Patent ID: 12228189

DETAILED DESCRIPTION

FIG.1is a schematic structural diagram according to the present disclosure;FIG.2is a schematic structural diagram of a magnetorheological fluid adjustment mechanism, viewed from an end thereof, according to the present disclosure;FIG.3is a schematic structural diagram along A-A ofFIG.2according to the present disclosure;FIG.4shows one-way flow valve assembly according to the present disclosure;FIG.5is a side view of a cross-shaped mounting seat according to the present disclosure;FIG.6is a top view of the cross-shaped mounting seat according to the present disclosure;FIG.7is a schematic cross-sectional view of a spring blocking plate according to the present disclosure; andFIG.8is a schematic diagram of a second structure of a second channel according to the present disclosure. As shown in the above Figs., a self-sensing and separated dual-cylinder magnetorheological damper includes a first piston cylinder and a second piston cylinder which are arranged angularly and in communication with each other. The first piston cylinder includes a piston inner cylinder2and a piston outer cylinder3which are coaxially provided. The piston inner cylinder2, the piston outer cylinder3and the second piston cylinder are formed with a magnetorheological fluid circulation channel capable of circulating a magnetorheological fluid. The piston inner cylinder2is provided with a piston rod assembly1capable of reciprocating in an axial direction of the piston inner cylinder, and when the piston rod assembly1is compressed and restored, the magnetorheological liquid correspondingly forms a first circulation loop and a second circulation loop respectively. The second piston cylinder is provided therein with a magnetorheological liquid adjustment mechanism for forming the first circulation loop and the second circulation loop. As shown inFIG.1, a sealing oil seal and a guide ring are provided at a top end of the piston inner cylinder2and are used for enhancing sealing performance of the piston inner cylinder2and achieving a guide function for the piston rod assembly1. Optionally the end of the piston inner cylinder2can also be sealed by means of a sealing cover. Independent control of damping force values in compression and restoration working conditions can be achieved by means of different circulation channels of the magnetorheological liquid. Furthermore, the device can detect vibration amplitudes and speeds of the working conditions by means of a design of self-sensing LVDT structure away from magnetorheological coils, so as to provide a basis for adjusting the damping force of the damper, and by means of detecting the vibration amplitudes of the working conditions, a simple control algorithm is designed to control the damper to improve the riding comfort.

In this embodiment, the magnetorheological fluid adjustment mechanism includes a magnetic isolation sleeve21fixedly disposed in a middle of the second piston cylinder, a first channel22disposed in the magnetic isolation sleeve21, a second channel23disposed in the magnetic isolation sleeve21, a third channel24disposed in the magnetic isolation sleeve21and a fourth channel25in the magnetic isolation sleeve21. The first channel22and the second channel23are symmetrically arranged with respect to an axis of the magnetic isolation sleeve23. The third channel24and the fourth channel25are arranged symmetrically with respect to the axis of the magnetic isolation sleeve. An accommodation cavity29is formed between a bottom end of the magnetic isolation sleeve (the bottom end of the magnetic isolation sleeve is a lower end in a vertical direction inFIG.1) and a bottom end of the second piston cylinder. A first guiding cavity28is formed between a top end of the magnetic isolation sleeve21and the piston inner cylinder2, and a second guiding cavity30is formed between a top end of the magnetic isolation sleeve21and the piston outer cylinder3, the first guiding cavity28and the second guiding cavity30are communicated with each other. One end of the first channel22is communicated with the first guiding cavity28, and the other end of the first channel22is communicated with the accommodation cavity29. Upper ends of the second channel23, the third channel24and the fourth channel25are communicated with the second guiding cavity30. Lower ends of the second channel23, the third channel24and the fourth channel25are communicated with the accommodation cavity29. The magnetic isolation sleeve21has a cylindrical structure, and four channels are arranged inside the magnetic isolation sleeve21. Two ends of the first channel22are communicated to the first guiding cavity28and the accommodation cavity29respectively. When the piston rod assembly1is compressed and restored, the magnetorheological fluid selects different channels for circulating flow.

In this embodiment, a third piston cylinder10is arranged in the first channel22, a third piston11is fixedly arranged in the third piston cylinder10, and third magnetic induction coils are evenly wound around the third piston11along a circumferential direction. A third annular channel for flow of magnetorheological fluid is formed between the third piston11and the third piston cylinder10. The upper end of the first channel22is communicated with the piston inner cylinder2through the first guiding cavity28, and the lower end of the first channel22is communicated with the accommodation cavity29. The same structure is provided inside the second channel23and the first channel22, and a fourth piston cylinder12and a fourth piston13are correspondingly provided inside the second channel23. A fourth annular channel is formed between the fourth piston cylinder12and the fourth piston13, and a fourth magnetic induction coil is also arranged around the fourth piston13along the circumferential direction. Relative to the components in the first channel22, the components inside the second channel23only differ in length and size.

In this embodiment, a mounting groove is provided at the lower end of the third channel24, and a one-way flow valve assembly20for opening or closing the third channel24is arranged in the mounting groove. The structure and arrangement in the third channel24are the same as those in the fourth channel25. The magnetorheological fluid can form different circulation loops through arrangement of the one-way flow valve assembly20.

In this embodiment, the one-way flow valve assembly20includes a cross-shaped mounting seat26fixedly installed in the mounting groove, a spring connected to the cross-shaped mounting seat26, and a spring blocking plate27connected to the spring. An internal structure of the third channel24is the same as that of the fourth channel25. A limit stop rod19is provided at an opening of the mounting groove of the third channel and at an opening of the mounting groove of the fourth channel. The limit stop rod19includes two circular limit rings and a connecting rod connecting the two limit rings. The two limit rings and the connecting rod are formed in one piece, and the limit stop rod19is fixedly arranged on the lower end of the magnetic isolation sleeve21(i.e. the bottom end of the magnetic isolation sleeve21). The cross-shaped mounting seat26is fixedly arranged inside the mounting groove, and the spring is installed between the boss on the cross-shaped mounting seat26and the boss on the spring blocking plate27. A diameter of the spring blocking plate27is larger than that of the limit ring of the limit stop rod19. When the piston rod assembly1is compressed (that is, when the piston rod assembly1moves from left to right), the magnetorheological fluid flows through the piston inner cylinder2, the first guiding cavity28, the third annular channel, the accommodation cavity29, the third channel24and the fourth channel25(at this time, the opening area of the third and fourth channels is 5-10 times the area of the fourth annular channel, due to the throttling effect, the resistance increase, the magnetorheological fluid mainly flows through the third channel and the fourth channel), the second guiding cavity30, the first annular channel between the piston inner cylinder2and the piston outer cylinder3in turn, and finally flows into the piston inner cylinder2. When the piston rod assembly1is restored (i.e. when the piston rod assembly1moves from right to left), the magnetorheological fluid flows through the first annular channel between the piston inner cylinder2and the piston outer cylinder3, the second guiding cavity30, the fourth annular channel (the third and fourth channels are closed due to arrangement of the one-way flow valve assembly20), the accommodation cavity29, the third annular channel, and the first guiding cavity28in turn, and finally flows back into the piston inner cylinder2.

In this embodiment, the magnetorheological fluid adjustment mechanism also includes a mounting base8integrally formed with the second piston cylinder, the piston inner cylinder2and the piston outer cylinder3are fixedly connected and arranged on the mounting base8. The bottom of the mounting base8is also provided with a lifting lug for mounting, thereby facilitating installation of the equipment. The piston inner cylinder2and the piston outer cylinder3are all installed in the mounting base8in a fixed connection manner.

In this embodiment, a reinforcing rib plate is provided between the bottom of the outer piston cylinder3and the end of the second piston cylinder. A compensation cylinder assembly is provided on the reinforcing rib plate for volume compensation when the magnetorheological fluid flows. The compensation cylinder assembly includes a compensation cylinder16, a valve core18disposed at the end of the compensation cylinder16, and a floating piston17disposed in the compensation cylinder13and freely movable along the axial direction of the compensation cylinder13. One end of the reinforcing rib plate is fixedly connected with the bottom end of the piston outer cylinder3, the other end of the reinforcing rib plate is fixedly connected with the end of the second piston cylinder, and the accommodation cavity29is communicated with the compensation cylinder16, and the compensation cylinder assembly conducts volume compensation for magnetorheological fluid so that the equipment run more smoothly.

In this embodiment, the end of the piston inner cylinder2, the bottom of the piston outer cylinder3(i.e. the horizontal right end), and the end of the second piston cylinder are all provided with diversion holes for circulating flow of the magnetorheological fluid, and the bottom end of the piston inner cylinder2is provided with a normal through hole, which enables external characteristic output of the damper to be smoother.

In this embodiment, the piston rod assembly1includes a piston rod, a piston head4fixedly connected to the piston rod, and a sealing ring arranged on the piston head4. An outer wall of the piston inner cylinder2is provided with a primary coil6and a secondary induction coil5. The bottom end of the second piston cylinder is provided with a sealing end cover14. Each magnetic induction coil inside the device is drawn out through the sealing end cover14, and is sealed by the wire sealing structure15, and the wire sealing structure15can adopt existing structures such as an oil seal or a sealing ring, which will not be described here.

In this embodiment, as shown inFIG.8, a permanent magnet31may be added separately to ensure that the magnetorheological damper can also provide shear yield force when no current flows into the damper, thereby improving system stability.

In this embodiment, as shown inFIG.9, a multi-channel ring formed by welding the magnetically conductive material33and the non-magnetically conductive material32can also be added separately. The multi-channel ring is fixedly connected to the third piston11, and is configured to reduce the flow velocity of the magnetorheological fluid of the damper under high-speed impact, and ensure that the output damping force of the magnetorheological damper is stable and gentle, thereby reducing the correlation with the impact speed and improving the controllable range.

In this embodiment, as shown inFIG.10, a permanent magnet31and a multi-channel ring formed by welding the magnetically conductive material33and the non-magnetically conductive material32may be added at the same time.

In this embodiment, the internal arrangement structures of the first channel22and the second channel23may be the same or different, and both can adopt the above different arrangements to improve the performance of the products so as to meet usage requirements.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or replaced equivalently, without departing from the spirit and scope of the technical solutions of the present disclosure, the modifications or the equivalent replacements should be included in the scope of the claims of the present disclosure.