Molecular pump main shaft dynamic balance detection driving assembly

Abstract

The utility model relates to a molecular pump main shaft dynamic balance detection driving assembly, which is characterized in that a rotating plate is rotatably connected with a fixed seat through a first rotating shaft, a cavity is formed between the rotating plate and the fixed seat, one end of the rotating plate far away from the first rotating shaft is fixed with the fixed seat through a fixing mechanism, and a driving wheel is rotatably connected with the fixed seat; the first driven wheel rotates relative to the fixing base, the motor is fixedly connected with the fixing base and drives the driving wheel to rotate, the third driven wheel is rotationally connected with the rotating plate, and the belt makes contact with the driving wheel, the first driven wheel and the third driven wheel. According to the utility model, the rotating plate is rotatably connected with the fixed seat, the main shaft is buckled with the rotating plate after being placed, and then the rotating plate is fixed with the fixed seat, so that the main shaft is simple and convenient to mount and take out; the positions of the bolts can be adjusted through the arc-shaped grooves, and the position of the rotating plate relative to the fixing base is adjusted during fixing, so that the device adapts to spindles with different diameters.

Description

Technical Field

[0001] The utility model relates to the field of a main shaft dynamic balance detection driving device, in particular to a main shaft dynamic balance detection driving assembly of a molecular pump. Background Art

[0002] Due to the limitation of the existing structure, the existing spindle dynamic balance detection device has complicated spindle installation and removal operation steps, which increases the time and reduces the detection efficiency. At the same time, the existing drive assembly needs to be adjusted separately when detecting spindles of different diameters, which further reduces the detection efficiency. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a molecular pump main shaft dynamic balance detection drive assembly to solve the above technical problems.

[0004] A molecular pump spindle dynamic balance detection drive assembly comprises: a fixed seat, a motor, a rotating plate, a driving wheel, a first driven wheel, a third driven wheel, a first rotating shaft and a belt, the rotating plate is rotatably connected to the fixed seat through the first rotating shaft, a cavity is formed between the rotating plate and the fixed seat, one end of the rotating plate away from the first rotating shaft is fixed to the fixed seat through a fixing mechanism, the driving wheel is rotatably connected to the fixed seat, the first driven wheel rotates relative to the fixed seat, the motor is fixedly connected to the fixed seat and drives the driving wheel to rotate, the third driven wheel is rotatably connected to the rotating plate, and the belt contacts the driving wheel, the first driven wheel and the third driven wheel respectively.

[0005] Based on the above technical solution, the fixing mechanism includes an installation box, a second rotating shaft, a bolt and a transmission mechanism. The installation box is fixedly connected to the rotating plate, the second rotating shaft passes through the installation box and is rotatably connected to the installation box, the second rotating shaft is perpendicular to the first rotating shaft, the axis of the bolt is parallel to the first rotating shaft, and the second rotating shaft drives the bolt to tighten the fixing seat through the transmission mechanism.

[0006] Based on the above technical solution, the transmission mechanism includes a nut, a first bevel gear and a second bevel gear, the second rotating shaft is fixedly connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly connected to the nut, the rotating plate is formed with a through hole, the nut is inserted into the through hole and is rotatably connected to the through hole, the bolt is inserted into the nut and is threadedly connected to the nut, and the bolt moves linearly along the axis of the nut.

[0007] Based on the above technical solution, the transmission mechanism also includes a limit block, which is fixedly connected to the rotating plate, a slide groove is formed on the side of the bolt, the limit block is inserted into the slide groove, and the bolt is slidably connected to the limit block.

[0008] Based on the above technical solution, the fixing seat is formed with a groove with an upper opening, the groove is an arc, the bolt is slidably connected to the groove, and the diameter of the bolt is equal to the width of the groove.

[0009] Based on the above technical solution, the fixing mechanism further includes a knob, and the knob is fixedly connected to the second rotating shaft.

[0010] On the basis of the above technical solution, it also includes a first tensioning wheel, a second tensioning wheel, a first slider and a second slider, the fixed seat is formed with a first adjustment hole, the first slider is slidably connected to the first adjustment hole, the first tensioning wheel is rotatably connected to the first slider, the first tensioning wheel is in contact with the belt, the rotating plate is formed with a second adjustment hole, the second slider is slidably connected to the second adjustment hole, the second tensioning wheel is rotatably connected to the second slider, and the second tensioning wheel is in contact with the belt.

[0011] Based on the above technical solution, it also includes a second driven wheel and a third driven wheel, the second driven wheel is rotatably connected to the fixed seat, the second driven wheel is in contact with the belt, the third driven wheel is rotatably connected to the rotating plate, and the third driven wheel is in contact with the belt.

[0012] Based on the above technical solution, it also includes a rotation speed sensor, and the rotation speed sensor is fixed relative to the fixing seat.

[0013] On the basis of the above technical solution, it also includes a mounting plate, the first driven wheel is rotatably connected to the mounting plate, and the mounting plate is fixedly connected to the mounting box.

[0014] The utility model has the following advantages:

[0015] 1. The rotating plate is rotatably connected to the fixed seat. Place the main shaft and then buckle the rotating plate, and then fix the rotating plate to the fixed seat. The installation and removal of the main shaft is simple and convenient;

[0016] 2. The arc-shaped groove can adjust the position of the bolt and adjust the position of the rotating plate relative to the fixed seat when fixing, so as to adapt to spindles of different diameters.

[0017] 3. The bolt is driven to move in a straight line through the transmission mechanism. The knob is located in front of the fixed seat of the rotating plate. The user does not need to fix the rotating plate and the fixed seat to the side. In subsequent tests, the user can directly face the screen without changing position, which improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 : A schematic diagram of the three-dimensional structure of the utility model (bolts are not shown);

[0020] Figure 2 : The second schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 3 : A right-side structural schematic diagram of the utility model;

[0022] Figure 4 :exist Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0023] Figure 5 :exist Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0024] Figure 6 : A schematic diagram of the three-dimensional structure of the utility model when working. DETAILED DESCRIPTION

[0025] The utility model is further described below with reference to the accompanying drawings and examples:

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Embodiment 1:

[0030] like Figures 1 to 6 As shown, this embodiment provides a molecular pump spindle dynamic balance detection drive assembly, including: a fixed seat 3, a motor 4, a rotating plate 8, a driving wheel 31, a first driven wheel 32, a third driven wheel 83, a first rotating shaft 85 and a belt 9, the rotating plate 8 is rotatably connected to the fixed seat 3 through the first rotating shaft 85, a cavity 80 is formed between the rotating plate 8 and the fixed seat 3, one end of the rotating plate 8 away from the first rotating shaft 85 is fixed to the fixed seat 3 through a fixing mechanism, the driving wheel 31 is rotatably connected to the fixed seat 3, the first driven wheel 32 rotates relative to the fixed seat 3, the motor 4 is fixedly connected to the fixed seat 3 and drives the driving wheel 31 to rotate, the third driven wheel 83 is rotatably connected to the rotating plate 8, and the belt 9 is in contact with the driving wheel 31, the first driven wheel 32 and the third driven wheel 83 respectively.

[0031] Based on the above technical solution, the fixing mechanism includes an installation box 36, a second rotating shaft 37, a bolt 39 and a transmission mechanism. The installation box 36 is fixedly connected to the rotating plate 8, the second rotating shaft 37 passes through the installation box 36 and is rotatably connected to the installation box 36, the second rotating shaft 37 is perpendicular to the first rotating shaft 85, the axis of the bolt 39 is parallel to the first rotating shaft 85, and the second rotating shaft 37 drives the bolt 39 through the transmission mechanism to tighten the fixing seat 3.

[0032] On the basis of the above technical solution, the transmission mechanism includes a nut 38, a first bevel gear 371 and a second bevel gear 381, the second rotating shaft 37 is fixedly connected to the first bevel gear 371, the first bevel gear 371 is meshed with the second bevel gear 381, the second bevel gear 381 is fixedly connected to the nut 38, the rotating plate 8 is formed with a through hole 84, the nut 38 is inserted into the through hole 84 and is rotatably connected to the through hole 84, the bolt 39 is inserted into the nut 38 and is threadedly connected to the nut 38, and the bolt 39 moves linearly along the axis of the nut 38. Preferably, the diameter of the second bevel gear 381 is larger than that of the first bevel gear 371, so as to increase the torque and make the bolt 39 pressed tighter.

[0033] Based on the above technical solution, the transmission mechanism also includes a limit block 841, which is fixedly connected to the rotating plate 8, a slide groove 391 is formed on the side of the bolt 39, the limit block 841 is inserted into the slide groove 391, and the bolt 39 is slidably connected to the limit block 841.

[0034] Based on the above technical solution, the fixing seat 3 is formed with a groove 30 with an upper opening, the groove 30 is an arc, the bolt 39 is slidably connected to the groove 30, and the diameter of the bolt 39 is equal to the width of the groove 30.

[0035] Based on the above technical solution, the fixing mechanism further includes a knob 372 , and the knob 372 is fixedly connected to the second rotating shaft 37 .

[0036] On the basis of the above technical solution, it also includes a first tensioning wheel 33, a second tensioning wheel 81, a first slider 331 and a second slider 811, the fixed seat 3 is formed with a first adjustment hole 35, the first slider 331 is slidably connected to the first adjustment hole 35, the first tensioning wheel 33 is rotatably connected to the first slider 331, the first tensioning wheel 33 is in contact with the belt 9, the rotating plate 8 is formed with a second adjustment hole 82, the second slider 811 is slidably connected to the second adjustment hole 82, the second tensioning wheel 81 is rotatably connected to the second slider 811, and the second tensioning wheel 81 is in contact with the belt 9. The first slider 331 and the second slider 811 can be respectively threadedly connected with screws, and the screws press the fixed seat 3 and the rotating plate 8 to fix the positions of the first slider 331 and the second slider 811. The first slider 331 and the second slider 811 can also be respectively connected with springs, and the other ends of the springs are respectively connected to the fixed seat 3 and the rotating plate 8. Among them, the screws and springs are not shown in the figure.

[0037] Preferably, the first adjustment hole 35 is an arc, and the second adjustment hole 82 is a straight line.

[0038] On the basis of the above technical solution, it also includes a second driven wheel 34 and a third driven wheel 83, wherein the second driven wheel 34 is rotationally connected to the fixed seat 3, the second driven wheel 34 contacts the belt 9, and the third driven wheel 83 is rotationally connected to the rotating plate 8, and the third driven wheel 83 contacts the belt 9.

[0039] On the basis of the above technical solution, a rotation speed sensor 6 is further included, and the rotation speed sensor 6 is fixed relative to the fixing seat 3. Preferably, the rotation speed sensor 6 is an infrared rotation speed sensor.

[0040] On the basis of the above technical solution, it further includes a mounting plate 361 , the first driven wheel 32 is rotatably connected to the mounting plate 361 , and the mounting plate 361 is fixedly connected to the mounting box 36 .

[0041] During operation, both ends of the main shaft 7 are supported by the bracket 2, and the rotating plate 8 is rotated to make the belt 9 contact the middle of the main shaft 7. The first slider 331 slides in the first adjustment hole 35, and the second slider 811 slides in the second adjustment hole 82. By changing the positions of the first tensioning wheel 33 and the second tensioning wheel 81, the belt 9 is tensioned, so that the belt 9 can drive the main shaft 7 to rotate.

[0042] The rotating knob 372 is turned to drive the rotating shaft 37 to rotate, thereby driving the nut 38 to rotate, and the expanded portion of the bolt 39 moves toward the fixing seat 3 until the expanded portion of the bolt 39 presses the fixing seat 3, thereby fixing the position of the fixing seat 3 and the rotating plate 8.

[0043] Then the motor 4 is started to drive the driving wheel 31 to rotate, and the driving wheel 31 drives the main shaft 7 to rotate through the belt 9. The speed sensor 6 is aligned with the main shaft 7 to detect the actual speed of the main shaft 7. The vibration sensor installed on the bracket 2 detects the amplitude of the vibration. The speed and amplitude are displayed on the display installed on the frame 10. If the vibration amplitude is too large, it means that the main shaft 7 has not reached dynamic balance.

[0044] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A molecular pump spindle dynamic balance detection drive assembly, characterized in that: include: A fixed seat (3), a motor (4), a rotating plate (8), a driving wheel (31), a first driven wheel (32), a third driven wheel (83), a first rotating shaft (85) and a belt (9); the rotating plate (8) is rotatably connected to the fixed seat (3) via the first rotating shaft (85); a cavity (80) is formed between the rotating plate (8) and the fixed seat (3); one end of the rotating plate (8) away from the first rotating shaft (85) is fixed to the fixed seat (3) via a fixing mechanism; the driving wheel (31) is rotatably connected to the fixed seat (3); the first driven wheel (32) rotates relative to the fixed seat (3); the motor (4) is fixedly connected to the fixed seat (3) and drives the driving wheel (31) to rotate; the third driven wheel (83) is rotatably connected to the rotating plate (8); and the belt (9) contacts the driving wheel (31), the first driven wheel (32) and the third driven wheel (83) respectively.

2. A molecular pump spindle dynamic balance detection drive assembly according to claim 1, characterized in that: The fixing mechanism comprises an installation box (36), a second rotating shaft (37), a bolt (39) and a transmission mechanism; the installation box (36) is fixedly connected to the rotating plate (8); the second rotating shaft (37) passes through the installation box (36) and is rotationally connected to the installation box (36); the second rotating shaft (37) is perpendicular to the first rotating shaft (85); the axis of the bolt (39) is parallel to the first rotating shaft (85); and the second rotating shaft (37) drives the bolt (39) through the transmission mechanism to press the fixing seat (3).

3. A molecular pump spindle dynamic balance detection drive assembly according to claim 2, characterized in that: The transmission mechanism comprises a nut (38), a first bevel gear (371) and a second bevel gear (381); the second rotating shaft (37) is fixedly connected to the first bevel gear (371); the first bevel gear (371) is meshed with the second bevel gear (381); the second bevel gear (381) is fixedly connected to the nut (38); the rotating plate (8) is formed with a through hole (84); the nut (38) is inserted into the through hole (84) and is rotatably connected to the through hole (84); the bolt (39) is inserted into the nut (38) and is threadedly connected to the nut (38); the bolt (39) moves linearly along the axis of the nut (38).

4. A molecular pump main shaft dynamic balance detection drive assembly according to claim 3, characterized in that: The transmission mechanism further comprises a limit block (841), the limit block (841) being fixedly connected to the rotating plate (8), a sliding groove (391) being formed on the side of the bolt (39), the limit block (841) being inserted into the sliding groove (391), and the bolt (39) being slidably connected to the limit block (841).

5. The molecular pump main shaft dynamic balance detection drive assembly according to claim 2, characterized in that: The fixing seat (3) is formed with a groove (30) with an upper opening, the groove (30) is an arc, the bolt (39) is slidably connected to the groove (30), and the diameter of the bolt (39) is equal to the width of the groove (30).

6. The molecular pump spindle dynamic balance detection drive assembly according to claim 2, characterized in that: The fixing mechanism further comprises a knob (372), and the knob (372) is fixedly connected to the second rotating shaft (37).

7. The molecular pump main shaft dynamic balance detection drive assembly according to claim 1, characterized in that: It also includes a first tensioning wheel (33), a second tensioning wheel (81), a first slider (331) and a second slider (811); the fixed seat (3) is formed with a first adjustment hole (35); the first slider (331) is slidably connected to the first adjustment hole (35); the first tensioning wheel (33) is rotationally connected to the first slider (331); the first tensioning wheel (33) is in contact with the belt (9); the rotating plate (8) is formed with a second adjustment hole (82); the second slider (811) is slidably connected to the second adjustment hole (82); the second tensioning wheel (81) is rotationally connected to the second slider (811); and the second tensioning wheel (81) is in contact with the belt (9).

8. The molecular pump main shaft dynamic balance detection drive assembly according to claim 1, characterized in that: It also includes a second driven wheel (34) and a third driven wheel (83), wherein the second driven wheel (34) is rotationally connected to the fixed seat (3), the second driven wheel (34) is in contact with the belt (9), and the third driven wheel (83) is rotationally connected to the rotating plate (8), and the third driven wheel (83) is in contact with the belt (9).

9. The molecular pump main shaft dynamic balance detection drive assembly according to claim 1, characterized in that: It also includes a rotation speed sensor (6), wherein the rotation speed sensor (6) is fixed in position relative to the fixing seat (3).

10. The molecular pump main shaft dynamic balance detection drive assembly according to claim 2, characterized in that: It also includes a mounting plate (361), the first driven wheel (32) is rotatably connected to the mounting plate (361), and the mounting plate (361) is fixedly connected to the mounting box (36).

Images