JPH02198764A - Work driver for spider of triport joint - Google Patents

Abstract

PURPOSE:To correctly perform the positioning and holding of a spider by providing two units of V receivers fitting in the two triport shafts of the spider and a dividing device dividing those at a fixed position. CONSTITUTION:Two sets of V receivers 2, 3, 4, 5 for fitting the two triport shafts of a spider 7 are provided at the different position in the peripheral direction of a main shaft 6 on the work driver of the spider 7 of a triport joint, and these two sets of V receivers 2, 3, 4, 5 and a dividing device for dividing are provided as well. The spider 7 can be held at correct position because of the two sets of V receivers 2, 3, 4, 5 being fixed to a face plate. Also, the positional confirmation of the V receivers 2, 3, 4, 5 becomes easy by the dividing rotation of the face plate and the spider 7 can be positioned correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a work driver for tri-port shaft grinding of a spider of a tri-port joint.

``Prior art'' When grinding the tri-port shaft of a spider without supporting it at both centers, the outer diameter of three places is ground as shown in Fig. 6. Face plate 1 attached to the 6 main spindles when grinding in the order of symbols
If the tri-port shaft 8 is supported by the supports 2 and 6 fixed to the holder 2 and 6, the tri-port shafts 9 and 10 with machining allowance will be fitted into the supports 2 and 3, respectively, when the tri-port shaft 8 is being ground. 8 is pressed against the tailstock center 12 without tilting. In this state, rotate the main 1116 and
The tri-port shaft 8 is ground by rotating the tri-port shaft 8 and causing the grindstone 24 to act. Next, when grinding another tri-port shaft 9, the result will be as shown in FIG. That is, since the tri-port shaft 8 has already been ground, it is thinner than the tri-port shaft 10, so when it is fitted into the V receivers 2 and 3, the center hole 11 of the tri-port shaft 9 will be in line with the tailstock center 12. Grinding is not possible.

As a conventional example that solved these problems,
There is an invention disclosed in Publication No. 1245.

This conventional example is equipped with a pair of receivers having V grooves that engage with the two tri-port shafts of the spider that constitute the tri-port joint, and a main shaft that rotationally drives the spider, and one other tri-port shaft. The tailstock center fits into a center hole drilled in the center of the tip of the tailstock and presses the spider toward the main shaft. This is a chuck device for a tripod joint trunnion characterized by having a movable trunnion.

``Problems to be Solved by the Invention'' In this conventional example, ■ a device that allows one of the receivers to move relative to the other V receiver is mounted on a face plate 35 attached to the main shaft 50, as shown in FIG. A crank-shaped movable V receiver 36 with a V groove on one side is attached to the axis of the main shaft 50 with the shaft 39 at an intersecting position, and an arm portion 56a to which the V receiver 36 of the movable V receiver 36 is fixed is provided in the main shaft. Press the arm part with the piston rod 3S of the pressure cylinder and press it against the face plate 3.
It is made to be caught by a stopper 41 provided with 5#.

In the conventional example, the V receiver 36 was made movable as described above. (1) The number of parts was large and the configuration was complicated.

(2) Since the amount of displacement of the V-groove portion of the movable V-receiver is small, it is difficult to provide a means for confirming that the movable stopper has moved. Also, it is difficult to provide means for detecting displacement of the movable receiver because it is supported on a rotating main shaft. Therefore, it is not possible to check if the movable V receiver is not in the correct position due to the required displacement due to a foreign object being caught. As a result, the tri-port axis (trunnion axis) will not be formed at an accurately indexed position of 120°.

(3) The fluid pressure cylinder provided on the main shaft must press the movable V receiver with a force greater than the pressing force exerted by the center of the tailstock on the movable V receiver, and the fluid pressure cylinder is required to exert a large force. Therefore, the hydraulic cylinder has no choice but to rely on the hydraulic cylinder, and in order to move heated liquid such as pressure oil into and out of the spindle head, it causes thermal displacement of the spindle.

Furthermore, if the hydraulic pressure is not maintained for a certain period of time, the amount of deformation of each moving part will change, causing a positional shift of the movable V receiver.

(4) Machining of the spindle is difficult because the spindle head is equipped with a hydraulic cylinder.

SUMMARY OF THE INVENTION An object of the present invention is to provide a work driver for a tri-port joint spider that eliminates the problems of the prior art.

"Means for Solving the Problems" The present invention is provided with a V receiver into which two tri-port shafts of a spider constituting a tri-port joint are fitted, and a main shaft for rotationally driving the spider and one other tri-port shaft. A tailstock center that fits into a center hole drilled at the tip of the shaft and presses the spider toward the main shaft, wherein two sets of the V receivers are provided at different positions in the circumferential direction of the main shaft,
This work driver for a tri-port joint spider is characterized in that it is provided with an indexing device for indexing the two sets of V receivers to fixed positions.

"Operation" First, fit the two tri-port shafts of the tri-port joint spider into a set of V receivers, and press the tailstock center into the center hole of the shaft end of the other tri-port shaft. Then, grind the other tri-port shaft, index the spider, and index the spider mounting position of the other pair of receivers to separate the ground tri-port shaft and the unground tri-port shaft. Insert the shaft into the remaining pair of V receivers, press the large center tailstock center of the tri-port shaft that is not fitted into the receiver, and grind the tri-port shaft with the tailstock center fitted. Finally, index the spider further and index the first set of ■receivers to the spider installation position.
Insert a set of ground tri-port shafts into the first set of V receivers used, fit the tailstock center into the center hole at the end of the unground tri-port shaft, and press it. Grind the port shaft.

"Embodiments" Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the face plate. Two sets of receivers 2, 3 and 4, 5 are fixed to the face plate 1 at different positions in the circumferential direction, for example, 90 degrees apart. ■The receivers 2, 5, and 4.5 are each provided with a V-groove in the radial direction (see Fig. 2 (al)). Fig. 2 is a longitudinal sectional view showing the whole including the side view of Fig. 1. Yes.■
The receivers 2.3 and 4,5 are arranged on the same radius from the center of the main shaft 6, respectively. The tri-port shafts 9 and 10 of equal size of the spider 7 of the tri-port joint are
When inserted into the shaft end of the remaining tri-port shaft 8, the center hole 11 at the center of the shaft end coincides with the heart valve stand center 12, and the center hole 11 and the center of the tri-port shaft 8 are on the center line of the main shaft B. ing. - Receiver 4 is the same as V receivers 2 and 3.

■Receiver 5 is for fitting a ground tri-port shaft, ■Inserting an unground tri-port shaft into receptacle 4,
■ When the ground tri-port shaft is fitted into the receiver 5, the center hole 11 of the remaining tri-port shaft is aligned with the heart valve stand center 12.
The grooves are shallow.

The swing table 13 is provided with a heart valve stand 15 coaxially with and apart from the workpiece headstock 14 so as to be movable toward and away from the workpiece headstock 14 . The spindle 6 is mounted on a headstock main body 17 by a bearing 16, and a face plate 1 is fixed to the spindle head. Main shaft 6
A V-pulley 18 is fixed to the rear end of. V pulley 1
8 is driven by an electric motor (not shown) via a belt transmission. Although not shown, a main shaft fixed position stopping device is provided for stopping the main shaft 6 at a fixed position when the main shaft 6 is stopped on the pulley 18 side or the above-mentioned motor side.

A hydraulic rotary cylinder 19 with a stopper having a rotation angle of 90 degrees is fixed to the V-pulley 18, and its output shaft is connected to a pivot shaft 20 that passes through the center hole of the main shaft 6. 21 is a rotary pipe joint for supplying pressure oil to the hydraulic rotary cylinder 19.

The face plate 1 consists of a main plate 22, a back plate 25, and a portion connecting these. The back plate 23 fitted and fixed to the main shaft 6 is disk-shaped and has a cylindrical recess 25a, and a guide 22a, which is a circumferential protrusion on the outer periphery of the disk-shaped main plate 22, is loosely fitted into the cylindrical recess 25a. is prevented from escaping in the axial direction by an annular retaining plate 26 connected to the back plate 23 with a port 25. A cylindrical fitting recess 22b provided on the main plate 22 is rotatably slidably fitted into a relatively small diameter cylindrical fitting protrusion 23b provided on the back plate 23. The pivot shaft 20 is fixed to the main plate 22.

The operation of the above configuration will be explained. Tri-port shafts 8, 9, and 10 of the same size have the same grinding allowance, and a spider 7 with a center hole 11 bored at the shaft end of the tri-port shafts 8, 9, and 10 respectively. , 10 grinding processes.

First, insert the two tri-port shafts 9゜10 into the receivers 2 and 3, and the center hole 1 of the remaining tri-port shaft 8.
1 is on the axis of the heart valve stand center 12, so when the heart valve stand center 12 is moved forward, it will become as shown in FIG. When the main shaft electric motor is energized and the pulley 18 is rotated, the main shaft 6 rotates and the face plate 1 rotates together, so the spider 7 is driven from the V receivers 2 and 6, and the spider 7 rotates.

At this point, the grindstone 24 is activated to grind the tri-port shaft 8. The main shaft 6 of the grinding machine is stopped at the position shown in FIG. 3 by a fixed position stopping device.

Next, the heart valve stand center 12 is moved backward, and the spider 7 is moved back to the face plate 1.
The spider 7 is indexed and rotated 120 degrees clockwise automatically (description will be omitted), and the rotating cylinder 19 is energized to rotate the main plate 22 of the face plate 1 via the pivot shaft 2a.
is rotated 90 degrees counterclockwise in Figure 1, ■Receiver 2
The V receivers 4 and 5 are rotated to the position shown in FIG. When the spider 7 is now moved to the left, the ground tri-port shaft 8 is fitted into the shallow ■ receiver 5, the unground tri-port shaft 1o is fitted into the ■ receiver 4, and the remaining tri-port shaft 9 is fitted. The center hole 11 is the heart valve stand center 12
come to a position where it can match. At this point, the heart valve stand center 12 is moved forward and fitted into the center hole 11 of the tri-port shaft 9, thereby pressing the spider 7 toward the V receivers 4 and 5. When the main shaft 6 is rotated to rotate the spider 7 and the grindstone 24 is applied, the tri-port shaft 9 is ground.After grinding, the main shaft is stopped at the position shown in FIG. 4 by the main shaft fixed position stop device.

Retract the heart valve stand center 12 again, and move the spider 7 back to the face plate 1.
The main plate 22 of the face plate 1 is rotated 90 degrees clockwise in FIG. ■The receivers 2 and 3 return to their starting positions (Fig. 5). When the spider 7 is now moved to the left, the ground tri-port shafts 8 and 9 will fit into the V receivers 2 and 3.
The center hole 11 of the remaining tri-port shaft 10 is located on the center line of the heart valve stand center 12. The heart valve stand center 12 is advanced and inserted into the center hole 11 of the tri-port shaft 10, and the spider 7 is placed in the V receiver 2. S to rotate the main shaft 6 and grindstone 2.
4 to grind the tri-port shaft 10. After grinding, the raw shaft 6 is stopped at a fixed position, the heart valve stand center 12 is moved back,
Remove the spider 6 by moving it away from the face plate 1.

In this embodiment, two sets of V receivers are indexed using a hydraulic rotary cylinder 19.
However, the main shaft position may be detected by an encoder or the like, the main shaft may be directly indexed by 90 degrees, and the face plate may be fixed to the main shaft.

〔Effect of the invention〕

As described above, the present invention has (1) two sets of V receivers fixed to the face plate, so the spider can be held at an accurate position.

(2) Since the face plate is indexed and rotated by 90 degrees, it becomes easy to confirm the position of the receiver, and the reliably determined tri-port shaft is fitted into the predetermined V receiver, allowing accurate positioning of the spider.

(3) ■Since there are two sets of receivers, there is less wear on the V receivers and durability.

(4) ■ Since two sets of receivers are arranged in the circumferential direction, there is no need to provide a hydraulic cylinder inside the main shaft, and the structure is simple and easy to manufacture.

There are other effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of the face plate of the embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the entire device, Fig. 2 (at is a view taken in the direction of arrow A in Fig. 2, and Figs. 3 to 5 are views of the operation FIGS. 6 and 7 are side views of conventional examples, and FIG. 8 is a vertical sectional view of another conventional example. 1. Face plate 2.j4,5 ..V receiver 6.・Spindle
7-・Spider 8,9,10・・Tri-port shaft 11・・Center hole 12・・Heart valve stand center 13・・
Rocking table 14・-Workpiece headstock 15・-Tailstock 16
・・Bearing 17・・Spindle main body 1B・・V pulley
19...Hydraulic rotating cylinder 20...Swivel axis 21...
Rotary pipe joint 22...Main plate 22a...Guide 22b...
・Inner cylinder recess No. 25 - Back plate 23a... Cylindrical recess 23
b...Cylindrical fitting protrusion 24...Whetstone 25...Bolt
26... Holding plate 36... Piston rod 35... Face plate 36... Movable V receiver S6'... ■Receiver S6a fist...
Arm part 39...Axis 41...Stopper 50...Main shaft.

Claims (1)

[Claims] 1. Equipped with a V-receiver into which the two tri-port shafts of the spider that make up the tri-port joint fit, and which fit into the center hole drilled at the tip of the main shaft that rotationally drives the spider and the other tri-port shaft. and a tailstock center for pressing the spider toward the spindle, wherein two sets of the V receivers are provided at different positions in the circumferential direction of the spindle, and the two sets of V receivers are indexed to fixed positions. A tri-port joint spider work driver characterized by being equipped with an ejection device.