JPS5943070Y2 - Holding device for conveying the outer member of constant velocity joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding device that has a straight groove in its inner diameter portion and holds a component whose directionality must be maintained.

More specifically, there are a plurality of balls, etc. that are engaged with the inner diameter part and expand and open by the sliding movement of a tapered cam that is compressed by one, and a plurality of clamp arms that are pivotally supported and that open and close to hold the outer diameter part at their tips. and a sliding member that engages with the taper cam and the clamp arm to drive the phantom, and the inner and outer diameters of the part are reliably held with one operation using two drive sources, and it is easy to use. ,
The present invention relates to a holding device that is small and lightweight.

Conventionally, parts such as the outer part of a constant velocity joint have an axial groove in the inner diameter that curves inward at the open end. It engaged with the curved end of the groove just by expanding it, and it did not come out.

However, when used for something with straight grooves,
It is not possible to lock the ball simply by expanding it from the inside, and the workpiece is pulled out and meets the ball.

For this reason, it is necessary to hold the inner and outer diameters, but in general, when trying to hold the inner and outer diameters, the above-mentioned workpieces that require maintaining directionality require both a positioning member and a holding member. When considered as a conveyance chuck device, if both are provided individually, the device will become larger, the weight will increase, the incidental equipment will become larger, and both drive devices will be required individually, making the structure complicated. At least two operations, a positioning operation and a holding operation, are required, which increases cycle time and makes it difficult to perform efficient work.

The present inventor devised the present invention mainly to effectively and rationally solve the above-mentioned problems in obtaining a workpiece positioning and holding device such as a constant velocity joint.

The purpose of the present invention is to use a plurality of balls, etc., which engage grooves in the inner diameter part and expand and open by the sliding movement of a tapered cam that is compressed by one. It consists of a plurality of clamp arms, a sliding member that engages with and drives the tapered cam and the clamp arm, and a drive source that drives the sliding member. The inner and outer diameters of parts can be held and positioned reliably, and the parts can be held and transported efficiently.
It is an object of the present invention to provide a holding device that can be achieved with a small and lightweight device.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of the holding device, with the upper half showing the holding state and the lower half showing the open state, and FIG. 2 is a partial sectional view taken along line 2-2 in FIG.

The workpiece W1 of this example is a joint member of a constant velocity joint,
A radial groove W3... is formed in the axial direction in the semicircular bowl-shaped case front 2 at the tip of the shaft W1.The groove W3... is formed straight toward the open end, and there is a cage inside (not shown). Inside the ball held by.

The holding device 1 is held by a transfer arm 2, and a body 3 is provided laterally protruding from the lower part of the arm 2. The body 3 has a cylinder portion 3a with an axial through hole formed in the center thereof. A large-diameter portion 3b is formed at the tip of the window 3c, and the large-diameter portion accommodates and holds the ball 4 in an expanded and half-submerged state.
In the illustrated example, three balls 4 are arranged radially at equal intervals, and form a clamp on the inner diameter portion.

A rond-shaped cam member 5 that is slidable in the axial direction is fitted into the cylinder portion a, and a tapered cam portion 5a that is highly inclined toward the tip is formed at the tip of the cylindrical portion, and this portion 5a has a diameter It faces the inner diameter part of the large part 3b.

The cam member 5 is short, and the tip 6a of the operating rod 6 is slidably fitted into the axial hole 5b at the center of the cam member 5, and the spring receiving washer 7 at the tip of the tip 6a and the large diameter axial hole A coil spring 8 is wound and compressed around the rod tip 6a between the rod tip 6a and the bottom of the portion 5c, and elastically biases the cam member 5 rearward, that is, to the right in FIG.

A protrusion 6b that contacts the rear end of the cam member 5 in an unclamped state is provided on the outer periphery of the intermediate portion of the rod 6, an engagement recess 6c is provided on the rear axis of the protrusion 6b, and the rear of the recess 6c serves as the front end of the large diameter portion 6d. A cam portion 6e is formed.

Vertical holes 3d are provided at the rear of the fuselage 3 at two locations, upper and lower in the illustrated example, and the bases of outer diameter clamping arms 90 are pivotally connected to these with pins 9a, and each arm 9 is approximately T-shaped. One T-shaped part 9b engages with the recess 6c, and the other part 9c engages with the tip of the depressor 10 attached vertically to the transfer arm 2. A bushing rod 10b with a buckle is provided in a hole 2a provided in the transport arm 2 and is biased forward by a coil spring 10a.

The tip is provided with an inverted claw 9d.

A drive cylinder unit 11 is attached to the transfer arm 2 adjacent to the above-described body 3, and the piston rod lla of the unit 11 is pivotally supported at its intermediate portion by a pin 2c on a platen 2b protruding from the rear of the arm 2. The other end 12 of the link 12 is pivotally supported by one end of the link 12, the elongated hole 12a, and the pin 11b.
b engages with an engaging portion 6f at the rear end of the rod 6.

In the drawing, reference numeral 13 denotes a receiving seat that elastically receives the workpiece by abutting against the end face of the workpiece W when the workpiece W is set.

Next, to explain its functions and effects in detail, the cylinder unit 1
1, the tip 12b of the link 12 swings clockwise in FIG. 1, causing the operating rod 6 to move forward to the left in the figure. The tapered cam portion 5a moves forward without moving backward even by the action of the spring 8, and the ball 4 is movable toward the center and can be transferred.

The retaining end 9b of the clamp arm 9 engaged with the concave portion 6c of the operating rod 6 is pushed forward by the cam portion 6e, and the other end 9b is pushed forward by the cam portion 6e.
c resists the elastic force of the bushing rod 10b and retreats.

The clamp arm 9 pivots in the direction in which the claw portion 9d opens, and the first
Maintain the state shown in the lower half of the diagram.

Fit the inner diameter part into the tip of the body 3 of the holding device 1 with the volatilization end of the case W2 of the workpiece W as the head, and fit the groove W3... into the ball 4.
Adapt it to.

Subsequently, the cylinder unit 11 is driven to move the rod 11a backward, the link 12 swings counterclockwise, and the operating rod 6 is moved backward to the right in the figure.

As a result, the protrusion 6b retreats, and the cam member 5 becomes able to slide rearward, and as the washer 1 retreats, the spring 8 is contracted and the load increases, causing the cam member 5 to retreat and be guided by the tapered cam portion 5a. The ball 4 expands and protrudes into a half-submerged state.
It comes into contact with the inner diameter groove W3 of the workpiece W and clamps the inner diameter part.

At the same time, as the concave portion 6c moves backward, the engaging portion 9b of the clamp arm 9 is released from the restraint by the cam portion 6e, the other end 9c is pushed by the bushing rod 10b, the claw portion 9d swings in the closing direction, and the claw portion 9d elastically contacts and clamps the outer diameter portion of the case W2.

This is shown in the upper half of Figure 1. The above operations are performed using the operating rod 6.
The sliding movement of the workpiece W is carried out in conjunction with each other as one movement, and after holding, the transfer arm 2 moves and holds the workpiece W while maintaining its directionality.
Transported to the next station, where cylinder unit 1
1 is reversely operated, the workpiece is unclamped.

In the illustrated example, a constant velocity joint is used as the workpiece, but the workpiece is not limited to this, and can be used for various types of workpieces as long as it is necessary to maintain the inner and outer diameters.

As is clear from the above, according to the present invention, the inner and outer diameters can be simultaneously held in one operation by sliding the operating rod by a driving device such as a single cylinder unit,
Positioning and holding a workpiece with an inner diameter groove are simultaneously linked, and the workpiece is held and released in a short period of time.The cycle time is short, and work can be performed efficiently. It is simple to connect with the positioning mechanism and consists of these elastic force means, and it has many advantages such as the device can be made smaller and lighter, and reliable operation can be expected, and it has great practical effects. It is.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical side view, and FIG. 2 is a sectional view of the main part taken along line 2-2 in FIG. In the drawing, W is the workpiece, W3 is the groove, 4 is the inner diameter holding member, and 5 is the workpiece.
8 is a pressure means, 6 is a sliding member, 9 is an outer diameter holding member, 10 is a pressure means, and 11 is a drive device.

Claims (1)

[Claims for Utility Model Registration] An operating rod 6 that is slidably supported by the fuselage 3 and has a locking recess. The cam member 5 is elastically biased in one direction in the sliding direction of the operating rod 6, and the cam member 5 that engages with and slides with the operating rod 6 on the other side, and the inner diameter portion of the component to be held. A plurality of inner diameter holding members 4 which can be freely fitted into grooves etc. and are moved to expand and open by the cam member 5; a plurality of outer diameter holding members 9 that engage with the engagement recesses of and swing in a direction in which the claws expand by engaging with the operating rod 6 as the operating rod 6 slides toward the other side; The outer part of the constant velocity joint is composed of a single drive device that drives the operating rod 6, and has a straight groove in the inner diameter part of the transfer arm 2, which is disposed opposite to the open end of the component to be held. Holding device for transporting parts.