Embedded semi-active eddy current damper

Abstract

The invention discloses an embedded semi-active eddy current shock absorber, which belongs to the technical field of shock absorption, and comprises a support unit for providing support force for a driving rotor unit and a driven rotor unit, the driving rotor unit, an excitation unit and the driven rotor unit. And when the permanent magnet clutch slips, the system can be protected from being impacted, and the impact load on related parts is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of eddy current vibration dampers, and in particular relates to an embedded semi-active eddy current vibration damper. Background Art

[0002] With the rapid development of industrial technology, the new energy vehicle industry has expanded rapidly in recent years, which has put forward higher requirements for its supporting inspection and testing equipment, mainly including core component manufacturing, vehicle and inspection and testing. The shock absorber of new energy vehicles is a key component of the suspension system of new energy vehicles. It can quickly attenuate the vibration transmitted from the road surface to the vehicle body and improve the driving smoothness; it can make the driver and passengers less fatigued and the cargo less damaged, and improve the riding comfort; it can reduce the impact load on related parts, reduce wear and tear, and improve the economic efficiency of use.

[0003] In traditional vehicle shock absorbers, hydraulic or pneumatic systems are usually used to absorb vibration energy, but this method has the disadvantages of large energy consumption and slow response. Eddy current shock absorber is a new type of shock absorber that came into being under this situation. It absorbs and dissipates energy through electromagnetic force, so as to effectively improve the performance of the vehicle's suspension system and ultimately achieve semi-active control of the vehicle. Many shock absorber manufacturers at home and abroad are competing to set up development and research institutions, invest heavily in the development of new products, new processes and new materials, and quickly transform scientific research results into productivity, so that the shock absorber manufacturing industry has formed a large-scale industry in the world. For example, the Chinese utility model patent with publication number CN 214197072 U discloses a rotary eddy current shock absorber with adjustable damping, but it has the disadvantage of a small damping adjustment range. Therefore, it is necessary to design a new eddy current shock absorber suitable for new energy vehicles or other industrial production development trends. Summary of the invention

[0004] In view of this, the present invention provides an embedded semi-active eddy current shock absorber. The embedded semi-active eddy current shock absorber can achieve stepless damping adjustment by adding a permanent magnet clutch in the shock absorber. When overloaded, the permanent magnet clutch slips to protect the system from impact, thereby greatly reducing the impact load on related parts.

[0005] The present invention provides an embedded semi-active eddy current vibration damper adopts the following technical solution:

[0006] An embedded semi-active eddy current damper, comprising:

[0007] Support unit: used to provide support force for the active rotor unit and the driven rotor unit, including a stator, the stator includes an inner ring and an outer ring, the inner ring is supported on the active shaft through a bearing, so that the stator can rotate around its own axis;

[0008] Active rotor unit: includes active shaft, shaft end cover, embedded inner rotor; the middle part of active shaft rotates with the inner ring of stator through bearing, the left end of active shaft extends outward relative to the left end of stator; the right end of active shaft is coaxially connected with embedded inner rotor; the outer wall of embedded inner rotor is fixed with lower magnet; the shaft end cover is fixed at the right end of active shaft;

[0009] Excitation unit: includes a coil disposed between the outer wall of the stator inner ring and the inner wall of the outer ring, and generates excitation when the coil is energized;

[0010] The driven rotor unit comprises an embedded outer rotor; the embedded outer rotor is coaxially sleeved between the outer wall of the inner ring of the stator and the inner wall of the outer ring through a bearing, so that the embedded outer rotor can rotate around the axis of the driving shaft relative to the stator; an upper magnet is arranged on the inner wall of the embedded outer rotor, which is coaxial with the lower magnet and spaced a set distance apart, and the upper magnet and the lower magnet have different-shaped magnetic poles; the left end of the embedded outer rotor is arranged as a toothed wheel structure for cutting the magnetic flux lines to generate braking torque, and the toothed wheel structure and the stator form a closed magnetic circuit.

[0011] Furthermore, a cooling water channel is provided on the outer side of the stator outer ring for cooling the stator.

[0012] Furthermore, the embedded inner rotor is a wheel-shaped structure provided with weight-reducing holes, the outer ring is provided with protrusions spaced at set distances along the circumferential direction, and the lower magnet is embedded between adjacent protrusions.

[0013] Furthermore, the toothed wheel structure is provided with weight-reducing holes.

[0014] Furthermore, the embedded inner rotor is spline-connected to the driving shaft.

[0015] Beneficial effects:

[0016] 1. The embedded semi-active eddy current shock absorber has the advantages of being able to achieve stepless damping adjustment, and when overloaded, the permanent magnet clutch slips, which can protect the system from impact and greatly reduce the impact load on related parts.

[0017] 2. The embedded inner rotor is spline-connected to the driving shaft, which has good guiding and centering properties and plays the role of transmitting torque.

[0018] 3. The embedded inner rotor is a wheel-shaped structure with weight-reducing holes, and the embedded outer rotor is a rotating part with openings at both ends. The toothed wheel structure at the left end is provided with weight-reducing holes. The structural design of the embedded inner rotor and the embedded outer rotor can reduce the mass and moment of inertia.

[0019] 4. A water channel side welding plate is arranged on the outside of the stator outer ring, and a cooling water flow channel is arranged between the water channel side welding plate and the outside of the stator outer ring, which can be used to cool the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of an embedded semi-active eddy current damper provided by the present invention;

[0021] Figure 2 A cross-sectional view of the main structure of an embedded semi-active eddy current damper provided by the present invention;

[0022] Figure 3 An axonometric view of an embedded inner rotor of an embedded semi-active eddy current damper provided by the present invention;

[0023] Figure 4 An axonometric view of an embedded outer rotor of an embedded semi-active eddy current damper provided by the present invention;

[0024] Figure 5 An axonometric diagram of a stator of an embedded semi-active eddy current damper provided by the present invention;

[0025] Among them: 1-driving shaft, 2-bearing end cover, 3-stator, 4-coil, 5-water channel side welding plate, 6-embedded outer rotor, 7-round nut, 8-elastic retaining ring for shaft, 9-upper magnet, 10-lower magnet, 11-sleeve, 12-embedded inner rotor, 13-shaft end cover. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0027] Reference Figure 1 to Figure 5 , an embedded semi-active eddy current damper, comprising:

[0028] Support unit: used to provide support force for the active rotor unit and the driven rotor unit. The support unit includes a stator 3. The stator 3 is an integrated structure, including an inner ring and an outer ring. The inner ring is supported on the active shaft 1 through a bearing, so that the stator 3 can rotate around its own axis.

[0029] Active rotor unit: includes active shaft 1, shaft end cover 13, embedded inner rotor 12; the middle part of active shaft 1 is rotatably matched with the inner ring of stator 3 through bearing, and the left end of active shaft 1 extends outward relative to the left end of stator 3; the right end of active shaft 1 is coaxially fixedly connected with embedded inner rotor 12; the outer wall of embedded inner rotor 12 is fixedly provided with lower magnet 10; shaft end cover 13 is fixedly provided at the right end of active shaft 1;

[0030] Excitation unit: comprising a coil 4 disposed between the outer wall of the inner ring of the stator 3 and the inner wall of the outer ring, and generating excitation when the coil 4 is energized;

[0031] The driven rotor unit comprises an embedded outer rotor 6; the embedded outer rotor 6 is coaxially sleeved between the outer wall of the inner ring of the stator 3 and the inner wall of the outer ring through a bearing, so that the embedded outer rotor 6 can rotate relative to the stator 3 around the axis of the driving shaft 3; the inner wall of the embedded outer rotor 6 is provided with an upper magnet 9 which is coaxial with the lower magnet 10 and spaced at a set distance, and the upper magnet 9 and the lower magnet 10 are mutually different-shaped magnetic poles; the left end of the embedded outer rotor 6 is provided with a toothed wheel structure for cutting the magnetic flux lines to generate a braking torque, and the toothed wheel structure and the stator 3 form a closed magnetic circuit;

[0032] The excitation unit, the active rotor unit and the driven rotor unit constitute a permanent magnet clutch.

[0033] Thus, in the semi-active control mode, the left end of the driving shaft 1 is connected to the suspension motor in the vehicle electromechanical suspension system. In this mode, the road excitation forces the wheel to move up and down, causing the suspension motor rotor to rotate, thereby driving the driving shaft 1 to rotate, and at the same time energizing the coil 4 to form a closed magnetic circuit. The lower magnet 10 on the embedded inner rotor 12 forms a certain magnetic declination with the permanent magnet 9 on the embedded outer rotor 6. Under the action of the magnetic force, the embedded inner rotor 12 drives the embedded outer rotor 6 to rotate synchronously. The embedded outer rotor 6 cuts the magnetic flux lines, and the embedded inner rotor 6 generates eddy currents and generates a damping braking torque. The larger the excitation current, the larger the damping braking torque, achieving the effect of vibration reduction. Moreover, the damping torque can be adjusted steplessly by adjusting the excitation current. Considering the influence of temperature, the current cannot be infinite. The larger the relative magnetic deflection angle, the larger the transmission torque. When the magnetic rotation angle exceeds a certain value and the transmission torque exceeds the rated transmission torque, the active rotor unit and the driven rotor unit slip, the embedded outer rotor 6 stops rotating, and the embedded inner rotor 12 continues to rotate. It can be seen that the embedded semi-active eddy current damper has the advantages of being able to achieve stepless damping adjustment, and when overloaded, the permanent magnet clutch slips, which can protect the system from impact and greatly reduce the impact load on related parts.

[0034] Specifically, refer to Figure 2 , the stator 3 is supported on the driving shaft 1 by two bearings in total, the right end face of the inner ring of the bearing near the left end of the driving shaft 1 abuts on the step surface of the driving shaft 1, and the right end face of the outer ring abuts on the bearing end cover 2. A sleeve 11 is also sleeved on the right end of the driving shaft 1, the left end of the sleeve 11 abuts on the right end of the inner ring of the bearing at the right end of the driving shaft 1, the left end of the inner ring of the bearing at the right end of the driving shaft 1 abuts on the step surface of the driving shaft 1, the shaft end cover 13 abuts on the right end of the sleeve 11, and the shaft end cover 13 and the sleeve 11 as a whole can play a role in limiting the axial displacement of the embedded inner rotor 12. The embedded inner rotor 12 is made of carbon steel, and the shaft end cover 13 is connected to the driving shaft 1 with stainless steel twisted hole bolts. The two ends of the driving shaft 1 are designed as spline shafts. The embedded inner rotor 12 is splined to the driving shaft 1, which has good guiding and centering properties and plays a role in transmitting torque.

[0035] Reference Figure 2 The lower magnet 10 is embedded between adjacent protrusions of the embedded inner rotor 12 to form a salient pole structure. The lower magnet 10 is fixed by bolts, and the magnetization direction of the lower magnet 10 is radial. The upper magnet 9 embedded in the inner wall of the right end of the embedded outer rotor 6 is fixed by bolts. The outer wall of the right end of the embedded outer rotor 6 is sleeved with a bearing. The left end of the bearing abuts against the step surface set on the inner ring and the outer ring of the stator 3. The bearing abuts against the right end of the outer ring through the round nut 7 and abuts against the right end of the inner ring through the shaft elastic circlip 8.

[0036] The bearing enables the embedded outer rotor 6 to rotate relative to the stator 3 around the axis of the driving shaft 1. Figure 3 The embedded inner rotor 12 is a wheel-shaped structure provided with a weight-reducing hole, and the outer wall of the embedded inner rotor 12 is provided with protrusions spaced at a set distance along the circumferential direction, and, referring to Figure 4 The embedded outer rotor 6 is a rotating part with openings at both ends, and the toothed wheel structure at the left end is provided with a weight-reducing hole. The structural design of the embedded inner rotor 12 and the embedded outer rotor 6 can reduce the mass and the moment of inertia.

[0037] Reference Figure 2 A water channel side welding plate is arranged on the outer side of the outer ring of the stator 3 , and a cooling water flow channel is arranged between the water channel side welding plate and the outer side of the outer ring of the stator 3 , which can be used to cool the stator 3 .

[0038] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An embedded semi-active eddy current damper, characterized in that: include: Support unit: used to provide support force for the active rotor unit and the driven rotor unit, including a stator, the stator includes an inner ring and an outer ring, the inner ring is supported on the active shaft through a bearing, so that the stator can rotate around its own axis; Active rotor unit: includes active shaft, shaft end cover, embedded inner rotor; the middle part of active shaft rotates with the inner ring of stator through bearing, the left end of active shaft extends outward relative to the left end of stator; the right end of active shaft is coaxially connected with embedded inner rotor; the outer wall of embedded inner rotor is fixed with lower magnet; the shaft end cover is fixed at the right end of active shaft; Excitation unit: includes a coil disposed between the outer wall of the stator inner ring and the inner wall of the outer ring, and generates excitation when the coil is energized; The driven rotor unit comprises an embedded outer rotor; the embedded outer rotor is coaxially sleeved between the outer wall of the inner ring of the stator and the inner wall of the outer ring through a bearing, so that the embedded outer rotor can rotate around the axis of the driving shaft relative to the stator; an upper magnet is arranged on the inner wall of the embedded outer rotor, which is coaxial with the lower magnet and spaced a set distance apart, and the upper magnet and the lower magnet have different-shaped magnetic poles; the left end of the embedded outer rotor is arranged as a toothed wheel structure for cutting the magnetic flux lines to generate braking torque, and the toothed wheel structure and the stator form a closed magnetic circuit.

2. The embedded semi-active eddy current damper according to claim 1, characterized in that: A cooling water channel is arranged outside the stator outer ring to cool the stator.

3. The embedded semi-active eddy current damper according to claim 1, characterized in that: The embedded inner rotor is a wheel-shaped structure provided with weight-reducing holes, the outer ring is provided with protrusions spaced at a set distance along the circumferential direction, and the lower magnet is embedded between adjacent protrusions.

4. The embedded semi-active eddy current damper according to claim 1, characterized in that: The toothed wheel structure is provided with weight-reducing holes.

5. The embedded semi-active eddy current damper according to any one of claims 1 to 4, characterized in that: The embedded inner rotor is spline-connected to the driving shaft.

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