JPH07223139A - Universal attachment - Google Patents

Abstract

PURPOSE:To easily and quickly set an accurate and small angle by establishing a relative space between angle setting elements for a base end body case and a forward end body case. CONSTITUTION:The space X of each angle setting element 56 for a base end body case 12 and the space Y of each angle setting element 58 for a forward end body case 14 are established, so as to satisfy the expression where (n) is a natural number equal to or above 2. In other words, a difference between X and Y can be expressed as Y-X=Y-[(n-1)/n]Y=Y/n. An angle fixing means 60 is provided at the matching position of both angle setting elements 56 and 58 for establishing the angles of both cases 12 and 14. An angle, therefore, can be indexed for every angle having a smaller space Y/n than the spaces X and Y actually used at a machining process. Provided that X=10 degrees, Y=1 degree and n=11, for example, Y/n becomes equal to 1. That is, an angle can be indexed at a smaller angular space than the actually applied angle spaces of 10 and 11 degrees.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal attachment for mounting a tool on a spindle in a machine tool such as a milling machine, and more particularly to a universal attachment that is precise and capable of fine angle indexing.

[0002]

2. Description of the Related Art Conventionally, there is a milling machine or the like in which a tool is attached to a spindle through a swivel type or swing type attachment, that is, a universal attachment, in order to enable machining of an inclined surface.
For example, in Japanese Utility Model Laid-Open No. 61-78538, a base main body and a distal end main body are rotatably connected with each other about a machine spindle, that is, a joint axis that is orthogonal to a central axis of a spindle head. There is disclosed a universal attachment in which the mounting angle of a tool mounted on the tip side main body can be freely changed within the same plane, that is, a two-dimensional plane.

[0003]

However, such a conventional universal attachment is, for example,
There is a problem in that the angle of the tool with respect to the main shaft of the machine body cannot be set at a fine angle interval such as a degree interval, and a precise cutting operation cannot be performed.

Even if the setting angle intervals of the universal attachment disclosed in Japanese Utility Model Laid-Open No. 61-78538 are set to be finer angle intervals, the pin holes and bolt holes which are positioning and fixing means are provided on the base side body and It is difficult to machine the tip side body with high accuracy, and there is a problem that an error occurs in the machining stage.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a universal attachment which enables precise and fine angle setting easily and quickly.

[0006]

To achieve the above object, the present invention rotatably supports an input shaft connected to a main shaft of a machine body and is fixed to the machine body. A case, and a tip side main body case having a tool chuck at the tip end and rotatably bearing an output shaft that receives power of the input shaft, the tip side main body case, with respect to the base end side main body case, A universal attachment rotatably mounted around a joint shaft orthogonal to the input shaft, wherein the base end side main body case and the tip end side main body case are connected to each other in a circumferential direction about the joint shaft. Each angle setting element is provided, and angle fixing means is provided at the matching position of both angle setting elements to set the angle of both main body cases, and it is a universal attachment that satisfies the condition of Formula 1.

[0007]

[Equation 1] In addition, the above universal attachment includes
A main body case in which an intermediate plate that can be integrated with one of the base body case and the front body case is interposed between the base body case and the front body case, and is integrated with the intermediate plate. The angle setting element is preferably provided on the intermediate plate, and between the intermediate plate and one main body case in which the intermediate plate is integrated, an adjusting means capable of adjusting the fixed position of the both. Is preferably provided. Further, it is preferable that at least the outer periphery of the input shaft is provided with a sealing means from the outside.

[0008]

As described above, according to the present invention, the difference between the distance between the angle setting elements of the base body case and the distance between the angle setting elements of the tip body case is Y-X = Y-{( n-1) /
Since n} Y = Y / n, and the angle fixing means is provided at the matching position of both angle setting elements to set the angle of both main body cases, the distance is smaller than the actually processed intervals of X and Y. An angle can be indexed for each angle of Y / n.

That is, for example, in the universal attachment according to the present invention, X = 10 degrees and Y = 11.
In the case of n = 11, Y / n = 1 degree, and the angle can be indexed at a finer angle interval than the actually processed angle intervals of 10 and 11 degrees.

Further, by providing an angle setting element on the intermediate plate, the rotation angle between the proximal body case and the distal body case can be set by the proximal body case or the distal body case and the intermediate plate. Since the intermediate plate can be processed more easily than the base end side main body case and the tip end side main body case, there is little error in setting the rotation angle.

Further, even if a processing error occurs, the angle can be adjusted between the plate and one of the body cases integrated with the plate, so that the processing error can be corrected by this angle adjusting mechanism. I can.

[0012]

EXAMPLES Examples of the present invention will be described below. FIG. 1 shows a cross-sectional view of a universal attachment 10 according to this embodiment. As shown in FIG. 1, the universal attachment 10 mainly includes a base body case 12 fixed to a machine tool side such as a milling machine and a base case. A front end side main body case 14 that can rotate around an axis orthogonal to the main axis of the machine main body with respect to the end side main body case 12 is provided.

The base end side of the base end side main body case 12 is attached to a main shaft holder 16, and the base end side main body case 12 rotatably supports an input shaft 20 having a first bevel gear 18 fixed to the front end side. To do. The base body case 10 is integrally provided with a pair of connecting fork portions 22 extending in the front end direction, and the joint shaft 26 is supported so as to straddle the connecting fork portions 22. The joint shaft 26 includes a second bevel gear 24 that is orthogonal to the input shaft 20 and meshes with the first bevel gear 18. The joint shaft 26 is rotatably supported by a bearing 28, and the bearing 28 is held by a bearing case 30. Also, reference numeral 32
Is a bearing nut for preventing the bearing 28 from falling off, and 34 is a bearing cap 34 attached to each connecting fork portion.

The output shaft 4 is mounted on the tip side main body case 14.
0 is rotatably supported by a bearing 42, and the output shaft 40 has a third bevel gear 36 that meshes with the second bevel gear at one end and holds a tool such as a drill at the other end. It has a chuck 38. The bearing 42 is held by bearing nuts 44 and 46. Further, as shown in FIG. 3, the distal end side main body case 14 is composed of a cylindrical portion 15 for accommodating the output shaft 40 and a pair of disc portions 17 extending in a fork shape from the proximal end side of the cylindrical portion 15, A circular hole 19 is formed in the center of the disk portion 17 so as to be aligned with each other. The center of each round hole 19 coincides with the center of the joint shaft 26.
At, the joint shaft 26 is rotatably mounted on the outer circumference of the bearing case 30. In FIG. 1, reference numeral 48
Is an intermediate plate between the base end side main body case 12 and the front end side main body case 14 and integrated with the front end side main body case 14 to set an angle with the base end side main body case, as will be described later.

Since the universal attachment 10 is constructed in this manner, the distal end side main body case 14 can rotate with respect to the proximal end side main body case 12 about the joint shaft 26, and the input shaft 20 rotates. Is transmitted to the output shaft 40 via the joint shaft 26, whereby the tool held by the chuck 38 rotates.

In FIG. 2, reference numeral 52 denotes a fixing screw for firmly fixing the base end side main body case 12 and the front end side main body case 14 to each other, and a plurality of (for example, three) fixing screws are provided at equal intervals in the circumferential direction. There is. As shown in FIG. 1, each of the fixing screws 52 is screwed into the base end side main body case 12 and penetrates the intermediate plate 48 so as to penetrate the front end side main body case 14.
Up to the point where it is screwed with the tightening nut 53. The fixing screws 52 are attached to the intermediate plate 48 and the distal end side main body case 14 so as to allow the respective fixing screws 52 to project and to allow relative rotation with the proximal end side main body case 12 without tightening the fixing screws. An elongated hole 55 and an elongated groove 54 are formed along the locus along which the object moves (see FIG. 3).
And FIG. 4).

Reference numeral 56 shown in FIG. 2 is a first angle setting hole for setting an angle between the base body case 12 on the proximal end side and the body case 14 on the distal end side. The angle setting hole 56 is the fixing screw. A constant angle in the same circumferential direction outside the hole 50,
For example, a plurality of base body cases 12 themselves are formed at intervals of 11 degrees (see FIG. 5). A setting screw 60 is screwed into each angle setting hole 56. Further, reference numeral 58 shown in FIGS. 2 and 4 denotes a plurality of second plates formed in the intermediate plate 48 at the same circumferential position as the first angle setting holes 56.
Second angle setting hole 58 adjacent to each other.
Are formed in the circumferential direction at intervals smaller than the intervals of the first angle setting holes 56, for example, at intervals of 10 degrees (see FIG. 5).

The intermediate plate 48 is the tip side main body case 14
Since it is fixed to, the setting screw 60 is screwed from the base end side main body case side so as to straddle a pair of the first and second angle setting holes 56 and 58 that are aligned with each other. The angle between the base end side main body case 12 and the tip end side main body case 14 can be set via the plate 48.

As shown in FIG. 6, which is a cross-sectional view taken along line VI-VI of FIG. 2, the intermediate plate 48 has a first screw hole through a bolt hole 59 in which the bolt 62 is formed in the intermediate plate 48. It is fixed to the front end side main body case 14 by being screwed into 61. At positions on both sides of the bolt 62, the first and second adjusting screws 64B and 64C are screwed into the first and second screw holes 63B and 63C of the intermediate plate, and the tips of the respective screws are tapered. And is projected toward the tip side main body case 14. On the other hand, taper-shaped first and second adjustment holes 66B and 66C are formed in the facing surface of the tip side main body case 14 to receive the tip portions of the respective screws. In FIG. 6, the taper surface on the left side of the first adjusting screw 64B is the first hole 66B.
The taper surface on the right side of the first adjusting screw 64C contacts the right side surface of the second hole 66C. Therefore, the intermediate plate 48 is first
Fine adjustment is possible by moving the adjusting screw 64B in the right direction and by moving the second adjusting screw 64C in the left direction. Incidentally, reference numerals 68A and 68
B and 68C are introduction holes for guiding the adjusting screws 64A, 64B and 64C to the corresponding adjusting screw holes 66A, 66B and 66C.

Further, reference numeral 70 in FIG. 1 is a seal ring for preventing cutting chips and cutting fluid from entering the meshing portions of the bevel gears 18, 24 and 36 from the outside, and reference numeral 72.
Is a ring case having a similar function. As shown in FIG. 7, the seal ring 70 is a rectangular cylinder and is terminated at the curved portion 71 so that the end surface on the tip end side matches the shape of the outer periphery of the base end of the ring case 72. Also,
As shown in FIG. 7, the ring case 72 is mainly formed in a short cylindrical shape, and the diameter of the inner peripheral surface 73 of the ring case 72 is substantially the same as the outer diameter of the intermediate plate so that the intermediate plate 48 can be fitted therein. ing. Also, ring case 7
An opening 74 cut out in a band shape is formed on a part of the outer peripheral surface of 2, and the base end of the tip side main body case 14 is formed in the opening 74 so that the opening can be inserted. Since the distal end side main body case 14 rotates about the joint shaft 26, the circumferential length of the opening 74 is determined according to the range in which the main body side main body case 14 needs to rotate.
Reference numeral 76 is a hole into which the seal ring 70 is inserted, and the input shaft 20 can be inserted into the ring case 72 via the seal ring 70. further,
On the periphery of the ring case 72, for example, graduations at intervals of 1 degree are provided. As shown in FIG. 1, the ring case 72 is closely fitted between the pair of connecting fork portions 22 of the base body case 12.

Next, the angle setting mechanism of the universal attachment 10 according to this embodiment will be described. In this embodiment, ten first angle setting holes 56 are provided at intervals of 11 degrees, and two second angle setting holes 58 are provided.
Since 18 holes are bored at 0 degree intervals,
Of the first and second angle setting holes that are aligned with each other and are capable of receiving the angle setting screws 60 are one set (ie, first angle setting hole 56A in FIG. 5).
And the second angle setting hole 58A) exists, and the first angle adjusting hole 56A on the far right side in FIG. 2 moves the distal end side main body case 14 from the position of 0 degrees with respect to the proximal end side main body case 12. When rotating once in the direction of arrow A in FIG.
Of the angle adjusting hole 58. The tip side main body case 14 is further moved in the direction of arrow A (see FIG.
1), the plate 48 integrated with the tip side main body case 14 slides leftward in FIG. 5 only once, and the second angle setting from the right side in FIG. 2 is performed. Hole 56
B and the second angle setting hole 58 are aligned. Further, every time the tip-side body case 14 is rotated by 1 degree, it is aligned with the third and fourth positions from the right side, and when rotated by 10 degrees, the leftmost first angle adjustment hole 56 in FIG. Align with any of the second angle adjusting holes 58. Then, when it is further rotated once, the rightmost first angle adjustment hole 58A is aligned with the second angle adjustment hole 56, and the above rotation is repeated. That is,
It is configured such that the unit of the rotation angle of the distal end side main body case 14 and the number of the first angle adjusting holes 56 from the right side in which the second angle adjusting holes 58 align are the same.

Next, a method for setting the angle of the universal attachment 10 will be described. First, for 0 degree adjustment,
The chuck 38 holds the test bar, and the turning angle of the tip side main body case 14 is set so that the scale provided on the peripheral portion of the first gear case 70 becomes zero. On this occasion,
If there is a slight error in the matching between the first angle setting hole 56 and the second angle setting 58, the adjustment screw 64B or 64C can be easily screwed or unwound as described above. It is possible to correct the error so that 0
The degree can be adjusted.

When the distal end side main body case 14 is rotated at a predetermined angle with respect to the proximal end side main body case 12, for example, 45 degrees,
The tip side main body case 14 is adjusted to 45 degrees by the scale provided on the gear seal 70. At this time, as described above, the fifth first angle adjusting hole 56E from the right side in FIG. 2 is aligned with the second angle adjusting hole. Next, by screwing the angle setting screw 60 into the aligned second angle adjusting hole 58, the screw 60 is caused to enter the second angle setting hole 56, and the tip side is indexed by 45 degrees. The main body case 14 can be tilted with respect to the proximal end side main body case 12. Further, by tightening the fixing screw 52, the front end side main body case 14 is moved to the base end side main body case 1.
Fixed to 2. In this way, the universal attachment 10 according to the present embodiment can set the angle at intervals of 1 degree over an angle of 90 degrees, for example.

As described above, according to this embodiment, it is possible to accurately set the angle at a finer angle than the interval (10 or 11 degrees) between the actually processed angle adjusting holes.

Further, according to the present embodiment, since one of the two angle setting holes is formed in the intermediate plate which is a member separate from the main body case, at least the angle setting hole is machined in the intermediate plate with high accuracy. Therefore, the angle can be indexed at an extremely minute interval, for example, an interval of 1 degree or less, and an error between both holes can be reduced. Further, for example, even if such an error occurs, it can be corrected by adjusting the adjusting screw 64B or 64C.

In the present embodiment, the first angle setting holes 56 have an interval of 11 degrees, and the second angle interval setting holes 58 have an interval of 10 degrees. It suffices that the relational expression X = {(n-1) / n} Y is satisfied. For example, the interval Y of the first angle setting holes is Y = 10 degrees,
By setting the interval X between the second angle setting holes to X = 9 degrees and n = 20, the angle can be set every Y / n = 10/20 = 0.5 degrees.

[0027]

As described above, according to the present invention,
Also, it is possible to provide a universal attachment that allows easy and quick setting of a fine angle.

[Brief description of drawings]

FIG. 1 is a side sectional view of a universal attachment according to an embodiment of the present invention.

FIG. 2 is a front view of the universal attachment according to the embodiment of the present invention.

FIG. 3 is a front view of a spindle case.

FIG. 4 is a front view of a plate.

FIG. 5 is a developed sectional view of an angle indexing mechanism of a universal attachment.

FIG. 6 is a developed sectional view of an adjusting mechanism of a universal attachment.

FIG. 7 is an assembled perspective view of a seal ring, a ring case, and an intermediate plate.

[Explanation of symbols]

 10 Universal Attachment 12 Base End Side Body Case 14 Tip Side Body Case 16 Spindle Holder (Machine Body) 20 Input Shaft 26 Joint Shaft 38 Tool Chuck 40 Output Shaft 56 First Angle Setting Hole (Angle Setting Element) 58 Second Angle Setting hole (angle setting element) 60 Setting screw (angle fixing means)

Claims (4)

[Claims] 1. An output which has a base body case which rotatably supports an input shaft connected to a main shaft of a machine body and which is fixed to the machine body, and a tool chuck at the tip, and which receives power from the input shaft. A distal end side main body case that rotatably supports a shaft, and the distal end side main body case is attached to the base end side main body case so as to be rotatable around a joint shaft orthogonal to the input shaft. A universal attachment, wherein each of the proximal end side main body case and the distal end side main body case is provided with a plurality of angle setting elements continuous in the circumferential direction around the joint axis, and the angle fixing elements are fixed at the matching positions of both angle setting elements. Universal attachment that satisfies the condition of Formula 1 while setting the angle of both main body cases by providing means. [Equation 1] 2. An intermediate plate which can be integrated with one of the base end side main body case and the front end side main body case is interposed between the base end side main body case and the front end side main body case, and the intermediate plate The universal attachment according to claim 1, wherein an angle setting element of the body case to be integrated is provided on the intermediate plate. 3. The universal attachment according to claim 2, further comprising adjusting means provided between the intermediate plate and one of the main body cases in which the intermediate plate is integrated, the adjusting means being capable of adjusting a fixed position of both. 4. The universal attachment according to claim 1, further comprising sealing means for sealing at least the outer periphery of the input shaft from the outside.