KR100411789B1 - Disk chuck - Google Patents

Abstract

The present invention relates to a disk chuck, and more particularly, to allow a plurality of disks to be bound at the same time in a state in which they are coincident with each other, or to unbind them simultaneously.

Disc chuck according to the present invention for operating the hollow main shaft in which a plurality of disks are laminated on the outer surface, the piston installed in the main shaft to be elevated by the pressure of the fluid, the operation is installed vertically long in the center of the main shaft to be combined with the piston A plurality of pressing members coupled to the working rod to move up and down together with the rod, and having an inclined surface formed on the outer surface thereof, and a radius passing through the main shaft to press and fix the inner diameter of the disk while being pushed by the inclined surface when the pressing member is operated. It includes a plurality of binding members to advance in the direction.

Description

Disk Chuck {DISK CHUCK}

The present invention relates to a disk chuck, and more particularly, to a disk chuck capable of simultaneously binding or releasing a plurality of disks.

In general, formatting of a magnetic disk for a hard disk drive (hereinafter referred to as a "disk"), which is used as a storage device of a computer, is because a data cannot be written on its surface when the film is completed. To make the data recordable. In other words, it creates a track on the disk closely and divides the sector into a state capable of storing data.

In order to increase the productivity of the hard disk drive by performing such a format operation more quickly, a production line which manufactures a hard disk drive is performing a disk formatting operation in the pre-assembly process of the hard disk drive. It uses a disk chuck to hold multiple disks together so that they can be formatted simultaneously.

Japanese Patent Laid-Open No. 2000-11569 discloses a disc chuck for use in such a disc format process. It has a mandrel 3 coupled to the receiver plate 2 of the spindle motor 1, as shown in FIG. 1, and the hollow of the mandrel 3 so that a number of disks 4 can be fitted and stacked. It is coupled to the part and has a pin (5) extending a predetermined length to the top. The disk chuck also has a plurality of spacers 6 which allow the disks 4 coupled to the pins 5 to be spaced apart from each other, and the pins can be fixed so that the plurality of disks 4 stacked on the pins 5 can be fixed. The fastener 8 is coupled to the upper end of the fixing bolt 7 through the fastening (7).

When the disk 4 is fixed through the disk chuck, the disks 4 and the spacers 6 are alternately stacked on the pins 5 on the mandrel 3, and finally, the fasteners 8 are fastened. Secure (4) together. When the plurality of fixed disks 4 are formatted, the formatting process is performed while rotating the spindle motor 1 so that the plurality of disks 4 rotate together. After the formatting process is completed, the operator unscrews the fastening bolt 7 on the upper pin 5 again to release the fastener 8 and then separates the disk 4 and the spacer 6 stacked on the pin 5. A new disk requiring a format is mounted in the same manner as described above.

However, in the conventional disc chuck of this configuration, when fastening or detaching the disc 4 to the disc chuck for formatting the disc 4, the operator directly tightens or loosens the fastening screw 7 to engage or separate the fastener 8. Fixing and replacing the disk 4 has been cumbersome and complicated because it has to perform the job.

In addition, in the conventional disk chuck, when the outer surface of the pin 5 is worn out by frequent fixing and detaching operations of the disk 4, the center of the disk 4 may be coupled in a state where the center of the disk 4 does not coincide exactly. There was a problem that could cause a bad format.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and an object of the present invention is to provide a disk chuck that can easily fix or detach a plurality of disks.

Another object of the present invention is to provide a disk chuck which allows the center to be fixed in a precisely matched state when the disk is fixed.

1 is a cross-sectional view showing a configuration of a conventional disk chuck, showing a state in which a disk is separated.

Figure 2 is a cross-sectional view showing the configuration of the disk chuck according to the present invention, showing a state in which the disk is bound.

3 is a perspective view showing the configuration of a disk chuck according to the present invention.

Figure 4 is a cross-sectional view showing the configuration of the disk chuck according to the present invention, showing a state in which the binding of the disk is released.

5 is a cross-sectional view of a disk chuck in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10: principal axis, 11: the great neck,

12: small neck, 13: cylinder,

20: piston, 22: piston spring,

30: working rod, 40: pressing member,

43: inclined surface, 45: pressure spring,

46: spring support plate, 47: retaining ring,

50: binding member, 53: binding member restoring spring,

60: spacer.

Disc chuck according to the present invention for achieving the above object is a hollow main shaft in which a plurality of disks are stacked on the outer surface, a piston installed so as to be liftable in the main shaft, the upper and lower in the center of the main shaft to be combined with the piston An inner diameter portion of the disk, the working rod having a long length, and a plurality of pressing members coupled to the working rod to move up and down together with the working rod and having an inclined surface formed on the outer surface thereof, and being pushed by the inclined surface when the pressing member is operated. It characterized in that it comprises a plurality of binding members for advancing in the radial direction through the main shaft to press fixed.

In addition, the main shaft is formed inside the cylinder portion for receiving the piston to be able to lift and lower, the large diameter portion having a relatively large outer diameter, the outer diameter is formed smaller than the large diameter portion so that the disk is fitted and the pressure member is raised and lowered It characterized in that it comprises a small diameter portion formed with a hollow portion that possibly accommodates.

In addition, a piston spring for pressing the piston in one direction is installed in the cylinder part, and the piston spring is stretched and retracted by the pressure of the fluid applied to the cylinder part.

In addition, the present invention is supported by the plurality of pressing members are spaced apart from each other and the pressing member coupling means installed between the operating rod and the pressing member to be elevated in a state having a predetermined elasticity when the operating rod is elevated It characterized in that it further comprises.

The pressure member coupling means may include a plurality of pressure springs received and installed at a predetermined depth in the upper portion of the pressing member, a spring support plate supporting the upper portion of the pressure spring, and a spring support plate to catch the spring support plate. It characterized in that it comprises a fixing ring fastened to the fixing groove.

In addition, the inclined surface is disposed in a plurality of places on the outer surface of the pressing member radially, the main shaft corresponding to the position of the inclined surface is characterized in that a plurality of through holes in the radial direction so that the binding member can be installed retractably It is done.

In another aspect, the present invention is characterized in that it further comprises a ring-type binding member restoring spring is installed along the outer circumference of the main shaft to press the binding member toward the center of the main shaft to release the binding of the disk.

In addition, the outer surface of the main shaft and the end of the binding member is characterized in that the spring receiving groove for receiving the binding member restoring spring is formed so that the binding member restoring spring does not protrude on the outer surface.

In addition, the plurality of disks are characterized in that it further comprises at least one spacer member interposed between each disk of the outer surface of the main shaft so that the plurality of disks are stacked in a spaced apart state and the inner surface is pressurized by the binding member.

In addition, the binding member is provided in a cylindrical shape, characterized in that the end in contact with the inclined surface of the pressing member is made of a corresponding inclined surface.

Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in detail.

As shown in FIG. 2, the disk chuck according to the present invention has a hollow main shaft 10 mounted on a rotating shaft 210 of a conventional spindle motor 200 so that a plurality of disks 100 can be stacked on an outer surface thereof. And a piston 20, a working rod 30, a plurality of pressing members 40, and a plurality of binding members, which are mounted on the main shaft to bind the plurality of disks 100 mounted on the outside of the main shaft 10. 50 is provided. In addition, the disk chuck includes a plurality of spacers 60 to allow each disk 100 on the outer surface of the main shaft 10 to be fixed in a spaced state.

The main shaft 10 is coupled to the rotary shaft 210 of the spindle motor 200 to the lower side of the large diameter portion 11 and the large diameter portion 11 of which the outer diameter is relatively large so as to achieve stable rotation. It is provided with a small diameter portion 12 is provided integrally and the outer diameter is smaller than the large diameter portion 11 so that a plurality of disks 100 can be coupled to the outer surface. In the large diameter portion 11 of the main shaft 10, the cylinder portion 13 is formed to accommodate the piston 20 which is installed to be elevated in the vertical direction. A lower cover member 14 for closing the opening of the cylinder part 13 is coupled to the lower end of the large diameter part 11, and an upper cover member 15 for closing the upper opening is coupled to the upper end of the small diameter part 12. do. The lower cover member 14 and the upper cover member 15 are coupled through the fastening of the fixing screw 16, respectively.

In addition, a ring-shaped sealing member 21 is provided on the outer surface of the piston 20 which is lifted and lowered in the cylinder portion 13 to maintain the airtightness with the inner surface of the cylinder portion 13, and the piston 20 is usually provided on the upper portion of the piston 20. A plurality of piston springs 22 are installed so that 20 has a force to descend. At this time, a plurality of piston springs recessed upwards from the cylinder portion 13 to accommodate the upper portion of the piston spring 22 in the support portion 17 formed in the main shaft 10 to support the operation rod 30 to be elevated. Coupling groove 18 is formed.

In addition, one side of the large diameter portion 11 of the main shaft 10 is for supplying compressed air into the interior of the cylinder portion 13, the outlet is formed with an air passage (19) in communication with the lower space of the piston (20). This configuration is such that when the air supplied from the normal compressed air supply means 300 flows into the lower space of the piston 20, the upward movement of the piston 20 is made, and the air pressure in the cylinder portion 13 is released. The piston 20 is to be lowered to the lower position by the elasticity of the piston spring 22. Here, the present embodiment adopts a method of supplying compressed air into the cylinder part 13 for the lifting operation of the piston 20, but employs a conventional hydraulic pump for supplying oil instead of the compressed air supply means 300. Lifting operation of the piston 20 may be made.

2 and 3, the operation rod 30 is installed vertically long in the center of the hollow portion 12a formed in the small diameter portion 12 of the main shaft 10, the operation of the piston 20 The lower end is coupled via the piston 20 and the fixed bolt 23 installed in the cylinder portion 20 to be elevated by. At this time, the operating rod 30 is installed to penetrate through the center of the support portion 17 for partitioning the lower cylinder portion 20 and the upper small diameter portion 12 inner space, and is supported by the support portion 17 to be elevated.

The plurality of pressing members 40 are coupled to the outer surface of the operation rod 30 to move up and down together with the operation rod 30, and are provided in a round disc shape having a predetermined thickness and have a hollow portion 12a of the main shaft 10. ) Stacked in a spaced apart state. The pressing member 40 is formed with a coupling hole 41 through which the operating rod 30 penetrates in the center to be coupled to the operating rod 30. In addition, the pressing member 40 is formed to have a size corresponding to the inner diameter of the hollow portion 12a of the main shaft 10 so that the outer circumferential surface of the pressing member 40 in contact with the inner surface of the hollow portion 12a of the main shaft 10. In addition, the outer circumferential surface of the pressing member 40 is in contact with the end of the binding member 50 in order to allow the disk binding member 50 to be described later to advance and retreat in the radial direction of the main shaft 10 when the pressing member 40 is elevated. A plurality of inclined surfaces 43 are formed. The inclined surface 43 is formed through the inclined groove 42 recessed a predetermined depth from the outer peripheral surface of the pressing member 40, the inclined groove 42 is formed with a shallow depth of the upper side and a deep depth of the lower side binding member An inner surface in contact with the end of 50 forms an inclined surface 43. In addition, the inclined grooves 42 are formed at a plurality of places on the outer circumferential surface of the pressing member 40 to be equally spaced from each other and are disposed radially.

In addition, the present invention allows a plurality of pressing members 40 are stacked and supported in a state spaced apart from each other on the outer surface of the operating rod 30, and at the same time, when the operating rod 30 is elevated, the pressing member 40 is It is provided with a pressing member coupling means installed between the operating rod 30 and each pressing member 40 to move up and down with a predetermined elasticity.

The pressure member coupling means may be supported by a plurality of pressure springs 45 for pressing the upper portion of the pressure member 40, a spring support plate 46 covering the upper end of the pressure spring 45, and a spring support plate 46. It includes a fixing ring 47 coupled to the outer surface of the operating rod (30). At this time, the plurality of pressure springs 45 are arranged to be equal to each other on the upper portion of the pressing member 40, the spring receiving groove of a predetermined depth in the upper portion of the pressing member 40 to accommodate the pressing spring (45). 44 is formed. In addition, the upper portion of the pressing member 40 is recessed to a predetermined depth so that the spring supporting plate 46 supporting the upper end of each pressing spring 45 can be accommodated. And the fixing ring 47 is fastened to the fixing groove 31 formed on the outer surface of the operating rod 30 so that the upper surface of the spring support plate 46 is caught and supported.

The configuration of the pressing member coupling means is to have a force to move the pressing member 40 to the lower portion of the predetermined section separately from the operating rod 30 by the elasticity of the pressure spring 45, this force is the binding member 50 By applying to the plurality of disks 100 and the spacer 60 is coupled to the outer surface of the main shaft 10 through) will be to achieve a stable binding of the disk (100). More details will be described later along with the overall operation description.

As shown in FIGS. 3 and 5, the plurality of binding members 50 are formed in a cylindrical shape, and end portions of the plurality of binding members 50 that contact the inclined surfaces 43 of the pressing members 40 correspond to the inclined surfaces 51. In addition, a plurality of through-holes 52 are formed in the main shaft 10 in the radial direction such that the binding member 50 can be installed in the radial direction of the main shaft 10. In this case, a plurality of through holes 52 are radially disposed to correspond to the position of the inclined surface 43 of the pressing member 40 installed in the small diameter portion 12 of the main shaft 10, and the retraction of the binding member 50 is guided. Its inner diameter is formed to a size corresponding to the outer diameter of the binding member (50).

In addition, restoring the ring-shaped binding member along the outer circumference of the main shaft 10 to press the binding member 50 toward the center of the main shaft 10 to release the binding of the disk 100 on the outer surface of the main shaft 10. A spring 53 is installed. In addition, the binding member restoring spring 53 protrudes from the outer surface of the main shaft 10 and the end outer surface of the binding member 50 at the outer surface of the main shaft 10 and the end of the binding member 50 in contact with the binding member restoring spring 53. Spring receiving grooves (54, 55) are formed so as not to. This configuration is because the binding member restoring spring 53 is accommodated in the spring receiving groove (54, 55) does not protrude to the outer surface of the main shaft 10, the disk 100 and the spacer member coupled to the outer surface of the main shaft 10 ( 60) and the binding member restoring spring (53) is to avoid contact.

The spacer 60 interposed between each disk 100 corresponds to the outer diameter of the small diameter portion 12 at the center so that the spacer member 60 may be fitted to the outer surface of the small diameter portion 12 of the main shaft 10, as shown in FIG. 4. It is provided in the usual ring shape in which the engaging hole 61 is formed. In addition, the spacer 60 has a predetermined height h1 such that a plurality of disks 100 stacked on the outer surface of the main shaft 10 can be coupled to the position of the binding member 50. When determining the height h1 of the spacer 60, it is preferable to set the height 100 so that the disk 100 stacked on the outer surface of the main shaft 10 is not stacked at the position of the binding member restoring spring 53.

In addition, in the present invention, the upper support member 70, which is similar in shape to the spacer 60, is stacked on the uppermost disk 100 stacked on the outer surface of the main shaft 10. The upper support member 70 is the uppermost. The height h2 is formed to be larger than the height h1 of the spacer 60 to stably fix the disk 100 stacked thereon.

The following describes the fixing and detaching operation of the disk using the disk chuck according to the present invention having such a configuration.

As shown in FIG. 4, when the spindle motor 200 remains stationary and compressed air flows into the cylinder part 13 of the main shaft 10, the piston 20 in the cylinder part 13 moves to the piston spring. (22) to win the rise of elasticity. In addition, the operation rod 30 which cooperates with the piston 20 is raised, and the plurality of pressure members 40 coupled to the outer surface of the operation rod 30 are also raised. In addition, the binding member 50 in contact with the inclined surface 43 of the pressing member 40 is moved to the center direction of the main shaft 10 by the elasticity of the binding member restoring spring 53, so that the binding member 50 is the main shaft ( It does not protrude on the outer surface of 10). Therefore, in this case, the operator may stack the spacer 60 and the disk 100 on the outer surface of the main shaft 10 to fix the disk 100.

When stacking the disk 100, the disk 100 is first stacked first, and then the spacer 60 and the disk 100 are alternately stacked. And the upper support member 70 is laminated on the uppermost disk 100.

When fixing each disk 100 after the stacking of the disk 100 is completed, as shown in FIG. 2, when the air pressure supplied into the cylinder portion 13 of the main shaft 10 is released, the piston 20 may be a piston. It descends by the elasticity of the spring 22, and also the actuating rod 30 and the press member 40 with the piston 20 also fall. At this time, the force transmitted to the pressing member 40 is transmitted to the pressure spring 45 through the fixing ring 47 and the spring support plate 46 coupled to the operation rod 30, and again pressurized through the pressure spring 46 Delivered to member 40. When the pressing member 40 is lowered by this operation, the inclined surface 43 formed on the outer circumferential surface of the pressing member 40 is also lowered, so that the plurality of binding members 50 are pushed in the radial direction of the main shaft 10 while the main shaft is pushed down. It protrudes toward the inner circumferential surface of the disk 100 and the spacer 60 stacked on the outer surface of the (10). Therefore, the plurality of disks 100 and the spacer 60 stacked on the outer surface of the main shaft 10 are fixed while the inner circumferential surface is pressed by the binding member 50. In addition, at this time, since the elasticity of the pressure spring 45 acts on the pressure member 40, the pressure member 40 maintains a force to be lowered, and this force is spaced apart from the disk 100 through the binding member 50. Since it is transmitted to the inner circumferential surface of the member 60, more stable fixing of the disk 100 and the spacer 60 is possible. In addition, since the plurality of binding members 50 radially disposed at the same time as the pressing member 40 is lowered to protrude radially at the same time to bind the disk 100 and the spacer 60, spaced apart from each disk 100 The center of the member 60 is fixed in an exact coincidence state. In this state, the operator may drive the spindle motor 200 to perform the formatting process of each disk 100 while allowing the disk 100 to rotate.

When the disk 100 is to be removed again after the formatting process of the disk 100, the operating rod 30 which supplies the compressed air back into the cylinder portion 13 of the main shaft 10 and cooperates with the piston 20. And when the pressure member 40 is raised, because the plurality of the binding member 50 is moved in the direction of the center of the main shaft 10 by the elasticity of the binding member restoring spring 53, the plurality of disks 100 and The binding of the spacer 60 is released. In this state, the operator can easily separate each of the disk 100 and the spacer 60, the format is completed from the main shaft 10, the small diameter portion 12, it is possible to easily stack a new disk that needs to be formatted again.

As described in detail above, the disk chuck according to the present invention has a plurality of binding members stacked on the outer surface of the main shaft while the plurality of binding members are advanced in the radial direction of the main shaft by the inclined surface of the pressing member when the plurality of pressing members are elevated together with the operation rod. By binding or releasing the disc and the spacer of the disc at the same time, the operator can easily perform the fixing and detachment of the disc in a short time.

In addition, in the present invention, since the plurality of binding members radially disposed when the pressing member is raised and lowered to bind or release the disk while retreating in the radial direction of the main shaft, not only the fixing of each disk but also the center of each disk is precisely performed. This has the effect of being fixed in a consistent state

Claims (10)

A hollow main shaft in which a plurality of disks are stacked on an outer surface thereof, a piston installed in the main shaft so as to elevate, an actuating rod installed vertically in the center of the main shaft so as to move up and down in combination with the piston; A plurality of pressing members coupled to the working rod and having an inclined surface formed on the outer surface thereof, and radially retreating through the main shaft to press and fix the inner diameter portion of the disk while being pushed by the inclined surface when the pressing member is operated. A disk chuck comprising a plurality of binding members. The method of claim 1, The main shaft has a cylinder portion for receiving the piston in a liftable manner therein, a large diameter portion having a relatively large outer diameter, and an outer diameter smaller than the large diameter portion so as to fit the disk, and the pressure member can be lifted. A disk chuck comprising a small neck portion formed with a hollow portion for receiving. The method of claim 2, The piston chuck is installed in the cylinder portion is a piston spring for pressing the piston in one direction, the piston spring is expanded and retracted by the pressure of the fluid applied to the cylinder portion, characterized in that the piston chuck. The method of claim 1, It further comprises a pressing member coupling means which is supported between the pressing member is spaced apart from each other and is installed between the operating rod and the pressing member so that the lifting rod can be lifted in a state having a predetermined elasticity when the operating rod is elevated. Disc chuck, characterized in that The method of claim 4, wherein The pressing member coupling means includes a plurality of pressure springs received and installed at a predetermined depth in the upper portion of the pressing member, a spring supporting plate supporting the upper portion of the pressing spring, and fixing the outer surface of the operating rod to catch the spring supporting plate. Disc chuck comprising a fixing ring fastened to the groove. The method of claim 1, The inclined surface is arranged to be radial in a plurality of places on the outer surface of the pressing member, characterized in that a plurality of through-holes in the radial direction is formed in the main shaft corresponding to the position of the inclined surface so that the binding member can be installed retractable Pretending to be a disc. The method of claim 1, And a ring-shaped binding member restoring spring installed along an outer circumference of the main shaft to press the binding member toward the center of the main shaft to release the binding of the disk. The method of claim 7, wherein And a spring receiving groove formed at an outer surface of the main shaft and an end of the binding member to accommodate the binding member restoring spring so that the binding member restoring spring does not protrude on its outer surface. The method of claim 1, And at least one spacer member interposed between the respective disks of the outer surface of the main shaft so that the plurality of disks are stacked in a spaced apart state from each other, and the inner surface of the plurality of disks is press-fixed by the binding member. The method of claim 1, The binding member is provided in a cylindrical shape, the end of the disk contact chuck, characterized in that the end made in contact with the inclined surface.