Rotation angle accurate positioning device and positioning method

Abstract

The invention discloses a rotation angle accurate positioning device and a positioning method. The rotation angle accurate positioning device comprises a positioning seat, a rotating platform is arranged at the top of the positioning seat, a driving shaft is arranged below the center of the rotating platform, the bottom of the driving shaft is rotationally connected with the positioning seat, the bottom of the driving shaft is connected with the positioning seat, and the driving shaft can drive the rotating platform to rotate. A supporting shaft is further arranged on one side of the driving shaft, a plurality of sets of transmission gears which are meshed with one another are arranged on the supporting shaft and the driving shaft, and the driving shaft and the rotating platform are driven by the last set of transmission gears. The first group of transmission gears is driven by a pair of bevel gears, and the bevel gears are driven by a driving knob; a sensor for detecting the rotation angle of the driving shaft is arranged at the bottom of the driving shaft, fixing bolts are further arranged on the two sides of the driving shaft, and an initial angle adjusting device is further arranged on the outer side of the driving shaft.

Description

Technical Field

[0001] The invention relates to the field of rotation and positioning of a rotating platform, and in particular to a rotation angle precise positioning device and a positioning method. Background Art

[0002] ‌Rotation angle precise positioning‌ is designed to ensure that the workpiece can be accurately rotated around a certain axis to a specific angle position. This positioning plays an important role in industrial production, scientific research and daily life. Especially in some precision machining fields, after machining one side of the workpiece, it is often necessary to rotate the workpiece to another side, and then adjust the angle of the workpiece, and after the angle adjustment is completed, it needs to be fixed to ensure that it can withstand a certain impact without angle changes; however, the current angle adjustment device cannot meet the requirements of precision adjustment on the one hand, and on the other hand, after a certain impact, the angle will change, and there is no function to read the rotation angle. Summary of the invention

[0003] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a device and method for accurately positioning a rotation angle.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A device for accurately positioning a rotation angle comprises a positioning seat, a rotating platform is arranged at the top center of the positioning seat, a driving shaft is arranged below the center of the rotating platform, and the bottom of the driving shaft is rotatably connected to the positioning seat; a supporting shaft is also arranged on one side of the driving shaft, and a plurality of groups of mutually meshing transmission gears are arranged on the supporting shaft and the driving shaft, and the driving shaft and the rotating platform are driven by the last transmission gear; the first group of transmission gears is driven by a pair of bevel gears, and the bevel gears are driven by a driving knob; a sensor for detecting the rotation angle of the driving shaft is arranged at the bottom of the driving shaft, fixing bolts for fixing the driving shaft are also arranged on both sides of the driving shaft, and an initial angle adjustment device is also arranged on the outer side of the driving shaft.

[0005] As a further technical solution, the initial angle adjustment device includes an adjusting rod and a spring. The adjusting rod is arranged along the radial direction of the driving shaft, and is connected to the positioning seat on both sides of the adjusting rod through two obliquely arranged springs. A positioning hole is arranged on the side of the driving shaft. When the driving shaft is calibrated and rotated to the zero position, the adjusting rod is aligned with the positioning hole. Under the action of the spring, the adjusting rod can be inserted into the positioning hole, indicating that this position is the initial angle positioning position.

[0006] As a further technical solution, the initial angle adjustment device and the driving knob are arranged opposite to each other along the radial direction of the driving shaft.

[0007] As a further technical solution, the fixing bolt passes through the positioning seat and cooperates with the positioning seat thread. The drive shaft can be fixed by rotating the fixing bolt.

[0008] As a further technical solution, two fixing bolts are arranged opposite to each other on the positioning seat along the radial direction of the drive shaft.

[0009] As a further technical solution, the sensor uses an existing magnetic encoder to collect angles.

[0010] As a further technical solution, the total transmission ratio of the multiple sets of mutually meshing transmission gears is 32:1.

[0011] As a further technical solution, the magnetic encoder is connected to an electronic display screen for displaying its rotation angle.

[0012] In a second aspect, the present invention also provides a method for using the rotation angle precise positioning device, as follows: Step 1 Calibrate and position the rotation angle precision positioning device. Rotate the rotating platform by driving the knob. When the rotating platform rotates to the position of the adjustment rod, the adjustment rod will be inserted into the drive shaft under the action of the spring. At this time, the magnetic encoder records the current angle value of the drive shaft. Step 2 Install the workpiece on the rotating platform, pull the adjustment rod to disengage the adjustment rod from the drive shaft, turn the drive knob again, and when the display shows that the rotating platform has reached a suitable rotation angle, turn the two fixing bolts to fix the drive shaft with the two fixing bolts, and then process the workpiece.

[0013] The beneficial effects of the present invention are as follows: The present invention sets a rotating platform, and then drives the rotating platform to rotate through a transmission gear, and then cooperates with the sensor, fixing bolts and initial angle adjustment device at the bottom of the driving shaft to achieve real-time and accurate control of the workpiece angle while preventing the angle from changing; the present invention can adjust the angle of the workpiece accurately to 0.1° by setting the number of teeth and the transmission ratio of the transmission gear; and after measurement by a magnetic encoder, it can be displayed on an electronic display screen.

[0014] The initial angle adjustment device of the present invention determines the initial angle of the device through the cooperation of an adjustment rod and two springs with a positioning hole, and has a simple structure and low cost. After the initial angle is determined, the drive shaft is rotated, and the angle of rotation of the drive shaft is the angle of rotation of the workpiece. The data is then transmitted to the display screen through the sensor, and the display screen displays the angle for easy observation by the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] Figure 1 , Figure 2 It is a schematic diagram of the overall appearance structure of the rotation angle precise positioning device proposed by the present invention; Figure 3 It is a schematic diagram of the internal structure of the rotation angle precise positioning device; Figure 4 yes Figure 3 The schematic diagram of the internal structure after the rotating platform is omitted; Figure 5 is a schematic diagram of a drive shaft of a rotation angle precision positioning device; Figure 6 It is a schematic diagram of a positioning seat of a rotation angle precision positioning device; Figure 7 It is a schematic diagram of the principle of gear transmission of the rotation angle precise positioning device.

[0017] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for illustration only.

[0018] 1 positioning seat, 2 cover body, 3 driving shaft, 4 fixing bolt, 5 fixing bolt, 6 adjusting rod, 7 knob, 8 rotating platform, 9 spring, 10 gear, 11 supporting shaft, 12 bevel gear; 31 first section shaft, 32 second section shaft, 33 third section shaft, 34 positioning hole. DETAILED DESCRIPTION

[0019] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof; For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0021] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present invention proposes a rotation angle precise positioning device and method.

[0022] In a typical embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present embodiment provides a device for accurately positioning a rotation angle, comprising a positioning seat 1, a cover body 2 is arranged on the top of the positioning seat 1, a rotating platform 8 that can rotate relative to the cover body 2 is arranged at the center of the cover body 2, a driving shaft 3 is arranged below the center of the rotating platform, the bottom of the driving shaft 3 is rotatably connected to the positioning seat, the bottom of the driving shaft 3 is connected to the positioning seat 1, and a support shaft 11 is also arranged on one side of the driving shaft 3, the support shaft 11 and the driving shaft 3 are parallel to each other, and multiple groups of mutually meshing transmission gears 10 are arranged on the support shaft 11 and the driving shaft 3, the rotating platform 8 is driven by the last transmission gear, and the last transmission gear is interference fit with the driving shaft 3, so the rotation angle of the rotating platform can be detected by detecting the rotation angle of the driving shaft; the first group of transmission gears 10 is driven by a pair of bevel gears 12, and the bevel gear 12 is driven by a driving knob 7; a sensor for detecting its rotation angle is arranged at the bottom of the driving shaft 3, fixing bolts 4 and fixing bolts 5 are also arranged on both sides of the driving shaft 3, and an initial angle adjustment device is also arranged on the outer side of the driving shaft 3.

[0023] like Figure 3 , Figure 4As shown, the initial angle adjustment device in this embodiment includes an adjustment rod 6 and two springs. The structure is simple. The initial angle of the device is positioned only by the cooperation of an adjustment rod and two springs with the positioning hole. After the initial angle is positioned, the drive shaft is rotated again. At this time, the angle of rotation of the drive shaft is the angle of rotation of the workpiece. Then, it is measured by a magnetic encoder and displayed by an electronic display screen. Specifically, the initial angle adjustment device includes an adjustment rod 6 and two springs 9. The adjustment rod 6 is arranged along the radial direction of the drive shaft 3. The two sides of the adjustment rod 6 are connected to the positioning seat 1 through two inclined springs 9. A positioning hole is arranged on the side of the drive shaft 3. When the drive shaft 3 is calibrated and rotated to the starting position, the adjustment rod 6 is aligned with the alignment hole. Under the action of the spring 9, the adjustment rod 6 can be inserted into the positioning hole, indicating that this position is the initial angle positioning position. It should be further explained that the two springs 9 are inclined toward the fixing bolts 4 and 5 on their respective sides, and the two springs 9 are symmetrically arranged.

[0024] It should be further explained that the initial angle adjustment device and the driving knob 7 in this embodiment are arranged opposite to each other along the radial direction of the driving shaft 3 .

[0025] As a further technical solution, the rotation angle precision positioning device also includes a fixing bolt 4 and a fixing bolt 5. The fixing bolt 4 and the fixing bolt 5 pass through the positioning seat 1 and are threadedly matched with the positioning seat 1. By rotating the fixing bolt 4 and the fixing bolt 5, the drive shaft 3 can be fixed or loosened. Specifically, the two fixing bolts 4 and the fixing bolt 5 are relatively arranged on the positioning seat 1 along the radial direction of the drive shaft 3 to ensure that the drive shaft can be subjected to force on the left and right without problems such as offset; the axis of the fixing bolt 4 and the fixing bolt 5 is arranged at 90 degrees to the axis of the adjustment rod 6 and the axis of the drive knob 7, that is, the fixing bolt 4 and the fixing bolt 5, the adjustment rod 6 and the drive knob 7 are arranged in four directions: front, back, left and right, without interfering with each other, and each independently performs its own function.

[0026] Furthermore, the sensor at the bottom of the driving shaft 3 adopts a magnetic encoder in the prior art; the magnetic encoder is connected to a data display screen for displaying the rotation angle of the magnetic encoder, and then reading the rotation angle of the rotating platform.

[0027] Furthermore, the drive shaft 3 in this embodiment is as follows Figure 5 As shown, it includes three shaft sections, namely a first shaft section 31, a second shaft section 32 and a third shaft section 33, and the diameter relationship of each shaft section is: The diameter of the third section shaft 33 is larger than that of the first section shaft 31 and smaller than that of the second section shaft 32; the diameter of the second section shaft 32 is larger than that of the first section shaft 31; and a positioning hole 34 is provided on the second section shaft 32, and the positioning hole 34 cooperates with the adjustment rod 6; a magnetic encoder is installed at the bottom of the third section shaft 33 to detect the rotation angle of the drive shaft 3; the transmission gear 10 is mounted on the first section shaft 31, and the first section shaft 31 provides certain support for the transmission gear 10.

[0028] Further, the multiple groups of mutually meshing transmission gears 10 in the present embodiment specifically include bevel gear Z1, bevel gear Z2, spur gear Z3, spur gear Z4, spur gear Z5, spur gear Z6, spur gear Z7, spur gear Z8, spur gear Z9, spur gear Z10, spur gear Z11, and spur gear Z12; the bevel gear Z1 is meshed with the bevel gear Z2, and the bevel gear Z2 is integrally arranged with the spur gear Z3; the spur gear Z3 is meshed with the spur gear Z4, and the spur gear Z4 is integrally arranged with the spur gear Z5, and the spur gear Z5 is meshed with the spur gear Z6, and the spur gear Z6 and the spur gear Z7 are arranged in the same set, and the spur gear The wheel Z7 meshes with the spur gear Z8, the spur gear Z8 is integrally arranged with the spur gear Z10, the spur gear Z10 meshes with the spur gear Z9, the spur gear Z9 is integrally arranged with the spur gear Z11, and the spur gear Z11 meshes with the spur gear Z12; and the transmission ratio of the bevel gear Z1 and the bevel gear Z2 is 1:1, the transmission ratio of the spur gear Z3 and the spur gear Z4 is 1:2; the transmission ratio of the spur gear Z5 and the spur gear Z6 is 1:2; the transmission ratio of the spur gear Z7 and the spur gear Z8 is 1:2; the transmission ratio of the spur gear Z10 and the spur gear Z9 is 1:2; the transmission ratio of the spur gear Z11 and the spur gear Z12 is 1:2; The number of teeth of each gear: the number of teeth of bevel gear Z1 and bevel gear Z2 are both 12; the number of teeth of spur gear Z3, spur gear Z5, spur gear Z7, spur gear Z10, and spur gear Z11 are all 20; the number of teeth of spur gear Z4, spur gear Z6, spur gear Z8, spur gear Z9, and spur gear Z12 are all 40.

[0029] Through the above gear design, the total transmission ratio is 32:1, that is, when the knob rotates 3.2 degrees, the angle of the rotating platform can change by 0.1 degrees, thus achieving precise control of the rotating platform.

[0030] The principle of angle measurement in this embodiment is as follows: Finally, the spur gear Z12 drives the rotating platform 8 and the driving shaft 3 to rotate synchronously, and the rotation angle of the rotating platform 8 is measured by the rotation angle of the driving shaft 3. Specifically, a fixed key is provided on the top of the spur gear Z12, and the rotating platform 8 is connected to the rotating platform 8 through the fixed key on the top.

[0031] Furthermore, the bevel gear Z2 , the spur gear Z3 , the spur gear Z6 , the spur gear Z7 , the spur gear Z9 , and the spur gear Z11 are supported by a support shaft 11 , and the support shaft 11 is fixed on the positioning seat 1 .

[0032] Furthermore, the positioning seat 1 in this embodiment is a square positioning seat, with a cover body on the top of the positioning seat, and holes are set on the four sides of the positioning seat, two of which are threaded holes, and the threaded holes are threadedly matched with the fixing bolts 4 and 5. One of the holes is for the adjustment rod to pass through, and the other is for the driving knob 7 to pass through; a hole is also set on the bottom surface of the positioning seat, which is matched with the driving shaft.

[0033] The positioning method of the above-mentioned rotation angle precise positioning device is as follows: Step 1 Calibrate and position the rotation angle precision positioning device. Rotate the rotating platform 8 by driving the knob 7. When the rotating platform 8 rotates to the position of the adjustment rod 6, the adjustment rod 6 is inserted into the positioning hole of the drive shaft 3 under the action of the spring 9. At this time, the magnetic encoder records the current angle value of the drive shaft 3. Step 2 Install the workpiece to be processed on the rotating platform 8, pull the adjustment rod 6 to disengage the adjustment rod 6 from the positioning hole, turn the drive knob 7 again, when the display screen shows that the rotating platform 8 has rotated to a suitable angle, turn the two fixing bolts 4 and 5, fix the drive shaft 3 with the two fixing bolts 4 and 5, and then process the workpiece.

[0034] The present invention sets a rotating platform, drives the rotating platform to rotate through a transmission gear, and then cooperates with the sensor, fixing bolt and initial angle adjustment device at the bottom of the drive shaft to achieve real-time control of the workpiece angle. By setting the number of teeth and transmission ratio of the transmission gear, the angle of the workpiece can be adjusted accurately to 0.1°; and after being measured by a magnetic encoder, it is displayed on a digital display screen.

[0035] Finally, it should be noted that relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotation angle precise positioning device, characterized in that: It includes a positioning seat, a rotating platform is arranged at the top center of the positioning seat, a driving shaft is arranged below the center of the rotating platform, and the bottom of the driving shaft is rotatably connected to the positioning seat; a supporting shaft is also arranged on one side of the driving shaft, and multiple groups of mutually meshing transmission gears are arranged on the supporting shaft and the driving shaft, and the driving shaft and the rotating platform are driven by the last transmission gear; the first group of transmission gears is driven by a pair of bevel gears, and the bevel gears are driven by a driving knob; a sensor for detecting the rotation angle of the driving shaft is arranged at the bottom of the driving shaft, fixing bolts for fixing the driving shaft are also arranged on both sides of the driving shaft, and an initial angle adjustment device is also arranged on the outer side of the driving shaft.

2. The rotation angle precise positioning device according to claim 1, characterized in that: The initial angle adjustment device comprises an adjustment rod and a spring. The adjustment rod is arranged along the radial direction of the driving shaft. Both sides of the adjustment rod are connected to the positioning seat through two inclined springs. A positioning hole is arranged on the side of the driving shaft.

3. The rotation angle precise positioning device according to claim 2, characterized in that: The initial angle adjustment device and the driving knob are arranged opposite to each other along the radial direction of the driving shaft.

4. The rotation angle precise positioning device according to claim 2, characterized in that: The two springs are both inclined toward the fixing bolts on their respective sides, and the two springs are symmetrically arranged.

5. The rotation angle precise positioning device according to claim 1, characterized in that: The fixing bolt passes through the positioning seat and is matched with the thread of the positioning seat.

6. The rotation angle precise positioning device according to claim 4, characterized in that: The two fixing bolts are arranged opposite to each other on the positioning seat along the radial direction of the driving shaft.

7. The rotation angle precise positioning device according to claim 1, characterized in that: The sensor is a magnetic encoder.

8. The rotation angle precise positioning device according to claim 6, characterized in that: The magnetic encoder is connected to an electronic display screen for displaying its rotation angle.

9. The rotation angle precise positioning device according to claim 1, characterized in that: The total transmission ratio of the multiple sets of mutually meshing transmission gears is 32:

1.

10. The method for using the rotation angle precise positioning device according to any one of claims 2 to 9, characterized in that: as follows: Step 1 Calibrate and position the rotation angle precision positioning device. Rotate the rotating platform by driving the knob. When the rotating platform rotates to the position of the adjustment rod, the adjustment rod will be inserted into the drive shaft under the action of two springs. At this moment, the magnetic encoder records the current angle value of the drive shaft. Step 2 Install the workpiece on the rotating platform, pull out the adjustment rod to disengage the adjustment rod from the drive shaft, turn the drive knob again, and when the display shows that the rotating platform has reached a suitable rotation angle, turn the two fixing bolts to fix the drive shaft with the two fixing bolts, and then process the workpiece.

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