JPH04128105U - Additional structure for tools, etc. - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably and firmly add and connect members, and to be easy to manufacture and highly compatible. [Structure] A detent pin fitted into one member is fitted into a slit groove formed on the end face of the other side to prevent rotation, and both members are connected by a clamp bolt with a tapered portion at the tip. do. [Effect] The wedge effect of the tapered part of the clamp bolt allows for a strong connection, and the rotation stopper pin prevents movement in the rotational direction from being restricted, making it possible to make a strong additional connection. Furthermore, compatibility is improved and manufacturing costs can be reduced.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a structure for adding tools, etc. attached to the main shaft of machine tools, etc., and in particular, The present invention relates to a replenishment structure for tools and the like formed by replenishing and connecting a plurality of members.

0002

[Conventional technology]

Tools attached to the main spindle of machine tools, etc. may be formed from one-piece structures. However, due to requests for ease of manufacturing and cost reduction, it is possible to connect multiple parts. Many tools are used that are added and connected to form a single elongated tool. parts When connecting with a joint, it is especially important that the joint is connected in both the rotational and axial directions. It is necessary to connect the parts without play and to securely fix them.

0003 Japanese Patent Publication No. 41-2517 and the actual technique are known techniques for adding structures for tools, etc. A technique disclosed in Publication No. 52-54074 is mentioned. Tokuko Showa 41-251 The technology disclosed in Publication No. 7 is to insert a tool (head) into the hole of the tool holding body (shank part). The handle (shaft part) of the handle (shaft part) is inserted and the two parts are joined and connected. that fixed hand A keyway and a conical recess are formed in the handle (shaft) as the step, and the tool storage The tapered part of the tip of the clamp bolt screwed into the holder body (shank part) is Rotate and move the handle (shaft) in the axial direction by abutting and engaging the keyway and the recess. It is designed to restrict the On the other hand, disclosed in Utility Model Publication No. 52-54074 The technology to do this is to fit the fixing plug (shaft part) of the boring head into the hole of the connecting shaft on the shank side. This is to add and connect the two. The fixing means is the fixing plug (shaft). The attached screw (clamp) has a conical hole on the side (part) and a conical connection turning part at the tip. screw the conical connection pivot part into the conical hole and engage it in abutment. It is formed from things that fit together. Please note that the axis of the attached screw (clamp bolt) is The attached screw (clamp bolt) is arranged eccentrically with respect to the axis of the conical hole. ) is placed at a position shifted by a certain angle with respect to the blade fixed to the boring head. and the point that the boring head is pulled toward the connecting end surface side of the connecting shaft. It has characteristics.

0004

[Problem that the idea aims to solve]

Disclosed in Japanese Patent Publication No. 41-2517 and Publication Utility Model Publication No. 52-54074 As mentioned above, the additional structure is a clamp bolt with a tapered part at the tip. The connecting and fixing of the additional members is performed only by using the screws. Clamp bolts mentioned above Wedge force is reduced by abutting and engaging the conical recess and the conical hole with the tapered part. acts, and the additional member is fixed with an appropriate clamping force. however , fixing with only clamp bolts is sufficient to withstand cutting force during heavy cutting. Otherwise, the clamp bolt may be damaged or the clamp bolt may become loose. A problem arises.

[0005] This invention solves the above problems and can withstand the cutting force during heavy cutting. In addition to reliably preventing loosening, it has excellent compatibility, and has a simple structure and is easy to manufacture. The purpose of the present invention is to provide a structure for adding tools, etc., which can be easily and inexpensively formed.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention has been developed to connect the shaft of one member to the other member. In the joining structure, such as a tool that connects both parts by inserting it into the insertion hole of the A slit groove is formed at the open end of the insertion hole of the other side member, and the one side member At the same time, a detent pin that engages with the slit groove is fitted, and a tapered part is provided on the tip side. A clamp bolt forming a part is screwed onto the other side member, and a clamp bolt forming a forming a recessed portion having an inclined surface that abuts and engages with the tapered portion of the clamp bolt; It constitutes a replenishment structure for tools, etc.

[0007]

[Effect]

The two parts to be connected are a clamp bolt with a tapered part on the tip side and a detent pin. It is added and connected by. The locking pin is fitted onto the shaft of the member on one side. by engaging with the slit groove formed at the open end of the insertion hole of the other side member. movement in the rotational direction is restricted. Especially since the slit groove is formed at the opening end, The locking pin can be reliably locked, and the slit groove can be formed extremely easily and accurately. It can be manufactured. The engagement of the slit groove with the detent pin and the tightening of the clamp bolt. Both members are restricted from moving in the rotational and axial directions due to the locking action accompanied by rust force. It can be reliably and firmly connected.

[0008]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. This example is a joint between the shank and head of a tool used in machine tools, etc. We will explain the structure of the It is not limited to one place either. As shown in FIG. 1, in this example, the one side The member is referred to as a head portion 1, and the member on the other side is referred to as a shank portion 2. The head part 1 is A shaft portion 3 whose diameter is reduced is formed. On the other hand, the shank part 2 is installed in the tapered hole of the main shaft (not shown). It has a tapered part 4 and a cylindrical part 5, into which the shaft part 3 is inserted. An insertion hole 6 for insertion is bored. At the insertion end of the insertion hole 6, there is a relief portion 7 and a relief portion 7 connected to the relief portion 7. An air escape hole 8 is formed to allow the shaft portion 3 to be inserted securely. Shank part 2 As shown in FIGS. 2 and 3, a slit groove 9 with a groove width b is formed at the open end of the insertion hole 6. be done. In this embodiment, the slit groove 9 is formed along the diameter direction of the cylindrical part 5, Two locations are formed around the insertion hole 6. The cylindrical part 5 has a screw for the clamp bolt 10. A screw hole 12 is formed into which the portion 11 (FIG. 4) is screwed.

[0009] As shown in FIGS. 1 to 3, the shaft portion 3 of the head portion 1 has a detent pin 13 with a diameter of It is fitted along the direction. The detent pin 13 engages with the slit groove 9. It has a diameter d (Fig. 1) that is almost the same as the groove width b of the slit groove 9, and both It is formed of a length that allows the ends to be locked in the two slit grooves 9. In addition, head Insert the head part 1 into the shank part 2, and insert the shank part into the stepped part 14 of the shaft part 3 of the head part 1. When the opening end surfaces 15 (FIG. 2) of It locks exactly in place. Opposed to the screw hole 12 formed in the cylindrical part 5 of the shank part 2 A tapered hole 16, which is one of the recesses, is formed on the outer peripheral side of the shaft portion 3 (see FIGS. 1, 3, (shown in Figure 8).

0010 As shown in FIG. 1, the clamp bolt 10 has a tapered portion 17 at its tip. Tapered part 1 7 fits into the tapered hole 16 of the shaft portion 3 of the head portion 1. As shown in Figure 1, the taper The hole 16 is formed larger than the diameter of the tapered portion 17 of the clamp bolt 10. So Therefore, the tapered portion 17 abuts and engages one inclined surface 18 side of the tapered hole 16, and the other side A gap of size δ is created on the side. As a result, the shaft portion 3 is pressed in the direction of insertion, and The stepped portion 14 of the pad portion 1 and the opening end surface 15 are in pressure contact with each other. In addition, the tapered portion 17 and the taper A wedging force is generated by the abutting engagement of the hole 16 with the inclined surface 18.

[0011] Next, the operation of this embodiment will be explained. Attach the detent pin 13 to the shaft portion 3 of the head portion 1. Insert the shaft part 3 into the insertion hole 6 of the shank part 2, and insert the stepped part 14 into the open end. Abuts against surface 15. In this state, the detent pin 13 fits into the slit groove 9. Since the diameter d of the detent pin 13 and the groove width b of the slit groove 9 are approximately equal, the shaft portion 3 is It is supported by the cylindrical portion 5 while being restrained from moving in the rotational direction. Next, clamp bolt 10 is screwed into the screw hole 12 of the cylindrical part 5, and the tapered part 17 is inserted into the shaft part 3 as described above. The tapered hole 16 is brought into abutment engagement. As a result, the tapered portion 17 Press the slope 18, pull the shaft 3 into the insertion hole 6, and connect the stepped portion 14 and the opening end surface 15. Compress it. As a result, the shaft portion 3 is restrained from moving in the axial direction and inside the cylindrical portion 5. be adhered to. Further, as described above, the gap between the tapered portion 17 and the tapered hole 16 is The shaft portion 3 is firmly fixed to the cylindrical portion 5 by rust force. As a result of the above, the head part 1 and The shank portions 2 are joined and connected as if they were an integral structure.

0012 5 and 6 show other embodiments of the present invention. In the figure, the same as Figures 1 to 4. Items with one symbol indicate the same item or item with the same function. In this embodiment, the rotation stop pin 13 is The feature is that the arrangement direction and the arrangement direction of the clamp bolt 10 intersect (orthogonally) It is something. As shown in FIG. 6, both sides of the tapered portion 17 of the clamp bolt 10 are Since it almost abuts and engages with the tapered hole 16 of the section 3, the clamp bolt 10 is installed. The shaft portion 3 is restrained from moving not only in the axial direction but also in the rotational direction by the cylindrical portion 5. held. On the other hand, as mentioned above, the rotation direction is restrained by the rotation stop pin 13. be done. Therefore, the locking pin 13 and the clamp bolt 10 are arranged in the same position. If they are not on a straight line but intersect, movement in the rotational direction will be more reliably restricted. It becomes.

[0013] FIG. 7 shows yet another embodiment of the invention. In this example, FIGS. 1 to 4 and Items with the same reference numerals indicate the same item or item with the same function. In this example, the circle of the shank part 2 is The feature is that the slit groove 9a formed at the open end of the cylindrical part 5 is formed only in one place. It is something that you have. The shaft part 3 has a detent pin that protrudes only on one side of the outer circumference of the shaft part 3. 13a is fitted. The detent pin 13a abuts and engages with the slit groove 9a. vinegar Even if the slit groove 9a is located at only one place, the detent pin 13a may come into contact with the slit groove 9. This restricts the rotation of the shaft portion 3. The slit groove 9a is located at one place and the stopper pin 1 Since 3a also has a short axis, it can be manufactured more easily than the one in the previous example. come.

[0014] FIG. 8 shows a fitting hole formed in the shaft portion 3 of the head portion 1 for fitting the detent pin 13. 19 and the tapered hole 16, which is one of the recesses in which the clamp bolt 10 abuts and engages, are shown. . The tapered hole 16 in FIG. 8 is formed from a tapered conical hole. Figure 9 shows the shank part 1. 5 is a perspective view showing a slit groove 9 formed at the open end of the cylindrical portion 5. FIG. Slit groove 9 For example, by simply cutting the end of the cylindrical part 5 with a milling cutter, the It can be formed with precision.

[0015] 10 and 11 show another embodiment of the recess formed in the shaft portion 3. There is. That is, in this embodiment, a tapered groove 20 is formed instead of the tapered hole 16 in FIG. This is what I did. Slanted surfaces 21 are formed on both side surfaces of the tapered groove 20 . Slope 2 1 by abutting and engaging the tapered portion 17 of the clamp bolt 10 (not shown) on one side of the clamp bolt 10. The same effects as in the above embodiment can be achieved.

[0016] 12 and 13 show another embodiment of the recess formed in the shaft portion 3 of the head portion 1. shows. In this embodiment, the recess is shaped like an inclined groove 23 having an inclined surface 22 only on one side. will be accomplished. As shown in FIG. 12, the tapered portion 1 of the clamp bolt 10 is attached to the inclined surface 22. 7 abuts and engages with the inclined surface 22 to achieve the same effect as in the previous embodiment. I can do it.

[0017] FIG. 14 shows a circumferential tapered groove having inclined surfaces 25 and 26 on both sides in the shaft portion 3 of the head portion 1. 24 was formed. The clamp bolt 10 is inserted into the circumferential tapered groove 24 as shown in the figure. to abut and engage. The clamp bolt 10 is inserted into the locking pin fitting hole 19. The phase position relationship can be freely determined, and manufacturing can be facilitated.

[0018] FIG. 15 shows a circumferential inclined groove 27 in the shaft part 3 of the head part 1 having an inclined surface 28 only on one side. was formed. As in the case of FIG. 14, manufacturing can be facilitated.

[0019] As explained in each of the above embodiments, the joining structure of each of the above embodiments is The head part 1 and the shank part 2 are connected by the retaining pin 13 and the clamp bolt 10. In particular, the slit grooves 9 and 9a provided at the open end of the shank portion 2 are characterized by The feature is that the locking pins 13 and 13a are engaged with each other. Rotating pin The shape and number of the bolts 13, 13a and the shape and number of the clamp bolts 10 are determined according to the above implementation. It is not limited to this example. In addition, the locking pins 13 and 13a and the clamp bolt 1 The arrangement position in relation to 0 is also not limited to the above embodiment. Moreover, the shape of the recessed portion However, the present invention is not limited to the above embodiments. In addition, the slit grooves 9, 9a and the rotation stopper The pins 13, 13a or the recess and the clamp bolt 10 are hardened. You may use the one you made.

[0020]

[Effect of the idea]

According to the present invention, the following remarkable effects are achieved. (1) Both parts are connected and fixed by a rotation stop pin and a clamp bolt, and the rotation direction and and movement in the axial direction is restrained, and the joints are reliably and firmly added. Thereby , can sufficiently withstand the cutting force during heavy cutting and perform efficient cutting. I can do it. (2) Most of the rotational force generated during cutting acts on the clamp bolt as in conventional technology. Instead, the weight is borne by the locking pin. As a result, damage to the clamp bolt may occur. Otherwise, loosening is reliably prevented. (3) The slit groove that fits into the detent pin is formed on the open end side of the member. , it is extremely easy to process and can be processed with high precision. Therefore, the production cost At the same time, the locking pin and the slit groove can be fitted together without play. I can do it. (4) Even if the detent pin wears out, it can be easily removed from the shaft and Since the two slit grooves can be machined with high precision, they can be easily replaced and have excellent compatibility.

[Brief explanation of drawings]

FIG. 1 is an axial sectional view of an embodiment of the present invention.

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is an enlarged axial cross-sectional view of the clamp bolt used in this embodiment.

FIG. 5 is a partial axial cross-sectional view of another embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB in FIG. 5;

FIG. 7 is a partial axial cross-sectional view of still another embodiment of the present embodiment.

FIG. 8 is a plan view showing an embodiment of the recess of the present invention.

FIG. 9 is a partial perspective view showing the structure of the slit groove of the present invention.

FIG. 10 is a plan view showing another embodiment of the recessed portion of the present invention.

FIG. 11 is a sectional view taken along line CC in FIG. 10;

FIG. 12 is an axial sectional view showing another embodiment of the recess of the present invention.

13 is a top view showing the detailed structure of the recess in FIG. 12. FIG.

FIG. 14 is an axial sectional view showing still another embodiment of the recess of the present invention.

FIG. 15 is an axial sectional view showing still another embodiment of the recess of the present invention.

[Explanation of symbols]

1 Head part 2 Shank part 3 Shaft part 4 Taper part 5 Cylindrical part 6 Insertion hole 7 Escape part 8 Air relief hole 9 Slit groove 9a Slit groove 10 Clamp bolt 11 Threaded part 12 Screw hole 13 Detent pin 13a Detent pin 14 Stepped part 15 Opening end surface 16 Tapered hole 17 Taper part 18 Slope 19 Fitting hole 20 Tapered groove 21 Slope 22 Slope 23 Slanted groove 24 Circumferential tapered groove 25 Slope 26 Slope 27 Circumferential inclined groove 28 Slope

Claims (1)

[Scope of utility model registration request] Claim 1: In a fitting structure of a tool or the like for fitting and connecting both members by inserting a shaft portion of one side member into an insertion hole of the other side member, a slit is provided at an open end of the insertion hole of the other side member. a groove is formed, a detent pin that engages with the slit groove is fitted into the one side member, and a clamp bolt having a tapered portion on the tip side is screwed into the other side member; A structure for adding a tool or the like, characterized in that a recessed portion having an inclined surface that abuts and engages with the tapered portion of the clamp bolt is formed in the side member.