JP7231125B1 - Cutting tools - Google Patents

Abstract

A cutting tool is a cutting tool that cuts a workpiece by contacting the workpiece. This cutting tool includes a main body having a housing space for housing a battery, a lid member attachable to the main body so as to close the housing space, a sensor installed in the main body and detecting a physical quantity of the main body, a wireless communication unit that is installed in the main unit and transmits a signal including information on the physical quantity detected by the sensor to the outside. The lid member includes a holding portion that holds the battery. The body portion is installed on the wall surface defining the housing space and includes a terminal electrically connected to the battery.

Description

The present disclosure relates to cutting tools.

A technique is known for grasping the state of a cutting tool by measuring the physical quantity of the cutting tool, for example, strain, with a sensor during machining by the cutting tool (for example, Japanese Patent Application Laid-Open No. 2020-62746 (Patent Document 1). , European Patent Application Publication No. 3292929 (Patent Document 2), European Patent Application Publication No. 3292930 (Patent Document 3), JP 2019-166600 A (Patent Document 4), International Publication No. 2014/154593 (Patent Document 5), JP-A-2007-30138 (Patent Document 6), International Publication No. 2007/088197 (Patent Document 7), JP-A-3-294150 (Patent Document 8), JP-A-2012-20359 ( Patent Document 9), JP-A-2019-130635 (Patent Document 10), JP-A-2019-209420 (Patent Document 11), JP-A-2018-54612 (Patent Document 12), International Publication No. 2016/202569 No. (Patent Document 13), Japanese Patent Application Laid-Open No. 2009-285804 (Patent Document 14) and International Publication No. 2018/047834 (Patent Document 15)).

Japanese Patent Application Laid-Open No. 2020-62746 EP-A-3292929 EP-A-3292930 Japanese Patent Application Laid-Open No. 2019-166600 WO2014/154593 Japanese Unexamined Patent Application Publication No. 2007-30138 WO2007/088197 JP-A-3-294150 JP 2012-20359 A JP 2019-130635 A JP 2019-209420 A JP 2018-54612 A WO2016/202569 JP 2009-285804 A WO2018/047834

A cutting tool according to the present disclosure is a cutting tool that cuts a workpiece by contacting the workpiece. This cutting tool includes a main body having a housing space for housing a battery, a lid member attachable to the main body so as to close the housing space, a sensor installed in the main body and detecting a physical quantity of the main body, a wireless communication unit that is installed in the main unit and transmits a signal including information on the physical quantity detected by the sensor to the outside. The lid member includes a holding portion that holds the battery. The body portion is installed on the wall surface defining the housing space and includes a terminal electrically connected to the battery.

FIG. 1 is a schematic perspective view showing the structure of a cutting tool. FIG. 2 is a schematic perspective view showing the structure of the cutting tool with the lid removed. FIG. 3 is a schematic plan view showing the structure of the cutting tool viewed from the first end side. FIG. 4 is a schematic plan view showing the structure of the cutting tool viewed from the second end side. FIG. 5 is a schematic cross-sectional view along line segment VV in FIG. FIG. 6 is a schematic cross-sectional view along line VI-VI in FIG. FIG. 7 is a schematic perspective view showing the lid member with the battery removed. FIG. 8 is a schematic perspective view showing the lid member with batteries attached. FIG. 9 is a schematic plan view showing the structure of the lid member. FIG. 10 is a schematic front view showing the structure of the lid member. FIG. 11 is a schematic bottom view showing the structure of the lid member. FIG. 12 is a schematic side view showing the structure of the lid member. FIG. 13 is a schematic side view showing the structure of the lid member viewed from the opposite side to FIG. 12. FIG. 14 is a schematic cross-sectional view along line XIV-XIV in FIG. 9. FIG. FIG. 15 is a schematic plan view showing the structure in and around the housing space of the main body. FIG. 16 is a schematic front view showing the structure in and around the housing space of the main body. 17 is a schematic cross-sectional view along line segment XVII-XVII of FIG. 15. FIG. 18 is a schematic cross-sectional view along line segment XVIII-XVIII in FIG. 15. FIG. FIG. 19 is a schematic perspective view showing a cutting tool that has been released from being fixed in a liquid-tight state. 20 is a schematic cross-sectional view along line segment XX-XX in FIG. 19. FIG. 21 is a schematic cross-sectional view along line XXI-XXI in FIG. 19. FIG.

[Problems to be Solved by the Present Disclosure]
In order to grasp the state of the cutting tool during processing, a structure can be employed in which a sensor is installed on the cutting tool and information on the physical quantity detected by the sensor is transmitted to the outside via a wireless communication unit. In this case, it is necessary to install a battery in the cutting tool to supply power for driving the wireless communication unit. The battery can be easily replaced or charged by removing the cutting tool from a fixing device such as a chuck of the machine tool. However, the cutting tool is fixed by a fixing device with precise alignment. Therefore, releasing the fixation and realigning each time the battery is replaced or charged results in a decrease in the operating rate of the machine tool. In order to remove the battery without releasing the fixing of the cutting tool by the fixing device, it is necessary to facilitate removal of the battery from the cutting tool. It is an object of the present disclosure to facilitate removal of the battery from the cutting tool.

[Effect of the present disclosure]
According to the cutting tool of the present disclosure, removal of the battery from the cutting tool can be facilitated.

[Description of Embodiments of the Present Disclosure]
First, the embodiments of the present disclosure are listed and described. The cutting tool of the present disclosure is a cutting tool that cuts a workpiece by contacting the workpiece. This cutting tool includes a main body having a housing space for housing a battery, a lid member attachable to the main body so as to close the housing space, a sensor installed in the main body and detecting a physical quantity of the main body, a wireless communication unit that is installed in the main unit and transmits a signal including information on the physical quantity detected by the sensor to the outside. The lid member includes a holding portion that holds the battery. The body portion is installed on the wall surface defining the housing space and includes a terminal electrically connected to the battery.

In the cutting tool of the present disclosure, the lid member includes a holding portion that holds the battery. Therefore, the battery can be removed from the main body by removing the cover member from the main body. As a result, according to the cutting tool of the present disclosure, the removal of the battery from the cutting tool can be facilitated.

The cutting tool may further include a fixing member that fixes the lid member to the main body in a liquid-tight manner. At least one of the lid member and the main body includes a liquid-tight member that secures a liquid-tight state between the lid member and the main body, and a liquid-tight state between the lid member and the main body that is released when the fixing member releases the liquid-tight state. and a biasing member that biases them away from each other. With this configuration, a gap is formed between the cover member and the main body when the fixation by the fixing member is released, so that the cover member can be easily held. As a result, it becomes easier to remove the battery from the cutting tool.

In the cutting tool described above, the fixing member may include a separation inhibiting portion that inhibits separation from the lid member. With this configuration, it is possible to prevent the fixing member from falling off from the lid member when the lid member is removed from the main body. As a result, it becomes easier to remove the battery from the cutting tool.

In the cutting tool described above, the biasing member may include a spring. With this configuration, it is possible to easily achieve a structure in which the lid member and the main body are separated from each other by the biasing member.

In the cutting tool described above, the biasing member may further include a pressing member that separates the lid member and the body portion from each other as the spring expands. With this configuration, it is possible to more easily achieve a structure in which the lid member and the main body are separated from each other by the biasing member.

In the above cutting tool, the holding part may hold the battery so as to sandwich the battery in a direction crossing the positive and negative directions passing through the positive electrode and the negative electrode of the battery. With this configuration, it is possible to easily achieve a structure in which the holding portion is arranged at a position that does not interfere with the terminals that contact the positive and negative electrodes of the battery.

In the above cutting tool, the main body may have a rod-like shape extending from the first end to the second end, which is the end opposite to the first end. The accommodation space may be open on the outer peripheral surface of the main body. 2. Description of the Related Art When a cutting tool is fixed by a machine tool fixing device, it is often the case that the cutting tool is fixed with a portion of the outer peripheral surface of the rod-shaped main body portion exposed. Therefore, this configuration makes it easy to remove the battery without releasing the fixing of the cutting tool by the fixing device of the machine tool.

In the above cutting tool, the main body further includes a protrusion that prevents the positive electrode of the battery held by the holding portion of the lid member from coming into contact with the negative terminal that is to be electrically connected to the negative electrode of the battery. You can With this configuration, it is possible to prevent the positive electrode of the battery from accidentally contacting the negative terminal.

[Details of the embodiment of the present invention]
Next, embodiments of the cutting tool according to the present disclosure will be described below with reference to the drawings. In the drawings below, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

(1) Schematic Structure of Main Body FIG. 1 is a schematic perspective view showing the structure of a cutting tool. FIG. 2 is a schematic perspective view showing the structure of the cutting tool with the lid removed. FIG. 3 is a schematic plan view showing the structure of the cutting tool viewed in the X-axis direction from the first end side. FIG. 4 is a schematic plan view showing the structure of the cutting tool viewed in the X-axis direction from the second end side. FIG. 5 is a schematic cross-sectional view in the YZ plane along line segment VV in FIG. 6 is a schematic cross-sectional view in the YZ plane along the line VI-VI in FIG. 1. FIG.

Referring to FIGS. 1 to 4, cutting tool 1 of the present embodiment includes rod-shaped main body 10 extending from first end 10A to second end 10B. Although the shape of the body portion of the present disclosure is not particularly limited, for example, body portion 10 in the present embodiment has a rectangular parallelepiped shape. In the present application, the longitudinal direction of the body portion 10 is the X-axis direction, the width direction of the body portion 10 orthogonal to the X-axis direction is the Y-axis direction, and the height direction of the body portion orthogonal to the X-axis direction and the Y-axis direction is the Z-axis direction. As a direction, the following description will proceed.

The surface of the body portion 10 includes a first surface 11, a second surface 12, a third surface 13, a fourth surface 14, a fifth surface 15, and a sixth surface 16. I'm in. The first surface 11 includes a first region 11A, a third region 11C arranged on the first end portion 10A side of the first region 11A, and a step portion connecting the first region 11A and the third region 11C. and a second region 11B. A holding portion 19 that is a concave portion for holding the cutting tip 90 is formed in the first end portion 10A of the main body portion 10 . The holding portion 19 is opened in the third region 11C of the first surface 11, the fourth surface 14 and the fifth surface 15. As shown in FIG. A cutting tip 90 and a floor plate 81 are arranged on the holding portion 19 . The cutting tips 90 are stacked on the sole plate 81 . A fixing portion 82 for fixing the cutting tip 90 is arranged on the fourth surface 14 near the first end portion 10A. The cutting tip 90 is held by being sandwiched between the sole plate 81 and the fixing portion 82 . The cutting tip 90 is detachably fixed by a rotatable fixing portion 82 . The cutting tool 1 is a cutting tool that cuts a rotating workpiece by bringing the cutting tip 90 into contact with the workpiece. That is, the cutting tool 1 is a cutting tool used for turning.

Referring to FIG. 2, first surface 11 of body portion 10 is formed with first recess 11E extending over first region 11A, second region 11B and third region 11C. A second recess 12E is formed in the second surface 12 . A housing space 11F, which is a recess for housing the battery 61, is formed in the first area 11A of the first surface 11 on the second end 10B side as viewed from the first recess 11E. A battery 61 is accommodated in the accommodation space 11F.

(2) Structure of Sensor Section As shown in FIG. 2, the first substrate 51 is arranged in the first concave portion 11E. The first substrate 51 is arranged in the first recess 11E located in the first region 11A. A second substrate 52 is arranged in the second recess 12E. A third substrate 53 is arranged in the first concave portion 11E located in the third region 11C. Each of the first substrate 51, the second substrate 52, and the third substrate 53 includes a substrate body made of an insulating material such as resin, and a circuit pattern (made of a conductor such as copper) formed on the surface of the substrate body. not shown).

2 and 5, first recess 11E and second recess 12E are connected by first through hole 10D. A first through hole 10</b>D connecting the first surface 11 and the second surface 12 is formed in the main body 10 . As a result, in the longitudinal direction (X-axis direction) of the main body portion 10, the main body portion 10 includes the first surface 11 and the second surface 12, and the column portion 10E connecting both sides of the first through hole 10D is formed. contains.

2 and 5, first substrate 51 and second substrate 52 are electrically connected by flexible cable . The first board 51 , the second board 52 and the flexible cable 54 constitute the board module 50 . A first substrate 51 is a first portion of the substrate module 50 . A second substrate 52 is the second portion of the substrate module 50 . The flexible cable 54 is a connecting portion of the board module 50 . A flexible substrate may be employed as the connecting portion instead of the flexible cable 54 . A flexible cable 54 electrically connects the first substrate 51 and the second substrate 52 through the first through hole 10D. Also, cables or substrates other than flexible cables and flexible substrates may be employed as the connecting portions.

Referring to FIG. 2, first strain sensor 42 is arranged on first surface 11 . The first strain sensor 42 is arranged in the first recess 11E located in the first area 11A of the first surface 11 . A second strain sensor 45 is arranged on the second surface 12 . A second strain sensor 45 is arranged in the second recess 12E of the second surface 12 . An acceleration sensor 29 is arranged in the third area 11C of the first surface 11 . The acceleration sensor 29 is arranged inside the first recess 11E located in the third area 11C. Instead of or in addition to the acceleration sensor 29, a temperature sensor may be arranged in the third region 11C (on the third substrate 53 within the recess 11E). The temperature sensor is positioned closer to the first end 10A than the first strain sensor 42 and the second strain sensor 45. As shown in FIG.

A wiring 43 as a first wiring is connected to the first strain sensor 42 . The first strain sensor 42 and wiring 43 constitute the first strain sensor component 41 . A wiring 46 as a second wiring is connected to the second strain sensor 45 . The second strain sensor 45 and wiring 46 constitute the second strain sensor component 44 .

An AD converter 31, a wireless communication section 32, a connector 33, a connector 35, a connector 37, and a connector 38 are mounted on the first substrate 51 (on the circuit pattern of the first substrate 51). The connector 35, connector 38, AD converter 31, wireless communication unit 32, connector 33, and connector 37 are arranged in this order from the first end 10A to the second end 10B in the X-axis direction. . A connector 36 and a connector 34 are mounted on the second board 52 (on the circuit pattern of the second board 52). The connectors 36 and 34 are arranged in this order from the first end 10A to the second end 10B in the X-axis direction.

The wiring 46 is connected to the connector 36 . Thereby, the second strain sensor 45 is electrically connected to the second substrate 52 . A flexible cable 54 connects the connector 34 and the connector 33 . Thereby, the second substrate 52 and the first substrate 51 are electrically connected. The wiring 43 is connected to the connector 35 . Thereby, the first strain sensor 42 is electrically connected to the first substrate 51 . The connectors 39 and 38 are connected by wiring 55 . Thereby, the third substrate 53 and the first substrate 51 are electrically connected.

The connector 37 and the terminals in the housing space 11F are connected by wires 62 . Thereby, the battery 61 arranged in the housing space 11F is electrically connected to the first substrate 51 . Battery 61 supplies power to AD converter 31 , wireless communication unit 32 , first strain sensor 42 , second strain sensor 45 and acceleration sensor 29 . Details of the structure of the housing space 11</b>F of the main body 10 and the structure of the lid member 200 that closes the housing space 11</b>F and holds the battery 61 will be described later.

The first to third substrates 51, 52, 53 arranged on the surface of the main body 10, the AD converter 31 mounted on them, the wireless communication unit 32 and the connectors 33 to 39, the first strain sensor component 41, the 2, the strain sensor component 44 , the acceleration sensor 29 and the wiring 55 constitute the sensor section 20 .

(3) Lid Installation State Referring to FIGS. 1 and 2 , the cutting tool 1 includes a first lid 71 and a second lid 72 . The first lid 71 covers the first recess 11E. The second lid 72 covers the second recess 12E. The first lid 71 may be entirely made of resin, rubber or ceramics, or only partially made of resin, rubber or ceramics. If only a portion is made of resin, rubber or ceramics, the other portion of first lid 71 may be made of metal. The second lid 72 may be entirely made of resin, rubber or ceramics, or entirely made of metal. Only part of the second lid 72 may be made of resin, rubber or ceramics, and the other part may be made of metal.

2 and 6, body portion 10 includes a first bottom wall 111 and a second bottom wall 112. As shown in FIG. The first bottom wall 111 and the second bottom wall 112 form a wall surface that defines the first recess 11E. The second bottom wall 112 has a smaller distance from the opening of the first recess 11E than the first bottom wall 111 does. The second bottom wall 112 surrounds the first bottom wall 111 when the first recess 11E is viewed in the depth direction (Z-axis direction). The first strain sensor 42 and the first substrate 51 are arranged on the first bottom wall 111 . The first lid 71 is arranged on the second bottom wall 112 and accommodated in the first recess 11E. The first lid 71 may be adhered to the body portion 10 .

The body portion 10 includes a third bottom wall 121 and a fourth bottom wall 122 . The third bottom wall 121 and the fourth bottom wall 122 form a wall surface that defines the second recess 12E. The fourth bottom wall 122 has a smaller distance from the opening of the second recess 12E than the third bottom wall 121 does. The fourth bottom wall 122 surrounds the third bottom wall 121 when the second recess 12E is viewed in the depth direction (Y-axis direction). The second strain sensor 45 and the second substrate 52 are arranged on the third bottom wall 121 . The second lid 72 is arranged on the fourth bottom wall 122 and housed in the second recess 12E. The second lid 72 may be adhered to the body portion 10 .

(4) Structure of Lid Member Referring to FIGS. 1 and 2, the cutting tool 1 includes a lid member 200 attachable to the body portion 10 so as to close the housing space 11F. FIG. 7 is a schematic perspective view showing the lid member with the battery removed. FIG. 8 is a schematic perspective view showing the lid member with batteries attached. FIG. 9 is a schematic plan view showing the structure of the lid member viewed in the Z-axis direction. FIG. 10 is a schematic front view showing the structure of the lid member viewed in the Y-axis direction. FIG. 11 is a schematic bottom view showing the structure of the lid member viewed in the Z-axis direction. FIG. 12 is a schematic side view showing the structure of the lid member viewed in the X-axis direction. FIG. 13 is a schematic side view showing the structure of the lid member viewed from the opposite side of FIG. 12 in the X-axis direction. 14 is a schematic cross-sectional view in the YZ plane along the line XIV-XIV in FIG. 9. FIG.

7 to 14, lid member 200 includes a base portion 201, a holding portion 204, a first projection portion 207, and a second projection portion 208. As shown in FIG. A fixing screw 202 as a fixing member is attached to the lid member 200 .

The base portion 201 is a plate-like member having a rectangular shape when viewed in the Z-axis direction (see FIG. 9). Each of the four corners of the base portion 201 is formed with a recessed portion 201A having a thickness smaller than that of other portions. The concave portion 201A extends from the front surface side, which is the side opposite to the side on which the holding portion 204 is arranged in the thickness direction (Z-axis direction) of the base portion 201, to the rear surface side (the side on which the holding portion 204 is arranged). ) is a concave portion. A cylindrical female screw portion 201B that penetrates the base portion 201 in the thickness direction is formed in each region of the base portion 201 corresponding to the concave portion 201A (see FIG. 14). A through hole is also formed in the central portion of the base portion 201 when viewed in the Z-axis direction, and penetrates the base portion 201 in the thickness direction. With the cover member 200 attached to the main body 10, the pressure regulating valve 205 allows the passage of gas when the pressure difference between the inside and the outside of the housing space 11F becomes equal to or greater than a preset value. , has the function of reducing the pressure difference.

A positive electrode display 210A and a negative electrode display 210B are arranged on the rear surface of the base portion 201 so as to sandwich the pressure regulating valve 205 in the X-axis direction at the center in the Y-axis direction (see FIG. 11). A positive electrode display 210A and a negative electrode display 210B indicate the orientation of the battery 61 held by the lid member 200 . A notch 206 is formed in the center of the short side of the base portion 201 having a rectangular shape on the side where the positive electrode display 210A is arranged in the X-axis direction. Since the notch 206 indicates the positive electrode 61A side of the battery 61, even when the cover member 200 is viewed from the front surface side of the base portion 201, the directions of the positive electrode 61A and the negative electrode 61B of the battery 61 can be grasped. be able to.

The fixing screw 202 is inserted into each female screw portion 201B of the base portion 201 and arranged. As shown in FIGS. 10 and 12-14, the fixing screw 202 includes a head portion 202A, a shank portion 202B, and a threaded portion 202C. Referring to FIG. 14, head 202A has a disk-like shape with a larger diameter than female threaded portion 201B. The head portion 202A is arranged on the surface side of the base portion 201 . The thickness of the head 202A in the Z-axis direction is set substantially equal to or slightly smaller than the depth of the recess 201A. As a result, by pushing the fixing screw 202 from the surface side of the base portion 201 toward the back side, the top surface of the head portion 202A and the surface of the base portion 201 are flush with each other or the top surface of the head portion 202A is slightly aligned. It becomes sunken.

The shaft portion 202B has a rod-like shape that is connected to the head portion 202A and passes through the female screw portion 201B. The outer diameter of shaft portion 202B is smaller than the inner diameter of female thread portion 201B. The threaded portion 202C is a cylindrical portion arranged at the end of the shaft portion 202B opposite to the side connected to the head portion 202A. A spiral thread is formed on the outer peripheral surface of the threaded portion 202C. The threaded portion 202C is a male threaded portion. The threaded portion 202C can be screwed with the female threaded portion 201B. Therefore, although it is possible to remove the fixing screw 202 from the lid member 200 by rotating the fixing screw 202 in a state where the threaded portion 202C and the female threaded portion 201B are screwed together, such an operation is intentionally performed. The fixing screw 202 is not separated from the lid member 200 unless there is. In this manner, the diameter of the head portion 202A is set larger than that of the female threaded portion 201B, and the threaded portion 202C can be screwed with the female threaded portion 201B, so that the fixing screw 202 falls off from the base portion 201 of the lid member 200. is prevented. That is, the fixing screw 202 includes a head portion 202A and a threaded portion 202C as a separation inhibiting portion that inhibits separation from the lid member 200. As shown in FIG.

7 and 8 , holding portion 204 is a member for holding battery 61 . The holding portions 204 hold the battery 61 so as to sandwich the battery 61 in a direction (Y-axis direction) intersecting the positive and negative directions (X-axis direction) passing through the positive electrode 61A and the negative electrode 61B of the battery 61 . A pair of holding portions 204 are arranged apart from each other in the Y-axis direction. The holding portion 204 is connected to the base portion 201, and includes a pair of first portions 204A that rise parallel to each other along the Z-axis direction from the back surface of the base portion 201, and a pair of first portions 204A that extend in the X-axis direction, and a second portion 204B that connects the ends opposite to the side connected to the base portion 201 . The holding portion 204 is made of an elastic material such as resin or metal. Also, the pair of holding portions 204 are arranged at a distance slightly smaller than the width of the battery 61 in the Y-axis direction. When the battery 61 is inserted between the pair of holding portions 204, the pair of holding portions 204 bend in the Y-axis direction and hold the battery 61 by their elasticity.

The first protrusion 207 and the second protrusion 208 are separated by a distance corresponding to the length of the positive electrode 61A of the battery 61 excluding the protrusion in the positive and negative directions (X-axis direction) passing through the positive electrode 61A and the negative electrode 61B of the battery 61. are placed. The first projecting portion 207 and the second projecting portion 208 are connected to the base portion 201 and rise from the back surface of the base portion 201 . The first protrusion 207 and the second protrusion 208 have a plate-like shape and are arranged to face each other. A notch 207A on the positive electrode side is formed in the first projecting portion 207 . A negative electrode side notch 208A is formed in the second protrusion 208 . As shown in FIG. 7, in the Y-axis direction, the width _w1 of the positive electrode 61A of the battery 61 is smaller than the width _w2 of the positive electrode cutout 207A and larger than the width _w3 of the negative electrode cutout 208A. Therefore, even if the battery 61 held by the holding portion 204 is erroneously held so that the positive electrode 61A becomes the second projecting portion 208 in the opposite direction, the positive electrode 61A enters the negative electrode side notch 208A. I can't. That is, the second projecting portion 208 supports the correct orientation of the battery 61, and the positive electrode 61A of the battery 61 held by the holding portion 204 of the lid member 200 is electrically connected to the negative electrode 61B of the battery 61. contact with the negative terminal 223 to be directly connected.

Two annular protrusions 209, 209 surrounding the holding section 204, the first protrusion 207, and the second protrusion 208 are formed on the back surface of the base section 201 when viewed in the Z-axis direction. Of the two annular projections 209 , 209 , one annular projection 209 extends along the outer circumference of the other annular projection 209 and surrounds the other annular projection 209 . The two annular protrusions 209, 209 are ridge-shaped protrusions extending at regular intervals from each other. As will be described later, the two annular protrusions 209 and 209 form a liquid-tight state by being pressed against a rubber packing 119 as a liquid-tight member of the body portion 10 .

(5) Structure in and around accommodation space of main body Next, the structure in and around the accommodation space 11F of the main body 10 will be described. FIG. 15 is a schematic plan view showing the structure in and around the housing space 11F of the main body 10 viewed in the Z-axis direction. FIG. 16 is a schematic front view showing the structure in and around the accommodation space 11F of the main body 10 viewed in the Y-axis direction. 17 is a schematic cross-sectional view cut along the XVII-XVII plane in FIG. 15. FIG. 18 is a schematic cross-sectional view cut along the XVIII-XVIII plane in FIG. 15. FIG.

15 to 18, when viewed in the Z-axis direction (from the viewpoint of FIG. 15), the first surface 11 is adjacent to other regions of the first surface 11 so as to surround the accommodation space 11F. includes a fourth region 113 whose height in the Z-axis direction is smaller than that of . The fourth area 113 has a rectangular shape when viewed in the Z-axis direction. The body portion 10 has a protruding portion 11H having the same height as the other region of the adjacent first surface 11 in a region corresponding to the short side on the second end portion 10B side among the short sides of the fourth region 113. (see FIG. 15). The protruding portion 11</b>H is formed in a shape corresponding to a position corresponding to the notch 206 formed in the base portion 201 of the lid member 200 . This avoids attaching the cover member 200 holding the battery 61 in the wrong direction.

16 to 18, body portion 10 includes rubber packing 119 as a liquid-tight member. The surface of rubber packing 119 constitutes fourth region 113 . The rubber packing 119 has an annular shape surrounding the housing space 11F when viewed in the Z-axis direction. The rubber packing 119 is a sheet-like member made of rubber.

The height difference between the adjacent other region of the first surface 11 and the fourth region 113 corresponds to the thickness of the base portion 201 of the lid member 200 . Accordingly, when the lid member 200 is installed on the body portion 10, the surface of the lid member 200 and the surface of the body portion 10 are flush with each other. The accommodation space 11</b>F opens at a fourth region 113 that is the outer peripheral surface of the main body 10 .

A plurality of (specifically, four) cylindrical recesses 222 are formed in the fourth region 113 . The recess 222 is arranged at a position corresponding to the arrangement of the fixing screw 202 installed in the lid member 200 . The inner wall surface of the recess 222 is formed with a thread groove corresponding to the thread formed on the outer peripheral surface of the threaded portion 202</b>C of the fixing screw 202 . The recessed portion 222 includes a female threaded portion that can be screwed with the threaded portion 202C. The lid member 200 is placed on the fourth region 113 of the main body 10, and the threaded portion 202C of the fixing screw 202 and the female threaded portion of the recess 222 are screwed together, whereby the lid member 200 and the fourth region of the main body 10 are screwed together. A rubber packing 119 as a liquid-tight member positioned at 113 is in contact. At this time, the two annular protrusions 209 and 209 of the lid member 200 are pressed against the rubber packing 119 , and the rubber packing 119 is elastically deformed and the two annular protrusions 209 and 209 are pushed into the rubber packing 119 . As a result, the lid member 200 and the body portion 10 are brought into contact with each other in a liquid-tight manner. As a result, intrusion of liquid (for example, cutting fluid) into the housing space 11F from the outside is blocked. The fixing screw 202 is a fixing member that fixes the lid member 200 to the main body 10 in a liquid-tight state. The rubber packing 119 is a liquid-tight member that ensures a liquid-tight state between the lid member 200 and the body portion 10 . In the present embodiment, a case where rubber packing 119 as a liquid-tight member is included in body portion 10 has been described, but the liquid-tight member may be provided in lid member 200 instead of or in addition to this. may be placed.

17 and 18, body portion 10 includes an inner wall cover 225 that defines accommodation space 11F. Inner wall cover 225 is made of an insulator such as resin. The inner wall cover 225 includes a bottom wall portion 225A that defines the bottom wall of the accommodation space 11F, and side wall portions 225B that rise from the outer circumference of the bottom wall portion 225A and define the side walls of the accommodation space 11F. The main body 10 includes a positive terminal 224 and a negative terminal 223 that are installed on the wall defining the housing space 11F and electrically connected to the positive electrode 61A and the negative electrode 61B of the battery 61, respectively. The positive terminal 224 and the negative terminal 223 are held by the side wall portion 225B of the inner wall cover 225 and electrically connected to the wiring 62 (see FIG. 2). The positive terminal 224 and the negative terminal 223 are installed on the inner wall cover 225 facing each other in the X-axis direction.

Referring to FIG. 15, when viewed in the Z-axis direction, main body 10 includes a plurality of sets (here, two sets) of a pair of biasing members 221 facing each other across housing space 11F and arranged in the Y-axis direction. In the present embodiment, body portion 10 includes four biasing members 221 . As shown in FIG. 18, the biasing member 221 is held by the side wall portion 225B of the inner wall cover 225. As shown in FIG. The biasing member 221 includes a spring (helical spring) 227 arranged so that its axial direction is along the Z direction, and a pin 226 as a pressing member. Pin 226 includes an enlarged diameter portion 226A having a larger diameter than the other portions. The tip of the spring 227 in the Z direction (the end of the inner wall cover 225 opposite to the bottom wall portion 225A) and the enlarged diameter portion 226A are connected. As a result, the pin 226 can reciprocate in the Z-axis direction as the spring 227 expands and contracts in the axial direction. When the spring 227 is in its natural length, the tip of the pin 226 opposite to the spring 227 protrudes in the Z-axis direction from the fourth region 113 of the main body 10 to the opposite side to the spring 227 . On the other hand, when the lid member 200 is installed on the body portion 10 and the liquid-tight state between the lid member 200 and the body portion 10 is secured, the spring 227 is compressed, and the tip of the pin 226 and the lid member 200 are in contact with each other. The rear surface of the base portion 201 is in contact with the rear surface.

(6) Operation of Cutting Tool Referring to FIGS. 1 and 2, during operation of the cutting tool 1, the cutting tip 90 contacts the rotating workpiece, thereby to process. At this time, the strain of the body portion 10 is detected by the first strain sensor 42 and the second strain sensor 45 . Acceleration of the main body 10 is also detected by the acceleration sensor 29 . Signals containing strain and acceleration information detected by strain sensors 42 and 45 and acceleration sensor 29 are analog signals. The strain and acceleration information, which are analog signals, are converted to digital signals by the AD converter 31 and then transmitted to the outside by the wireless communication unit 32 . Here, since the first lid 71 is entirely or partially made of resin, rubber, or ceramics, the wireless communication section 32 can transmit signals to the outside through the first lid 71 . This signal is received externally and analyzed to grasp the state of the main unit 10 .

(7) Detachment of Battery and Effect of Present Embodiment Next, the detachment of the battery 61 and the effect of the present embodiment will be described. The battery 61 may be a dry battery or a rechargeable secondary battery. In the operation of the cutting tool 1 in (6) above, the battery 61 supplies power to the AD converter 31 and the wireless communication unit 32, and when replacement or charging is required, the battery 61 needs to be removed from the housing space 11F.

FIG. 19 is a schematic perspective view showing a cutting tool that has been released from being fixed in a liquid-tight state. 20 is a schematic cross-sectional view along line segment XX-XX in FIG. 19. FIG. 21 is a schematic cross-sectional view along line XXI-XXI in FIG. 19. FIG. 1 and 19, when the battery 61 is taken out from the storage space 11F, the lid member 200 is installed on the main body portion 10 as shown in FIG. In the liquid-tight state, the tightened fixing screw 202 is loosened, and the liquid-tight fixation of the cover member 200 and the body portion 10 by the fixing screw 202 is released. Then, as the compressed spring 227 returns to its natural length (see FIG. 18), the pin 226 presses the base portion 201 of the lid member 200 . Thereby, as shown in FIG. 19, the base portion 201 of the lid member 200 and the fourth region 113 of the main body portion 10 are separated from each other. The biasing member 221 biases the lid member 200 and the main body 10 in a direction to separate them from each other when the liquid-tight fixation by the fixing screw 202 is released. The pin 226 is a pressing member that separates the lid member 200 and the body portion 10 from each other as the spring 227 expands. As a result, a gap is formed between the lid member 200 and the body portion 10 , so that the operator can easily remove the lid member 200 from the body portion 10 . Furthermore, since the lid member 200 holds the battery 61, the battery 61 can be easily replaced and charged.

Attachment of the battery 61 after replacement or charging to the main body 10 can also be easily carried out in the reverse order of the removal described above. In the present embodiment, cover member 200 holding battery 61 after replacement or charging can be placed on fourth region 113 of main body 10 and fixing screw 202 can be easily tightened. Referring to FIG. 20 , recess 222 includes a female threaded portion 222A and an enlarged diameter threaded portion 222A disposed closer to the opening of recessed portion 222 than female threaded portion 222A (the side shallower than female threaded portion 222A in the depth direction of recessed portion 222). 222B. The female threaded portion 222A is a region in which a threaded groove that can be screwed with the threaded portion 202C of the fixing screw 202 is formed on the inner wall surrounding the recessed portion 222 as a space. The enlarged diameter portion 222B is a region having an inner diameter larger than the outer diameter of the threaded portion 202C of the fixing screw 202 .

20 and 21, when lid member 200 is placed on fourth region 113 of main body 10 and fixing screw 202 enters concave portion 222, base portion 201 and biasing member 221 of lid member 200 are locked together. , and the lid member 200 is supported by the biasing member 221 . The length of the fixing screw 202 is set so that the threaded portion 202C of the fixing screw 202 reaches the female threaded portion 222A of the recess 222 in this state. Therefore, the operator rotates the fixing screw 202 in the tightening direction without pushing down the lid member 200 against the elasticity of the spring 227 of the biasing member 221, thereby causing the threaded portion 202C of the fixing screw 202 and the concave portion 222 to close. 222 A of internal thread parts screw together. As a result, by further rotating the fixing screw 202 in the tightening direction, the lid member 200 and the body portion 10 approach each other and come into contact with each other. On the other hand, when the fixing screw 202 is rotated in the loosening direction, the elasticity of the spring 227 causes the cover member 200 to be pushed up by the pin 226 . When the fixing screw 202 is further rotated in the loosening direction, the threaded portion 202C of the fixing screw 202 and the female threaded portion 222A of the recess 222 are disengaged, and the threaded portion 202C reaches the enlarged diameter portion 222B. As a result, the lid member 200 can be removed. In the present embodiment, the case where the biasing member 221 is included in the main body portion 10 has been described. good.

Thus, in cutting tool 1 of the present embodiment, lid member 200 includes holding portion 204 that holds battery 61 . Therefore, the battery 61 can be taken out from the body portion 10 by removing the cover member 200 from the body portion 10 . As a result, removal of the battery 61 from the cutting tool 1 is facilitated.

The cutting tool 1 also includes a fixing screw 202 that fixes the lid member 200 to the main body 10 in a liquid-tight manner. The body portion 10 includes a rubber packing 119 that secures a liquid-tight state between the lid member 200 and the body portion 10, and the lid member 200 and the body portion 10 that are separated from each other when the fixation in the liquid-tight state by the fixing screws 202 is released. and a biasing member 221 that biases them away from each other. As a result, a gap is formed between the lid member 200 and the body portion 10 as the fixation by the fixing screw 202 is released, so that the lid member 200 can be easily held by the operator.

Furthermore, the fixing screw 202 includes a head portion 202A and a threaded portion 202C as a separation inhibiting portion that inhibits separation from the lid member 200. As shown in FIG. This prevents the fixing screw 202 from coming off the lid member 200 when the lid member 200 is removed from the main body 10 .

In addition, by adopting a structure including a spring 227 as the biasing member 221 and a pin 226 that separates the lid member 200 and the body portion 10 as the spring 227 expands, the lid member 200 and the body portion 10 are separated from each other. 10 are easily achieved.

Further, the holding portions 204 hold the battery 61 so as to sandwich the battery 61 in a direction (Y-axis direction) intersecting the positive and negative directions (X-axis direction) passing through the positive electrode 61A and the negative electrode 61B of the battery 61 . As a result, a structure is easily achieved in which the holding portion 204 is arranged at a position that does not interfere with the terminals (the positive terminal 224 and the negative terminal 223) in contact with the positive electrode 61A and the negative electrode 61B of the battery 61. FIG.

Moreover, the housing space 11</b>F is open on the outer peripheral surface of the main body 10 . When the cutting tool 1 is fixed by the fixing device of the machine tool, it is often fixed in a state in which a part of the outer peripheral surface of the main body 10 having a rod-like shape is exposed. Therefore, this configuration makes it easy to remove the battery 61 without releasing the fixing of the cutting tool 1 by the fixing device of the machine tool.

Furthermore, the body portion 10 prevents the positive electrode 61A of the battery 61 held by the holding portion 204 of the lid member 200 from contacting the negative electrode side terminal 223 to be electrically connected to the negative electrode 61B of the battery 61. 3 protrusions 225C are included. The third projecting portion 225C is a portion of the side wall portion 225B of the inner wall cover 225 that projects along the X-axis direction (longitudinal direction of the main body portion 10). This makes it possible to prevent the positive electrode 61A of the battery 61 from accidentally contacting the negative electrode terminal 223 .

(Modification)
In the above embodiment, the case where the acceleration sensor 29 is arranged on the first surface 11 has been described. However, the acceleration sensor 29 may be arranged on one or more of the second surface 12, the third surface 13 and the fourth surface 14 in addition to the first surface 11, may be placed in In the above embodiment, the case where the strain sensors are installed on the first surface 11 and the second surface 12 has been described. However, the strain sensors may be arranged on any one or more of the first to fourth surfaces, and may be arranged on all the surfaces. Further, the substrates (the first portion, etc.) constituting the substrate module may be arranged on any one or more of the first to fourth surfaces, or may be arranged on all the surfaces. . Further, in the above-described embodiment, the substrate module is arranged on two of the first to fourth surfaces. may be placed in The arrangement of these sensors and the configuration of the board module can be combined arbitrarily. For example, one substrate (first portion, etc.) and one strain sensor constituting the substrate module may be arranged on three of the first to fourth surfaces, or may be arranged on four surfaces (all surfaces). ). Further, the concave portions such as the first concave portion 11E and the second concave portion 12E formed on the surface of the main body portion 10 may be filled with a filler (for example, a resin filler).

(Appendix)
In the cutting tool of the present disclosure, a fixing member, a lid member, and a biasing member are provided so that the lid member can be fixed to the main body in a liquid-tight state without an operator pushing down the lid member against the elasticity of the spring. The member may be constructed.

It should be understood that the embodiments disclosed this time are illustrative in all respects and are not restrictive in any aspect. The scope of the present invention is defined by the scope of the claims rather than the above description, and is intended to include all changes within the meaning and scope of equivalence to the scope of the claims.

Reference Signs List 1 cutting tool 10 main body 10A first end 10B second end 10D first through hole 10E column 11 first surface 11A first region 11B second region 11C Third region 11E First recess 11F Housing space 11H Projection 12 Second surface 12E Second recess 13 Third surface 14 Fourth surface 15 Fifth surface 16 Third 6 surface, 19 holding part, 20 sensor part, 29 acceleration sensor, 31 AD converter, 32 wireless communication part, 33 to 39 connector, 41 first strain sensor part, 42 first strain sensor, 43 wiring, 44 second 2 strain sensor parts 45 second strain sensor 46 wiring 50 substrate module 51 first substrate 52 second substrate 53 third substrate 54 flexible cable 55 wiring 61 battery 61A positive electrode , 61B Negative electrode, 62 Wiring, 71 First lid, 72 Second lid, 81 Bottom plate, 82 Fixing part, 90 Cutting tip, 111 First bottom wall, 112 Second bottom wall, 113 Fourth region, 119 Rubber packing, 121 third bottom wall, 122 fourth bottom wall, 200 lid member, 201 base portion, 201A recessed portion, 201B female screw portion, 202 fixing screw, 202A head portion, 202B shaft portion, 202C screw portion, 204 holding Part 204A First part 204B Second part 205 Pressure regulating valve 206 Notch 207 First protrusion 207A Positive electrode side notch 208 Second protrusion 208A Negative electrode side notch 209 Annular protrusion 210A Positive indicator 210B Negative indicator 221 Biasing member 222 Recess 222A Internal thread 222B Expanded diameter portion 223 Negative terminal 224 Positive terminal 225 Inner wall cover 225A Bottom wall 225B Side wall 225C Third protrusion, 226 pin, 226A enlarged diameter portion, 227 spring.

Claims (8)

A cutting tool that cuts a workpiece by contacting the workpiece,
a main body having a housing space for housing a battery;
a lid member attachable to the main body so as to block the accommodation space;
a sensor installed in the main body and detecting a physical quantity of the main body;
a wireless communication unit that is installed in the main body and transmits a signal containing information on the physical quantity detected by the sensor to the outside,
The lid member is
including a holding portion that holds the battery,
The main body is
including a terminal installed on a wall surface defining the housing space and electrically connected to the battery,
By removing the lid member from the main body, the battery is removed from the main body while being held by the holding portion of the lid member ,
The main body has a rod-like shape extending from a first end to a second end opposite to the first end,
the surface of the main body portion includes an outer peripheral surface that is a surface extending to connect the first end portion and the second end portion;
The cutting tool , wherein the housing space opens at the outer peripheral surface of the main body . 2. The cutting tool according to claim 1, wherein the body portion is fixed to the machine tool so that a region of the outer peripheral surface where the housing space opens is exposed. A cutting tool that cuts a workpiece by contacting the workpiece,
a main body having a housing space for housing a battery;
a lid member attachable to the main body so as to block the accommodation space;
a sensor installed in the main body and detecting a physical quantity of the main body;
a wireless communication unit that is installed in the main body and transmits a signal containing information on the physical quantity detected by the sensor to the outside,
The lid member is
including a holding portion that holds the battery,
The main body is
including a terminal installed on a wall surface defining the housing space and electrically connected to the battery,
By removing the lid member from the main body, the battery is removed from the main body while being held by the holding portion of the lid member,
The cutting tool is
further comprising a fixing member that fixes the lid member to the main body in a liquid-tight state;
At least one of the lid member and the main body,
a liquid-tight member that ensures a liquid-tight state between the lid member and the main body;
a biasing member that biases the lid member and the main body in a direction to separate them from each other when the liquid-tight fixation by the fixing member is released. The cutting tool according to claim 3 , wherein the fixing member includes a separation inhibiting portion that inhibits separation from the lid member. 5. A cutting tool according to claim 3 or 4 , wherein the biasing member comprises a spring. 6. The cutting tool according to claim 5 , wherein the biasing member further includes a pressing member that separates the lid member and the body portion from each other as the spring expands. The cutting tool according to any one of claims 1 to 4 , wherein the holding portion holds the battery so as to sandwich the battery in a direction intersecting a positive and negative direction passing through the positive electrode and the negative electrode of the battery. The main body further includes a protrusion that prevents the positive electrode of the battery held by the holding portion of the lid member from coming into contact with a negative electrode terminal that is to be electrically connected to the negative electrode of the battery. The cutting tool according to any one of claims 1 to 4 .

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