JP3100838U - Hydraulic puller - Google Patents

Abstract

An object of the present invention is to provide a hydraulic puller that facilitates operation of a steering wheel and control of a hydraulic circuit.
A cylinder (2), a pump (3), an oil tank (4), a puller head (5), and an operation handle (32) are provided. The piston is formed by threading a mountain, and a piston 31 in which an oil chamber 41 is formed along an axis and a hollow oil guide tube 25 provided in the oil chamber are slidably housed in the cylinder. At the same time, a needle set 26 is provided at a lower end of the piston, an upper end of the oil guide tube 25 is connected to a lower end of a center hole formed in the cylinder, and the puller head is connected to a plurality of connection portions at equal intervals on an outer peripheral surface. 51 are provided, and a claw 53 is rotatably provided via a connecting plate 52. The puller head has an operation panel 55 provided on the upper surface, and a fastening member 54 is inserted through the operation panel 55 so as to be screwed into a screw hole formed on the upper surface of the connection portion of the puller head.
[Selection diagram] FIG.

Description

  The present invention relates to a hydraulic puller, and more particularly to a hydraulic puller for performing a drawing operation.

In a conventional hydraulic puller, when a user rotates the puller head by hand, the puller head descends along an external thread threaded below the oil can and drives the claw to deploy and contract. However, the puller head of the conventional hydraulic puller does not have a required fulcrum when performing a rotating operation, which is inconvenient.
In the conventional hydraulic puller, the control speed of the oil circuit is low because the control device of the oil circuit is set to a single speed type. Therefore, before the needle set provided above the operation shaft comes in contact with the shaft, the user can move the needle set of the operation shaft many times by moving the handle up and down to position the needle set for the first time.
Further, since the conventional control device of the oil circuit of the hydraulic puller is of an external connection type, the user always makes a mistake in the adjustment and the safety is lacking.
Depending on factors such as the actual working environment and terrain, it may be necessary to replace the handle with a handle with a different length.However, since the operating handle of a conventional hydraulic puller is fixed, It is inconvenient because it is not possible to respond to the necessary needs.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic puller in which a steering operation or a hydraulic circuit can be easily controlled.

  Accordingly, the present inventors have conducted intensive studies in view of the drawbacks found in the conventional technology, and as a result, in a hydraulic puller including a cylinder, a pump, an oil tank, a puller head, and an operation handle, the cylinder has In the lower half part, an external thread is threaded on the outer peripheral surface, and an internal thread threaded corresponding to the external thread is threaded on the inner wall of the puller head. A piston in which an oil chamber is formed and a hollow oil guide tube provided in the oil chamber are slidably housed, and a needle set is provided at a lower end of the piston. The puller head is connected to the lower end of the center hole formed in the cylinder, the puller head is provided on the outer peripheral surface with a plurality of connecting portions projecting outward at equal intervals, and further, the upper end of the connecting plate is connected to the upper end of the connecting plate. The lower end of the connecting plate is slidably connected to a substantially middle position of a claw, and an operation panel is provided on the upper surface of the puller head. A plurality of notches are formed along the hole, a hole is formed for fitting the upper end of the puller head, a plurality of slide grooves are formed along the hole, and a fastening member is formed in the slide groove. The present invention was completed based on the finding that the problem can be solved by the structure of a hydraulic puller in which one end of the fastening member is screwed into a screw hole formed on the upper surface of the connection part of the puller head. I let it.

  Further, in the above-mentioned hydraulic puller, when the piston in the pump moves outward with the operation of the handle, an oil suction check valve for sucking oil contained in an oil chamber in the oil tank into the pump. A high-pressure check valve for preventing oil in the pump from flowing back into the oil chamber of the oil tank, an oil recovery switch, a check valve, a pressure switching valve, a high-speed oil supply valve, and a regulating valve. By providing the oil circuit control device according to the present invention, a hydraulic puller that solves the problem of the present invention can be obtained.

Hereinafter, this invention will be specifically described.
The hydraulic puller according to claim 1, comprising a cylinder, a pump, an oil tank, a puller head, and an operation handle, wherein a lower half of the cylinder is threaded with an external thread on an outer peripheral surface thereof, A female thread is screwed into the inner wall of the puller head corresponding to the male thread, and a piston having an oil chamber formed along an axis inside the cylinder is provided inside the oil chamber. A hollow oil guide tube is slidably housed, and a needle set is provided at a lower end of the piston. The upper end of the oil guide tube is connected to a lower end of a center hole formed in the cylinder. Are provided on the outer peripheral surface so as to project a plurality of connecting portions at equal intervals outwardly, furthermore, the upper end of the connecting plate is rotatably provided on the connecting portion, and the lower end of the connecting plate is located at a substantially intermediate position of the claw. In hydraulic puller comprising configured to movably connected,
The puller head is provided with an operation panel on an upper surface, the operation panel forms a plurality of cutouts along a circumference, and a hole for fitting and inserting into an upper end of the puller head is formed. A plurality of slide grooves are formed along the slide groove, a fastening member is inserted into the slide groove, and one end of the fastening member is screwed into a screw hole formed on an upper surface of a connection portion of the puller head. .

  According to a second aspect of the present invention, there is provided the hydraulic puller according to the first aspect, wherein the cylinder has a hollow projection integrally formed on an upper surface, and one end from the upper surface communicates with an oil chamber inside the oil tank. A first storage hole having a substantially middle position communicating with the inclined hole, and a substantially middle position formed in a vertical direction in an upper portion of the cylinder, and a lower end formed in an oil chamber of the cylinder; A second storage hole communicating with the lower guide hole communicating with the second storage hole; and a third storage hole having a substantially middle position formed in the vertical direction and having an upper end communicating with the upper guide hole communicating with the oil chamber of the oil tank. , A substantially middle position communicates with one end on the inner side of the first storage hole, and a lower end communicates with an oil chamber in the cylinder. Inside the hollow projection When one end is connected to the lower end of the pump, and the piston in the pump moves outward with the operation of the handle, the oil stored in the oil chamber in the oil tank is sucked into the pump. A suction check valve, a high-pressure check valve provided inside the oil suction check valve to prevent the oil in the pump from flowing back into the oil chamber of the oil tank, and a high pressure check valve formed in the upper part of the cylinder. An oil recovery switch provided in the first storage hole, a check valve provided in the first storage hole formed in the upper part of the cylinder, and a second storage hole formed in the upper part of the cylinder. A pressure switching valve provided, a high-speed oil supply valve screwed and fixed to an upper end of a through-hole formed in the upper part of the cylinder, and a third storage hole formed in the upper part of the cylinder. Characterized in that it comprises a two-stage speed type oil circuit controlled by the oil circuit control unit which includes a provided are regulating valve.

  According to a third aspect of the present invention, in the hydraulic puller according to the first aspect, the operation handle is a telescopic operation handle whose length can be freely adjusted.

  The hydraulic puller according to the present invention has an effect that handle operation or control of a hydraulic circuit is facilitated.

  The hydraulic puller according to the present invention includes an oil circuit control device 1, a cylinder 2, a pump 3, an oil tank 4, and a puller head 5, as disclosed in FIGS. A male thread 23 is threaded on the outer peripheral surface of the lower half, and a female thread 50 screwed corresponding to the male thread 23 is threaded on the inner wall of the puller head 5. A piston 24 and an oil guide tube 25 are slidably housed in the cylinder 2. A needle set 26 is provided at a lower end of the piston 24. The oil guide tube 25 is a hollow tube, is provided in an oil chamber 240 formed along the axis of the piston 24, and has an upper end formed at the lower end of a center hole 228 formed at the center of the cylinder 2. Connect to The puller head 5 is provided with a plurality of connecting portions 51 protruding outward at equal intervals on the outer peripheral surface, and furthermore, the upper end of the connecting plate 52 is rotatably provided on the connecting portion 51. The lower end of the connecting plate 52 is slidably connected to a substantially middle position of the claw 53.

  The operation panel 55 is provided on the upper surface of the puller head 5. The operation panel 55 has a plurality of notches 551 along the circumference, and a plurality of hook-shaped parts are formed on the circumference. Further, the operation panel 55 is provided with a hole to be inserted into the upper end of the puller head 5, and a plurality of slide grooves 552 are formed along the hole. A fastening member 54 made of, for example, a fixing bolt is inserted into the slide groove 552, and one end of the fastening member 54 is screwed into a screw hole 511 formed on the upper surface of the connection portion 51 of the puller head 5. Therefore, when the operation panel 55 is manually rotated, the puller head 5 can be raised and lowered to control the opening and closing operation of the claw 53. In addition, since the notch 551 is formed in the operation panel 55, when the operation panel 55 is manually rotated, an anti-slip action is obtained, which is convenient.

  FIG. 2 discloses the structure of the oil circuit control device 1 according to the present invention. According to the drawings, the oil circuit control device 1 includes an oil suction check valve 11, a high pressure check valve 12, an oil recovery switch 13, a check valve 14, a pressure switching valve 15, a high-speed oil supply valve 16, And a pressure regulating valve 17.

  As shown in FIGS. 3 to 5, the oil suction check valve 11 is provided inside a hollow protrusion 21 formed above the cylinder 2 and is connected to the lower end of the pump 3. The oil suction check valve 11 has a function of sucking the oil stored in the oil chamber 41 in the oil tank 4 into the pump 3 when the pump piston 31 moves outward with the operation of the handle 32. Have.

  As shown in FIGS. 8, 10 and 11, the high-pressure check valve 12 is provided inside the oil suction check valve 11 so that the oil in the pump 3 flows back into the oil chamber 41 of the oil tank 4. It has the effect of preventing that.

  The oil recovery switch 13 and the check valve 14 are provided in a first storage hole 221 formed in the upper portion 22 of the cylinder 2. A substantially middle position of the first storage hole 221 communicates with an inclined hole 222 formed from the upper surface of the cylinder 2, and one end of the inclined hole 222 communicates with an oil chamber 41 formed inside the oil tank 4. .

  The pressure switching valve 15 is provided in a second storage hole 223 formed in the upper section 22 of the cylinder 2. As disclosed in FIG. 13, a substantially middle position of the second storage hole 223 communicates with a lower guide hole 224 formed in a vertical direction. One end of the lower guide hole 224 communicates with the oil chamber 20 in the cylinder 2.

  The high-speed oil supply valve 16 is screwed and fixed to an upper end of a through-hole 227 formed in the upper stage 22 of the cylinder 2 as disclosed in FIGS. A substantially middle position of the through hole 227 communicates with one end on the inner side of the first storage hole 221, and a lower end of the through hole 227 communicates with the oil chamber 20 in the cylinder 2.

  As disclosed in FIGS. 5 and 13, the pressure regulating valve 17 is provided in a third storage hole 225 formed in the upper section 22 of the cylinder 2. As shown in FIG. 13, the other end of the third storage hole 225 communicates with an upper guide hole 226 formed in a vertical direction. One end of the upper guide hole 226 communicates with the oil chamber 41 of the oil tank 4.

  As described above, in assembling the hydraulic puller of the present invention, as shown in FIG. 3, the male thread 23 is threaded on the outer peripheral surface of the lower half of the cylinder 2, and the male thread 23 is formed on the inner wall of the puller head 5. The female screw thread 50 to be screwed corresponding to the thread 23 is thread-cut. A piston 24 and an oil guide tube 25 are slidably housed in the cylinder 2. A needle set 26 is provided at a lower end of the piston 24. The oil guide tube 25 is a hollow tube, is provided in an oil chamber 240 formed along the axis of the piston 24, and has a center hole formed at the upper end thereof at the center of the upper stage 22 of the cylinder 2. 228 to the lower end.

  The puller head 5 is provided with a plurality of connecting portions 51 protruding outward at equal intervals on the outer peripheral surface, and the connecting portion 51 is provided with the upper end of a connecting plate 52 rotatably. The lower end of the connection plate 52 is slidably connected to a substantially middle position of the claw 53.

  7 and 7-1, the puller head 5 is provided with an operation panel 55 on the upper surface. The operation panel 55 has a plurality of notches 551 formed along the circumference, and a plurality of hook-shaped portions formed around the circumference. Further, the operation panel 55 has a hole for insertion into the upper end of the puller head 5, and a plurality of slide grooves 552 along the hole.

  In the hydraulic puller of the present invention configured as described above, when the operation panel 55 is manually rotated, the puller head 5 moves up and down to control the opening / closing operation, which is the contraction and expansion of the claw 53. In this case, since the notch 551 is formed on the outer periphery of the operation panel 55, a fulcrum for rotating the operation panel 55 is formed, and the rotation operation is facilitated.

  The oil circuit control device 1 is of a two-stage speed type, and is quickly raised and positioned once before the needle set 26 provided at the lower end of the piston 24 contacts the shaft 7. In addition, since the oil circuit control device 1 is of an internal installation type, the hydraulic puller can be protected and the safety can be improved without the user making an incorrect adjustment, and the user can be protected and work safety can be improved. Can be secured.

  The hydraulic puller according to the present invention includes an operation handle 32, and the operation handle 32 is a telescopic handle whose length can be freely adjusted. Therefore, the user can adjust the length of the operation handle 32 according to the situation.

  As disclosed in FIGS. 13 and 14, the hydraulic puller of the present invention performs oil supply and oil discharge by moving the pump piston 31 up and down by the operation of the operation handle 32. When the oil in the oil chamber 41 in the oil tank 4 flows into the oil chamber 20 of the cylinder 2, the piston 24 of the cylinder 2 and the needle set 26 provided at one end of the piston 24 are pushed outward. In this case, the distance between the pointed end of the needle set 26 and the hook 531 of the claw 53 is reduced, and the distance between the hook 531 of the claw 53 and the tip of the needle set 26 is relatively reduced. The effect of removing 6 from shaft 7 is obtained.

  As disclosed in FIGS. 10 and 14, when the operating handle 32 is pushed upward, the pump piston 31 rises, and the oil in the oil chamber 41 in the oil tank 4 flows from the oil entrance passage 111 of the oil suction check valve 11. It enters the pump 3. 11 and 13, when the operating handle 32 is lowered, the pump piston 31 is lowered, and the oil in the pump 3 passes through the oil outlet passage 112 of the oil suction check valve 11, and then the cylinder moves. 2 flows into the oil chamber 20 formed in the upper section 22. When oil flows into the oil chamber 20 of the cylinder 2, the piston 24 and the needle set 26 receive pressure and move outward.

  In a process in which the pump piston 31 is raised or lowered to cause oil suction and oil discharge, a high-pressure check valve 12 previously provided in the oil check valve 11 prevents the oil sucked into the pump 3 from flowing backward. This has the effect of preventing the oil from flowing into the oil chamber 41 of the oil tank 4.

  With the hydraulic puller according to the present invention, the work 6 to be pulled out is pulled out from the shaft 7, and then the oil recovery switch 13 is rotated so that the first storage hole 221 and the center hole 228 of the check valve 14 are separated. When the separating operation is stopped and the first storage hole 221 and the center hole 228 are communicated with each other, the piston 24 and the needle set 26 are moved inside by the urging force of the elastic body fitted on the outer peripheral surface of the piston 24. The oil in the oil chamber 20 of the cylinder 2 finally returns to the oil chamber 41 of the oil tank 4.

  In the hydraulic puller according to the present invention, the oil circuit control device 1 is set to a two-speed type. Accordingly, the control speed of the oil circuit is high, and it is not necessary to repeatedly move the operating handle 32 up and down before the needle set 26 of the piston 24 comes into contact with the shaft 7. The needle set 26 can be quickly moved and pressed against the shaft 7 for positioning.

  In the present invention, the oil circuit control device 1 of the hydraulic puller is installed inside. Therefore, it is possible to ensure that the user does not mistakenly adjust the oil advance of the oil circuit, and that the operational safety of the hydraulic puller is ensured.

  The operation handle 32 is a telescopic handle whose length can be freely adjusted. Therefore, the length of the operation handle 32 can be adjusted according to the needs of the user or the situation.

  The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Therefore, any modification or change that can be made by those skilled in the art, which is made in the spirit of the present invention and which has an equivalent effect on the present invention, belongs to the scope of the utility model claims of the present invention. And

It is a perspective view of the hydraulic puller by this invention. FIG. 3 is a circuit diagram of an oil circuit control device of the hydraulic puller according to the present invention. FIG. 2 is a cross-sectional view of the hydraulic puller disclosed in FIG. 1. FIG. 2 is an exploded view of the hydraulic puller disclosed in FIG. 1. FIG. 4 is an explanatory diagram showing components of the oil circuit control device according to the present invention. FIG. 4 is a sectional view taken along line AA disclosed in FIG. 3. FIG. 4 is a sectional view taken along line BB disclosed in FIG. 3. It is explanatory drawing showing operation | movement of the operation panel in this invention. FIG. 4 is an exploded view showing components of the oil suction check valve and the high pressure check valve in the present invention. FIG. 9 is a plan view of the oil suction check valve disclosed in FIG. 8. FIG. 10 is a sectional view taken along line CD in FIG. 9. FIG. 10 is a sectional view taken along the line D-E in FIG. 9. It is explanatory drawing showing the mode of use of the hydraulic puller in this invention. It is explanatory drawing showing the operation of the hydraulic puller in this invention. It is explanatory drawing showing other operation of the hydraulic puller in this invention.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 oil circuit control device 11 oil suction check valve 111 oil inlet passage 112 oil discharge passage 12 high pressure check valve 13 oil recovery switch 14 check valve 15 pressure switching valve 16 high-speed oil supply valve 17 pressure regulating valve 2 cylinder 20 oil chamber 21 Projection 22 Upper Step 221 First Storage Hole 222 Inclined Hole 223 Second Storage Hole 224 Lower Guide Hole 225 Third Storage Hole 226 Upper Guide Hole 227 Through Hole 228 Center Hole 23 Male Thread 24 Piston 240 Oil Chamber 25 Oil Guide Pipe 26 Needle set 3 Pump 31 Pump piston 32 Operation handle 4 Oil tank 41 Oil chamber 5 Puller head 50 Female thread 51 Connection part 511 Screw hole 52 Connecting plate 53 Claw 531 Hook part 54 Fastening member 55 Operation panel 551 Notch part 55 Slide groove 6 workpiece 7 axis

Claims (3)

A cylinder, a pump, an oil tank, a puller head, and an operation handle, and a male thread is threaded on an outer peripheral surface in a lower half portion of the cylinder, and an inner thread of the puller head is formed on an inner wall corresponding to the male thread. A female thread to be screwed is threaded, and a piston in which an oil chamber is formed along the axis and a hollow oil guide pipe provided in the oil chamber are slidably provided inside the cylinder. The piston is provided with a needle set at the lower end of the piston, the upper end of the oil guide tube is connected to the lower end of a center hole formed in the cylinder, and the puller head is connected to a plurality of connection portions at equal intervals on the outer peripheral surface. Is provided so as to protrude outwardly, and furthermore, the upper end of the connecting plate is rotatably provided at the connecting portion, and the lower end of the connecting plate is slidably connected to a substantially middle position of the claw. What In hydraulic Pula,
The puller head is provided with an operation panel on an upper surface, the operation panel forms a plurality of cutouts along a circumference, and a hole for fitting and inserting into an upper end of the puller head is formed. A plurality of slide grooves are formed along the groove, a fastening member is inserted into the slide groove, and one end of the fastening member is screwed into a screw hole formed on the upper surface of the connection portion of the puller head. Features a hydraulic puller. The cylinder has a hollow projection integrally formed on an upper surface thereof, and an inclined hole having one end communicating with an oil chamber inside an oil tank from the upper surface, and a substantially middle position is provided at an upper portion of the cylinder. A first storage hole communicating with the inclined hole, a substantially middle position formed in the vertical direction, and a second storage hole having a lower end communicating with a lower guide hole communicating with the oil chamber of the cylinder; Is formed in the vertical direction, and the upper end communicates with an upper guide hole communicating with the oil chamber of the oil tank, and a substantially middle position communicates with one end on the inner side of the first accommodation hole. And a through hole whose lower end communicates with the oil chamber in the cylinder,
Provided inside a hollow projection formed on the upper surface of the cylinder, one end is connected to the lower end of the pump, and when the piston in the pump moves outward with the operation of the handle, the oil tank An oil suction check valve for sucking oil stored in the oil chamber into the pump,
A high-pressure check valve provided inside the oil suction check valve to prevent the oil in the pump from flowing back into the oil chamber of the oil tank;
An oil recovery switch provided in a first storage hole formed in an upper portion of the cylinder;
A check valve provided inside a first storage hole formed in an upper portion of the cylinder;
A pressure switching valve provided in a second storage hole formed in an upper portion of the cylinder;
A high-speed oil supply valve screwed into and fixed to the upper end of a through-hole formed in the upper part of the cylinder,
The hydraulic system according to claim 1, further comprising a two-speed oil circuit controlled by an oil circuit control device including an adjustment valve provided in a third storage hole formed in an upper stage of the cylinder. Pula The hydraulic puller according to claim 1, wherein the operation handle is a telescopic operation handle whose length can be freely adjusted.

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