CN2492973Y - Double-disc electric rheologic transmission mechanism - Google Patents

Abstract

The utility model provides a double-disc electromechanical liquid transmission mechanism which has rotary shearing functions of opposite directions simultaneously and has unchanged shearing rate of electric rheological liquid, which belongs to an electric rheological transmission mechanism. The utility model is characterized in that the mechanism is composed of three concentric discs of a left disc 14, a right disc 15, a middle disc 16, etc. The same motor and the same gear wheel reversing device are used, and the left and the right discs 14 and 15 are rotated in the opposite directions by a left synchronous belt 2 and a left synchronous belt wheel 3, and a right synchronous belt 20 and a right synchronous belt wheel 19. The mechanism can be used as an electro-hydraulic servo device with high performance, a shaft coupling, etc. The utility model improves the dynamic quality of a system.

Description

Double disc type electrorheological transmission mechanism

The utility model belongs to an electromechanical hydraulic transmission mechanism. It has the characteristics of quick response and no special interface between the electronic control part and the mechanical power output part. It can be used as a high-performance electro-hydraulic servo control device, electro-rheological clutch, coupling, brake, damper, etc.

The existing disc-type electrorheological transmission device only provides the electrorheological fluid with a single direction of rotation and shearing action, so it can only adapt to the load with the same direction of motion. In addition, the shear rate of the electrorheological fluid is related to the working conditions, so under the same applied electric field, the torque transmitted by the mechanism is related to the rotation speed.

A patent WO 99/58873 retrieved, introduces an electrorheological damper, which uses a set of disk arrays in structure, but the active disk array can only provide shearing action in one direction, while this The structure of the utility model can better adapt to the change of the load.

The purpose of the utility model is to provide a double-disc type electrorheological transmission device capable of rotating and shearing in opposite directions at the same time.

The purpose of the utility model is achieved in that the left disc and the right disc are independent of each other and can form relative motion with the middle disc. Utilizing the gear reversing mechanism and the transmission of the synchronous belt, the left disc and the right disc are rotated at the same time, and the direction is opposite. The overall grounding composed of the middle disc and the left and right mandrels. When the left disc (or right disc) is connected to a high-voltage power supply, the electrorheological fluid between the left disc (or right disc) and the middle disc produces an electrorheological effect. At this time, the left disc (or right disc) The rotational movement of the rotor produces shearing action on the electrorheological fluid, which causes the electrorheological fluid to produce shear deformation, acts on the middle disc, and drives the middle disc to rotate in a forward or reverse direction. Therefore, the magnitude and direction of the torque output of the device on the right spindle can be selected according to specific load conditions. The whole formed by the middle disk 16 and the left and right spindles 5, 18 of the utility model is not only the torque input of the device, but also the torque output of the device.

Due to the adoption of the above scheme, it is only necessary to control the output voltage of the high-voltage power supply and the high-voltage power supply of the left disc or the right disc, so that the mechanism can obtain output torques in different directions and sizes. Compared with the existing electrorheological device transmission The singleness of the utility model has simple control and good adaptability to the load.

Because the experiment of this mechanism has obtained better dynamic performance curve, so the performance of the utility model is excellent.

Below in conjunction with accompanying drawing, the utility model is further described.

Figure 1——The general assembly drawing of the double-disk electrorheological transmission device.

Figure 2——The system response curve under the input of the speed n=60rpm in the constant shear field and the step electric field E=6kV/mm.

Fig. 3——the system response curve under the action of rotational speed n=60rpm, pulse electric field E=6kV/mm, and pulse width t=0.4s in a constant shear field.

figure 1:

1. Left support 2. Left synchronous belt 3. Left synchronous pulley 4. Insulation sleeve

5. Left mandrel 6. Plastic cylinder 7. Flat key 8. Brush outer cylinder

9. Spring 10. Brush holder cover 11. Brush head 12. Plastic sleeve

13. Temperature measuring hole bolt 14. Left disc 15. Right disc 16. Middle disc

17. Right support 18. Right mandrel 19. Right synchronous pulley 20. Right synchronous belt

The utility model provides a double-disk electrorheological transmission device capable of rotating and shearing in opposite directions at the same time, as shown in FIG. 1 . This mechanism is made up of three concentric discs such as left disc 14, right disc 15, middle disc 16. The left disc 14 and the right disc 15 are respectively installed on the left mandrel 5 and the right mandrel 18 of the middle disc 16 through bearings, and the middle disc 16 is connected with the left mandrel 5 and the right mandrel 18 with screws to form a whole , thereby realizing the mutual rotation of the middle disk 16 and the left and right disks 14,15. The left and right discs 14, 15 are connected to the high-voltage power supply control switch, the middle disc 16 is grounded, and the left mandrel 5 and the right mandrel 18 are isolated from the left disc 14 and the right disc 15 with the plastic tube 6 and the plastic cover 12. Electrorheological fluid is injected between the left and right discs 14 , 15 and the middle disc 16 . Using the same motor and gear reversing device, through the left synchronous belt 2 and the left synchronous pulley 3, the right synchronous belt 20 and the right synchronous pulley 19, the left and right discs 14, 15 can be rotated in opposite directions and higher than the operating conditions. rate rotation. When the left and right disks 14, 15 were not connected to the high-voltage power supply, the rotation of the middle disk 16 had nothing to do with the rotation of the left disk 14 and the right disk 15; When the high-voltage power supply is connected, an electric field is generated between the left disk 14 and the middle disk 16, or between the right disk 15 and the middle disk 16, and the electrorheological fluid between the disks produces an electrorheological effect, making it drive the middle disk 16 Generates rotational motion in forward and reverse directions and at a rate higher than that of the working condition. The right mandrel 18 outputs torque through an elastic coupling. The whole device is installed in an insulating shell, because the left disc 14 and the right disc 15 always rotate in opposite directions at the same rate, and in use, their rotational rate is much higher than the input and output rotational speeds, thus in the left disc The shear rate of the electric current variation between the disk 14, the right disk 15 and the middle disk 16 is constant, so that the output torque has nothing to do with the output speed, which is convenient for system control.

According to specific load requirements, an electric field is applied between the left disk 14 and the middle disk 16 (or between the right disk 15 and the middle disk 16) filled with electrorheological fluid, causing the electrorheological effect of the electrorheological fluid, resulting in The rotating shear stress drives the middle disk 16 to rotate. The computer compares the load signal with the input control signal, and constantly changes the magnitude of the electric field or the direction of the rotational shearing action, so that the viscous shearing torque of the electrorheological fluid drives the output torque of the middle disc 16, which can adapt to changes in different loads .

It can be seen from Figure 2 that when the step electric field acts, the middle disc immediately outputs the rotation angle, and the rise time of the output torque detected by the torque sensor of the elastic coupling is 0.05s.

It can be seen from Figure 3 that under the action of the pulsed electric field, the output rotation angle and output torque of the middle disc respond quickly.

Claims (3)

1, a kind of double-disk electric rheological transmission mechanism, form by left support abutment, right support abutment, disk, synchronous belt transmission device, brush, plastic barrel, plastic sheath etc., it is characterized in that: about two disks 14,15 and intermediate disc 16 are concentric discs, left side mandrel 5, right mandrel 18 form a whole with intermediate disc 16, adopt same motor and gear wheel reversing device, be with 2 and left synchronous pulley 3 synchronously by a left side, the right side is with 20 and right synchronous pulley 19 synchronously, and driving left and right sides disk 14,15 can be in the opposite direction and be higher than the speed rotation of operating mode.

2, double-disk electric rheological transmission mechanism according to claim 1 is characterized in that: about two disks 14,15 respectively by Bearing Installation on the left mandrel 5 and right mandrel 18 of intermediate disc 16.

3, double-disk electric rheological transmission mechanism according to claim 1 is characterized in that: left mandrel 5 and right mandrel 18 usefulness plastic barrels 6 and plastic sheath 12 are isolated with left disk 14 and right disk 15.

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