JPH0288133A - Assembly device for crankshaft - Google Patents

Abstract

PURPOSE:To assemble a thrust metal together with a crankshaft by providing a metal holding means holding the thrust metal at the specified position of a crankshaft and a pressing means pressing the thrust metal to a normal position on a movable member. CONSTITUTION:When a thrust metal 8 is transferred, a metal holding mechanism 45 and metal pressing mechanism 46 are driven to the using position by a movement driving mechanism 47 and held at the metal holding position of a crankshaft 5 by the action point part 56b of a clamp lever 56. The thrust metal 8 is assembled to a cylinder block 3 at its part excepting the part held by the clamp lever 56, and is assembled in a normal position while rotating in clockwise direction as shown by a virtual line, by operating the metal pressing mechanism 46 by releasing the clamp of the thrust metal 8 after assembling the crankshaft 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a crankshaft assembly device, and more particularly to an apparatus for assembling a thrust metal together with a crankshaft.

[Prior art]

Generally, a thrust metal for axially positioning the crankshaft is assembled at a predetermined position between the cylinder block and the crankshaft.

Normally, the above-mentioned thrust metal is assembled by a metal assembling device (see Japanese Patent Laid-Open No. 130143/1983) that is independent of the crankshaft assembling device after the crankshaft is assembled to the cylinder block.

[Problems to be Solved by the Invention] Conventionally, the metal assembling device described above was provided separately from the assembling device for assembling the crankshaft, so the thrust metal assembling process was performed separately from the crankshaft assembly process. There are problems in that the structure of the assembly device 4 becomes complicated and the manufacturing cost increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a crankshaft assembling device for assembling a thrust metal together with a crankshaft.

[Means to solve the problem]

A crankshaft assembling device according to the present invention is a crankshaft assembling device that assembles the crankshaft at a predetermined position on a cylinder block by holding the crankshaft with a shaft holding means provided on a movable member for assembling and transferring.
The movable member is provided with a metal holding means for holding the thrust metal at a predetermined position of the crankshaft held by the shaft holding means, and a pressing means for pressing the thrust metal into a proper position after the crankshaft is assembled. It is something.

[Effect]

In the crankshaft assembly device according to the present invention, the crankshaft is assembled to the cylinder block while being held by the shaft holding means with the thrust metal being held at a predetermined position on the crankshaft by the metal holding means. When the crankshaft is assembled, the parts of the thrust metal other than the part held by the metal holding means are attached to the cylinder block along with the crankshaft, and after the crankshaft is assembled, the thrust metal is pressed by the pressing means and the metal The part held by the holding means is inserted between the crankshaft and the cylinder block and assembled in the correct position.

〔Effect of the invention〕

According to the crankshaft assembling device of the present invention, as explained above, by providing the metal holding means and the pressing means in the crankshaft assembling device, the thrust metal is attached to the cylinder block at the same time as the crankshaft is assembled. Since it can be assembled, the work efficiency can be improved by omitting the dedicated work process for assembling the thrust metal, and the structure of the thrust metal assembling device can be simplified and its manufacturing cost can be reduced. There is an effect.

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the crankshaft assembling apparatus of the present invention is applied to a crankshaft assembling apparatus for assembling a crankshaft and a thrust metal to a cylinder block of a type 6 six-cylinder engine.

As shown in Figures 1 to 3, a crankshut assembly device 1 is installed in the middle of an engine assembly line 2, and a cylinder block 3 is placed upside down with upper metals already assembled on its four bearings. The crankshafts 5 are conveyed to the shaft assembly station 4 on the right side of the crankshaft assembly apparatus 1, and the crankshafts 5 are placed parallel to each other with their axes oriented in the left-right direction to a shaft supply line 6 that is orthogonal to the engine assembly line 2. At the end of the shaft supply line 6, it is driven upward by a lifting and turning device (not shown), and is also driven to turn so that its axis is oriented in the front-rear direction. The shaft feeding station 7 is fed one after another. A pair of left and right metal supply devices 9 for supplying thrust metal 8 is provided behind the shaft supply station 7 , and the supplied pair of thrust metals 8 are delivered to the journal portion 5 a on the left side of the crankshaft 5 at the shaft supply station 7 . (See Figure 4)
They are held at metal holding positions at both ends, and are assembled to the cylinder block 3 together with the crankshaft 5 at the shaft assembly station 4.

The crankshaft assembling device 1 includes a shaft assembling unit 10 that assembles the crankshaft 5 to the cylinder block 3, a metal assembling unit 11 that assembles the thrust metal 8 to the cylinder block 3, and a metal supply device that assembles the thrust metal 8 to the cylinder block 3. 9 to the metal assembly unit 11; and a transport mechanism 13 that transports the shaft assembly unit 10 and the metal assembly unit 11 between the shaft supply station 7 and the shaft assembly station 4. We are prepared.

The transport mechanism 13 includes a pair of guide rails 15 attached to the front end and lower front of the upper surface of the horizontal frame 14a of the concave frame 14, respectively, and the horizontal frame 14a.
A support frame 17 of the shaft assembly unit 10 is movably supported along a guide rail 15, and the support frame 17 of the shaft assembly unit 10 is supported movably along a guide rail 15. It is designed to be driven left and right.

To explain the above-mentioned shaft assembly unit IO, in front of the support frame 17 as a movable member, there is an elevating and lowering unit that is vertically guided through a guide member 17A provided on the front surface of the support frame 17 and is erected on the support frame 17. A support arm 19 that is driven up and down by a cylinder 18 extends downward, and a pair of swing arms 20 are rotatably supported on both sides of the lower end via shaft members 21 oriented in the left-right direction.
A support bar 2 having a closed cross-section shape connects the left and right swing arms 20 to the upper end of the swing arm 20 and further extends to the left by a predetermined distance.
2 is fixed, and the swing arm 20 and the support bar 22 are integrally driven to swing around the shaft member 21 by a swing cylinder 23 provided in the middle of the support arm 19. Support plates 24 that protrude rearward are fixed to both ends of the support bar 22, respectively, and a shaft holding mechanism 25 that holds both ends of the crankshaft 5 from the outside is provided at the rear of the support plates 24. (See Figure 4)
.

Regarding the shaft holding mechanism 25, as shown in FIG. 4, a substantially cylindrical casing 26 is fixed to the outer end surface of each support plate 24. A pair of left and right holding members 27 and 28 that protrude in the left and right directions are mounted so as to be movable in the left and right direction, and the holding member 27 has a relatively large annular holding part 27a that can hold the left end of the crankshaft 5 at the inner end thereof. A relatively small annular holding part 28a capable of holding the right end of the crankshaft 5 is formed at the inner end of the holding member 28, and a holding part 28a for holding in the left-right direction is formed at the outer end of each casing 26. The cylinders 29 are fixed to each other, and their piston rods 29a pass through the casing 26 to hold the holding members 27 and 28.
The holding members 27 and 28 are driven inward as shown by the imaginary lines by driving the two holding cylinders.
J+, and the crankshaft 5 is held in each holding part 27a, 28.
It is designed to be held in the left-right direction between a.

A pair of metal supply devices 9 are provided on the left and right with a predetermined pressure apart, and as shown in FIGS. are stored horizontally in a stacked manner to form a semi-cylindrical shape with both ends facing forward, and below the metal storage section 30 both ends of the lowest layer thrust metal 8 are supported and guided forward. A pair of guide rails 31 are provided, and the guide rails 31
A hook member 32 that can be engaged with the rear end of the lowest thrust metal 8 is provided between the two so as to be movable back and forth. The thrust metals 8 are driven forward and backward by a cylinder 33, and when the hook portion 32 is driven forward, the thrust metals 8 are pushed forward and held by the swing arms 34 of the metal transport mechanism 12, respectively.

As shown in FIGS. 5 and 6, the metal transport mechanism 12 includes an attitude switching mechanism 35 that switches the attitude of the pair of thrust metals 8 supplied from the metal supply device 9 from a horizontal attitude to a vertical attitude; A swing drive mechanism 36 that swings the switching mechanism 35 to transport the thrust metal 8 held by the swing arm 34 to the metal holding position of the crankshaft 5.
It is equipped with

To explain the swing drive mechanism 36, as shown in FIG. A transport arm 38 is provided,
1. Left and right metal supply devices 9 are provided at the lower end of the general feed arm 38.
A movable attitude switching mechanism 35 is fixed therebetween, and the transport arm 38 is moved between a metal loading position shown by a solid line and a metal unloading position shown by a phantom line by a swinging cylinder 40 provided on the horizontal frame 14a. Driven to swing.

To explain the above-mentioned posture switching mechanism 35, as shown in FIG. They are rotatably provided at a predetermined distance apart, and gears 42 that mesh with each other are fixed to the rear end of each shaft member 41, and the right shaft member 41 is connected to the casing 3.
The front part of each shaft member 43 extends forward through the casing 39, and a swing arm 34 extending outward is connected to the shaft member 43 in the middle thereof. The thrust metals 8 are respectively fixed to the housing portion 34 a formed at the outer end of the swinging arm 34 and held by suction as shown in phantom lines, and both swinging arms 34 are connected to the shaft member 41 and the gear 42 by the actuator 43 . between the first rotational posture in the horizontal direction shown by the solid line in FIG. By being driven to swing, the orientation can be switched from a horizontal orientation to a vertical orientation. Note that the swing arm 34 has both shaft members 4
A spring member 44 installed between the two eccentric positions allows the second rotational posture to return to the first rotational posture.

The above metal assembly unit 11 is shown in Figs. 4 and 6 to 9.
As shown in the figure, it is provided at a position corresponding to the metal holding position near the left end of the support bar 22, and is integrally connected to the shaft supply station 7 and the shaft assembly station 4 with the shaft assembly unit 10 by the conveyance mechanism 13. The metal holding mechanism 45 is configured to be driven to be conveyed and to be driven to swing and move up and down integrally with the shaft holding mechanism 25, and holds the thrust metal 8 at the metal holding position of the crankshaft 5. , After assembling the crankshaft 5, press the thrust metal 8 and press the cylinder block 3.
a metal pressing mechanism 46 that is assembled in the proper position of the metal holding mechanism 45 and the metal pressing mechanism 46, and a moving drive mechanism 47 that drives the metal holding mechanism 45 and the metal pressing mechanism 46 forward and backward relative to the held crankshaft 5.
It is equipped with

To explain the above-mentioned moving drive mechanism 47, as shown in FIG. A pair of left and right guide rods 49 are fixed in the vicinity of the lower end in a substantially longitudinal direction, and each guide rod 49
The rear portion of the support plate 48 is inserted into a pair of receiving members 50 provided on the support bar 22 so as to be movable forward and backward, and a driving cylinder 51 is fixed between the guide rods 49 on the front end surface of the support plate 48, and the piston rod 51a is The support plate 48 is fixed to the front end surface of the support bar 22 through the support plate 48, and the support plate 48 is guided by the guide rod 49 by the driving cylinder 51 and has a working position close to the support bar 22 and a retracted position away from the support bar 22. It is adapted to be driven forward and backward across different positions.

To explain the metal holding mechanism 45, FIG.
As shown in FIG. 7, a support plate 52 is provided at the upper end of the support plate 48 and extends upwardly and along the upper surface of the support bar 22.
A support part 52a extending upward is formed in the middle of the support plate 52, and a clamp cylinder 53 is fixed to the front end surface of the support part 52a.
a is a bottomed cylindrical pressing member 55 that penetrates the support portion 52a.
The pressing member 55 is fixed to the front end thereof, and an inclined pressing surface 55a extending rearward is formed on the inner peripheral portion of the rear end of the pressing member 55.

At the rear end of the support plate 52, a pair of clamp levers 56 are rotatably supported at their fulcrum portions 56a via vertically oriented pivot pins 57, and at the rear end of each clamp lever 56. An action point portion 56b is formed that approaches the bottom of the crankshaft 5, and a pressing member 55 is formed at the front end.
An inclined pressure receiving surface 56 that extends inward and comes into contact with the inclined pressing surface 55a.
d is formed, and when the pressing member 55 is driven backward by the clamping cylinder 53, the force point portion 56c is connected to the inclined pressing surface 55a and the inclined pressure receiving surface 56.
d, the action point portions 56b rotate outward around the fulcrum portion 56a, and the thrust metal 8 held by suction on the swing arm 34 engages each action point portion 56b with the crank. They are held at metal holding positions between the arm portion 5b and the flange portion 50 of the shaft 5, respectively. The pressing member 55 is always urged rearward by an assisting spring 54A externally mounted on the piston rod 53a, and each clamp lever 56 is always urged to the unclamping side by a return spring 54B provided between the force points 56c. I'm under pressure.

To explain the metal pressing mechanism 46, FIG.
As shown in FIG. 8, a pair of guide rods 58 oriented in the front-rear direction are inserted into the middle part of the support plate 48 so as to be movable back and forth via a receiving member 59, and the rear end of the guide rods 58 is connected to a connecting member. A pressing cylinder 61 oriented in the front-rear direction is provided between the guide rods 58 on the rear end surface of the support plate 48, and its piston rod 61a passes through the support plate 48 and is connected to the approximate center of the connection member 60. A guide member 62 is rotatably supported approximately at the center of the connecting member 60 via a pivot pin 63, and a pair of left and right guide blocks 64 are fixed to the middle of the guide member 62. A guide groove 64 is provided at the inner end of the guide block 64.
A is formed into a curved shape, and a bracket 66 having a pair of left and right guide rollers 65 that engages with the guide groove 64a is fixed to the lower end surface of the support plate 52, and a left and right pair of guide rollers 65 are fixed to the rear end side of the guide member 62. A pair of pressing levers 67 are fixed, and a pressing portion 67a formed at the rear end of each pressing lever 67 is supported in close proximity to the road force of the front end of the thrust metal 8, as shown by imaginary lines in FIG. When the pressing cylinder 61 is driven, the guide member 62 and the pressing lever 67 move to the guide roller 6.
5 and the guide groove 64a, each thrust metal 8 is driven backward while drawing an arc downward, and each thrust metal 8 is driven backward through the pressing portion 67 and the guide groove 64a.
It is pressed clockwise at step a.

Next, the operation of the crankshaft assembly device 1 will be explained.

First, the crankshaft 5 conveyed to the terminal end of the shaft supply line 4 is driven upward by a lift and rotation drive device, and is also driven to rotate so that its axis is oriented in the left-right direction, and is then supplied to the shaft supply station 7. By driving the shaft holding mechanism 25, the shaft holding mechanism 25 is held between the holding parts 27a and 28a.

On the other hand, a pair of thrust metals 8 are supplied from the left and right metal supply devices 9 and held by suction in the housing portions 34a of the swinging arm 34, respectively, so that the swinging arm 34 changes from the first rotational posture to the second rotational posture. Thrust metal 8
is changed from a horizontal position to a vertical position, and then, while being held by the swinging arm 34, the swinging drive mechanism 36 rotates about the support shaft 37 from the metal loading position to the metal unloading position, and the crank It is transported to the metal holding position of the shaft 5. When the thrust metal 8 is transported, the moving drive mechanism 47 drives the metal holding mechanism 45 and the metal pressing mechanism 46 to the use position, and the clamp lever 56
The action point portion 56b of the thrust metal 8 is disposed below and close to the journal portion 5a, and the press portion 67a of the press lever 67 is disposed close to and above the front end of the thrust metal 8. is held at the metal holding position of the crankshaft 5 by the action point 56b of the clamp lever 56.

Next, when the cylinder block 3 is carried on the engine assembly line 2 to the shaft assembly station 4 of the crankshaft assembly device 1, the crankshaft 5 and the thrust metal 8 are transferred to the upper part of the shaft assembly station 4 by the transport mechanism 13. As shown by the imaginary line in Fig. 6,
The shaft holding mechanism 25 and the metal assembly unit 11 are driven downward and oscillated, and the crankshaft 5 is assembled to the cylinder block 3. At this time, as shown by the solid line in FIG. 9, the parts of the thrust metal 8 other than the part held by the clamp lever 56 are assembled to the cylinder block 3, and the crankshaft 5
After assembly, by releasing the clamp of the thrust metal 8 and operating the metal pressing mechanism 46, the front end of the thrust metal 8 is pushed downward by the pressing part 67a, and the thrust metal 8 is moved as shown by the imaginary line. It is assembled into the correct position while rotating clockwise.

As described above, by assembling the metal assembly unit 11 equipped with the metal holding mechanism 45 and the metal pressing mechanism 46 to the shaft assembly unit 10, the crankshaft 5
Thrust metal 8
It is now possible to assemble the thrust metal 8, and the work efficiency can be improved by omitting the process for assembling the thrust metal 8. The work space for assembling the crankshaft 5 can be used effectively. This has the effect of simplifying the assembly device for assembly and reducing its manufacturing cost.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a plan view of the crankshaft assembly device, FIG. 2 is a front view of the same, FIG. 3 is a side view of the same, and FIG. 4 is a crankshaft and shaft holder. FIG. 5 is a cross-sectional plan view of the metal supply device and attitude switching mechanism; FIG. 6 is a vertical cross-sectional side view of the shaft holding unit and metal holding unit; FIG. 7 is a cross-sectional bottom view of the metal holding mechanism; FIG. 8 is a cross-sectional bottom view of the metal pressing mechanism, and FIG. 9 is a vertical cross-sectional side view of the metal assembly unit for explaining the operation during metal assembly. ■...Crankshaft assembly device, 3...Cylinder block, 5...Crankshaft, 10...Shaft assembly unit 11...Metal assembly unit, 25
...Shaft holding mechanism, 45...Metal holding mechanism,
46...Metal pressing mechanism.

Claims (1)

[Claims] (1) In a crankshaft assembly device in which the crankshaft is held by a shaft holding means provided on a movable member for assembly and transfer and assembled into a predetermined position of a cylinder block, the crankshaft is held by the shaft holding means on the movable member. A crankshaft assembling device comprising a metal holding means for holding a thrust metal at a predetermined position on a crankshaft, and a pressing means for pressing the thrust metal into a proper position after the crankshaft has been assembled. .