KR101948785B1 - One Wedge Centering Hydraulic Chuck - Google Patents

One Wedge Centering Hydraulic Chuck Download PDF

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Publication number
KR101948785B1
KR101948785B1 KR1020160023481A KR20160023481A KR101948785B1 KR 101948785 B1 KR101948785 B1 KR 101948785B1 KR 1020160023481 A KR1020160023481 A KR 1020160023481A KR 20160023481 A KR20160023481 A KR 20160023481A KR 101948785 B1 KR101948785 B1 KR 101948785B1
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KR
South Korea
Prior art keywords
wedge
lever
workpiece
plunger
chuck housing
Prior art date
Application number
KR1020160023481A
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Korean (ko)
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KR20170101355A (en
Inventor
서홍석
Original Assignee
주식회사 삼천리기계
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020160023481A priority Critical patent/KR101948785B1/en
Priority to PCT/KR2016/008338 priority patent/WO2017131304A1/en
Publication of KR20170101355A publication Critical patent/KR20170101355A/en
Application granted granted Critical
Publication of KR101948785B1 publication Critical patent/KR101948785B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/103—Retention by pivotal elements, e.g. catches, pawls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
    • B23B31/302—Hydraulic equipment, e.g. pistons, valves, rotary joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/064—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding elongated workpieces, e.g. pipes, bars or profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The present invention relates to a one-wedge-centering hydraulic chuck, which is capable of precisely centering a workpiece such as a rectangular, elliptical, as well as square, round, and circular pipes in cross section by interlocking four jaws by the operation of one wedge plunger , The clamping lifting force of the workpiece by the jaw can be minimized while minimizing the stroke of the wedge bar.
To this end, according to the present invention, an operation space (18) is formed so that a workpiece insertion hole (11) for inserting a workpiece is opened in the front center of the body and a variety of tools are accommodated in a diameter larger than the workpiece insertion hole , A chuck housing (10) having a vertical direction toward the center of rotation and having four encounter guide grooves (12) crossed with each other; Four master jaws (20) slidably assembled to the respective jaw guide grooves (12) of the chuck housing (10) and having a pressing space (23) formed on the back surface thereof; A piston of the hydraulic cylinder is connected to the back of the hydraulic cylinder in the working space 18 formed at the back of the chuck housing 10 and horizontally moved in the working space 18 by sliding movement of the piston, A wedge plunger (30) having four wedge insertion holes (32) formed in a vertically arranged manner and having both ends of the lever mounting holes (31) communicated with each other and being forwardly bent; A wedge lever 40 installed at each lever mounting hole 31 of the wedge plunger 30 and rotating at both ends of the pressing portion 42 in the lever mounting hole; A lever fixing bolt (50) fastened to the wedge plunger (30) through the center of the wedge lever (40) and rotatably supporting the wedge lever (40) in the lever mounting hole (31); A coupling groove 63 is formed at an upper end of the wedge insertion hole 32 of the wedge plunger 30 so that one end of the pressing lever 70 is inserted. A wedge bar 60 formed with a lever fitting groove 62 into which the pressing portion 42 at one end of the wedge lever 40 mounted on the wedge lever 40 is connected to each other; The lower portion of the chuck housing 10 is engaged with a coupling groove 63 formed in the wedge bar 60 and the upper portion of the chuck housing 10 is engaged with a master jaw And a press lever 70 that is fitted in the pressurizing space portion 23 formed on the back surface of the base plate 20.

Figure R1020160023481

Description

One Wedge Centering Hydraulic Chuck

The present invention relates to a one-wedge-centering hydraulic chuck, and more particularly, to a wedge-centering hydraulic chuck capable of precisely aligning four jaws by the operation of one wedge plunger so as to accurately form a rectangular, elliptical, Way centering hydraulic chuck capable of minimizing the clamping lifting force of the workpiece due to the jaw while minimizing the stroke of the wedge bar at the time of centering.

Generally, a hydraulic chuck is a device for fixing a workpiece desired to be machined when machining a workpiece machined by rotation, and has a plurality of jaws radially projected on a chuck housing to support and fix the workpiece in an inner or outer diameter will be.

As shown in FIG. 1, the hydraulic chuck is provided with a workpiece insertion hole 11 through which a workpiece can be inserted into the center of the body. The workpiece insertion hole 11 and a plurality of radially- A chuck housing (10) formed to penetrate outwardly; And is engaged with the jaw guide groove 12 of the chuck housing 10 and is tightened toward the center of the chuck housing 10 or moves toward the outside of the chuck housing 10 and is inclined to the rear, A protruding jaw member 3; A jaw projection engaging groove 5 is formed on the outer side of the chuck housing 10 and formed with a guide surface corresponding to the moving oblique projection 4 of the jaw member 3, And a wedge plunger 6 connected to and operated by a piston rod of a piston (not shown).

That is, when the wedge plunger 6 is moved forward and backward by the operation of the hydraulic cylinder, the jaw member 3 coupled to the wedge plunger 6 is moved by the moving oblique projection 4, It is tightened in the clamping direction or in the opposite direction.

The jaw member 3 includes a master jaw 20 coupled to the jaw guide groove and having a projecting slanting projection 4 engaged with the wedge plunger 6 projected from the master jaw 20, And a soft jaw (not shown) for clamping the jaws.

According to the size and shape of the workpiece to be clamped, the chucking member 3 is selected by the operator and is used by the operator in order to accurately clamp the workpiece to the center of the chuck.

Korean Registered Patent No. 10-1008853 - Hydraulic chuck (registered on January 11, 2011)

However, in such a conventional hydraulic chuck, since the jaw member is directly coupled to the wedge plunger, the workpiece must be fixed by replacing the jaw member with an appropriate one according to the workpiece. Therefore, in order to replace the soft jaw, It was necessary to separate and combine the soft jaws in the jaws.

The hydraulic chuck is mainly used when a chuck having three jaw members is used. The centering work for aligning the center line of the workpiece with the center of rotation of the hydraulic chuck is performed by clamping and fixing the circular workpiece with high precision However, there is a problem in that it is impossible to precisely center and fix a rectangular, rectangular and elliptical workpiece.

Therefore, conventionally, in order to fix a workpiece having a shape such as a rectangle, a chuck member has four chucks, and the two jaw members are operated by a wedge plunger to perform a centering operation. However, The piston of the cylinder also required two pistons, which made it difficult to manufacture and to fix the workpiece with high accuracy.

In other words, although the respective jaw members are moved in the chuck center direction to tighten the workpiece, when the pair of jaw members clamp the workpiece, the other pair of jaw members becomes difficult to move in the center direction, There was a defect.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to operate a wedge plunger by using a piston of a hydraulic cylinder and operate the wedge plunger to interlock four master jaws, Rods, and round pipes, as well as to precisely center and process deformed workpieces such as rectangular or elliptical sections.

Another object of the present invention is to improve the structure of the wedge bar so as to minimize the stroke of the wedge bar and to push the jaw in the vertical direction directly in accordance with the movement of the wedge bar so as to minimize the clamping buoyancy of the jaw I have to.

It is still another object of the present invention to provide a clamping device for clamping a workpiece clamped by a master jaw when centrifugal force is applied to the chuck housing by pressing the pressing lever by a centrifugal force, So that it is possible to fundamentally eliminate the phenomenon that the force is reduced.

According to an aspect of the present invention, there is provided a work space in which a workpiece insertion hole for inserting a workpiece is formed at the front center of a body, A chuck housing having a vertical direction toward the center of rotation and having four encounter guide grooves crossed; A plurality of master jaws slidably assembled in each of the jaw guide grooves of the chuck housing and having a pressing space formed on a back surface thereof; A piston of the hydraulic cylinder is connected to the working space formed at the back of the chuck housing so as to be connected to the rear of the chuck housing and horizontally moved in the operating space by the slide movement of the piston and the four lever mounting holes are vertically arranged along the outer periphery, A wedge plunger having four wedge insertion holes formed in a forward direction so as to communicate with both ends of each of the lever mounting holes; A wedge lever provided at each of the lever mounting holes of the wedge plunger and rotating at both ends of the wedge lever in the lever mounting hole with respect to the center hole; A lever fixing bolt for rotatably supporting the wedge lever in a lever mounting hole of the wedge plunger; The wedge lever is slidably mounted on each wedge insertion hole of the wedge plunger. The upper end of the wedge plunger is formed with a coupling groove into which one end of the pressure lever is inserted. A wedge bar on which a lever-fitting groove is formed; A lower portion of which is fitted in an engaging groove formed in the wedge bar and an upper portion of which is fitted in a pressurizing space portion formed on the back surface of the master jaw, A centering hydraulic chuck is provided.

The present invention has the following advantages in comparison with the conventional invention.

First, as the wedge plunger is moved by using one piston, the wedge lever mounted on the wedge plunger clamps or unlocks the four master jaws and simultaneously presses the workpiece, so that clamping of the workpiece becomes possible.

Accordingly, centering work for aligning the center line of the workpiece or the tool with the center of rotation of the hydraulic chuck can be performed on a workpiece of a deformed shape such as a quadrangle, a rectangle, and an ellipse.

Secondly, when the chuck housing rotates with the master jaw clamping the workpiece, the weight presses the pressing lever in the clamping direction of the master jaw by the centrifugal force, thereby preventing the workpiece from being detached from the chuck housing.

1 is an exploded perspective view showing a conventional hydraulic chuck
Fig. 2 is an exploded perspective view showing the original wedge-centering hydraulic chuck of the present invention
Fig. 3 is a perspective view showing the coupling state of Fig. 2 in a half-
FIG. 4 is a perspective view showing a half-section of the state in which the pushing lever is pressed by the movement of the wedge plunger in FIG. 3,
Figs. 5A and 5B are longitudinal sectional views before and after the movement of the wedge plunger
6 is an exploded perspective view showing a state of engagement of the wedge lever and the wedge bar of the present invention
7 is an assembled state perspective view of Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

FIG. 2 is an exploded perspective view showing a circle-wedge-centered hydraulic chuck according to the present invention, FIG. 3 is a perspective view showing a half-sectional view of the engaged state of FIG. 2, Sectional view of the chuck housing 10 shown in FIG. 2, wherein four chuck guide grooves 12 are formed on the front surface of the chuck housing 10 so as to cross each other, A wedge plunger 30 connected to a piston of a hydraulic cylinder (not shown) is provided in the working space 18 formed in the wedge plunger 30. As the piston pulls the wedge plunger 30 by the action of the hydraulic cylinder, (30) is moved in the working space (18) of the chuck housing (10).

A wedge lever 40 and a wedge bar 60 are provided in the wedge plunger 30 and four master jaws 20 are provided in the working space 18 of the chuck housing 10 in accordance with the movement of the wedge bar 60. [ The pressing lever 70 is provided so as to be rotatable around the pin 71. [

The chuck housing 10 has a workpiece insertion hole 11 through which a workpiece can be inserted into the center of the front surface of the body and a rear wall having a larger diameter than the workpiece insertion hole 11 An operation space 18 is formed so as to accommodate various kinds of equipment, and four encircling guide grooves 12 are formed in the cross direction on the front surface.

The master jaw 20 is slidably incorporated in the chuck housing groove 12 of the chuck housing 10 so that the pin 71 is inserted into the operating space 18 of the chuck housing 10, The upper portion of the pressing lever 70 is rotatably mounted on the wedge bar 60. The upper portion of the pressing lever 70 is engaged with the pressurizing space portion 23 formed on the back surface of each master jaw 20, 63, respectively.

The present invention can maximize the amount of movement of the master jaw 20 while reducing the stroke of the wedge bar 60 and reduce the amount of force generated by the rotation of the pressing lever 70 directly on the master jaw 20 The thickness of the chuck housing 10 can be reduced and the clamping force can be increased.

At this time, it is more preferable to form the projecting portion 72 at the rear end of the pressing lever 70 so that the concave recesses 81 of the weight 80 are respectively engaged with the projecting portions. When the chuck housing 10 rotates in a state where the chuck housing 10 is clamped, the pressing lever 70 is moved by the force of the centrifugal force to radially move the weight 80 in the radial direction of the rotary shaft, In order to be able to press the button.

The wedge plunger 30, the pressure lever 70, and the weight 80 as described above are installed to be wrapped by the cover 90, so that they are stably protected.

The wedge plunger 30 located in the rear working space 18 of the chuck housing 10 is connected to the piston of the hydraulic cylinder and moves horizontally along the operating space 18 by sliding movement of the piston.

As shown in Fig. 2, four lever mounting holes 31 are formed at equal intervals on the outer peripheral surface of the wedge plunger 30. The wedge lever 40 is assembled to each of the lever mounting holes 31, 7, a pressing lever 70 which is rotated about the pin 71 is inserted into the engaging groove 63 of the wedge bar 60 connected to one end of each of the wedge levers 40, So that the workpiece (not shown) can be centered on the center of rotation of the hydraulic chuck as the master jaw 20 is moved by the pressing lever 70.

In detail, the wedge plunger 30 is formed with four lever mounting holes 31 along the outer peripheries thereof at right angles to each other at regular intervals, and at both ends of the lever mounting holes 31, And a wedge insertion hole 32 is formed so as to communicate with the lever mounting holes 31.

The wedge lever 40 is inserted into the lever mounting hole 31 of the wedge plunger 30 so that the pressing portion 42 at both ends of the wedge lever 40 in the lever mounting hole 31 is engaged with the lever fixing bolt 30. [ Both ends of the lever mounting hole 31 are formed to be larger than the shape of the pressing portion 42 so that the wedge lever 40 can be rotated with a predetermined angle about the center axis 50 of the wedge lever 40. [

6, when the lever fixing bolt 50 is fastened at the upper center of the wedge lever 40, the lever fixing bolt 50 is fastened to the lever mounting hole 31, So that it can be rotated in the lever mounting hole 31.

The wedge bar 60 is assembled to the wedge insertion holes 32 of the wedge plunger 30 so as to have engagement grooves 63 for receiving the lower portion of the pushing lever 70, The lever fitting grooves 62 in which the pressing portions 42 at one end of the wedge lever 40 mounted on the holes 31 are connected to each other are formed to have a phase difference of 90 degrees.

One end of the wedge bar 60 is inserted into the wedge insertion hole 32 of the wedge plunger 30 and is moved rearward by the operation of the pressing portion 42. The engaging groove 63 formed on one surface of the wedge bar 60 is inserted into a chuck housing A lower portion of a press lever 70 provided to be rotatable about a pin 71 is fitted in an operating space 18 of the main body 10.

5A and 5B are longitudinal sectional views showing a state in which the master jaw 20 clamps the workpiece by the wedge bar 60 in accordance with the movement of the wedge plunger 30. The wedge plunger 30, The wedge bar 60 provided on the wedge plunger 30 is also moved backward so that the pressing lever 70 fitted in the engaging groove 63 of the wedge bar 60 is moved backward by the pin 71 So that the four master jaws 20 are tightened while being rotated around the center.

At this time, since the guide wing 21 of the master jaw 20 is fitted in the jaw guide groove 12 of the chuck housing 10, the four master jaws 20 are simultaneously stably fastened.

Accordingly, the present invention is characterized in that the wedge plunger 30 is provided with four wedge bars 60, and the chuck housing 10 is provided with four wedge bars 60 which are tightened by the pushing lever 70 by the movement of the wedge bar 60, The master jaw 20 is provided so that the master jaw 20 can be tightened in the center direction or can be widened as the wedge plunger 30 moves.

6 and 7 are perspective views showing the engaged state of the wedge lever 40 and the wedge bar 60. The wedge lever 40 is attached to each lever mounting hole 31 of the wedge plunger 30 by the lever fixing bolt 50 Each wedge insertion hole 32 is fitted with a wedge bar 60 and is engaged with the wedge lever 40.

A lever fitting groove 62 is formed at the rear of the wedge bar 60 so as to be connected to the pressing portions 42 of the wedge lever 40 mounted on the lever mounting holes 31, .

Therefore, the wedge lever 40 in the horizontal direction and the one-end pressing portion 42 of the wedge lever 40 in the vertical direction are simultaneously inserted into the lever fitting groove 62 of the wedge bar 60, The other wedge lever 40 rotates in the opposite direction with respect to the center of the lever fixing bolt 50, so that the other pressing portion 42 is moved in the opposite direction.

Hereinafter, the operation of the present invention will be described.

First, in the present invention, a process of centering and clamping a workpiece having a rectangular parallelepiped of 10 cm × 8 cm will be described.

Four wedge bars 60 are provided at equal intervals on the upper, lower, left, and right sides of the wedge plunger 30. The wedge lever 40 is provided in the lever fitting groove 62 of each wedge bar 60, The four wedge bars 60 provided on the wedge plunger 30 are also engaged with the wedge plunger 30 when the wedge plunger 30 moves backward to the left in the figure due to the movement of the piston Backward.

At this time, no load is applied to the wedge lever 40 fitted in the lever fitting groove 62 of the wedge bar 60, so that the wedge lever 40 is kept horizontal or vertical together with the wedge plunger 30, The lower portion of the pressing lever 70 rotatably mounted on the pin 71 in the operating space 18 of the chuck housing 10 is fitted in the engaging groove 63 of the wedge bar 60, 70 are fitted in the pressurizing space portion 23 formed on the back surface of each master jaw 20 so that the four master jaws 20 are simultaneously tightened in the direction of the central axis.

In this state, when the piston further moves the wedge plunger 30 back to the left in the drawing to bring the two master jaws 20 facing each other in mutual contact with the workpiece in the wide width direction (10 cm area), the two master jaws 20 ) Is stopped, at which time the remaining two master encounters are not touching the workpiece.

Thereafter, when the piston is subsequently moved backward to the left in the figure, the two master jaws 20, which were in contact with the workpiece, remain in contact with the workpiece, so that the two wedge bars 60 do not move Do not.

However, the remaining two master jaws 20 rotate the wedge lever 40 in the clockwise direction in the drawing about the lever fixing bolt 50 when the wedge bar 60 is continuously moved back to the left in the drawing, The wedge bar 60 is further moved backward to the left in the figure, so that the workpiece is clamped in the narrow longitudinal direction (8 cm area).

That is, the four master jaws 20 contact each of the four surfaces of the workpiece to complete the centering work of the workpiece.

When the piston is further moved back to the left side of the figure in the state where centering is completed while the four master jaws 20 contact the rectangular parallelepiped workpiece in this manner, the master jaws 20 are tightened in the direction of the center of the chuck housing 10 to strongly clamp the workpiece.

On the other hand, the workpiece is machined while rotating the chuck housing 10 at a high speed while clamping the workpiece to the chuck housing 10. At this time, the force of the master jaw 20 clamping the workpiece The weight 80 is engaged with the rear end of the pressing lever 70 for tightening or opening the master jaw 20 so that the centrifugal force generated by the rotation of the chuck housing 10 causes the weight 80 press the pressing lever 70, thereby preventing the master jaw 20 from being opened due to the centrifugal force.

Therefore, the present invention is characterized in that the wedge plunger 30 is moved using a single piston so that the rotational movement of the wedge lever 40 mounted on the wedge plunger 30 and the rotational movement of the four master jaws 20 The center chuck 10 is moved in the center direction of the chuck housing 10 to perform centering and clamping so that the workpiece of a different shape such as a rectangle, a rectangle and an ellipse is also moved to the center of rotation of the hydraulic chuck 10 It becomes possible to clamp with high precision.

In addition, since the workpiece can be clamped to the chuck housing 10 with a strong force, it is also possible to prevent the workpiece from being detached from the chuck housing 10 during the machining of the workpiece.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied with various changes and modifications without departing from the scope of the invention. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being described in the foregoing specification is defined by the appended claims, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

10: chuck housing 20: master jaw
23: pressurizing space section 30: wedge plunger
31: lever mounting hole 32: wedge insertion hole
40: wedge lever 42:
60: Wedge bar 62: Lever fitting groove
63: coupling groove 70: pressure lever
72: protrusion 80: weight

Claims (3)

A workpiece insertion hole 11 for inserting a workpiece is formed at the front center of the body and an operation space 18 is formed at the rear of the body for accommodating various articles with a diameter larger than that of the workpiece insertion hole, A chuck housing (10) having a vertical direction and four jaw guide grooves (12) intersecting with each other; Four master jaws (20) slidably assembled to the respective jaw guide grooves (12) of the chuck housing (10) and having a pressing space (23) formed on the back surface thereof; The piston of the hydraulic cylinder is connected to the back of the hydraulic cylinder in the working space 18 formed at the back of the chuck housing 10 and horizontally moved in the working space 18 by sliding movement of the piston, A wedge plunger (30) having four wedge insertion holes (32) widened forward to communicate with both ends of each of the lever mounting holes (31), the holes (31) being vertically arranged; A wedge lever 40 installed in each lever mounting hole 31 of the wedge plunger 30 and rotating both ends of the pressing portion 42 in the lever mounting hole; A lever fixing bolt (50) fastened to the wedge plunger (30) through the center of the wedge lever (40) and rotatably supporting the wedge lever (40) in the lever mounting hole (31); A coupling groove 63 is formed at an upper end of the wedge insertion hole 32 of the wedge plunger 30 so that one end of the pressing lever 70 is inserted. A wedge bar 60 formed with a lever fitting groove 62 into which the pressing portion 42 at one end of the wedge lever 40 mounted on the wedge lever 40 is connected to each other; The lower portion of the chuck housing 10 is engaged with an engaging groove 63 formed in the wedge bar 60 and an upper portion of the chuck housing 10 is engaged with a master jaw And a press lever (70) that is fitted in a pressurizing space (23) formed on the back surface of the cylinder (20).
The method according to claim 1,
Wherein a protrusion (72) is formed at a rear end of each of the pressure levers (70) and a weight (80) is coupled to the protrusion (72).
The method according to claim 1,
Wherein a cover (90) is provided at a rear end of the chuck housing (10) to wrap the wedge plunger (30) and the weight (80).
KR1020160023481A 2016-01-29 2016-02-26 One Wedge Centering Hydraulic Chuck KR101948785B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020160023481A KR101948785B1 (en) 2016-02-26 2016-02-26 One Wedge Centering Hydraulic Chuck
PCT/KR2016/008338 WO2017131304A1 (en) 2016-01-29 2016-07-29 One-wedge centering hydraulic chuck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160023481A KR101948785B1 (en) 2016-02-26 2016-02-26 One Wedge Centering Hydraulic Chuck

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KR101948785B1 true KR101948785B1 (en) 2019-02-18

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Publication number Priority date Publication date Assignee Title
CN108856775A (en) * 2018-09-06 2018-11-23 山东镭鸣数控激光装备有限公司 A kind of Pneumatic clamping chuck
CN112719328B (en) * 2020-12-22 2024-04-12 上海纳错机械制造厂 Modularized step chuck
CN113199049A (en) * 2021-05-14 2021-08-03 常州机电职业技术学院 Four-claw centering clamping lathe fixture of automobile front steel plate spring support
CN114131386B (en) * 2021-12-01 2024-05-24 浙江金汤机床有限公司 Numerical control special lathe for efficiently machining multichannel pipe fitting and valve and working method thereof

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JPH01258685A (en) * 1988-04-07 1989-10-16 Sumitomo Pharmaceut Co Ltd Cephem based compound
KR101008853B1 (en) * 2008-07-28 2011-01-19 주식회사 삼천리기계 A Hydraulic Chuck

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