JPH035935B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a setting table in which a cylinder block in which a plurality of pistons with connecting rods are inserted into a machine frame can be set freely, and a mechanism for raising and lowering the lower side of the setting table. A connecting rod assembling device is provided with a movable elevating platform, a crankshaft is set on the elevating platform, the crankshaft is raised, and each pin part of the crankshaft is connected to a large end of each conrod. This invention relates to a cooking stove positioning device.

(Prior Art) The applicant of the present application first provided a movable frame on the machine frame that can move forward and backward in the lateral direction toward a cylinder block set on a setting table, and installed each connecting rod on the movable frame. A plurality of positioning tools for axially positioning the piston pins are arranged in line with the bore pitches of the cylinder block so that the center line matches the axis of each piston, and the metal attached to the tool is attached to the large end of each connecting rod. We have proposed a positioning device that positions each connecting rod so that each pin part of the crankshaft can be connected without damaging it.

(Problems to be Solved by the Invention) Incidentally, it is desirable to be able to position each connecting rod of a plurality of types of cylinder blocks so as to be compatible with many types of cylinder blocks.

Here, it is conceivable to form a long hole in each positioning tool in the axial direction of the crankshaft, and to bolt each positioning tool to the movable frame so that it can move freely in the long hole. Depending on the model, the operator must move each positioning tool by tightening and loosening the bolts one by one, which is cumbersome.

An object of the present invention is to provide an apparatus that can solve these problems and satisfy the above-mentioned needs.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a machine frame with:
A setting table into which a cylinder block into which a plurality of pistons with connecting rods are inserted is provided, and an elevating table below the setting table which can be moved up and down, and a crankshaft is set on the elevating table and the cylinder A connecting rod positioning device in a crankshaft assembly apparatus in which each pin of the crankshaft is connected to a large end of each connecting rod by being raised toward the block side,
A movable frame that can move back and forth in the lateral direction toward the cylinder block set on the setting table is provided, and piston pins are attached to the movable frame so that the center line of each connecting rod coincides with the axis of each piston. In a system in which a plurality of positioning tools for positioning in the axial direction of the cylinder block are arranged in parallel according to the bore pitch of the cylinder block, each of the positioning tools is switchable and movable depending on the cylinder block model, and each positioning tool is connected to the cylinder block. It is characterized in that it can be freely switched and moved according to the model of the positioner, and that a drive source for moving each of the positioning tools is provided.

(Function) Since each positioning tool is switched and moved by the drive source according to the model of the cylinder block, the positioning of each connecting rod of a plurality of types of cylinder blocks can be achieved.

Moreover, since the switching movement of each positioning tool is automatically performed by the drive source, the workability of switching movement is good.

(Example) The drawing shows a piston C with connecting rod B inserted in advance into each cylinder bore of cylinder block A of an in-line 4-cylinder engine, transported to a predetermined assembly station, and then assembled with a crankshaft D. 1 to 3, 1 is a roller conveyor for conveying cylinder block A, 2 is a machine frame provided at an assembly station, and 3 is a roller conveyor for conveying cylinder block A.
4 indicates a setting table provided on the upper side of the machine frame 2, and 4 indicates a lifting platform provided on the lower side of the machine frame 2. The cylinder block 1 is supported on the work receiver 7 by the lifting of the set table 3, and is slightly lifted from the conveyor 1. so that each cooking rod B can be positioned in a hanging state, and the lifting platform 4 is slidably attached to a rail 8 hanging vertically on the machine frame 2.
The screw rod 9 provided in the nut sleeve 4 of the lifting platform 4
A is screwed into the platform 4 so that the lifting platform 4 can be moved up and down by a motor 10 that rotates the screw rod 9 in the forward and reverse directions.

Using the four positioning tools 12 provided on the movable frame 11 of the machine frame 2, each connecting rod B of the cylinder block A positioned on the setting table 3 is moved so that its center line coincides with the axis of each piston C. Position the piston pin in the axial direction, set the crankshaft D on the lifting table 4, raise it toward the crankshaft A side, and attach each pin portion of the crankshaft D to the large end of each connecting rod B. I made it possible to connect P.

More specifically, in the illustrated example, the lifting platform 4
As shown in FIG. 3, a plurality of positioning pins 13 that can be retracted upward are provided on the upper side, and these positioning pins 13 are protruded and placed on the upper side of the lifting table 4 via a conveyor 14 placed on the side thereof. The setting jig 15 to be loaded can be positioned and held on the lifting table 4, and the setting jig 15 has one end of the crankshaft D on the upper side of the pallet 16, as shown in FIGS. 4 to 6. A support 17 that fits into the chamfered portion G to prevent and support the crankshaft D.
and a support 18 supporting the other end of each spring 1.
These supports 1
7 and 18, and a plurality of sockets 20, each of which is biased upward by a spring 21, are provided in the pallet 16, each having a plurality of sockets 20 at the tips of which nuts N can be freely set, as shown in FIG.
A pin 22 is attached to a spring 22a at the tip of each socket 20.
A conrod cap E is positioned and held at the tip of each socket 20 by inserting each pin 22 into its bolt hole. Therefore, the crankshaft D can be set on the lifting platform 4 via the setting jig 15.

In addition, a mounting plate 23 is attached to the machine frame 2 directly below the lifting platform 4.
It is slidably installed on a rail (not shown) hanging vertically on the
Each socket 2 of the setting jig 15 is attached to the mounting plate 23.
A concave portion 24a at the tip that can be freely engaged and detached from the drive shaft 20a of
A nut runner 24 having a
The piston rod of the docking cylinder 25 attached to 3 is connected to the lifting platform 4, and the mounting plate 23 is connected to the vertical movement of the lifting table 4 due to the operation of the docking cylinder 25, and the vertical movement of the lifting table 4. I made it possible to give linked movements.

Further, as shown in FIGS. 7 to 9, the movable frame 11 is moved laterally toward the cylinder block A set on the setting table 3 by the first cylinder 27 along the rail 26 fixed to the machine frame 2. It is composed of a first movable frame 28 that moves forward and backward, and a second movable frame 30 that moves forward and backward with respect to the first movable frame 28 by a second cylinder 29 attached to the first movable frame 28, and each of the positioning tools Reference numeral 12 denotes a guide groove 12a into which the large end of each connecting rod B is inserted and positioned.
These positioning tools 12 are attached to the tip of the second movable frame 30 in alignment with the bore pitch of the cylinder block A, and the first movable frame 28 is moved by the forward movement of the first cylinder 27. As a result, the positioning tools 12 are moved forward to the vicinity of the large end of each connecting rod B of the cylinder block A on the setting table 3, and the second movable frame 30 is moved forward by the movement of the second cylinder 29 toward the forward side. First movable frame 28
The large end portions can be inserted into the guide grooves 12a by the movement relative to the guide grooves 12a.

Here, each of the positioning tools 12 is provided so as to be freely switchable depending on the model of the cylinder block A, and a drive source 31 for moving each of the positioning tools 12 is provided.

To explain this in detail, each positioning tool 12 is the seventh
As shown in the figure, the second movable frame 30 is attached to the tip of the second movable frame 30 via slide bearings 32 so as to be movable in the axial direction of the crankshaft D.
Of the two positioning tools 12, the two positioning tools 12, 12 shown by W and Y in FIG. 8 and the two positioning tools 12, 12 shown by A cylinder serving as the drive source 31 is attached to the tail end of the stay 3, and a piston rod of the cylinder is attached to the tail end of the positioning tool 12 of the X.
4 and 34, and further the second movable frame 3
Stoppers 35 and 65 for regulating the movement of both the X and Y positioning tools 12 and 12 are provided at the 0, respectively.

In the drawing, reference numerals 36 and 36 indicate bolt holders that move laterally toward and away from the cylinder block A on the setting table 3, and each bolt holder 36 is attached to the cylinders 37 and 37.
As the cylinder block moves forward toward the forward side, the head of the conrod bolt F of the movable frame of each conrod B is covered from above, and when inserted into the bolt hole of each conrod cap E, the large end of the conrod bolt F is covered from above. Hold it down so it doesn't fall out.

Reference numeral 38 indicates a conveyor provided on the lifting table 4 for discharging the setting jig 15. Next, to explain the operation of the embodiment, first, the cylinder block A is transported and set on the setting table 3 of the assembly station, and then each positioning tool 12 is moved to the cylinder block A side by the operation of the first and second cylinders 27 and 29. According to this, the guide groove 1 of each positioning tool 12 moves forward.
The large end of each conrod B is inserted into 2a, and the conrod B is positioned in the axial direction of the piston pin so that it is located in the center of the piston pin, and the posture of the conrod is fixed by its own weight. The center line of is aligned with the axis of each piston C.

Next, attach each bolt retainer 36 to cylinder block A.
While moving forward to the side, each positioning tool 12 is retreated.

In addition, a setting jig 1 is provided in which the crankshaft D and the stove cap E are set on the upper side of the lifting platform 4.
5 and position it on the lifting platform 4, and after completing the positioning of each conrod B as described above, operate the motor 10 to raise the elevator platform 4, and place a crank on the large end of each conrod B. While touching each pin part P of the shaft D, insert the conrod bolt F at the large end into the bolt hole of each conrod cap E, and then operate the docking cylinder 25 to attach it to the lifting platform 4. The mounting plate 23 is raised and the drive shaft 20a of each socket 20 is connected to the recess 24a of each nut runner 24 to operate each nut runner 24. According to this, each nut N is tightened to each conrod bolt F. .

Thereafter, the lifting table 4 is lowered, the setting jig 15 on the lifting table 4 is delivered by the conveyor 38, and the cylinder block A on the setting table 3 is transferred to the roller conveyor 1.
to complete the assembly work.

In addition, the switching movement of each positioning tool 12 is performed by a driving source 31.
This is done automatically by the operation of the drive source 31.
According to the movement of the barrel cylinder to the extension side, X and Z
The positioning tools 12, 12 move downward in FIG. 8, the X positioning tool 12 comes into contact with the stopper 35, and both positioning tools 12, 12 stop, and the W and Y positioning tools continue to move toward the extension side. Due to the reaction force from the X positioning tool 12 acting on 12, 12,
Both the positioning tools 12, 12 move upward, and the Y positioning tool 12 comes into contact with the stopper 35, and the two positioning tools 12, 12 are stopped. Therefore, each of the positioning tools 12 is switched to a state in which the distances between the W and X and Y and Z positioning tools 12 are relatively narrow (the state shown by chain lines in FIG. 8).

Moreover, according to the operation toward the contraction side, the X and Z positioning tools 12, 12 move upward, and the X positioning tool 12 moves upward.
comes into contact with the stopper 35 and the two positioning tools 12,
12 stops and continues to operate toward the contraction side.
Due to the reaction force from the X positioning tool 12 acting on the and Y positioning tools 12, the two positioning tools 1
2 and 12 move downward, the Y positioning tool 12 comes into contact with the stopper 35, both positioning tools 12 and 12 stop, and each positioning tool 12 adjusts the distance between the W and X and Y and Z positioning tools 12. Each of them is switched to a relatively wide state (the state shown by the solid line in FIG. 8).

(Effects of the Invention) As described above, according to the present invention, since each positioning tool can be switched and moved freely, each connecting rod of many types of cylinder blocks can be positioned, and these positioning tools can be switched by a drive source. Since the movement is performed automatically, the switching operation can be performed easily and quickly, which has the effect of improving the efficiency of the switching operation.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an example of a crankshaft assembly device included in the device of the present invention, and FIG.
3 is an enlarged view of the main parts, FIG. 4 is a front view of the setting jig, FIG. 5 is a plan view thereof, FIG. The figure is a side view of the positioning tool, FIG. 8 is a plan view thereof, and FIG. 9 is a front view thereof. 2... Machine frame, 3... Setting table, 4... Lifting table,
11...Movable frame, 12...Positioning tool, 31...
Drive source, A...Cylinder block, B...Conrod, C...Piston, D...Crankshaft, P...Crankshaft pin.

Claims (1)

[Claims] 1. A setting table into which a cylinder block with a plurality of pistons with connecting rods can be set is provided in the machine frame, and an elevating table below the setting table which can be moved up and down, and a crankshaft is set on the elevating table. A connecting rod positioning device in a crankshaft assembling device in which the connecting rod is raised toward the cylinder block side and each pin portion of the crankshaft is connected to the large end of each connecting rod, the connecting rod positioning device being A movable frame is provided which can move back and forth in the lateral direction toward the cylinder block set on the setting table, and each connecting rod is mounted on the movable frame so that its center line coincides with the axis of each piston. A plurality of positioning tools for positioning the piston pin in the axial direction are arranged in parallel according to the bore pitch of the cylinder block, and each of the positioning tools is movable and can be switched according to the model of the cylinder block, and each of the positioning tools is 1. A conrod positioning device in a crankshaft assembly device, characterized by being provided with a movable drive source.