JP3036978B2 - Dummy weight mounting device for crankshaft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a dummy weight on a crankshaft for automatically measuring and correcting the balance of a crankshaft having residual unbalance. It is.

[0002]

2. Description of the Related Art A crankshaft used in an automobile engine is a crank journal which is supported by a main bearing of a crankcase and serves as a center of rotation.
Crank pins for attaching connecting rods,
It is composed of a crank arm connecting these, and a web made of a balance weight provided on the crank arm for improving the balance of rotation.

FIG. 14 shows an example of a crankshaft (1) used in a five-cylinder four-stroke engine. The illustrated crankshaft (1) has first to sixth crankshafts.
, The first to fifth crankpins (3a) to (3e), and the first to ninth webs (4a) to (4j).

The above-described crankshaft (1) is rotated with the crank journals (2a) to (2f) supported in order to more precisely adjust the balance during rotation of the crankshaft (1). Measure the balance,
Based on the measurement result, an adjustment hole for balance adjustment is formed in the outer peripheral surface of the predetermined web.

In an automobile engine, an engine having a special arrangement of three or less cylinders or an engine having four or more cylinders, for example, in the above-described five-cylinder four-cycle engine, the inertia of a piston and a connecting rod generated during engine operation. In order to cancel the force, an unbalance corresponding to the inertia force of the crankshaft (1) may be left (hereinafter referred to as a residual unbalance).

However, as described above, if a residual unbalance is left on the crankshaft (1), the crankshaft (1) is rotated to adjust the balance of the crankshaft (1). (1) There is a problem that the residual unbalance of the measurement itself hinders the measurement, and accurate balance measurement cannot be performed.

For this reason, the following method has conventionally been used for adjusting the balance of the crankshaft (1) having the above-mentioned residual unbalance.

A. The crankpins (3a) to (3e) of the crankshaft (1) have additional masses (hereinafter referred to as dummy weights) corresponding to the inertial forces of the piston and the connecting rod.
And reproduce the same state as when the crankshaft (1) is installed in the engine, and perform measurement in this state.

B. Dummy weights for each crank pin,
Rather than individually mounting, measurement is performed by attaching the reduced mass of the total mass of the dummy weight to the rotating part of the measuring machine.

C. The crankshaft (1) is rotated without canceling the residual unbalance of the crankshaft (1), and the reduced mass of the dummy weight is corrected by an electrical unit or the like in a calculation unit of the measuring machine, and a measurement result is obtained.

[0011]

As described above, each of the crank pins (3a) to (3e) of the crankshaft (1) is used.
The ideal measurement method is to attach dummy weights to the crank pins (3a) to (3e) of the dummy weights.
Installation and removal to and from the device must all be performed manually, and there is a problem that the work efficiency is very poor.

Although the method of mounting the dummy weight on the rotating part of the measuring machine is efficient, this method requires that the positions of the crank pins (3a) to (3e) are dimensionally located on the drawing. If the positions of the crankpins (3a) to (3e) of the actual crankshaft (1) are shifted in the radial direction or the circumferential direction, a correction error occurs and the measurement accuracy decreases. there were.

Further, when the crankshaft (1) is rotated without canceling the residual unbalance, and the method of electrically correcting is adopted, the measurement is performed in a state where there is a large unbalance mechanically. There was a problem that it was very difficult to obtain good results.

[0014]

SUMMARY OF THE INVENTION A dummy weight consisting of an upper dummy weight and a lower dummy weight and integrated with a set screw previously incorporated in the upper dummy weight for attaching and detaching to and from each crankpin of a crankshaft. Mounting equipment,

An elevating table having a main frame composed of a plurality of columns and a predetermined number of nut runners supported by the main frame so as to be vertically movable and corresponding to each set screw of the upper dummy weight;

An upper dummy pallet having a bit engaged with each set screw of the upper dummy clamper for supporting the upper dummy weight and the upper dummy weight, which is detachably supported below the lift table, and connected to the nut runner. When,

A slider which horizontally moves between directly below the upper dummy pallet and a crankshaft transfer point, and a lower dummy receiver for supporting a lower dummy weight and a lower dummy for lower dummy weight clamp, which are detachably mounted on the slider. And a lower dummy pallet having a dummy clamper.

[0018]

As described above, the dummy weight is divided into upper and lower parts, and can be integrated by the set screw incorporated in the upper dummy weight.

The upper dummy weight is supported to be able to move up and down, the lower dummy weight is supported to be able to move horizontally, and the set screw of the upper dummy weight is connected to the nut runner. This enables automation of desorption to and from the equipment.

[0020]

FIG. 11 shows the entire construction of a work station in which a device for mounting a dummy weight for a crankshaft according to the present invention is installed.

In the figure, (10) is a device for mounting a dummy weight for a crankshaft according to the present invention.
1) is a measuring station facing a dummy weight mounting device (10) for a crankshaft via a reversing device (12).

The measuring station (11) has a first
And the second measuring devices (13) and (14) and each measuring device (1
3) correction devices (15), (16), (17) for drilling balance adjustment holes in the crankshaft (1) based on the measurement results of (14) are arranged on the circumference; The first measuring device (13) is arranged so as to face the dummy weight mounting device (10) for the crankshaft.

As shown in FIGS. 12 and 13, the reversing device (12) is provided with crankshafts (1) at both ends of a band-like plate (12a) rotatably supported 180 degrees and vertically movable. ) Supporting arms (12b) (12c)
The autoloader (1
After placing the crankshaft (1) on the arms (12b) and (12c) by 8), the belt-like plate (12a) is
By rotating the crankshaft by 0 degrees, the crankshaft (1) can be positioned at two positions, that is, the dummy weight mounting device (10) side and the first measuring device (13) side.

Then, the crankshaft (1) conveyed from the previous step is moved by the autoloader (18).
First, it is mounted on one arm (12b) of the reversing device (12) and taken in from the reversing device (12) into the dummy weight mounting device (10), in which each crank pin of the crankshaft (1) is placed. A dummy weight (20) is attached to (3a) to (3e).

Next, the dummy weight (20) is attached, and the crankshaft (1) carried out from the dummy weight attaching device (10) is returned to the reversing device (12), and the first crankshaft (1) is returned by the reversing device (12). It is set on the measuring device (13).

After the crankshaft (1) set in the first measuring device (13) is measured for the balance, the correction device (1)
5) sent sequentially to (16), after the first correction, sent to the second measuring device (14), and the balance measurement is performed again, and then sent to the correcting device (17); If re-correction is necessary, the correction is performed again, and the process returns to the first measuring device (13).

In this manner, the crankshaft (1)
Returns to the first measuring device (13), the crankshaft (1) is taken out of the first measuring device (13) by the reversing device (12) and sent again into the dummy weight attaching device (10). , Where the dummy weight (2
After the removal of 0), it is sent to the next step.

When the crankshaft (1) is carried out of the first measuring device (13), the crankshaft is completely replaced with the crankshaft (20) in the dummy weight mounting device (10). (1) is carried in, and thereafter, the above operation is continuously performed.

Next, the dummy weight mounting device (10) incorporated in the above series of operations will be described. Before that, each dummy pin (3a) of the crankshaft (1) is mounted by the dummy weight mounting device (10). ) To (3e)
The structure of the dummy weight (20) to be attached to and detached from will be described.

As shown in FIG. 10, the dummy weight (20) is a semi-ring shaped upper dummy weight (21).
The upper dummy weight (21) has two set screw support holes (23). The lower dummy weight (22) has set screw support holes. Set screw through hole (2
4) and a pin hole (2) for positioning and fixing a pin nut (27) described later in the set screw through hole (24).
5) is drilled.

Then, in the set screw support hole (23),
A set screw (26) having a screw portion screwed to the screw portion provided on the small diameter portion (23a) and a neck portion connected to the screw portion is rotatably and vertically movable in a state where the screw is prevented from being removed by the small diameter portion (23a). ing.

The pin nut (27) fixed in the pin hole (25) has a cylindrical shape, and has a shape in which a screw hole (27a) is screwed in a diametric direction with a set screw (26). The pin nut (27) is inserted so as to be orthogonal to the set screw through hole (24), and the set screw through hole (2) is inserted.
4) After the screw hole (27a) is made coaxial,
By fixing the lock screw (28) in the pin hole (25), a screw hole (27a) to be screwed with the set screw (26) is formed in the set screw through hole (24).

After the crankpins (3a) to (3e) of the crankshaft (1) are sandwiched between the upper dummy weight (21) and the lower dummy weight (22), the set screw ( 26) is screwed into the screw hole (27a) of the lower dummy weight (22) so that the dummy weight (20) is fixed to the outer periphery of the crank pins (3a) to (3e).

The upper and lower dummy weights (21) (2)
2) are provided with clamp holes (30) and (31). When the upper and lower dummy weights (21) and (22) are removed from the crank pins (3a) to (3e), the clamp holes (3) and (3e) are removed.
0 and 31 include upper and lower dummy clampers (7
5) (104) is inserted and upper and lower dummy weights (2
1) (22) is separated from the crankpins (3a) to (3e).

FIGS. 1 to 6 show the above-mentioned upper and lower dummy weights (21) and (22) by connecting each of the crankpins (3) of the crankshaft (1) for the five-cylinder four-cycle engine shown in FIG.
It is a figure which shows the dummy weight attaching apparatus (10) for fixing to (a)-(3e).

In the figure, (40) is a main body frame composed of a plurality of columns, and (41) is a slider that moves up and down along a guide rail (42) fixed to the main body frame (40). , (43) are sliders (41)
The lifting platform (44) fixed to is a lift cylinder for raising and lowering the lifting platform (43).

(45) is a nut runner arranged above the elevating platform (43), and (46) is a nut runner (45)
The nut runner (45) is provided with five pairs of upper and lower dummy weights (21) and (22) on five crank pins (3a) to (3e) of the crankshaft (1). ) Can be fixed simultaneously, that is, in this embodiment, ten nut runners (45) are two.
They are arranged so as to form one set.

Reference numeral (50) denotes an upper dummy pallet for supporting an upper dummy weight (21) detachably supported on the lower surface of the lifting platform (43). In this embodiment, five upper dummy weights (21) are provided. 21) can be supported.

Reference numeral (51) denotes a lower dummy pallet for supporting a lower dummy weight (22). In this embodiment, the lower dummy pallet can support five lower dummy weights (22).

The lower dummy pallet (51)
It is detachably supported by a slider (52) that can reciprocate between a position directly below the lifting table (43) and a crankshaft transfer point by the autoloader (18), and can move between them.

(53) is a guide rail laid on a bed (54) supporting the main body frame (40) and the reversing device (12) in order to slide the slider (52) in the horizontal direction. The slider (52) can be moved horizontally by expansion and contraction of a two-stage cylinder (not shown).

As shown in FIGS. 2 to 6, the upper dummy pallet (51) is fixed to the elevator (43) after being positioned by the positioning pins (59) with respect to the elevator (43). A first support plate (61) fixed to a lower surface of the lifting platform (43) by an upper clamper (60);
A second support plate (63) supported below the first support plate (61) via a support (62); and five upper support members elastically supported below the second support plate (63). Dummy weight (2
A skeleton is formed by 1) and the five corresponding third support plates (64).

The first support plate (61) has an elevator (4)
Ten rotation shafts (66) connected via a universal joint (65) to ten nut runners (45) fixed to 3) are rotatably supported, and each of the rotation shafts (66) is supported. Are spline-fitted with ten connecting shafts (67) rotatably and vertically liftably supported on the second support plate (63).
A rear end of each bit (69) penetrating through two guide cylinders (68) fixedly mounted on the third support plate (64) is detachably connected to a front end of 7).

In the figure, (67a) indicates each connecting shaft (6).
7) is a spring for constantly pressing elastically downward.

When the nut runners (45) are operated, the rotational force is applied to the third support plate (64) via the universal joint (65), the rotating shaft (66), and the connecting shaft (67).
Are transmitted to the bit (69) set two by two.

In this embodiment, the attachment and detachment of the upper and lower dummy weights (21) and (22) to and from the crank pins (3a) to (3e) of the crank shaft (1) are as follows.
As shown in FIGS. 4 to 6, the rotation shaft (66), the connection shaft (67), and the bit (6
The position in the horizontal direction of 9) and the height of each third support plate (64) correspond to each crankpin (3a) of the crankshaft (1) set on the dummy weight mounting device (10).
(3e).

As a method of elastically supporting each third support plate (64) with respect to the second support plate (63), the lower end has the third support plate.
The upper part of the rod (70) fixed to the support plate (64)
The rod (70) is slidably inserted into a guide cylinder (71) fixed to the second support plate (63) to prevent the rod (70) from coming off, and a lower end surface of the guide cylinder (71) and a stepped portion of the rod (70). The spring (72) is press-fitted between the second support and the third support plate (64) so as to be elastically supported while being constantly pressed downward.

(75) is a portion of each third support plate (64) located between the bits (69) and (69), that is, the third support plate (64).
An upper dummy clamper suspended and supported at the center of the support plate (64), the tip of which is inserted into the clamp hole (30) of the upper dummy weight (21).

As shown in FIGS. 8 and 9, the upper dummy clamper (75) is provided with a second support plate (63) and a third support plate (63) by a bracket (76) fixed to the second support plate (63). 64), an outer cylinder (77) suspended and supported between
A guide cylinder (78) extending downward from the distal end of the outer cylinder (77), the distal end of which extends through the third support plate (64).
The rear end protrudes from the rear end of the outer cylinder (77), the front end reaches the substantially front end of the guide cylinder (78), and the spring (7)
9) an operating rod (80) constantly pressed upward by the elastic force, a ball hole (81) provided at the tip of the guide cylinder (78), and a ball groove (82) provided at the tip of the operating rod (80). ) And a steel ball (83) interposed therebetween.

As shown in FIG. 9, the ball groove (82) includes a shallow groove (82a) located on the tip side of the operating rod (80) and a deep groove (82b) connected to the shallow groove (82a). Consists of

When no external pressure is applied to the operating rod (80), as shown in the right half of FIG. 9, the operating rod (80) slides upward by the elastic force of the spring (79), and the shallow groove (82a). ) Abuts against the steel ball (83), a part of the steel ball (83) protrudes to the outer periphery of the guide cylinder (78), and the upper dummy clamper (75) is locked.

When the operating rod (80) is pressed downward by the external pressure and slides downward against the elastic force of the spring (79), the steel ball (83) operates as shown in the left half of FIG. The rod is inserted into the deep groove (82b) of the rod (80) and can be moved inward of the guide cylinder (78), so that the lock is released.

(85) The operation rod (80) and the second support plate (63) for simultaneously unlocking the upper dummy clamper (75) set on each third support plate (64). And an uncrank plate arranged between the two.

This uncrank plate (85)
The lower surface of each operating rod (8
0), and does not interfere with various members located between the second support plate (63) and the third support plate (64). Support plate (63)
Are vertically movably supported by two rods (86) and (86) penetrating therethrough.

Each of the rods (86) is connected to the first support plate (6).
It is vertically movably supported by a guide cylinder (87) disposed between 1) and the second support plate (63), and is constantly pressed upward by the elastic force of a spring (88).

In the normal state, since the rod (86) is moving upward, the uncrank plate (8)
5) and the operating rod (80) are in a non-contact state, and the upper dummy clamper (75) is in a locked state.

Each rod (86) of the lifting platform (43)
A rod pressing unclamping cylinder (89) is fixedly provided at a position facing the upper end of the rod, and the rod (86) is pressed downward by the unclamping cylinder (89).
The lock of the upper dummy clamper (75) is released by lowering the unclamping plate (85) and pressing the operating rod (80) downward.

The lower dummy pallet (51) described above
The pallet body (100) detachably supported on the slider (52) and the five third support plates (64) provided with the upper dummy clampers (75) are respectively opposed to the pallet body (100). 100) Five lower dummy receivers (10) supporting the lower dummy weights (22) disposed thereon.
1) and the pallet body (100) and each lower dummy receiver (10) to elastically support each lower dummy receiver (101).
Support rods (102) arranged two by two between 1) and
And a lower dummy clamper (104) arranged at the center of each dummy receiver (101).

The support rod (102) is vertically movably supported by a guide member (105) fixedly mounted on the pallet body (100), and the distal end thereof is supported by a lower dummy receiver (10).
1), and the lower end is prevented from coming off with respect to the guide member (105).

Then, in this state, the guide member (105)
The spring (106) is interposed between the upper surface of the lower dummy receiver (101) and the lower dummy receiver (1).
01) is always supported elastically in the upward direction.

The lower dummy clamper (104) has the same structure as the upper dummy clamper (75), and has a fixed outer cylinder (107) of the pallet body (100) and a tip of the outer cylinder (107). Guide tube (108) extending upward from the upper end, and the tip of which extends through the inside of the lower dummy receiver (101).
The rear end protrudes from the rear end of the outer tube (107), the front end reaches the substantially front end of the guide tube (108), and is always pressed downward by the elastic force of a spring (not shown). (109), a ball hole (not shown) provided at the tip of the guide cylinder (108), and an operating rod (109).
A steel ball (not shown) interposed between a ball groove (not shown) provided at the tip.

As in the case of the upper dummy clamper (75), the ball groove (not shown) has a shallow groove (not shown) located on the tip side of the operating rod (109), and this shallow groove (not shown). ) And a continuous deep groove (not shown).

When no external pressure is applied to the operating rod (109), the operating rod (109) slides downward by the elastic force of a spring (not shown) and the shallow groove (not shown) (Not shown), a part of the steel ball (not shown) projects to the outer periphery of the guide tube (108), and the lower dummy clamper (104) is locked.

When the operating rod (109) is pressed upward by the external pressure and slides upward against the elastic force of a spring (not shown), the steel ball (not shown) is moved by the operating rod (109). Into a deep groove (not shown)
Since the guide tube (108) can move inward, the lock is released.

Further, the five lower dummy receivers (10
As shown in FIGS. 3 and 4, a roller (120) is attached to the pallet body (100) supporting 1) so that the pallet body (100) can be easily attached to and detached from the slider (52). And the pallet body (10
0) and the slider (52) have pin holes (122) (1) through which positioning pins (121) for positioning both of them pass.
23) is drilled, and the slider (52) has
After the positioning of the pallet body (100) with respect to the slider (52), the pallet body (100) is moved to the slider (5).
A clamper (124) for fixing to (2) is attached.

The lower dummy clamper (104) is pressed by pressing the operating rod (109) upward at a position facing the operating rod (109) of each lower dummy clamper (104) of the slider (52). An unclamping cylinder (125) for releasing the lock is incorporated.

In the above embodiment, the connecting shaft (6
As shown in FIG. 7, as a method for attaching and detaching the bit (69) to and from the tip of (7), the bit (6) is attached to the tip of the connecting shaft (67).
9) Drill a bit hole (130) that engages the hexagonal portion at the rear end, and arrange a steel ball (131) that can freely enter and exit the bit hole (130). A collar (13) slidably disposed on the outer periphery of the connection shaft (67).
By the operation of 2), the bit (69) is inserted into the groove (69a) formed in the hexagonal portion at the rear end of the bit (69), so that the bit (69) is fixed to the tip of the connecting shaft (67).

The collar (132) is connected to the spring (1).
33) slide downward against the elastic force of the steel ball (1).
If the bit 31 is moved to the outside of the connecting shaft 67, the bit 69 is separated from the tip of the connecting shaft 67 so that the bit 69 can be replaced.

Further, a proximity switch (135) fixed on a second support plate (63) is provided at the rear end of each connecting shaft (67).
And a dog (136) opposed to.

Then, with the reverse rotation of the set screw (26) due to the reverse rotation operation of the bit (69), the set screw (26) rises, and accordingly, the connecting shaft (67) connected to the bit (69) is located. When the quantity is raised, the dog (136) and the proximity switch (135) face each other, and when the proximity switch (135) is turned on, the set screw (26) is detached from the screw hole (27a) of the lower dummy weight (22). , The upper dummy weight (21) and the lower dummy weight (22) can be reliably detected as being separated from each other.

In order to attach the dummy weight (20) to each of the crankpins (3a) to (3e) of the crankshaft (1) by the dummy weight attaching device (10) having the above configuration, first, the lifting table (43) At the lower part, an upper dummy pallet (50) is supported and a slider (52) is supported.
The lower dummy pallet (51) is arranged on the upper part.

Next, a lower dummy weight (22) is set in each lower dummy receiver (101) of the lower dummy pallet (51), and a guide cylinder of a lower dummy clamper (104) protruding from the lower dummy receiver (101). (108) is inserted into the clamp hole (31) of the lower dummy weight (22). In this state, the unclamping cylinder (125) is operated,
The lower dummy weight (22) is held in a locked state on the lower dummy receiver (101) by pushing up the operating rod (109) of the lower dummy clamper (104) and projecting a steel ball on the outer periphery of the guide cylinder (108). I do.

Next, after placing the upper dummy weight (21) on each of the lower dummy weights (22), the elevator table (4)
By lowering 3), the upper dummy pallet (5
0) is lowered, and the bit (69) projecting from the third support plate (64) of the upper dummy pallet (50) and the guide cylinder (78) of the upper dummy clamper (75) are stopped by the upper dummy weight (21). It is inserted into the screw support hole (23) and the clamp hole (30), respectively.

Next, the unclamping cylinder (89) of the lifting platform (43) is extended, and the unclamping plate (8) is extended.
5) is lowered and the operating rod (80) of the upper dummy clamper (75) is lowered to lock the upper dummy clamper (75), and the upper dummy pallet (75) is locked.
And the upper dummy weight (22).

Thereafter, in this state, the upper dummy pallet (5
0) is once raised and the upper dummy weight (21) is separated from the lower dummy weight (22), so that the dummy weight (2) to the dummy weight attaching device (10) is
The setting of 0) ends.

When the setting of the upper and lower dummy weights (21) and (22) on the dummy weight mounting device (10) is completed, the slider (52) is then transferred to the crankshaft where the autoloader (18) is located. To a point, in this position the crankshaft (1) supported on the arm (12b) of the reversing device (12)
Is transferred onto the lower dummy pallet (51) set on the slider (52), and the crank pins (3a) to (3e) of the crankshaft (1) are placed on the lower dummy pallet (51). Each lower dummy weight (22) is fitted.

In this transfer operation, the crankshaft (1) is mounted on the arm (12b) in the raised state by using the autoloader (18), and then the arm (12b) is moved.
The lower dummy pallet (51) on the slider (52) is positioned below the slider (52), and by lowering the arm (12b) in this state, the crankshaft (1) is moved from the arm (12b) to the lower dummy pallet. (51) Transfer to the top.

Next, the slider (52) on which the crankshaft (1) is mounted is attached to the dummy weight mounting device (1).
0) and lowering the elevator (43) again in this state lowers the upper dummy pallet (50) and lowers the upper dummy weight (21) held on the upper dummy pallet (50). It is placed on the dummy weight (22), and the crank pins (3a) to (3e) are sandwiched by the upper and lower dummy weights (21) and (22).

Next, ten nut runners (45) mounted on the lifting platform (43) are driven, and the bit (69) is passed through each universal joint (63), rotary shaft (66) and connecting shaft (67). ) Is rotated forward in the tightening direction, so that the set screw (26) incorporated in the upper dummy weight (21) is rotated forward, and the set screw (26) is connected to the pin nut (27) of the lower dummy weight (22). By screwing into the screw holes (27a) provided, the upper and lower dummy weights (21) and (22) are integrated, and the attachment of each dummy weight (20) to each of the crank pins (3a) to (3e) is completed. I do.

Thus, the dummy weight (20)
Is completed, the unclamping cylinder (89) is shortened, the unclamping plate (85) is raised, and the operating rod () of the upper dummy clamper (75) is turned off. The lock of the upper dummy clamper (75) is released by raising 80).

Next, in this state, if the elevator (43) is raised and the upper dummy pallet (50) is raised, the lock of the upper dummy clamper (75) has been released. The guide cylinder (78) and the bit (69) are separated from the upper dummy weight (21), leaving the crankshaft (1) on which the dummy weight (20) has been mounted on the lower dummy pallet (51).

Thereafter, the slider (5) having the crankshaft (1) for which the attachment of the dummy weight (20) has been completed is completed.
2) is again slid to the crankshaft transfer point, the unclamping cylinder (125) is shortened, the operating rod (109) of the lower dummy clamper (104) is lowered, and the lower dummy clamper (104) is unlocked. The crankshaft (1) is transferred from the lower dummy receiver (101) onto the arm (12b) of the reversing device (12), and the crankshaft (1) is transferred to the first measuring device (13) by the reversing device (12). To the first measuring device (13), mounting the dummy weight (20) on each of the crankpins (3a) to (3e) of the crankshaft (1), and carrying the crankshaft (1) into the first measuring device (13). Can be done automatically.

The transfer of the crankshaft (1) from the lower dummy pallet (51) to the arm (12b) of the reversing device (12) is performed by moving the arm (12b) in the lowered state.
After the slider (52) is slid to the side and the arm (12b) is positioned below the crankshaft (1) on the lower dummy receiver (101), the arm (12b) is raised and the crankshaft (1) is moved. To the lower dummy tray (10
1) to the arm (12b). In this state, if the band upper plate (12a) having the arm (12b) is rotated by 180 degrees, the crankshaft (1) is moved to the first measuring device (1).
You can move to 3).

As described above, when the first attachment of the dummy weight (20) to the crankshaft (1) and the work of loading into the first measuring device (13) are completed,
The currently loaded crankshaft (1) is the first measuring device (1
Until the return of 3), the second crankshaft (1) placed on the arm (12c) of the reversing device (12) is stored in the dummy weight mounting device (10). In the same manner, the work of attaching the dummy weight (20) to the next crankshaft (1) is performed.

Then, when the first crankshaft (1) is returned to the first measuring device (13) again, the first crankshaft (1) is subjected to the first measurement by the action of the reversing device (12). At the same time when the dummy weight (20) has already been attached,
The first crankshaft (1) is connected to the first measuring device (13)
Carry in.

When the first crankshaft (1) is carried out of the first measuring device (13) in this manner, the crankshaft (1) is transferred to the lower dummy receiver set on the slider (52). (101), the lower dummy clamper (104) is locked, each lower dummy weight (22) is clamped on the lower dummy receiver (101), and then the dummy weight mounting device (1) is again mounted.
0).

Next, by lowering the elevator (43) and lowering the upper dummy pallet (50), the bit (69) and the upper dummy clamper (75) projecting from the third support plate (64) are moved. The guide cylinder (78) is inserted into the set screw support hole (23) and the clamp hole (30) of the upper dummy weight (21), and the tip of the bit (69) is fitted to the head of the set screw (26).

Next, the upper dummy clamper (75) is locked, the upper dummy weight (21) and the upper dummy pallet (50) are integrated, and the nut runner (45) is driven in the reverse direction to rotate the universal joint. (6
5) By reversing the bit (69) via the rotating shaft (66) and the connecting shaft (67), the set screw (26) is reversed, and the set screw (26) is screwed into the screw hole (27) of the pin nut (27). 27a), the lower dummy weight (22) and the upper dummy weight (21) are separated.

At this time, the nut runners (45) are rotated in reverse until the rise accompanying the reverse rotation of the set screw (26) of each connecting shaft (67) reaches a predetermined amount and all the proximity switches (135) are turned on. By doing so, the upper and lower dummy weights (21) and (22) of each dummy weight (20) are completely separated.

Thus, the upper and lower dummy weights (2
1) When (22) is separated, the elevator (43) is raised and the upper dummy pallet (50) is raised, so that the upper dummy weight (21) is connected to each crankpin (1) of the crankshaft (1). 3a) to (3e).

Next, the slider (52) having the lower dummy pallet (51) on which the crankshaft (1) from which the upper dummy weight (21) has been separated is placed is placed on the autoloader (18). After sliding to a certain crankshaft transfer point, the crankshaft (1) is moved by the autoloader (18) to the lower dummy pallet (5).
If it is removed from 1) and sent to the next step, the first balance measurement and balance adjustment of the crankshaft (1) is completed.

On the lower dummy pallet (51) from which the crankshaft (1) is taken out, the third crankshaft (1) is placed, and the second crankshaft (1) is mounted on the first dummy pallet (51). The attachment of the dummy weight (20) is performed before returning to the measuring device (13).

After that, since the dummy weight (20) used last time is left in the dummy weight attaching device (10), the dummy weight (20) is set in the dummy weight attaching device (20). No need.

Thereafter, the above operation is continuously repeated, whereby the dummy weight (20) is attached to the crankshaft (1), balance measurement, balance adjustment,
A series of operations such as removal of the dummy weight (20) from the crankshaft (1) can be performed automatically and continuously.

In the above embodiment, when there is a change in the type of the crankshaft (1) to be measured and corrected in the measuring station (11), that is, the same five-cylinder 4
In the case where it is necessary to measure the crankshaft (1) used in the cycle engine also with different pin diameters, piston strokes, radii, and pin phase positions of the crank pins (3a) to (3e), a dummy weight measuring device is required. Remove the upper dummy pallet (50) and the lower dummy pallet (51) from (10), and the upper and lower dummy pallets (50) (51) corresponding to the new crankshaft (1).
Is set on the dummy weight mounting device (10),
The attachment and detachment of the upper and lower dummy weights (21) and (22) to and from the various types of crankshafts (1) can be performed by one dummy weight attaching device (10).

Also, a dummy weight mounting device (10)
If the bit (69) is cracked or chipped during use, the bit (69) may be replaced. If the screw hole (27a) of the lower dummy weight (22) is worn, a pin nut may be used. If only (27) is replaced, the lower dummy weight (22) can be continuously used.

[0097]

As described above, according to the present invention, the dummy weight to be attached to and detached from each crankpin of the crankshaft is divided into upper and lower parts, and both can be integrated by the set screw incorporated in the upper dummy weight. West,

A dummy weight attaching device for attaching and detaching the dummy weight to and from a crankpin of a crankshaft,
An upper dummy pallet having a bit connected to a nut runner for supporting the upper dummy weight to be able to move up and down and for rotating the set screw of the upper dummy weight forward and backward;

The lower dummy weight is supported so that it can move horizontally,
Since the lower dummy weight is constituted by the lower dummy pallet located just below the upper dummy weight and two positions of the crankshaft transfer point,

The mounting and removal of the dummy weight from the crankshaft to the crankpin can be completely automated.

Therefore, at the time of measuring the balance of the crankshaft, a dummy weight corresponding to the inertia force of the piston and the connecting rod is attached to the crankpin of the crankshaft, and the same state as when the crankshaft is incorporated in the engine is reproduced. It is possible to perform an ideal measurement, such as performing measurement in this state, based on complete automation.

Since the upper and lower dummy pallets can be detached from the dummy weight mounting device,
It becomes possible to make the dummy weight mounting device of one stand correspond to various kinds of crankshafts.

Further, since the screw holes to be screwed with the set screws formed on the lower dummy weight used in the present invention can be replaced by replacing the pin nuts, the upper and lower sets can be combined only by the wear of the screw holes. The dummy weight no longer needs to be discarded, and the life of the dummy weight can be extended.

[Brief description of the drawings]

FIG. 1 is a side view showing an entire configuration of a dummy weight mounting device for a crankshaft according to the present invention.

FIG. 2 is a side view showing a lifting platform.

FIG. 3 is a front view showing upper and lower dummy pallets.

FIG. 4 is a partial sectional side view showing upper and lower dummy pallets.

FIG. 5 is a partial sectional side view showing upper and lower dummy pallets.

FIG. 6 is a partial cross-sectional side view showing upper and lower dummy pallets.

FIG. 7 is a partial sectional view showing a mounting structure of the bit.

FIG. 8 is a sectional view showing the structure of an upper dummy clamper.

FIG. 9 is an enlarged cross-sectional view showing the tip of the upper dummy clamper.

FIG. 10 is a partial sectional view showing a dummy weight.

FIG. 11 is a plan view schematically showing a production line on which a dummy weight mounting device for a crankshaft according to the present invention is set.

FIG. 12 is a side view showing a dummy weight mounting device and a reversing device for a crankshaft according to the present invention.

FIG. 13 is a plan view showing a dummy weight mounting device and a reversing device for a crankshaft according to the present invention.

FIG. 14 is a side view showing an example of a crankshaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crankshaft 3a Crankpin 3b Crankpin 3c Crankpin 3d Crankpin 3e Crankpin 10 Crankshaft Dummy Weight Mounting Device 20 Dummy Weight 21 Upper Dummy Weight 22 Lower Dummy Weight 26 Set Screw 40 Body Frame 43 Elevator 46 Nut Runner 50 Upper Dummy pallet 51 Lower dummy pallet 52 Slider 69 bits 75 Upper dummy clamper 101 Lower dummy receiver 104 Lower dummy clamper

Claims (1)

(57) [Claims] 1. A dummy weight attaching device for attaching and detaching a dummy weight composed of an upper dummy weight and a lower dummy weight and integrated by a set screw previously incorporated in the upper dummy weight to each crank pin of a crankshaft, A body frame composed of a plurality of pillars, a lifting platform having a predetermined number of nut runners corresponding to each set screw of the upper dummy weight supported movably up and down on the body frame, and detachably supported below the lifting platform. Further, an upper dummy pallet having a bit engaged with each set screw of the upper dummy clamper for supporting the upper dummy weight and the upper dummy weight and connected to the nut runner, a portion immediately below the upper dummy pallet, and a crankshaft transfer point A slider that horizontally moves between the slider and a lower dummy The dummy weight mounting apparatus for a crankshaft, characterized in that formed by a lower dummy pallet having a lower dummy receiving and under Damikuranpa for the lower dummy weights clamps for site support.