KR20170109351A

KR20170109351A - Gripper

Info

Publication number: KR20170109351A
Application number: KR1020160033359A
Authority: KR
Inventors: 김정희
Original assignee: 케이시시정공 주식회사
Priority date: 2016-03-21
Filing date: 2016-03-21
Publication date: 2017-09-29
Also published as: KR101784923B1

Abstract

The present invention relates to a gripper, and more specifically, relates to a gripper, comprising: a body which has two or more sliding channels formed on the same surface around a center hole in the center and which also has a dividing wall inside; a dust cover installed in the center on a top surface of the body; a plurality of jaws horizontally slid along a the sliding channels of the body; a plunger which comprises: a cylindrical unit which penetrates the dividing wall of the body to vertically move; and a wedge unit formed on a top end of the cylindrical unit to vertically move within the sliding channels and make the jaws slide; a supporter which comprises: a ring unit installed on a top surface of the dividing wall of the body to come in contact with an external side surface of the plunger; and a leg installed on a top surface of the ring unit to have an external side surface coming in contact with an internal wall surface of the body, which forms the center hole, and an internal side surface coming in contact with an external side surface of the cylindrical unit; a piston connected to a bottom end of the cylindrical unit to vertically move and make the plunger vertically move; and a base cover installed on a bottom surface of the body. The present invention is able to minimize the transverse shaking when the plunger vertically moves.

Description

Gripper {Gripper}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gripper, and more particularly, to a gripper capable of minimizing swinging of a plunger that moves up and down.

Objects with holes in the interior, such as tires and cylinder blocks of automotive engines, are typically gripped by inserting a gripper inside the hole and then spreading the jaw from inside to outside.

These grippers open or jam the jaws to hold or grasp the objects. At this time, the plunger must move up and down as shown in Registration Practice No. 20-0228434 in order to open or close the jaws.

When the plunger moves up and down in this way, the plunger is shaken to the left and right due to the spaced gap between the body and the plunger, so that the holding state of the object becomes unstable or the jaws are broken.

Application No.: 20-2001-000030 (registration number: 20-0228434, name of invention: hand gripper)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a gripper capable of stably holding an object by minimizing swaying of a plunger in a vertical direction when the plunger moves up and down.

According to an aspect of the present invention, there is provided a gripper comprising: a body having two or more sliding channels formed on the same plane with a center hole at the center thereof, the partition having a partition wall; A dust cover installed at the center of the upper surface of the body; A plurality of jaws slid horizontally along a sliding channel of the body; A plunger formed at an upper end of the cylindrical portion and having a wedge portion for sliding the jaw by moving in a vertical direction within the sliding channel; A ring portion provided on the upper surface of the partition wall of the body and closely attached to the outer surface of the cylindrical portion of the plunger; a ring portion provided on the upper surface of the ring portion so as to be in contact with an inner wall surface of the body forming the center hole, A supporter made of a leg which is in close contact with an outer surface of the cylindrical portion; A piston connected to a lower end of the cylindrical portion and moving in a vertical direction to move the plunger in a vertical direction; And a base cover installed on the lower surface of the body.

Here, the dust cover has an insertion groove formed in its bottom surface, and the upper end of the leg of the supporter is inserted into the insertion groove.

In addition, the partition wall of the body is formed with an O-ring groove in which an O-ring is installed, a seating groove in which a ring portion of the supporter is seated on the upper surface is formed larger than a diameter of the O-ring groove, The ring portion prevents the O-ring from being released to the outside.

The wedge portion of the plunger is formed with an oblique projection on its outer surface. The jaw has an inclined groove into which the oblique projection is inserted. When the plunger rises, the oblique projection rises along the oblique groove, And when the plunger is lowered, the inclined projections descend along the inclined grooves, so that the gap between the jaws becomes close to each other.

According to the gripper of the present invention constructed as described above, the supporter installed between the body and the plunger minimizes the swinging motion of the plunger when the plunger moves up and down, thereby stably holding the object, There is an advantage that breakage can be prevented from occurring due to distribution.

Further, the supporter can be stably installed in the inside of the body because the ring portion is seated in the seating groove and the upper end of the leg is inserted into the insertion groove of the dust cover, thereby advantageously guiding the vertical movement of the plunger more stably .

In addition, since the mounting groove having a diameter larger than that of the O-ring groove is formed on the upper side of the O-ring groove, the O-ring groove can be more easily exposed to the outside, thereby making it easier to observe and measure the O- There is an advantage to be able to.

1 is a perspective view showing an embodiment of a gripper according to the present invention.
2 is an exploded perspective view of the gripper shown in Fig.
3 is a view showing the body section of the gripper shown in Fig.
4 is a view showing a connection relationship between a plunger and a supporter of the gripper shown in Fig.
Figs. 5A and 5B are views showing a state in which the jaws of the gripper shown in Fig. 1 are opened. Fig.
FIGS. 6A and 6B are diagrams showing the gripper of FIG. 1 when the jaws are closed. FIG.
7 is a perspective view showing another embodiment of the gripper according to the present invention.
8 is an exploded perspective view of the gripper shown in Fig.
9 is a view showing the body section of the gripper shown in Fig.
10 is a view showing a connection relationship between a plunger and a supporter of the gripper shown in Fig.
Figs. 11A and 11B are views showing a state in which the jaws of the gripper shown in Fig. 7 are opened. Fig.
Figs. 12A and 12B are diagrams showing a state in which the jaws of the gripper shown in Fig. 7 are closed. Fig.

Hereinafter, embodiments of the gripper according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a gripper according to the present invention, FIG. 2 is an exploded perspective view of the gripper shown in FIG. 1, and FIG. 3 is a view showing a body section of the gripper shown in FIG.

4 is a view showing a connection relationship between a plunger and a supporter of the gripper shown in Fig. 1, Figs. 5A and 5B are views showing a state in which the jaws of the gripper shown in Fig. 1 are opened, FIG. 6B is a view showing the gripper of FIG. 1 when the jaws are closed. FIG.

FIG. 7 is a perspective view showing another embodiment of the gripper according to the present invention, FIG. 8 is an exploded perspective view of the gripper shown in FIG. 7, and FIG. 9 is a view showing the body section of the gripper shown in FIG.

Fig. 10 is a view showing the connection relationship between the plunger and the supporter of the gripper shown in Fig. 7, Figs. 11a and 11b are views showing a state in which the jaw of the gripper shown in Fig. 7 is opened, FIG. 12B is a view showing the gripper of FIG. 7 when the jaws are closed. FIG.

A gripper according to the present invention is used when gripping and transporting objects such as a tire or a cylinder block of an automobile engine. The gripper includes a body 10, a dust cover 20 installed on the upper surface of the body 10, A plurality of jaws 30 slid horizontally in the body 10, a plunger 40 slid in the body 10 in the vertical direction, and a supporter 40 surrounding the plunger 40. [ A piston 60 connected to the lower end of the plunger 40 and a base cover 70 installed on the lower surface of the body 10. The piston 60 is connected to the lower end of the plunger 40,

The body 10 is formed with a center hole 11 at the center thereof and two or more sliding channels 12 are formed on the same plane with the center hole 11 as a center and a partition wall 13 is provided therein And a piston hole (14) is formed below the partition wall (13).

The center hole 11 is formed on the inner upper side of the body 10 with respect to the partition wall 13 and the leg 52 of the supporter 50 to be described later is located in the center hole 11.

The sliding channel 12 is formed to communicate with the center hole 11 and is formed on the upper surface of the body 10. At least two of the sliding channels 12 are formed, and the ends of the respective sliding channels 12 are connected to the center hole 11. More specifically, the sliding channels 12 are formed so that the intervals between the sliding channels 12 are equal to each other around the center hole 11. 1 to 6B, the sliding channels 12 are formed at an interval of 180 degrees from each other. When the sliding channels 12 are formed at intervals of 180 degrees from each other as shown in FIGS. 7 to 12B, The distance between the sliding channels 12 is 120 degrees.

The partition wall 13 is horizontally disposed at an inner central portion of the body 10. The center hole 11 and the sliding channel 12 are formed on the partition wall 13, And a piston hole 14 is formed on the lower side.

The partition wall 13 has an O-ring groove 13a formed therein, and a seating groove 13b formed on an upper surface thereof.

The O-ring groove 13a is a portion where the O-ring 13c is installed and is formed in a circular shape around the portion passing through by the cylindrical portion 41 of the plunger 40 described later. The O-ring 13c provided in the O-ring groove 13a thus formed prevents leakage between the cylindrical portion 41 of the plunger 40 and the body 10, that is, between the outer surface of the cylindrical portion 41 and the partition wall 13 .

The seating groove 13b is formed in a circular shape on the upper side of the O-ring groove 13a. The seating groove 13b has a larger diameter than the O-ring groove 13a. Since the diameter of the seating groove 13b is larger, observation and measurement of the O-ring groove 13a can be facilitated from the outside. A ring portion 51 of a supporter 50 to be described later is seated in the O-ring groove 13a.

The piston hole 14 is formed inside the body 10 and is formed below the partition wall 13 and the piston 60 is installed in the piston hole 14.

The dust cover 20 is installed at the center of the upper surface of the body 10 and blocks foreign substances from entering into the body 10 through the center hole 11. The dust cover 20 has an insertion groove 20a formed in its bottom surface.

The jaw 30 is installed inside the sliding channel 12 of the body 10 and slides horizontally along the sliding channel 12. Since a plurality of sliding channels 12 are formed in the body 10, the number of jaws 30 is the same as the number of the sliding channels 12. The plurality of jaws 30 are inserted into the holes of a product such as a tire or a cylinder block. In this state, the jaws 30 are spaced apart, pick up the objects, and lower the objects that are picked up as the intervals become narrower.

The jaw 30 is formed with an inclined groove 30a inclined at a predetermined angle.

The plunger 40 includes a cylindrical portion 41 and a wedge portion 42 integrally formed on the upper end of the cylindrical portion 41.

The cylindrical portion 41 has a cylindrical shape and moves through the intermediate portion of the partition wall 13 of the body 10 in the vertical direction. Therefore, the cylindrical portion 41 reciprocates between the center hole 11 and the piston hole 14.

Unlike the cylindrical portion 41, the wedge portion 42 does not pass through the partition wall 13, as the width of the wedge portion 42 decreases toward the upper end. The cylindrical portion 41 is always positioned above the partition wall 13 and moves up and down in the sliding channel 12. [ In this way, the sliding channel 12 moves upward and downward to slide the jaws 30.

More specifically, the wedge portion 42 has an inclined projection 42a inclined at a predetermined angle to the outer surface of the wedge portion 42. The inclined projection 42a is inserted into the inclined groove 30a formed in the jaw 30, do.

Since the inclined projection 42a of the wedge portion 42 is inserted into the inclined groove 30a of the jaw 30 as described above, when the plunger 40 is raised, the inclined projection 42a is inclined toward the inclined groove 30a, When the plunger 40 is lowered, the inclined projections 42a descend along the inclined grooves 30a so that the gap between the jaws 30 is short Loses.

The supporter 50 is installed between the plunger 40 and the body 10 to prevent the plunger 40 from shaking from the body 10 when the plunger 40 moves up and down. In other words, there is a clearance between the plunger 40 and the body 10, so that when the plunger 40 moves up and down in this state, it is shaken due to the gap. The supporter 50 is provided with a ring portion 51 and a leg 52 integrally protruding from the upper surface of the ring portion 51. [

The ring portion 51 has a circular ring shape and is provided on the upper surface of the partition wall 13. [ More specifically, the ring portion 51 is provided in the seating groove 13b formed on the upper surface of the partition wall 13. As shown in Fig. When the ring portion 51 of the supporter 50 is installed in the seating groove 13b, the bottom surface of the ring portion 51 is positioned above the O-ring 13c provided in the O-ring groove 13a, 13a to the outside. The outer surface of the ring portion 51 is in close contact with the inner wall surface of the partition wall 13 forming the seating groove 13b so that the inner surface of the ring portion 51 is not easily shaken by the external force, (41).

A plurality of the legs 52 are spaced apart from the ring portion 51. The outer surface of the leg 52 is in close contact with the inner wall surface of the body 10 forming the center hole 11, As shown in FIG.

In other words, if the number of the sliding channels 12 is two, two legs 52 are formed to face each other. If the number of the sliding channels 12 is three, three legs 52 are also formed Each leg 52 is spaced 120 degrees apart. Since the legs 52 are provided so as to be spaced apart from each other, a spacing gap 52a is formed between the legs 52. The wedge portion (42) of the plunger (40) penetrates the clearance (52a). Therefore, the wedge portion 42 of the plunger 40 is not disturbed by the supporter 50 when the plunger 40 moves up and down.

When the legs 52 are installed on the body 10, a part of the upper end of the legs 52 is exposed to the upper side of the body 10. The exposed portions of the legs 52 are inserted into the insertion grooves 20a . As a result, the supporter 50 can be installed more stably in the body 10.

The piston 60 is coupled to the lower end of the cylindrical portion 41 and moves in the vertical direction inside the piston hole 14 of the body 10. That is, hydraulic pressure or pneumatic pressure is supplied or discharged into the piston hole 14, and the piston 60 moves up and down in the piston hole 14. By this movement, the plunger 40 moves in the vertical direction .

The base cover 70 is installed on the bottom surface of the body 10 to seal the piston hole 14.

10: Body 11: Center hole
12: Sliding channel 13: Compartment wall
13a: O-ring groove 13b: Seated groove
13c: O-ring 14: Piston hole
20: dust cover 20a: insertion groove
30: jaw 30a: inclined groove
40: plunger 41: cylindrical portion
42: wedge portion 42a: oblique projection
50: supporter 51: ring part
52: leg 52a: separation gap
60: piston 70: base cover

Claims

A body 10 having two or more sliding channels 12 formed on the same plane around a central center hole 11 and having a partition wall 13 therein;
A plurality of jaws 30 slid horizontally along the sliding channels 12 of the body 10;
A cylindrical portion 41 which moves vertically through the partition wall 13 of the body 10 and a vertical portion which is formed at the upper end of the cylindrical portion 41 and moves in the vertical direction in the sliding channel 12 A plunger 40 comprising a wedge portion 42 for sliding the jaw 30;
A ring portion 51 provided on the upper surface of the partition wall 13 of the body 10 to be in close contact with the outer surface of the cylindrical portion 41 of the plunger 40, A supporter 50 having a side surface which is in close contact with an inner wall surface of the body 10 forming the center hole 11 and whose inner surface is in close contact with the outer surface of the cylindrical portion 41;
A piston (60) connected to a lower end of the cylindrical portion (41) to move the plunger (40) in a vertical direction by moving in a vertical direction;
And a base cover (70) installed on a lower surface of the body (10).

The method according to claim 1,
A dust cover (20) is installed at the center of the upper surface of the body (10)
Wherein the dust cover 20 has an insertion groove 20a at its bottom so that the upper end of the leg 52 of the supporter 50 is inserted into the insertion groove 20a.

The method according to claim 1,
The partition wall 13 of the body 10 is formed with an O-ring groove 13a in which an O-ring 13c is installed and a seating groove 13b in which a ring portion 51 of the supporter 50 is seated. Is larger than the diameter of the O-ring groove (13a)
The ring portion (51) of the supporter (50) seated in the seating groove (13b) prevents the o-ring (13c) from being detached from the outside.

The method according to claim 1,
The wedge portion 42 of the plunger 40 is formed with an oblique projection 42a on an outer side surface thereof and an inclined groove 30a into which the oblique projection 42a is inserted is formed in the jaw 30,
When the plunger 40 is lifted up, the slanting protrusion 42a rises along the slanting groove 30a so that the distance between the jaws 30 is increased. When the plunger 40 is lowered, the slanting protrusions 42a ) Descend along the inclined grooves (30a) so that the gap between the jaws (30) becomes close to each other.