KR101983944B1 - Chucking device of spindle for machining accuracy measurement - Google Patents

Abstract

The present invention provides a chucking device of a spindle for machining accuracy measurement which improves a stationary and rotary structure. The chucking device of a spindle for machining accuracy measurement comprises: a rotary assembly which has a rotary shaft, and is rotatably arranged; a chucking unit which is arranged on one end of the rotary shaft, fixes an inner circumferential surface of a target to rotate with the rotary shaft, and allows an outer diameter thereof to be adjusted by an axial movement of the rotary shaft; and a cylinder assembly arranged on the other end of the rotary shaft. The cylinder assembly includes: a cylinder device which has a moving shaft axially separated from the rotary shaft, and axially moves the moving shaft; and a bearing device which is fixed on the moving shaft to move in the axial direction, axially moves the rotary shaft with the moving shaft, and prevents rotation of the rotary shaft from being transferred to the moving shaft.

Description

[0001] The present invention relates to a chucking device for spindle for machining accuracy measurement,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chucking device for a spindle for measuring a machining accuracy, and more particularly, to a chucking device for a spindle for measuring machining accuracy, which improves the rotation structure.

Circular parts are used for various machines. These circular parts must be precisely manufactured within the tolerance range for the connection with other parts and for smooth and organic operation.

Among the circular parts, the circular parts having the inner diameter or the outer diameter measure the inner diameter or the outer diameter in the manufacturing process to check for the defect or improve the error.

As a typical method for measuring the inner and outer diameters of the circular part, there is a measuring method using a spindle device. The circular part is fixed and rotated on the spindle device, and the specification of the circular part is measured using a separate measuring device.

However, there is a difference in the internal and external diameters of the circular parts, and it is problematic to place various bearing devices for this purpose.

An aspect of the present invention provides a chucking apparatus for a spindle for measuring a machining accuracy, which improves a fixing and rotating structure.

According to an aspect of the present invention, there is provided a chucking apparatus for a spindle for measuring machining accuracy, comprising: a rotary assembly having a rotary shaft and rotatably installed; A chucking unit disposed at one end of the rotating shaft and rotating together with the rotating shaft by fixing an inner circumferential surface of the object, the chucking unit having an outer diameter adjusted by axial movement of the rotating shaft; And a cylinder assembly disposed at the other end of the rotating shaft, wherein the cylinder assembly has a moving shaft spaced apart from the rotating shaft in the axial direction, and configured to move the moving shaft in the axial direction; A bearing device fixed to the moving shaft and axially moving, the bearing device configured to axially move the rotating shaft together with the moving shaft, wherein rotation of the rotating shaft is not transmitted to the moving shaft.

The rotation shaft may be configured such that a rotation operation about the axis and a movement operation in the axial direction are mutually independent.

The rotation assembly includes a rotation boss having a hollow portion into which the rotation shaft is slidably inserted, the rotation boss being configured to rotate with the rotation shaft by receiving a rotational force from the driving source And a rotary boss.

Wherein the rotating shaft includes a moving bracket formed to have a larger turning radius than an adjacent portion, the bearing device comprising: a device housing fixed to the moving shaft and having the moving bracket positioned therein; And a pair of support members for restricting axial movement of the movable bracket within the apparatus housing.

The pair of support members may include first and second support members that are fixed to the inside of the apparatus housing and are respectively disposed at one axial side and the other side of the movable bracket.

Wherein the first and second support members and the moving bracket are formed in the shape of a disk and the bearing device is rotatably supported by the first and second support members and the first and second support members so that the rotation of the rotation shaft is not transmitted to the bearing device and the cylinder device. And first and second bearing members disposed between the movable brackets, respectively.

The chucking unit includes: a pressurizing flange fixed to the rotary shaft; And a chuck having an outer diameter varying to fix the object, the chuck being configured such that an inner surface thereof is pressed by the pressurizing flange to expand an outer surface thereof.

According to an aspect of the present invention, the object can be fixed and rotated by varying the chucking unit even when the kind of the measurement object is different.

1 and 2 are perspective views of a measuring apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of a measurement device according to an embodiment of the present invention.
Figures 4 and 5 illustrate the operation of a chucking unit of a chucking device according to an embodiment of the present invention.
6 is an enlarged view of a chucking unit according to an embodiment of the present invention.
Figures 7 and 8 are views of the operation of a cylinder assembly of a chucking device in accordance with an embodiment of the present invention.
Figures 9 and 10 are diagrams of operation of a chucking device in accordance with an embodiment of the present invention.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, as claimed, and it is to be understood that the invention is not limited to the disclosed embodiments.

In addition, the same reference numerals or signs shown in the respective figures of the present specification indicate components or components performing substantially the same function.

Also, the terms used herein are used to illustrate the embodiments and are not intended to limit and / or limit the disclosed invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more features, integers, steps, operations, elements, components, or combinations thereof.

It is also to be understood that terms including ordinals such as " first ", " second ", and the like used herein may be used to describe various elements, but the elements are not limited by the terms, It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term " and / or " includes any combination of a plurality of related listed items or any of a plurality of related listed items.

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

FIG. 1 is a perspective view of a measuring apparatus according to an embodiment of the present invention, and FIG. 3 is a sectional view of a measuring apparatus according to an embodiment of the present invention.

The measuring apparatus 1 may include a cradle 10 and a chucking device 20 for a spindle for measuring a machining accuracy. The holder 10 is configured to support the chucking device 20 of the spindle for machining precision measurement.

The chucking device 20 can fix an object formed in the shape of a circle or a rotating body, and rotate the object to measure the specification of the object. Since the objects have different sizes, outer diameters, and inner diameters, the chucking device 20 is required to have a configuration capable of fixing various objects.

The chucking device 20 may include a rotating assembly 30 and a chucking unit 60.

The rotary assembly 30 may be rotatably provided by an external force. The rotary assembly 30 includes a rotary boss 32 formed with a hollow portion 31 and a rotary shaft 40 inserted into the hollow portion 31 and configured to be slidable in the axial direction on the rotary boss 32 . The rotary shaft 40 and the rotary boss 32 can rotate together. That is, the rotary boss 32 and the rotary shaft 40 can rotate together, but the rotary boss 32 does not move when the rotary shaft 40 moves in the axial direction. The outer surface of the rotary boss 32 is provided with a bearing member 36 to be described later so that the rotary boss 32 can be rotated with respect to the table 10.

The chucking device 20 may include a driving source 70 that generates a rotational force. The driving source 70 may include a rotary belt 72 connected to the rotary boss 32. [ A power shaft 71 of the driving source 70 is rotatably connected to one side of the rotary belt 72 and a rotary shaft 72 is rotatably connected to the other side of the rotary boss 32, (32). The driving source 70 may include a driving motor and a speed reducer.

The rotary boss 32 may include a power transmitting member 34 on which the rotary belt 72 is wound. The power transmitting member 34 may be formed in a concavo-convex structure to prevent the rotation of the rotating belt 72 from occurring due to rotation. The rotational force from the driving source 70 is transmitted to the rotating boss 32 and the rotating shaft 40 via the power transmitting member 34 so that the object fixed to the chucking unit 60 can be rotated. At this time, the specification of the object can be measured through various inspection sensors provided around the object to be rotated.

FIGS. 4 and 5 are views showing an operation of a chucking unit of a chucking apparatus according to an embodiment of the present invention, and FIG. 6 is an enlarged view of a chucking unit according to an embodiment of the present invention.

The rotary assembly 30 may include a rotary table 50.

The rotary table 50 may have a cylindrical shape and may have a concave insertion space 54 formed therein. The rotary table 50 includes a first table body 51 on which the chuck and the adjusting member 66 are disposed, a second table body 52 spaced apart from the first table body 51 by a predetermined distance in the radial direction, And a third table body 53 connected to the first and second table bodies 51 and 52 and configured to rotate the first and second table bodies 51 and 52 together.

A concave groove 51a is formed in the upper part of the first table body 51 so that at least a part of the adjusting member 66 described later can be arranged.

The first and second table bodies 51 and 52 are spaced apart from each other by a predetermined distance to form an insertion space 54. [ The insertion space 54 is configured so that a part of the object O can be inserted when the object is fixed to the chucking unit 60.

The chucking unit 60 is provided to fix the object at one end of the rotating shaft 40. The chucking unit 60 is provided to fix the inner circumferential surface P of the object O and can be configured to have different outer diameters depending on the inner diameter of the object.

The chucking unit 60 may include a chuck 62 and an adjusting member 66 that changes the size of the outer diameter of the chuck 62. [ The chuck 62 is configured to press the inner peripheral surface P of the hole formed in the object O with its outer surface and to fix the object. The chuck 62 is formed with a slit groove 63 (refer to Figs. 1 and 4-6) along its periphery so that the slit groove 63 is opened by the pressing of the adjusting member 66 as shown in Figs. So that the outer diameter of the chuck can be increased. The chuck to which the regulating member 66 is guided is configured to have a hollow portion, and the inner surface of the chuck may be formed to be inclined to be conical.

A guide sloping surface 64 for guiding the inner diameter formed at the center of the object in a straight line is formed on the upper outer periphery of the chuck.

The adjustment member 66 is disposed at the upper end of the rotary shaft 40 so that the inner surface of the chuck 62 is extended outwardly during the lowering operation of the rotary shaft 40 so that the chuck fixes the central inner diameter of the object . The adjusting member 66 includes an adjusting member body 67 which is movably disposed in the concave space of the first table body 51 and a pressing flange 63 which protrudes radially from the adjusting member body 67 to press the inner surface of the chuck 68).

The chucking device 20 may include a bearing member 36. The bearing member 36 may be disposed between the mount 10 and the rotary assembly 30 so that the operation of the rotary assembly 30 of the chucking device 20 is not interfered by the mount 10. The mount 10 may include a mounting boss 12. The mounting boss 12 may have a hollow portion formed therein, and the upper surface thereof may be configured to face the lower surface of the rotary table 50. The upper surface of the stationary boss 12 and the lower surface of the rotary table 50 may be spaced apart from each other by a predetermined distance. The present embodiment is configured such that the rotation of the rotary table 50 is not interfered with the stationary boss 12 by being spaced apart from the stationary boss 12 by a predetermined distance between the stationary boss 12 and the rotary table 50. However, For example, a separate bearing may be provided between the lower surface of the rotary table 50 and the upper surface of the stationary boss 12.

FIGS. 7 and 8 are views illustrating operation of a cylinder assembly of a chucking apparatus according to an embodiment of the present invention.

The chucking device 20 may include a cylinder assembly 80.

The cylinder assembly 80 may be disposed at the other end of the rotating shaft 40. The cylinder assembly 80 is configured to allow the rotary shaft 40 to move up and down, i.e., in the axial direction.

The cylinder assembly 80 may include a cylinder device 82 and a bearing device 90.

The cylinder device 82 is provided to generate a moving force in the axial direction by an external force. The cylinder device 82 may include a moving shaft 84 disposed coaxially with the rotating shaft 40 and spaced apart from the rotating shaft 40. The cylinder device 82 is configured such that the moving shaft 84 can move by an external force. In the present embodiment, the cylinder device 82 describes a pneumatic cylinder, but is not limited thereto. The movable shaft 84 can move in the axial direction through the operation of the cylinder device 82. [

The bearing device 90 is configured to connect the moving shaft 84 and the rotating shaft 40. The bearing device 90 is configured such that the axial movement of the moving shaft 84 is transmitted in an axial movement of the rotating shaft 40. The bearing device 90 is also configured such that the rotation of the rotating shaft 40 is not transmitted to the moving shaft 84. That is, the rotation of the rotating shaft 40 is not transmitted to the moving shaft 84 and the cylinder device 82 by the bearing device 90.

The bearing device 90 may include a device housing 92 defining a bearing space 92a therein. A moving shaft 84 is fixed to one side of the device housing 92 so that the axial movement of the moving shaft 84 can be transmitted in the axial direction of the bearing device 90.

The rotating assembly 30 may include a moving bracket 42.

The movable bracket 42 may be disposed on the other side of the rotating shaft 40. [ In this embodiment, the movable bracket 42 is configured to be screwed to the rotary shaft 40, but is not limited thereto. For example, the movable bracket 42 and the rotary shaft 40 may be integrally formed. The movable bracket 42 may be formed to have an outer diameter larger than the outer diameter of the body of the rotary shaft 40. [ The movable bracket 42 may be a constitution of the rotating shaft 40. [ The moving bracket 42 may be disposed at the end of the rotating shaft 40 and may be configured to rotate together with the rotating shaft 40 in combination with a coupling boss (not shown) or the like.

The apparatus housing 92 can form a bearing space 92a into which the other end of the rotating shaft 40 is inserted. The movable bracket 42 can be positioned in the bearing space 92a. The movable bracket 42 is formed such that its turning radius is larger than the turning radius of the rotating shaft 40. [ The movable bracket 42 may be formed in a substantially disc shape.

The bearing device 90 may include a bearing member 96 and a bearing member 98 disposed within the device housing 92. The support members 96 may be disposed on the upper and lower portions of the movable bracket 42, respectively. The bearing members 98a and 98b may be disposed between the upper surface of the moving bracket 42 and the upper supporting member 96a and between the lower surface of the moving bracket 42 and the lower supporting member 96b. A pair of support members 96 can be fixedly arranged in the apparatus housing 92. [

With this arrangement, the axial movement of the movable shaft 84 is transmitted to the axial movement of the rotary shaft 40, and the rotation of the rotary shaft 40 is transmitted by the support members 96 and the bearing members 98 And is not transmitted to the moving shaft 84.

The rotating shaft 40 is rotated by the driving source 70, and the moving operation in the axial direction is performed by the cylinder assembly 80. That is, the rotating operation and the moving operation of the rotating shaft 40 are performed independently. That is, even if the rotating shaft 40 is moved in the axial direction, the driving force can be transmitted to the driving shaft 70 by the driving source 70.

The operation of the chucking apparatus 20 according to an embodiment of the present invention will be described below.

9 and 10 are diagrams illustrating operations of a chucking apparatus according to an embodiment of the present invention.

The object is moved so that the inner circumferential surface of the object O is positioned outside the chucking unit 60 to fix the object to the chucking apparatus 20. [ The inner peripheral surface P of the object is positioned so that the chucking unit 60 is inserted.

Then, by operating the cylinder device 82 as shown in Fig. 9, the rotating shaft 40 is moved downward in the axial direction. The adjusting member 66 which moves together with the rotating shaft 40 presses the chuck 62 so that the outer diameter of the chuck 62 becomes larger and the chuck 62 having the larger outer diameter presses and fixes the inner circumferential surface P do. When the object is varied, the outer diameter of the chuck 62 can be enlarged to be larger than that of FIG. 10 or smaller than that of FIG. 10 by adjusting the size of the downward movement of the rotary shaft 40.

When the object is fixed by the chucking unit 60 as shown in Fig. 10, the rotational force can be generated by operating the driving source 70. Fig. The rotating force generated in the driving source 70 is transmitted to the rotating boss 32 through the rotating belt 72 and the rotating shaft 40 is rotated together with the rotating boss 32. [ Through this operation, the object fixed to the chucking unit 60 also rotates together. However, since the rotational force of the rotary shaft 40 is not transmitted to the cylinder assembly 80, the cylinder assembly 80 may not rotate despite the rotation of the rotary shaft 40. [

With this configuration, the chucking device 20 can be rotated in the axial direction of the rotary shaft 40 in accordance with the type of the object, and the drive source 70 can rotate the rotary belt 40 regardless of the position of the rotary shaft 40. [ It is possible to transmit the rotational force to the rotating shaft 40 through the rotating shaft 72.

The foregoing has shown and described specific embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the technical idea of the present invention described in the following claims .

1: Measuring device 10: Cradle
12: mounting boss 20: chucking device
30: Rotating assembly 32: Rotating boss
34: power transmitting member 40: rotating shaft
50: Rotary table 60: Chucking unit
62: chuck 66: regulating member
70: driving source 72: rotating belt
80: cylinder assembly 82: cylinder device
90: Bearing device

Claims (7)

A rotary assembly having a rotary shaft and rotatably mounted;
A chucking unit disposed at one end of the rotating shaft and rotating together with the rotating shaft by fixing an inner circumferential surface of the object, the chucking unit having an outer diameter adjusted by axial movement of the rotating shaft;
And a cylinder assembly disposed at the other end of the rotating shaft,
The cylinder assembly includes:
A cylinder device having a moving shaft spaced apart from the rotating shaft in the axial direction and configured to move the moving shaft in the axial direction;
And a bearing device configured to move axially with the moving shaft such that rotation of the rotating shaft is not transmitted to the moving shaft,
The rotating shaft
And a moving bracket formed to have a larger turning radius than the adjacent portion,
The bearing device comprises:
A device housing fixed to the moving shaft, in which the moving bracket is located;
And a pair of support members for restricting axial movement of the movable bracket within the apparatus housing,
Wherein the pair of support members comprise:
And first and second support members fixed to the inside of the apparatus housing and respectively disposed on one side and the other side in the axial direction of the moving bracket. The method according to claim 1,
Wherein the rotating shaft is configured such that the rotating operation about the axis and the moving operation in the axial direction are made independent of each other. The method according to claim 1,
And a driving source for generating a rotational force,
The rotating assembly includes:
And a rotation boss having a hollow portion into which the rotation shaft is slidably inserted, the rotation boss being configured to rotate with the rotation shaft by receiving a rotational force from the driving source. delete delete The method according to claim 1,
The first and second supporting members and the moving bracket are formed in the shape of a circular plate,
The bearing device comprises:
And a first and a second bearing members respectively disposed between the first and second support members and the moving bracket so that the rotation of the rotating shaft is not transmitted to the bearing device and the cylinder device, Chucking device. The method according to claim 1,
The chucking unit includes:
A pressurizing flange fixed to the rotating shaft;
And a chuck that fixes the object by changing an outer diameter of the chuck, the inner surface of the chuck being pressed by the pressurizing flange so that an outer surface of the chuck is expanded.

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