Pendulum Rotation Direct Drive Stage

Abstract

The present invention discloses a swing-rotation direct-drive platform, which relates to the field of ultra-precision conversion technology, including a base, and also including: a slide, which is slidably arranged on the base; a motion transmission member, which is arranged on the slide, and the motion transmission member has strong rigidity in the moving direction of the slide and weak rigidity in the non-moving direction; a connecting rod, which is arranged on the motion transmission member and is used to control the reciprocating swing of the motion transmission member; a lever plate, which is rotatably arranged on the base through a rotating shaft, and one end of the lever plate is connected to a reciprocating power device and the other end is slidably connected to the connecting rod. The beneficial effects of the present invention are: it can effectively reduce or avoid the movement of the slide in the non-moving direction, that is, the jumping in the direction of the sliding platform, thereby improving the stability of the slide movement, thereby reducing the measurement error and achieving accurate measurement of the measured parts.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-precision conversion, in particular to a pendulum-rotation direct-drive platform. Background Art

[0002] In the field of ultra-precision conversion technology, when testing the size and surface flatness of parts, the parts are usually placed on a slide, and the slide is driven by a power drive device. During the sliding process, the slide drives the parts through a non-contact sensor, thereby detecting the size and surface flatness of the parts perpendicular to the slide. Therefore, in order to achieve accurate measurement, the position of the object being tested should be as stable as possible during the movement. If the position of the slide is unstable during the movement, it jumps up and down, and the straightness or flatness of the motion trajectory is not good, the displacement of the slide in the vertical direction will be transmitted to the sensor through the parts, which will eventually lead to errors in the measured size of the parts and affect the accuracy of the measurement.

[0003] There are usually two main reasons for the above problems. On the one hand, due to the movement gap between the guide rail and the slider, the slider will jump up and down locally when moving along the guide rail; on the other hand, the driving force provided by the power drive device is unstable. For example, in the lead screw mechanism, the motor drives the lead screw to rotate, thereby driving the lead screw to move in a straight line. However, due to the existence of the pitch, there are fluctuations in each circle of the lead screw. From the perspective of precision measurement, in fact, the movement transmitted to the object to be measured is a wave-like movement, not a linear one. Due to the existence of the above two problems, the displacement of the sliding platform in the direction perpendicular to the slide causes the position of the object to be detected to be unstable during the movement, which in turn affects the measurement results of the sensor and causes errors.

[0004] The first problem mentioned above can be greatly reduced through precise processing, but the second technical problem cannot be overcome by precise processing alone. Summary of the invention

[0005] The purpose of the present invention is to facilitate the detection of the size and surface flatness of ultra-precision parts and to overcome the problem of measurement error caused by the up and down fluctuation of the driving force provided by the power drive device. A pendulum rotating direct drive platform is designed.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is a pendulum-rotating direct-drive platform, comprising a base, and also comprising: a slide, slidably arranged on the base; a motion transmission member, arranged on the slide, the motion transmission member has strong rigidity in the moving direction of the slide and weak rigidity in the non-moving direction; a connecting rod, arranged on the motion transmission member, and used to control the reciprocating swing of the motion transmission member; a lever plate, rotatably arranged on the base via a rotating shaft, one end of the lever plate being connected to the reciprocating power device, and the other end being slidably connected to the connecting rod.

[0007] Furthermore, the motion conducting member is a sheet-shaped member, a columnar member or a steel wire.

[0008] Furthermore, the motion conducting member includes a motion conducting member A and a motion conducting member B, the motion conducting member A is fixedly arranged on the slide, the motion conducting member B is fixedly connected to the connecting rod, and the motion conducting member A is fixedly arranged above the motion conducting member B; the motion conducting member A and the motion conducting member B are arranged at a certain angle.

[0009] Furthermore, the reciprocating power device includes: a C-shaped coil magnet, fixedly mounted on the base, the wire on the C-shaped coil magnet being connected to alternating current; a combined magnet, movably mounted in the notch of the C-shaped coil magnet, the combined magnet having the same magnetic properties at both ends opposite to the C-shaped coil magnet, and the combined magnet being formed by connecting two bipolar magnets with the same poles.

[0010] Furthermore, the reciprocating power device is a crank rocker mechanism.

[0011] Furthermore, an arc groove is provided on the lever plate, the center of the arc groove coincides with the axis of the rotating shaft, and the connecting rod is slidably arranged in the sliding groove of the lever plate.

[0012] Furthermore, the length of the line of action of the force from the connection point of the connecting rod and the lever plate to the rotating shaft is L1, and the length of the line of action of the force from the connection point of the lever plate and the reciprocating swing device to the rotating shaft is L2, and L1 is greater than, less than or equal to L2.

[0013] Furthermore, the number of the lever plate is one, one end of the lever plate is slidably connected to the connecting rod, and the other end is connected to the reciprocating power device. Single-stage enlargement, reduction or change of direction.

[0014] Furthermore, the number of the lever plates is N (N>1), and two adjacent lever plates are hingedly connected in sequence through positioning rods. One of the lever plates at both ends is slidably connected to the connecting rod, and the other is connected to the reciprocating power device to achieve multi-stage magnification, reduction or change of direction.

[0015] Furthermore, the slide is provided with a length sensor for sensing movement or displacement.

[0016] The beneficial effects of the present invention are: it can effectively reduce or avoid the movement of the slide in the non-movement direction, that is, the jumping in the direction of the sliding platform, thereby improving the stability of the slide movement, thereby reducing the measurement error and achieving accurate measurement of the measured parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the detection platform of Example 1 of the present application;

[0018] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0019] Figure 3 yes Figure 2 A partial enlarged view of point C in the middle;

[0020] Figure 4 yes Figure 1 Sectional view at the middle BB;

[0021] Figure 5 yes Figure 1 Movement status Figure Ⅰ ;

[0022] Figure 6 yes Figure 1 Movement status Figure II ;

[0023] Figure 7 This is a front view of the detection platform of Example 2 of the present application;

[0024] Figure 8 yes Figure 7 Sectional view at AA in the middle;

[0025] Fig. 9 yes Figure 7 Sectional view at the middle BB;

[0026] Fig.10 yes Figure 7 Movement status Figure Ⅰ ;

[0027] Fig.11 yes Figure 7 Movement status Figure II .

[0028] In the above figures,

[0029] 1. Abutment; 2. Slide table;

[0030] 3. Motion conducting member; 31. Motion conducting member A; 32. Motion conducting member B;

[0031] 4. Connecting rod;

[0032] 5. lever plate; 51. rotating shaft; 52. lever plate A; 53. lever plate B; 54. positioning rod;

[0033] 61. C-coil magnet; 62. Combined magnet. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments:

[0035] Example 1

[0036] A pendulum-rotating direct-drive platform, such as Figures 1 to 6 As shown, it includes a base 1, a slide 2, a motion transmission member 3, a connecting rod 4 and a lever plate 5. Among them, the slide 2 is slidably arranged on the base 1. The motion transmission member 3 is arranged on the slide 2. In the figure, the slide 2 is connected by the motion transmission member 3, and the two ends of the motion transmission member 3 are respectively connected to the slide 2. The motion transmission member 3 has an obvious feature that it has strong rigidity in the movement direction of the slide 2 and weak rigidity in the non-movement direction, that is, the motion transmission member 3 can only transmit the force of the slide 2 in its movement direction, but not the force of the slide 2 vibrating up and down, thereby reducing the vibration of the slide 2 in the transmission of force. Preferably, the motion transmission member 3 can be a sheet-shaped member, a columnar member or a steel wire. The connecting rod 4 is arranged on the motion transmission member 3, which is used to control the reciprocating swing of the motion transmission member 3. The number of the lever plate 5 is one, which is a single-stage enlargement, reduction or change of direction. The lever plate 5 is rotatably arranged on the base 1 through a rotating shaft 51, and one end of the lever plate 5 is connected to the reciprocating power device and the other end is slidably connected to the connecting rod 4. Since one end of the lever plate 5 is connected to the reciprocating power device, the other end of the lever plate 5 also reciprocates. At this time, the connecting rod 4 is connected to the motion transmission member 3, and the motion trajectory of the connecting rod 4 is a straight line. Therefore, an arc groove can be set on the lever plate 5, and the center of the arc groove coincides with the axis of the rotating shaft 51. The connecting rod 4 is slidably set in the sliding groove of the lever plate 5, and the lever plate 5 transmits power to the connecting rod 4 through the arc groove.

[0037] The reciprocating power device of the present application can have multiple options, which can be a common crank rocker mechanism (not shown), where the motor drives the rocker to rotate and the crank swings back and forth, that is, the crank is fixed to the lever plate. In addition, it can also adopt an electromagnetic control method. The reciprocating power device includes a C-shaped coil magnet 61 and a combined magnet 62, such as Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the C-type coil magnet 61 is fixedly set on the base 1, and the wire on the C-type coil magnet 61 is connected to the alternating current. After the alternating current is connected, the N pole and S pole generated at the notch of the C-type coil magnet 61 change back and forth. The combined magnet 62 is movably set in the notch of the C-type coil magnet 61, and both ends of the combined magnet 62 are both N poles or S poles, and these two ends correspond to the notch settings of the C-type coil magnet 61 respectively. When the N pole and S pole of the C-type coil magnet 61 change back and forth, due to the influence of the magnetic field force, the two ends of the combined magnet 62 receive attraction and repulsion respectively, and the combined magnet 62 reciprocates. The combined magnet 62 is formed by connecting the same poles of two bipolar magnets. For example, if the S poles of two bar-shaped bipolar magnets are connected together, the two ends corresponding to the S poles are N poles, and the N poles are on the outside of the combined magnet 62.

[0038] When in use, a length sensing device can be set on the slide 2 for sensing the movement or displacement of the slide 2 and the measured surface. It can be a line rheostat, a grating ruler or an angle sensor. When the side is located above the slide 2, the C-coil magnet 61 is energized, and the combined magnet 62 swings under the action of electromagnetic force. Since the magnetic gap between the combined magnet 62 and the C-coil magnet 61 is very small, the leakage magnetic flux is small and the magnetic efficiency is high. The combined magnet 62 can generate fast, high-frequency, and high-thrust rotation under the action of electromagnetic force, and at the same time, it is amplified and transmitted to the motion transmission member 3 through the lever plate 5. The motion transmission member 3 is parallel to the movement direction of the slide 2. The motion transmission member 3 has a large rigidity in the movement direction of the slide 2 and can achieve a fast response. In the direction perpendicular to the movement of the slide 2, due to the small thickness and small rigidity, it can play a good vibration isolation role. Therefore, the connecting rod 4 indirectly drives the slide 2 to reciprocate through the motion transmission member 3. Since the motion transmission member 3 does not give the slide 2 an interference force in a non-movement direction, the distance detection mechanism can more accurately measure the displacement above. The slide 2 can minimize or avoid disturbances in the non-movement direction, so that the slide 2 moves only in the movement direction as much as possible, thereby achieving accurate measurement of the detection mechanism on the slide 2 as much as possible.

[0039] In addition, based on the above, if Figure 5 and Figure 6 As shown, the motion transmission member 3 includes a motion transmission member A31 and a motion transmission member B32. The motion transmission member A31 is fixedly arranged on the slide 2. The motion transmission member B32 is fixedly connected to the connecting rod 4. The motion transmission member A31 is fixedly arranged above the motion transmission member B32. On this basis, the motion transmission member A31 and the motion transmission member B32 are arranged at a certain angle. Figure 1The motion conducting member A31 and the motion conducting member B32 are arranged in a V shape. At this time, it is only necessary to ensure that the motion conducting member connected to the slide 2 meets the conditions of strong rigidity in the motion direction of the slide 2 and weak rigidity in the non-motion direction. The design of multiple combined motion conducting members 3 can adapt to more occasions and improve the design possibilities.

[0040] exist Figure 2 In the figure, let the length of the line of action of the force from the connection point of the connecting rod 4 and the lever plate 5 to the rotating shaft 51 be L1, and the length of the line of action of the force from the connection point of the lever plate 5 and the reciprocating swing device to the rotating shaft 51 be L2, and L1 is greater than L2. At this time, according to the principle of lever, the detection platform is a displacement amplification device, which can amplify a small displacement into a large displacement while keeping the frequency of reciprocating changes unchanged. As long as the distance difference between L1 and L2 is large enough, the displacement amplification factor is large enough to be suitable for large distance detection. On this basis, if L1 is less than L2 (not shown in the figure), the detection platform is a displacement reduction device, which can be designed for small distance detection, suitable for the detection of more precise instruments. If L1 is equal to L2, the detection platform is a reversing device.

[0041] Example 2

[0042] Different from Example 1, in this embodiment, Figures 7 to 11 As shown, the number of the lever plates 5 is N, N>1, and two adjacent lever plates 5 are hingedly connected in sequence through positioning rods 54. One of the lever plates 5 at the two ends is slidably connected to the connecting rod 4, and the other is connected to the reciprocating power device.

[0043] The following is an example of two lever plates 5: the lever plates 5 include lever plates A52 and lever plates B53, one end of the lever plate A52 is connected to the reciprocating power device, one end of the lever plate B53 is slidably connected to the connecting rod 4, and the other ends of the lever plates A52 and B53 are both hinged to the positioning rod 54. The single lever plate 5 in the above embodiment 1 is divided into two, and then hinged with the positioning rod, which can achieve a large multiple of displacement amplification and increase the scope of use. Similarly, it can also be designed as a reduction device to achieve displacement reduction.

[0044] The present invention is described above with reference to the preferred embodiments, but the protection scope of the present invention is not limited thereto. Various improvements can be made to the embodiments and parts thereof can be replaced with equivalents without departing from the scope of the present invention. As long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way, and any figure mark in the claims should not be regarded as limiting the claims involved. No matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. Therefore, all technical solutions falling within the scope of the claims are within the protection scope of the present invention.

Claims

1. A pendulum-rotation direct-drive platform, comprising a base (1), characterized in that: Also includes: A slide table (2) slidably disposed on the base table (1); A motion transmission component (3), wherein two ends of the motion transmission component (3) are respectively connected to the slide table (2), and the motion transmission component (3) has strong rigidity in the motion direction of the slide table (2) and weak rigidity in the non-motion direction; A connecting rod (4) is arranged on the motion transmission member (3) and is used to control the reciprocating swing of the motion transmission member (3); as well as The lever plate (5) is rotatably arranged on the base (1) via a rotating shaft (51); one end of the lever plate (5) is connected to the reciprocating power device, and the other end is slidably connected to the connecting rod (4); an arc groove is provided on the lever plate (5), the center of the arc groove coincides with the axis of the rotating shaft (51), the connecting rod (4) is slidably arranged in the sliding groove of the lever plate (5), and the lever plate (5) transmits power to the connecting rod (4) via the arc groove.

2. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The motion conducting member (3) is a sheet-shaped member.

3. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The motion conducting member (3) comprises a motion conducting member A (31) and a motion conducting member B (32), wherein the motion conducting member A (31) is fixedly arranged on the slide table (2), the motion conducting member B (32) is fixedly connected to the connecting rod (4), the motion conducting member A (31) is fixedly arranged above the motion conducting member B (32), and the motion conducting member A (31) and the motion conducting member B (32) are arranged at a certain angle.

4. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The reciprocating power device comprises: A C-shaped coil magnet (61) is fixedly mounted on the base (1), and a conducting wire on the C-shaped coil magnet (61) is connected to alternating current; The combined magnet (62) is movably arranged in the notch of the C-shaped coil magnet (61); the two opposite ends of the combined magnet (62) and the C-shaped coil magnet (61) have the same magnetic properties; the combined magnet (62) is formed by connecting two bipolar magnets with the same poles.

5. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The reciprocating power device is a crank rocker mechanism.

6. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The length of the line of action of the force from the connection point between the connecting rod (4) and the lever plate (5) to the rotating shaft (51) is L1, and the length of the line of action of the force from the connection point between the lever plate (5) and the reciprocating swing device to the rotating shaft (51) is L2, and L1 is greater than, less than or equal to L2.

7. The pendulum-rotation direct-drive platform according to claim 1 or 6, characterized in that: The number of the lever plate (5) is one, one end of the lever plate (5) is slidably connected to the connecting rod (4), and the other end is connected to the reciprocating power device.

8. The pendulum-rotation direct-drive platform according to claim 1 or 6, characterized in that: The number of the lever plates (5) is N, where N>1. Two adjacent lever plates (5) are hingedly connected in sequence via positioning rods (54). One of the lever plates (5) located at the two ends is slidably connected to the connecting rod (4), and the other is connected to a reciprocating power device.

9. The pendulum-rotation direct-drive platform according to claim 1, characterized in that: The slide table (2) is provided with a length sensing device for sensing and detecting movement or displacement.

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