JPS5920920Y2 - Replaceable head quill unit - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a replaceable head tile unit.

When attempting to process different types of workpieces whose machining positions and machining dimensions differ slightly due to differences in machine types, etc., with a single machine unit (quill unit in this invention), the main body part may be left as is. The solution is often to replace only the head part to which the tools are attached.

In this way, if the head portion is appropriately replaced and used depending on the workpiece, there is no need to prepare a dedicated machine for each type of workpiece, which is economically advantageous.

The present invention aims to provide a device that simplifies the replacement work at the time of replacing the head in the above-mentioned head replaceable tile unit, and will be explained below based on the embodiments shown in the accompanying drawings.

In the figure, 1 is a base, 2 is a housing fixed on the base 1, and 3 is a hollow tile that is slidably supported within the housing 2 by caps 4 and 5 attached to the front and rear of the housing 2, respectively.

Inside the housing 2, chambers A and B are formed before and after a protruding portion 3' from which the quill 3 protrudes in the radial direction, and the cylinder is connected to a hydraulic power source (not shown) through piping connection holes A' and B', respectively. The tiles are moved forward and backward by actuators such as.

Inside the hollow part of the quill 3, front and rear and intermediate bearings 6.
7. 8. The tail end of the drive shaft 10 is connected to the motor 13 through gears 11 and 12 incorporated in the gear box G.
A spline hole 14 is formed in the front end.

Further, the quill 3 is connected to the gear box G and the bolt 16.
etc., and a cap 15 is fixed to the front end with bolts 17.

As shown in the second figure, claw pieces 22, 22, and 22, which grip the conically bulging base 21 of the head 20 by using the protrusions 18 provided at three locations around the cap 15, are pivoted by pins 23, respectively. wear.

As shown in the first figure, each claw piece 22 has its rear part bent inward, and a pressing piece 26 is provided between the bent part 24 and the cap 15, and is constantly pressed by a compression spring 25. A cap 4 provided at the front of the housing 2 is provided with a stopper 19 that comes into contact with the bent portion 24 of each claw piece 22 when the tile 3 is retreated beyond a predetermined range.

As shown in FIG. 3, a spindle shaft 27 having a spline groove 27' that engages with the spline hole 14 of the drive shaft 10 is provided in the head 20, and a tool such as a tap or drill (not shown) is attached to the tip of the spindle shaft. is installed.

Further, a plurality of positioning pins 2 are provided on the front surface of the cap 15.
8, and this positioning pin 2 on the other head 20 side.
A positioning hole 129 corresponding to the normal head 20 is provided.
is clamped to the front surface of the cap 15 in a desired posture by the claw piece 22 which is compressed and compressed in the inner diameter direction by the positioning pin 28 and the spring 25.

In FIG. 1, pressure oil is introduced into the rear chamber B side of the housing 2,
This shows a state in which this tile unit is at the forward end position, and when switching the introduction of pressure oil to the front chamber A side from this state, the quill 3
and a head 20 integrated with the quill 3, a gear box G,
The motor 13 and the like are integrally moved back to a predetermined position, that is, the original position, and then stopped.

On the other hand, the power of the motor 13 is transmitted to a tool (not shown) via the gear 12.11, the drive shaft 10, and the spindle shaft 27 even when the tile is moving.

When replacing or removing the head 20, the quill 3 is moved back beyond the original position to the rearmost position.

As a result, the bent portion 24 of each claw piece 22 comes into contact with the stopper 19 as shown by the chain line in FIG. Due to the expansion in the radial direction, the engagement between the base 21 of the head 20 and the claw piece 22 is lost, and the head is held only by the positioning pin 28.

Therefore, when the head 20 is inserted into the hole 29, the positioning pin 28
The cap can be removed from the cap 15 by moving forward until it comes out.

And when installing the separately prepared replacement head,
In other words, if the tile is moved forward after temporary fixing with the hole 29 facing the positioning pin 28, when the contact between the stopper 19 and the new curved portion 24 is removed, the claw piece will be pulled out by the elasticity of the spring 25. 22 rotates as shown by the solid line in FIG. 1 and automatically engages with the base 21 of the head 20 to firmly clamp it.

As described above, according to the present invention, a tile, into which a drive shaft is inserted and supported, is supported in a housing fixed on a base so that it can be moved forward and backward by an actuator, and a head is attached to a cap provided at the front end of the tile. In addition to providing a positioning pin to hold the bulging base, a plurality of claw pieces are pivotally attached around the cap, and a spring is press-fitted between the bent part where the rear part of each claw piece is bent inward and the cap. By pressing, each claw piece is configured to contract in the inner diameter direction and grip the head base, while the spindle in the head is engaged with the drive shaft, and each claw piece provided at the front part of a fixed member such as a housing is configured to grip the head base. Each claw of the tile that retreats beyond a predetermined usage stroke at the stop is expanded in the outer radial direction against the spring and released from the head base, so the head of the tile unit can be replaced. When replacing the bolts, it is much easier and more convenient to replace them than the conventional method of removing and replacing several mounting bolts one by one.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a view taken along arrow C in FIG. 1, and FIG. 3 is a longitudinal sectional view of the head. 1...Base, 2...Housing, 3
... Quill, 10 ... Drive shaft, 15.
... Cap, 19 ... Stopper, 20
...Head, 21...Base, 22...
...Claw piece, 23...Pin, 24...
・Bending part, 25...Spring, 26...
... Push piece, 27 ... Spindle.

Claims (1)

[Scope of utility model registration request] A tile, into which the drive shaft is inserted and supported, is supported in a housing fixed on the base so that it can be moved forward and backward by an actuator, and a positioning pin that holds the protruding base of the head is attached to a cap provided at the front end of the tile. At the same time, a plurality of claw pieces are pivotally mounted around the cap, and each claw piece is pushed in the inner radial direction by the pressure of a spring that is press-fitted between the bent part where the rear part of each claw piece is bent inward and the cap. The spindle in the head is engaged with the drive shaft and retracted beyond a predetermined operating stroke at each stop provided at the front of a fixed member such as a housing. A replaceable head tile unit characterized in that each claw of the tile is expanded in the outer radial direction against a spring to release grip from the head base.