CN203098636U

CN203098636U - Magneto-rheological clutch

Info

Publication number: CN203098636U
Application number: CN 201220685939
Authority: CN
Inventors: 宋伟志; 席加豪; 赵艳青; 王世玉; 赵玉河
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2012-12-12
Filing date: 2012-12-12
Publication date: 2013-07-31
Anticipated expiration: 2022-12-12

Abstract

The utility model discloses a magneto-rheological clutch, which comprises a drive part, a driven part, a shell and a bearing, wherein the drive part and the driven part are respectively assembled on the shell through the bearing, the drive part is arranged on a drive disc, the driven part is arranged on a driven disc, magneto-rheological liquid is arranged between the drive dick and the driven disc, magnet exciting coils are arranged on the two ends of the drive disc and the driven disc, permanent magnets are arranged on the shell which is arranged on the two sides of the magnet exciting coils, and the magnetic field direction of the permanent magnets are reverse to the magnetic field direction of the magnet exciting coils. The magneto-rheological clutch is in a normally-combined state when not adding current, produces a reversing field by adding the current to reduce the field of the permanent magnets, and enables the drive part and the driven part to be in a separated state. The magneto-rheological clutch uses a power supply just when shifting or contracting, thereby saving energy sources, and also reducing failure frequency because of being not used frequently.

Description

A kind of magnetic rheological clutch

Technical field

The utility model belongs to the auto parts and components field, is specifically related to a kind of clutch.

Background technique

Magnetic flow liquid is as the Novel Intelligent fluid, its yield stress and viscosity change with externally-applied magnetic field, the magnetorheological device that is designed to based on this mechanical characteristic has series of advantages such as fast, the simple in structure and energy consumption of speed of response is low, is with a wide range of applications in industrial quarters.Before this, all be to utilize electric current to produce magnetic field about a lot of designs based on magnetic rheological clutch, the state of controlling magnetic flow liquid by the change in magnetic field changes, and changes the yield stress of magnetic flow liquid with this, realizes the moment of torsion transmission of driving link and Passive part.Yet well-known, clutch is a kind of instrument that is in long-term bonding state, has only the gear shift of needs and just can make when moving back grade initiatively that original paper and passive original paper break away from, therefore need to continue steady current in the said structure and keep required magnetic field, so not only waste energy, and be easy to break down.

Summary of the invention

At the deficiency that prior art exists, the purpose of this utility model is, a kind of clutch that combines with permanent magnet based on magnetic flow liquid is provided.

In order to realize above-mentioned task, the utility model adopts following technological scheme to be achieved:

A kind of magnetic rheological clutch, comprise driving link, Passive part, housing and bearing, driving link and Passive part are assemblied on the housing by bearing respectively, driving disc is installed on the driving link, driven disc is installed on the Passive part, between driving disc and the driven disc magnetic flow liquid is housed, the two ends of driving disc and driven disc are equipped with field coil, on the housing of the both sides of field coil permanent magnet is installed, the magnetic direction of permanent magnet is opposite with the magnetic direction of field coil.

The utility model is not when adding electric current, and clutch is in normal bonding state, gives birth to the field weakening that the opposing magnetic field makes permanent magnet by powering up miscarriage, just makes driving link and Passive part be in separated state.The utility model only uses power supply in gear shift or when moving back grade, energy saving so not only owing to use not frequently, has also reduced the frequency that fault occurs.

Description of drawings

Fig. 1 is an overall structure schematic representation of the present utility model.

Fig. 2 is the utility model internal structure enlarged diagram.

The implication of each label is among the figure: 1-driving link, 2-driving disc, 3-Passive part, 4-driven disc, 5-magnetic flow liquid, 6-housing, 7-bearing, 8-field coil, 9-permanent magnet.

Below in conjunction with drawings and Examples particular content of the present utility model is done explanation in further detail.

Embodiment

Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.

Defer to technique scheme, as depicted in figs. 1 and 2, a kind of magnetic rheological clutch, comprise driving link 1, Passive part 3, housing 6 and bearing 7, driving link 1 and Passive part 3 are assemblied on the housing 6 by bearing 7 respectively, driving disc 2 is installed on the driving link 1, driven disc 4 is installed on the Passive part 3, between driving disc 2 and the driven disc 4 magnetic flow liquid 5 is housed, the two ends of driving disc 2 and driven disc 4 are equipped with field coil 8, on the housing 6 of the both sides of field coil 8 permanent magnet 9 is installed, the magnetic direction of permanent magnet 9 is opposite with the magnetic direction of field coil 8.

Magnetic flow liquid 5 is a controlled fluid, is by high magnetic permeability, the small soft magnetic particles of low magnetic hysteresis and the suspension that non-magnetic liquid mixes.This suspension presents low viscous Newtonian fluid characteristic under zero magnetic field condition; And under strong magnetic field action, then present the Bingham fluid characteristic of high viscosity, lazy flow, and along with the enhancing of electric current, magnetic field is strengthened, and the shear yield strength of its fluid is big more, is applied to controllable clutch with this characteristic.Because being shear yield strength and the magnetic intensity after moment, reversible and its rheology, the rheology of magnetic flow liquid under the action of a magnetic field have stable corresponding relation.

Common clutch with magnetic rheologic liquid, be the separation of controlling driving link 1 and Passive part 3 by energising in the field coil 8 or outage and be connected, current value by field coil 8 changes the cross shear that size changes magnetic flow liquid 5, just can adjust the torque that is delivered to Passive part 3 from driving link 1.When producing magnetic field at once around the field coil 8 during perfectly straight stream electric current in the field coil 8, the shearing stress of the magnetic flow liquid 5 under the effect in magnetic field in the middle of driving disc 2 and driven disc 4 is greater than yield stress, magnetic flow liquid 5 becomes solid-state driving disc 2 and driven disc 4 are linked together from fluid and rotates with identical speed, and driving link 1 Passive part 3 enters bonding state.When the direct current (d.c.) in the cut-out field coil 8, magnetic field around the field coil 8 disappears at once, from the solid-state liquid that becomes low-viscosity, driving disc 2 can't be with driven disc 4 rotations to the shearing stress of magnetic flow liquid 5 less than yield stress, reaches the separated state of Passive part 3 and driving link 1.

Yet clutch is a kind of device that is in bonding state for a long time, and therefore common magnetic rheological clutch needs continued power to make clutch be in bonding state, so not only wastes resource, and is easy to break down.Magnetic rheological clutch of the present utility model has added permanent magnet 9 on original structure, it is solid-state to utilize the magnetic field of permanent magnet 9 to make that magnetic flow liquid 5 is become by liquid state, and driving disc 2 and driven disc 4 are consolidated, and realize bonding state between driving link 1 and the Passive part 3.When the needs gear shift or when moving back grade, only need to add direct current (d.c.) for field coil 8, make the magnetic field of the original permanent magnet 9 of magnetic field cancellation that field coil 8 produces, make magnetic flow liquid 5 from the solid-state liquid state that becomes, driving disc 2 and driven disc 4 break away from, driving link 1 and Passive part 3 are in separated state, realize gear shift or move back the shelves action; Gear shift or move back shelves finish after, field coil 8 dead electricity, driving disc 2 and driven disc 4 are fixed by magnetic flow liquid 5 under the action of a magnetic field of permanent magnet 9 again, return to bonding state again between driving link 1 and the Passive part 3.Only use power supply in gear shift or when moving back grade, energy saving so not only owing to use not frequently, has also reduced the frequency that fault occurs.

Claims

1. magnetic rheological clutch, comprise driving link (1), Passive part (3), housing (6) and bearing (7), driving link (1) and Passive part (3) are assemblied on the housing (6) by bearing (7) respectively, driving disc (2) is installed on the driving link (1), driven disc (4) is installed on the Passive part (3), it is characterized in that, between driving disc (2) and the driven disc (4) magnetic flow liquid (5) is housed, the two ends of driving disc (2) and driven disc (4) are equipped with field coil (8), on the housing (6) of the both sides of field coil (8) permanent magnet (9) is installed, the magnetic direction of permanent magnet (9) is opposite with the magnetic direction of field coil (8).