KR101935041B1 - Apparatus for Assembling Bearing - Google Patents

Abstract

The present invention relates to an apparatus for assembling a bearing, which is for assembling a bearing to a hub. More specifically, the apparatus for assembling a bearing comprises: a working unit to assemble a plurality of bearings in a hub; and a transfer unit provided at an external side of the working unit to transfer the bearings.

Description

[0001] Apparatus for Assembling Bearing [0002]

The present invention is directed to an apparatus for assembling bearings on a hub.

In the patent document 001, the press-fit structure of the hub and the hub bearing includes a hub bearing 12 to which an axle is fastened at a portion where the wheel of the vehicle is connected to the axle, Wherein a plurality of fastening surfaces (11a) are continuously formed along the periphery of the inner surface of the hub (11) at one end of the hub (11), and the hub (11) And the outer surface of the outer ring of the bearing 12 is continuously formed in a plane corresponding to the engagement surface 11a.

Patent Document 002 describes an initial member manufacturing step of manufacturing an initial member for a hub such that an initial member for a hub to be formed into a hub of the hub bearing assembly has a concave portion on the inner end peripheral surface; An inner ring manufacturing step of manufacturing an inner ring having an inner circumferential surface, an inner surface, and a connecting surface connecting the inner circumferential surface and the inner surface; An inner ring mounting step of fitting the inner ring to the hub initial member such that a connecting surface of the inner ring is located in a region facing the concave portion; And a forging step of forging the inner end of the initial member for the hub into the hub.

Patent Document 003 discloses a wheel bearing having a hub and an inner ring, a hub disposed to rotate, an inner ring coupled to the hub, an outer ring disposed at a predetermined interval from the outer circumferential surface of the inner ring, a rolling member interposed between the inner ring and the outer ring, And a fastening portion fastened to an inner side end portion of the hub and the inner ring of the inner ring and rotating together with the hub and the inner ring, wherein an inner ring spline and a hub spline are formed at an inner side end portion of the inner ring and the hub, respectively, A coupling part spline which is engaged with the inner ring spline and the hub spline may be formed. The hub spline and the inner race spline may be formed along an inclined line whose length from the rotation axis is long inward from the outside of the vehicle body.

Patent Document 004 discloses a hub having a disk-shaped wheel coupling portion coupled with a wheel, a hub having a bearing mounting portion protruding from the wheel coupling portion by hollowing and having a first face spline formed on the protruded surface, And the second face spline is formed on one surface of the lower end. Since the face spline is provided on each of the hub and the bearing, the rotation of the drive shaft and the rotation of the hub and the bearing are both synchronized Thereby providing a hub bearing having an effect of preventing a slip between the hub and the bearing even if the vehicle is stopped and accelerated rapidly.

KR 10-2018-0069485 A (June 25, 2018) KR 10-1407323 B1 (June 09, 2014) KR 10-1411617 B1 (June 18, 2014) KR 10-2015-0051417 A (May 13, 2015)

The present invention relates to a bearing assembly apparatus, and aims to assemble a hub and a plurality of bearings.

The present invention has been made to solve the problems of the prior art,

The bearing assembly 20 includes a working portion 100 for fixing a hub 10 for inserting a plurality of bearings 20 and a bearing portion 20 located outside the working portion 100 for conveying and assembling the bearing 20, And a conveying unit 200 for conveying the sheets.

The present invention relates to a bearing assembly apparatus. In the above-described working unit and transfer unit, the working unit 100 includes a working bed 110 for fixing one side of the hub 10, And a chamber 120 formed adjacent to each other and accommodating the hub 10 and the bearing 20, respectively.

The bearing unit 200 includes a bearing unit 300 located outside the working unit 100 and a bearing unit 300 coupled to the bearing unit 300. The bearing unit 300 conveys the bearing unit 300, (400) for selectively gripping the movable member (20).

The assembly unit 400 includes a movable body 410 installed on the mount 300 and horizontally, vertically, or rotationally movable, a movable body 410 mounted on the movable stand 410, And a grip body 420 for selectively gripping the bearing 20. The grip body 420 includes a plurality of bearings.

The present invention relates to a bearing assembly apparatus, and includes a vision sensor (500) formed on the grip body (420) to determine a state of engagement of the bearing (20).

The bearing assembly apparatus of the present invention has a heating chamber and a low-temperature chamber formed adjacent to the assembly work, which has the effect of being assembled before the shape change of the heated hub and the cooled bearing.

The bearing assembly apparatus of the present invention has an effect of effectively grasping and accurately engaging the periphery of a bearing in a circular shape.

The working bed of the present invention has the effect of transferring the hub from the high temperature chamber quickly and accurately to the working position.

1 is a front view showing a bearing assembly apparatus according to the present invention;
2 is a side view of the working portion of the bearing assembly apparatus of the present invention.
3 is a perspective view showing a state in which a bearing is assembled to a hub of the present invention;
FIG. 4 is a cross-sectional view showing a bearing assembled to the hub shown in FIG. 3; FIG.
5 is a perspective view showing the assembly stand of the present invention.
6 is a view showing an example of fixing a bearing in an assembling stand of the present invention.
7 is a view showing an example in which a vision sensor according to another embodiment of the present invention is lifted and lowered on an assembly table.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1-1) A bearing assembling apparatus of the present invention comprises:

(100) for fixing a hub (10) for inserting a plurality of bearings (20);

And a transfer unit 200 located outside the working unit 100 and transferring and assembling the bearing 20.

The present invention relates to a bearing assembly apparatus, and more particularly to a device for assembling a bearing (20) inside a hub (10) supporting a rotor or a rotary shaft. The working unit fixes the hub, and the transfer unit transfers the bearing to the inside of the hub. The transfer part grasps the bearing near the workbench and transfers it to the inside of the hub, and seats the bearing at the correct position. The working unit may be integrally fixed to the transfer unit or separately installed.

(Example 1-2) The bearing assembling apparatus of the present invention is the apparatus according to Embodiment 1-1, wherein the hub includes a receiving space 30 for inserting a bearing 20 therein.

The receiving space seats and engages the bearings. The bearings are formed in plural as described later. The hub and bearing must be precisely engaged. In order to realize this, the periphery in the accommodation space and the outer periphery of the bearing are formed to have the same dimensions. Preferably, in order to improve the coupling force between the bearing and the hub, the periphery of the accommodation space is formed to be smaller than the outer periphery of the bearing. However, this reduces the ease of bonding. To overcome this, the hub is heated to inflate, and the bearing is cooled and contracted. After joining, the bearing is stretched by the thermal equilibrium, and the hub is contracted and the bonding surface generates bonding stress. Since the bonding stress is formed with a uniform stress on the outer periphery of the bearing, the bonding stress is stable and the complete bonding condition can be satisfied.

(Embodiment 1-3) In the bearing assembling apparatus of the present invention, in the embodiment 1-2, the bearing (20) has a lower bearing (21) coupled with the inner side of the hub (10) And an upper bearing (23) which is brought into contact and is coupled to the hub.

The bearings may be integrally formed or formed in plural. When formed in plural, it is preferable that they are separated into two. The two separate bearings take the shape of an axially perpendicular cut. This can prevent a change in the sway caused by shrinkage and expansion, and the two separate bearings can stably support the rotor despite the damage of one bearing.

(Embodiment 1-4) The bearing assembling apparatus of the present invention includes the inner plate 22 which is bent at one inner peripheral edge of the cylindrical lower bearing 21 and engages with the inside of the hub in Embodiment 1-3 .

(Example 1-5) The bearing assembling apparatus of the present invention includes the fixing plate 24 that is bent at the side outer periphery of the cylindrical upper bearing 23 and engages with the inside of the hub in Examples 1-3.

The present invention discloses an inner plate (a bent end of a lower bearing) and a fixing plate (a bent end of an upper bearing). The inner plate and the fixed plate are in contact with the hub inner step, and the contact portions are bolted. Since the fastening is performed by heat shrinkage and forced fastening (bolt fastening), double fastening properties are ensured. Therefore, a stable fastening effect can be obtained. Specifically, since the rotor rotates at a high speed, heat can be generated, and a high torque is generated. The bearing is deformed by the heat and torque, and the deformed bearing can be released or rolled away from the hub. To prevent this, a double fastening structure is formed. For fastening the bolts, the inner plate and the fixing plate form a plurality of fixing holes 40, and the bolts of the same size are engaged with the same tightening torque. The fixing holes are arranged at regular intervals. The uniform spacing is to evenly distribute the uniform forces acting on the bearings.

(Examples 1-6) The bearing assembling apparatus of the present invention includes the engaging jaws 25 formed on the lower bearing and the upper bearing, which are formed on the mutual contact surfaces and are stepped, according to Embodiment 1-3.

The joining jaw of the present invention defines the joining position of the upper bearing and the lower bearing, and the position of the joining jaw is located at the two bearing contact surfaces. The engagement position limitation uses the projecting step of the engagement jaw. The step coupling is made in pairs. Thus, the stepped connection can specify the exact position. Further, when any one of the two bearings is rotated, the step can prevent rotation.

(Example 2-1) A bearing assembling apparatus of the present invention is the bearing assembling apparatus of Embodiment 1-1,

The working unit 100 includes a work bed 110 for fixing one side of the hub 10;

And a chamber 120 disposed adjacent to the work bed 110 and formed of a plurality of chambers for receiving the hub 10 and the bearing 20, respectively.

(Example 2-2) The bearing assembling apparatus of the present invention is the same as Embodiment 2-1, except that the chamber 120 is located on the upper side and / or the side surface of the work bed 110, And a low-temperature chamber (140) located on both sides of the working bed (110) and accommodating the respective bearings therein and maintaining a low temperature state.

The present invention relates to a working bed and a chamber. The working bed is a configuration for assembling the parts (hub, upper bearing, lower bearing), and the chamber forms a thermal deformation of the part before assembling the part. In order to improve the transport efficiency of the parts for assembly, it is preferable to arrange the chamber near the work bed. The chamber comprises a first chamber (high temperature chamber) for storing the hub, a second chamber (low temperature chamber) for storing the upper bearing, and a third chamber (low temperature chamber) for storing the lower bearing do. The first chamber is supplied with heat by a heat supply device, and the hub housed in the first chamber is heated and thermally expanded. On the other hand, the second chamber and the third chamber respectively receive and cool the upper and lower bearings separately. This is to shrink the upper and lower bearings. The thermal expansion of the hub and the shrinkage of the bearing are performed before assembly, and after the assembly, they are re-deformed at room temperature, so that a heat shrinkage effect can be obtained. The second chamber and the third chamber receive liquefied nitrogen within the enclosed chamber vessel and the upper and lower bearings are received within the liquefied nitrogen and contracted in a minus 196 degree atmosphere.

(Embodiment 2-3) The bearing assembling apparatus of the present invention is the same as Embodiment 2-2 except that a rail 132 coupled to a lower portion of the high-temperature chamber 130, one side of which is seated on the rail, And a frame 131 for fixing.

The hub is accommodated in the high-temperature chamber and then transferred to the working bed. The transport utilizes frames and rails. The rails extend to the high temperature chamber and the working bed, and the frame moves along the rail top. Therefore, the rails and the frame can transfer the weighted hub with a small force and can be transported to the correct position. The hub is seated on one side of the frame, and the rail supports the other side of the frame. The hub and frame are secured using a clamp. The clamp may selectively detach the hub.

(Embodiment 2-4) The bearing assembling apparatus of the present invention includes, in Embodiment 2-3, an elevating door 133 formed on one surface of the high-temperature chamber 130 and opening and closing one surface of the high-temperature chamber.

The high-temperature chamber forms an enclosed space. Some of the enclosed space is open only during hub transfer. The door opening is performed by vertically operating the door. This is to prevent interference between the door and the rail. The upward and downward movement of the door is operated along the door rail or along the door link. The door operation must be performed rapidly. This is to prevent heat release inside the chamber. In another embodiment, high pressure air is discharged to the lower portion of the door. This is to obtain an air curtain effect. It can also reduce the shock before full closure. High pressure discharge utilizes a plurality of nozzles, which utilize heated air inside the chamber.

(Example 2-5) The bearing assembling apparatus of the present invention is similar to the bearing assembling apparatus of Example 2-3 except that the heating device 134 for controlling the internal temperature of the high temperature chamber 130 and the temperature sensor 135 for measuring the internal temperature are included do.

Embodiment 2-5 The high-temperature chamber 130 of the present invention is provided with a heating device 134 coupled to one side of the high-temperature chamber 130 for supplying heat to the interior of the high-temperature chamber 130 for expanding the hub 10. The heating device 134 supplies heat by various methods such as a hot air heater and a heater, and one end of the heating device 134 may be formed through the high temperature chamber 130 or may be provided on the inner side of the high temperature chamber 130 to raise the temperature. The temperature sensor 135 measures the temperature rising by the heating device 134 to adjust the degree to which the hub 10 is inflated.

(Embodiment 2-6) In the bearing assembling apparatus of the present invention, in the embodiment 2-2, the low temperature chamber 140 is located at one side of the working bed 110, and the lower bearing 21 is kept at low temperature And a second low temperature chamber (142) located at the other side of the working bed (110) and storing the upper bearing (23) at a low temperature.

Example 2-6 The low temperature chamber 140 of the present invention has the first low temperature chamber 141 and the second low temperature chamber 142 respectively coupled to both sides of the working bed 110 and the lower bearing (21) and an upper bearing (23) are respectively stored. The first low temperature chamber 141 and the second low temperature chamber 142 are positioned on both sides of the working bed 110 so that the conveyance unit 200 moves horizontally and the bearing 20 can be transferred.

Embodiment 2-7 The bearing assembling apparatus of the present invention is a bearing assembling apparatus according to Embodiment 2-6, which includes an opening / closing door 143 located above the low temperature chamber 140 and opened / closed according to the entrance / exit of the bearing 20 do.

Embodiment 2-7 The low temperature chamber 140 of the present invention maintains a low temperature as it is opened and closed at the upper portion and the opening and closing door 143 is opened and closed to transfer the bearings 20 provided in the low temperature chamber 140, . The first and second low temperature chambers 141 and 142 may be opened in different directions so that the opening and closing door 143 is not caught by the working bed 110.

(Embodiment 2-8) In the bearing assembling apparatus of the present invention, the low temperature chamber 140 includes a cooling device 144 for controlling the internal temperature, a temperature sensor 135 for measuring the internal temperature, .

Examples 2-8 The cryogenic chamber 140 of the present invention is provided with a cooling device 144 having a liquefied nitrogen and a cooling pen inside to lower the temperature of the bearing 20. The cooling device 144 may have one end formed through the low temperature chamber 140 or may be provided on the inner side surface of the low temperature chamber 140 to shrink the bearing 20. [ And the temperature sensor 135 can measure the temperature inside the low temperature chamber 140 which is lowered by the cooling device 144. [

As the bearing 20 to be retracted is inserted into the hub 10 which is expanded by the high temperature, the distance between the hub 10 and the bearing 20 is formed to be wider so that the assembly is easier. When the size of the bearing 20 and the hub 10 is returned to the original state at room temperature, the assembly of the bearing 20 and the hub 10 can be accurately performed.

(Example 3-1) The bearing assembling apparatus of the present invention is the same as the example 2-1,

The transfer unit 200 includes a cradle 300 positioned outside the work unit 100;

And an assembling stand 400 which is coupled with and transports the cradle 300 and selectively grasps the bearing 20.

The present invention relates to a stand and an assembly stand. The cradle is formed on the outside of the working bed, and the cradle is mounted on the cradle and moved. The cradle and the assembly stand take a rectangular coordinate operating structure. Cylindrical coordinates and a polar coordinate operating structure can be taken as needed. The cradle can be integrally formed with or separated from the working bed. When separated, the vibration generated during assembly versus movement is not transmitted to the working bed. In the case of integrating the above, the installation effect of the cradle and the workbench can be enhanced. The cradle must maintain high rigidity, which is to increase resistance to sag and vibration. The assembly must be precisely operated. To achieve this, a precision transfer device is attached between the stand and the assembly stand. The precision transfer apparatus uses a horizontal transferring bearing (LM guide or rack gear).

(Embodiment 3-2) In the bearing assembling apparatus of the present invention, in the embodiment 3-1, the cradle 300 includes a fixing table 310 fixed to the floor at both sides of the working unit 100.

(Embodiment 3-3) The bearing assembling apparatus of the present invention includes the horizontal bar 320, which is fixed to both sides of the fixing table, and in which the assembly table 400 horizontally moves, according to Embodiment 3-2.

The cradle of the present invention is formed perpendicular to the paper surface, and forms one or more than two cradles. A horizontal bar is attached to the fixing table in a horizontal direction. The horizontal bar may be an LM guide or a rack gear as described above.

(Embodiment 4-1) In the bearing assembling apparatus of the present invention, in the embodiment 3-1,

The assembly stand 400 includes a moving body 410 mounted on the stage 300 and horizontally, vertically, or rotated.

And a grip body 420 coupled to the moving body 410 and selectively gripping the bearing 20.

The present invention is mounted on a cradle 300 and includes a moving body 410 that moves horizontally and vertically, and the moving body 410 forms a vertically moving grip body 420. Movements of the moving body and the grip body are moved by the actuator 443, and the movement is controlled by the error device.

(Embodiment 4-2) In a bearing assembling apparatus according to Embodiment 4-1, the moving body 410 includes a horizontal moving body 411 installed on a horizontal bar 320, a horizontal moving body 411 And a vertical moving body 412 vertically moving.

The moving body 410 of the present invention is mounted on the horizontal bar 320 and mounted on the horizontal moving body 411 for horizontally conveying the bearing 20 and the horizontal moving body 411 and is gripped by the cylinder and the actuator 443, The vertical moving body 412 for moving the body 420 in the vertical direction is formed. The vertical moving body 412 protrudes from the inside of the horizontal moving body 411 and is adjusted in length.

(Embodiment 4-3) In the bearing assembling apparatus of the present invention, in the embodiment 4-2, the grip body 420 includes a grip body 430 coupled to an end of the moving body 410; And a finger 440 which is selectively protruded.

The grip body is formed at the vertical moving body end and is vertically moved. A plurality of fingers are formed on the grip body. The finger protrudes from the grip body. That is, the plurality of fingers contact the upper bearing or the lower bearing inner circumferential surface of the circular shape to grasp the bearing. Preferably three fingers. This is to stably support the inside of the cylinder.

(Embodiment 4-4) In the bearing assembling apparatus of the present invention, the finger 440 is formed on the outer side surface of the grip body 430, 441), and a grip shaft 442 projecting from the finger cylinder 441.

(Embodiment 4-5) In the bearing assembling apparatus of the present invention, in Embodiment 4-4, the finger 440 includes an actuator 443 for operating the grip shaft 442.

The fingers form a gripping axis that moves in a horizontal direction, and the gripping axis is moved within the finger cylinder. The finger cylinders are disposed at an equal angle, and the grip shafts may protrude from one another in the same or different directions. The grip shaft is actuated by an actuator, which ensures low temperature operability.

(Embodiment 4-6) The bearing assembling apparatus of the present invention includes a contact body 444 which is located at an end of the finger 440 and contacts the inner side surface of the bearing 20, according to Embodiment 4-5 .

A contact body is formed at the grip shaft end portion. The contact member is in direct contact with the inner peripheral surface of the bearing. Therefore, it is necessary to form a curvature smaller than the inner circumferential surface of the bearing. In addition, frequent contact occurs in extreme temperature condition, and wear may occur. That is, life is very low and should be easily replaceable. In order to realize this, the grip shaft end portion is easily detachable. Specifically, it is preferable to take a groove and a projection shape. At low temperatures, the metal is brittle and there is a risk of breakage. Use materials that are more brittle than bearings. This is to induce the object to be broken in the grip to the contact body.

(Example 5-1) In the bearing assembling apparatus of the present invention, in Example 4-1 or Example 4-3,

And a vision sensor 500 formed on the grip body 420 for determining a state of engagement of the bearing 20.

The vision sensor 500 of the present invention is formed in the grip body 430 and has a purpose of checking and controlling the position in real time during the process of entering the grip body into the bearing.

(Embodiment 5-2) A bearing assembling apparatus of the present invention is the same as Embodiment 4-2 or Embodiment 5-1, except that the sensor case 510 located at the lower end of the grip body 420, the sensor case 510 And a plurality of vision sensors 500 formed on the display panel 500.

The vision sensor of the present invention is formed of a camera, and a plurality of positions are discriminated by a plurality of sensors for accurate measurement. Especially, it is arranged at an equilateral angle to the triangular position, and the accuracy of entry of the grip body is confirmed in real time by three-point measurement.

(Embodiment 5-3) The bearing assembling apparatus of the present invention includes the sensor elevating apparatus 520 for ascending or descending the sensor case 510 according to Embodiment 5-2.

The vision sensor of the present invention enters the inside of the cooling apparatus for the liquefied nitrogen, and sensor breakage may occur at a low temperature. In order to prevent this, a certain position is reached, and when a certain limit is reached, only the grip body should be entered. To accomplish this, the sensor platform is mounted so that it can move only a certain distance.

(Example 5-4) The bearing assembling apparatus of the present invention includes the airtightness device 530 located between the sensor case 510 and the grip body 420 according to the embodiment 5-3.

The sensor case protects the vision sensor. The sensor case is in contact with the grip body, each of which is individually actuated. Therefore, an airtight device is mounted on the contact portion, and the airtight device is used for the purpose of blocking the entry of the cooling fluid in the cooling environment.

10: hub 20: bearing
21: lower bearing 22: inner plate
23: upper bearing 24: fixed plate
25: coupling jaw 30: accommodation space
31: Leakage prevention jaw 40: Fixing hole
100: working part 110: working bed
120: chamber 130: high temperature chamber
131: frame 132: rail
133: lifting door 134: heating device
135: Temperature sensor 140: Low temperature chamber
141: first low temperature chamber 142: second low temperature chamber
143: opening / closing door 144: cooling device
200: Feeder 300: Cradle
310: fixed base 320: horizontal bar
400: Assembly stand 410: Moving body
411: horizontal moving body 412: vertical moving body
420: grip body 430: grip body
440: Finger 441: Finger cylinder
442: Grip shaft 443: Actuator
444: Contactor 500: Vision sensor
510: sensor case 520: sensor lifting device
530: airtight device

Claims (5)

In a bearing assembly apparatus,
(100) for fixing a hub (10) for inserting a plurality of bearings (20);
A transfer unit 200 located outside the working unit 100 for transferring and assembling the bearing 20;
The working unit 100 includes a work bed 110 for fixing one side of the hub 10;
A chamber 120 disposed adjacent to the work bed 110 and formed of a plurality of chambers for respectively receiving the hub 10 and the bearing 20;
The bearing (20) includes a lower bearing (21) coupled with an inner surface of the hub (10),
An upper bearing (23) which is in contact with one surface of the lower bearing and is coupled to the hub;
A coupling jaw (25) formed on the lower bearing and the upper bearing, the coupling jaw (25) being formed on the mutual contact surface
A high-temperature chamber 130 located above and / or on the side of the work bed 110 to receive the hub 10 and maintain a high temperature state;
And a low temperature chamber (140) located on both sides of the working bed (110) and accommodating the respective bearings therein and maintaining a low temperature state.
delete The method according to claim 1,
The transfer unit 200 includes a cradle 300 positioned outside the work unit 100;
And an assembling stand (400) for engaging and conveying the holder (300) and selectively gripping the bearing (20).
The method of claim 3,
The assembly stand 400 includes a moving body 410 mounted on the stage 300 and horizontally, vertically, or rotated.
And a grip body (420) coupled to the moving body (410) and selectively gripping the bearing (20).
The method of claim 4,
And a vision sensor (500) formed on the grip body (420) for determining a state of engagement of the bearing (20).

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