JPH0275745A - Piston ring assembling device - Google Patents

Abstract

PURPOSE:To reduce assembling time and prevent assembling error by providing a piston ring supplying part wherein a plurality of piston ring supplying units are arranged radially and so as to form a space at a center. CONSTITUTION:A piston ring supplying part 1 is composed of first to third piston ring supplying units 2 to 4 arranged movably in a radial direction and so as to form a space at a center part. The supplying units 2 to 4 are provided with cylindrical ring stockers 5 to 7 which house a plurality of rings, ring quarrying-supplying members 11 to 13 which quarry and supply one by one first and second piston rings 8, 9 and an oil ring 10 respectively housed in the stockers 5 to 7, and the like, and so constructed as to advance and retreat in a racial direction by the operation of a cylinder 19. A piston holding cup member 21 provided with a piston holding part 22, a conical piston ring expanding guide part 23, or the like are so arranged as to movable in a vertical direction to the center space of the supplying part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a piston ring assembling machine that can automatically assemble a plurality of piston rings to a piston of an internal combustion engine or the like.

[Conventional technology]

Various methods and devices have been proposed as means for assembling piston rings to pistons of internal combustion engines, etc.; however, the applicant previously proposed a piston ring assembling device having the configuration shown in FIG. 4. (Jitsugan 60-1672)
No. 37).

That is, in FIG. 4, reference numeral 101 includes a piston support portion 101a at the upper end, and a piston ring 102 at the outer peripheral portion.
The guide cone serves as a guide for stacking and transporting the piston rings 102 to the assembly section by expanding them.
It is configured so that it can move up and down by an amount (pitch). 10
3 is a fixed upper plate, and piston passage hole 10
3a, and is disposed so that its upper edge comes into contact with the guide cone 101 when it rises. 104 is a shutter for assembling the piston ring i02, and is slidably arranged between the upper plate 103 and a fixed base 105 arranged below it, and is in an open state when not in operation, and is in a closed state. The piston ring 102 is configured to be assembled by the operation.

The ring assembling operation in the piston ring assembling device configured as described above is performed as follows. First, the piston rings 102 are stacked on the outer periphery of the guide cone 101 by a piston ring push-up mechanism (not shown) and are pushed up and conveyed under high pressure, so that the uppermost piston ring 102 is in contact with the upper plate 103.

In this state, after setting the piston 106 on the support part 101 a at the upper end of the guide cone, the guide cone 101 is lowered together with the piston 106 by the thickness of the piston ring 102 .
Switch the push-up blade from high pressure to low pressure, and press shutter 10.
4, in addition to the own contraction force of the piston ring 102, the uppermost piston ring 102 is moved into the piston sill groove of the piston 106! 06a, the piston ring 102 is assembled.

Next, the piston ring 102 is inserted into the piston ring groove 106.
After taking out the piston 106 that has been assembled to a from the support part +01a, the guide cone 101 is raised again by l pitch, and the pressing force of the piston ring 102 is switched to high pressure, and the next piston ring 102 is moved to the upper plate. 1 loco so as to be in pressure contact with each other, and one cycle of the assembly process is completed.

(Problem to be solved by the invention) By the way, the piston usually has a first ring.

Three piston rings, such as the second ring and the oil ring, are assembled. Therefore, when assembling the rings to the piston using the piston ring assembly device proposed above, the three rings are dedicated to each ring in turn. The assembling work must be performed using an assembling device, which is not only complicated, but also poses problems in terms of installation space and cost.

In contrast, conventional piston ring assembling machines that assemble multiple piston rings at the same time,
No. 1835. However, this piston ring assembling machine fits the three piston rings into the grooves of the ring setting device, expands the diameter of the rings with a ring expansion cone, clamps them in the grooves, and then It is designed to be assembled into. Therefore, when assembling rings to individual pistons, this piston ring assembling machine must set three piston rings in the ring setting device each time. There is also a great risk of incorrect assembly. Furthermore, when setting a three-wood piston ring, it is necessary to separate the piston ring joint by shifting it 120 degrees at a time to prevent gas blow-out, which poses the problem of poor workability. It is something.

The present invention was made in order to solve the problems listed in L in conventional piston ring assembling machines.

Multiple piston rings are continuously supplied and sent,
To provide a piston ring assembling machine with good workability without fear of erroneous assembling and without the need for dividing the abutment part of a ring.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a plurality of piston ring housings, a ring cutting and supplying means, and a plurality of ring holding grooves formed on the tip surface. A piston ring supply unit is arranged radially with the ring holding grooves facing the center so that a central space is formed, and the piston ring supply unit is movable into and out of the central space of the piston ring supply unit. a piston holding cup member arranged and having a ring expansion portion and a ring guide groove for guiding a piston ring supplied by the ring cutting and supplying means to the ring holding groove; The piston ring assembling machine is constituted by the internal piston receiver.

(Function) In the piston ring assembling machine configured as described above, the rings are cut out and supplied from the ring storage section of each piston ring supply unit in the piston ring supply section by the ring cutting and supply means, and the piston is held. The O cup member is fitted and held in the ring holding groove facing the central space through the ring guide groove formed in the cup member.
Each ring held in the ring retaining groove is then expanded by the ring expansion portion of the cup member, and the cup member is then retracted from the space, whereby the piston is supported by the piston receiver and held in place. The expanded rings are automatically assembled one after another into the ring grooves by their contraction force.

(Example) Examples will be described below. FIG. 1 is a schematic top view of one embodiment of the piston ring assembling machine according to the present invention, and FIG.
In Figure 0, which is a schematic front view thereof, l is a piston ring supply part, and each ring supply part l has 12
The first piston ring supply unit is arranged so as to be able to move forward and backward in the radial direction at an angle of G@ and to form a space in the center. Second piston ring supply unit 3
and an oil ring supply unit 4.

Each ring supply unit 2, 3.4 has a cylindrical ring stocker 5 for storing a large number of rings at once.
, 6.7, and a ring cut-out supply member H that cuts out and supplies one each of the first piston ring 8, ff12 piston ring 9, and oil ring lO stored in the stockers 5 and 6.7, respectively. , 12, 13 and 2. A ring cutting cylinder 15 for driving the cutting supply members 11, 12.13, and a ring cutting cylinder 15 formed at the tip facing the central space.
tJSl and a ring holder 111 that holds a portion of the second piston ring 8.91 and the oil ring IO, respectively.
116, 17, 18, and each ring supply unit 2, 3 .
Ring supply unit cylinder that advances and retreats 4 in the radial direction! 9. The ring supply unit cylinder] 9 and each ring supply unit 2, 3.4 are connected via a spring 20 for absorbing ring expansion.

Further, the supply path of the rings supplied by each ring cutting and supplying member is connected to one corresponding holding groove of each of the three ring holding grooves formed.

21 is a piston holding cup member, which has a piston holding part 22 on the inside of the upper part, a conical piston ring expansion guide part 23 on the middle side wall, and a song holding groove 16, 17, 18 of the ring supply part l on the lower part. Formed accordingly. 3
The ring guide groove 24 is arranged to be movable in the vertical direction with respect to the central space of the piston ring supply section 1, and is driven and controlled by a cup up and down cylinder 25. Each of the three ring guide grooves 24 is provided with a ring guide tapered portion 24a facing the ring supply path of each ring supply unit.

A piston receiver 27 is disposed within the upper piston holding portion Z2 of the cup member 21, and a support rod 28 connected to the piston receiver 27 via a spring slidably penetrates the axial center of the cup member 21. and extends downward;
It is supported by a support stand 30 via a spring 29. In FIG. 2, reference numeral 31 denotes an intermediate stopper whose drive is controlled by an intermediate stop cylinder 32. Also 33
4 is a stopper for regulating the downward position of the support rod 28 of the piston receiver 27, and 4 is a stopper for regulating the upward position of the cup member 21.

Next, the operation of the piston ring assembling machine configured as described above will be explained. Figure 3 (A) shows the operation condition l1i.
FIG. 3 is a diagram showing the original position state of each member when the power is turned off before I. In this state before preparation for operation, the cup up and down cylinder 25 is located at the rising end, the cup member 21 is pushed up and regulated by the stopper 4, and the ring guide groove 2
4 is ring holding part 11116.17.1 of ring supply part l
It is held at a position corresponding to 8. The ring supply unit cylinder 19 and the ring cutting cylinder 15 are located at the forward end, and each ring 8, 9, 10 is cut out and held in the ring holding groove 16, 17° 18. Note that the intermediate stop cylinder 32 is at the lower end position, so that the intermediate stopper 31 is maintained in an operating state.

Next, when the assembly operation is started from this state, first the cup upper and lower cylinders 25 are lowered, the cup member 21 is lowered, and its lower end surface is engaged with the intermediate stopper 31 as shown in FIG. 3(B). The lower end surface of the support rod 28 of the piston receiver 27 is engaged with the stopper 33. By the downward movement of the cup member 21, each ring 8, 9, 10 is expanded while being held by the ring retainers y116, 17, 18 by the expansion guide portion 23 of the cup member 21, and is expanded and held by the cup outer peripheral wall 21a. At this time, since each ring supply unit 2° 3.4 is pressed by the ring supply unit cylinder 19 via the absorption spring 20, this absorption spring 20 is compressed, and each ring supply unit 2, 3.4 is set back slightly.

Next, the piston 35 is inserted into the cup member 2 and supported by the piston receiver 27. As a result, the piston receiver 27
is pushed in a little, and the piston receiver on the upper end surface of the support rod 28 is locked to the upper end surface of the guide 37.

In this state, the piston 35 is held at a position where its ring groove 36 and each ring 8, 9, 10 which are held expanded are corresponding to each other.

Further, due to the pushing operation of the piston receiver 27, the piston receiver closes the air vent 38 of the guide 37, and the pressure of the air supplied to the air vent 39 penetrating through the support rod 27 increases, and a pressure switch (not shown) is activated. is driven and a piston setting completion signal is output. Then, in response to this signal, the intermediate stop cylinder 32 is raised and the intermediate stopper 31 is released, and as shown in FIG. By the operation to the lowering end, only the cup member 21 is lowered. Due to this downward movement of the cup member 21, each of the rings 8, 9, .
The IO comes off from the outer circumferential wall 21a of the cup member 21, and due to their compression force, the piston ring groove 36 of the piston 35
, oil ring 10. 2nd ring9. The first ring 8 is assembled in sequence. Then, both the piston ring supply unit cylinder 19 and the ring cutting cylinder 15 are retracted, and each ring supply unit 2.3.4 is in the retracted position.

Next, when the piston 35 with the ring assembly completed is taken out, the piston receiver 27 is raised by the spring, a pressure switch (not shown) is turned off, and the next operation signal is output after a predetermined period of time has elapsed. When this next operation signal is output, as shown in FIG. 3(D), the cup upper and lower cylinders 25 are operated to the rising end, and the cup member 21 rises until it is stopped by the stopper 34.

The stopper 34 restricts the raised position of the cup member 21 so that the ring guide groove 24 of the cup member 21 coincides with the ring holding groove 16, 17, 18 of each ring supply unit 2, 3.4.

Further, when the force/pump member 21 is stopped by this stopper 34, the intermediate stop cylinder 32 is driven to the lower end position by a rising end switch (not shown) as shown in FIG. 3(E). At the same time, the ring supply unit cylinder 19 is also moved forward.

Next, the ring cutting cylinder 15 is operated to the forward end by the forward end switch of the ring supply unit cylinder 19, and the ring cutting supply member! 1, 12.13 cut out rings 8, 9゜lO from each ring stocker 5, 6.7, and each cut out ring 8゜9.1 (] is the tapered part of the ring guide yI24 at the lower part of the cup member 21. 24a
The ring is guided while being pushed apart by the ring supply unit 2, 3.4, and set in each ring holding groove 16, 17, 18 of the ring supply unit 2, 3.4.

Next, by the operation of the forward end switch of the ring cut-out cylinder 15, the cup upper and lower cylinders 25 are lowered, and the cup member 21 is engaged with the intermediate stopper 31 to be in an intermediate stop state.The 1 cycle operation is completed by an operation of 0 or more. Then, the next cycle operation starts.

As described above, in the present invention, several hundred rings are collectively stored in the cylindrical ring stocker 5°6.7 of each ring supply unit 2, 3.4, and the rings are cut out one after another. Since the ring is supplied to the ring holding groove, by setting the ring in a predetermined state when storing it in the stocker, it is possible to completely prevent the occurrence of '7alIi on the front and back of each ring. In addition, since the three sets of ring supply units are arranged radially at an angle of 120°, the piston rings are inevitably divided into 120° sections when the piston is assembled. There is no need to divide the ring after assembly, and the expansion of the ring is carried out at the time of assembly only for the rings that will be assembled in that assembly cycle, which is not only advantageous in terms of maintaining the quality of the ring, but also
The power required to perform the expansion operation can be reduced.

(Effects of the Invention) According to the present invention, a plurality of piston rings can be automatically supplied and assembled into the piston groove at the same time by the piston ring assembling machine, thereby reducing the assembly time. . In addition, each piston ring is sequentially cut out and supplied from the ring storage section of each ring supply unit, so
There is no risk of incorrect assembly, and there is no need to divide the ring abutment, so work efficiency is improved and the installation space and manufacturing cost of the device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic top view of an embodiment of a piston ring assembling machine according to the present invention, FIG. 2 is a schematic front view thereof, and FIG.
A) to E) are diagrams showing the operating mode thereof, and FIG. 4 is a schematic diagram showing an example of a conventional piston ring assembling machine. In the figure, l is a piston ring supply unit, 2 is a first piston ring supply unit, 3 is a second piston ring supply unit, 4 is an oil ring supply unit 5, 6.7
8 is the first piston ring, 9 is the second piston ring, 10 is the oil ring, 11.12
．． 13 is a ring cut-out supply member, 15 is a ring cut-out cylinder, 16, 17, 18 are ring holding grooves, 19 is a ring supply unit cylinder, 21 is a cup member, 22 is a piston holding part, 23 is a piston ring expansion guide part ,
z4 is a ring guide groove, 25 is a cup upper and lower cylinder, 27
is the piston receiver, 28 is the support rod, ko0 is the support stand, 3
1 is an intermediate stopper, 2 is an intermediate stop cylinder, 3
3.34 is a stopper, and 35 is a piston.

Claims (1)

[Claims] A plurality of piston ring supply units each having a piston ring storage section, a ring cutting and supplying means, and a plurality of ring holding grooves formed on the tip surface are arranged radially in a central space with the ring holding grooves directed toward the center. a piston ring supply section arranged so as to form a piston ring supply section; and a piston ring supply section arranged so as to be movable in a central space of the piston ring supply section, and supplied to the ring expansion section and the ring holding groove by the ring cutting supply means. A piston holding cup member having a ring guide groove for guiding a piston ring, and a piston receiver slidably housed in the cup member, and a plurality of piston rings held by the ring holding groove. A piston ring assembling machine characterized in that the piston ring assembling machine is configured so that it can be expanded by a cup member and assembled at the same time.