JPS5852043Y2 - Workpiece automatic rotation indexing device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic workpiece rotation and indexing device that rotationally indexes a workpiece such as a camshaft having a gear portion to a specific angular phase prior to machining, and its purpose is to The key is to rotationally index the teeth or tooth grooves of the workpiece to a specific angular phase with high precision.

Generally, a workpiece such as a camshaft must be driven while being rotationally indexed to a specific angular phase relative to the main shaft, and this requires manual adjustment of the mounting angle of the driving dog relative to the workpiece. It was a hassle.

For this reason, recently, attention has been paid to the fact that this workpiece has a gear portion at one end thereof, and so-called automatic drive devices are being developed in which a drive arm is engaged with the gear portion from the main shaft side to drive the workpiece.

The most important aspect of this device is the smooth engagement of the drive arm and the gear section, which requires accurate rotational indexing of the workpiece to a predetermined angular phase.

However, conventionally, the rotation indexing of this type of workpiece was done manually by pressing a template against the black skin cam part, so highly accurate rotation indexing could not be expected, and the tooth groove of the gear part However, this method could not be applied to the above-mentioned automatic drive device because there is a risk that the drive arm may malfunction.

The present invention was developed in response to these conventional demands, and its features include a rotary plate provided in the rotary drive system of the indexing gear that meshes with the gear part of the workpiece; Engaging teeth are formed in a relationship that rotates once per pitch when the indexing gear is rotated by one pitch, and after the indexing gear is rotated to rotationally index the workpiece, the retaining teeth of the rotating plate are further formed. By engaging the deviation correction member, the positional deviation of the gear portion of the workpiece is corrected, and highly accurate rotation indexing is made possible.

Below, embodiments of the present invention will be described based on the drawings.
In the figures and FIG. 2, reference numeral 1 denotes a fixed base, and a transfer arm 2 is pivotally supported on this fixed base 1 so as to be swingable.

A receiver 3 for supporting a workpiece W, such as a camshaft, having a gear portion Wa is formed at one end of the transfer arm 2, and the intermediate portion of the transfer arm 2 is connected to a piston rod 64 of a cylinder device 63. At a loading position P1, a receiver picks up a workpiece W transported by a motor (not shown) and transports it to a standby position P2.

Boards 4 and 5 are fixed on a fixed base 1 of an octopus, and a cylinder device 6 is fixed to the lower surface of one of the boards 4.

An elevating body 8 is fixed to the piston rod 7 of the cylinder device 6, and is configured to transport the workpiece W at the standby position P2 to the rotation index position P3.

A pair of supports 9 and 10 are installed facing each other on the upper surface of the substrate 4, and centers 11 and 1 are provided on the supports 9 and 10.
Blocks 13, 14 are fixed which slidably guide and hold 2.

The centers 11, 12 are connected to the piston rods 17, 18 of the cylinder devices 15, 16, respectively, so that the workpiece W transported to the rotary index position P3 is centrally supported from both sides.

At this time, the pressing force of the cylinder device 15 is
This difference in pressing force positions the gear portion Wa of the workpiece W at an axial position where it can engage with an index gear 32, which will be described later.

On the other hand, a pair of pilot pars 2L22 are fixed on the substrates 4, 5 by platens N9, 20, and a box 23 is slidable on the pilot pars 21, 22 in a direction perpendicular to the axis of the workpiece W. The cylinder device 24
It is designed to move forward and backward.

Holders 25 and 26 are fixed to the front part of the box body 23, and a rotating shaft 27 is supported on the holders 25 and 26 so as to be rotatable around an axis perpendicular to the axis of the pilot par 2L22. There is.

As shown in FIG. 3, a pair of swinging arms 28 and 29 are swingably supported on this rotating shaft 27 at a constant interval, and a drive gear 30 is wedged between the swinging arms 28 and 29. It has been stopped.

The swing arms 28 and 29 extend upward with the rotation shaft 27 as a fulcrum, and a transmission gear 31 that meshes with the drive gear 30 and an index gear 32 of the same module as the gear portion Wa of the workpiece W are provided at the intermediate portion thereof. It is rotatably supported by a pivot 33, and a movable rod 35 is connected to the tip by a connecting pin 34.

This movable rod 35 is attached to the box body 23 as shown in FIG.
The rocking plates 28, 29 are maintained in a vertical position by a nut 36 and a spring 37 which are loosely fitted into the side plates and located on both sides thereof.

A drive shaft 38 is disposed within the box body 23 and is connected to the pilot par 2.
1.22 and is rotatably supported about an axis parallel to the 1.22.

A bevel gear 39 is fixed to the tip of this drive shaft 38,
This bevel gear 39 corresponds to the bevel gear 4 on the rotating shaft 27.
It is meshed with 0.

A pinion gear 41 is rotatably supported at the center of the drive shaft 38, and a cylinder device 4 is attached to the pinion gear 41.
A rack shaft 43, which is moved forward and backward by 2, is engaged with the rack shaft 43.

A one-way clutch 44 is interposed between the pinion gear 41 and the drive shaft 38, so that only one-way movement of the rack shaft 43 is transmitted to the drive shaft 38.

A rotary plate 45 is further wedged on the drive shaft 38.

As shown in FIG. 4, this rotating plate 45 has engagement teeth 46 formed on its outer circumferential surface that rotate by one pitch when the index gear 31 rotates one pitch. A pair of displacement correction members 48 and 49 pivotally supported above by a pivot 47 are engaged with each other.

Long grooves 50 and 51 are formed in each of the deviation correcting members 48 and 49, and an engaging pin 53 on the actuating rod 52 is engaged with the long grooves 50 and 51, respectively.

Therefore, when the actuating rod is moved forward and backward by the cylinder device 54, the displacement correction member 48.49 sandwiches the two retaining teeth 46.46 of the rotary plate 45 from both sides by the action of the long groove 50.51, and It is designed to correct positional deviations.

A mounting bracket 55 is fixedly mounted on the substrates 4' and 5, and a holding table 56 is fixedly mounted on this mounting bracket 53.

Two guide rods 57, 58 are fixedly installed on this holding table 56, and the guide rods 57, 58 and the measuring device 59 are guided so as to be movable in a direction parallel to the moving direction of the box body 23. .

This inspection device 59 rotates and indexes the workpiece W to a specific angular phase, and the tween 60 detects the reference engagement portion w of the workpiece W.
When engaged with b, it outputs an electrical signal and stops the rotational indexing of the workpiece W, and except during inspection, the cylinder device 61 moves it away from the rotational indexing position P3, and the tween 60 is It has been separated from the workpiece W.

Note that 62 is a loader that transports the workpiece W after rotational indexing to the next process.

Next, to explain the operation of clicking the button on the above configuration, the figure shows a state in which rotation indexing has been completed, and the workpiece W has already been gripped by the loader 62, and the centers 11 and 12 have been moved by the cylinder devices 15 and 16, respectively. is in a backward state.

At this time, the workpiece W to be rotated next is already positioned at the standby position P2, and at the same time the workpiece W whose rotational indexing has been completed is transported to the next process by the loader 62.
The elevating body 8 is raised by the cylinder device 6, and the workpiece W supported by the receiver 3 of the transfer arm 2 is rotated to the index position P.
Transport to 3.

At the same time as the conveyance is completed, the cylinder devices 15 and 16 advance the centers 11 and 12, and the workpiece W is supported at the center from both sides.

At this time, the pressing force of the cylinder device @15 is
The workpiece W is positioned at a constant axial position.

At the same time as the workpiece W is supported at the center, the cylinder device 61
The inspection device 59 is moved forward, and its filler 60 engages with the workpiece W.

At the same time, the box body 23 is advanced by the cylinder device 24, and the index gear 32 comes into contact with the gear portion wb of the workpiece W just before the forward end of the box body 23.

As a result, the swing plates 28 and 29 swing rearward about the rotating shaft 27, and as a result, the spring 37 is slightly compressed, and the repulsive force causes the index gear 32 to firmly engage the gear portion wb.

In such a state, the rack shaft 43 is advanced by the cylinder device 42 to rotate the pinion gear 41, and the one-way rotation is transmitted to the drive shaft 38 via the one-way clutch 44, and from the drive shaft 38 to the bevel gear 39. ,4
0 is transmitted to the indexing gear 32 via the rotating shaft 27, the drive gear 30, and the transmission gear 31.

As the indexing gear 32 rotates, the workpiece W is rotated and indexed while being supported at the center.

At this time, the tween 60 of the inspection device 59 is engaged with the workpiece W, and the reference engagement portion wb of the workpiece W is engaged with the tween 60.
When it matches, it emits an electrical signal.

As a result, the operation of the cylinder device 42 is stopped, and the workpiece W is rotationally indexed to a predetermined angular phase.

The reference holding portion wb is a phase reference for the cam portion We to be ground, and does not have a specific phase relationship with respect to the gear portion Wb.

Therefore, even if the workpiece W is rotationally indexed using this reference holding portion wb as a reference, the gear portion wb is not necessarily rotationally indexed to a specific angular phase.

Therefore, after the above operation, the cylinder device 54 is further operated to move the operating shaft 52 forward, and as a result, the pair of deviation correction members 48, 49 are moved between the two engaging teeth 46, 46 of the rotary plate 45 by the action of the long grooves 50, 51. grip from both sides.

This rotary plate 45 is connected to the index gear 32 as described above.
Since engagement teeth 46 are provided in the drive system and are formed on the outer circumferential surface thereof to rotate one pitch in the same way when the index gear 32 rotates one pitch, if there is a deviation in the angular phase, This rotating plate 45 is also shifted.

Therefore, the rotation plate 45
The rotating plate 45 is rotated by the amount of the deviation, and this rotation is transmitted to the indexing gear 32 in the same manner as described above, and as a result, the gear portion Wa of the workpiece W is rotated in an accurate angular phase. be indexed.

This rotation also rotates the cam portion We of the workpiece W, but this rotation is slight and within the range of the grinding allowance, so there is no problem.

At this time, the compartments of the cylinder device 42 are brought into communication with each other, and do not interfere with the rotation of the index gear 42.

Also, while this workpiece W is being rotationally indexed, the elevating body 8
is lowered by the cylinder device 6 at the standby position P2t, and l
The transfer arm 2 swings at position 1 shown in the imaginary line to receive the workpiece W transported from the previous process, and swings again at the original position in preparation for the next rotational indexing.

At the same time as the rotation indexing of the workpiece W is completed, the inspection device 59 is moved back by the cylinder device 61, and at the same time, the box body 23 is moved back by the cylinder device 24, and the indexing gear 32 is moved from the gear portion Wa of the workpiece W. break away.

When the box body 23 moves backward at the backward end 1, the rack shaft 43 is moved backward by the cylinder device 42, and the displacement correction members 48 and 49 are similarly opened outward by the cylinder device 54.
Ready for the next rotational indexing.

At the same time, the loader 62 descends, grips the workpiece W whose rotational indexing has been completed, and then returns the workpiece W to the center 11.12.
is retracted by the respective cylinder devices 15 and 16, the loader 62 transports the workpiece W to the next process while maintaining the angular phase of the workpiece W, and also loads a new workpiece W to the rotational index position P3 in the same manner as described above. is transported, and rotational indexing of the next workpiece W is started again.

In this embodiment, after rotation indexing is performed at this rotation indexing position, it is transported to the next process, that is, a processing machine, but it can also be used for rotation indexing within a processing machine.

As mentioned above, the present invention provides a rotating plate in the rotational drive system of the indexing gear, and this rotating plate has one indexing gear attached to it.
Engaging teeth are formed that rotate by one pitch when the plate is rotated, and a deviation correction member is engaged with the engagement teeth of the rotating plate, so that the phase deviation of the gear portion of the workpiece is corrected. Accurate rotational indexing is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front sectional view of the device of the present invention, FIG. 2 is a sectional view of FIG. Fig. 4 is a large cross-sectional view taken along the line IV--IV in Fig. 1; 11.12...Center, 23...Box body, 24...
Cylinder device, 27... Rotating shaft, 30... Drive gear, 31... Transmission gear, 32... Index gear, 38...
... Drive shaft, 41 ... Pinion gear, 42 ... Cylinder device, 43 ... Rack shaft, 45 ... Rotating plate, 48, 49 ... Misalignment correction member, 59 ... Inspection device .

Claims (1)

[Scope of utility model registration request] A device for rotatably supporting a workpiece having a gear portion, an indexing gear of the same module as the gear portion of the workpiece, and moving the indexing gear forward and backward to move the indexing gear to the gear portion of the workpiece. a device for locking and releasing the indexing gear at a rotational drive system; a measuring device that detects that the indexing gear has been rotated and stops the rotation of the indexing gear; and a detection device that is installed in a rotational drive system of the indexing gear and rotates one pitch when the indexing gear is rotated one pitch. A workpiece comprising: a rotating plate having engaging teeth; and a deviation correction member that engages with the engaging teeth of the rotating plate to correct deviation of the engaging teeth with respect to the specific angular phase. Automatic rotation indexing device.