KR102630311B1 - Bearing press machine - Google Patents

Abstract

The present invention is a ball screw consisting of a screw, a nut module in which a plurality of balls are disposed in a coupling area with the screw and a return member for circulation of the balls when the screw rotates, and first and second screws are provided at the bottom and top of the screw. A press fitter for press fit a bearing, comprising: a square base; a bottom block disposed in front of the upper side of the base and having an upward opening inside and a bottom recess in which the first bearing is seated; A middle block disposed on the upper part of the bottom block and having a first middle guide that is front-opened on the inner lower side to support the lower end of the screw and a second middle guide that is front-opened on the inner upper side to accommodate the nut module; A post erected at the rear of the upper side of the base; A lifting block arranged to slide up and down on the post; A top block coupled to the lifting block and having a top hole inside which the second bearing is seated as the upper end of the screw is inserted through the top and bottom blocks; A support block coupled to the lifting block and spaced apart from the upper side of the second bearing seated in the top hole of the top block; and a handling unit for elevating the elevating block, so that a pair of bearings can be simultaneously press-fitted to both ends of the ball screw applied to the OHT, and the bearings can be press-fitted on the same straight line without error. It relates to a simultaneous presser for screw bearings.

Description

Ball screw bearing simultaneous press fitting machine {BEARING PRESS MACHINE}

The present invention is an OHT (Overhead Hoist Transport) that is mounted and operated on a hoist to transport a semiconductor wafer carrier to a specific location in a semiconductor production facility by simultaneously press-fitting bearings on both ends of the ballscrew constituting the OHT. This is a technology related to simultaneous ball screw bearing press insertion that allows this.

OHT (Overhead Hoist Transport) is a device installed in semiconductor production facilities that operates along a hoist on the ceiling to transport wafer carriers according to each process in the production facility.

In addition, ballscrews are applied to OHT for driving, and the technology for press-fitting bearings on both ends of these ballscrews, etc.

Republic of Korea Utility Model Registration No. 20-0144541 (registered on February 4, 1999, hereinafter referred to as ‘Document 1’) 『Bearing Press Fitting Device』 is presented,

Document 1 includes a rotating material mounting table on which a rotor is mounted; A press-fit cylinder whose body and piston rod are each coupled to a pair of moving blocks that move along a guide rail fixed to the frame, and on the same axis as the motor shaft of the rotor mounted on the rotary table. It includes a pair of bearing accommodating parts arranged to face each other and each coupled to the pair of moving blocks, and as the press-fit cylinder is contracted, the pair of bearing accommodating parts come closer to each other, so that there is a pair of bearing accommodating parts on both sides of the motor shaft. a bearing press-fitting portion into which a pair of bearings are press-fitted; a pair of bearing supply units disposed opposite each other to supply bearings to each of the pair of bearing receiving units of the bearing press-fitting unit; and a technology related to a bearing press-fit device having a plurality of stoppers that limit the movement of the moving block so that the bearing supplied from the bearing supply unit can be accurately supplied into the bearing receiving part of the bearing press-fit unit.

As another technology, Korea Patent Registration No. 10-0889664 (registered on March 12, 2009, hereinafter referred to as ‘Document 2’) ‘Bearing press fitting device’ is proposed.

Document 2 is a knuckle seating jig on which a knuckle for an axle assembly of a vehicle is seated; a bearing guide jig that is coupled such that its outer peripheral surface is in close contact with the inner peripheral surface of the knuckle seating jig and guides the insertion position of the bearing inserted into the knuckle; a support block installed at the lower part of the knuckle seating jig to be spaced apart from the lower end of the knuckle seating jig, and forming a pressing force by contacting the knuckle seating jig; An upper jig installed on the upper part of the bearing guide jig and lowered with the bearing seated to press-fit the bearing into the knuckle; By including an up-and-down cylinder installed on one side of the knuckle seating jig and the bearing guide jig to raise and lower the knuckle seating jig through the bearing guide jig, the bearing is stably seated and pressed into the press-fit position, thereby improving the lifespan and press-fit quality of the bearing. This is a technology related to a bearing press fit device that can increase

As another technology, Korea Patent Registration No. 10-1831145 (registered on February 17, 2018, hereinafter referred to as ‘Document 3’) 『Bearing press-fit system』 is proposed.

Document 3 includes a table-shaped main frame that functions as a support, a front transfer unit mounted on the upper surface of the main frame and configured to transfer a pulley to an inner diameter measuring unit and disk to be described later, and a main unit to receive the pulley from the front transfer unit. An inner diameter measuring unit mounted on a frame and configured to inspect the inner diameter of the hole of the supplied pulley, a disc configured to rotate by being mounted on the main frame on which the pulley seated on the inner diameter measuring unit is transported and seated by the transfer unit; A bearing transfer unit mounted on the main frame so as to be disposed on the side of the disk and configured to place a bearing on a pulley mounted on the disk, and mounted on the main frame so as to be disposed on a side of the disk and mounted on the pulley. This is a technology for a bearing press-fitting system that can improve productivity by automating the entire process of inserting a bearing into a pulley by including a bearing press-fitting unit configured to press-fit a bearing.

As another technology, Korea Patent Registration No. 10-1645900 (registered on July 29, 2016, hereinafter referred to as ‘Document 4’) ‘Bearing press fit device for bogie wheel’ is proposed,

Document 4 is a support frame; a pair of side plates protruding from both sides of the upper surface of the support frame along the longitudinal direction of the support frame; a hinge axis fastened across the pair of side plates; a lifting leg that is penetrated on both sides of the hinge axis and rotates up and down; A press-fit tool for setting a bearing on the top of the lifting leg to the bogie wheel; A bearing press-fitting device for a bogie wheel that is fastened to the lower end of the lifting leg and consists of a cylinder that rotates the upper end of the lifting leg up and down, so that it is very easy to move and has remarkable effects such as being easy to lift a bearing with a heavy load. This is a technology about.

Document 1. Republic of Korea Utility Model Registration No. 20-0144541 (registered on February 4, 1999) Document 2. Republic of Korea Patent Registration No. 10-0889664 (registered on March 12, 2009) Document 3. Republic of Korea Patent Registration No. 10-1831145 (registered on February 17, 2018) Document 4. Republic of Korea Patent Registration No. 10-1645900 (registered on July 29, 2016)

The purpose of the present invention is to provide a ball screw bearing simultaneous press fitting machine that allows simultaneous press fitting of a pair of bearings fitted and coupled to both ends of a ball screw.

Furthermore, the purpose of the present invention is to provide a simultaneous bearing press-fitting machine for ballscrews that limits the movement of the ballscrew when press-fitting a bearing and allows the bearing to be press-fitted accurately without error because the bearing is press-fitted in a stable position.

In order to solve the above problems, the ball screw bearing simultaneous press fit according to the present invention,

First and second bearings are press-fitted to the bottom and top of the screw in a ball screw consisting of a screw and a nut module in which a plurality of balls are placed in a coupling area with the screw and a return member for circulation of the balls when the screw rotates. In the press machine for doing so,

square base;

a bottom block disposed in front of the upper side of the base and having an upward opening inside and a bottom recess in which the first bearing is seated;

A middle block disposed on the upper part of the bottom block and having a first middle guide that is front-opened on the inner lower side to support the lower end of the screw and a second middle guide that is front-opened on the inner upper side to accommodate the nut module;

A post erected at the rear of the upper side of the base;

A lifting block arranged to slide up and down on the post;

A top block coupled to the lifting block and having a top hole inside which the second bearing is seated as the upper end of the screw is inserted through the top and bottom blocks;

A support block coupled to the lifting block and spaced apart from the upper side of the second bearing seated in the top hole of the top block; and

a handling unit for elevating the elevating block;

It is characterized by including.

The ball screw bearing simultaneous press fit according to the present invention,

The greatest effect is that a pair of bearings can be press-fitted simultaneously on both ends of a ballscrew applied to OHT, and the bearings can be press-fitted on the same straight line without error.

1 is a three-dimensional diagram showing a simultaneous bearing presser of a ballscrew according to the present invention;
Figure 2 is a front configuration diagram of Figure 1;
Figure 3 is a side configuration diagram of Figure 1;
Figure 4 is a partially enlarged configuration diagram of Figure 2;
Figure 5 is a configuration diagram showing a ball screw with a bearing press-fitted according to one example and another example;
Figure 6 is a side configuration diagram showing the holding unit;
Figure 7 is a partial plan view showing a holding unit.

Hereinafter, preferred embodiments of 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. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so various equivalents that can replace them at the time of filing the present application It should be understood that variations and variations may exist.

Based on Figure 1, the bottom block side is designated as the front or front, and the post side is designated as the rear or rear. Also, based on Figure 1, the base side is designated as the bottom or downward, and the lifting block side is designated as the top. Or, we decide to specify the direction as upward.

In addition, the ball screw 1 referred to in the present invention includes a cylindrical screw 1a having a certain length, a plurality of balls arranged in a coupling area with the screw 1a, and circulation of the balls when the screw 1a rotates. It consists of a nut module (1b) having a return member, and the return member is such that when the screw (1a) rotates, the ball moves between the engaging surfaces between the screw (1a) and the nut module (1b) within the nut module (1b). This is to guide circulation, and since this structure is a known technology, detailed description will be omitted.

As shown in Figures 1 to 7, the ball screw bearing simultaneous pressing machine according to the present invention,

To press fit the first and second bearings 2 and 3 to the lower and upper ends of the screw 1a in the ball screw 1,

It largely consists of a base (10), bottom block (20), middle block (30), post (40), lifting block (50), top block (60), support block (70), and handling unit (80).

Looking at each configuration,

The base 10 is

As shown in Figures 1 to 4,

It is made of a square plate-shaped structure, and support members 11 made of rubber are bolted and placed at the four corner areas of the lower surface to prevent slip.

The bottom block 20 is

As shown in Figures 1 to 4,

It is disposed in front of the upper side of the base 10 and has a flat square block structure with a bottom recess 21 that is opened upward inside and in which the first bearing 2 is seated.

At this time, the bottom block 20 is bolted to the base 10 and can be assembled and disassembled.

The middle block 30 is

As shown in Figures 1 to 4,

A first middle guide 31 disposed on the upper part of the bottom block 20 and having a front opening on the inner lower side to support the lower end of the screw 1a, and a first middle guide 31 having a front opening on the inner upper side to accommodate the nut module 1b. It has a second middle guide (32) and is composed of a rectangular block structure that is long up and down.

At this time, the first middle guide 31 preferably has a diameter corresponding to the screw 1a, and the second middle guide 32 preferably has a diameter corresponding to the nut module 1b. . This is to ensure that the ballscrew 1 can be stably seated and supported by each of the middle guides 31 and 32.

The post 40 is

As shown in Figures 1 to 4,

It is erected at the rear of the upper side of the base 10,

The left and right sides are spaced apart and face each other, and a square plate-shaped plate 41 is further mounted on the top.

The lifting block 50 is

As shown in Figures 1 to 4,

It is arranged to slide up and down on the post 40 and consists of an erect square plate-shaped structure.

The top block 60 is

As shown in Figures 1 to 4,

It is coupled to the lifting block 50 and has a square block structure having a top hole 61 that penetrates up and down inside and into which the upper end of the screw 1a is inserted and the second bearing 3 is seated.

At this time, the top block 60 can be assembled and disassembled by being bolted to the lifting block 50.

And as shown in FIG. 4, a seating guide 62 inclined toward the center is formed in the area around the top hole 61 of the top block 60, so that the second bearing 3 is seated in the top hole 61. Helps with entry and location setting.

The support block 70 is

As shown in Figures 1 to 4,

It has a square block structure that is coupled to the lifting block 50 and spaced apart from the upper side of the second bearing 3 seated in the top hole 61 of the top block 60.

At this time, the support block 70 is bolted to the lifting block 50 and can be assembled and disassembled.

Ultimately, the bottom block 20, middle block 30, top block 60, and support block 70 can be assembled and disassembled with the corresponding coupling object, so in other words, the bottom block ( 20) can be assembled and separated, the middle block 30 can be assembled and separated from the bottom block 20, and the top block 60 and the support block 70 can be installed on the lifting block 50. Since it is possible to assemble and separate the ball screw (1), press-fitting work can be performed by replacing it with blocks that match it depending on the type or size of the ball screw (1).

Therefore, when the lifting block 50 is lowered by operation of the handling unit 80, the support block 70 is also lowered and the second bearing 3 seated in the top hole 61 of the top block 60 This is press-fitted onto the top of the screw (1a) of the ball screw (1). At this time, since the support block 70 has a square block structure, the second bearing 3 is pressed into the top of the screw 1a until it contacts the top of the screw 1a and the lower surface of the support block 70. do. (See [A] in Figure 5)

And as shown in FIG. 4, a guide hole 71 is formed inside the support block 70, which penetrates up and down and into which the upper end of the screw 1a is inserted when the lifting block 50 is lowered. This guide hole 71 is seated in the top hole 61 of the top block 60 so that when the lifting block 50 is lowered by the operation of the handling unit 80, the support block 70 is also lowered. When the second bearing (3) is press-fitted onto the top of the screw (1a) of the ball screw (1), the second bearing ( 3) can be guided to be placed by press-fitting it. In addition, this guiding operation is performed by flipping the screw (1a) up and down in a state where the first bearing (2) is press-fitted to the lower end of the screw (1a), and then the first bearing (2) side is connected to the top block (60). After being seated in the top hole 61, the handling unit 80 is operated to lower the support block 70 to shift the position of the first bearing 2 to the lower side. can contribute to (See [B] in Figure 5)

The handling unit 80 is

As shown in Figures 1 to 4,

To elevate the lifting block 50,

A rail 81 arranged vertically on the post 40,

A slider 82 that is coupled to the rail 81 and slides up and down and on which the lifting block 50 is mounted,

A handle 83 having a shaft 831 arranged to rotate up and down on the post 40 and a knob 832 coupled to an end thereof,

A pinion gear 84 axially coupled to the shaft 831 of the handle 83, and

A rack gear 85 is disposed vertically on the elevating block 50 and meshes with the pinion gear 84.

It is made including.

At this time, as shown in FIGS. 1 and 3, the handling unit 80 further includes a gripper 86 mounted on the post 40 and into which the knob 832 of the upwardly rotated handle 83 is inserted. It is provided. This gripper 86 limits the rotation radius of the handle 83 and allows the handle 83 to be temporarily mounted and fixed.

Therefore, as shown in FIG. 3, when the knob 832 of the handle 83 is held and lowered downward, the slider 82 is moved to the lower side along the rail 81 by each gear 84 and 85. The lifting block 50 and the top block 60 and support block 70 coupled thereto are also lowered.

In the end, the first bearing 2 is placed in the bottom recess 21 of the bottom block 20, the second bearing 3 is placed in the top hole 61 of the top block 60, and the The tip and support blocks (60, 70) are lowered by operation of the handling unit (80) with the ball screw (1) arranged to be accommodated and supported in the first and second middle guides (31, 32). Each bearing (2, 3) is simultaneously press-fitted to the top and bottom of the screw (1a).

Meanwhile, the ball screw bearing simultaneous press fit according to the present invention further includes a holding unit 90.

The holding unit 90 is

As shown in Figures 6 and 7,

This is to limit the movement of the ball screw (1) when the bearing is pressed into the screw (1a) of the ball screw (1),

A C-shaped holding head (91) facing the second middle guide (32) of the middle block (30),

A pair of guide grooves 92 formed to be recessed forward and backward on the left and right side walls of the middle block 30,

A pair of rods (93) connected to both ends of the holding head (91) and inserted and seated to slide back and forth along each guide groove (92),

Links 94 interconnecting the ends of each rod 93,

A bobbin (95) axially coupled to the shaft (831) of the handle (83),

A wire 96 interconnecting the link 94 and the bobbin 95, and

It is rotatably mounted on the post 40 and guides each rod 93 to move linearly in the horizontal direction when the wire 96 is wound around the bobbin 95 when the handle 83 is operated. ) Roller (97) supporting

It is made including.

At this time, the holding head 91 may be made of an elastic material, or a separate elastic member may be attached to the inner surface.

In addition, each guide groove 92 preferably has a groove structure corresponding to the upper and lower width and thickness of the rod 93.

As a result, as shown in FIG. 6, when the shaft 831 rotates by manipulating the handling unit 80, the bobbin 95 coupled thereto also rotates so that the wire 96 is wound around the bobbin 95. As a result, the holding head 91 retracts and presses and secures the nut module 1b of the ballscrew 1 seated on the second middle guide 32.

And when the shaft 831 is reversely rotated by operation of the handling unit 80, the wire 96 is released from the bobbin 95, thereby causing the nut module 1b of the ballscrew 1 to be released. The pressure of the holding head 91 is released.

And as shown in FIG. 7, the middle block 30 is installed so that the holding head 91 can be returned to its original position when the holding head 91 is pressed against the nut module 1b of the ball screw 1. ) and the link 94, it is desirable to further interpose an elastic spring 98. Ultimately, when the holding head 91 retracts, the elastic spring 98 stretches, and when the wire 96 is released from the bobbin 95, the elastic spring 98 is elastically restored, so that the holding head 91 ) can be returned to its original position.

In the above description of the present invention, the "ballscrew bearing simultaneous presser" having a specific shape and structure has been described with reference to the accompanying drawings. However, the present invention can be modified and modified in various ways by those skilled in the art, and such modifications and changes are possible. Changes should be construed as falling within the scope of protection of the present invention.

1: Ball screw
1a: screw
1b: Nut module
2: 1st bearing
3: 2nd bearing
10: base
11: Support member
20: Bottom block
21: Bottom recess
30: Middle block
31: 1st middle guide
32: 2nd middle guide
40: post
41: plate
50: Elevating block
60: Top Block
61: Top hole
62: Seating guide
70: Support block
71: Guide hole
80: handling unit
81: rail
82 : Slider
83: handle
831: shaft
832: knob
84: pinion gear
85: rack gear
86: Gripper
90: holding unit
91: holding head
92: Guide home
93: load
94: link
95: Bobbin
96: wire
97: roller
98: elastic spring

Claims (7)

In the ball screw 1, which consists of a screw 1a and a nut module 1b having a plurality of balls disposed in a coupling area with the screw 1a and a return member for circulation of the balls when the screw 1a rotates. In the press fitting machine for press fitting the first and second bearings (2, 3) to the lower and upper ends of the screw (1a),
square base (10);
A bottom block (20) disposed in front of the upper side of the base (10) and having a bottom recess (21) that is opened upward inside and in which the first bearing (2) is seated;
A first middle guide 31 disposed on the upper part of the bottom block 20 and having a front opening on the inner lower side to support the lower end of the screw 1a, and a first middle guide 31 having a front opening on the inner upper side to accommodate the nut module 1b. A middle block (30) having a second middle guide (32);
A post (40) erected at the rear of the upper side of the base (10);
A lifting block 50 arranged to slide up and down on the post 40;
A top block (60) coupled to the lifting block (50) and having a top hole (61) that penetrates up and down inside and into which the upper end of the screw (1a) is inserted and the second bearing (3) is seated;
A support block 70 coupled to the lifting block 50 and spaced apart from the upper side of the second bearing 3 seated in the top hole 61 of the top block 60; and
A handling unit 80 for lifting the lifting block 50;
Including,
The handling unit 80 includes a rail 81 arranged vertically on the post 40, a slider 82 that is coupled to the rail 81 and slides up and down and on which the lifting block 50 is mounted. , a handle 83 having a shaft 831 arranged to rotate up and down on the post 40 and a knob 832 coupled to an end thereof, and an axis coupled to the shaft 831 of the handle 83. It consists of a pinion gear 84 and a rack gear 85 that is arranged vertically on the elevating block 50 and engages with the pinion gear 84,
The handling unit 80 is further provided with a gripper 86 mounted on the post 40 and into which the knob 832 of the handle 83 rotated upward is inserted,
A C-shaped holding head 91 facing the second middle guide 32 of the middle block 30, and a pair of guide grooves 92 formed to be recessed forward and backward on the left and right side walls of the middle block 30. ) and a pair of rods 93 that are connected to both ends of the holding head 91 and are inserted and seated to slide back and forth along each guide groove 92, and the ends of each rod 93 are connected to each other. A link 94, a bobbin 95 axially coupled to the shaft 831 of the handle 83, and a wire 96 interconnecting the link 94 and the bobbin 95, It is rotatably mounted on the post 40 and guides each rod 93 to move linearly in the horizontal direction when the wire 96 is wound around the bobbin 95 when the handle 83 is operated. ) A bearing simultaneous presser for a ballscrew, characterized in that it further includes a holding unit (90) consisting of a roller (97) supporting the bearing.
According to claim 1,
A ball screw bearing simultaneous press fitter, characterized in that a seating guide (62) inclined toward the center is formed in the area around the top hole (61) of the top block (60).
According to claim 1,
The support block 70 is formed with a guide hole 71 that penetrates up and down inside and into which the upper end of the screw 1a is inserted when the lifting block 50 is lowered. .
According to claim 1,
It is possible to assemble and separate the bottom block 20 from the base 10,
It is possible to assemble and separate the middle block 30 from the bottom block 20,
A ball screw bearing simultaneous press fitter, characterized in that the top block (60) and the support block (70) can be assembled and separated from the lifting block (50).
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