JP7057313B2 - Machine tools with motors, including coolers - Google Patents

Description

The present invention relates to a machine tool including an electric motor including a cooler.

The motor includes a rotor and a stator disposed around the rotor. For example, a magnet is arranged in the rotor and a coil is arranged in the stator. It is known that an electric motor generates heat when driven. For example, it is known that when an electric motor is driven, the stator generates heat. For this reason, it is preferable that the electric motor is provided with a mechanism for cooling the electric motor.

In the prior art, it is known to place a cooler, including blades and a fan motor, at the end of the motor to supply cooling air. By driving the cooler, air flows along the outer peripheral surface of the motor body. It is known that the main body of the motor is cooled by this air flow (for example, JP-A-2015-144539, JP-A-2005-94949, and JP-A-2007-337621).

Japanese Unexamined Patent Publication No. 2015-144539 Japanese Unexamined Patent Publication No. 2005-94949 Japanese Unexamined Patent Publication No. 2007-336721

The motor includes a casing that supports the rotor and stator. In the motor, the casing is fixed to another device. By the way, the device to which the casing is fixed may vibrate. For example, in a machine tool, the work is machined while at least one of the work and the tool is rotating. A motor is arranged in the machine tool to rotate a tool or workpiece. The shaft of the motor is connected to a spindle that supports the tool or workpiece. Then, the motor is fixed to the housing that supports the spindle.

By machining a work with a machine tool, vibration occurs in the tool or work. In the motor of the conventional technique, the cooler is fixed to the casing of the motor body. The vibration generated by processing the work is transmitted to the motor body via the spindle and the housing that supports the spindle. The vibration transmitted to the motor body is transmitted to the cooler fixed to the casing of the motor body. In this way, when the motor is attached to a device that generates vibration, the vibration may be transmitted to the cooler.

When the cooler vibrates, the blades of the cooler or the bearings of the fan motor that rotates the blades may be damaged. Alternatively, the power lines that supply electricity to the fan motor may rub against each other and the power lines may be disconnected. In this way, the vibration of the motor body may cause the cooler to fail.

The machine tool of one aspect of the present disclosure includes a motor, a spindle head that is rotated by the rotational force of the motor and supports a tool or a workpiece, and a spindle support member that rotatably supports the spindle. The machine tool is formed so as to surround the spindle head and includes wall members constituting the processing chamber. The motor includes a motor body that includes a rotor and a stator, and a cooler that includes blades and a fan motor that rotates the blades. The motor includes a tubular member that connects the cooler and the motor body. The motor body has a flow path through which air flows. The cooler is located away from the motor body. The tubular member is made of a flexible material. In the tubular member, one open end is fixed to the motor body and the other open end is fixed to the cooler. The rotor is connected to the spindle. The motor body is fixed to the spindle support member and moves as the work is machined. The wall member has a hole that takes in air from the outside of the wall member. The cooler is fixed to the wall member so that air can flow through the holes. When the cooler is driven, the air that has passed through the tubular member flows into the flow path to cool the motor body.

A machine tool of another aspect of the present disclosure supports an electric motor , a spindle that rotates by the rotational force of the electric motor to support a tool or a workpiece, a spindle support member that rotatably supports the spindle, and a spindle support member. , A member to be erected from the base . The motor includes a motor body including a rotor and a stator, a cooler including blades and a fan motor that rotates the blades, and a tubular member connecting the cooler and the motor body. The motor body has a flow path through which air flows. The cooler is located away from the motor body. The tubular member is made of a flexible material. In the tubular member, one open end is fixed to the motor body and the other open end is fixed to the cooler. The rotor is connected to the spindle. The motor body is fixed to the spindle support member and moves as the work is machined. The cooler is fixed to a member erected from the base. When the cooler is driven, the air that has passed through the tubular member flows into the flow path to cool the motor body.

According to the aspect of the present disclosure, it is possible to provide a machine tool that suppresses a failure of a cooler of an electric motor .

It is a perspective view of the 1st motor in an embodiment. It is a partial cross-sectional view of the first motor. It is a top view of the cooler of a motor. It is a schematic partial sectional view of the 1st machine tool in embodiment. It is a schematic partial sectional view of the spindle head of the 1st machine tool. It is a perspective view of the 2nd motor in an embodiment. It is a partial sectional view of the 2nd motor. It is a schematic partial sectional view of the 2nd machine tool in embodiment. It is a schematic partial sectional view of the 3rd machine tool in embodiment. It is a partial cross-sectional view of the 4th motor in embodiment. It is a side view of the 4th machine tool in embodiment. FIG. 3 is a partial cross-sectional view of a fifth motor according to an embodiment.

The electric motor and the machine tool including the electric motor in the embodiment will be described with reference to FIGS. 1 to 12. The motor as an electric motor in the present embodiment includes a motor main body as an electric motor main body and a cooler that supplies cooling air to the motor main body.

FIG. 1 shows a perspective view of the first motor of the present embodiment. FIG. 2 shows a partial cross-sectional view of the first motor of the present embodiment. FIG. 3 shows a plan view of the cooler of the motor of the present embodiment. With reference to FIGS. 1 to 3, the first motor 1 of the present embodiment includes a motor body 10 and a cooler 41 that generates an air flow to cool the motor body 10. Further, the motor 1 includes a tubular member 31 that connects the cooler 41 and the motor body 10. The space inside the tubular member 31 constitutes a flow path through which air flows when the cooler 41 is driven.

The motor body 10 includes a rotor 11 and a stator 12. The stator 12 includes, for example, a stator core 18 formed of a plurality of magnetic steel plates laminated in the axial direction. A coil 16 is wound around the stator core 18. The rotor 11 includes a shaft 13 formed in a rod shape, a rotor core 17 fixed to the outer peripheral surface of the shaft 13, and a magnet arranged inside the rotor core 17. The shaft 13 extends along the rotation shaft 99 of the rotor 11. The shaft 13 is connected to another member in order to transmit a rotational force. In the present embodiment, the side in which the shaft 13 is connected to another member in the extending direction of the rotating shaft 99 of the shaft 13 is referred to as a front side. Further, the side opposite to the front side is referred to as a rear side. In the examples shown in FIGS. 1 and 2, the direction indicated by the arrow 90 corresponds to the front side of the motor 1.

The motor body 10 includes a front housing 21 and a rear housing 22. The housings 21 and 22 are formed in a tubular shape. The stator 12 is fixed to the housings 21 and 22 by fastening members such as bolts. The housings 21 and 22 rotatably support the shaft 13 via bearings 14 and 15. A bearing support member 26 that supports the bearing 15 is fixed to the housing 22. A covering member 27 is arranged on the front side of the bearing 14 so that foreign matter does not enter the inside of the motor body 10. At the rear end of the shaft 13, an encoder 19 for detecting the rotation position or the rotation speed of the shaft 13 is arranged.

The motor body 10 includes a housing cover 23 fixed to the rear end of the housing 22. The housing cover 23 closes the space surrounded by the housings 21 and 22. The rotor 11 and the bearings 14 and 15 are arranged inside the space surrounded by the housings 21 and 22 and the housing cover 23. The motor body 10 includes a rear cover 25 fixed to an open end on the rear side of the housing 22. The rear cover 25 is formed in a cylindrical shape so as to surround the housing cover 23. The end of the rear cover 25 of the motor body 10 is open. On the outside of the housing 22, a terminal box 29 to which a power line for driving the motor 1 and a communication line are connected is arranged.

The cooler 41 includes a blade 42 and a fan motor 43 that rotates the blade 42. The cooler 41 includes a case 44 to which the fan motor 43 is fixed. A hole 44a is formed on the end surface of the case 44 on the side opposite to the side to which the tubular member 31 is connected. The hole 44a functions as a suction port through which air flows.

The motor body 10 of the present embodiment is formed with a flow path through which air flows. The space between the rear cover 25 and the housing cover 23 constitutes a flow path through which air flows. Further, the rear housing 22 is formed with a hole portion 22a extending along the axial direction of the shaft 13. The stator core 18 is formed with a hole portion 18a extending along the axial direction of the shaft 13. The hole portion 18a is formed so as to penetrate from one end face of the stator core 18 to the other end face. The front housing 21 is formed with a hole 21a extending along the axial direction of the shaft 13. The hole 22a of the housing 22, the hole 18a of the stator core 18, and the hole 21a of the housing 21 are formed so as to communicate with each other. In this way, the space through which the hole portion 22a, the hole portion 18a, and the hole portion 21a communicate with each other forms a flow path through which air flows. Such flow paths are formed at a plurality of locations along the circumferential direction of the motor body 10.

The tubular member 31 has a plurality of slide members 31a. The slide member 31a is formed in a cylindrical shape so that the ends on both sides are open. The slide members 31a adjacent to each other are formed so as to be in contact with each other. As the slide members 31a slide against each other, the tubular member 31 expands and contracts along the extending direction of the tubular member 31, as shown by the arrow 95.

The tubular member in this embodiment is made of a flexible material. Further, the tubular member is made of a deformable material. The tubular member can be formed of, for example, an elastic member or a flexible member. The tubular member 31 of the first motor 1 is made of rubber. The tubular member is preferably made of a material that does not allow air to pass through in order to form an air flow path. As the material of the tubular member 31, resin or the like can be adopted in addition to rubber.

The tubular member 31 has both ends open. In the tubular member 31, one open end 31b is fixed to the motor body 10, and the other open end 31c is fixed to the cooler 41. The tubular member 31 is connected to the motor body 10 so as to supply air to the inside of the motor body 10. The open end 31b of the tubular member 31 is connected to the open end of the rear cover 25. The open end 31c of the tubular member 31 is connected to the open end of the case 44 of the cooler 41. The tubular member 31 is connected to the motor body 10 so that the air flowing by driving the cooler 41 does not leak from the connection portion between the tubular member 31 and the motor body 10. Further, the tubular member 31 is connected to the case 44 so that the air flowing by the drive of the cooler 41 does not leak from the connection portion between the tubular member 31 and the case 44.

The cooler 41 in the present embodiment supplies air toward the motor body 10. When the fan motor 43 is driven, the blades 42 rotate to generate an air flow as shown by the arrow 91. Air flows into the inside of the motor body 10 through the space inside the tubular member 31. The air that has flowed into the inside of the motor body 10 flows through the air flow path formed in the motor body, as shown by the arrow 92. Then, the air is discharged to the outside from the hole portion 21a formed in the housing 21 on the front side. Since the air flow path of the first motor 1 penetrates the stator core 18, the stator 12 can be effectively cooled.

The cooler 41 in the present embodiment is formed so as to blow out air toward the inside of the tubular member 31, but is not limited to this form. The cooler may be formed so as to blow out air toward the side opposite to the tubular member. In this configuration, air flows in the motor body in the direction opposite to the direction indicated by the arrow 92.

In the motor 1 of the present embodiment, the front housing 21 is fixed to another device. Here, the motor 1 may be fixed to a device that generates vibration, and the vibration may be transmitted to the motor body 10. The cooler 41 in the present embodiment is arranged away from the motor main body 10. The cooler 41 is connected to the motor body 10 via a flexible tubular member 31. With this configuration, the vibration of the motor body 10 is damped by the tubular member 31. The tubular member 31 can suppress the vibration of the motor body 10 from being transmitted to the cooler 41. Therefore, it is possible to prevent the blade 42 of the cooler 41 from being damaged by the vibration of the motor body 10. In addition, damage to the bearings arranged inside the fan motor 43 can be suppressed. Further, it is possible to prevent the wirings of the cooler 41 from rubbing against each other due to vibration and causing disconnection. In this way, it is possible to prevent the vibration of the motor body 10 from being transmitted to the cooler 41 and causing the cooler 41 to fail.

Further, since the air flow path is formed by the tubular member 31, it is possible to suppress the diffusion of the air supplied by the cooler 41. All the air supplied by the cooler 41 can be supplied to the motor body 10. As a result, the motor body 10 can be effectively cooled. Further, the tubular member in the present embodiment has a simple structure and can be easily replaced.

The tubular member 31 of the first motor 1 is formed so as to expand or contract along the extending direction of the tubular member 31. By adopting this configuration, the length of the tubular member 31 in the extending direction can be easily adjusted. The motor 1 of the present embodiment can be fixed to various devices. Alternatively, as will be described later, since the length of the tubular member 31 changes, the motor body 10 can be fixed to a device that moves in the axial direction of the shaft 13.

FIG. 4 shows a schematic partial cross-sectional view of the first machine tool according to the present embodiment. The first motor 1 of the present embodiment is arranged on the spindle head 55 of the first machine tool 5 of the present embodiment.

The machine tool 5 includes a bed 51 as a base and a column 52 erected from the bed 51. A Y-axis guide rail 56 extending in the Y-axis direction is arranged on the upper surface of the bed 51. A saddle 53 is arranged on the Y-axis guide rail 56. The saddle 53 is formed so as to move along the Y-axis guide rail 56 as shown by the arrow 93. An X-axis guide rail 57 extending in the X-axis direction is arranged on the upper surface of the saddle 53. A table 54 is arranged on the X-axis guide rail 57. The table 54 is formed so as to move along the X-axis guide rail. The work 89 is fixed to the table 54.

The machine tool 5 includes a spindle head 55 that rotates the tool 66 while holding the tool 66. A Z-axis guide rail 58 extending in the Z-axis direction is arranged on the front surface of the column 52. The spindle head 55 is engaged with the Z-axis guide rail 58. The spindle head 55 is formed so as to move along the Z-axis guide rail 58 as shown by the arrow 94.

The machine tool 5 of the present embodiment is a numerically controlled type. The machine tool 5 includes a moving device that moves the work or tool along the feed axis. The moving device includes a feed shaft motor arranged corresponding to each feed shaft. The moving device drives the feed shaft motor based on the operation program. In the machine tool 5 of the present embodiment, the spindle head 55, the saddle 53, and the table 54 move. Therefore, the relative position of the tool 66 with respect to the work 89 can be changed while machining the work 89. By moving the tool 66 relative to the work 89 in this way, the work 89 can be machined into various shapes.

The feed shaft of the machine tool 5 of the present embodiment is composed of three linear motion shafts (X-axis, Y-axis, and Z-axis). The feed shaft of the machine tool 5 is not limited to this form, and may be configured from any linear motion shaft or rotary feed shaft.

When the work 89 is processed, chips are generated. Further, when the work 89 is machined, a cutting fluid is supplied in order to cool the work 89 and reduce the friction between the work 89 and the tool 66. The machine tool 5 has a processing chamber surrounded by a splash guard 61 in order to prevent scattering of chips and cutting fluid. The splash guard 61 is a wall member formed so as to surround the spindle head 55, the saddle 53, and the table 54. The spindle head 55 is arranged inside the processing chamber of the machine tool 5.

FIG. 5 shows a schematic partial cross-sectional view of the spindle head in the present embodiment. With reference to FIGS. 4 and 5, the spindle head 55 includes a spindle 64 that supports the tool 66 and a motor 1 that rotates the spindle 64. The spindle head 55 includes a housing 67 as a spindle support member that rotatably supports the spindle 64.

The tool 66 is supported by the spindle 64 via the tool holder 65 and the tool support member 69. The tool support member 69 is supported by the spindle 64 by being inserted into the spindle 64. The spindle 64 is connected to the shaft 13 of the motor 1 via the connecting member 63. The spindle head 55 has a bearing 71 that supports the spindle 64. The bearing 71 is supported by the housing 67. The spindle 64 is rotated by the rotational force of the motor 1. By driving the motor 1, the tool 66 rotates around the axis of the spindle 64.

The first motor 1 in the present embodiment is fixed to the housing 67. The motor 1 is arranged so that the rotation shaft 99 of the shaft 13 extends in the vertical direction. The cooler 41 is preferably fixed to a member different from the member to which the motor body 10 is fixed. The cooler 41 of the motor 1 of the present embodiment is fixed to the splash guard 61. The splash guard 61 is formed with a hole 61a for air to flow through. Air flows through the hole 61a of the splash guard 61 and the hole 44a of the case 44.

When machining the work 89, vibration occurs in the tool 66. The vibration generated in the tool 66 is transmitted to the spindle 64 and the housing 67 via the tool support member 69. Further, the vibration is transmitted from the spindle 64 and the housing 67 to the motor body 10. As a result, vibration occurs in the motor body 10. However, the vibration of the motor body 10 is damped in the flexible tubular member 31. Therefore, it is possible to prevent the vibration of the motor body 10 from being transmitted to the cooler 41 and causing the cooler 41 to fail.

Further, in the first machine tool 5, the cooler 41 can supply air outside the processing chamber. Therefore, air containing no foreign matter such as dust or droplets of cutting fluid can be supplied to the motor body 10. The cooler may be arranged so as to supply the air inside the processing chamber to the motor body.

Further, the tubular member 31 of the motor 1 expands and contracts along the direction in which the tubular member 31 extends. The housing 67 of the spindle head 55 moves in the vertical direction as shown by the arrow 94. The motor body 10 also moves in the vertical direction. The tubular member 31 expands and contracts as the motor body 10 moves. The length of the tubular member 31 changes while ensuring an air flow path. Therefore, even if the housing 67 and the motor body 10 move during the processing period, air can be stably supplied to the motor body 10.

The tubular member 31 of the first motor 1 has a mechanism for changing the axial length of the tubular member 31, but is not limited to this form. The tubular member may not have a mechanism for changing its shape. In this case, a mechanism for moving the cooler in the direction in which the housing of the spindle head moves can be arranged between the cooler and the splash guard. For example, a duct that expands and contracts can be placed between the cooler and the splash guard.

Further, the spindle head may move in the horizontal direction such as the X-axis direction or the Y-axis direction. In this case, for example, a device for moving the cooler in the horizontal direction can be arranged between the cooler and the splash guard. When the spindle head 55 moves in the Y-axis direction, a rail extending in the Y-axis direction can be arranged on the splash guard. Then, the cooler can be suspended from the rail and moved in the Y-axis direction. In this case, the cooler can supply the air inside the processing chamber to the motor body without being fixed to the splash guard.

FIG. 6 shows a perspective view of the second motor according to the present embodiment. FIG. 7 shows a partial cross-sectional view of the second motor according to the present embodiment. The configuration of the motor body 10 and the cooler 41 of the second motor 2 is the same as that of the motor body 10 and the cooler 41 of the first motor 1. In the second motor 2, the configuration of the tubular member is different from that of the first motor 1.

The tubular member 32 of the second motor 2 is made of a material that can be deformed into an arbitrary shape. The tubular member 32 is curved in any direction. The tubular member 32 can be formed of, for example, a sheet woven with resin threads, a resin sheet made of vinyl or the like, a cloth or the like. In this way, the tubular member 32 can change its shape with a simple configuration. When the tubular member 32 is formed of cloth, it is preferable that a treatment such as applying a resin to the surface is performed so that air does not pass through.

Also in the second motor 2, when the vibration is transmitted to the motor main body 10, the vibration can be damped by the tubular member 32. Since the transmission of vibration from the motor body 10 to the cooler 41 can be suppressed, the failure of the cooler 41 can be suppressed.

Further, since the tubular member 32 changes to an arbitrary shape, the degree of freedom in the position of the cooler 41 with respect to the motor body 10 increases. The cooler 41 can be fixed to various parts. In addition, the cooler 41 can be oriented in various directions. Further, the relative position of the motor body 10 with respect to the cooler 41 can be changed within the range in which the tubular member 32 can be deformed.

FIG. 8 shows a schematic partial cross-sectional view of the second machine tool according to the present embodiment. A second motor 2 is arranged on the spindle head 55 of the second machine tool 6. The column 52 of the second machine tool 6 has an extension 52a. The extension portion 52a protrudes to the side where the spindle head 55 is arranged. The cooler 41 of the motor 2 is fixed to the extension portion 52a. The tubular member 32 is deformed corresponding to the position of the cooler 41. In the second machine tool 6, the suction port of the cooler 41 is arranged so as to face the horizontal direction. In this way, the tubular member 32 is deformed according to the position of the cooler 41 and the position of the motor body 10, so that the cooler 41 can be fixed at various positions. Further, when the housing 67 of the spindle head 55 moves as shown by the arrow 94, the tubular member 32 is deformed and the air flow path can be secured.

With reference to FIGS. 4 and 8, in the first machine tool 5 and the second machine tool 6, the cooler 41 is a component of the machine tools 5 and 6, other than the housing 67 as the spindle support member. It is fixed to the member of. The vibration of the spindle 64 is transmitted to the housing 67. Therefore, even if the cooler 41 is fixed to the housing 67, the vibration of the tool 66 is transmitted to the cooler 41 via the housing 67. However, by fixing the cooler 41 to a member other than the spindle support member, it is possible to suppress the transmission of vibration to the cooler 41. As a result, the failure of the cooler 41 can be effectively suppressed.

In the above-mentioned machine tools 5 and 6, the cooler 41 is fixed to the constituent members of the stationary machine tools 5 and 6, but the present invention is not limited to this form. The cooler may be fixed to a moving component. Alternatively, the cooler may be mounted on the machine tool component without being fixed to the machine tool component. That is, the cooler may be supported by the constituent members of the machine tool. Furthermore, the cooler may be fixed or mounted on the floor.

In the second machine tool 6, the cooler 41 is arranged so that the hole 44a of the case 44 faces sideways. In this way, the second motor 2 can arrange the cooler 41 in any direction. For example, a hole for inserting the power line of the fan motor may be formed in the casing of the fan motor. Foreign matter may enter through this hole and cause the fan motor to malfunction. In the second motor, the direction of the cooler can be determined so that the hole through which the power line is inserted faces downward. With this configuration, it is possible to prevent foreign matter from entering through a hole through which the power line of the fan motor is inserted and causing the fan motor to fail.

FIG. 9 shows a schematic partial cross-sectional view of the third machine tool according to the present embodiment. In the third machine tool 7, the third motor 3 is arranged on the spindle head 55. The configuration of the tubular member of the third motor 3 is different from that of the first motor 1. The third motor 3 has a tubular member 33. In the third machine tool 7, the cooler 41 is supported by the tubular member 33 without being fixed to the constituent members constituting the machine tool 7.

The cooler 41 is arranged away from the motor body 10. The tubular member 33 is made of a hard material having elasticity. For example, the tubular member 33 is made of hard rubber. The tubular member 33 has a conical cross-sectional shape. The cooler 41 is supported only by the tubular member 33. By adopting this configuration, the tubular member 33 moves together with the motor body 10. The configuration of the motor arranged on the spindle head 55 that moves in a predetermined direction and a predetermined movement amount can be simplified. For example, in the example shown in FIG. 9, the motor body 10 can be moved in the Z-axis direction by an arbitrary amount of movement.

In the spindle head of the above embodiment, the spindle that supports the tool is connected to the shaft of the motor, but the present invention is not limited to this embodiment. The tubular member of the present embodiment can also be applied to a spindle head in which the shaft of the motor has the function of a spindle. For example, the rotor core can be arranged on the outer peripheral surface of the spindle corresponding to the shaft of the motor. The stator can be arranged so as to face the rotor core. The tubular member of the present embodiment can also be arranged in such a built-in type motor.

FIG. 10 shows a partial cross-sectional view of the fourth motor according to the present embodiment. The fourth motor 4 has a tubular member configuration different from that of the first motor 1. The fourth motor 4 includes a tubular member 34 having a bellows structure. The tubular member 34 is made of, for example, rubber. The tubular member 34 is formed so as to bend in an arbitrary direction. Further, the tubular member 34 is formed so as to have elasticity in the extending direction of the tubular member 34. The tubular member 34 is formed so that when the cooler 41 is separated from the motor main body 10, a force that returns the cooler 41 toward the motor main body 10 acts. That is, the tubular member 34 has elasticity so as to shrink as shown by the arrow 96. Also in the fourth motor 4, the vibration of the motor body 10 can be damped by the tubular member 34, and the failure of the cooler 41 can be suppressed.

FIG. 11 shows a side view of the fourth machine tool according to the present embodiment. The fourth machine tool 8 is a lathe. FIG. 11 shows a portion of the lathe that holds and rotates the work 89. The machine tool 8 includes a fourth motor 4. In the fourth machine tool 8, the rotational force output by the motor body 10 of the motor 4 is transmitted to the spindle 87 via the belt 86.

The machine tool 8 has a base 81 and a spindle device 82 fixed to the base 81. A spindle 87 is inserted inside the spindle device 82. The spindle device 82 includes a housing 88 as a spindle support member that rotatably supports the spindle 87. A chuck 83 for gripping the work 89 is connected to one end of the spindle 87. In this way, the spindle may be formed so as to support the work.

A pulley 85 is fixed to the other end of the spindle 87. The motor 4 is arranged away from the spindle device 82. In particular, the motor body 10 is arranged away from the housing 88 of the spindle device 82. A pulley 84 is fixed to the shaft 13 of the motor 4. The belt 86 is arranged so as to transmit the rotational force of the pulley 84 to the pulley 85.

In the machine tool 8, the work 89 is machined by bringing a tool such as a cutting tool or a drill into contact with the work 89. The vibration generated in the work 89 is transmitted to the spindle 87 of the spindle device 82 and the housing 88. The vibration of the spindle 87 may be transmitted to the motor body 10 via the belt 86. The tubular members 31, 32, 33, 34 of the present embodiment can also be adopted in such a motor that transmits the rotational force of the shaft of the motor body to the main shaft by a belt.

A tubular member 34 is arranged on the motor 4 of the fourth machine tool 8. The tubular member 34 is fixed to the motor body 10. The cooler 41 is supported by the tubular member 34 without being fixed to the constituent members of the machine tool 8. The cooler 41 is suspended from a tubular member 34. In the machine tool 8, when the vibration is transmitted to the motor main body 10, the vibration can be damped by the tubular member 34. Therefore, the failure of the cooler 41 can be suppressed.

In the machine tool 8, the hole portion 44a of the case 44 of the cooler 41 faces downward. Therefore, it is possible to prevent foreign matter from entering through the hole 44a of the case 44. For example, dust or the intrusion of dust can be suppressed. Alternatively, the foreign matter that has entered the tubular member 34 can be discharged from the hole 44a due to the influence of gravity.

FIG. 12 shows a partial cross-sectional view of the fifth motor according to the present embodiment. In the motors 1, 2, 3 and 4 described above, a flow path through which air flows is formed inside the stator core 18. The flow path through which the air flows is not limited to this form, and any configuration capable of cooling the motor body can be adopted.

The fifth motor 9 includes a motor body 20 as a transmitter body. The end of the rear cover 25 is closed without opening. The motor body 20 includes a part of the housing 21, a stator 12, a housing 22, and a flow path component 35 formed so as to cover the rear cover 25. A flow path through which air flows is formed inside the flow path constituent member 35. The flow path component 35 is in contact with a part of the housing 21, the stator 12, the housing 22, and the rear cover 25.

When the cooler 41 is driven, air flows from the tubular member 32 to the internal flow path of the flow path constituent member 35 as shown by the arrow 92. Since the flow path constituent member 35 is in contact with the housings 21 and 22, the stator 12, and the rear cover 25, the motor body 20 can be cooled. In particular, since the flow path constituent member 35 is in contact with the outer peripheral surface of the stator 12, the stator 12 can be effectively cooled.

The motor in the present embodiment is arranged in a machine tool, but is not limited to this embodiment, and can be arranged in any machine in which vibration occurs.

The above embodiments can be combined as appropriate. In each of the above figures, the same or equal parts are designated by the same reference numerals. It should be noted that the above embodiment is an example and does not limit the invention. Further, in the embodiment, the modification of the embodiment shown in the claims is included.

1,2,3,4,9 Motor 5,6,7,8 Machine tool 10,20 Motor body 11 Rotor 12 Stator 13 Shaft 18 Stator core 18a Hole 21,22 Housing 22a Hole 23 Housing cover 25 Rear cover 31,32 , 33, 34 Tubular member 31b, 31c Open end 35 Flow path component 41 Cooler 42 Blade 43 Fan motor 52 Column 52a Extension 55 Main shaft head 61 Splash guard 64 Main shaft 66 Tool 67 Housing 87 Main shaft 88 Housing 89 Work

Claims (5)

A spindle head including a motor, a spindle that is rotated by the rotational force of the motor to support a tool or a workpiece, and a spindle support member that rotatably supports the spindle.
It is provided with a wall member that is formed so as to surround the spindle head and constitutes a processing chamber.
The motor includes a motor body including a rotor and a stator, a cooler including blades and a fan motor that rotates the blades, and a tubular member connecting the cooler and the motor body.
The motor body has a flow path through which air flows.
The cooler is arranged away from the motor body and
The tubular member is made of a flexible material, one end of which is fixed to the motor body and the other end of which is fixed to the cooler.
The rotor is connected to the spindle and
The motor body is fixed to the spindle support member and moves as the work is machined.
The wall member has a hole for taking in air from the outside of the wall member.
The cooler is fixed to the wall member so that air can flow through the hole.
A machine tool in which, when the cooler is driven, air that has passed through the tubular member flows into the flow path to cool the motor body. The machine tool according to claim 1, wherein the tubular member is formed so as to expand or contract along an extending direction of the tubular member. The machine tool according to claim 1, wherein the tubular member is made of a material that can be deformed into an arbitrary shape. With an electric motor
A spindle that rotates by the rotational force of the motor and supports the tool or workpiece,
A spindle support member that rotatably supports the spindle and
A member that supports the spindle support member and is erected from the base is provided.
The motor includes a motor body including a rotor and a stator, a cooler including blades and a fan motor that rotates the blades, and a tubular member connecting the cooler and the motor body.
The motor body has a flow path through which air flows.
The cooler is arranged away from the motor body and
The tubular member is made of a flexible material, one end of which is fixed to the motor body and the other end of which is fixed to the cooler.
The rotor is connected to the spindle and
The motor body is fixed to the spindle support member and moves as the work is machined.
The cooler is fixed to a member erected from the base, and is fixed to the member.
A machine tool in which, when the cooler is driven, air that has passed through the tubular member flows into the flow path to cool the motor body . The machine tool according to claim 4, wherein the tubular member is made of a material that can be deformed into an arbitrary shape.

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