JP2789999B2 - Work placement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary lubricating apparatus for connecting a lubricating area of a work mounting table opposed to a predetermined work assembling apparatus to an oil supply source on a base side, and in particular, a rotary base forming a work mounting table. The present invention relates to a rotary lubricating device in which a plurality of work placement units are provided, and a plurality of lubricating areas are connected to a lubrication source on the base side.

[0002]

2. Description of the Related Art Conventionally, in an assembling work for assembling predetermined parts onto a work, works supplied sequentially by a conveying means are continuously set at an assembling position for a fixed assembling work time, during which the work is assembled. The assembly work is performed by the device. In this case, the assembling apparatus performs part incorporation and refueling on the work supported by the predetermined work mounting table at the assembly position. By the way, the type of the work conveyed to the assembling position may be different. In such a case, the work mounting device prepares a plurality of the work mounting portions and selectively selects the work mounting portion corresponding to each work. And work for assembling parts. Accordingly, each work placement section is provided with various sensors for detecting actual data that needs to be controlled in association with the assembling work. Further, when a lubricating area is provided on each work placing device, when lubricating the lubricating area on those work placing devices, a lubrication source on the base side and each lubricating area on each work placing device are provided. It is necessary to communicate with the refueling area.

For example, a cylinder block redirection device 100 as a work mounting table shown in FIG. 10 includes a swing table 102 on which a cylinder block 101 conveyed to a conveyor (not shown) can be mounted at an assembly position. A pair of rotating shafts 104 and 105 integrated with the moving table 102
It is supported on the 03 side via a bearing 106. Rocking table 1
An arm 107 protrudes from the rotary shaft 104 integrated with the hydraulic cylinder 02, and a hydraulic cylinder 109 is connected to the arm 107 via a rod 108 which is pin-connected to the arm 107. The hydraulic cylinder 109 can switch the cylinder block 101 on the rocking table 102 by 90 degrees by the switching drive, and the cylinder block 10 on the rocking table 102 alternately reaches both positions.
1 is sequentially assembled at each switching position. By the way, a hydraulic actuator and a refueling area (not shown) are provided on the rocking table 102, and each refueling passage communicating therewith is connected to a refueling source (not shown) on the base side via a rotary refueling device A.

[0004] The rotary refueling device A used here
As shown in FIG. 11, a fixed cylinder 110 supported on a base frame 103 via a bracket (not shown) and a switching shaft 11 on a rotating shaft 105 side rotatably fitted in the fixed cylinder.
1, four vertical oil passages 113 (only two are shown in FIG. 11) provided in parallel from the switching shaft 111 to the flange 112 at the end of the rotary shaft 105, and four vertical oil passages 113. Two sets of shaft openings 114 and 115 that open in the radial direction on the side of the switching shaft 111, and two sets of shaft openings 11
4 and 115, two sets of cylinder openings 116 and 117 on the fixed cylinder 110 side which are alternately opposed to each other. Of these, the first set of cylinder openings 116 on the fixed cylinder 110 side is connected to the oil supply passages R1, R2.
(See FIG. 10), and the second set of cylindrical openings 11
Numeral 7 is connected to oil supply paths R3 and R4, respectively. On the other hand, the four vertical oil passages 113 reaching the flange 112 side are
2 and are connected to respective refueling areas (not shown).

The swing table 102 is moved by a hydraulic cylinder 109.
At the same time, the switching shaft portion 111 on the rotating shaft 105 is alternately switched by a rotation angle of 90 degrees, but in this case, the oil supply passages R1, R2, R3, and R4 can always maintain the communicating state. Incidentally, the rotary lubricating device A on the work mounting device has a slight gap between the fixed cylinder 110 and the switching shaft 111, but here, a seal ring 118 is mounted between each oil passage. Thus, even when high-pressure oil is applied to each oil passage, the sealing performance of each oil passage can be ensured.

[0006]

As described above, in the conventional work mounting apparatus, when there are a plurality of kinds of works to be supplied, the work mounting section dedicated to each work can be used. Many. In many cases, various sensors for detecting necessary data in the assembling work are attached to each of the work placement sections. However, these sensors are problematic because they increase the complexity and complexity of the device, and also increase the cost. Further, when the work mounting device includes the rotary oil supply device A, a rotary seal member is mounted between the oil passages adjacent to each other in order to ensure sealing in the hydraulic circuit. Therefore, as the number of switching oil passages increases, the number of rotary seal members increases,
This becomes the switching resistance, and requires a large switching drive torque during rotation.

As described above, in the rotary lubricating device in the work mounting device, the switching driving torque at the time of switching the oil passage is likely to be large, and the switching operability is reduced, which is a problem. An object of the present invention is to simplify the device, and furthermore,
It is an object of the present invention to provide a work mounting device provided with a rotary oil supply device that can prevent an increase in switching torque even when the number of switching oil passages increases.

[0008]

According to a first aspect of the present invention, there is provided a rotating base having a plurality of workpiece mounting portions pivotally supported in a horizontal direction with respect to a base. A pressing force receiving portion that is disposed opposite to the assembling position on the base and receives the work mounting portion on which the work at the assembling position is mounted on an upward surface, and the plurality of work mounting portions mounted on the pressing force receiving portion. A pressure sensor for detecting a pressing force applied to the work on the work mounting portion at the assembly position by the press-fitting device when one of the portions selectively reaches the assembly position; and a press-fitting process according to the output of the pressure sensor. And control means for judging the suitability of the above.

According to a second aspect of the present invention, a rotary base pivotally supported by a base and formed with a plurality of workpiece mounting portions is integrally formed and a vertical center hole is formed along the rotation center line of the rotary base. And a central fixed base having a vertical central axis protruding from a lower wall surface inserted into the vertical central hole so as to be relatively rotatable with the vertical central hole, and connected to the refueling area of each of the work mounting portions via each distribution path. And a plurality of distribution filler holes formed on the inner peripheral wall surface of the vertical center hole so as to be scattered along the circumferential direction, and a direction formed in the vertical center axis and perpendicular to the rotation center line. A central opening capable of selectively opposing the plurality of distribution oil supply ports, a pair of elastic seal rings mounted on the outer peripheral surface of the vertical central shaft and provided so as to sandwich the central opening, Fitted between the seal ring and the inner peripheral wall of the vertical center hole Both characterized by having a bushing facing portions in the through-hole formed by an elastic body between the central opening and a bushing connecting member mounted to integrally rotatable with the bush with respect to the longitudinal central axis.

[0010]

According to a first aspect of the present invention, a work mounting portion of a rotating base pivotally supported so as to be rotatable in a horizontal direction with respect to a fixed base is selectively disposed at an assembling position. A pressure sensor that detects the pressing force applied to the work on the work placement part at the assembly position is equipped on the opposing pressing force receiving part,
Although this apparatus has a plurality of work placement sections, it is sufficient to provide only a single pressure sensor.

According to a second aspect of the present invention, a built-in rotary lubricating device inserts a vertical center axis of a central fixed base, which is a fixed side, into a vertical center hole of a housing integrated with a rotary base, which is a rotating side, to form a vertical center axis. And a pair of seal rings and an elastic bush are sequentially fitted to the outer periphery of the bush, and they are integrally rotatably attached to each other by a bush coupling member. When the high pressure oil on the central opening side is received, the bush whose inner peripheral surface is pressed against the seal ring of the pair of elastic bodies is displaced in the radially expanding direction and receives vertical pressure when receiving high-pressure oil from the central opening side. The sealing property between the central axis and the inner peripheral surface of the vertical center hole can be enhanced.

[0012]

FIG. 1 shows a work placing apparatus according to one embodiment of the present invention. The work mounting device 2 is provided at an assembly position P of the knuckle bearing press-fitting device 1. here,
A knuckle 3 which is a work is conveyed by a conveyor 4 on an assembly line of a front suspension, and the knuckle 3 is sequentially transferred to the work mounting table 2 manually or by appropriate means. The knuckle bearing press-fitting device 1 employs a configuration in which the work placing device 2 is provided at the center of the base frame B, and the press-fitting device movable section 70 is provided at the upper portion.

The work mounting device 2 includes a base 5 integrated with the base frame B. As shown in FIG. 3, a rotation base 8 is pivotally supported at the center of the base 5 via two journal bearings 6 and one thrust bearing 7 so as to be rotatable in the horizontal direction. The rotating base 8 is provided with five work placing portions 9 on which knuckles 3 having different shapes can be placed in the circumferential direction thereof (see FIG. 2). The knuckle bearing 29 and the like are press-fitted into the knuckle 3 on the placing portion 9. In addition, the work placement device 2 includes a plurality of work placement sections 9 each provided with a refueling area E (see FIGS. 3 and 5). Grease is supplied through the rotary oil supply device 11 on the road R.

Each of the five work mounting portions 9 on the rotating base 8 mounts knuckles 3 having different shapes.
Except for the difference in the dimensions and the like of the receiving portion, they are similarly configured with similar members. Therefore, here, only one work mounting portion 9 will be mainly described.

As shown in FIG. 3, the work mounting portion 9 has a base tube portion 12 which is fitted and fixed in a through hole formed in the rotating base 8, and projects from the center of the lower wall of the base tube portion 12. A central boss 13, an enlarged boss 14 integrally connected to the upper end of the central boss 13, an inner movable cylinder 15 continuously fitted over the central boss 13 and the enlarged boss 14, and an inner movable cylinder 15, a push-up spring 16 that presses the step 151 so that the step 151 abuts on the enlarged diameter boss 14, an outer movable cylinder 17 fitted to be able to move up and down relatively to the base cylinder 12, and an outer movable cylinder And a knuckle supported by the rotating base 8 and supported by the inner movable barrel 15, the outer movable barrel 17 and the enlarged boss 14. Diapin 1 for positioning in rotation direction with respect to 3 And a grease passage 22 that reaches the central boss 13 and the enlarged boss 14 from the grease receiving port 21 at the lower end of the base cylinder portion 12 to reach the annular groove 20 for receiving the oil seal of the enlarged boss 14, and is supported by the rotating base 8. A grease supply pipe 23 and a joint 24 that is connected to the grease receiving port 21 through the pipe and is coupled thereto.

The outer movable cylinder 17 which can move up and down relatively to the base cylinder portion 12 has an opening edge 171 at the upper end thereof covered with the dust cover 2.
7 is set as an inner diameter to which the dust cover 27 can be fitted. The dust cover 2
7 is press-fitted into the distal end portion 301 of the knuckle 3 at the time of press-fitting operation and is integrated. At this time, the outer movable cylinder 17 can relieve the impact at the time of press-fitting by elastic deformation of the short spring 18. A tip portion 301 of the knuckle 3 is provided at an upper end of the inner movable cylinder 15.
Are brought into contact with each other.
Has the same inner diameter as the tip portion 301. As a result, the oil seal 28 fitted in the annular groove 20 at the time of the press-fitting operation moves along the inner wall surface of the inner movable cylinder 15 to the front end portion 301.
Can move smoothly to the side.

In FIG. 3, the tip 30 of the knuckle is shown.
1 has a small-diameter portion 30 for sealing at its end.
2, a bearing receiving portion 303 having an enlarged diameter at the back (upper side in FIG. 3) and a ring groove 304 formed sequentially at the back, and the oil seal 28, the knuckle bearing 29 and the snap ring 30 are fitted therein. It is configured as follows. On the base 5 immediately below the rotating base 8, a pressing force receiving portion 62 that receives the work mounting portion 9 on the upward surface f is provided at a portion facing the assembly position P. This single pressure receiving portion 62 detects a pressing force applied to the knuckle 3 at the assembly position P by the press-fitting device movable portion 70 when one of the plurality of work mounting portions 9 selectively reaches the assembly position P. A single pressure sensor 63 is mounted. The pressure sensor 63 can output the detected pressing force signal to the press-fit control unit 64,
4 judges whether the press-fitting process is appropriate according to the pressing force signal,
If the measured pressing force is not within the set range, a press-fit error is displayed.

As shown in FIG. 3, the grease passage 22 formed in the enlarged diameter boss 14 has a plurality of branch passages 22a on the upper end side.
The openings of the branch passages 22a are distributed so that grease is uniformly supplied to the entire oil supply area E of the oil seal 28 fitted to the oil seal 28. The circular thin plate 141 made of an elastic material connected to the enlarged boss 14 abuts on the end of the knuckle bearing 29 at the time of press-fitting, and at this time, a part of the grease from the branch passage 22a is brought into contact with the end of the circular thin plate 141. It is configured to be guided and supplied to the knuckle bearing 29 side. Diapin 19 is a locking projection 305 of knuckle 3
And is slidably supported by a vertical cylindrical pin guide 31 supported on the rotating base 8, urged upward by a spring 32, and a stopper 311. The maximum amount of protrusion is regulated.

Next, the oil pressure source 10 and the grease supply path R reach the central boss 13 and the enlarged boss 14 from the grease receiving port 21 in the enlarged boss 14 on the rotating base 8, and the refueling area E of the enlarged boss 14. Oil supply device 11 that supplies grease to the machine
Will be described. As shown in FIG.
Reference numeral 1 is provided around a rotation center line L of the rotation base 8. The rotary lubricating device 11 includes a housing 33 as a central protruding member, a central fixed base 36 that protrudes from a lower wall surface a vertical central shaft 35 that is rotatably fitted into a vertical central hole 34 formed in the housing 33, Each distribution path R1, R2, R3, R4, R5 is provided in the refueling area E of the work mounting portion 9.
(See FIG. 5) and a plurality of distribution oil supply ports 37 formed so as to be scattered along the circumferential direction on the inner peripheral wall surface of the vertical center hole 34, and the vertical center of the center fixed base 36. Axis 3
5 and a central opening 3 which is perpendicular to the rotation center line L and selectively opposes the plurality of distribution oil supply ports 37.
8, a pair of seal rings 40 which are fitted in a pair of annular grooves 39 formed in the vertical center shaft 35 and are disposed so as to sandwich the central opening 38; The bush 41 includes a bush 41 fitted to the inner peripheral wall surface of the bush 34 and having a through hole 51 formed in a portion facing the central opening, and a bush coupling member 42 to which the bush 41 is rotatable integrally with the vertical center shaft 35.

As shown in FIGS. 2 and 4, the housing 33 has a substantially regular pentagonal shape in plan view, and is disposed on a plane perpendicular to the rotation center line L, and has five distribution refueling ports 37 in the radial direction of the center line. Is adopted. Here, the five distribution refueling ports 37 are connected to the five rotating supports 8.
The two work mounting portions 9 are connected to the opposite joints 24 via the grease supply pipe 23, respectively. A central fixing base 36 projecting the vertical center axis 35 from the lower wall surface is connected to the base 5 via a bracket (not shown). As shown in FIG. 6, the vertical center shaft 35 projecting downward from the center fixing base 36 has an enlarged diameter portion 351 above its upper end, and a shaft portion 352.
And the lower coupling portion 353 are formed in this order. A central opening 38 that opens in a direction perpendicular to the rotation center line L is formed at the center of the outer peripheral wall of the shaft portion 352, and a pair of annular grooves 39 in which a pair of seal rings 40 are fitted are provided at predetermined upper and lower positions.
Is formed. Here, the central opening 38 is bent upward at the center of the axis, and the upper end opening 43 is connected to a grease supply pipe 45 forming a grease supply path R via a joint 44. The other end of the grease supply pipe 45 is connected to the hydraulic pressure source 10 so as to receive grease from the hydraulic pressure source.

As shown in FIG. 5, a hydraulic circuit having a grease supply path R is a hydraulic source 1 which is a well-known grease pump.
0, a main pipe 46 following the main pipe, a branch pipe 48 continuing from the main pipe via a stop valve 47, a grease quantitative air valve 49 provided on the branch pipe 48 for measuring passage of a fixed amount of grease, and a branch pipe. An automatic flow gun 50 which is provided on 48 and intermittently interrupts the flow of grease;
And a rotary lubrication device 11. Here, the grease quantitative air valve 49 transmits the flow rate signal to the press-fit control unit 6.
4 and the press-fit control unit 64 is configured to output a shutoff signal to the grease quantitative air valve 49 and the automatic flow gun 50 for detecting the quantitative determination.

The resin bush 41 externally fitted to the vertical center shaft 35 is formed of a soft resin such as Teflon, and has a thickness between the vertical center shaft 35 and the inner peripheral wall of the vertical center hole 34. Approximates Here, in particular, the bush 41 is configured so that its upper and lower ends are sandwiched between the upper enlarged-diameter portion 351 and the disc-shaped bush coupling member 42 on the lower coupling portion 353 side, and rotates together with the vertical center shaft 35. In the side wall of the bush 41, the through hole 51 and the central opening 3 at the portion facing the central opening 38.
8 can face each other so as to sequentially communicate with the distribution refueling port 37 when the vertical center shaft 35 rotates about the rotation center line L. At this time, one distribution refueling port 37 opposing the grease from the central opening 38 is provided.
Then, the oil is supplied to the refueling area E of the opposing work mounting section 9 via

At this time, the grease advances from the central opening 38 to the through hole 51 and a part of the grease enters the gap between the bush 41 and the vertical center shaft 35. This promotes the elastic deformation of the pair of seal rings 40 and the bush 41. . Due to this elastic deformation, the joint between the pair of seal rings 40 and the bush 41 is further strengthened. In addition, the bush 41 is elastically deformed in the radially expanding direction, presses against the inner wall surface of the vertical center hole 34, and presses the inner wall surface of the vertical center hole 34. The gap between the outer peripheral surface of the bush 41 and the outer periphery is eliminated, and the sealing performance is ensured. Here, in particular, a pair of annular labyrinth grooves 52 are formed on the outer peripheral surface of the bush 41 at predetermined positions sandwiching the distribution oil supply port 37, and the outer peripheral surface of the bush 41 and the vertical center hole are formed by the action of the grooves. The sealing property with the inner wall surface of 34 is strengthened. As shown in FIGS. 7 and 8, the press-fitting device movable portion 71 of the knuckle bearing press-fitting device 1 is supported on an upper portion of the base frame B. Here, the press-fit movable member 87 that moves up and down by the press-fit device movable portion 71 supports the pivot frame 73 via the switching means 72 on the pivotal support portion 871, and the left and right side portions 872, 8.
73 are provided with stoppers 74 and 75.

The switching means 72 pivotally supports the rotating frame 73 via a fixing pin 76 integrally supported by the pivot 871.
The rotary frame 73 is switched and driven by a hydraulic high loader 77. That is, the rotating frame 73 is equipped with a pair of press-fit blocks 78 and 79 projecting in two directions perpendicular to the center line direction of the fixing pin 76. Each press-fit block includes a push fitting 80 for detecting engagement of the snap ring 30 and a sleeve 81.
Have the same configuration except that the inner and outer diameters are different.
Here, a center hole 83 accommodating the sliding cam 82 driven by the thin cylinder 88 is formed in the direction of the center line L2 of the fixing pin 76, and the center hole 83 of the center hole 83 in the direction of the center line L2 is pushed. A movable pin 84 facing the end of the metal fitting 80 is provided. Here, the press operation information of the press fitting 80 is alternately transmitted to the position sensors 85 and 86 via the movable pin 84 and the slide cam 82 and is input to the press-fit control unit 64.

Here, the switching means 72 is controlled by the press-fitting control unit 64 of the knuckle bearing press-fitting device 1 to determine the type of knuckle that has reached the assembly position P, and to switch one of the press-fitting blocks 78, 79 according to the type. The press-fitting position C1 is selectively switched and held, and the other upper press-fit blocks 78 and 79 are switched and held at the standby position C2. Reference numerals 87 in FIG. 7 denote position sensors, respectively, which are used to determine the type of the press-fit blocks 78, 79 that have reached the standby position C2. A pair of press-fit blocks 78,
Reference numerals 79 each slidably fit the sleeve 81. Each of the sleeves 81 has a tip 811 formed so as to be able to fit inside the upper opening end 305 of the knuckle 3, and a ring guide 8 for guiding the snap ring 30 into the sleeve 81 at the upper end.
12 are formed (see FIG. 8).

Such a knuckle bearing press-fitting device 1
The operation of the work placing device 2 in the inside will be described together with the operation of the knuckle bearing press-fitting device 1. First, when the knuckle 3 as a work is conveyed to the knuckle bearing press-fitting device 1 by the conveyor 4, the operator sets the work mounting portion 9 corresponding to the type of the knuckle at the assembly position P of the knuckle bearing press-fitting device 1. For this purpose, the rotating base 8 is driven.
In this case, the housing 33 rotates about the rotation center line L together with the rotation base 8. At this time, when the projecting piece 60 on the rotating base 8 reaches the proximity switch 61 on the base 5, the fact that the positioning has been performed can be indicated by an indicator light (not shown). When alignment is performed, the bush 41 rotates in the vertical center hole 34 integrally with the vertical center shaft 35. Then, a central opening 38 is provided so as to face one distribution oil supply port 37 communicating with an oil supply area E provided in one of the five work mounting sections 9 supported by the rotating base 8.

When this state is reached, the grease supply passage R is communicated with the central opening 38 of the central fixed base 36,
Also, a grease quantitative air valve 49 for measuring the passage of a predetermined amount of grease and an automatic flow gun 50 for intermittently interrupting the flow of grease are provided in communication. The grease supply path side is held by the press-fit control unit 64 so that the oil supply can be controlled.

After that, the knuckle 3 is placed on the work placing portion 9 at the assembly position P by the conveyor 4 by the operator. In this case, the locking projection 305 of the knuckle 3 is locked by the die pin 19 to restrict the knuckle from shifting. Here, the operator presses the knuckle bearing press-in device 1 into the press-in control section 6.
The knuckle type information is input to 4 using an operation plate (not shown). Then, the control unit selects the press-fitting blocks 78 and 79 according to the type of the knuckle, and switches and sets the press-fitting position to the press-fitting position C1.

After that, the knuckle bearing 29 is loosely fitted to the upper opening end 305 and the dust cover 27 is loosely fitted to the tip portion 301 of the knuckle 3. The sleeve 81 on the press-fit block 78 at the press-fit position C1 is fitted into the open end 305. Thereafter, the snap ring 30 is supplied from the ring guide 812, and a press-fit command is input to the press-fit control unit 64. Then
The press-fitting device movable portion 71 of the knuckle bearing press-fitting device 1 is driven to lower the press-fit block 78, and the knuckle bearing 29 in a loosely fitted state is pressed into the bearing receiving portion 303, and at the same time, the snap ring 30 is fitted into the ring groove 304. Then, the dust cover 27 is fitted to the front end portion 301.
At this time, the tip of the knuckle 301 presses the inner movable cylinder 15 and the dust cover 27 presses the outer movable cylinder 17 downward by the pressing force of the press-fit block 78.

As a result, the knuckle bearing 29 is fitted in the bearing receiving portion 303, the snap ring 30 is fitted in the ring groove 304, and the dust cover 2 is
7 lowers the outer movable barrel 17 and the tip portion 301 of the knuckle pushes up the inner movable barrel 15 against the elastic force of the spring 16 and the short spring 18, respectively. At this time, the action of the push-up spring 16 and the short spring 18 can eliminate excessive pressing force and reduce the impact of the pressing operation. Moreover, the two springs 16, 18
Is displaced by a predetermined amount, the tip 301 of the knuckle descends with respect to the enlarged boss 14, and the tip 3 of the knuckle 3
The oil seal 28 can be fitted on the inner peripheral wall of the oil seal 01. At this time, the press-fit control unit 64 drives the thin cylinder 88, and in conjunction with this, the central pin 84 and the long pin 841 integral with the push fitting 80 operate against the elastic force of each return spring, and the push fitting 80 is actuated downward through the inside of the enlarged snap ring (due to fitting into the ring groove 304). Depending on whether or not this operation can be performed, that is, based on the output change of the position sensors 85 and 86, the press-fit control unit 6
4 can determine whether the snap ring is properly fitted.

Further, the press-fit control section 64 detects the pressing force applied to the knuckle 3 of the work mounting section 9 at the assembly position P according to the input signal of the pressure sensor 63, and sets a pressing force corresponding to the detected pressing signal. If it is within the area, it is sufficient to display the press-fit error if it is not. Thereafter, the press-fit control unit 64
Issues a refueling order. As a result, the automatic flow gun 50 is opened, and when the grease quantitative air valve 49 measures the passage of a certain amount of grease, the grease quantitative air valve 49
Is closed, and a fixed amount of oil is supplied to the oil supply area E of the work mounting portion 9. At this time, the grease proceeds from the central opening 38 to the distribution refueling port 37 through the through hole 51, and at this time, the sealing property between the bush 41 and the vertical center shaft 35 is secured by the elastic deformation of the pair of seal rings 40 and the bush 41. ,
The sealing property between the bush 41 and the inner peripheral wall of the vertical center hole 34 is enhanced by the elastic deformation of the bush 41 and the annular labyrinth groove 52.

Thereafter, the control unit (not shown) of the knuckle bearing press-in device 1 returns the press-in block 78 together with the press-in movable member 87 to the standby position (the position shown in FIG. 1) and waits for the start of the next press-in operation cycle. The knuckle in which the knuckle bearing 29, the snap ring 30, and the dust cover 27 are assembled is returned to the conveyor, and is sent out for the next assembling process.

[0033]

As described above, according to the first aspect, the pressure sensor for detecting the pressing force applied to the work on the pressing force receiving portion provided on the fixed base and opposed to the assembling position is provided. Equipped with this equipment, this equipment can selectively install a plurality of work placement parts facing a single pressure sensor at the assembly position, detect the pressing force applied to the work at the time of press-fitting, and only provide a single pressure sensor And the apparatus can be simplified and the cost can be reduced.

According to the second aspect of the present invention, the built-in rotary lubricating device sequentially fits the pair of seal rings and the elastic bushings on the longitudinal center axis of the center fixed base, which is the fixed side, and moves the pair of seal rings and the elastic side bush. When the high-pressure oil is received at the center opening side of the vertical center shaft, the high-pressure oil is sent from the distribution-side oil supply port on the rotation side to the lubrication area of the work mounting portion through the through hole. As a result, the bush in which the inner peripheral surface is pressed against the pair of elastic seal rings secures the sealing property between the vertical central axis and the bush, and the vertical central axis and the vertical central hole are displaced in the radial direction of the bush. The sealing property between the inner peripheral surfaces can be enhanced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a work mounting device according to the present invention.

FIG. 2 is a plan view of a main part of the work mounting device of FIG. 1;

FIG. 3 is an enlarged side sectional view of a main part of the work mounting device of FIG. 1;

FIG. 4 is an enlarged plan view of an essential part of a rotating base of the work mounting device of FIG. 1;

FIG. 5 is a hydraulic circuit diagram of the work placing device of FIG. 1;

FIG. 6 is an enlarged partial cross-sectional view of a rotary oil supply device of the work mounting device of FIG. 1;

FIG. 7 is an enlarged side sectional view of a press-fitting device movable portion of the work placing device of FIG. 1;

8 is an enlarged front sectional view of a movable portion of the press-fitting device of the work placing device of FIG. 1;

FIG. 9 is an enlarged plan view of a ring guide of the press-fitting device movable section in FIG.

FIG. 10 is a schematic side view of a conventional work mounting device.

FIG. 11 is an enlarged partial cross-sectional view of a conventional oil supply device in a conventional work mounting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Knuckle 3 Rotation base 4 Vertical center hole 9 Work placement part 33 Housing 34 Vertical center axis 36 Central fixed base 37 Distribution oil supply port 38 Center opening 39 Annular groove 40 Seal ring 41 Bush 42 Seal rotating plate 51 Through hole 62 Pressing force receiving part 63 Pressure sensor f Upward surface E Refueling area R1 Distribution path

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kunihiro Irie 10-3-10 Nakaune, Kurashiki City, Okayama Prefecture, Sanyo Giken Co., Ltd. (56) References JP-A-2-88120 (JP, A) JP Hei 6-55374 (JP, A) Actually open Hei 2-63934 (JP, U) (58) Fields studied (Int. Cl. ⁶ , DB name) B23P 19/02

Claims (2)

(57) [Claims] A rotating base having a plurality of work mounting portions pivotally supported on the base so as to be rotatable in a horizontal direction, and a work at the assembling position which is provided opposite to an assembling position on the base. A pressing force receiving portion for receiving the mounted work mounting portion with an upward surface, and the press-fitting device when one of the plurality of work mounting portions mounted on the pressing force receiving portion selectively reaches the assembling position. A work placement device comprising: a pressure sensor for detecting a pressing force applied to a work on a work placement portion at the assembly position; and control means for judging whether or not the press-fitting process is appropriate according to an output of the pressure sensor. 2. A rotary base having a plurality of workpiece mounting portions pivotally supported on a base so as to be rotatable in a horizontal direction, and a rotary base integrally formed with the rotary base, A housing in which a vertical center hole is formed along the rotation center line, a center fixed base in which a vertical center shaft inserted into the vertical center hole so as to be relatively rotatable protrudes from a lower wall surface, and A plurality of distribution oil supply ports which are communicated with the oil supply area via the respective distribution passages and are formed so as to be scattered along the circumferential direction on the inner peripheral wall surface of the vertical center hole, and formed on the vertical center axis; A central opening, which is perpendicular to the rotation center line and can selectively oppose the plurality of distribution refueling ports, and a pair mounted on the outer peripheral surface of the vertical central shaft and arranged to sandwich the central opening. An elastic seal ring, the pair of seal rings and the vertical An elastic bushing fitted between the inner peripheral wall surfaces of the core hole and having a through hole formed in a portion facing the central opening, and a bush connection for attaching the bush so as to be integrally rotatable with respect to the vertical center axis; A work placement device having a member.