Workstation device

Abstract

A table device is provided with a ball screw including an external screw member extending in an axial direction, and an internal screw member engaged with the external screw member and capable of moving in the axial direction by rotation of the external screw member; a sliding device that supports the internal screw member so as to be movable; and a fixing member that fixes the sliding device, the fixing member having a first wall portion extending in a first direction on a cross section including an axis of the external screw member, and a second wall portion extending in a second direction intersecting the first direction.

Description

Technical Field

[0001] This disclosure relates to a workbench device. Background Technology

[0002] In measuring devices and machine tools, it is known to have a worktable device (sliding device) that includes a ball screw and a sliding worktable. Patent Document 1 discloses a worktable device (sliding device) that includes a guide rail that is approximately U-shaped in cross section orthogonal to the screw of the ball screw and a sliding member that is slidably supported in the guide rail.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2005-325880 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] The guide rail of Patent Document 1 has a roughly U-shaped cross-section, which makes it possible to increase the overall size of the worktable device (sliding device).

[0008] The purpose of this disclosure is to provide a workbench device that further reduces the overall size of the apparatus.

[0009] Solution for solving the problem

[0010] To achieve the above objectives, a worktable device according to the present disclosure includes: a ball screw comprising an axially extending external threaded member and an internal threaded member engaging with the external threaded member and capable of moving along the axial direction by rotation of the external threaded member; a sliding device supporting the internal threaded member for movable movement; and a fixing member fixing the sliding device, the fixing member having a first wall portion extending along a first direction in a cross section orthogonal to the axis of the external threaded member and a second wall portion extending along a second direction intersecting the first direction.

[0011] Thus, the fixing member has a first wall portion extending in a first direction and a second wall portion extending in a second direction. In contrast, the sliding device of Patent Document 1 has a roughly U-shaped guide rail in a cross-section orthogonal to the ball screw, thus potentially leading to a larger overall device size. However, the fixing member of this solution has both a first wall portion and a second wall portion, thus offering the advantage of a smaller overall device compared to the sliding device of Patent Document 1.

[0012] As a desired technical solution for the workbench device, the first wall portion has a first surface and a second surface located on the opposite side of the first surface, the second wall portion has a third surface and a fourth surface located on the opposite side of the third surface, and on a cross section orthogonal to the axis of the external thread member, the first surface and the third surface are arranged opposite each other across a semi-straight line extending in a third direction that intersects the first direction and the second direction, starting from the intersection of the first wall portion and the second wall portion, the first surface and the third surface are respectively provided with a support member that supports the external thread member to be rotatable, and the sliding device is provided on the fourth surface.

[0013] Thus, a support member for the external threaded component is fixed on the first surface of the first wall, and a sliding device is provided on the fourth surface of the second wall. Therefore, by distributively fixing the constituent parts of the worktable device to the first and second walls, the overall device is miniaturized.

[0014] As a desired technical solution for the worktable device, the worktable device also includes a drive source for driving the external threaded member to rotate. The sliding device has: a plate-shaped member that extends along the axial direction and fixes the internal threaded member; a linear guide that extends along the axial direction and is fixed to the second wall portion; and a sliding member that is fixed to the plate-shaped member and slidably supported on the linear guide. The fixed position of the internal threaded member on the plate-shaped member is a position away from the drive source compared to the center of the axial direction of the plate-shaped member.

[0015] Therefore, when the internally threaded member moves towards the drive source side, interference between the drive source and the internally threaded member is suppressed. Thus, compared to Patent Document 1, the end of the plate-shaped member on the drive source side of this technical solution is positioned closer to the drive source side. Consequently, the axial sliding range of the plate-shaped member in this technical solution becomes larger.

[0016] As a desired technical solution for the worktable device, the drive source is fixed to the fixing member, and the axial ends of the drive source, the axial ends of the fixing member, and the axial ends of the linear guide are arranged in the first direction.

[0017] Thus, since the drive source is fixed to the fixed member, vibrations and noises during drive source operation are suppressed. Furthermore, since the axial ends of the drive source, fixed member, and linear guide are arranged in the first direction, the axial movement distance of the sliding device is greater than that in Patent Document 1.

[0018] As a desired technical solution for the workbench device, in a cross-section orthogonal to the axis of the external threaded member, the axis of the external threaded member is arranged in a region surrounded by the first surface, the third surface, the first straight line, and the second straight line. The first straight line passes through the first end of the first wall portion farthest from the intersection where the first wall portion intersects with the second wall portion and extends along the third surface. The second straight line passes through the second end of the second wall portion farthest from the intersection portion and extends along the first surface. Thus, the external threaded member and the internal threaded member are arranged close to the fixed member, thereby further miniaturizing the overall workbench device.

[0019] As a desired technical solution for the worktable device, the worktable device further includes a mounting member that extends intersecting the said axial direction and provides the fixing member. When viewed from the said axial direction, the ball screw, the sliding device, and the fixing member are arranged in an area surrounded by the outer periphery of the mounting member. This further reduces the overall size of the worktable device when viewed from the axial direction.

[0020] The effects of the invention

[0021] According to this disclosure, a worktable device can be provided that further reduces the overall size of the device. Attached Figure Description

[0022] Figure 1 This is a front view showing an example of a workbench device according to an embodiment.

[0023] Figure 2 This is a side view illustrating an example of the workbench device in the embodiment.

[0024] Figure 3 This is a side view illustrating an example of the workbench device in the embodiment.

[0025] Figure 4 yes Figure 1 A cross-sectional view at line IV-IV.

[0026] Figure 5 It is a three-dimensional view showing a portion of the ball nut and screw. Detailed Implementation

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto. The elements of each embodiment described below can be appropriately combined. Furthermore, there are cases where some constituent elements are not used. In the following description, an XYZ orthogonal coordinate system is established, and the positional relationships of each part will be described with reference to this XYZ orthogonal coordinate system. In this embodiment, the XY plane is parallel to the horizontal plane. The Z direction is the vertical direction. However, the X, Y, and Z directions are merely examples, and the present invention is not limited to these directions.

[0028] Figure 1 This is a front view showing an example of a workbench device according to an embodiment. Figure 2 This is a side view illustrating an example of the workbench device in the embodiment. Figure 3 This is a side view illustrating an example of the workbench device in the embodiment. Figure 4 yes Figure 1 A cross-sectional view at line IV-IV. Figure 5 It is a three-dimensional view showing a portion of the ball nut and screw.

[0029] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the worktable device 1 includes a ball screw 60, a sliding device 30, a fixed component 2, a motor M (drive source), and a setting component 80.

[0030] The ball screw 60 includes a screw 7 (external thread component) and a nut bracket 6 (internal thread component).

[0031] like Figure 1 and Figure 3 As shown, the screw 7 (externally threaded member) extends from the motor M in the -Z direction (axial direction). An external thread is provided on the outer circumferential surface of the screw 7. One axial end of the screw 7 (the end in the +Z direction) is fixed to the fixed member 2 by means of a first support member 81 (support member). The other axial end of the screw 7 (the end in the -Z direction) is fixed to the mounting portion (not shown) of the fixed member 2 by means of a second support member 82 (support member). The first support member 81 and the second support member 82 support the screw 7 in a rotatable state to the fixed member 2.

[0032] The nut bracket 6 (internal thread component) has a ball nut 67 and a bracket body 66. For example... Figure 5 As shown, the ball nut 67 has a cylindrical portion 61 and a flange portion 62. An internal thread that engages with the external thread of the screw 7 is provided on the inner circumference of the cylindrical portion 61. The flange portion 62 extends radially from the axial end of the cylindrical portion 61 along the screw 7. The flange portion 62 has an arcuate portion 621 and a chamfered portion 622. The arcuate portion 621 has an arcuate outer periphery centered on the axis AX, and the chamfered portion 622 has an outer periphery formed by cutting off the outer periphery end of the arcuate portion 621. A pair of arcuate portions 621 are provided across the axis AX. A pair of chamfered portions 622 are provided across the axis AX. The arcuate portions 621 and chamfered portions 622 are arranged alternately along the circumferential direction. A plurality of through holes 623 extending along the thickness direction (axial direction) are provided on the flange portion 62 along the circumferential direction.

[0033] like Figure 4As shown, the bracket body 66 has a first protrusion 64 that protrudes in the +X direction when viewed from the +Z direction (axial direction) and a second protrusion 65 that protrudes in the -Y direction. That is, when viewed axially, the bracket body 66 has an L-shaped form composed of the first protrusion 64 and the second protrusion 65. A bolt is inserted into the through hole 623 of the flange portion 62 of the ball nut 67, and the flange portion 62 is fastened to the bracket body 66 by means of the bolt. The cylindrical portion 61 has an internal thread that engages with the external thread of the screw 7, so that the ball nut 67 can move axially by rotating the screw 7.

[0034] The sliding device 30 has a plate-shaped member 4, a linear guide 3, and a sliding member 5.

[0035] Plate-like member 4 extends along the YZ plane. More specifically, as... Figure 2 As shown, plate member 4 is a rectangular plate extending along the +Z direction. Figure 4 As shown, the end of the plate-shaped member 4 in the +Y direction is fixed to the front end of the first protrusion 64. In a section orthogonal to the axis AX, the plate-shaped member 4 has an inner surface 41 in the -X direction and an outer surface 42 in the +X direction. A first sliding member 51 and a second sliding member 52 are fixed to the inner surface 41. For example, a workpiece is mounted on the outer surface 42.

[0036] like Figure 1 , Figure 3 as well as Figure 4 As shown, a first sliding member 51 and a second sliding member 52 are fixed to the end of the plate-shaped member 4 in the +Z direction. A third sliding member 53 and a fourth sliding member are fixed to the end of the plate-shaped member 4 in the -Z direction. Figure 2 As shown, the linear guide 3 has a first linear guide 31 and a second linear guide 32 extending along the +Z direction. The first linear guide 31 and the second linear guide 32 are separately configured and extend parallel to each other. The first linear guide 31 extends from an end 311 in the +Z direction to an end 312 in the -Z direction. The second linear guide 32 extends from an end 321 in the +Z direction to an end 323 in the -Z direction. The first linear guide 31 is located on the +Y direction side compared to the second linear guide 32.

[0037] like Figure 4As shown, the slider 5 has a roughly U-shaped shape in a cross-section orthogonal to the axis AX. In other words, the slider 5 has a roughly U-shaped shape that opens towards the -X direction. The first linear guide 31 and the second linear guide 32 both have a rectangular shape in a cross-section orthogonal to the axis AX. The first linear guide 31 is inserted into the opening of the first slider 51. Thus, the first slider 51 is slidably supported on the first linear guide 31. The second linear guide 32 is inserted into the opening of the second slider 52. Thus, the second slider 52 is slidably supported on the second linear guide 32.

[0038] like Figure 1 , Figure 2 as well as Figure 3 As shown, the fixing member 2 extends axially from the end in the +Z direction, i.e., the first end 23, to the end in the -Z direction, i.e., the second end 24. Figure 4 As shown, the fixing member 2 has a first wall portion 21 extending in the +X direction (first direction) on a section orthogonal to the axis AX, and a second wall portion 22 extending in the +Y direction (a second direction intersecting the first direction). Additionally, stoppers 85 and 86 are provided on the fixing member 2 to restrict the movement of the nut bracket 6.

[0039] In detail, such as Figure 4 As shown, an intersection 200 is provided where a first wall portion 21 and a second wall portion 22 intersect. The first wall portion 21 extends from its end 213 in the -X direction toward the intersection 200 in the +X direction. The second wall portion 22 extends from its end 213 in the -Y direction to its end 223 in the +Y direction. In a cross section orthogonal to the axis AX, the first wall portion 21 and the second wall portion 22 have an L-shaped form. The surface of the first wall portion 21 in the +Y direction is the first surface 211, and the surface of the first wall portion 21 in the -Y direction is the second surface 212. The second surface 212 is located on the opposite side of the first surface 211.

[0040] The first end 213 is the part of the first wall portion 21 furthest from the intersection 200. The surface of the second wall portion 22 on the -X direction side is the third surface 222, and the surface of the second wall portion 22 on the +X direction side is the fourth surface 221. The fourth surface 221 is located on the opposite side of the third surface 222. The second end 223 is the part of the second wall portion 22 furthest from the intersection 200. Although not shown, a mounting portion for fixing the first support member 81 and the second support member 82 is provided on the first surface 211. The first linear guide 31 and the second linear guide 32 are fixed on the fourth surface 221.

[0041] like Figure 4As shown, the semi-straight line L0 extends from the intersection along a third direction that intersects the first and second directions. The intersection angle between the semi-straight line L0 and the first surface 211 is approximately 45°. The intersection angle between the semi-straight line L0 and the third surface 222 is also approximately 45°. However, the intersection angles between the semi-straight line L0 and the first surface 211, and between the semi-straight line L0 and the third surface 222, are not limited to 45°. The first surface 211 and the third surface 222 are arranged opposite each other across the semi-straight line L0.

[0042] like Figure 1 , Figure 2 as well as Figure 3 As shown, the motor M (drive source) is fixed near the first end 23 of the fixing member 2 by means of belt 87. The drive shaft of the motor M is connected to the screw 7 by means of coupling 83. Therefore, the screw 7 and the drive shaft of the motor M rotate in tandem about the axis AX. Figure 4 As shown, the first straight line L1, represented by a dashed line, passes through the first end 213 and extends along the third surface 222. The second straight line L2, represented by a dashed line, passes through the second end 223 and extends along the first surface 211. The axis AX of the screw 7 lies inside the rectangular area enclosed by the first straight line L1, the second straight line L2, the third surface 222, and the first surface 211.

[0043] like Figure 2 As shown, one end 311 (axial end) of the first linear guide 31, one end 321 (axial end) of the second linear guide 32, the +Z direction end Ma (axial end) of the motor M, and the first end 23 of the fixing member 2 are arranged in the +X direction.

[0044] like Figure 1 , Figure 2 as well as Figure 3 As shown, component 80 is fixed to the second end 24 of fixed component 2 and extends along the XY plane. Component 80 is fixed to the ground 90. Figure 4 As shown, the mounting member 80 is a plate-shaped member with a rectangular shape. When viewed from the axial direction, the ball screw 60, the sliding device 30, and the fixing member 2 are arranged in a rectangular region 88 surrounded by the outer periphery 80a of the mounting member 80.

[0045] Next, the process of the sliding device 30 moving will be briefly explained.

[0046] First, when driven by motor M, screw 7 rotates around axis AX in conjunction with the rotation of the drive shaft of motor M. Due to the rotation of screw 7, nut bracket 6 (internal thread member) with ball nut 67 moves axially. Since the bracket body 66 of nut bracket 6 is fixed to plate member 4, plate member 4 and sliding member 5 move in the +Z and -Z directions (axially). Because the workpiece is mounted on plate member 4, it is possible to process the workpiece, which moves integrally with plate member 4. Here, as... Figure 1 As shown by the two dashed lines, the plate-shaped member 4 and the sliding member 5 can move in the +Z direction within the range between the first position P1 closest to the +Z direction and the second position P2 closest to the -Z direction.

[0047] In addition, such as Figure 1 As shown, the axial center position of the plate member 4 is designated as position 3 P3, and the axial center position of the nut bracket 6 is designated as position 4 P4. Position 4 P4 is positioned on the -Z direction side (i.e., the side away from the motor M) compared to position 3 P3.

[0048] As described above, the workbench device 1 of this embodiment includes a ball screw 60, a sliding device 30, and a fixing member 2 for fixing the sliding device 30. The fixing member 2 has a first wall portion 21 extending along a first direction (+X direction) in a cross section including the axis AX of the screw 7 (external thread member), and a second wall portion 22 extending along a second direction (+Y direction) intersecting the first direction. In this embodiment, the first direction and the second direction are orthogonal, but they only need to intersect.

[0049] Thus, the fixing member 2 has a first wall portion 21 extending along a first direction (+X direction) and a second wall portion 22 extending along a second direction (+Y direction). Here, the sliding device of Patent Document 1 has a guide rail that is approximately U-shaped in a cross-section orthogonal to the ball screw, thus potentially leading to a larger overall device size. However, the fixing member 2 of this embodiment is L-shaped with the first wall portion 21 and the second wall portion 22, therefore, compared to the sliding device of Patent Document 1, the overall device is smaller and lighter. Furthermore, as... Figure 4 As shown, since the nut bracket 6 is open on the -X direction side, the workability of maintaining the nut bracket 6 is improved.

[0050] The first surface 211 of the first wall portion 21 has a mounting portion for fixing the first support member 81 and the second support member 82 (support member) that support the screw 7 (external thread member) so that it can rotate, and a sliding device 30 is provided on the fourth surface 221 of the second wall portion 22.

[0051] Thus, a support member for the screw 7 is fixed on the first surface 211 of the first wall portion 21, and a sliding device 30 is provided on the fourth surface 221 of the second wall portion 22. Therefore, by dispersively fixing the constituent parts of the worktable device 1 to the first wall portion 21 and the second wall portion 22, the overall device is miniaturized.

[0052] The sliding device 30 has a plate-shaped member 4 for fixing the nut bracket 6 (internal thread member), a linear guide 3 fixed to the fourth surface 221, and a sliding member 5 supported on the linear guide 3 in a slidable manner. The fixed position of the nut bracket 6 on the plate-shaped member 4 (fourth position P4) is a position farther away from the motor M compared to the axial center of the plate-shaped member 4 (third position P3).

[0053] Therefore, when the nut bracket 6 moves towards the motor M, interference between the motor M and the nut bracket 6 is suppressed. Thus, compared to Patent Document 1, the position of the end of the plate member 4 on the motor M side during movement is positioned closer to the motor M in this embodiment. Consequently, the axial sliding range of the plate member 4 in this embodiment is larger.

[0054] Motor M is fixed to fixing member 2. The axial end Ma of motor M, the first end 23 (axial end) of fixing member 2, one end 311 of first linear guide 31 and one end 321 (axial end of linear guide 3) of second linear guide 32 are arranged in the first direction.

[0055] Thus, since the motor M is fixed to the fixing member 2, vibrations and operating noises during motor M operation are suppressed. Furthermore, since the axial ends of the motor M, the fixing member 2, and the linear guide 3 are arranged in the first direction, the axial movement range of the sliding device 30 is larger compared to Patent Document 1.

[0056] In a cross-section containing the axis AX of the screw 7 (external threaded member), the axis AX of the screw 7 is positioned in the area surrounded by the first surface 211, the third surface 222, the first straight line L1 passing through the first end 213 and extending along the third surface 222, and the second straight line L2 passing through the second end 223 and extending along the first surface 211. Thus, the screw 7 and the nut bracket 6 are positioned close to the fixing member 2, thereby further miniaturizing the overall worktable assembly 1. Furthermore, the first wall portion 21 and the second wall portion 22 of the fixing member 2 suppress the scattering of lubricating grease applied to the outer peripheral surface of the screw 7.

[0057] Furthermore, the setting member 80, which includes the fixing member 2, has the ball screw 60, sliding device 30, and fixing member 2 arranged in a region 88 surrounded by the outer periphery 80a of the setting member 80 when viewed from the axial direction. As a result, the overall size of the worktable device 1 when viewed from the axial direction is further reduced.

[0058] The above describes the implementation methods, but the implementation methods are not limited to the above description. For example, the workbench device 1 in the embodiment is provided in a posture extending along the +Z direction, but it may also be provided on the ground 90 in a posture extending along the +X or +Y direction. In addition, it may be arranged in a way that is hung on the wall of the structure.

[0059] Explanation of reference numerals in the attached figures

[0060] 1. Workbench assembly; 2. Fixed component; 3. Linear guide; 4. Plate-shaped component; 5. Sliding component; 6. Nut bracket (internal thread component); 7. Screw (external thread component); 21. First wall portion; 22. Second wall portion; 30. Sliding device; 60. Ball screw; 80. Setting component; 81. First support component (support component); 82. Second support component (support component); 88. Area; 211. First surface; 212. Second surface; 222. Third surface; 221. Fourth surface; 213. First end; 223. Second end; AX, axis; L1, first straight line; L2, second straight line; M, motor (drive source).

Claims

1. A worktable device, wherein, This workbench device has the following features: A ball screw includes an external threaded member extending axially and an internal threaded member engaging with the external threaded member and capable of moving axially by rotation of the external threaded member; A sliding device that supports the internally threaded member to enable movement; and A fixed component, on which the sliding device is provided. The fixing member has a first wall portion extending along a first direction in a cross section orthogonal to the axis of the external threaded member, and a second wall portion extending from one end of the first wall portion in the first direction toward a second direction intersecting the first direction. The fixing member is formed by the first wall portion and the second wall portion in an L-shaped cross section. The first wall portion has a first surface and a second surface located on the opposite side of the first surface. The second wall portion has a third surface and a fourth surface located on the opposite side of the third surface. On a cross section orthogonal to the axis of the external threaded member, the first surface and the third surface are arranged opposite each other along a semi-straight line extending in a third direction that intersects the first direction and the second direction, with the intersection of the first wall portion and the second wall portion as the starting point. A support member is provided on the first surface side to support the external threaded member so that it can rotate. The sliding device is provided on the fourth side. The sliding device includes: a plate-like member extending along the axial direction and fixing the internally threaded member; a linear guide extending along the axial direction and fixed to the fourth surface; and a sliding member fixed to the plate-like member and slidably supported on the linear guide. The linear guide has a first linear guide fixed to one end of the fourth surface in the second direction and a second linear guide fixed to the other end of the fourth surface in the second direction. The slider has a first slider that is slidably supported on the first linear guide and a second slider that is slidably supported on the second linear guide. When viewed from the first direction, the first linear guide overlaps with the external threaded member, and the second linear guide overlaps with the first wall portion.

2. The workbench device according to claim 1, wherein, The workbench device also includes a mounting component that is fixed to the ground, the mounting component extending upward along the axial direction in the vertical direction. The lower end of the fixing member is fixed to the setting member. On a cross section orthogonal to the axis of the external threaded component, The end of the first wall portion on the other side of the first direction is located on the other side of the first direction relative to the end of the internal thread member on the other side of the first direction. The first length of the first wall portion along the first direction is longer than the second length of the second wall portion along the second direction.

3. The workbench device according to claim 2, wherein, The worktable device also has a drive source for rotating the external threaded component. The fixed position of the internal threaded member on the plate-shaped member is a position farther away from the drive source compared to the center of the axial direction of the plate-shaped member.

4. The worktable device according to claim 3, wherein, The drive source is fixed to the fixed component. The axial ends of the drive source, the axial ends of the fixing member, and the axial ends of the linear guide are arranged in the first direction.

5. The worktable apparatus according to any one of claims 2 to 4, wherein, In a cross-section orthogonal to the axis of the external threaded member, the axis of the external threaded member is disposed in the region surrounded by the first surface, the third surface, the first straight line, and the second straight line. The first straight line passes through the first end of the first wall portion that is furthest from the intersection of the first wall portion and the second wall portion, and extends along the third surface. The second straight line passes through the second end of the second wall that is furthest from the intersection and extends along the first surface.

6. The worktable apparatus according to any one of claims 2 to 4, wherein, When viewed from the axial direction, the ball screw, the sliding device, and the fixing member are arranged in an area surrounded by the outer periphery of the setting member.

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