Additional shaft mounting arrangement

Abstract

An additional shaft mounting structure is provided, which allows for easy installation of the additional shaft after maintenance, and offers excellent versatility and precise installation of the additional shaft. The additional shaft mounting structure (1) disclosed herein includes a base member (6) that connects a rotary shaft housing (3) with an additional shaft (2) to an additional shaft mounting portion (5) of a machine tool (4). The base member (6) includes: a first base member (9) detachably mounted to the rotary shaft housing (3); and a second base member (10) detachably mounted to the additional shaft mounting portion (5). The first base member (9) and the second base member (10) are positioned by interlocking engagement portions (23).

Description

Technical Field

[0001] This disclosure relates to an additional axis mounting structure for mounting an additional axis on a machine tool. Background Technology

[0002] Conventionally, machine tools such as machining centers are equipped with one or more auxiliary axes. For example, the auxiliary axis is mounted on the machine tool's worktable (an example of an auxiliary axis mounting unit) with its rotation axis aligned with the machine tool's Z-axis. In this case, the auxiliary axis is configured so that its axial direction is perpendicular to the machine tool's worktable. Therefore, the lower end of the auxiliary axis's axial direction is brought as close as possible to the upper surface of the machine tool's worktable.

[0003] Various structures can be used to mount the auxiliary axis to the machine tool's worktable. For example, a structure in which a flange is provided on the auxiliary axis can be used. In the case of a structure with a flange on the auxiliary axis, the auxiliary axis can be detachably mounted to the machine tool's worktable by means of the flange.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-11312 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] In the past, because the lower end of the auxiliary axis was closest to the upper surface of the machine tool's table, it was necessary to remove the auxiliary axis from the table when maintaining its lower end. In conventional designs, removing the auxiliary axis from the table made it difficult to reinstall it in its original position. Therefore, a position determination part indicating the position of the auxiliary axis relative to the machine tool's table was sometimes used. However, using a position determination part when installing the auxiliary axis on the machine tool's table increases the number of parts required, making the installation of the auxiliary axis labor-intensive. Furthermore, due to space constraints on the machine tool's table, it was sometimes impossible to use a position determination part.

[0009] Traditionally, a plate-shaped shim is sometimes inserted between the machine tool's table and the auxiliary axis to adjust the accuracy of the auxiliary axis's posture. When the shim is positioned between the machine tool's table and the auxiliary axis, removing the auxiliary axis from the machine tool's table also removes the shim from between the table and the auxiliary axis. After removing the auxiliary axis from the machine tool's table, when installing the auxiliary axis in its original position on the machine tool's table, the shim will be inserted between the table and the auxiliary axis. If the shim is reinserted in this manner, the accuracy of the auxiliary axis's posture may decrease.

[0010] In the past, additional axes sometimes had flanges for fixing. If an additional axis with a flange is used on a machine tool with two additional axes, the flange may become an obstacle and make it unusable. Therefore, conventional additional axis mounting structures lacked versatility.

[0011] To address the aforementioned issues, a mounting structure for the additional shaft is desired that allows for easy installation after maintenance of the additional shaft, offers excellent versatility, and enables precise installation of the additional shaft.

[0012] Solution for solving the problem

[0013] The additional shaft mounting structure disclosed herein includes a base member that connects a rotary shaft housing having an additional shaft to an additional shaft mounting portion of a machine tool; the base member includes: a first base member detachably mounted to the rotary shaft housing; and a second base member detachably mounted to the additional shaft mounting portion; the first base member and the second base member are positioned by interlocking engagement portions. Attached Figure Description

[0014] Figure 1 This is a schematic perspective view showing the usage state of the additional shaft mounting structure according to one embodiment of the present invention.

[0015] Figure 2 This is a perspective view showing the additional shaft mounting structure according to one embodiment of the present invention, viewed from above.

[0016] Figure 3 This is a perspective view showing the additional shaft mounting structure according to one embodiment of the present invention, viewed from below.

[0017] Figure 4 This is a perspective view showing the usage state of the additional shaft mounting structure according to one embodiment of the present invention, indicating that the first base member has been removed from the second base member.

[0018] Figure 5 This is a perspective view showing the usage state of the additional shaft mounting structure according to an embodiment of the present invention, showing the state in which the rotating shaft housing is mounted to the middle of the second base member by means of a retaining member.

[0019] Figure 6 This is a perspective view showing the usage state of the additional shaft mounting structure according to an embodiment of the present invention, indicating that the rotating shaft housing has been mounted on the second base member by means of a retaining member.

[0020] Figure 7 This is a perspective view from below showing the usage state of the additional shaft mounting structure according to an embodiment of the present invention, indicating the state in which the rotating shaft housing is mounted on the second base member by means of a retaining member. Detailed Implementation

[0021] The following description, with reference to the accompanying drawings, illustrates one aspect of the additional shaft mounting structure of this disclosure. (Refer to...) Figures 1 to 3 The additional shaft mounting structure 1 of this embodiment will be described below. The additional shaft mounting structure 1 includes a base member 6. The base member 6 is a member that connects the rotary shaft housing 3, which has the additional shaft 2, to the additional shaft mounting portion 5 of the machine tool 4. Furthermore, in Figures 1 to 3 For ease of explanation, the axial direction of the additional shaft 2 is defined as the vertical direction D1. At this point, one direction within the axial direction is defined as the upward direction D11, and the other direction is defined as the downward direction D12. Figure 1 In this diagram, one of the two directions intersecting with the up / down direction D1 is designated as the front / back direction D2, and the other as the left / right direction D3. More specifically, the direction from the inside of the machine tool 4 towards the near front is defined as the front direction D21, its opposite direction as the rear direction D22, and they are combined to define the front / back direction D2. Additionally, the left direction D31 and its opposite right direction D32 are combined to define the left / right direction D3. These directions (up / down, front / back, left / right) used for ease of explanation may sometimes differ from the directions on the actual machine.

[0022] The rotary shaft housing 3 has a housing body 7 and an auxiliary shaft 2. In this embodiment, the housing body 7 is a quadrilateral box-shaped structure when viewed from above. The auxiliary shaft 2 is rotatably mounted on the housing body 7. With the auxiliary shaft 2 mounted on the housing body 7, its axial direction is along the vertical direction D1. The auxiliary shaft 2 penetrates the housing body 7 in the vertical direction D1. With the auxiliary shaft 2 mounted on the housing body 7, the auxiliary shaft 2 can rotate about its own axis. This rotary shaft housing 3, with the auxiliary shaft 2's axial direction along the vertical direction D1, is mounted on the machine tool 4 as described later. Therefore, in this embodiment, the auxiliary shaft 2 is a C-axis.

[0023] The machine tool 4 has an auxiliary axis mounting section 5 for mounting auxiliary axes 2. While the machine tool 4 is not particularly limited, in this embodiment it is a machining center. When the machine tool 4 is a machining center, the auxiliary axis mounting section 5 is the worktable of the machining center. The auxiliary axis mounting section 5 is plate-shaped, with its plate surface facing the vertical direction D1. On the upper plate surface of the auxiliary axis mounting section 5, a plurality of grooves 8 are provided, opening upwards and recessed downwards. Each groove 8 extends along the horizontal direction D3. The plurality of grooves 8 are arranged at a distance in the front-back direction D2.

[0024] When a rotary shaft housing 3 is installed in the auxiliary shaft mounting section 5 of the machine tool 4, a base member 6 is used. The base member 6 has a first base member 9 located on the upper side and a second base member 10 located on the lower side.

[0025] In this embodiment, the first base member 9 is a plate-shaped structure that is approximately quadrilateral in top view, with the plate surface facing the vertical direction D1. The first base member 9 has a through-hole 11 for an additional shaft 2 disposed in the rotating shaft housing 3 to pass through. The through-hole 11 is located at the center of the first base member 9. The through-hole 11 is circular in top view and passes through the first base member 9 in the vertical direction D1. The first base member 9 also has base mounting holes 12 for detachably mounting the first base member 9 to the second base member 10. The base mounting holes 12 are located at the four corners of the first base member 9. The base mounting holes 12 are circular in top view and pass through the first base member 9 in the vertical direction D1. The base mounting holes 12 are stepped holes, having a large-diameter hole 13 on the upper side and a small-diameter hole 14 on the lower side. Furthermore, the number of base mounting holes 12 is not limited to 4.

[0026] The first base member 9 is detachably mounted to the rotating shaft housing 3. Therefore, in this embodiment, the first base member 9 has a housing mounting hole 15 for mounting the first base member 9 to the rotating shaft housing 3. The housing mounting hole 15 is circular in plan view and extends through the first base member 9 in the vertical direction D1. In the example shown, two housing mounting holes 15 are located on the front side of the first base member 9, and two housing mounting holes 15 are located on the rear side of the first base member 9. The number of housing mounting holes 15 is not limited to four. The housing mounting holes 15 are stepped holes, having a small-diameter hole 16 on the upper side and a large-diameter hole 17 on the lower side.

[0027] In this embodiment, the second base member 10 is larger than the first base member 9 and is a roughly quadrilateral plate when viewed from above, with the plate surface facing the vertical direction D1. The second base member 10 has a receiving portion 18 for receiving the lower end of the additional shaft 2 disposed in the rotating shaft housing 3. The receiving portion 18 is located in the center of the second base member 10. The receiving portion 18 is a concave shape with a bottom and an opening at the top, and is circular when viewed from above. The second base member 10 has a base fixing hole 19 for detachably mounting the first base member 9 to the second base member 10.

[0028] The base fixing holes 19 are provided on the second base member 10 in a manner corresponding to the base mounting holes 12 of the first base member 9. Specifically, the two base fixing holes 19 are located on the front side of the second base member 10, and the two base fixing holes 19 are located on the rear side of the second base member 10. The base fixing holes 19 are threaded holes with threads formed on their inner circumferential surfaces.

[0029] The second base member 10 is detachably mounted to the auxiliary shaft mounting portion 5 of the machine tool 4. Therefore, in this embodiment, the second base member 10 has base mounting holes 21 for mounting the second base member 10 to the auxiliary shaft mounting portion 5. The base mounting holes 21 are located at the four corners of the second base member 10. The base mounting holes 21 are circular in plan view and penetrate the second base member 10 in the vertical direction D1. Furthermore, the number of base mounting holes 21 is not limited to four.

[0030] The first base member 9 and the second base member 10 are positioned by engaging portions 22 and 23. Therefore, in this embodiment, the first base member 9 has a concave engaging portion 22, and the second base member 10 has a convex engaging portion 23. The engaging portion 22 of the first base member 9 is recessed upwards on the lower surface of the first base member 9. The engaging portion 22 of the first base member 9 is circular when viewed from the bottom. The engaging portion 23 of the second base member 10 is protruding upwards on the upper surface of the second base member 10. The engaging portion 23 of the second base member 10 is cylindrical.

[0031] In the example shown, two engaging portions 22 are provided at the front end edge of the first base member 9, and two engaging portions 23 are provided at the front end edge of the second base member 10. The two engaging portions 22 are arranged at a distance from each other along the length direction of the front end edge of the first base member 9. The two engaging portions 23 are arranged at a distance from each other along the length direction of the front end edge of the second base member 10.

[0032] To position the first base member 9 and the second base member 10, simply place the upper surface of the second base member 10 against the lower surface of the first base member 9, and insert the convex engaging portion 23 of the second base member 10 into the concave engaging portion 22 of the first base member 9. While the first base member 9 has a concave engaging portion 22 and the second base member 10 has a convex engaging portion 23, the opposite configuration is also possible. That is, the first base member 9 may have a convex engaging portion, and the second base member 10 may have a concave engaging portion. The engaging portions 22 of the first base member 9 and 23 of the second base member 10 are not limited to the shapes described above.

[0033] Because of this configuration in this embodiment, the rotary shaft housing 3 with the additional shaft 2 can be mounted on the additional shaft mounting section 5 of the machine tool 4 via the base member 6. When the rotary shaft housing 3 is mounted on the additional shaft mounting section 5, the axial direction of the additional shaft 2 is along the vertical direction D1.

[0034] Specifically, with the lower surface of the second base member 10 abutting against the upper surface of the auxiliary shaft mounting portion 5, the bolt 24 is inserted through the base mounting hole 21 into the groove 8 on the upper surface of the auxiliary shaft mounting portion 5, thereby mounting the second base member 10 onto the auxiliary shaft mounting portion 5. The second base member 10 can be mounted at any position along the groove 8 of the auxiliary shaft mounting portion 5.

[0035] With the upper surface of the first base member 9 abutting against the lower surface of the rotating shaft housing 3 and the additional shaft 2 passing through the shaft through hole 11, a bolt 26 is screwed into a threaded hole (not shown) of the rotating shaft housing 3 through the housing mounting hole 15, thereby installing the first base member 9 onto the rotating shaft housing 3. With the first base member 9 installed on the rotating shaft housing 3, the lower end of the additional shaft 2 of the rotating shaft housing 3 passes through the shaft through hole 11 of the first base member 9, and therefore protrudes downward from the first base member 9. In the illustrated example, the lower end of the additional shaft 2 is approximately circular when viewed from the bottom surface.

[0036] With the first base member 9 installed on the rotating shaft housing 3, the head of the bolt 26 is received within the large-diameter hole 17 of the housing mounting hole 15. Therefore, the head of the bolt 26 does not protrude downward from the first base member 9. With the lower surface of the first base member 9 abutting against the upper surface of the second base member 10, and the engaging portion 23 of the second base member 10 inserted into the engaging portion 22 of the first base member 9, the bolt 27 is screwed into the base fixing hole 19 of the second base member 10 through the base mounting hole 12, thereby installing the first base member 9 onto the second base member 10. Therefore, the first base member 9 is detachably installed on the second base member 10.

[0037] When the first base member 9 is installed on the second base member 10, the engaging portion 23 of the second base member 10 engages with the engaging portion 22 of the first base member 9, thereby positioning the first base member 9 relative to the second base member 10. With the first base member 9 installed on the second base member 10, the head of the bolt 27 is received within the large-diameter hole 13 of the base mounting hole 12. Therefore, the head of the bolt 27 does not protrude upwards from the first base member 9.

[0038] The rotating shaft housing 3 is mounted to the additional shaft mounting portion 5 via the base member 6. Therefore, the base member 6 can detachably connect the rotating shaft housing 3 to the additional shaft mounting portion 5. With the rotating shaft housing 3 mounted on the additional shaft mounting portion 5, the lower end of the additional shaft 2 is received within the receiving portion 18 of the second base member 10.

[0039] Next, use Figures 4 to 7The maintenance of the additional shaft 2 of the rotating shaft housing 3 will be explained. As described above, the rotating shaft housing 3 is mounted on the additional shaft mounting part 5 by means of the base member 6. In this case, the rotating shaft housing 3 can be said to be detachably mounted on the second base member 10 by means of the first base member 9. Here, the state in which the rotating shaft housing 3 is mounted on the second base member 10 by means of the first base member 9 is referred to as the "first state".

[0040] In order to perform maintenance on additional shaft 2, firstly as follows Figure 4 As shown, the rotating shaft housing 3 is removed from the first state. Specifically, with the first base member 9 already installed on the rotating shaft housing 3, the first base member 9 is removed from the second base member 10, which is already installed on the additional shaft mounting part 5. To remove the first base member 9 from the second base member 10, simply remove the bolt 27 from the base fixing hole 19 of the second base member 10. This releases the connection between the first base member 9 and the second base member 10, making the first base member 9 removable relative to the second base member 10. By lifting the first base member 9 from this state, the rotating shaft housing 3, on which the first base member 9 is installed, can be removed from the second base member 10. By lifting the first base member 9, the engagement between the engaging part 22 of the first base member 9 and the engaging part 23 of the second base member 10 is released. That is, by lifting the first base member 9, the engaging portion 23 of the second base member 10 will be pulled out from the engaging portion 22 of the first base member 9.

[0041] After removing the first base component 9 from the second base component 10, as follows Figures 5 to 7 As shown, the rotating shaft housing 3 is detachably mounted to the second base member 10 via the retaining member 28. Specifically, the retaining member 28 is detachably mounted to the rotating shaft housing 3, and the retaining member 28 is detachably mounted to the second base member 10 in the state where it is already mounted on the additional shaft mounting part 5.

[0042] The retaining member 28 is a plate that is approximately quadrilateral in plan view, with its surface facing vertically in the direction D1. The retaining member 28 has housing mounting holes 29 for mounting to the rotating shaft housing 3. The housing mounting holes 29 are circular in plan view and extend through the retaining member 28 in the vertical direction D1. In the example shown, two housing mounting holes 29 are located on the front side of the retaining member 28, and two housing mounting holes 29 are located on the rear side of the retaining member 28. The number of housing mounting holes 29 is not limited to four.

[0043] The housing mounting hole 29 is a stepped hole, having a small-diameter hole 30 on the upper side and a large-diameter hole (not shown) on the lower side. The retaining member 28 has a base mounting hole 31 for mounting to the second base member 10. The base mounting hole 31 is circular in plan view and extends through the retaining member 28 in the vertical direction D1. In the illustrated example, the two base mounting holes 31 are located at the right end edge of the retaining member 28. The two base mounting holes 31 are spaced apart along the length of the right end edge of the retaining member 28. The number of base mounting holes 31 is not limited to two.

[0044] The retaining member 28 and the second base member 10 are positioned by engaging portions that engage with each other. Therefore, in this embodiment, a concave engaging portion (not shown) is provided on the retaining member 28. The engaging portion of the retaining member 28 is recessed inward on the lower surface of the retaining member 28. The engaging portion of the retaining member 28 is circular when viewed from the bottom. In the example shown, one engaging portion is provided at the front end edge of the retaining member 28. In this embodiment, the engaging portion 23 of the second base member 10 is used as the engaging portion that engages with the engaging portion of the retaining member 28.

[0045] The engaging portion 23 of the second base member 10 is used when positioning the first base member 9 and the second base member 10. To position the retaining member 28 and the second base member 10, simply place the lower surface of the retaining member 28 against the upper surface of the second base member 10 and insert the convex engaging portion 23 of the second base member 10 into the concave engaging portion of the retaining member 28.

[0046] like Figure 5 and Figure 7 As shown, with one surface of the retaining member 28 abutting against a predetermined side of the rotating shaft housing 3, the bolt 32 is screwed into the rotating shaft housing 3 through the housing mounting hole 29 of the retaining member 28, thereby installing the retaining member 28 onto the rotating shaft housing 3. Therefore, the retaining member 28 is detachably installed onto the rotating shaft housing 3. With the retaining member 28 installed onto the rotating shaft housing 3, the head of the bolt 32 is received within the large-diameter hole of the housing mounting hole 29. Therefore, the head of the bolt 32 does not protrude downwards from the retaining member 28.

[0047] like Figure 5 and Figure 6As shown, with the other surface of the retaining member 28 abutting against the upper surface of the second base member 10 already installed on the additional shaft mounting portion 5, and the engaging portion 23 of the second base member 10 inserted into the engaging portion of the retaining member 28, the bolt 33 is screwed into the base fixing hole 19 of the second base member 10 through the base mounting hole 31 of the retaining member 28, thereby installing the retaining member 28 onto the second base member 10. Therefore, the retaining member 28 is detachably installed onto the second base member 10. In this embodiment, when the retaining member 28 is installed onto the second base member 10, the base fixing hole 19 used for installing the first base member 9 onto the second base member 10 is utilized. Therefore, in this embodiment, it is not necessary to provide a separate threaded hole for installing the retaining member 28 onto the second base member 10.

[0048] The rotating shaft housing 3 is mounted to the second base member 10 by means of the retaining member 28. With the rotating shaft housing 3 mounted to the second base member 10, the axial direction of the auxiliary shaft 2 is along the left-right direction D3. In this case, the axial direction of the auxiliary shaft 2 intersects the axial direction of the auxiliary shaft 2 in the first state. Here, the following state is referred to as the "second state": the rotating shaft housing 3, with the auxiliary shaft 2 mounted along the axial direction intersecting the axial direction of the auxiliary shaft 2 in the first state, is mounted to the second base member 10 in the state where the auxiliary shaft mounting part 5 is mounted.

[0049] In the second state, the rotating shaft housing 3 is detachably mounted on the second base member 10, which is already installed in the auxiliary shaft mounting section 5, via the retaining member 28. The rotating shaft housing 3 is folded down when changing from the first state to the second state. Therefore, in the second state, since the axial direction of the auxiliary shaft 2 intersects with the axial direction of the auxiliary shaft 2 in the first state, the lower end of the auxiliary shaft 2 can be exposed. This allows for maintenance and inspection of the lower end of the auxiliary shaft 2.

[0050] After maintenance is completed, the rotating shaft housing 3 returns to the first state. Specifically, after removing the retaining member 28 from the rotating shaft housing 3 and the second base member 10, the first base member 9, on which the rotating shaft housing 3 is mounted, is installed on the second base member 10. In this way, in this embodiment, the state can be changed between the first state and the second state.

[0051] Furthermore, in this embodiment, in order to adjust the accuracy of the orientation of the additional shaft 2 provided in the rotating shaft housing 3, a shim (not shown) may also be used. The shim is a thin sheet made of metal. The shim is provided between the lower surface of the rotating shaft housing 3 and the upper surface of the first base member 9, and between the lower surface of the second base member 10 and the upper surface of the additional shaft mounting portion 5.

[0052] In the case of the additional shaft mounting structure 1 of this embodiment, the rotary shaft housing 3 having the additional shaft 2 is mounted to the additional shaft mounting section 5 of the machine tool 4 via the base member 6. Therefore, with the first base member 9 already mounted on the rotary shaft housing 3, the first base member 9 can be detached from the second base member 10 which is already mounted on the additional shaft mounting section 5. Therefore, according to the additional shaft mounting structure 1 of this embodiment, the rotary shaft housing 3 can be returned to its original position after being removed from the additional shaft mounting section 5.

[0053] In the case of the additional shaft mounting structure 1 of this embodiment, the first base member 9 is detachably mounted to the rotating shaft housing 3. Therefore, according to the additional shaft mounting structure 1 of this embodiment, the first base member 9, which serves as the flange for mounting the rotating shaft housing 3 to the additional shaft mounting portion 5, and the additional shaft 2 can be made into separate units.

[0054] In the case of the additional shaft mounting structure 1 of this embodiment, a shim for adjusting the posture of the additional shaft 2 is provided between the lower surface of the rotating shaft housing 3 and the upper surface of the first base member 9, and between the lower surface of the second base member 10 and the upper surface of the additional shaft mounting portion 5. In the case of the additional shaft mounting structure 1 of this embodiment, the additional shaft 2 can be removed from the additional shaft mounting portion 5 by removing the first base member 9 from the second base member 10. Therefore, according to the additional shaft mounting structure 1 of this embodiment, it is not necessary to remove the shim when removing the additional shaft 2 from the additional shaft mounting portion 5.

[0055] In the case of the additional shaft mounting structure 1 of this embodiment, the state can be changed between the first state and the second state. Therefore, according to the additional shaft mounting structure 1 of this embodiment, the lower end of the additional shaft 2 can be easily maintained, and the additional shaft 2 can be easily returned to its original position after maintenance.

[0056] In the case of the additional shaft mounting structure 1 of this embodiment, in the second state, the rotating shaft housing 3 is detachably mounted on the second base member 10 in the state where it is already mounted on the additional shaft mounting part 5 via the retaining member 28. Therefore, according to the additional shaft mounting structure 1 of this embodiment, the rotating shaft housing 3 can be easily mounted on the second base member 10 with the rotating shaft housing 3 in a folded-down state.

[0057] According to the embodiment described above, the rotary shaft housing 3 having the additional shaft 2 is detachably mounted to the additional shaft mounting section 5 of the machine tool 4 by means of the base member 6. Therefore, an additional shaft mounting structure 1 can be provided, which allows for easy installation of the additional shaft 2 after maintenance, has excellent versatility, and can install the additional shaft 2 with good precision.

[0058] While this disclosure has been described in detail, it is not limited to the embodiments described above. Various additions, substitutions, modifications, and partial deletions may be made to these embodiments without departing from the spirit of this disclosure, or from the spirit of this disclosure derived from the content of the claims and their equivalents. In the embodiments described above, the order of actions and processes is shown as an example and is not limited to these orders. The same applies to instances where numerical values ​​or mathematical formulas are used in the description of the embodiments.

[0059] For example, in the above embodiment, the first base member 9 is mounted to the second base member 10 by means of bolts 27, but it can also be detachably mounted to the second base member 10 by means other than bolts 27. In the above embodiment, the first base member 9 and the second base member 10 are provided to be quadrilateral in plan view, but this is not a limitation.

[0060] The following notes further disclose the above-described embodiments.

[0061] (Postscript 1)

[0062] The additional shaft mounting structure (1) includes a base member (6) that connects a rotary shaft housing (3) with an additional shaft (2) to an additional shaft mounting part (5) of a machine tool (4). The base member (6) includes a first base member (9) which is detachably mounted on the rotary shaft housing (3) and a second base member (10) which is detachably mounted on the additional shaft mounting part (5). The first base member (9) and the second base member (10) are positioned by engaging parts (22, 23).

[0063] (Postscript 2)

[0064] The additional shaft mounting structure (1) is based on Appendix 1 and can be changed between a first state and a second state. The first state is when the rotating shaft housing (3) is mounted on the second base member (10) by means of the first base member (9). The second state is when the rotating shaft housing (3) is mounted on the second base member (10) with the additional shaft (2) along an axis that intersects the axis of the additional shaft (2) in the first state and with the first base member (9) mounted.

[0065] (Note 3)

[0066] In the second state, the additional shaft mounting structure (1) is based on Appendix 2, in which the rotating shaft housing (3) is mounted to the second base member (10) via a retaining member (28).

[0067] Explanation of reference numerals in the attached figures

[0068] 1: Additional shaft mounting structure

[0069] 2: Additional shaft

[0070] 3: Rotating shaft housing

[0071] 4: Machine tools

[0072] 5: Additional shaft setting section

[0073] 6: Base components

[0074] 9: First base component

[0075] 10: Second base component

[0076] 22: Card-connecting section

[0077] 23: Card-connecting section

[0078] 28: Retaining components

Claims

1. An auxiliary shaft mounting structure comprising a base member that connects a rotary shaft housing having the auxiliary shaft to an auxiliary shaft mounting portion of a machine tool, wherein, The base component has: A first base component, which is detachably mounted to the rotating shaft housing; and The second base component is detachably mounted to the additional shaft mounting portion. The first base component and the second base component are positioned by interlocking parts.

2. The additional shaft mounting structure according to claim 1, wherein, The additional shaft mounting configuration can be changed between state 1 and state 2. The first state refers to the state in which the rotating shaft housing has been mounted on the second base member by means of the first base member. The second state is the state in which the rotating shaft housing is installed on the second base member, with the additional shaft along an axis that intersects the axis of the additional shaft in the first state and the first base member is installed.

3. The additional shaft mounting structure according to claim 2, wherein, In the second state, the rotating shaft housing is mounted to the second base member via a retaining member.

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