KR102608444B1 - Tip installation device - Google Patents

Abstract

The present invention relates to a tip fastening device that allows fastening to a target tool such as a cutter or welder through a threaded portion by rotating a replacement tip, and includes a base body portion, rotatably provided on the base body portion, and accommodating the replacement tip. A rotating body provided with a tip receiving portion, a plurality of clamps that are arranged to be spaced apart from each other around the inner circumference of the tip receiving portion and are rotatably connected to the rotating body, and hold the outside of the replacement tip accommodated in the tip receiving portion in a pressurized state, It is provided on the rotating body to be able to move up and down, and is connected to a plurality of clamp jaws and moves up and down, linking the plurality of clamp jaws to rotate to control whether or not the replacement tip is gripped. Provided is a tip fastening device including an elastic support portion that elastically supports the grip adjustment portion.

Description

Tip installation device

The present invention relates to a tip fastening device that automatically fastens the tip of a plasma cutter or welder when the tip needs to be replaced.

Generally, when plasma cutting or welding is performed with a welding machine, wear of the tip of the cutting machine or welding machine occurs after a certain usage time.

Wear of the tips of plasma cutters or welders interferes with stable plasma generation and causes cutting or welding defects, so the tips need to be replaced on a regular basis.

Here, if you try to replace the cutting machine or welding machine tip by hand, the replacement takes time and effort, and the operation rate of the equipment is significantly reduced. Accordingly, research, improvement and commercialization of tip fastening devices that can automatically fasten tips to cutters or welders are progressing.

However, in the case of a conventional tip fastening device, it is difficult to transmit a constant fastening torque when fastening the tip through the threaded part of a target tool such as a cutter or welder, and the threaded part of the tip and the target tool are crushed, resulting in a stable fastening state between the tip and the target tool. There is a problem that is difficult to maintain.

Related technology for this tip fastening device is presented in Republic of Korea Patent Publication No. 10-2022-0161002 (December 6, 2022).

The purpose of the present invention is to provide a tip fastening device that enables stable fastening of the tip to the target tool when replacing the tip to be replaced with the target tool.

The present invention relates to a tip fastening device that fastens a target tool, such as a cutter or a welder, through a threaded portion by rotating a replacement tip, comprising a base body portion, rotatably provided on the base body portion, and the replacement tip. A rotating body provided with a tip receiving portion, rotatably connected to the rotating body while being spaced apart from each other around an inner circumference of the tip receiving portion, and holding the outer side of the replacement tip accommodated in the tip receiving portion in a pressurized state. A plurality of clamp jaws, provided to be able to move up and down on the rotating body, and connected to the plurality of clamp jaws to move up and down, interlocking the plurality of clamp jaws to rotate, and controlling whether or not to grip the replacement tip; Provided is a tip fastening device including an elastic support part provided on the rotating body to be connected to the grip control unit and elastically supporting the grip control unit.

In addition, the elastic support portion elastically supports the grip adjuster in a downward pushed state before the replacement tip is fastened to the target tool and while the replacement tip is being fastened to the target tool by rotating the rotating body, and When fastening of the replacement tip to the target tool is completed, the grip adjustment unit may be elastically supported so that the grip adjustment unit can be moved upward by a certain area so that the pressing force on the replacement tip due to rotation of the clamp jaw is reduced.

In addition, the elastic support portion may be disposed on the inside of the rotating body, and may be provided on the grip adjusting portion to contact the elastic support portion, and may include a connecting member that transmits a pushing force downward from the elastic support portion to the grip adjusting portion. You can.

Additionally, the clamp jaw may be provided with a locking protrusion that catches on the outer surface of the replacement tip.

In addition, the clamp jaw is formed with an interlocking groove connected to the grip control unit, and can be rotated clockwise or counterclockwise depending on the vertical movement direction of the grip control unit.

In addition, the clamp jaw is provided in a protruding state so as to face each other on the upper and lower sides of the interlocking groove, and is provided with a pair of connecting protrusions in contact with the grip adjustment part and extending from the interlocking groove in the inner direction of the clamp jaw. , It may include a gap space portion that prevents interference when the clamp jaw is rotated by the grip control portion.

In addition, the grip control unit may include an adjustment shaft member disposed to penetrate the rotating body, and an adjustment connection member provided on the adjustment shaft member and a portion of which is inserted into the interlocking groove.

Additionally, the rotating body rotates around the rotating shaft provided in the base body portion, and the adjustment connection member may be disposed lower than the rotating shaft.

Additionally, the elastic support member may be a spring member.

In addition, it may further include a rotation actuator that is connected to the rotating body and generates a driving force to rotate the rotating body.

In addition, it may further include an adjustment actuator provided on the base body portion and generating a driving force so that the grip adjustment portion is pushed upward.

In addition, the base body part may further include a guide body part connected to be movable in the up and down direction, and a vertical movement actuator that generates a driving force to move the base body part in the up and down direction in the guide body part.

The tip fastening device according to the present invention has a rotating body rotatably provided on the base body, and the clamp jaw is rotatably connected to the rotating body and controls whether the replacement tip is gripped by interlocking with the up and down movement of the gripping control unit. do. At this time, the elastic support elastically supports the grip adjustment part so that it can rotate in a direction that reduces the pressing force of the replacement tip due to rotation of the clamp jaw when the replacement tip is completed attached to the target tool, thereby preventing damage at the connection portion between the replacement tip and the target tool. Stable fastening is possible without

1 is an overall cross-sectional view of a tip fastening device according to an embodiment of the present invention.
Figure 2 is an enlarged front view of portion 'A' shown in Figure 1.
Figure 3 is an enlarged view of part 'B' shown in Figure 2.
Figures 4 and 5 are diagrams showing the operation state of the clamp jaw according to the position of the grip control unit shown in Figure 3.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle of definability.

Referring to Figures 1 to 3, the tip fastening device according to an embodiment of the present invention includes a base body portion 100, a rotating body 200, a clamp jaw 300, and a grip adjusting portion 400. And it may include an elastic support part 500. In this tip fastening device of one embodiment, fastening is performed through the threaded portion of the target tool 20, such as a cutter or welder, and the threaded portion of the replacement tip 10, and specifically, the fastened portion of the target tool 20 and the threaded portion of the replacement tip 10. Fastening is performed by rotating the replacement tip 10 while the center of the replacement tip 10 is placed on the same straight line.

The base body portion 100 is a part that rotatably supports the rotating body 200. Here, the base body portion 100 may be provided as a plate or block having a hexahedral shape, but of course, it is not limited thereto.

As such, the base body portion 100 may be provided with a mounting groove 110 so that a portion of the entire area of the rotating body 200 in the vertical direction can be inserted and disposed.

In addition, the mounting groove 110 of the base body portion 100 is provided with a bearing member ( 120) may be provided.

Additionally, the base body portion 100 may be connected to the guide body portion 100a to be movable in the vertical direction. In this way, when the base body portion 100 is connected to the guide body portion 100a so as to be movable in the vertical direction, the vertical position of the replacement tip 10 accommodated in the tip receiving portion 210 of the rotating body 200 is adjusted. You can control it. Here, the base body portion 100 and the guide body portion 100a may be provided with a guide rail portion 101a that is movably connected in the vertical direction. Additionally, a support body 100b may be provided at the lower end of the guide body 100a to support the guide body 100a to be placed on the ground.

The rotating body 200 is a part that supports the replacement tip 10 while receiving it.

As such, the rotating body 200 may be rotatably provided on the base body portion 100. That is, the rotating body 200 is rotatably disposed in the mounting groove 110 of the base body 100. More specifically, the lower part of the entire vertical area of the rotating body 200 is the mounting groove 110. It can be rotatably disposed on the base body portion 100 in an inserted state.

Here, a tip accommodating portion 210 may be provided on the upper surface of the rotating body 200 to provide a space for accommodating the replacement tip 10.

In addition, the rotating body 200 may be provided with a hollow portion 220 penetrating in the vertical direction to be connected to the tip receiving portion 210. That is, the upper end of the hollow part 220 communicates with the lower part of the tip receiving part 210, and the lower end of the hollow part 220 is formed on the bottom of the rotating body 200.

The hollow portion 220 allows the adjustment shaft member 410 of the grip adjustment unit 400, which will be described later, to be inserted into the rotating body 200 in a state in which it can be slidably moved in the up and down directions. Here, an elastic insertion groove 221 communicating with the hollow portion 220 is formed on the bottom of the rotating body 200 to provide a space for accommodating the elastic support portion 500, which will be described later.

In addition, the rotating body 200 may be provided with a plurality of rotation shaft parts 230 that rotatably connect a plurality of clamp jaws 300, which will be described later. The plurality of rotation shaft units 230 may be provided at the top of the rotating body 200 to be spaced apart from each other around the tip accommodation unit 210 with the tip accommodation unit 210 as the center.

The clamp jaw 300 is a member that holds the replacement tip 10 accommodated in the tip receiving portion 210. These clamp jaws 300 may be composed of a plurality of clamp jaws 300 to enable stable gripping of the replacement tip 10, and each clamp jaw 300 may be rotatably provided on the rotating body 200. Here, the plurality of clamp jaws 300 may be rotatably connected to the rotation shaft portion 230 of the rotating body 200 so as to be spaced apart from each other around the tip receiving portion 210.

In this way, the plurality of clamp jaws 300 are rotatably connected to the rotation shaft portion 230 of the rotating body 200, and are attached to the tip receiving portion 210 according to the rotation direction around the rotation shaft portion 230. The received replacement tip 10 is held in a pressurized state or the pressure of the replacement tip 10 is released to release the holding state of the replacement tip 10.

Here, when the plurality of clamp jaws 300 are rotatably provided on the rotary shaft portion 230 of the rotating body 200, they are interlocked by receiving a moving force according to the vertical movement direction of the grip adjusting portion 400, which will be described later. Rotation takes place.

In addition, when the clamp jaw 300 is rotated to hold the replacement tip 10 in a pressurized state, it is inserted into a locking groove (not shown) formed on the outer surface of the replacement tip 10 and is caught with the replacement tip 10. A stopping protrusion 310 may be provided to achieve this. This locking protrusion 310 may be disposed on the upper side of the clamp jaw 300 based on the rotation shaft 230.

In addition, as described above, the clamp jaw 300 is provided with an interlocking groove 320 connected to the grip control unit 400 to rotate by receiving the moving force according to the vertical movement direction of the grip control unit 400. It can be. This interlocking groove portion 320 may be provided on the lower side of the clamp jaw 300 based on the rotation shaft portion 230.

In addition, the clamp jaw 300 may be provided with a connecting protrusion 321 and a gap space 322 to ensure stable rotation according to the vertical movement of the grip control unit 400.

The connection protrusions 321 are provided on the upper and lower sides of the inner surface of the interlocking groove 320 to face each other, and each connection protrusion 321 is provided on the upper and lower sides of the control connection member 420 of the grip adjustment unit 400. Each side is in contact with each other. At this time, each connection protrusion 321 may be provided to protrude in a curved shape.

The air gap portion 322 is a space extending from the interlocking groove portion 320 toward the inside of the clamp jaw 300. This gap space 322 is connected to the edge of the control connection member 420 of the grip control unit 400 and the clamp jaw 300 when the clamp jaw 300 is rotated due to the vertical movement of the grip control unit 400. It prevents interference and ensures stable rotation of the clamp jaw (300).

The grip control unit 400 is a member that controls whether or not the replacement tip 10 is gripped by the plurality of clamp jaws 300. That is, the grip control unit 400 moves in the vertical direction and is interlocked with the clamp jaws 300 so that the plurality of clamp jaws 300 rotate. Here, when the grip control unit 400 moves upward, the upper side of each clamp jaw 300 is moved away from the outer surface of the replacement tip 10 disposed in the tip receiving unit 210, centered on the rotation axis unit 230. By rotating it, the grip on the replacement tip 10 can be released. Conversely, when the grip control unit 400 moves downward, the upper side of each clamp jaw 300, centered on the rotation axis unit 230, is directed toward the outer surface of the replacement tip 10 disposed in the tip receiving unit 210. Rotate it so that a gripping state is achieved through pressure of the replacement tip (10).

The grip control unit 400 is connected to the plurality of clamp jaws 300 and may be provided on the rotating body 200 to be movable in the vertical direction. And, the grip control unit 400 may include an adjustment shaft member 410 and an adjustment connection member 420.

The control shaft member 410 is a member having a straight bar shape disposed through the rotating body 200 so as to be movable in the vertical direction of the rotating body 200. As such, the control shaft member 410 penetrates the rotary body 200 and is connected to the rotary body 200 so as to be movable in the vertical direction. The tip receiving portion 210 and the hollow portion 220 of the rotating body 200 It can be inserted and placed through .

The adjustment connection member 420 is provided on the adjustment shaft member 410 and is a member that transmits a moving force to the clamp jaw 300 when the adjustment shaft member 410 moves in the vertical direction. This adjustment connection member 420 is disposed in a locked state on the plurality of clamp jaws 300. More specifically, a portion of the adjustment connection member 420 is in the interlocking groove portion 320 of the clamp jaw 300. It is arranged to be inserted. In addition, in some areas of the adjustment connection member 420 inserted into the interlocking groove 320, the upper and lower sides come into contact with the connection protrusion 321 formed in the interlocking groove 320.

In addition, when the adjustment connection member 420 is provided on the adjustment shaft member 410, it is disposed lower than the position of the rotation shaft portion 230 of the rotating body 200, so that it follows the vertical movement of the adjustment shaft member 410. When a pushing or pulling force is transmitted to the clamp jaw 300, the plurality of clamp jaws 300 rotate around the rotation axis portion 230 to grip or grip the replacement tip 10 through the upper side of the clamp jaw 300. The state can be canceled.

Additionally, the control shaft member 410 of the grip control unit 400 may be provided with a connection member 430 that receives a downward pushing force from the elastic support unit 500. This connection member 430 may be provided at the lower end of the adjustment shaft member 410 so as to be placed in contact with the lower end of the elastic support portion 500. Here, when provided on the control shaft member 410, the connecting member 430 is interconnected to the control shaft member 410 through a threaded portion so that the position can be adjusted in the vertical direction according to the rotation direction of the control shaft member 410. It can be provided. In this way, the connecting member 430 can vary the pushing force transmitted from the elastic support part 500 while changing the up and down position on the adjusting shaft member 410, so that the replacement tip 10 through the clamp jaw 300 can be changed. It is possible to adjust the pressing force applied to the replacement tip 10 when gripping.

The elastic support part 500 is a part that elastically supports the grip control part 400. That is, the elastic support portion 500 pushes the grip adjusting portion 400 downward with a constant pushing force and maintains the gripping state of the replacement tip 10 accommodated in the tip receiving portion 210 of the rotating body 200 with a constant pressing force. make it possible

In more detail, the elastic support portion 500 rotates the replacement tip 10 to the target tool 20 and rotates the rotating body 200 to attach the replacement tip 10 to the target tool. When (10) is being fastened, the grip adjusting part 400 is elastically supported in a downward pushed state.

In addition, when fastening of the replacement tip 10 to the target tool 20 is completed through rotation of the rotating body 200, the elastic support portion 500 is connected to the tip receiving portion 210 of the rotating body 200. The grip control unit 400 is elastically supported to enable slippage of the replacement tip 10. In this way, when fastening of the replacement tip 10 and the target tool 20 is completed, the elastic support portion 500 moves the upper side of the clamp jaw 300 in a direction away from the replacement tip 10 based on the rotation axis portion 230. It is allowed to move within a certain range. Through this, when the replacement tip 10 is fully fastened to the target tool 20, the fixation by the pressurized state of the replacement tip 10 by the clamp jaw 300 is released, thereby increasing the rotational torque of the rotating body 200. It is possible to prevent damage to the threads of the replacement tip 10 and the target tool 20 while preventing it from being transmitted to the replacement tip 10.

The elastic support part 500 may be provided on the rotating body 200 to be connected to the grip control part 400. In more detail, the elastic support portion 500 may be disposed in the elastic insertion groove portion 221 of the rotating body 200. At this time, the upper end of the elastic support part 500 is arranged to contact the inner surface of the elastic insertion groove 221 of the rotating body 200, and the lower end of the elastic support part 500 is arranged to contact the upper surface of the connecting member 430, The elastic pushing force is transmitted downward from the elastic support unit 500 to the grip control unit 400.

Here, the elastic support part 500 can be applied as a spring member. More specifically, when placed in the elastic insertion groove part 221, the control shaft member 410 of the grip control part 400 can be placed in a penetrating state. Although it is shown that a coil spring is applied, it is of course not limited to this.

The tip fastening device according to one embodiment may include a rotation actuator 600, a control actuator 700, and an up/down actuator 800.

Here, the rotation actuator 600 is provided on the base body 100 to be connected to the rotating body 200, and generates a driving force so that the rotating body 200 rotates on the base body 100. The rotation actuator 600 may be composed of a motor 610 that generates rotational force, a reducer 620, and a link member 630 connecting the reducer 620 and the rotating body 200, but is not limited thereto. Of course.

The control actuator 700 is provided on the base body part 100 and generates a driving force to push the grip control part 400 upward. This control actuator 700 is applied as a hydraulic cylinder and pushes the control shaft member 410 of the grip control unit 400 upward according to the movement of the rod of the hydraulic cylinder to replace the tip 10 by the clamp jaw 300. ) allows the holding state to be released. Here, when the control actuator 700 does not transmit the pushing force to the grip control unit 400, the grip control unit 400 is maintained in a state in which the pushing force is transmitted downward through the elastic force of the elastic support unit 500. The gripping state of the replacement tip 10 by the clamp jaw 300 is maintained.

The vertical movement actuator 800 is provided on the guide body portion 100a to be connected to the base body portion 100, and provides a driving force so that the base body portion 100 moves in the vertical direction in the guide body portion 100a. generates This vertical movement actuator 800 is applied as a hydraulic cylinder, and the base body portion 100 is pushed upward or pulled downward according to the movement of the rod of the hydraulic cylinder, thereby changing the vertical position on the guide body portion 100a. Make them lose.

The operation of installing a replacement tip using the tip fastening device of an embodiment configured as described above will be described as follows.

First, the grip control part 400 is pushed upward, so that the clamp jaw 300 rotates around the rotation axis part 230 to accommodate the replacement tip 10 in the tip receiving part 210. do. At this time, the grip control unit 400 may be pushed upward by the control actuator 700.

Thereafter, the replacement tip 10 is placed in the tip receiving part 210 of the rotating body 200, and the pushing movement of the grip control unit 400 by the control actuator 700 is released.

Then, as shown in FIG. 4, the grip control unit 400 is pushed downward through the elastic force of the elastic support unit 500, causing the clamp jaw 300 to rotate around the rotation axis unit 230 and the tip receiving unit. The replacement tip 10 accommodated in 210 is gripped in a pressurized state.

Then, as the vertical movement actuator 800 operates, the base body portion 100 moves to place the replacement tip 10 in contact with the lower part of the target tool 20.

Thereafter, the replacement tip 10 and the target tool 20 are fastened while the rotating body 200 is rotated. At this time, the rotating body 200 may be rotated by the rotation actuator 600.

When the replacement tip 10 is completely fastened to the target tool 20, a torque greater than the appropriate torque is generated between the replacement tip 10 and the clamp jaw 300. Then, as shown in FIG. 5, the replacement tip 10 is gripped with the upper side of the clamp jaw 300 rotated around the rotation shaft 230 in a direction away from the outer surface of the replacement tip 10. do. Through this, even if the rotating body 200 is rotated after the fastening of the replacement tip 10 and the target tool 20 is completed, slip occurs between the replacement tip 10 and the clamp jaw 300, and the replacement tip ( The rotational fastening force to the fastening portion of 10) and the target tool 20 is no longer transmitted.

Afterwards, the gripping control unit 400 is again pushed and moved upward by the adjusting actuator 700, and the gripping state of the replacement tip 10 by the clamp jaw 300 is released, and then the up and down actuator 800 As the base body portion 100 is moved, the fastening operation of the replacement tip 10 is completed.

As such, in the tip fastening device of one embodiment, the rotating body 200 is rotatably provided on the base body portion 100, and the clamp jaw 300 is rotatably connected to the rotating body 200 for grip control. Whether or not the replacement tip 10 is gripped is controlled in conjunction with the vertical movement of the unit 400. At this time, the elastic support portion 500 adjusts the grip so that the pressing force of the replacement tip 10 due to rotation of the clamp jaw 300 is reduced when the fastening of the replacement tip 10 to the target tool 20 is completed. By elastically supporting the part 400, stable fastening of the replacement tip 10 and the target tool 20 is possible without causing damage at the fastening portion.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached claims.

10: Replacement tip 20: Target tool
100: base body part 100a: guide body part
110: Mounting groove 120: Bearing member
200: Rotating body 210: Tip receiving portion
220: hollow part 221: elastic insertion groove part
230: Rotating shaft 300: Clamp jaw
310: Stumbling protrusion 320: Interlocking groove
321: connection protrusion 322: void space
400: grip control unit 500: elastic support unit
600: rotation actuator 700: adjustment actuator
800: Shanghai-dong actuator

Claims (12)

In a tip fastening device that fastens a target tool such as a cutter or welder through a threaded portion by rotating a replacement tip,
Base body part;
a rotating body rotatably provided on the base body and provided with a tip receiving portion for accommodating the replacement tip;
a plurality of clamp jaws disposed spaced apart from each other around the inner circumference of the tip receiving portion, rotatably connected to the rotating body, and gripping the outer side of the replacement tip accommodated in the tip receiving portion in a pressurized state;
a gripping control unit provided on the rotating body to be able to move up and down, connected to the plurality of clamp jaws and moving up and down, interlocking the plurality of clamp jaws to rotate to control whether or not the replacement tip is gripped;
An elastic support part provided on the rotating body to be connected to the grip control unit and elastically supports the grip control unit,
The clamp jaw is formed with an interlocking groove connected to the grip control unit, and rotates clockwise or counterclockwise according to the vertical movement direction of the grip control unit,
The grip adjusting unit is a tip fastening device including an adjusting shaft member disposed to penetrate the rotating body, and an adjusting connection member provided on the adjusting shaft member and a portion of which is inserted into the interlocking groove.
In claim 1,
The elastic support part
Before the replacement tip is fastened to the target tool and while the replacement tip is being fastened to the target tool by rotating the rotating body, the grip adjuster is elastically supported in a downward pushed state,
Tip fastening comprising elastically supporting the grip control unit so that the grip control unit can be moved upward by a certain area so that the pressing force of the replacement tip due to rotation of the clamp jaw is reduced when fastening of the replacement tip to the target tool is completed. Device.
In claim 1 or claim 2,
The elastic support portion is disposed inside the rotating body,
A tip fastening device including a connection member provided on the grip control part to contact the elastic support part and transmitting a pushing force downward from the elastic support part to the grip control part.
In claim 1,
The clamp jaw is a tip fastening device provided with a locking protrusion that catches on the outer surface of the replacement tip.
delete In claim 1,
The clamp jaw is
A pair of connecting protrusions provided on the upper and lower sides of the interlocking groove in a protruding state so as to face each other and in contact with the grip adjustment portion;
A tip fastening device including an air gap portion that extends from the interlocking groove toward the inside of the clamp jaw to prevent interference when the clamp jaw is rotated by the grip adjuster.
delete In claim 1,
The rotating body rotates around a rotating shaft provided in the base body portion,
The adjustment connection member is a tip fastening device disposed lower than the rotation shaft portion.
In claim 1,
The elastic support is a tip fastening device that is a spring member.
In claim 1,
A tip fastening device further comprising a rotation actuator connected to the rotating body and generating a driving force to rotate the rotating body.
In claim 1,
The tip fastening device is provided on the base body and further includes an adjustment actuator that generates a driving force to push and move the grip adjustment unit upward.
In claim 1,
A tip fastening device further comprising a guide body part connected to the base body part so that it can move in the up and down direction, and a vertical movement actuator that generates a driving force to move the base body part in the up and down direction in the guide body part.

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