Swing table

Abstract

The swing table is provided with a base part; a linear motion mechanism including a guide rail attached to the base portion and a slider attached to the guide rail so as to be capable of moving relative to the guide rail; a driving source for linearly reciprocating the slider; a first support part which is installed on the slide block and performs linear reciprocating motion together with the slide block; the first rolling bearing is mounted on the first supporting part; a stage part to which power from the drive source is transmitted so as to be able to oscillate; a second support part for supporting the table part; the second rolling bearing is mounted on the second supporting part; and an eccentric shaft including a first shaft portion supported by the first rolling bearing and a second shaft portion disposed at an eccentric position with respect to the first shaft portion, the second shaft portion being supported by the second rolling bearing.

Description

Technical Field

[0001] The present disclosure relates to a swing table. This application claims priority based on Japanese application No. 2022-174481 filed on October 31, 2022, and all the contents described in the Japanese application are cited. Background Art

[0002] A sliding device consisting of a base and a sliding body is known (for example, see Patent Document 1). According to the sliding device disclosed in Patent Document 1, a meshing body such as a worm or a pinion is used as a driving method. In addition, rack teeth meshing with the meshing body are formed on the first sliding member side fixed to the base or on the second sliding member side fixed to the sliding body.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2001-99254. Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In the swing table (for example, the goniometer table), the conventional worm gear drive method has the following problems. That is, the worm gear drive method uses a so-called sliding mechanism during driving, so it is difficult to calculate the life span of the device. In addition, since the device has a gap structure, a backlash will occur, and it is extremely difficult to accurately position the table. In addition, there are limitations in operating at high speeds.

[0008] Therefore, one of the objects of the present invention is to provide a swing table whose service life can be easily calculated, and which can accurately position the table portion and appropriately operate at a high speed.

[0009] Means used to solve problems

[0010] The swing table disclosed in the present invention comprises: a base portion; a direct-acting mechanism, including a guide rail mounted on the base portion and a slider mounted on the guide rail so as to be relatively movably; a driving source, which causes the slider to perform linear reciprocating motion; a first supporting portion, which is mounted on the slider and performs linear reciprocating motion together with the slider; a first rolling bearing, which is mounted on the first supporting portion; a table portion, which is capable of swinging motion by receiving power from the driving source; a second supporting portion, which supports the table portion; a second rolling bearing, which is mounted on the second supporting portion; and an eccentric shaft, including a first shaft portion and a second shaft portion arranged at an eccentric position relative to the first shaft portion, the first shaft portion being supported by the first rolling bearing, and the second shaft portion being supported by the second rolling bearing.

[0011] Effects of the Invention

[0012] According to the above-mentioned swing table, the service life period can be easily calculated, the table portion can be accurately positioned, and high-speed operation can be appropriately performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic perspective view showing the swing table in Embodiment 1 of the present disclosure.

[0014] Figure 2 yes Figure 1 A schematic top view of the swing table is shown.

[0015] Figure 3 yes Figure 1 A schematic side view of the swing table is shown.

[0016] Figure 4 yes Figure 1 A schematic front view of the swing table is shown.

[0017] Figure 5 It is a schematic perspective view of the swing table in the first embodiment, showing a state in which a table portion described later is removed and some components are indicated by dotted lines.

[0018] Figure 6 yes Figure 5 A schematic top view of the swing table is shown.

[0019] Figure 7 yes Figure 5 A schematic side view of the swing table is shown.

[0020] Figure 8 yes Figure 5 A schematic front view of the swing table is shown.

[0021] Fig. 9 The base portion described later is included and cut along the YZ plane. Figure 5 A schematic cross-sectional view of the swing table shown.

[0022] Fig.10 yes Fig. 9 A schematic top view of the swing table is shown.

[0023] Fig.11 yes Fig. 9 A schematic side view of the swing table is shown.

[0024] Fig.12 yes Fig. 9 A schematic front view of the swing table is shown.

[0025] Fig.13 yes Fig.10 An enlarged view of region XIII is shown.

[0026] Fig.14 yes Fig.13A schematic side view of the swing table is shown.

[0027] Fig.15 It is a schematic side view of the swing table showing a state in which a table portion described later is tilted by swinging.

[0028] Fig.16 It is a schematic side view showing the swing table before tilting, that is, in a state where a table portion described later is horizontal. DETAILED DESCRIPTION

[0029] [Overview of Embodiments]

[0030] The swing table disclosed in the present invention comprises: a base portion; a direct-acting mechanism, including a guide rail mounted on the base portion and a slider mounted on the guide rail so as to be relatively movably; a driving source, which causes the slider to perform linear reciprocating motion; a first supporting portion, which is mounted on the slider and performs linear reciprocating motion together with the slider; a first rolling bearing, which is mounted on the first supporting portion; a table portion, which is capable of swinging motion by receiving power from the driving source; a second supporting portion, which supports the table portion; a second rolling bearing, which is mounted on the second supporting portion; and an eccentric shaft, including a first shaft portion and a second shaft portion arranged at an eccentric position relative to the first shaft portion, the first shaft portion being supported by the first rolling bearing, and the second shaft portion being supported by the second rolling bearing.

[0031] According to the swing table disclosed in the present invention, the slider included in the direct-acting mechanism performs linear reciprocating motion by the power from the driving source. The first support portion installed on the slider performs linear reciprocating motion together with the slider. Then, the table portion installed on the second support portion via the eccentric shaft performs swinging motion along with the linear reciprocating motion of the first support portion. Among them, the first shaft portion of the eccentric shaft is supported by the first rolling bearing, and the second shaft portion of the eccentric shaft is supported by the second rolling bearing. This structure is different from the sliding mechanism, and it is easy to calculate the service life based on the fatigue of the rolling body. In addition, since it is a structure using the first rolling bearing and the second rolling bearing, unlike the drive method using the worm gear, no gap will be generated, so the table portion can be accurately positioned and is suitable for high-speed operation. Therefore, according to such a swing table, the service life calculation is easy, and the table portion can be accurately positioned, and high-speed operation can be appropriately performed. Among them, the accurate positioning of the table portion refers to the ability to accurately determine the inclination angle of the table portion that is tilted by the swinging motion.

[0032] In the above-mentioned swing table, the direct-acting mechanism may include a direct-acting guide unit. Thereby, the table portion can be smoothly swung and positioning can be performed more accurately.

[0033] In the above-mentioned swing table, at least one of the first rolling bearing and the second rolling bearing may include an angular contact bearing. Thereby, the eccentric shaft can be properly supported, the table portion can be smoothly swung, and the service life can be accurately calculated.

[0034] In the above-mentioned swing table, the driving source may also include: a ball screw having a screw shaft and a ball screw nut mounted on the first support portion; and a motor to rotate the screw shaft. Thus, the rotational motion of the motor can be converted into the linear motion of the slider, so that the table can swing more smoothly, and the rotation of the motor can be controlled to implement high-speed operation and accurate positioning.

[0035] In the above swing table, when the table is horizontal when viewed in the horizontal direction, the extension direction of the imaginary line segment connecting the center of the first shaft portion and the center of the second shaft portion can be horizontal. Thus, the stability of the swing table can be ensured when the table is horizontal.

[0036] In the above-mentioned swing table, a plurality of sliders may be provided. Thus, the linear reciprocating motion of the first support portion can be accurately performed by the plurality of sliders, and more accurate positioning and high-speed operation can be implemented.

[0037] In the above-mentioned swing table, the table portion may include a sliding portion having a sliding surface formed of a curved surface. The base portion may also include a guiding portion having a guiding surface formed of a curved surface and in contact with the sliding surface, and the guiding portion guides the table portion. Thus, the swinging motion of the table portion can be made smoother by the sliding portion having the sliding surface and the guiding portion having the guiding surface.

[0038] In the above-mentioned swing table, a pair of guide parts may be provided so as to sandwich the guide rail. Thereby, the swinging table part can be guided more appropriately.

[0039] [Specific example of embodiment]

[0040] Next, an example of a specific embodiment of the swing table of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and their description will not be repeated.

[0041] (Implementation Method 1)

[0042] First, Embodiment 1 which is an embodiment of the present disclosure will be described. Figure 1 1 is a schematic perspective view showing a swing table in Embodiment 1 of the present disclosure. Figure 1 In the following figures, the Y direction is the extension direction of the guide rail described later, indicating the long side direction of the swing table, the X direction indicates the short side direction of the swing table, and the Z direction indicates the thickness direction (height direction) of the swing table. The X direction, the Y direction, and the Z direction are orthogonal to each other. Figure 2 yes Figure 1 A schematic top view of the swing table is shown. Figure 2 Observe along the direction indicated by arrow II Figure 1 Figure of the swing table shown. Figure 3 yes Figure 1 A schematic side view of the swing table is shown. Figure 3 Observe along the direction indicated by arrow III Figure 1 Figure of the swing table shown. Figure 4 yes Figure 1 A schematic front view of the swing table is shown. Figure 4 Observe along the direction indicated by arrow IV Figure 1 Figure of the swing table shown.

[0043] Figure 5 It is a schematic perspective view of the swing table in the first embodiment, showing a state in which a table portion described later is removed and some components are indicated by dotted lines. Figure 6 yes Figure 5 A schematic top view of the swing table is shown. Figure 6 Observe along the direction indicated by arrow VI Figure 5 Figure of the swing table shown. Figure 7 yes Figure 5 A schematic side view of the swing table is shown. Figure 7 Observe along the direction indicated by arrow VII Figure 5 Figure of the swing table shown. Figure 8 yes Figure 5 A schematic front view of the swing table is shown. Figure 8 Observe along the direction indicated by arrow VIII Figure 5 Figure of the swing table shown.

[0044] Fig. 9 The base portion described later is included and cut along the YZ plane. Figure 5 A schematic cross-sectional view of the swing table shown. Fig.10 yes Fig. 9 A schematic top view of the swing table is shown. Fig.10 Observe along the direction indicated by arrow X Fig. 9 Figure of the swing table shown. Fig.11 yes Fig. 9 A schematic side view of the swing table is shown. Fig.11 Observe along the direction indicated by arrow XI Fig. 9 Figure of the swing table shown. Fig.12 yes Fig. 9 A schematic front view of the swing table is shown. Fig.12 Observe along the direction indicated by arrow XII Fig. 9 Figure of the swing table shown. Fig.13 yes Fig.10 An enlarged view of region XIII is shown. Fig.14 yes Fig.13 A schematic side view of the swing table is shown. Fig.15 It is a schematic side view of the swing table showing a state in which a table portion described later is tilted by swinging. Fig.16 It is a schematic side view showing the swing table before tilting, that is, in a state where a table portion described later is horizontal.

[0045] Reference Figures 1 to 16 The swing table 10 of the embodiment 1 of the present disclosure includes a base portion 11, a direct-acting mechanism 12, a driving source 13, a first support portion 14, a first rolling bearing 15, a table portion 16, a second support portion 18, a second rolling bearing 19, and an eccentric shaft 20. In the present embodiment, both the first rolling bearing 15 and the second rolling bearing 19 are angular contact bearings. Next, the structure of each component is described.

[0046] The base 11 is rectangular when viewed in the thickness direction, that is, in the Z direction. The base 11 is a portion that serves as the base of the swing table 10, and various components are directly or indirectly mounted thereon. The base 11 includes a plate-like base plate 34 and a pair of guides 17a and 17b.

[0047] A pair of guide portions 17a and 17b are integrally formed with the base plate 34. The guide portions 17a and 17b are arranged at intervals in the X direction in a manner of sandwiching the guide rail 21 described later. The guide portions 17a and 17b are arranged in a manner of standing upright from the base plate 34. The guide portion 17a has a guide surface 29a which is composed of a curved surface and contacts the sliding surface 38a described later. The guide portion 17b has a guide surface 29b which is composed of a curved surface and contacts the sliding surface 38b described later. The guide surface 29a and the guide surface 29b are respectively arranged at the ends of the guide portion 17a and the guide portion 17b in the Z direction. The guide surface 29a and the guide surface 29b are respectively arc-shaped when viewed in the X direction. The curvature of the guide surface 29a and the guide surface 29b is the same. The guide surface 29a and the guide surface 29b guide the table 16 when the table 16 swings.

[0048] In the present embodiment, the direct-acting mechanism 12 is a direct-acting guide unit. The direct-acting mechanism 12 includes a guide rail 21 and a plurality of sliders, in the present embodiment, two sliders 22a and a slider 22b. The guide rail 21 is installed in a manner such that the long side direction is placed on the base portion 11, specifically, on the central area of ​​the base plate 34 in the X direction. The guide rail 21 is installed and fixed to the base plate 34 by a plurality of bolts. On the guide rail 21, the guide rail track surface for rolling the rolling element is set in a manner concave along the long side direction.

[0049] The slider 22a and the slider 22b are respectively mounted on the guide rail 21. On the sliders 22a and 22b, the slider track surfaces for rolling the rolling bodies are respectively arranged in a recessed manner along the long side direction. A plurality of rolling bodies, such as balls, are arranged between the slider track surface of the slider 22a and the guide track surface. Similarly, a plurality of rolling bodies, such as balls, are arranged between the slider track surface of the slider 22b and the guide track surface. The direct-acting mechanism 12 as a direct-acting guide unit enables the sliders 22a and 22b to smoothly perform linear reciprocating motion in the long side direction of the guide rail 21.

[0050] The driving source 13 causes the slider 22a and the slider 22b to perform linear reciprocating motion. In the present embodiment, the driving source 13 includes a ball screw 23 and a motor 24. The ball screw 23 includes a ball screw nut 25 and a screw shaft 26. The screw shaft 26 is arranged in a manner that the long side direction extends along the Y direction. A thread groove is provided on the outer diameter surface of the screw shaft 26. The screw shaft 26 is rotated by the motor 24. The ball screw nut 25 is mounted on the screw shaft 26, and a rolling element (ball) is arranged between the thread groove and the track surface provided on the ball screw nut 25. Through the rotation of the screw shaft 26, the ball screw nut 25 performs linear reciprocating motion in the long side direction of the screw shaft 26, i.e., in the Y direction.

[0051] The first support portion 14 is block-shaped and mounted on the ball screw nut 25. In addition, the first support portion 14 is mounted in a manner of being placed on the slider 22a and the slider 22b. That is, the ball screw nut 25, the first support portion 14, the slider 22a and the slider 22b are configured to be mounted separately and move as a whole. Through the rotation of the screw shaft 26, the ball screw nut 25, the first support portion 14 mounted on the ball screw nut 25, the slider 22a and the slider 22b mounted on the first support portion 14 are linked to perform linear reciprocating motion in the Y direction. A through hole that penetrates in the X direction is provided in the first support portion 14, and the first rolling bearing 15 is installed in the through hole. In the present embodiment, the outer ring of the first rolling bearing 15 is installed in a manner of being embedded in the through hole provided in the first support portion 14.

[0052] The table 16 is plate-shaped and is installed in a manner covering the base 11 in the Z direction. The table 16 is capable of swinging by transmitting power from a driving source. The table 16 includes a mounting portion 27 having a plane 37 that can be parallel to the XY plane. The plane 37 of the mounting portion 27 is a surface exposed in the Z direction. The surface of the mounting portion 27 that is located on the opposite side of the plane 37 in the thickness direction is opposite to the base 11. Through the swinging movement of the table 16, the plane 37 of the mounting portion 27 is inclined relative to the horizontal direction. Flange portions 35a and flange portions 35b protruding toward the base plate 34 are provided at both ends of the mounting portion 27 in the X direction. The end surfaces of the flange portions 35a and the flange portions 35b in the Z direction are composed of curved surfaces. When viewed along the X direction, the end surfaces of the flange portion 35a in the Z direction and the end surfaces of the flange portion 35b in the Z direction are respectively arc-shaped.

[0053] The table 16 includes a sliding portion 28a having a sliding surface 38a formed of a curved surface. The table 16 includes a sliding portion 28b having a sliding surface 38b formed of a curved surface. The sliding portion 28a and the sliding portion 28b are respectively mounted on the surface of the mounting portion 27 opposite to the base plate 34 by bolts. In the present embodiment, the sliding portion 28a and the sliding portion 28b are respectively mounted on the mounting portion 27 in a freely detachable manner. The sliding portion 28a is configured in a manner in contact with the flange portion 35a. The sliding portion 28b is configured in a manner in contact with the flange portion 35b. When viewed along the X direction, the sliding surface 38a and the sliding surface 38b are respectively arc-shaped. The curvature of the sliding surface 38a and the sliding surface 38b is the same.

[0054] The second support portion 18 is mounted on the table portion 16 and supports the table portion 16. The second support portion 18 is mounted on the surface of the mounting portion 27 of the table portion 16 that is opposite to the base plate 34. The second support portion 18 is also block-shaped. Specifically, the second support portion 18 has a tapered portion whose width in the Y direction becomes narrower as it approaches the base portion 11 when viewed in the X direction. A through hole that penetrates in the X direction is provided in the second support portion 18, and a second rolling bearing 19 is installed in the through hole. In the present embodiment, the outer ring of the second rolling bearing 19 is installed in a manner of being embedded in the through hole provided in the second support portion 18.

[0055] The eccentric shaft 20 is installed in such a manner that the axial direction is in the X direction. The eccentric shaft 20 includes a first shaft portion 31, a second shaft portion 32, and a connecting portion 33. The connecting portion 33 is plate-shaped and is provided to connect the first shaft portion 31 and the second shaft portion 32. The second shaft portion 32 is arranged at an eccentric position relative to the first shaft portion 31. Specifically, the end portion in the X direction of the first shaft portion and the end portion in the X direction of the second shaft portion 32 are connected in a state in which the centers of the respective shaft portions are offset, that is, in an eccentric state. The eccentric shaft 20 rotates with the center 36b of the second shaft portion 32 as the rotation center. In this case, the second shaft portion 32 performs a rotational motion. Since the second shaft portion 32 is arranged at an eccentric position relative to the first shaft portion 31, the first shaft portion 31 performs a revolving motion with the center 36b of the second shaft portion 32 as the rotation center. In addition, in Fig.15 and Fig.16 The center 36 a of the first shaft portion 31 and the center 36 b of the second shaft portion 32 are shown in FIG.

[0056] The eccentric shaft 20 is supported by a first rolling bearing 15 and a second rolling bearing 19. Specifically, the first shaft portion 31 of the eccentric shaft 20 is supported by the second rolling bearing 15. In addition, the second shaft portion 32 of the eccentric shaft 20 is supported by the second rolling bearing 19. In the present embodiment, the first shaft portion 31 is embedded in the inner side of the inner ring included in the first rolling bearing 15. In addition, the second shaft portion 32 is embedded in the inner side of the inner ring included in the second rolling bearing 19. Among them, it is configured that, when viewed in the horizontal direction, when the table portion 16 is horizontal, specifically, when the plane 37 of the mounting portion 27 is horizontal, the extension direction of the imaginary line segment 39 connecting the center 36a of the first shaft portion 31 and the center 36b of the second shaft portion 32 is horizontal. In addition, in Fig.15 as well as Fig.16 In FIG. 1 , a virtual line segment 39 is shown by a dashed line. When the table 16 swings and the plane 37 tilts, the virtual line segment 39 also tilts.

[0057] Next, the operation of the swing table 10 will be described. The screw shaft 26 of the ball screw 23 rotates by the transmission of the rotational force from the motor 24. As a result, the ball screw nut 25 mounted on the screw shaft 26 performs linear motion in the Y direction. In conjunction with the linear motion of the ball screw nut 25, the first support portion 14 also performs linear motion. Corresponding to the linear motion of the first support portion 14, the eccentric shaft 20 rotates. Through the rotation of the eccentric shaft 20, the table portion 16 is guided by the guide surface 29a of a pair of guide portions 17a and the guide surface 29b of the guide portion 17b, and swings together with the second support portion 18. Through the swinging of the table portion 16, the plane 37 of the mounting portion 27 is tilted.

[0058] According to the swing table 10 of such a structure, the slider 22a and the slider 22b included in the direct-acting mechanism perform linear reciprocating motion by the power from the driving source 13. The first support portion 14 mounted on the slider 22a and the slider 22b performs linear reciprocating motion together with the slider 22a and the slider 22b. Then, the table portion 16 mounted on the second support portion 18 via the eccentric shaft 20 performs a swinging motion along with the linear reciprocating motion of the first support portion 14. Among them, the first shaft portion 31 of the eccentric shaft 20 is supported by the first rolling bearing 15, and the second shaft portion 32 of the eccentric shaft 20 is supported by the second rolling bearing 19. This structure is different from the sliding mechanism, and it is easy to calculate the service life based on the fatigue of the rolling element. In addition, since it is a structure using the first rolling bearing 15 and the second rolling bearing 19, unlike the drive method using the worm gear, there is no gap, so the table portion 16 can be accurately positioned and can be suitable for high-speed operation. Therefore, according to such a swing table 10, the service life period can be easily calculated, the table portion 16 can be accurately positioned, and high-speed operation can be appropriately performed.

[0059] In the present embodiment, the linear motion mechanism 12 includes a linear motion guide unit, so that the stage 16 can be smoothly swung and more accurately positioned.

[0060] In the present embodiment, both the first rolling bearing and the second rolling bearing are angular contact bearings. Therefore, the eccentric shaft 20 can be appropriately supported, the table 16 can be smoothly swung, and accurate calculation of the service life can be performed.

[0061] In the present embodiment, the driving source 13 includes: a ball screw 23 having a screw shaft 26 and a ball screw nut 25 mounted on the first support portion 14; and a motor 24 that rotates the screw shaft 26. Therefore, the rotational motion of the motor 24 can be converted into the direct motion of the slider 22a and the slider 22b, so that the table 16 can swing more smoothly, and the rotation of the motor 24 can be controlled to implement high-speed operation and accurate positioning.

[0062] In this embodiment, when the table 16 is horizontal when viewed in the horizontal direction, the extension direction of the imaginary line segment 39 connecting the center 36a of the first shaft portion 31 and the center 36b of the second shaft portion 32 is horizontal. Therefore, the stability of the swing table 10 can be ensured when the position of the table 16 is horizontal.

[0063] In this embodiment, a plurality of sliders 22a and sliders 22b are provided, specifically, two sliders 22a and sliders 22b are provided. Therefore, the first support portion 14 can be accurately reciprocated linearly by the plurality of sliders 22a and sliders 22b, and more accurate positioning and high-speed operation can be implemented.

[0064] In the present embodiment, the table 16 includes a sliding portion 28a having a sliding surface 38a formed of a curved surface, and a sliding portion 28b having a sliding surface 38b formed of a curved surface. The base 11 includes a guide portion 17a having a guide surface 29a formed of a curved surface and in contact with the sliding surface 38a, the guide portion 17a guiding the table 16, and a guide portion 17b having a guide surface 29b formed of a curved surface and in contact with the sliding surface 38b, the guide portion 17b guiding the table 16. Therefore, the sliding portion 28a and the sliding portion 28b having the sliding surface 38a and the sliding surface 38b, respectively, and the guide portion 17a and the guide portion 17b having the guide surface 29a and the guide surface 29b, respectively, can make the swinging motion of the table 16 smoother.

[0065] In the present embodiment, a pair of the guide portion 17a and the guide portion 17b is provided so as to sandwich the guide rail 21. Therefore, the swinging table portion 16 can be guided more appropriately.

[0066] (Other embodiments)

[0067] Furthermore, in the above-described embodiment, the guide portion 17 a and the guide portion 17 b are provided as a pair so as to sandwich the guide rail 21 , but the present invention is not limited thereto, and either one may be provided.

[0068] In addition, in the above-mentioned embodiment, a plurality of sliders 22a and sliders 22b are provided, but the present invention is not limited thereto, and a single slider may be provided.

[0069] In addition, in the above embodiment, the drive source 13 includes: a ball screw 23 having a screw shaft 26 and a ball screw nut 25 mounted on the first support portion 14; and a motor 24, which rotates the screw shaft 26, but is not limited to this, and the drive source 13 can also use other mechanisms capable of linear reciprocating motion, such as a linear motor. In addition, in the above embodiment, a direct-acting guide unit is used as a direct-acting mechanism, but is not limited to this, and other direct-acting mechanisms can also be used.

[0070] It should be understood that the embodiments disclosed this time are illustrative in all aspects and are not restrictive in any aspect. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope equivalent to the claims.

[0071] Description of reference numerals:

[0072] 10 swing table, 11 base part, 12 direct-acting mechanism, 13 driving source, 14 first support part, 15 first rolling bearing, 16 table part, 17a, 17b guide part, 18 second support part, 19 second rolling bearing, 20 eccentric shaft, 21 guide rail, 22a, 22b slider, 23 ball screw, 24 motor, 25 ball screw nut, 26 screw shaft, 27 mounting part, 28a, 28b sliding part, 29a, 29b guide surface, 31 first shaft part, 32 second shaft part, 33 connecting part, 34 base plate, 35a, 35b flange part, 36a, 36b center, 37 plane, 38a, 38b sliding surface, 39 imaginary line segment.

Claims

1. A swing table, wherein: have: Base part; A direct-acting mechanism, comprising a guide rail mounted on the base portion and a slider mounted on the guide rail so as to be relatively movable; A driving source causes the slider to perform linear reciprocating motion; A first support portion, mounted on the slider, and performing linear reciprocating motion together with the slider; A first rolling bearing, mounted on the first supporting portion; a table portion capable of swinging motion by receiving power from the driving source; a second supporting portion, supporting the platform portion; A second rolling bearing, mounted on the second supporting portion; and The eccentric shaft includes a first shaft portion and a second shaft portion arranged at an eccentric position relative to the first shaft portion, the first shaft portion is supported by the first rolling bearing, and the second shaft portion is supported by the second rolling bearing.

2. The oscillating table according to claim 1, wherein: The direct-acting mechanism includes a direct-acting guide unit.

3. The oscillating table according to claim 1 or 2, wherein: At least one of the first rolling bearing and the second rolling bearing includes an angular contact bearing.

4. The oscillating table according to claim 1 or 2, wherein: The driving source comprises: A ball screw includes a screw shaft and a ball screw nut mounted on the first support portion; and a motor that rotates the screw shaft.

5. The oscillating table according to claim 1 or 2, wherein: When the table portion is horizontal when viewed in the horizontal direction, an extension direction of an imaginary line segment connecting the center of the first shaft portion and the center of the second shaft portion is horizontal.

6. The oscillating table according to claim 1 or 2, wherein: The sliders are provided in plural numbers.

7. The oscillating table according to claim 1 or 2, wherein: The platform includes a sliding portion having a sliding surface composed of a curved surface, The base portion includes a guide portion having a guide surface that is formed of a curved surface and contacts the sliding surface, and the guide portion guides the stage portion.

8. The oscillating table according to claim 7, wherein: The guide parts are provided in pair so as to sandwich the guide rail.

Images