KR100832497B1 - Pulling system of piston rod for a shock absorber manufacturing process - Google Patents

Abstract

The present invention relates to a tensioning system of a piston rod for a shock absorber manufacturing process, wherein a shock absorber (1) in which oil and a piston rod assembly are assembled to an inner and outer tube assembly is mounted on a pallet (100) and loaded ( 200, the frame 210 installed vertically on the base 200, the clamping device 300 installed on both sides of the frame 210 to center and fix the shock absorber 1, and the frame 210. Installed on the chucking device 400 and chucking the rolling part 31 of the piston rod 30 and the piston rod 30 when the piston rod 30 is tensioned. It includes an oil seal pressing device 500 for pressing the upper surface of the oil seal 40 so that the oil seal 40 is not in close contact with each other. Therefore, by caulking or welding the piston rod in the longest pulled state by the automation system in the manufacturing process of the shock absorber, there is an effect of improving productivity and quality.

Description

Tensioning System of Piston Rod for Shock Absorber Manufacturing Process {PULLING SYSTEM OF PISTON ROD FOR A SHOCK ABSORBER MANUFACTURING PROCESS}

1 is a cross-sectional view showing the inside of a conventional shock absorber,

Figure 2 is a front view of the tensioning system of the piston rod for the shock absorber manufacturing process according to the present invention,

3 is a partial excerpt front view of the clamping device according to the present invention;

4 is a partial plan view of the clamping device according to the present invention;

5 is an enlarged front view of the chucking device according to the present invention;

6 is a rear view of the chucking device according to the present invention;

7 is a partial plan view of the chucking device according to the present invention;

8 is an enlarged front view of the oil seal pressing device according to the present invention,

9 is a side view of the oil seal pressing device according to the present invention,

10 is a bottom view of the jig of the oil seal pressing device according to the present invention.

<Description of the code | symbol about the principal part of drawing>

1: Shock absorber 100: Pallet

200: base 210: frame

300: clamping device 302: bracket                 

304: air cylinder 306: clamping block

308: groove 310: lower plate

312: LM guide 400: chucking device

402, 502: fixed block 404, 504: plate

406 and 506 Servo motor 408 and 508 Ball screw shaft

410, 510: nut housing 411: vertical bracket

412: Horizontal bracket 414, 514: Rail block

416, 516: LM rail 418: chucking member

420: encounter 422, 518: cylinder

424: proximity sensor 426: post

427: spring 500: oil seal pressing device

512: moving plate 520: guide rail

522: push bar 524: jig

The present invention relates to a tensioning system of the piston rod for the manufacturing process of the shock absorber, and more particularly to a tensioning system of the piston rod for the shock absorber manufacturing process, which is an improvement of the oil-type shock absorber manufacturing process.

In general, shock absorbers are installed between the axle and the body to absorb vibrations or shocks received by the axle from the road surface to improve ride comfort. It is filled to increase the damping force, and oil-filled hydraulic shock absorbers are commonly used.

1 is a cross-sectional view showing the inside of a conventional shock absorber. As shown in the drawing, a conventional shock absorber (1) in which a spring (2) is supported and mounted on an outer circumference by an upper spring sheet (3) and a lower spring sheet (4), respectively, is filled with an oil-filled inner tube. (20), an outer tube (10) half filled with oil on the outside thereof, and a piston rod (30) having one end inserted into the inner tube (20) and the other end extending outside the outer tube (10), and a piston At the end of the rod 30, a piston valve 32 for generating a damping force is provided.

In addition, an oil seal 40 is installed at an upper end of the outer tube 10 to prevent leakage of oil and gas. The lower part of the oil seal 40 guides the up and down movement of the piston rod 30, and at the same time, the piston rod ( A rod guide 50 for supporting 30 in the lateral direction is provided.

In the assembly process for manufacturing the shock absorber 1 having such a configuration, after assembling the assembly of the oil and the piston rod 30 to the tube assembly of the outer tube 10 and the inner tube 20, caulking or welding The process will be carried out.

On the other hand, before performing the caulking or welding process of the above assembly process, the piston rod 30 must be pulled out in the longest state. This is because when oil is injected in the state where the piston rod 30 is lowered than the initial assembly state and the seal is made by caulking or welding, the operator then pulls back the piston rod 30 arbitrarily to return to the length of the state again when sealing. do. If the product is assembled in this state can not be properly mounted on the vehicle, the shock absorber 1 is treated as defective.

However, the assembly process is delayed or often the piston rod 30 is lowered by its own weight. Therefore, when the worker delays assembly, the piston rod 30 is manually pulled out to the longest state, and there is an inconvenience in that caulking or welding must be performed.

The present invention is to solve the conventional problems as described above, the tension of the piston rod for the shock absorber manufacturing process to be caulking or welding in the state that the piston rod is the longest pulled out by the automated system in the manufacturing process of the shock absorber. The purpose is to provide a system.

In order to achieve the above object, the present invention, in the tensioning system of the piston rod for the manufacturing process of the shock absorber, the shock absorber in which the oil and the piston rod assembly is assembled to the assembly of the inner and outer tubes is mounted on the pallet. A base, a frame installed vertically on the base, a clamping device installed on both sides of the frame to center and fix the shock absorber, and a chucking device installed on the frame to chuck the rolling part of the piston rod to move up and down; It is provided on the frame provides a tensioning system of the piston rod for the shock absorber manufacturing process including an oil seal pressing device for pressing the upper surface of the oil seal so that the oil seal in close contact with the piston rod when the piston rod is tensioned.

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

Figure 2 is a front view of the tensioning system of the piston rod for the shock absorber manufacturing process according to the present invention, Figure 3 is a partial excerpt front view of the clamping device according to the invention, Figure 4 is a partial extract plan view of the clamping device according to the invention 5 is an enlarged front view of the chucking device according to the present invention, FIG. 6 is a rear view of the chucking device according to the present invention, FIG. 7 is a partial plan view of the chucking device according to the present invention, and FIG. 8 is according to the present invention. An enlarged front view of the oil seal pressing device, FIG. 9 is a side view of the oil seal pressing device according to the present invention, and FIG. 10 is a jig bottom view of the oil seal pressing device according to the present invention.

As shown in FIG. 2, the tensioning system of the piston rod for the shock absorber manufacturing process is installed vertically on the base 200 and the base 200 on which the shock absorber 1 is seated and loaded on the pallet 100. The frame 210, the clamping device 300 for centering and fixing the shock absorber 1 on the pallet 100, and the chucking device for chucking the rolling part 31 of the piston rod 30 to move up and down ( 400 and the oil seal pressing device 500 which presses the upper surface of the oil seal 40 is large.

Here, the square base 200 is installed to pass the conveyor 110 across, and a plurality of pallets 100 are installed on the conveyor 110 to be transported.

And the shock absorber (1) in which the oil and the piston rod (30) assembly is assembled to the assembly of the inner tube (20) and the outer tube (10) by a non-illustrated SCARA robot on the pallet (100).

The frame 210 is installed in the vertical direction at each corner of the base 200.                     

A plurality of clamping devices 300 for clamping the shock absorber 1 are installed at both sides of the frame 210.

The clamping device 300 is moved forwards and backwards by the operation of the air cylinder 304, and is fixed so as not to shake after centering at both sides of the outer tube 10.

As illustrated in FIGS. 3 and 4, the clamping device 300 includes a bracket 302 fixed on the frame 210, and an air cylinder 304 is installed on the bracket 302.

One end of the air cylinder 304 is provided with a clamping block 306 that can fix the upper end of the outer tube (10). The clamping block 306 has a rectangular plate shape, the end of which is formed with a groove 308 of the letter "V".

The lower plate 310 of the rectangular plate is connected to the lower surface of the bracket 302, and the LM guide 312 is installed on the lower plate 310 to guide the forward and backward movement of the clamping block 306.

And the chucking device 400 is installed on the upper side of the frame 210.

5, 6 and 7, the chucking device 400 includes a plurality of fixing blocks 402 fixed to the frame 210 spaced apart in the axial direction by a predetermined distance, and the fixing blocks 402. The plate 404 is vertically installed on the front side of the plate.

The servo motor 406 is installed on the upper portion of the plate 404, and the ball screw shaft 408 connected to the shaft joint is connected to the motor shaft of the servo motor 406 to the lower side.

The nut housing 410 is moved up and down along the screw on the ball screw 408, and the vertical bracket 411 and the horizontal bracket 412 orthogonal to the vertical bracket 411 on the front side of the nut housing 410 is provided. It is fixed by welding or the like.

And the rear side of the vertical bracket 411, the rail block 414 is installed in the orthogonal direction from the plate 404, the LM rail 416 for guiding the lifting and lowering movement along the rail block 414 is installed.

A chucking member 418 is installed below the horizontal bracket 412 to move up and down in the axial direction to chuck the piston rod 30.

At the lower end of the chucking member 418, a pair of jaws 420 are rotatably installed so as to grasp the rolling part 31 of the piston rod 30, and the pair of jaws 420 is a cylinder 422. The jaw 420 is opened during the forward movement of the cylinder 422, and is retracted to the back of the cylinder 422 to chuck the object.

In addition, the proximity sensor 424 protrudes from the center lower end of the chucking member 418 having the jaws 420. The proximity sensor 424 is in contact with the rolling section 31 when the chucking member 418 descends to determine whether the proximity sensor 424 is a product set in the servo region. The proximity sensor 424 has a spring cushion in the predetermined servo region. Must be detected before the next operation can proceed.

In addition, the post 426 penetrating in the vertical direction to the horizontal bracket 412 is provided.

This post 426 is to prevent the overload occurs in the servo motor 406 by changing the rising position of the piston rod 30 for each product, substantially four of the corners of the horizontal bracket 412 A spring 427 is mounted on the outer circumferential surface thereof.                     

As shown in FIGS. 8 and 9, the oil seal pressing device 500 includes a fixing block 502 on the frame 210, and a plate 504 on the front side of the fixing block 502. .

Servo motor 506 is installed on one side of the plate 504, the ball screw shaft 508 is connected to the motor shaft of the servo motor 506 is connected to the lower side.

The nut housing 510 is installed on the ball screw shaft 508, and a movement plate 512 that is moved up and down is installed at one side of the nut housing 510.

The rail block 514 is provided in the orthogonal direction from the plate 504 at the front side of this moving plate 512, and the LM rail 516 which guides a raise / lower movement along the rail block 514 is provided.

And the cylinder 518 is installed on the moving plate 512, the guide rail 520 is installed in the cylinder 518 is provided with a push bar 522 that is moved forward and backward in accordance with the operation of the cylinder 518, One end of the push bar 522 is provided with a jig 524.

Jig 524 is formed in a cylindrical shape with one side open as shown in Figure 10, the diameter is formed less than the inner diameter of the outer tube 10 to press the oil seal 40 inside the outer tube 10 from above Done.

On the other hand, the servo sections 406 and 506 of the chucking device 400 and the oil seal pressing device 500 are already set in consideration of the total length of the shock absorber 1 for each product.

Operation of the tensioning system of the piston rod for the shock absorber manufacturing process according to the present invention configured as described above is as follows.                     

As shown again in FIG. 2, the shock absorber 1 of the assembling process is first seated on each pallet 100 so as to be positioned at the base 200 of the tensioning system of the piston rod 30 along the kenvey 110. do.

The shock absorber 1 on the pallet 100 stopped at the position of the base 200 includes the shock absorber 1 having the clamping block 306 moved forward and backward by the operation of the air cylinder 304 in the clamping device 300. ) To be centered and fixed. At this time, clamping is surely performed by the “V” groove 308 of the clamping block 306.

Furthermore, the forward and backward movement of the clamping block 306 can be made smoothly by the LM guide 312 of the lower plate 310.

As such, the piston rod 30 must be tensioned to the longest with the chucking device 400 in order to perform the coking or welding process in the state where the shock absorber 1 is fixed.

Therefore, the servomotor 406 for chucking the rolling part 31 of the piston rod 30 is operated. The ball screw shaft 408, which is shafted by the operation of the servomotor 406, rotates, and the vertical bracket 411 connected to the nut housing 410 and the nut housing 410 by the rotation of the ball screw shaft 408, and horizontal The bracket 412 and the chucking member 418 are moved downward. In this case, the servo motor 406 is programmed with a region in which the servo setting section for each product is determined in advance, and when the chucking member 418 descends along the ball screw shaft 408, it is sensed by the proximity sensor 424. This is done. If it is sensed outside the servo area, it is regarded as another product and it is judged as a facility error without performing the next operation. This is to prevent collisions and to protect the equipment, and it is possible to accommodate various lengths or insertion positions by the servo system for each vehicle type.

When the sensing is performed as described above, the servomotor 406 stops driving, and the jaws 420 chuck the precursor 31 of the piston rod 30 by the reverse of the cylinder 422.

Then, the servomotor 406 drives the reverse rotation in the chucking state of the rolling section 31, so that the chucking member 418 is moved upward. The upward movement is made up to a value previously input to the servomotor 406, that is, the longest distance of the piston rod 30 for each product.

In addition, the vertical movement of the lifting bracket 411 is made more and more stable by the rail block 414 and the LM rail 416, each of the posts 426 equipped with a spring 427 of the piston rod 30 When the raised dimension or the chucking position of the piston rod 30 is slightly changed, the shock to be received by the servomotor 406 is buffered.

On the other hand, the oil seal 40 which is in close contact with the piston rod 30 may be raised in the process of the piston rod 30 is chucked and raised. Therefore, the oil seal pressing device 500 to prevent this is used at the same time as the chucking device 400.

By operating the cylinder 518 of the oil seal pressing device 500, the push bar 522 is moved forward along the guide rail 520 so that the jig 524 having one side open is wrapped around the outer circumferential surface of the piston rod 30 that has already been raised. do.

In this state, the nut housing 510 of the ball screw shaft 508 is moved downward by the driving of the servomotor 506, and the movement plate 512, the cylinder 518, and the jig are moved by the movement of the nut housing 510. 524 is also moved downward.

The moving plate 512 is moved up and down while being guided by the rail block 514 and the LM rail 516.

The jig 524 of the push bar 522 is lowered along the piston rod 30 so as to press the upper surface of the oil seal 40 in the outer tube 10 so as not to escape as the piston rod 30 rises.

Although the lifting of the piston rod 30 is completed, although not shown, the process is performed by using a separate equipment such as caulking or welding.

Release of the chucked piston rod 30 raises the movable plate 512 and the cylinder 518 by reverse rotation driving of the servomotor 506 of the oil seal pressing device 500 so that the jig 524 moves to the outer tube ( 10).

In the reverse operation of the cylinder 518, the push bar 522 is returned to the standby position for the next product.

Then, the piston rod 30 is lowered to the correct position by the forward rotation driving of the servomotor 406 of the chucking device 400, the jaws 420 are opened by the cylinder 422 forward movement, and the piston rod 30 Chucking is released.

In addition, the clamping device 300, which was fixing the shock absorber 1, is also released from the clamping block 306 by the operation of the air cylinder 304, and the next pallet 100 is positioned by the movement of the conveyor 110. The same operation is repeated.

As described above, all processes are automatically performed to remove the piston rod 30 to its longest length, compared to the operator who manually pulls the piston rod 30 to the longest state, thereby eliminating defects, and improving productivity. do.                     

Although the present invention has been illustrated and described with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the present invention set forth in the claims below. Various modifications may be made without departing from the spirit of the invention.

As described above, the tensioning system of the piston rod for the shock absorber manufacturing process of the present invention allows the piston rod to be caulked or welded in the state where the piston rod is pulled out the longest by the automated system during the manufacturing process of the shock absorber, thereby improving productivity and quality. It works.

Claims (11)

In the tensioning system of piston rod for shock absorber manufacturing process, A base on which the shock absorber, in which the oil and the piston rod assembly are assembled, is mounted on the pallet, A frame installed vertically on the base; A clamping device installed on both sides of the frame and configured to center and fix the shock absorber; Is installed in the frame, the chucking device for moving up and down by chucking the precursor of the piston rod, An oil seal pressing device installed on the frame and pressurizing an upper surface of the oil seal so that the oil seal in close contact with the piston rod does not come up when the piston rod is tensioned; Including, Here, the oil seal pressing device, A plate installed as a fixed block on the frame; A servo motor installed on the plate, A ball screw shaft connected to the servo motor by a shaft joint; A nut housing installed on the ball screw shaft; A moving plate connected to the nut housing to move up and down; A cylinder installed on the moving plate, A push bar installed at one end of the cylinder and moving forward and backward along a guide rail by operation of the cylinder; With a jig installed at one end of the push bar, Tensile system of the piston rod for shock absorber manufacturing process, characterized in that configured. The method of claim 1, The clamping device, A bracket installed on the frame; An air cylinder fixed to the bracket; A clamping block installed at one end of the air cylinder to fix an upper end of the outer tube; Tensile system of the piston rod for shock absorber manufacturing process, characterized in that configured. The method of claim 2, A lower plate connected to the bottom surface of the bracket, The LM guide is installed on the upper surface of the lower plate to guide the forward and backward movement of the clamping block, Tensile system of the piston rod for shock absorber manufacturing process characterized in that it further comprises. The method of claim 2, A tensioning system of the piston rod for the shock absorber manufacturing process, characterized in that the "V" groove is formed at the end of the clamping block. The method of claim 1, The chucking device, A plate installed as a fixed block on the frame; A servo motor installed on an upper portion of the plate, A ball screw shaft connected to the servo motor by a shaft joint; A nut housing installed on the ball screw shaft; Vertical and horizontal brackets installed on the front of the nut housing, A chucking member connected to the horizontal bracket and moved up and down; A jaw rotatably installed at the lower end of the chucking member to chuck the rolling section of the piston rod by cylinder driving, Tensile system of the piston rod for shock absorber manufacturing process, characterized in that configured. The method of claim 5, wherein Rail blocks are installed in the orthogonal direction to the plate of the chucking device, The tension system of the piston rod for shock absorber manufacturing process, characterized in that the LM rail for guiding the lifting and lowering movement along the rail block is further installed on the vertical bracket. The method of claim 5, wherein A piston for the shock absorber manufacturing process, further comprising a proximity sensor installed at the center of the chucking member, the proximity sensor determining whether the product is set in the servo region by contacting the rolling member when the chucking member descends. Tension system of rod. The method of claim 5, wherein The shock absorber is installed on the chucking member is provided with a plurality of posts are spring-mounted on the horizontal bracket in order to prevent the overload occurs in the servo motor of the chucking device by changing the rising position for each product of the piston rod Tension system of piston rod for manufacturing process. delete The method of claim 1, Tensile system of the piston rod for the shock absorber manufacturing process, characterized in that the one end is formed in an open cylindrical shape on one end of the jig. The method according to claim 1 or 5, The servomotor of the oil seal pressing device or the chucking device is a tension system of the piston rod for the shock absorber manufacturing process, characterized in that the servo section for each product is set in consideration of the full length of each shock absorber.

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