Flexible clutch device driven by double motors

Abstract

The utility model discloses a dual-motor-driven flexible clutch device, which comprises a main motor, a closed-loop stepping motor and a clutch, and an output shaft of the main motor is connected with an output shaft of the closed-loop stepping motor through the clutch. Compared with the prior art, the utility model has the beneficial effects that the output shaft of the main motor is connected with the output shaft of the closed-loop stepping motor through the clutch; when the main motor rotates, the clutch is not closed, and the main motor and the closed-loop stepping motor are not linked. When the main motor rotating at a high speed stops, the clutch is closed, the main motor is linked with the closed-loop stepping motor, the closed-loop stepping motor drives the main motor to rotate to a preset position, angle and phase through the clutch, and the purpose of indexing positioning is achieved. The main motor can be a high-rotating-speed high-frequency alternating-current motor instead of a low-rotating-speed servo motor in the prior art, so that a higher rotating speed is achieved.

Description

Technical Field

[0001] The utility model relates to a dual-motor driving device, in particular to a graduation positioning structure thereof. Background Art

[0002] Centrifuges are mainly used for sample centrifugation in automated workstations. In the past, they were directly driven by servo motors. Due to the inertia limitation of the motor, the speed was difficult to increase and could not meet the high speed requirements. In addition, it has no indexing and positioning function, and cannot accurately control the rotation to a specified position, fixed-point parking or phase recovery. Therefore, how to improve the existing centrifuge drive device to achieve speed increase and indexing and positioning functions is a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a dual-motor driven flexible clutch device.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a dual-motor driven flexible clutch device, including a main motor, a closed-loop stepper motor and a clutch, wherein the output shaft of the main motor is connected to the output shaft of the closed-loop stepper motor through the clutch.

[0005] The utility model is further configured as follows: the clutch comprises an upper suction cup and a lower suction cup used in conjunction with each other, the output shaft of the main motor is fixedly connected to the upper suction cup through a connecting piece, and the output shaft of the closed-loop stepper motor is connected to the lower suction cup.

[0006] The utility model is further configured as follows: the clutch further comprises a first conductive ring and a second conductive ring, the first conductive ring is connected around the upper suction cup, and the second conductive ring is connected around the lower suction cup.

[0007] The utility model is further configured as follows: the closed-loop stepping motor is replaced by a graduation positioning mechanism, and the graduation positioning mechanism is connected to the output shaft of the main motor through a clutch.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the output shaft of the main motor is connected to the output shaft of the closed-loop stepper motor through a clutch. When the main motor rotates, the clutch is not closed, and the main motor and the closed-loop stepper motor are not linked. When the high-speed rotating main motor stops, the clutch is closed, and the main motor and the closed-loop stepper motor are linked. The closed-loop stepper motor drives the main motor to rotate to a predetermined position, angle and phase through the clutch, so as to achieve the purpose of indexing and positioning. The main motor can be a high-speed high-frequency AC motor, which replaces the low-speed servo motor in the prior art to achieve a higher speed.

[0009] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of a dual-motor driven flexible clutch device shown in a preferred embodiment of the utility model.

[0011] In the figure: 1. main motor; 2. connecting part; 3. first conductive ring; 4. upper suction cup; 5. second conductive ring; 6. upper connecting block; 8. lower suction cup; 10. lower connecting block; 11. closed-loop stepping motor. DETAILED DESCRIPTION

[0012] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0013] See attached Figure 1 As shown, a dual-motor driven flexible clutch device in this embodiment includes a main motor 1, a closed-loop stepper motor 11 and a clutch, and the output shaft of the main motor 1 is connected to the output shaft of the closed-loop stepper motor 11 through the clutch.

[0014] The output shaft of the main motor 1 is connected to the output shaft of the closed-loop stepper motor 11 through a clutch. When the main motor 1 rotates, the clutch is not closed, and the main motor 1 and the closed-loop stepper motor 11 are not linked. When the high-speed rotating main motor 1 stops, the clutch is closed, and the main motor 1 and the closed-loop stepper motor 11 are linked. The closed-loop stepper motor 11 drives the main motor 1 to rotate to a predetermined position, angle and phase through the clutch to achieve the purpose of indexing and positioning. The main motor 1 can be a high-speed high-frequency AC motor, which replaces the low-speed servo motor in the prior art to achieve a higher speed.

[0015] The clutch comprises an upper suction cup 4 and a lower suction cup 8, and a first conductive ring and a second conductive ring 5; the output shaft of the main motor 1 is fixedly connected to the upper suction cup 4 through a connector 32, and the output shaft of the closed-loop stepper motor 11 is connected to the lower suction cup 8. The first conductive ring is connected around the upper suction cup 4, and the second conductive ring 5 is connected around the lower suction cup 8. The first conductive ring and the second conductive ring 5 in the energized state attract or repel each other, driving the upper suction cup 4 and the lower suction cup 8 to close or separate from each other. The closed upper suction cup 4 and the lower suction cup 8 move together by friction, and the separated upper suction cup 4 and the lower suction cup 8 move independently.

[0016] The utility model is further configured as follows: an upper connecting block 6 is provided in the middle of the lower suction cup 8, a lower connecting block 10 is provided on the output shaft of the closed-loop stepping motor 11, and the upper connecting block 6 and the lower connecting block 10 are connected.

[0017] The utility model is further configured as follows: the closed-loop stepping motor 11 is replaced by a graduation positioning mechanism, and the graduation positioning mechanism is connected to the output shaft of the main motor 1 through a clutch.

[0018] In summary, the method of using the dual-motor driven flexible clutch device shown in the utility model is: start the main motor 1, the upper conductive ring and the lower conductive ring repel each other, the upper suction cup 4 and the lower suction cup 8 are not closed, and the main motor 1 and the closed-loop stepper motor 11 are not linked. When the high-speed rotating main motor 1 stops, the upper conductive ring and the lower conductive ring attract each other, the upper suction cup 4 and the lower suction cup 8 close and move together, the main motor 1 and the closed-loop stepper motor 11 are linked, and the closed-loop stepper motor 11 drives the main motor 1 to rotate to a predetermined position, angle and phase through the clutch to achieve the purpose of indexing positioning.

[0019] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-motor driven flexible clutch device, comprising a main motor (1), a closed-loop stepping motor (11) and a clutch, characterized in that: The output shaft of the main motor (1) is connected to the output shaft of the closed-loop stepping motor (11) through a clutch; the clutch comprises an upper suction cup (4) and a lower suction cup (8) used in conjunction with each other, the output shaft of the main motor (1) is fixedly connected to the upper suction cup (4) through a connecting piece (2), and the output shaft of the closed-loop stepping motor (11) is connected to the lower suction cup (8); the clutch also comprises a first conductive ring (3) and a second conductive ring (5), the first conductive ring (3) is connected around the upper suction cup (4), and the second conductive ring (5) is connected around the lower suction cup (8).

2. The dual-motor driven flexible clutch device according to claim 1, characterized in that: The closed-loop stepping motor (11) is replaced by a graduation positioning mechanism, and the graduation positioning mechanism is connected to the output shaft of the main motor (1) via a clutch.

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