Vertical reciprocating oscillation device for centrifugal tube

Abstract

The utility model discloses a vertical reciprocating oscillation device for a centrifugal tube, which relates to the technical field of pretreatment of analytical instruments and comprises a base plate, foot columns, a motor mounting plate, a driving motor, a driving wheel, a vertical plate, an L-shaped corner connector, a linear guide rail, a sliding block, a limiting part, a bearing seat, a bearing, a rotating shaft, a driven wheel, an eccentric block, a reciprocating module, an oscillation module and a damping part. When the oscillation device works, the driving motor is started to drive the driving wheel to start to rotate, the driving wheel drives the driven wheel to rotate synchronously through the belt, the driven wheel is fixedly connected with the rotating shaft, the rotating shaft rotates along with the driven wheel, and the eccentric block rotates. When the eccentric block rotates, only the reciprocating module is driven to move up and down in the vertical direction, vertical reciprocating oscillation is conducted on the oscillation module, and foot columns, limiting parts and damping parts in the oscillation device are all rubber parts and used for absorbing oscillation and avoiding noise.

Description

TECHNICAL FIELD

[0001] The utility model relates to analytical instrument pre -treatment technical field, concretely is a centrifugal tube vertical reciprocating oscillation device. BACKGROUND

[0002] Current centrifugal tube oscillation device mostly uses DC brush motor as driving element, its life is lower, reciprocating oscillation movement process, when commutating, produces bigger noise, in order to reduce the friction in reciprocating movement, often will smear lubricating oil, and lubricating oil is easy to leak, pollutes the environment, at the same time in order to avoid in the oscillation process, centrifugal tube is thrown out, often needs to increase additional mechanism to limit centrifugal tube movement, and when limiting centrifugal tube movement must avoid the axial excursion of centrifugal tube completely, the higher requirement of higher production cost to part machining progress. SUMMARY

[0003] The utility model discloses a centrifugal tube vertical reciprocating oscillation device to solve the problem in prior art.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] Oscillation device includes base plate, foot column, motor mounting plate, drive motor, driving wheel, stand, L type corner code, linear guide, sliding block, limiting part, bearing seat, bearing, rotating shaft, driven wheel, eccentric block, reciprocating module, oscillation module and damping piece, the foot column and base plate fixed connection, the foot column is located at the lower end four around angle of base plate, the motor mounting plate and damping piece fixed connection, the damping piece and base plate fixed connection, the damping piece is located between motor mounting plate and base plate, the drive motor and motor mounting plate fixed connection, the output shaft of drive motor and driving wheel fixed connection, one right angle of L type corner code and base plate fixed connection, the other right angle of L type corner code and stand fixed connection, the stand sets up driving wheel one side on base plate, the stand and base plate fixed connection, the linear guide and stand fixed connection, the linear guide is vertically arranged on the side of stand facing driving wheel, the limiting part and stand fixed connection, the limiting part is located at both ends of linear guide, the bearing seat and stand fixed connection, the central axis of bearing seat and the central axis of driving wheel are parallel, the bearing is arranged in bearing seat, the outer ring of bearing and bearing seat fixed connection, the rotating shaft passes through bearing, driven wheel and eccentric block in proper order, the rotating shaft and bearing, driven wheel and eccentric block fixed connection, the driven wheel and driving wheel are connected through belt transmission, the reciprocating module and eccentric block fixed connection, the reciprocating module and sliding block fixed connection, the sliding block and linear guide sliding connection, the reciprocating module and oscillation module fixed connection.

[0006] When the oscillation device is working, the driving motor is started, and the driving wheel is driven to rotate, the driving wheel drives the driven wheel to rotate synchronously through the belt, the driven wheel and the rotating shaft are fixedly connected, the rotating shaft rotates with the driven wheel, the eccentric block rotates, and the reciprocating module and the slider are fixedly connected, so that the eccentric block drives the reciprocating module to move vertically up and down when the eccentric block rotates, the reciprocating module is vertically reciprocated, and the foot column, the limiting part and the damping part in the oscillation device are all rubber parts, the parts made of rubber are used for absorbing oscillation and avoiding noise, and the limiting part also has the functions of avoiding the slider from exceeding the stroke and improving the safety of the oscillation device.

[0007] Further, threaded holes are arranged at two ends of the rotating shaft, a shaft shoulder and a groove are arranged on the rotating shaft, a flat key is arranged in the groove on the rotating shaft, one end face of the shaft shoulder abuts against the driven wheel, and the other end face of the shaft shoulder abuts against the bearing, and the threaded holes at the two ends of the rotating shaft are threadedly connected with a screw respectively, one end face of the screw abuts against the eccentric block, and the other screw abuts against the bearing.

[0008] The threaded hole at one end of the rotating shaft is threadedly connected with the screw, and one end face of the screw and one end face of the shaft shoulder are matched to clamp and fix the bearing, the threaded hole at the other end of the rotating shaft is threadedly connected with the other screw, and one end face of the screw and the other end face of the shaft shoulder are matched to clamp and fix the driven wheel and the eccentric block, and axial positioning of the rotating shaft, the driven wheel and the eccentric block is completed.

[0009] Further, the driven wheel is provided with a through groove, and the flat key passes through the through groove on the driven wheel.

[0010] The flat key passes through the groove on the rotating shaft and the through groove on the driven wheel, and circumferential positioning of the driven wheel and the rotating shaft is completed.

[0011] Further, the eccentric block is provided with a through groove, and the flat key passes through the through groove on the eccentric block.

[0012] The flat key passes through the groove on the rotating shaft, the through groove on the driven wheel and the through groove on the eccentric block in sequence, and circumferential positioning of the driven wheel, the rotating shaft and the eccentric block is completed.

[0013] Further, the reciprocating module comprises a driving shaft, a roller, a reciprocating plate, an oil baffle, a sealing part and an L-shaped connecting seat, one end of the driving shaft is fixedly connected with the eccentric block, the other end of the driving shaft is connected with the roller, the reciprocating plate is provided with a channel, the two sides of the channel on the reciprocating plate are provided with sealing grooves, the sealing part is arranged in the sealing groove, the oil baffles are arranged on the two sides of the reciprocating plate, the oil baffles are fixedly connected with the reciprocating plate, the oil baffles block the channel and the sealing groove on the reciprocating plate, the oil baffles press the sealing part, the oil baffles on the side close to the driven wheel are provided with a fine groove, the driving shaft passes through the fine groove on the oil baffle, the roller is arranged in the channel on the reciprocating plate, one straight angle of the L-shaped connecting seat is fixedly connected with the reciprocating plate, and the other straight angle of the L-shaped connecting seat is fixedly connected with the oscillation module.

[0014] The channel in the reciprocating plate is filled with lubricating oil, the reciprocating plate blocks the channel on the reciprocating plate in cooperation with the oil baffles on the two sides, and the sealing part is pressed at the same time, so that the leakage of the lubricating oil is prevented, the fine groove on the oil baffle is insufficient to allow the lubricating oil to flow out, the eccentric block drives the movement of the driving shaft when rotating, the driving shaft drives the movement of the roller in the channel on the reciprocating plate, the roller drives the reciprocating plate when moving, and since the reciprocating plate is fixedly connected with the sliding block, only the vertical degree of freedom exists, the reciprocating plate moves vertically on the linear guide rail along with the sliding block, and then the oscillation device is oscillated, the L-shaped connecting seat is provided with a wiring groove, so that the wire is combed, and the wire is prevented from interfering with the oscillation process.

[0015] Further, the roller outer ring is wrapped with a nylon part.

[0016] The nylon material has good self-lubricating property and low friction coefficient, can make the roller move smoothly in the channel of the reciprocating plate, and make the oscillation device run more smoothly as a whole.

[0017] Further, the oscillation module comprises an oscillation base, an oscillation cup, a gas cylinder, a rigid part, a flexible part and a centrifugal tube, the oscillation base is fixedly connected with one straight angle of the L-shaped connecting seat, the oscillation cup is fixedly connected with the oscillation base, the oscillation base is fixedly connected with the gas cylinder, the gas cylinder passes through the oscillation cup, the output end of the gas cylinder is fixedly connected with the rigid part, the oscillation cup is provided with a circular hole, the flexible part is embedded in the circular hole on the oscillation cup, and the centrifugal tube is placed in the flexible part.

[0018] When the oscillation device is ready to oscillate, the centrifugal tube is placed in the flexible part, the gas cylinder is started, the gas cylinder drives the rigid part, the flexible part is clamped and fixed to the centrifugal tube, the flexible part is made of flexible polyurethane material, plays a role of shock absorption and buffering in the oscillation process, protects the centrifugal tube, and prevents the centrifugal tube from being broken and causing loss.

[0019] Further, the oscillation cup is made of plastic material.

[0020] The plastic material is relatively light, which greatly reduces the load of the driving motor.

[0021] Further, the driving motor is a stepping motor.

[0022] Using the stepping motor as the driving element avoids the low service life problem caused by the brush motor.

[0023] Further, the reciprocating plate is made of plastic material.

[0024] The plastic material is relatively light, which greatly reduces the load of the driving motor.

[0025] Compared with the prior art, the utility model has the advantages that:

[0026] 1. The utility model uses the oil baffle to avoid the leakage of lubricating oil;

[0027] 2. The utility model uses the synchronous wheel transmission, and appropriate transmission ratio can be selected to realize speed increasing or increase output torque;

[0028] 3. The reciprocating plate and the oscillation cup of the utility model are made of plastic material, which greatly reduces the load of the stepping motor;

[0029] 4. The linear guide rail is provided with flexible rubber material parts at both ends, so that the motion part is prevented from exceeding the stroke, and the mechanism safety is improved;

[0030] 5. The utility model uses the stepping motor as the driving element to avoid the low service life problem caused by the brush motor. DRAWINGS

[0031] Figure 1 It is a whole structure schematic view of the centrifugal tube vertical reciprocating oscillation device of the utility model;

[0032] Figure 2 It is a partial structure schematic view of the centrifugal tube vertical reciprocating oscillation device of the utility model;

[0033] Figure 3 It is a partial structure schematic view of the oscillation module and the reciprocating module of the centrifugal tube vertical reciprocating oscillation device of the utility model;

[0034] Figure 4 It is a connection structure section view schematic view of the rotating shaft, the bearing, the driven wheel and the eccentric block of the centrifugal tube vertical reciprocating oscillation device of the utility model;

[0035] Figure 5 It is a connection schematic view of the reciprocating plate and the sealing part of the centrifugal tube vertical reciprocating oscillation device of the utility model.

[0036] In the figure: 1, base plate; 2, foot column; 3, motor mounting plate; 4, driving motor; 5, driving wheel; 6, vertical plate; 7, L-shaped corner code; 8, linear guide rail; 9, sliding block; 10, limiting part; 11, bearing seat; 12, bearing; 13, rotating shaft; 14, driven wheel; 15, eccentric block; 16, reciprocating module; 17, oscillation module; 18, damping part; 20, belt; 131, shaft shoulder; 132, flat key; 133, screw; 161, driving shaft; 162, roller; 163, reciprocating plate; 164, oil baffle; 165, sealing part; 166, L-shaped connecting seat; 167, nylon material part; 171, oscillation base; 172, oscillation cup; 173, air cylinder; 174, rigid part; 175, flexible part; 176, centrifugal tube. DETAILED DESCRIPTION

[0037] Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative labor belong to the range of protection of the utility model.

[0038] Embodiment: as shown in the figure, the utility model provides a centrifugal tube vertical reciprocating oscillation device technical scheme: Figure 1 Figure 5

[0039] As shown in the figure, Figure 1 , Figure 2 and Figure 4 ​​As shown, the oscillation device includes a base plate 1, a foot column 2, a motor mounting plate 3, a drive motor 4, a driving wheel 5, a vertical plate 6, an L-shaped corner code 7, a linear guide rail 8, a sliding block 9, a limiting part 10, a bearing seat 11, a bearing 12, a rotating shaft 13, a driven wheel 14, an eccentric block 15, a reciprocating module 16, an oscillation module 17 and a damping part 18, the foot column 2 is fixedly connected with the base plate 1, the foot column 2 is located at the lower end of the four corners of the base plate 1, the motor mounting plate 3 is fixedly connected with the damping part 18, the damping part 18 is fixedly connected with the base plate 1, the damping part 18 is located between the motor mounting plate 3 and the base plate 1, the drive motor 4 is fixedly connected with the motor mounting plate 3, the output shaft of the drive motor 4 is fixedly connected with the driving wheel 5, one of the right angles of the L-shaped corner code 7 is fixedly connected with the base plate 1, the other of the right angles of the L-shaped corner code 7 is fixedly connected with the vertical plate 6, the vertical plate 6 is arranged on one side of the driving wheel 5 on the base plate 1, the vertical plate 6 is fixedly connected with the base plate 1, the linear guide rail 8 is fixedly connected with the vertical plate 6, the linear guide rail 8 is vertically arranged on one side of the vertical plate 6 facing the driving wheel 5, the limiting part 10 is fixedly connected with the vertical plate 6, the limiting part 10 is located at both ends of the linear guide rail 8, the bearing seat 11 is fixedly connected with the vertical plate 6, the central axis of the bearing seat 11 is parallel to the central axis of the driving wheel 5, the bearing 12 is arranged in the bearing seat 11, the outer ring of the bearing 12 is fixedly connected with the bearing seat 11, the rotating shaft 13 passes through the bearing 12, the driven wheel 14 and the eccentric block 15 in sequence, the rotating shaft 13 is fixedly connected with the bearing 12, the driven wheel 14 and the eccentric block 15, the driven wheel 14 and the driving wheel 5 are drivingly connected through a belt 20, the reciprocating module 16 is fixedly connected with the eccentric block 15, the reciprocating module 16 is fixedly connected with the sliding block 9, the sliding block 9 is slidingly connected with the linear guide rail 8, and the reciprocating module 16 is fixedly connected with the oscillation module 17.

[0040] When the oscillation device works, the drive motor 4 is started to drive the driving wheel 5 to start rotating, the driving wheel 5 drives the driven wheel 14 to rotate synchronously through the belt, the driven wheel 14 is fixedly connected with the rotating shaft 13, the rotating shaft 13 rotates with the driven wheel 14, the eccentric block 15 rotates, the eccentric block 15 drives the reciprocating module 16 to move vertically up and down due to the fixed connection between the reciprocating module 16 and the sliding block 9, the oscillation module 17 is vertically reciprocated, the foot column 2, the limiting part 10 and the damping part 18 in the oscillation device are all rubber parts, the parts made of rubber are used to absorb the oscillation and avoid noise, the limiting part 10 also plays a role in avoiding the sliding block 9 from exceeding the stroke and improving the safety of the oscillation device.

[0041] As shown in the drawings, Figure 4As shown, the threaded holes are provided at both ends of the rotating shaft 13, the rotating shaft 13 is provided with a shaft shoulder 131 and a slot, the slot of the rotating shaft 13 is provided with a flat key 132, one end face of the shaft shoulder 131 abuts against the driven wheel 14, the other end face of the shaft shoulder 131 abuts against the bearing 12, the threaded holes of both ends of the rotating shaft 13 are respectively screwed with a screw 133, one end face of one of the screws 133 abuts against the eccentric block 15, and the other screw 133 abuts against the bearing 12.

[0042] The threaded hole at one end of the rotating shaft 13 is screwed with the screw 133, one end face of the screw 133 cooperates with one end face of the shaft shoulder 131 to clamp and fix the bearing 12, the threaded hole at the other end of the rotating shaft 13 is screwed with the other screw 133, one end face of the screw 133 cooperates with the other end face of the shaft shoulder 131 to clamp and fix the driven wheel 14 and the eccentric block 15, thereby completing the axial positioning of the rotating shaft 13, the driven wheel 14 and the eccentric block 15.

[0043] As shown in Figure 4 , the driven wheel 14 is provided with a through slot, and the flat key 132 passes through the through slot of the driven wheel 14.

[0044] The flat key 132 passes through the slot of the rotating shaft 13 and the through slot of the driven wheel 14, thereby completing the circumferential positioning of the driven wheel 14 and the rotating shaft 13.

[0045] As shown in Figure 4 , the eccentric block 15 is provided with a through slot, and the flat key 132 passes through the through slot of the eccentric block 15.

[0046] The flat key 132 sequentially passes through the slot of the rotating shaft 13, the through slot of the driven wheel 14 and the through slot of the eccentric block 15, thereby completing the circumferential positioning of the driven wheel 14, the rotating shaft 13 and the eccentric block 15.

[0047] As shown in Figure 2 , Figure 3 and Figure 5As shown, the reciprocating module 16 includes a drive shaft 161, a roller 162, a reciprocating plate 163, an oil baffle 164, a sealing part 165 and an L-shaped connecting seat 166. One end of the drive shaft 161 is fixedly connected with the eccentric block 15, and the other end of the drive shaft 161 is connected with the roller 162. The reciprocating plate 163 is provided with a channel, and both sides of the channel of the reciprocating plate 163 are provided with sealing grooves. The sealing part 165 is arranged in the sealing grooves. The oil baffle 164 is arranged on both sides of the reciprocating plate 163, and the oil baffle 164 is fixedly connected with the reciprocating plate 163. The oil baffle 164 blocks the channel and the sealing grooves on the reciprocating plate 163, and presses the sealing part 165. The oil baffle 164 close to the driven wheel 14 is provided with a fine groove, and the drive shaft 161 passes through the fine groove on the oil baffle 164. The roller 162 is arranged in the channel on the reciprocating plate 163. One straight angle of the L-shaped connecting seat 166 is fixedly connected with the reciprocating plate 163, and the other straight angle of the L-shaped connecting seat 166 is fixedly connected with the oscillation module 17.

[0048] The channel of the reciprocating plate 163 is filled with lubricating oil. The reciprocating plate 163 cooperates with the oil baffles 164 on both sides to block the channel on the reciprocating plate 163, and at the same time, the sealing part 165 is pressed tightly to prevent the leakage of lubricating oil. The fine groove on the oil baffle 164 is not enough to let the lubricating oil flow out. When the eccentric block 15 rotates, the drive shaft 161 moves. The drive shaft 161 drives the roller 162 to move in the channel on the reciprocating plate 163. When the roller 162 moves, the reciprocating plate 163 is driven to move. Since the reciprocating plate 163 is fixedly connected with the sliding block 9, it has only vertical freedom. The reciprocating plate 163 moves vertically up and down on the linear guide rail 8 along with the sliding block 9, thereby oscillating the oscillation device. The L-shaped connecting seat 166 is provided with a wiring groove, which facilitates the combing of the wire and prevents the wire from interfering with the oscillation process.

[0049] As shown in Figure 2 The roller 162 is wrapped with a nylon part 167.

[0050] Nylon has good self-lubricating property and low friction coefficient, which enables the roller 162 to move smoothly in the channel of the reciprocating plate 163, and makes the oscillation device run more smoothly as a whole.

[0051] As shown in Figure 1 and Figure 3As shown, the oscillation module 17 includes an oscillation base 171, an oscillation cup 172, a cylinder 173, a rigid part 174, a flexible part 175, and a centrifugal tube 176. The oscillation base 171 is fixedly connected with one of the right-angle sides of the L-shaped connecting seat 166. The oscillation cup 172 is fixedly connected with the oscillation base 171. The oscillation base 171 is fixedly connected with the cylinder 173. The cylinder 173 penetrates through the oscillation cup 172. The output end of the cylinder 173 is fixedly connected with the rigid part 174. The oscillation cup 172 is provided with a circular hole. The flexible part 175 is embedded in the circular hole of the oscillation cup 172. The centrifugal tube 176 is placed in the flexible part 175.

[0052] When the oscillation device is ready for oscillation, the centrifugal tube 176 is placed in the flexible part 175. The cylinder 173 is started. The cylinder 173 pushes the rigid part 174. The flexible part 175 clamps and fixes the centrifugal tube 176. The flexible part 175 is made of flexible polyurethane. In the oscillation process, the flexible part 175 plays a role of shock absorption and buffering. The flexible part 175 protects the centrifugal tube 176 and prevents the centrifugal tube 176 from being broken and causing loss.

[0053] The oscillation cup 172 is made of plastic.

[0054] The plastic material is relatively light, which greatly reduces the load of the driving motor 4.

[0055] The driving motor 4 is a stepping motor.

[0056] Using the stepping motor as the driving element avoids the low service life problem caused by the brush motor.

[0057] The reciprocating plate 163 is made of plastic.

[0058] The plastic material is relatively light, which greatly reduces the load of the driving motor 4.

[0059] The utility model discloses a working principle: when the oscillation device prepares to oscillate, places centrifugal tube 176 in flexible part 175, starts cylinder 173, and cylinder 173 promotes rigid part 174, and cooperation flexible part 175 clamps and fixes centrifugal tube 176, and flexible part 175 is flexible polyurethane material, plays the role of shock absorption in the oscillation process, protects centrifugal tube 176, prevents centrifugal tube 176 from breaking, starts drive motor 4, and drive motor 4 starts, drives driving wheel 5 to start rotating, and driving wheel 5 drives driven wheel 14 synchronous rotation through belt 20, and driven wheel 14 and rotating shaft 13 fixed connection, and rotating shaft 13 rotates along with driven wheel 14, and eccentric block 15 rotates, and eccentric block 15 drives the movement of drive shaft 161 when rotating, and drive shaft 161 drives the movement of gyro wheel 162 in the groove of reciprocating plate 163, and gyro wheel 162 drives reciprocating plate 163 when moving, because reciprocating plate 163 and slider 9 fixed connection, only vertical degree of freedom, and limiting part 10 limits the stroke of slider 9, and reciprocating plate 163 moves along with slider 9 on linear guide 8 and carries out vertical movement, realizes the vertical reciprocating oscillation of centrifugal tube 176.

[0060] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have described, and do not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical features. Any modification, equivalent replacement, improvement etc. that is made in the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A centrifuge tube vertical reciprocating shaking device, characterized by: The oscillation device comprises a base plate (1), a foot column (2), a motor mounting plate (3), a driving motor (4), a driving wheel (5), a vertical plate (6), an L-shaped corner code (7), a linear guide rail (8), a sliding block (9), a limiting part (10), a bearing seat (11), a bearing (12), a rotating shaft (13), a driven wheel (14), an eccentric block (15), a reciprocating module (16), an oscillation module (17) and a damping part (18), the foot column (2) is fixedly connected with the base plate (1), the foot column (2) is located at the lower end of the four corners of the base plate (1), the motor mounting plate (3) is fixedly connected with the damping part (18), the damping part (18) is fixedly connected with the base plate (1), the damping part (18) is located between the motor mounting plate (3) and the base plate (1), the driving motor (4) is fixedly connected with the motor mounting plate (3), the output shaft of the driving motor (4) is fixedly connected with the driving wheel (5), one right angle side of the L-shaped corner code (7) is fixedly connected with the base plate (1), the other right angle side of the L-shaped corner code (7) is fixedly connected with the vertical plate (6), the vertical plate (6) is arranged on one side of the driving wheel (5) on the base plate (1), the vertical plate (6) is fixedly connected with the base plate (1), the linear guide rail (8) is fixedly connected with the vertical plate (6), the linear guide rail (8) is vertically arranged on one side of the vertical plate (6) facing the driving wheel (5), the limiting part (10) is fixedly connected with the vertical plate (6), the limiting part (10) is located at both ends of the linear guide rail (8), the bearing seat (11) is fixedly connected with the vertical plate (6), the central axis of the bearing seat (11) is parallel to the central axis of the driving wheel (5), the bearing (12) is arranged in the bearing seat (11), the outer ring of the bearing (12) is fixedly connected with the bearing seat (11), the rotating shaft (13) passes through the bearing (12), the driven wheel (14) and the eccentric block (15) in sequence, the rotating shaft (13) is fixedly connected with the bearing (12), the driven wheel (14) and the eccentric block (15), the driven wheel (14) and the driving wheel (5) are drivingly connected through a belt (20), the reciprocating module (16) is fixedly connected with the eccentric block (15), the reciprocating module (16) is fixedly connected with the sliding block (9), the sliding block (9) is slidingly connected with the linear guide rail (8), and the reciprocating module (16) is fixedly connected with the oscillation module (17).

2. A device for vertically reciprocating a centrifuge tube according to claim 1, wherein: Threaded holes are arranged at both ends of the rotating shaft (13), a shaft shoulder (131) and a groove are arranged on the rotating shaft (13), a flat key (132) is arranged in the groove on the rotating shaft (13), one end face of the shaft shoulder (131) abuts against the driven wheel (14), the other end face of the shaft shoulder (131) abuts against the bearing (12), the two ends of the rotating shaft (13) are respectively threadedly connected with a screw (133), one end face of one screw (133) abuts against the eccentric block (15), and the other screw (133) abuts against the bearing (12).

3. A device for vertically reciprocating a centrifuge tube according to claim 2, wherein: The driven wheel (14) is provided with a through slot, and the flat key (132) passes through the through slot on the driven wheel (14).

4. A device for vertically reciprocating a centrifuge tube according to claim 3, wherein: The eccentric block (15) is provided with a through slot, and the flat key (132) passes through the through slot on the eccentric block (15).

5. A device for vertically reciprocating a centrifuge tube according to claim 4, wherein: The reciprocating module (16) comprises a driving shaft (161), a roller (162), a reciprocating plate (163), an oil baffle (164), a sealing part (165) and an L-shaped connecting seat (166), one end of the driving shaft (161) is fixedly connected with the eccentric block (15), the other end of the driving shaft (161) is connected with the roller (162), the reciprocating plate (163) is provided with a groove, both sides of the groove on the reciprocating plate (163) are provided with sealing grooves, the sealing part (165) is arranged in the sealing grooves, the oil baffles (164) are arranged on both sides of the reciprocating plate (163), the oil baffles (164) are fixedly connected with the reciprocating plate (163), the oil baffles (164) block the groove and the sealing grooves on the reciprocating plate (163), the oil baffles (164) press the sealing part (165), the oil baffle (164) close to the driven wheel (14) side is provided with a fine groove, the driving shaft (161) passes through the fine groove on the oil baffle (164), the roller (162) is arranged in the groove on the reciprocating plate (163), one straight angle of the L-shaped connecting seat (166) is fixedly connected with the reciprocating plate (163), and the other straight angle of the L-shaped connecting seat (166) is fixedly connected with the oscillation module (17).

6. A device for vertically reciprocating a centrifuge tube according to claim 5, wherein: The roller (162) is wrapped with a nylon part (167).

7. A device for vertically reciprocating a centrifuge tube according to claim 6, wherein: The oscillation module (17) comprises an oscillation base (171), an oscillation cup (172), a gas cylinder (173), a rigid part (174), a flexible part (175) and a centrifugal tube (176), the oscillation base (171) is fixedly connected with one straight angle of the L-shaped connecting seat (166), the oscillation cup (172) is fixedly connected with the oscillation base (171), the oscillation base (171) is fixedly connected with the gas cylinder (173), the gas cylinder (173) passes through the oscillation cup (172), the output end of the gas cylinder (173) is fixedly connected with the rigid part (174), the oscillation cup (172) is provided with a circular hole, the flexible part (175) is embedded in the circular hole on the oscillation cup (172), and the centrifugal tube (176) is placed in the flexible part (175).

8. A device for vertically reciprocating a centrifuge tube according to claim 7, wherein: The oscillation cup (172) is made of plastic.

9. The vertical reciprocating centrifuge tube agitator of claim 1, wherein: The driving motor (4) is a stepping motor.

10. The vertical reciprocating centrifuge tube agitator of claim 5, wherein: The reciprocating plate (163) is made of plastic.

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