has a rear end supporting the sleeve clamp 20 and a front end passing through the drawing board 11 and having a fixing nut 32 screwed to the front side of the drawing board 11 . The connecting shaft 30 has a function of connecting the drawing board 11 and the sleeve clamp 20 . Further, it has a function of expanding and contracting the sleeve clamp 20 along the radial direction of the sleeve by rotating the connecting shaft 30 .

The connecting shaft 30 is formed in a rod shape and installed along the axial direction of the sleeve. A pinion 31 that meshes with the rack 23 of the sleeve gripper 20 is fixed to the rear end of the connecting shaft 30 in the axial direction of the sleeve. A threaded portion 30A is formed at the front portion when the connecting shaft 30 is divided into two equal parts in the axial direction of the sleeve. A fixing nut 32 is screwed onto the screw portion 30A on the front side of the drawing board 11 . A knob 33 is provided at the front end portion of the connecting shaft 30 in the axial direction of the sleeve so that the operator can pinch and hold the connecting shaft 30 with his or her fingers when rotating the connecting shaft 30 .

The fixing nut 32 regulates the position of the connecting shaft 30 with respect to the drawing board 11 in the axial direction of the sleeve. The fixing nut 32 is screwed onto the threaded portion 30</b>A of the connecting shaft 30 and is in contact with the front end surface of the drawing board 11 . By screwing the fixing nut 32 onto the threaded portion 30A of the connecting shaft 30, the position of the fixing nut 32 on the connecting shaft 30 can be adjusted.

The drawing operation of the sleeve 500 using the drawing jig 100 will be described with reference to FIG. 4A to 4D are schematic diagrams showing the flow of work for pulling out the sleeve 500 in order from FIG. 4(a) to FIG. 4(d).

As shown in FIG. 4( a ), first, the operator shortens the length of the sleeve grip 20 until it is at least smaller than the inner diameter of the projection 510 of the sleeve 500 , and inserts the sleeve grip 20 into the sleeve 500 . , and set the sleeve clamp 20 on the rear side of the protrusion 510 .

As shown in FIG. 4(b), the operator then rotates the knob 33 of the connecting shaft 30, thereby pulling the sleeve clamp 20 until the contact pieces 25, 25 come into contact with the inner peripheral side of the sleeve 500. As shown in FIG. is stretched in the radial direction of the sleeve. Then, the pull-out jig 100 moves the sleeve grip 20 forward in the axial direction of the sleeve until the contact pieces 25 , 25 of the sleeve grip 20 come into contact with the convex portion 510 .

As shown in FIG. 4( c ), the worker then rotates the fixing nut 32 of the connecting shaft 30 to pull out the substrate 11 until the contact plate 13 of the extractor 10 comes into contact with the front end face of the main body 550 . to move.

As shown in FIG. 4(d), the operator then rotates the two knobs 14, 14 of the extractor 10 substantially simultaneously to pull out the base plate 11 and the sleeve clamp 20 with the contact plates 13, 13 as fulcrums. And the connecting shaft 30 is pulled forward in the axial direction of the sleeve. As a result, the convex portion 510 of the sleeve 500 is pushed forward in the sleeve axial direction by the sleeve grip 20 , and the sleeve 500 is pulled out from the main body 550 .

The effect of the extraction jig 100 will be described. According to the pull-out jig 100 , the sleeve 500 can be easily pulled out from the main body 550 by engaging the sleeve grip 20 with the projection 510 of the sleeve 500 regardless of the diameter or shape of the sleeve 500 .

The configuration of a drawing jig 200 according to another embodiment will be described with reference to FIG. FIG. 5 is a plan sectional view showing the configuration of the extraction jig 200. As shown in FIG.

The pull-out jig 200 pulls out the sleeve 500 from the main body 550 in which the sleeve 500 is fitted. A plurality of holes 520 are formed in the side peripheral surface of the sleeve 500 . The extracting tool 10 and the connecting shaft 30 of the extracting tool 200 have the same configuration as the connecting shaft 30 and the extracting tool 10 of the extracting tool 100 described above, and thus the description thereof is omitted.

The sleeve grip 220 is installed along the sleeve radial direction within the sleeve 500 . The sleeve grip 220 is configured to be extendable along the radial direction of the sleeve. Since the sleeve clamp 220 has the same configuration as the sleeve clamp 20 except for the contact piece 225, the description thereof will be omitted.

The contact pieces 225 and 225 are provided on one side of the outer cylinder 221 in the sleeve radial direction and on the other side of the inner cylinder 222 in the sleeve radial direction. The outer side of the contact piece 225 in the sleeve radial direction is formed into a substantially cylindrical shape that is at least smaller than the hole 520 so as to engage with the hole 520 of the sleeve 500 . The contact piece 225 is made of metal, for example.

The effect of the extraction jig 200 will be described. According to the pull-out jig 200 , the sleeve 500 can be easily pulled out from the main body 550 by engaging the sleeve grip 220 with the hole 520 of the sleeve 500 regardless of the diameter or shape of the sleeve 500 .

The configuration of a drawing jig 300, which is still another embodiment, will be described with reference to FIG. FIG. 6 is a plan sectional view showing the configuration of the extraction jig 300. As shown in FIG.

The pull-out jig 300 pulls out the sleeve 500 from the main body 550 . A convex portion 510 is formed on the inner peripheral side of the sleeve 500 . The extracting tool 10 of the extracting tool 300 has the same configuration as the extracting tool 10 of the extracting tool 100 described above, so the description thereof is omitted.

The sleeve grip 320 has a length (major axis) in the radial direction of the sleeve greater than the inner diameter of the convex portion 510 and is supported in the sleeve 500 so as to be tiltable with respect to the radial direction of the sleeve. The sleeve clamp 320 is inclined with respect to the radial direction of the sleeve within the sleeve 500 to climb over the convex portion 510, and both ends thereof can be engaged with the convex portion 510 in a state parallel to the radial direction of the sleeve. Furthermore, the sleeve grip 320 has sufficient rigidity against bending of the sleeve 500 in the sleeve axial direction.

A connecting shaft 330 passes through the elongated hole 320A of the sleeve clamp 320 . Thereby, the connecting shaft 330 can be eccentric or inclined with respect to the center of the sleeve clamp 320 at the elongated hole 320A of the sleeve 500 . In other words, the center of the sleeve clamp 320 can be eccentric with respect to the connecting shaft 330 and the sleeve clamp 320 can be tilted with respect to the connecting shaft 330 .

Further, the sleeve grip 320 is urged from the front side of the connecting shaft 330 by a spring 335 and is restricted from moving rearward by an annular stopper 334 fixed at the rear end of the connecting shaft 330 . As a result, the sleeve grip 320 is urged by the spring 335 so that the rear end of the connecting shaft 330 assumes a posture perpendicular to the connecting shaft 330 (parallel to the radial direction of the sleeve).

The sleeve grip 320 is formed in an elongated and flat plate shape when viewed from the axial direction of the sleeve. The sleeve grip 320 is made of metal, for example, having sufficient rigidity against bending in the axial direction of the sleeve. A long hole 320A is formed in a substantially central portion of the sleeve grip 320 in the radial direction of the sleeve. An annular stopper 334 is fixed to the connecting shaft 330 behind the sleeve clamp 320 .

The connecting shaft 330 has a rear end supporting the sleeve grip 320 and a front end passing through the drawing board 11 and having the fixing nut 32 screwed to the front side of the drawing board 11 . The connecting shaft 330 has a function of connecting the drawing board 11 and the sleeve clamp 320 . The connecting shaft 330 is formed in a rod shape and installed along the axial direction of the sleeve.

A spring 335 is provided on the connecting shaft 330 . A spring 335 is interposed between the drawing board 11 and the sleeve clamp 320 . The fixing nut 32 and the knob 33 have the same configuration as the fixing nut 32 and the knob 33 of the extraction jig 100 described above, so the description thereof will be omitted.

An operation of extracting the sleeve 500 using the extracting jig 300 will be described. First, the operator inserts sleeve grip 320 into sleeve 500 . At this time, by pressing one end of the sleeve clamp 320 with a finger or the like to incline the sleeve clamp 320 with respect to the radial direction of the sleeve, the sleeve clamp 320 overcomes the convex portion 510 and moves the sleeve clamp 320 to the convex portion. It can be located behind 510 . Then, when the one end side of the sleeve grip 320 that has been pressed is released, the sleeve grip 320 becomes parallel to the radial direction of the sleeve at the front end of the connecting shaft 330 . The subsequent drawing work has the same flow as the drawing work of the drawing jig 100 described above (from FIG. 4(b) onwards), so the description thereof is omitted.

The effect of the extraction jig 300 will be described. According to the pull-out jig 300 , the sleeve 500 can be easily pulled out from the main body 550 by engaging the sleeve grip 320 with the projection 510 of the sleeve 500 regardless of the shape of the sleeve 500 .

It should be noted that the present invention is not limited to the above-described embodiments and modifications thereof, and it goes without saying that various modifications and improvements are possible within the scope of the matters described in the claims of the present application. .

REFERENCE SIGNS LIST 10 extraction tool 11 extraction substrate 11A long hole 11B screw hole 12 support shaft 12A threaded portion 13 abutment plate 20 sleeve clamp 21 outer cylinder 22 inner cylinder 22A long hole 23 rack 25 Contact piece 30 Connecting shaft 30A Threaded portion 31 Pinion 32 Fixing nut 34 Stopper 100 Extraction jig 500 Sleeve 510 Convex portion 520 Hole 550 Body

Claims (1)

A sleeve extracting jig for extracting a sleeve from a main body in which a sleeve having an annular protrusion formed along the inner circumference is fitted,
a puller having a pull-out substrate disposed outside an end surface of the main body, and at least two support shafts, one end of which can abut against the end surface of the main body and the other end of which is screwed into the pull-out substrate;
a long axis larger than the inner diameter of the annular convex portion, supported in the sleeve so as to be tiltable with respect to the radial direction of the sleeve, and inclined in the radial direction within the sleeve to climb over the convex portion; a sleeve clamp that can engage both ends with the projections in a state parallel to the radial direction and has sufficient rigidity against bending of the sleeve in the axial direction;
a connecting shaft having one end supporting the sleeve grip, the other end penetrating the drawing board, and having a fixing nut screwed to the other side of the drawing board;
a spring interposed between the drawing board and the sleeve clamp;
with
A long hole is formed in a substantially central portion of the sleeve in the radial direction of the sleeve grip,
An annular stopper is fixed to the connecting shaft on one end side of the sleeve grip,
Sleeve pull-out jig.

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