Control panel and machine tool

Abstract

The present application provides a control panel and a machine tool capable of preventing a fan from being wrapped in foreign matters. A control panel (20) houses electrical components for controlling a machine tool inside a housing box (21). A heat dissipation mechanism, a fan (50), and a cover (30) are provided on a left wall (202) of the housing box (21) of the control panel (20). A part of the heat dissipation mechanism is arranged inside the housing box (21) and connected with the electrical components. The fan (50) is fixed to the left side of the left wall (202) of the control panel (20) via a housing. The fan (50) is located at the lower side of the heat dissipation mechanism. The fan (50) sends air to the heat dissipation mechanism via the housing. The cover (30) covers the outside of the fan (50). A left wall (301) of the cover (30) has an opening part (31) as an air inlet of the fan (50). The opening part (31) is provided around an opposite part (310) of the left wall (301) opposite to the fan (50).

Description

Technical Field

[0001] This invention relates to control panels and machine tools. Background Technology

[0002] The machine tool described in Patent Document 1 includes a control panel. The control panel houses electrical components. A heat sink is located on the side of the control panel to cool the electrical components housed within it. A heat sink enclosure covers the heat sink enclosure. A fan introduces air into the heat sink enclosure.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-221609 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the aforementioned machine tools, to prevent rod-shaped foreign objects (such as screwdrivers) from being drawn into the fan, there are cases where a mesh-like fan guard is installed at the air inlet of the fan. Even in this case, there are still cases where rod-shaped foreign objects can enter through gaps in the mesh, causing the fan to be drawn into the fan.

[0008] The purpose of this invention is to provide a control panel and machine tool that can prevent foreign objects from being drawn into the fan.

[0009] Solution for solving the problem

[0010] The first technical solution of the present invention provides a control panel, characterized in that the control panel comprises: electrical components that control a machine tool; a storage box for storing the electrical components; a fan disposed on the outside of a predetermined wall of the storage box; and a cover that covers the outside of the fan, the cover having an opening around an opposite portion opposite to the fan.

[0011] In the control panel of the first technical solution, the opening is located around the opposite part, so even if a rod-shaped foreign object enters the inside of the cover through the opening, the fan can be prevented from drawing the foreign object in.

[0012] In the first technical solution, the control panel may also include a heat dissipation mechanism connected to the electrical components. A portion of this heat dissipation mechanism is located on the outer side of the predetermined wall. The fan is arranged in a manner parallel to the predetermined wall along a predetermined direction. The opening is in a position other than the clamping position, which is the position between the fan and the heat dissipation mechanism in the predetermined direction in which they are arranged. In the control panel, since the opening is not in the clamping position, interference between the airflow introduced by the fan through the opening and the airflow delivered from the fan towards the heat dissipation mechanism can be suppressed. Therefore, the control panel can effectively release heat from the electrical components through the heat dissipation mechanism.

[0013] In the first technical solution, the opening may also be located on at least one side of the opposite portion in the intersecting direction that intersects the predetermined direction. Since the control panel has an opening on at least one side of the opposite portion in the intersecting direction, the cover can be miniaturized.

[0014] In the first technical solution, the cover may also cover the outside of the heat dissipation mechanism and have an outlet on the side opposite to the fan, separated from the heat dissipation mechanism, in the predetermined direction, allowing the cover to open. In the control panel, the fan delivers air through the outlet located on the side opposite to the fan, separated from the heat dissipation mechanism, and exhausts the air after passing through the heat dissipation mechanism to the outside of the cover. Since the temperature inside the cover does not rise, the control panel can effectively release heat from the electrical components from the heat dissipation mechanism.

[0015] The second technical solution of the present invention provides a machine tool, characterized in that the machine tool includes a control panel as described in any one of technical solutions 1 to 4. The machine tool of the second technical solution can achieve the same effect as the first technical solution. Attached Figure Description

[0016] Figure 1 This is a 3D view of machine tool 1.

[0017] Figure 2 This is a 3D view of control panel 20.

[0018] Figure 3 This is the left view of control panel 20.

[0019] Figure 4 This is a left view of the control panel 20 after the cover 30 has been removed.

[0020] Figure 5 yes Figure 3 The cross-sectional view shown is along line II in the viewing direction.

[0021] Figure 6 yes Figure 5A magnified view of the area around the housing 40 shown.

[0022] Figure 7 This is a three-dimensional view of the shell 40 viewed from the lower left.

[0023] Figure 8 This is a three-dimensional view of the shell 40 viewed from the upper left. Detailed Implementation

[0024] The following describes embodiments of the present invention. In the following description, left and right, front and back, and up and down are used as indicated by the arrows in the figures. The left and right, front and back, and up and down directions of the machine tool 1 are the X-axis, Y-axis, and Z-axis directions of the machine tool 1, respectively.

[0025] Reference Figure 1 The structure of machine tool 1 is described below. Machine tool 1 is a vertical machine tool with a spindle (not shown) extending along the Z-axis. Machine tool 1 includes a base 2, a column 5, a spindle head 8, a main body cover 3, and a control panel 20. The base 2 is an iron base. The column 5 is vertically mounted on the upper rear of the base 2. A Z-axis moving mechanism (not shown) is arranged on the front surface of the column 5. The spindle head 8 is positioned in front of the Z-axis moving mechanism. The spindle head 8 can move along the Z-axis direction via the Z-axis moving mechanism.

[0026] The spindle head 8 supports the spindle in a manner that allows it to rotate around a rotation axis parallel to the Z-axis. A cutting tool (not shown) is mounted on the spindle to perform cutting operations on a workpiece (not shown) fixed to the upper surface of the worktable (not shown). The worktable is positioned at the upper front of the base 2. The main body cover 3 is fixed to the upper part of the base 2, surrounding the spindle and the worktable.

[0027] Reference Figures 2-8 The structure of the control panel 20 is explained. The control panel 20 includes a storage box 21. The storage box 21 is a roughly rectangular parallelepiped shape with a front wall 201 and a left wall 202. The storage box 21 has a right mounting portion 22 and a left mounting portion 23 on the outer side of the front wall 201. The right mounting portion 22 is located on the right side of the front wall 201, and the left mounting portion 23 is located on the left side of the front wall 201. The right mounting portion 22 and the left mounting portion 23 extend vertically and protrude forward from the front wall 201. The right mounting portion 22 and the left mounting portion 23 are fixed to the rear of the column 5. The storage box 21 stores various electrical components of the machine tool 1. These electrical components include, for example, the input / output board 93 (see reference). Figure 5 ), control board 94 (reference) Figure 5 DC switching power supplies, circuit breakers, inverters, wiring conduits, servo amplifiers, etc.

[0028] The storage box 21 has a door 203 on the side opposite to the column 5. When inspecting, for example, the control panel 20, the operator opens the door 203 to inspect, replace, or repair the various electrical components stored in the storage box 21. The door 203 has a handle 24 on the lower left. The door 203 is locked and unlocked by the handle 24, and the operator holds the handle 24 when opening the door 203.

[0029] like Figures 2-4 Thus, the control panel 20 has a cover 30, a heat dissipation mechanism 90, a housing 40, an upper cover 60, and a wire insertion part 70 on its left wall 202. The cover 30 covers the heat dissipation mechanism 90, the housing 40, and the fan 50 around the outside of the storage box 21 (see reference). Figure 3 , Figure 4 ).

[0030] Cover 30 has a flat left wall 301, a rear wall 302, and a front wall 303 (see reference). Figure 5 Fixing parts 304 and 305 are provided. The left wall 301 extends vertically and horizontally. The rear wall 302 protrudes to the right from the rear end of the left wall 301, and the front wall 303 protrudes to the right from the front end of the left wall 301. Fixing part 304 protrudes rearward from the right end of the rear wall 302, and fixing part 305 protrudes forward from the right end of the front wall 303. Fixing parts 304 and 305 are installed in the center of the left wall 202 of the storage box 21 to fix the cover 30.

[0031] The cover 30 has multiple openings 31 extending vertically and penetrating horizontally on the lower part of the left wall 301. These openings 31 serve as air inlets for the fan 50, which will be described later. The openings 31 are located around the opposing portion 310 on the lower part of the left wall 301, opposite to the fan 50 (see reference). Figure 3 , Figure 6 In this embodiment, the plurality of openings 31 are located on the front and rear sides of the opposing portion 310, respectively. The opening 31 located on the rear side of the opposing portion 310 is called the rear opening 311, and the opening 31 located on the front side of the opposing portion 310 is called the front opening 312.

[0032] The upper part of the left wall 301 has multiple outlets 321 extending in the front-back direction and penetrating in the left-right direction. The upper parts of the rear wall 302 and the upper parts of the front wall 303 have multiple outlets 322 and 323 extending in the left-right direction and penetrating in the front-back direction (see reference). Figure 5 Multiple exhaust ports 321-323 are located on the upper side of the external heat dissipation mechanism 901 described later.

[0033] like Figure 4 , Figure 5Thus, the heat dissipation mechanism 90 is disposed in the center of the left wall 202. The heat dissipation mechanism 90 is a heat sink having multiple heat dissipation fins extending in the vertical and horizontal directions. The heat dissipation mechanism 90 is disposed in the center of the left wall 202, extending through it in the horizontal direction. The heat dissipation mechanism 90 has an external heat dissipation mechanism 901 and an internal heat dissipation mechanism 902. The external heat dissipation mechanism 901 is disposed on the outside of the storage box 21, and the internal heat dissipation mechanism 902 is disposed on the inside of the storage box 21. The internal heat dissipation mechanism 902 is connected to the electrical components housed in the storage box 21.

[0034] like Figure 4 , Figures 6-8 Thus, the housing 40 is arranged side by side with the external heat dissipation mechanism 901 on the outside of the storage box 21, below the external heat dissipation mechanism 901, and the housing 40 is generally rectangular in shape. The housing 40 has wall portions 401, 403-405, fixing portions 406-408, hollow portion 43, first opening portion 41, second opening portion 42, intersecting wall portions 44, and plug 46.

[0035] The wall portions 401, 403-405, and the fixing portions 406-408 are flat. The hollow portion 43 is disposed within the space enclosed by the wall portions 401, 403-405. The wall portion 401 extends in both vertical and horizontal directions. The wall portion 401 is positioned to the left of the external heat dissipation mechanism 901 in the left-right direction (see reference). Figure 6 The first opening 41 opens in the left-right direction at the center of the wall portion 401 and communicates with the hollow portion 43. The fan 50, described later, is fixed on the left side of the wall portion 401 in a manner that covers the first opening 41.

[0036] Wall portion 403 protrudes to the right from the rear end of wall portion 401, wall portion 404 protrudes to the right from the front end of wall portion 401, and wall portion 405 protrudes to the right from the lower end of wall portion 401. A second opening 42 is disposed within the space enclosed by the upper ends of walls 401, 403, and 404. The second opening 42 provides an opening to the heat dissipation mechanism 90 of the housing 40 and communicates with the hollow portion 43. The second opening 42 is located slightly above the lower end of the external heat dissipation mechanism 901.

[0037] Fixing part 406 protrudes rearward from the right end of wall part 403, fixing part 407 protrudes forward from the right end of wall part 404, and fixing part 408 protrudes downward from the right end of wall part 405. Fixing parts 406 to 408 are installed on the left wall 202 of storage box 21 to fix housing 40.

[0038] The cross-wall portion 44 is a flat plate that protrudes to the left from the upper end of the wall portion 401 and extends in the front-to-back direction. The cross-wall portion 44 extends to the left to near the left wall 301 of the cover 30 (see reference). Figure 6The rear end of the cross wall portion 44 is positioned rearward of the rear end of the wall portion 401, and the front end of the cross wall portion 44 is positioned forward of the front end of the wall portion 401. The wall portion 405 has a hole 45 at its rear, which opens vertically and communicates with the hollow portion 43. The inner wall of the hole 45 is threaded. The plug 46 has an external thread and engages with the thread of the hole 45, thereby closing the hole 45.

[0039] The fan 50 is, for example, an axial flow fan. A metal protective mesh 51 is provided at the left end of the fan 50. The metal protective mesh 51 prevents larger foreign objects from entering the fan 50. The fan 50 draws in ambient air and directs it to the right.

[0040] The upper cover 60 is configured to cover the upper side of the cover 30. A gap exists between the upper cover 60 and the cover 30 in the vertical direction. After protruding from the left wall 202 of the storage box 21 in the left-right direction, the upper cover 60 bends and extends vertically, and is plate-shaped extending in the front-back direction. The wire insertion part 70 has a (not shown) insertion hole extending through the left wall 202 in the left-right direction, through which a wire electrically connecting electrical components inside the storage box 21 to external devices is inserted and held. The upper cover 60 supports the wire.

[0041] This describes the airflow within the housing 30. When the machine tool 1 is running, various electrical components inside the housing 21 generate heat. Therefore, the heat dissipation mechanism 90 releases heat by driving the fan 50, thereby cooling the electrical components. The fan 50 draws air from the outside of the housing 30 through multiple openings 31, etc., and directs the air to the right. The air delivered by the fan 50 flows through the first opening 41 into the hollow portion 43 and through the second opening 42 outwards from the housing 40.

[0042] The airflow to the outside of the housing 40 flows upward and passes through the interior of the external heat dissipation mechanism 901. At this time, the heat dissipation mechanism 90 releases heat using the air supplied by the fan 50, cooling the electrical components inside the storage box 21 connected to the heat dissipation mechanism 90. The air that has passed through the interior of the external heat dissipation mechanism 901 flows outward from the gap between the upper cover 60 and the cover 30 through multiple exhaust ports 321-323. A portion of the air flowing to the outside of the housing 40 is sometimes drawn back to the housing 40 side, but the cross wall portion 44 prevents the fan 50 from reintroducing the air drawn back to the housing 40 side.

[0043] As described above, in machine tool 1, control panel 20 is positioned behind column 5. Control panel 20 includes a storage box 21. The storage box 21 internally houses electrical components such as input / output board 93 and control board 94, which control machine tool 1. A heat dissipation mechanism 90, a fan 50, and a cover 30 are disposed on the left wall 202 of the storage box 21 of control panel 20. The internal heat dissipation mechanism 902, located inside the storage box 21, is connected to the electrical components. Fan 50 is fixed to the left side of the left wall 202 via housing 40. Fan 50 is positioned below the external heat dissipation mechanism 901 located outside the storage box 21. Fan 50 supplies air to the external heat dissipation mechanism 901 via housing 40. Cover 30 covers the outside of fan 50. Cover 30 has an opening 31 serving as an air supply port for fan 50. The opening 31 is located around the opposing portion 310 of the left wall 301, which is opposite to the fan 50. Therefore, even if a rod-shaped foreign object enters from the outside of the cover 30 through the opening 31, the control panel 20 can prevent the fan 50 from being entrained by the foreign object.

[0044] In the control panel 20, a front opening 312 is provided on the front side of the opposite part 310, and a rear opening 311 is provided on the rear side of the opposite part 310. Since the front opening 312 and the rear opening 311 are arranged in a front-to-back position around the opposite part 310, intersecting the vertical direction of the arrangement of the fan 50 and the heat dissipation mechanism 90, the control panel 20 can make the cover 30 miniaturized.

[0045] In the above embodiments, the input / output board 93 and the control board 94 are examples of electrical components of the present invention. The left wall 202 is an example of a predetermined wall. The vertical direction is an example of a predetermined direction. The front-back direction is an example of a cross direction.

[0046] The present invention can be modified in various ways based on the above embodiments. The various modifications described below can be combined separately as long as they do not contradict each other. For example, in the present invention, the machine tool 1 of the above embodiment is a vertical machine tool with the spindle extending along the Z-axis direction, but the present invention can also be applied to a horizontal machine tool with the spindle extending along the horizontal direction.

[0047] The heat dissipation mechanism 90, fan 50, and cover 30 can also be configured on the outer wall of the storage box 21 other than the left wall 202. The fan 50 and the heat dissipation mechanism 90 can be configured on different outer walls of the storage box 21. In this case, the control panel 20 can also have a duct that directs the airflow from the fan 50 towards the heat dissipation mechanism 90. The cover 30 only needs to cover the fan 50 and does not need to cover the heat dissipation mechanism 90.

[0048] The opening 31 can be positioned around the opposing portion 310 in the left wall 301, allowing for various changes in its placement. For example, the opening 31 can be positioned in any location other than the clamping position (above the opposing portion 310) between the fan 50 and the heat dissipation mechanism 90 in the vertical direction. That is, the opening 31 can be positioned below the opposing portion 310. When the opening 31 of the cover 30 is not positioned in the clamping position, the control panel 20 can suppress interference between the air introduced by the fan 50 through the opening 31 and the air delivered from the fan 50 toward the heat dissipation mechanism 90. Therefore, the control panel 20 can effectively release heat from the electrical components from the heat dissipation mechanism 90 through the air delivered by the fan 50.

[0049] In the above embodiment, a rear opening 311 is provided on the rear side of the opposite portion 310 of the cover 30, and a front opening 312 is provided on the front side of the opposite portion 310 of the cover 30. However, it is also possible to provide only at least one of the rear opening 311 and the front opening 312. The air supply port of the fan 50 may also be provided outside the opening 31 of the left wall 301 of the cover 30. For example, the air supply port of the fan 50 may be provided at the lower part of the rear wall 302 and the lower part of the front wall 303 of the cover 30.

[0050] Alternatively, multiple outlets 321-323 may not be provided on the cover 30. In this case, the air delivered by the fan 50 only needs to be discharged to the outside of the cover 30 through the gap between the upper cover 60 and the cover 30. In the above embodiment, the cover 30 is open in the vertical direction, but either the upper or lower end of the cover 30 can be closed. When the lower end of the cover 30 is closed, the lower end of the cover 30 can receive the mist-like liquid such as cutting flux splashed during the cutting process of the machine tool 1. Therefore, the convenience of the control panel 20 is improved.

[0051] The housing 40 is not limited to the above-described embodiment, as long as it can fix the fan 50 and introduce the airflow from the fan 50 into the interior and then discharge it to the heat dissipation mechanism 90. For example, the housing 40 may also be approximately octahedral in shape. Parts of the housing 40 may also be formed by curved surfaces.

[0052] Alternatively, the fan 50 can be fixed to the wall portion 403-405 of the housing 40. In this case, the first opening 41 is disposed in the wall portion 403-405 for fixing the fan 50. The housing 40 may also have an opening communicating with the hollow portion 43, other than the first opening 41, the second opening 42, and the hole 45.

[0053] The second opening 42 of the housing 40 may not cover the lower end of the heat dissipation mechanism 90. When the housing 40 and the heat dissipation mechanism 90 are configured far apart, a vertically extending rectifier plate, used to prevent the airflow from the second opening 42 from expanding inside the shroud 30, may be provided between the housing 40 and the heat dissipation mechanism 90 in the left wall 202 of the control panel 20. The housing 40 may also be located elsewhere than below the heat dissipation mechanism 90. In this case, it is desirable that the heat sink fins of the heat dissipation mechanism 90 extend in a direction that allows the airflow from the second opening 42 to pass through the interior of the heat dissipation mechanism 90.

[0054] The housing 40 may also omit the cross wall portion 44. Alternatively, instead of the cross wall portion 44, a flat wall protruding to the left from the bottom and extending in the front-rear direction may be provided in the heat dissipation mechanism 90. A flat wall protruding inward (to the right) towards the bottom of the heat dissipation mechanism 90 and extending in the front-rear direction may also be provided in the cover 30. The wall portion 405 may also omit the hole 45. A plug 46 is an example of sealing the hole 45; alternatively, a door sliding on the outside of the wall portion 405 may seal the hole 45. Alternatively, a nut with internal threads may be fixed to the wall portion 405, and a bolt with external threads may be used instead of the plug.

[0055] Explanation of reference numerals in the attached figures

[0056] 1. Machine tool; 20. Control panel; 21. Storage box; 30. Cover; 31. Opening; 40. Housing; 41. First opening; 42. Second opening; 43. Hollow part; 44. Cross wall part; 45. Hole; 46. Plug; 50. Fan; 90. Heat dissipation mechanism; 93. Input / output board; 94. Control board; 202, 301. Left wall; 301. Opposite part; 311. Rear opening; 312. Front opening; 321-323. Exhaust outlet; 401, 405. Wall part.

Claims

1. A control panel, characterized in that, This control panel has the following features: Electrical components, which control the machine tool; A storage box for storing the electrical components; A heat dissipation mechanism, which is connected to the electrical components, is partially disposed on the outside of a predetermined wall of the storage box; The housing is arranged side by side with the portion of the heat dissipation mechanism located on the outside of the storage box, and the housing has a plurality of walls and a hollow portion disposed inside the space enclosed by the plurality of walls; A fan, mounted on a mounting portion that serves as the wall portion, the mounting portion being disposed on the outer side of the predetermined wall; and A cover that covers the outside of the fan. The cover has an opening around the opposite portion relative to the fan, and the opposite portion extends parallel to the mounting portion. The periphery of the opposing portion is parallel to the mounting portion. The housing has: A first opening, which opens into the mounting portion and communicates with the hollow portion; and The second opening provides an opening to the heat dissipation mechanism side of the housing, and this second opening communicates with the hollow portion. The arrangement direction of the fan and the first opening intersects the arrangement direction of the fan and the second opening. The second opening allows partial passage of the heat dissipation mechanism. The housing has a cross wall portion that protrudes from the mounting portion toward the outside of the housing to the vicinity of the cover at a portion of the mounting portion that is closer to the heat dissipation mechanism than the fan, and extends in a direction that intersects the arrangement direction of the fan and the heat dissipation mechanism.

2. The control panel according to claim 1, characterized in that, The fan is arranged in a manner that is parallel to the heat dissipation mechanism along a predetermined direction. The opening is located around the opposite portion at a position other than the clamping position, which is the position between the fan and the heat dissipation mechanism in the predetermined direction.

3. The control panel according to claim 2, characterized in that, The opening is located on at least one side of the opposite part in the direction of intersection with the predetermined direction.

4. The control panel according to claim 2 or 3, characterized in that, The cover covers the outside of the heat dissipation mechanism and has an outlet on the side opposite to the fan in the predetermined direction, across the heat dissipation mechanism, that allows the cover to open.

5. A machine tool, characterized in that, The machine tool is equipped with a control panel as described in any one of claims 1 to 4.

Images