JPH11170128A - Automatic assembly device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic assembly device which can automatically assemble a gear pump without the necessity of a manual-work of a worker so as to enhance the productivity. SOLUTION: An automatic assembly device comprises a first supply part 24 for supplying a balancer shaft to an assembly station 23 along a workpiece conveyer 20, a second supply part 25 for supplying a drive gear, a driven gear and a pump cover, and a robot 28 for gripping a balancer shaft, a drive gear, a driven gear and an oil pump cover, which are picked up from the first and second supply part, and supplying them to a cylinder block. The drive gear and the driven gear supplied by the robot 28 are adjusted in phase by means of gear phase adjusting mechanisms 95a, 65b before they are assembled into a pump casing, and then, they are assembled in the pump casing while they are pressed. Thereafter, they are fastened by a bolt to the balancer shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic assembling apparatus for assembling a drive gear and a driven gear constituting an oil pump to a cylinder block of an automobile engine.

[0002]

2. Description of the Related Art An automobile engine equipped with a balancer shaft for a cylinder block is shown in FIG.
And FIG. In the figure, reference numeral 1 denotes a cylinder block. Both ends of a balancer shaft 2 are rotatably supported on the cylinder block 1, and a gear is fixed to one end of the balancer shaft 2 by chamfering a part of the outer peripheral surface to a flat surface. The hole 3a of the driven gear 3 for the oil pump is formed in a shape similar to the gear fixing portion 2a, and the hole 3a is formed in the gear fixing portion 2a.
It is fixed by bolts 4 in a state fitted to a.

The driven gear 3 is meshed with a drive gear 5 having a shaft for an oil pump.
The drive gear 5 is covered with an oil pump cover 7 fixed to the cylinder block 1 by a plurality of bolts 8 via a gasket 6 to form an oil pump 9. That is, the oil pump cover 7 is provided with a fitting hole 7a that fits into the shaft portion 5a of the drive gear 5, and a plurality of bolt holes 7b. The bolts 8 are inserted through the bolt holes 7b and fixed to the cylinder block 1. You.

[0004] At the other end of the balancer shaft 2, an engagement portion 2c is provided at the end, and a balancer cover 11 is provided which is joined to the cylinder block 1 via a gasket 10. The cylinder block 1 is fixed to the cover mounting portion 1 a by a plurality of bolts 12. Reference numeral 13 denotes a front case that covers the oil pump cover 7, and reference numeral 14 denotes an oil pan fixed to the cylinder block 1.

[0005]

In the assembling process of an automobile engine, a driven gear 3 is assembled to an end of a balancer shaft 2 incorporated in a cylinder block 1 by a bolt 4, and a driven gear 5 is meshed with the driven gear 3. In the assembling operation of the oil pump 9, the driven gear 3 and the drive gear 5 were separately assembled.

However, since the gap between the pump casing 9a provided integrally with the cylinder block 1 and the driven gear 3 and the drive gear 5 is only allowed to be extremely small, the oil pump 9 has a smaller size than the driven gear 3 incorporated previously. The drive gear 5 and the pump casing 9
The work of incorporating into a was very difficult and spent a lot of time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to automatically operate a driven gear and a drive gear together with a pump casing provided in a cylinder block in a meshed state. It is an object of the present invention to provide an automatic assembling apparatus that can be assembled as desired and can improve productivity.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to supply a balancer shaft to a cylinder block at an assembling station of a work transport conveyor for transporting the cylinder block, and to provide a drive gear,
An automatic assembling device for assembling a driven gear and an oil pump cover with bolts, a first supply unit that supplies the balancer shaft, a second supply unit that supplies the drive gear, the driven gear, and the oil pump cover; A shaft phasing mechanism capable of gripping and rotating the balancer shaft supplied to the cylinder block, and gripping and holding the balancer shaft, drive gear, driven gear, and oil pump cover from the first and second supply units, respectively. A robot that distributes and supplies the cylinder block and the assembling station, a gear phase matching mechanism that matches the phases of the supplied drive gear and driven gear to maintain the meshing state, and a phase-matched drive gear and driven gear. At the same time, supply the cylinder block A gear supply mechanism that cooperates with the shift phase matching mechanism to match the phases of the balancer shaft and the driven gear, and supplies the oil pump cover supplied by the robot to the cylinder block on which the drive gear and the driven gear are set. A cover supply mechanism and a tightening mechanism for holding the bolt, tightening the bolt to tighten and fix the driven gear to the balancer shaft, and fixing the oil pump cover to the cylinder block.

According to the above construction, before assembling the drive gear and the driven gear into the cylinder block, the phases of the drive gear and the driven gear can be matched, and the two gears can be simultaneously incorporated into the cylinder block while being pressed. There is a gap for the rush, and the drive gear and driven gear can be easily assembled to the cylinder block.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an automatic assembling apparatus for automatically assembling an oil pump 9 and a balancer cover 11 to a cylinder block 1. First, a schematic configuration of the present apparatus will be described. A pump mounting device 21 is provided, and a balancer cover mounting device 22 is provided on the right side in the transport direction.

The work transport conveyor 20 transports the cylinder block 1 in a state where the cylinder block 1 is placed in an upside-down direction, and an assembling station 23 is provided in the middle of the transport.
, The oil pump 9 and the balancer cover 11 are assembled to the cylinder block 1.

The oil pump assembling device 21 includes a first component supply conveyor 24 as a first supply unit on which the balancer shaft 2 is mounted, a driven gear 3 and a drive gear 5.
Further, a second component supply conveyor 25 as a second supply section on which the oil pump cover 7 is placed and ball feeders 26 and 27 for supplying the bolts 4 and 8 are provided. Further, a robot 28 is provided between the first and second component supply conveyors 24 and 25, and supplies the balancer shaft 2, the driven gear 3, the drive gear 5, and the oil pump cover 7 to the assembling station 23. ing.

A gasket mounting table 29 for mounting the gasket 10 and a balancer cover mounting table 30 for mounting the balancer cover 11 are provided adjacent to the work transfer conveyor 20. A guide rail 31 is provided above the mounting tables 29 and 30, and a moving block 32 is provided on the guide rail 31 so as to freely reciprocate. The moving block 32 is provided with a component supply hand 34 having a suction cup 33 so as to be able to move up and down so as to supply the gasket 10 and the balancer cover 11 to the component temporary assembling table 35.

The bolt 12 is located on the side adjacent to the component temporary mounting table 35.
A ball feeder 36 serving as a bolt supply unit for supplying the bolts and a temporary bolt holder 37 are provided. The ball feeder 36 and the bolt temporary placing table 37 are connected by a plurality of tubes 38, and the bolts 12 are fed to the bolt temporary placing table 37 by air. A first holding portion 39 for holding the balancer cover 11 and the gasket 10 in an overlapping state on the component temporary assembling table 35 and a plurality of bolts 12 transferred from the temporary bolt mounting table 37 are in an upright state. The second holding part 40 held by the above is provided adjacently.

A guide rail 41 extending in the direction of the workpiece transfer conveyor 20 is provided above the component temporary assembling table 35. The guide rail 41 includes a plurality of balancer covers 11 and gaskets 10 of the first holding portion 39. Bolt 1
2 is a second holding part 4 which is held in an upright position.
A transfer mechanism 42 is provided for transferring the image data to zero. The transfer mechanism 42 includes a moving block 43 that moves along the guide rail 41 and a transfer hand mechanism 44 that is provided on the moving block 43 so as to be able to move up and down.

The guide rail 41 has an end extending to the vicinity of the work transport conveyor 20, and a base 45 is provided below the guide rail 41. A rail 46 is provided on the upper surface of the base 45 in a direction perpendicular to the work transport conveyor 20.
Is provided with a movable table 47 which can move forward and backward.

A support table 48 is provided above the moving table 47. The support table 48 is provided with a turning plate 50 which is rotatable up and down around a hinge pin 49 as a fulcrum. The rotating plate 50 is rotatable from a horizontal state to a vertical state by air cylinders 51 provided on both sides,
The rotating plate 50 includes a balancer cover 11 and a gasket 1.
A third holding portion 53 is provided for holding a balancer cover assembly 52 whose 0 is assembled by a plurality of bolts 12.

The upper portion of the moving table 47 is engaged with the engaging portion 2c at the end of the balancer shaft 2 set in the cylinder block 1, and the phase of the balancer shaft 2 is adjusted by rotating the balancer shaft 2 to adjust the phase of the balancer shaft 2. A mechanism 54 is mounted.

Next, the oil pump assembling apparatus 21 which is a main part of the present invention will be described. As shown in FIG. 2A, the balancer shaft 2 is disposed on the first component supply conveyor 24 in a state of being stored in the container 55. As shown in FIGS. 2B and 2C, two sets of the driven gear 3, the drive gear 5, and the oil pump cover 7 are placed on the pallet 56 of the second component supply conveyor 25. Hole 3a of drive gear 5
Are set in a two-tiered state fitted to the shaft portion 5a.

Further, as shown in FIG. 1, the robot 2 installed between the first and second component supply conveyors 24, 25
The turning and rotating arm 57 of FIG. 8 is provided with a first hand 58 for gripping the balancer shaft 2 and a second hand 59 for gripping the driven gear 3, the drive gear 5 and the oil pump cover 7.

As shown in FIGS. 3 (a) and 3 (b), the second hand 59 has an outer diameter hand function for simultaneously holding the driven gear 3 and the drive gear 5 which are two-stage stacked, and a fitting of the oil pump cover 7. It has an inner diameter hand function of being inserted into the hole 7a and gripped. That is, the second hand 59 is provided with a pair of gripping pieces 61 that are opened and closed by the driving unit 60, can grip the drive gear 5 from the outside at the distal end side of the pair of gripping pieces 61, and grip the driven gear 3 at the base end side. it can. Also,
A protrusion 61 is provided on the outer surface of the pair of gripping pieces 61 at the distal end.
a, and the projection 61 a is
Of the oil pump cover 7
Can be reliably held without dropping.

Next, the peripheral portion of the assembling station 23 of the work transfer conveyor 20 will be schematically described with reference to FIG. 1. The side of the work transfer conveyor 20 has guide rails along the running direction of the work transfer conveyor 20. A support table 63 is movably provided on the guide rail 62. A base 64 is fixed to the support table 63 so as to be spaced apart from the upper surface of the work transport conveyor 20, and a pair of gear phase matching mechanisms 65a and 65b of different models are mounted on the base 64.

Further, the assembling station 23 is provided with a stand 66 projecting above the work transfer conveyor 20, and this stand 66 has a gear phase matching mechanism 65a, 65b.
Gear supply mechanism 6 for supplying upper driven gear 3 and drive gear 5 to pump casing 9a of cylinder block 1
And a bolt supply mechanism 6 that supplies the bolts 4 and 8 to the tightening mechanism 68.
9 are provided.

The bolt supply mechanism 69 includes ball feeders 26, 27 for supplying the bolts 4 and 8, and tubes 26a, 2
7a and a bolt 4 which is pressure-fed by air.
And 8 are provided with a bolt gripping portion 69a for gripping the nut runner to be described later. The support table 63 is provided with a cover supply mechanism 70 for supplying the oil pump cover 7 to the pump casing 9a of the cylinder block 1.

Next, a detailed description will be given of the structure of each part described above. FIGS. 4A and 4B show the gear phase matching mechanisms 65a and 65a.
5b. Since the gear phase matching mechanisms 65a and 65b have the same structure, one of them will be described. The air cylinder 72 is fixed to the upper part of the support table 64 by the bracket 71. A slide rod 73 is provided on the air cylinder 72 so as to be able to advance and retreat, and a gear mounting table 74 is provided at the tip of the slide rod 73.

The gear mounting table 74 is integrally provided with a rising portion 76 which comes into contact with the teeth of the driven gear 3 and the drive gear 5 on the outer side of a mounting surface 75 on which the driven gear 3 and the drive gear 5 are mounted side by side. Have been. In the vicinity of the mounting surface 75 of the gear mounting table 74, a pair of rotating claws 78 that are rotatable around a pivot pin 77 as a fulcrum are provided. Pressing portions 78a are provided at the distal ends of the pair of rotating claws 78 to press the respective teeth of the driven gear 3 and the drive gear 5 against the rising portions 76, and between the base ends, the pressing of the pair of rotating claws 78 is performed. Part 78
A spring 79 is provided to urge in a direction to widen the gap a.

Further, an arcuate surface 78b is formed on the opposing surfaces of the pair of rotating claws 78, and a pressing roller 81 which can be advanced and retracted by a compact cylinder 80 is interposed between the arcuate surfaces 78b. The pair of turning claws 78 can be turned by the forward and backward movement. By rotating the pair of rotating claws 78, the driven gear 3 and the drive gear 5 mounted on the mounting surface 75 of the gear mounting table 74 can be separated from each other without meshing with each other. The gear mounting table 74 on which the driven gear 3 and the drive gear 5 are mounted can be positioned at the transfer position 82 by the air cylinder 72.

In the transfer position 82, the gear mounting table 74
A gear phase matching drive mechanism 83 shown in FIG. That is, the gantry 66 is provided with a guide rail 85 in the horizontal direction, and the guide rail 85 is provided with a moving block 87 that is moved by an air cylinder 86. The moving block 87 is provided with an air cylinder 88 in the vertical direction, and the elevating rod 89 of the air cylinder 88 is provided with an elevating member 90.

The elevating member 90 has a bracket 9 in the horizontal direction.
The bracket 91 has first and second shafts 92 and 93 rotatably supported vertically on the bracket 91.
The upper ends of the first and second shafts 92 and 93 protrude above the bracket 91, and driven gears 94 and 95 that mesh with each other are fitted to the protruded portions. Drive gear 9 fitted to rotating shaft 97
8 is engaged.

Ball spline shafts 99, 100 are inserted into the first and second shafts 92, 93, and are respectively urged downward by springs (not shown). The tip of the ball spline shaft 99 is provided with an engaging member 103 which engages with the hole 3a of the driven gear 3 placed on the gear placing table 74. The tip of the ball spline shaft 100 is placed on the gear placing table 74. An engaging tool 104 is provided for engaging with the shaft 5a of the drive gear 5 placed. Then, the driven gear 3 and the drive gear 5 mounted on the gear mounting table 74 are rotated, and the driven gear 3 and the drive gear 5 are engaged when the phases of the gears match each other.

FIGS. 6 to 8 show a gear supply mechanism 67. A pivot shaft 110 is provided on the top of the gantry 66, and an inverted L-shaped rotation support arm 111 is turned around the pivot shaft 110. It is movably supported by a shaft, and is connected to a slide rod 112 of an air cylinder (not shown) so that it can rotate vertically by 90 °.

The rotation support arm 111 has an air cylinder 1
13 is provided in a vertical state.
A bracket 115 is attached to the thirteen slide rods 114. The guide pipe 1 is attached to the bracket 115.
The guide pipe 116 is fixed in a vertical state, the shaft 117 of the guide pipe 116 is inserted therein, and the holding pipe 118 is fitted outside.

The shaft 1 is provided inside the guide pipe 116.
A spring 119 for urging the pressing pipe 17 downward is provided, and a spring 119 for urging the holding pipe 118 downward is provided outside the guide pipe 116. And
The tip of the shaft 117 is inserted into the hole 3a of the driven gear 3, and the tip of the holding pipe 118 is
Is in contact with the outer peripheral end face. Further, the bracket 115
On the lower side, a compact cylinder 120 is attached. A slide rod 121 is provided with a projection 118 a provided on the outer wall of the holding pipe 118 and a hook 122 which is engaged with the sliding rod 121. 11
8 can be raised.

The guide pipe 1 is attached to the bracket 115.
A rotary shaft 123 is provided in the vertical direction adjacent to the rotary shaft 16, and an intermediate portion of a rotary lever 124 is rotatably supported on the rotary shaft 123. One end of the rotating lever 124 is connected to a compact cylinder 125, and the other end is provided with a vertical socket 126. Socket 126
Has a grip portion 127 for gripping the shaft portion 5a of the drive gear 5.
Is provided.

The drive gear 5 is pressed against the driven gear 3 supported on the shaft 117 by rotating the rotation lever 124 about the rotation shaft 123 by the compact cylinder 125, and the driven gear 3 and the drive gear 5 mesh. Gear holding mechanism 1 for holding in state
28.

FIG. 9 shows the tightening mechanism 68. The moving table 63 is provided with a support member 130 projecting in the vertical direction. The support member 130 is provided with a nut runner 132 which can be advanced and retracted with respect to the cylinder block 1 by an air cylinder 131. Is provided. A tip end of the nut runner 132 has a cap nut 133 facing the driven gear 3 set in the pump casing of the cylinder block 1 and a pressing pin 13 which is in contact with the end of the shaft 5a of the drive gear 5.
4 and a spring 1 for elastically pressing the pressing pin 134
35, and the drive gear 5 is pressed against the pump casing.

FIG. 10 shows a cover supply mechanism 70. A rotating arm 141 is provided on the side of the work transport conveyor 20 so as to be rotatable up and down around a rotating shaft 140.
The turning arm 141 is turned by 90 ° by an air cylinder 143 rotatably supported on a pivot pin 142 as a fulcrum.

The pivot arm 141 is provided with a bracket 144, and the bracket 144
5 are attached. A mounting plate 146 is fixed to a rod (not shown) of the air cylinder 145, and an outer cylinder 147 is provided at the center of the mounting plate 146. An inner cylinder 148 is inserted into the outer cylinder 147, and an inner cylinder 148 is inserted. Is urged by a spring 149 in a protruding direction. A pin 150 is inserted inside the inner cylinder 148, and the pin 150 is urged by a spring 151 in a protruding direction.

Pin mounting shafts 152 are mounted on both sides of the mounting plate 146, and positioning pins 154 urged in a projecting direction by a spring 153 are provided at the distal ends of the pin mounting shafts 152.

The inner cylinder 148 is inserted into the fitting hole 7 a of the oil pump cover 7, the positioning pin 154 is inserted into the bolt hole 7 b of the oil pump cover 7, and the rotating arm 141 is turned 90 ° by the air cylinder 143. By rotating, the oil pump cover 7 is supplied to the cylinder block 1.

Next, the operation of assembling the driven gear 3, the drive gear 5, and the oil pump cover 7 to the pump casing 9a on the side wall of the cylinder block 1 by the automatic assembling apparatus configured as described above will be described.

When the cylinder block 1 is set in the assembly station 23 by the work transfer conveyor 20, the balancer shaft 2 is gripped from the first component supply conveyor 24 by the first hand 58 of the robot 28,
Supply to cylinder block 1. Work transfer conveyor 2
The shaft phase matching mechanism 54 is on standby on the side opposite to the zero, and the supplied balancer shaft 2 is held by the shaft phase matching mechanism 54.

Next, the driven gear 3 and the drive gear 5 are gripped from the second component supply conveyor 25 by the second hand 59 of the robot 28, and the gear phase matching mechanism 65 is held.
a, 65b to the oil pump cover 7
And supply it to the cover supply mechanism 70.

At this time, the hole 3a of the driven gear 3 is set in the pallet 56 of the second component supply conveyor 25 in a two-stage overlapping state in which the hole 3a is fitted to the shaft portion 5a of the drive gear 5. 3 and the drive gear 5 are simultaneously held. That is, the drive gear 5 is gripped from the outside by the tip side of the pair of gripping pieces 61 of the second hand 59,
By holding the driven gear 3 on the base end side, the gear phase matching mechanism 6
5a, and the gear mounting table 7 of the gear phasing mechanism 65a.
4, the driven gear 3 and the drive gear 5 are placed side by side.

The gear mounting table 74 is provided with a pair of rotating claws 78, and the pressing portions 78a of the pair of rotating claws 78 press the respective tooth portions of the driven gear 3 and the drive gear 5 against the rising portion 76. The teeth of the driven gear 3 and the drive gear 5 are maintained at a constant interval without meshing. Next, the air cylinder 72 operates and the driven gear 3
And the gear mounting table 74 on which the drive gear 5 is mounted moves forward and is positioned at the delivery position 82.

A gear phase matching drive mechanism 83 is provided at the transfer position 82 so as to face the gear position. When the gear mounting table 74 on which the driven gear 3 and the drive gear 5 are mounted is positioned at the transfer position 82, the air cylinder 88 is operated. As a result, the elevating member 90 descends. And the elevating member 90
The ball spline shafts 99 and 100 provided on the gear spline shaft 99 are lowered, and the engaging tool 103 at the tip of the ball spline shaft 99 is engaged with the hole 3a of the driven gear 3 mounted on the gear mounting table 74, and the ball spline shaft 100 Engaging device 1 at the tip
04 engages with the shaft 5a of the drive gear 5 mounted on the gear mounting table 74. Then, when the motor 96 operates and the drive gear 98 fitted on the rotating shaft 97 rotates, the rotation is transmitted to the driven gears 94 and 95 that mesh with each other, and the driven gear 3 and the drive gear 3 mounted on the gear mounting table 74 are driven. When the gear 5 rotates and the phases of the gears match each other, the driven gear 3 and the drive gear 5 mesh with each other.

Next, the air cylinder 1 of the gear supply mechanism 67
13, the bracket 115 descends, and the shaft 1
The distal end of the driven gear 3 is inserted into the hole 3 a of the driven gear 3, and the distal end of the holding pipe 118 contacts the outer peripheral end surface of the driven gear 3. The grip 127 of the socket 126 grips the shaft 5 a of the drive gear 5.

In this state, when the compact cylinder 125 operates and the rotating lever 124 rotates, the socket 12
6 is pressed against the driven gear 3 supported by the shaft 117,
The driven gear 3 and the drive gear 5 are held in a meshed state.

Next, when the rotation support arm 111 is displaced downward by 90 ° about the pivot shaft 110 as a fulcrum by the air cylinder, the driven gear 3 and the drive gear 5 held by the gear supply mechanism 67 are connected to the cylinder block 1. It faces the pump casing 9a. Therefore, the air cylinder 113
When the bracket 115 is moved forward, the driven gear 3 and the drive gear 5 which are in the meshing state and pressed by the compact cylinder 125 are supplied to the pump casing 9a.

At this time, the hole 3a of the driven gear 3 faces the end 2a of the balancer shaft 2 in the cylinder block 1, but if the phase of the end 2a of the balancer shaft 2 and the hole 3a of the driven gear 3 do not match, the fitting is performed. Although not matched, the balancer shaft 2 is held by the shaft phasing mechanism 54, and when the balancer shaft 2 is rotated by the shaft phasing mechanism 54, the hole 3a of the driven gear 3 and the end 2a of the balancer shaft 2 are in phase. ,
The hole 3 of the driven gear 3 is formed in the end 2a of the balancer shaft 2.
a is fitted, and the driven gear 3 and the drive gear 5 are completely accommodated in the pump casing 9.

When the supply of the driven gear 3 and the drive gear 5 to the pump casing 9 is completed, the bracket 115 is retracted by the air cylinder 113, and the rotation support arm 111 is moved upward by the air cylinder about the pivot 110. The gear supply mechanism 67 rotates and retracts.

On the other hand, the bolt 4 is pressure-fed to the bolt supply mechanism 69 from the ball feeder 26 via a tube 26a by air, and is supplied to the cap nut 133 at the tip end of the nut runner 132 by a bolt gripper 69a that grips the bolt 4. The bolt 4 is supplied and the air cylinder 1
When the nut runner 132 advances by 31, the bolt 4 in the cap nut 133 faces the bolt hole 2 b of the balancer shaft 2, and the pressing pin 134 presses the shaft 5 a of the drive gear 5 against the pump casing 9. In this state, the bolt 4 is tightened to the balancer shaft 2 by the nut runner 132, and the driven gear 3 is tightened and fixed to the end 2a of the balancer shaft 2.

Next, after the air cylinder 131 is retracted,
The air cylinder 143 of the cover supply mechanism 70 operates to rotate the rotating arm 141 upward by 90 °. Then, the oil pump cover 7 held by the inner cylinder 148 and the positioning pins 154 faces the pump casing 9 of the cylinder block 1. Then, when the inner cylinder 148 and the positioning pin 154 move forward by the operation of the air cylinder 145,
The hole 7a of the oil pump cover 7 is fitted into the shaft 5a of the drive gear 5, the bolt hole faces the bolt hole provided on the side wall of the cylinder block 1, and the driven gear 3 and the drive gear 5 housed in the pump casing 9 are provided. Is covered by an oil pump cover 7.

When the supply of the oil pump cover 7 is completed as described above, the operation of the air cylinder 145 causes the inner cylinder 1 to operate.
After the 48 and the positioning pin 154 are retracted, the air cylinder 143 is actuated, the rotating arm 141 is rotated downward by 90 °, and the cover supply mechanism 70 is retracted.

On the other hand, the bolt 8 is pressure-fed to the bolt supply mechanism 69 from the ball feeder 27 via a tube 27 a by air, and is supplied to the cap nut 133 at the tip of the nut runner 132 by a bolt gripper 69 a that grips the bolt 8. The bolt 8 is supplied and the air cylinder 1
When the nut runner 132 advances by 31, the bolt 8 in the cap nut 133 faces the bolt hole 7 b of the oil pump cover 7, and the oil pump cover 7 is fastened and fixed to the side wall of the cylinder block 1 by the bolt 8.

When the bolt 8 is tightened by the nut runner 132 and the assembly of the oil pump cover 7 is completed, the work transport conveyor 20 moves by one pitch, and the next cylinder block 1 on the work transport conveyor 20 is positioned at the assembly position 23. Then, the same operation is repeated to assemble the oil pump 9.

[0057]

As described above, according to the present invention, the driven gear and the drive gear can be automatically assembled together with the driven gear and the drive gear engaged with the pump casing provided on the cylinder block. The assembly can be performed automatically without the help of an operator, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an entire automatic assembling apparatus showing a first embodiment of the present invention.

FIG. 2 is a plan view of a balancer shaft supply unit, a drive gear, and a driven gear supply unit of the embodiment.

3A and 3B show the same embodiment, wherein FIG. 3A is a side view of a hand holding a drive gear and a driven gear, and FIG. 3B is a side view of the hand holding an oil pump cover.

FIG. 4 shows the gear phase matching mechanism of the embodiment, and (a)
Is a side view, and (b) is a plan view.

FIG. 5 is a side view of the gear phasing drive mechanism of the embodiment.

FIG. 6 is a side view of the gear supply mechanism of the embodiment.

FIG. 7 is an exemplary plan view of the gear holding unit according to the embodiment;

FIG. 8 is a vertical side view of the gear grip portion of the embodiment.

FIG. 9 is a side view of the fastening mechanism of the embodiment with a part cut away;

FIG. 10 is a side view of the cover supply mechanism of the embodiment with a part cut away.

FIG. 11 is an exploded perspective view of a cylinder block, a balancer shaft, an oil pump, and a balancer cover.

FIG. 12 is a vertical sectional side view showing a state where a balancer shaft, an oil pump, and a balancer cover are assembled to a cylinder block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cylinder block 2 ... Balancer shaft 3 ... Driven gear 4 ... Bolt 5 ... Drive gear 20 ... Work transfer conveyor 24 ... First supply part 25 ... Second supply part 54 ... Shaft phase matching mechanism 65a, 65b ... Gear phase matching Mechanism 67: Gear supply mechanism 68: Tightening mechanism 70: Cover supply mechanism

Claims (1)

[Claims] An assembly station is provided on a work transport conveyor for transporting a cylinder block. The assembly station supplies a balancer shaft to the cylinder block and automatically assembles a drive gear, a driven gear, and an oil pump cover with bolts. In the assembling apparatus, a first supply unit that is installed at the assembling station and supplies the balancer shaft, a second supply unit that supplies the drive gear, the driven gear, and the oil pump cover, and is supplied to the cylinder block. A shaft phase matching mechanism that can hold and rotate the balancer shaft, and a cylinder block and an assembly station that hold the balancer shaft, drive gear, driven gear, and oil pump cover from the first and second supply units, respectively. To A robot that distributes and supplies, a gear phase matching mechanism that matches the phases of the drive gear and the driven gear supplied by the robot to maintain the meshing state, and a drive gear and a driven gear that are phase-matched by the gear phase matching mechanism. At the same time, a gear supply mechanism that supplies the cylinder block with the phase of the balancer shaft and the driven gear and fits in cooperation with the shaft phase matching mechanism, and a drive gear and a driven gear that feeds the oil pump cover supplied by the robot. A cover supply mechanism for supplying to the set cylinder block, and a tightening mechanism for holding the bolt, tightening the bolt to tighten and fix the driven gear to the balancer shaft, and fixing the oil pump cover to the cylinder block. Did Automatic assembly equipment and features.