阅读说明：本技术 一种电磁式主动吸振器 (electromagnetic type initiative bump leveller ) 是由 唐安特 刘文帅 上官文斌 苏比哈什·如凯迦 外日·啊海迈德 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种电磁式主动吸振器,包括：上壳体；下壳体,与所述上壳体扣合连接,内部共同形成一密闭容纳腔；橡胶弹簧组件,位于所述密闭容纳腔内,其上端与所述上壳体内顶壁固定连接；永磁性运动部件,位于橡胶弹簧组件下方且内设有环形绕组容纳腔,所述永磁性运动部件上端与所述橡胶弹簧组件的径向边缘固定连接,受力时可沿密闭容纳腔轴向移动一定距离；电磁线圈绕组,上端与所述橡胶弹簧组件固定连接,下端间隙配合地插入设置在所述永磁性运动部件的环形绕组容纳槽内。本发明结构紧凑、工作性能优异、安装方便,能在宽频率范围内对目标对象进行减振。(the invention discloses an electromagnetic type active vibration absorber, which comprises: an upper housing; the lower shell is buckled and connected with the upper shell, and a closed accommodating cavity is formed in the lower shell; the rubber spring assembly is positioned in the closed accommodating cavity, and the upper end of the rubber spring assembly is fixedly connected with the inner top wall of the upper shell; the permanent magnetic moving part is positioned below the rubber spring assembly and is internally provided with an annular winding accommodating cavity, the upper end of the permanent magnetic moving part is fixedly connected with the radial edge of the rubber spring assembly, and the permanent magnetic moving part can axially move for a certain distance along the closed accommodating cavity when stressed; and the upper end of the electromagnetic coil winding is fixedly connected with the rubber spring assembly, and the lower end of the electromagnetic coil winding is inserted into an annular winding accommodating groove of the permanent magnetic moving part in a clearance fit manner. The vibration reduction device has the advantages of compact structure, excellent working performance and convenience in installation, and can reduce vibration of a target object in a wide frequency range.)

1. An electromagnetic type active vibration absorber is characterized by comprising:

An upper case (1);

the lower shell (7) is buckled with the upper shell (1), and a closed accommodating cavity is formed inside the lower shell;

The rubber spring assembly (2) is positioned in the closed accommodating cavity, and the upper end of the rubber spring assembly is fixedly connected with the inner top wall of the upper shell (1);

The permanent magnet moving part is positioned below the rubber spring assembly (2) and is internally provided with an annular winding accommodating cavity, the upper end of the permanent magnet moving part is fixedly connected with the radial edge of the rubber spring assembly (2), and the permanent magnet moving part can axially move for a certain distance along the closed accommodating cavity when stressed;

and the upper end of the electromagnetic coil winding is fixedly connected with the rubber spring assembly (2), and the lower end of the electromagnetic coil winding is inserted into an annular winding accommodating groove of the permanent magnetic moving part in a clearance fit manner.

2. The electromagnetic active vibration absorber according to claim 1, wherein the rubber spring assembly (2) comprises:

the upper end of the rubber spring inner framework (21) is provided with a threaded hole, and the lower end of the rubber spring inner framework is centrally provided with an electromagnetic coil winding connecting part;

The rubber spring (22) is fixedly arranged on the radial outer peripheral wall of the inner framework (21) of the rubber spring;

and the rubber spring outer framework (23) is fixedly arranged on the radial outer edge of the rubber spring (22).

3. The electromagnetic active vibration absorber according to claim 2, wherein the rubber spring inner frame (21) and the rubber spring (22) and the rubber spring outer frame (23) are connected by vulcanization.

4. The electromagnetic active vibration absorber of claim 2 wherein said permanent magnet moving part comprises:

the outer iron core (53) is of a cylindrical structure with a sealed bottom, and the edge of an opening of the outer iron core (53) is fixedly connected with the rubber spring outer framework (23);

The permanent magnet (52) is fixed at the bottom of the inner cavity of the outer iron core (53) in a columnar shape in the center;

and the inner iron core (51) is fixedly arranged at the top end of the permanent magnet (52).

5. The electromagnetic type active vibration absorber according to claim 4, wherein a first coil outlet (531) is penetratingly arranged on the outer peripheral wall of the outer core (53), a riveting ring (533) riveted with the rubber spring outer frame (23) is arranged on the edge of the upper end of the outer core (53), and a permanent magnet positioning groove (532) for fixedly mounting the permanent magnet (52) is centrally arranged at the bottom of the inner cavity.

6. The electromagnetic active vibration absorber according to claim 5, wherein a balanced magnetic field port (534) symmetrical to the first coil exit port (531) is further formed through the outer peripheral wall of the outer core (53).

7. the electromagnetic active vibration absorber of claim 1 wherein said electromagnetic coil winding comprises:

The upper end of the aluminum support (3) is centrally convexly provided with a rubber spring component connecting part connected with the electromagnetic coil winding connecting part, the lower end of the aluminum support is centrally provided with an annular winding frame in clearance fit with the annular winding accommodating groove, and an annular winding groove is formed in the peripheral wall of the annular winding frame along the circumferential direction;

and the coil (4) is wound on the winding groove of the annular winding frame.

8. the electromagnetic active vibration absorber according to claim 1, wherein a guide rod (6) is connected to the bottom of the permanent magnet moving component, a slide bearing positioning hole is formed through the bottom of the lower housing (7), and a slide bearing (8) which is in sliding fit with the guide rod (6) is arranged in the slide bearing positioning hole.

9. the electromagnetic active vibration absorber according to claim 1, wherein a plurality of second bolt holes (12) are circumferentially arranged at the opening of the upper housing (1), a plurality of third bolt holes (71) corresponding to the second bolt holes (12) are circumferentially arranged at the opening of the lower housing (7), and bolts are arranged in the second bolt holes (12) and the third bolt holes (71) to connect the upper housing (1) and the lower housing (7) into a whole.

10. The electromagnetic active vibration absorber according to claim 1, wherein a first bolt hole (11) is formed through the top of the upper housing (1), and a screw is arranged in the first bolt hole (11) and fixedly connected with the rubber spring assembly (2); a second coil leading-out opening (74) is arranged on the circumferential wall of the lower shell (7) in a penetrating mode, a plurality of supporting legs are evenly arranged at the bottom of the lower shell along the circumferential direction, and a fourth bolt hole (72) is arranged on each supporting leg in a penetrating mode.

Technical Field

The invention belongs to the technical field of vibration absorbers, and particularly relates to an electromagnetic type active vibration absorber.

Background

Mechanical vibrations not only cause a reduction in the performance and reliability of the machine, but also cause damage to the human body and also generate noise. In the automotive industry, people have higher and higher requirements on riding comfort and driving safety. The reduction of vibration noise during the driving of automobiles is always a goal pursued, and the adoption of the dynamic vibration absorber can reduce the vibration of automobiles.

the dynamic vibration absorber includes a passive vibration absorber, a semi-active vibration absorber, and an active vibration absorber. The passive vibration absorber does not need external energy, and can well inhibit the vibration of a vibration-damping object at a specific frequency; the semi-active vibration absorber is based on the principle of a passive vibration absorber, the vibration absorbing frequency of the vibration absorber can be adjusted within a certain range by modifying the structural parameters of the semi-active vibration absorber, but the vibration absorbing effect of the semi-active vibration absorber is poor for the vibration problem of wider variation range of the excitation frequency; the active vibration absorber adopts external energy supply, and the drive vibration absorber generates an acting force which has the same frequency and the same amplitude but has an opposite phase with an exciting force so as to counteract the effect of the exciting force on a vibration reduction object.

Disclosure of Invention

in view of the above technical problems, the present invention is directed to provide an electromagnetic active vibration absorber that has a compact structure, excellent working performance, and convenient installation, and can damp a target object in a wide frequency range.

the purpose of the invention is realized by at least one of the following technical schemes:

an electromagnetic active vibration absorber, comprising:

An upper housing;

the lower shell is buckled and connected with the upper shell, and a closed accommodating cavity is formed in the lower shell;

The rubber spring assembly is positioned in the closed accommodating cavity, and the upper end of the rubber spring assembly is fixedly connected with the inner top wall of the upper shell;

the permanent magnetic moving part is positioned below the rubber spring assembly and is internally provided with an annular winding accommodating cavity, the upper end of the permanent magnetic moving part is fixedly connected with the radial edge of the rubber spring assembly, and the permanent magnetic moving part can axially move for a certain distance along the closed accommodating cavity when stressed;

and the upper end of the electromagnetic coil winding is fixedly connected with the rubber spring assembly, and the lower end of the electromagnetic coil winding is inserted into an annular winding accommodating groove of the permanent magnetic moving part in a clearance fit manner.

further, the rubber spring assembly includes:

The upper end of the rubber spring inner framework is provided with a threaded hole, and the lower end of the rubber spring inner framework is provided with an electromagnetic coil winding connecting part in the middle;

the rubber spring is fixedly arranged on the radial outer peripheral wall of the inner framework of the rubber spring;

and the rubber spring outer framework is fixedly arranged on the radial outer edge of the rubber spring.

Further, the rubber spring inner framework is connected with the rubber spring, and the rubber spring is connected with the rubber spring outer framework through vulcanization.

Further, the permanent magnet moving part includes:

The outer iron core is of a cylindrical structure with a sealed bottom, and the edge of an opening of the outer iron core is fixedly connected with the outer framework of the rubber spring;

the permanent magnet is columnar and is fixed at the bottom of the inner cavity of the outer iron core in the middle;

And the inner iron core is fixedly arranged at the top end of the permanent magnet.

furthermore, a first coil leading-out opening is arranged on the outer peripheral wall of the outer iron core in a penetrating mode, a riveting ring which is fixedly riveted with the rubber spring outer framework is arranged on the edge of the upper end of the outer iron core, and a permanent magnet positioning groove used for fixedly mounting the permanent magnet is arranged in the middle of the bottom of the inner cavity.

furthermore, a balance magnetic field port symmetrical to the first coil leading-out port is arranged on the outer peripheral wall of the outer iron core in a penetrating mode.

further, the electromagnetic coil winding includes:

The upper end of the aluminum bracket is centrally convexly provided with a rubber spring component connecting part connected with the electromagnetic coil winding connecting part, the lower end of the aluminum bracket is centrally provided with an annular winding frame in clearance fit with the annular winding accommodating groove, and the outer peripheral wall of the annular winding frame is circumferentially provided with an annular winding groove;

and the coil is wound on the winding groove of the annular winding frame.

furthermore, the bottom of the permanent magnet moving part is connected with a guide rod, the bottom of the lower shell is provided with a sliding bearing positioning hole in a penetrating mode, and a sliding bearing in sliding fit with the guide rod is arranged in the sliding bearing positioning hole.

furthermore, a plurality of second bolt holes are formed in the opening of the upper shell along the circumferential direction, a plurality of third bolt holes corresponding to the second bolt holes are formed in the opening of the lower shell along the circumferential direction, and bolts are arranged in the second bolt holes and the third bolt holes to connect the upper shell and the lower shell into a whole.

furthermore, a first bolt hole penetrates through the top of the upper shell, and a screw is arranged in the first bolt hole and fixedly connected with the rubber spring assembly; the circumference wall of lower casing is gone up to run through and is provided with the second coil and draws out the mouth, and the bottom evenly is provided with a plurality of supporting legs along circumference, each all run through on the supporting leg and be provided with the fourth bolt hole.

Compared with the prior art, the electromagnetic type active vibration absorber provided by the invention has the following advantages:

The output force of the invention has good linearity along with the change of current and quick and reliable response; the structure is compact, enough acting force can be provided, and the complex vibration control requirement is met; vibration control can be performed on the vibration damping object in a wide frequency range; the radial vibration cannot occur, and the performance is stable and reliable; the sealing performance is good, and the service life is long.

Drawings

FIG. 1 is a perspective view of an assembly structure according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an assembled structure according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a rubber spring assembly according to the present invention;

FIG. 4 is a cross-sectional view of a rubber spring assembly of the present invention;

FIG. 5 is a schematic perspective view of a moving part according to the present invention;

FIG. 6 is a schematic perspective view of the upper housing of the present invention;

Fig. 7 is a perspective view of an outer core according to the present invention;

Fig. 8 is a schematic bottom view of an outer core according to the present invention;

FIG. 9 is a schematic structural view of the lower case of the present invention;

reference is made to the accompanying drawings in which:

1-upper shell, 11-first bolt hole, 12-second bolt hole, 2-rubber spring component, 21-rubber spring inner skeleton, 22-rubber spring, 23-rubber spring outer skeleton, 3-aluminum support, 4-coil, 5-permanent magnetic moving part, 51-inner iron core, 52-permanent magnet, 53-outer iron core, 531-first coil outlet, 532-permanent magnet positioning groove, 533-riveting ring, 534-balance magnetic field port, 535-first threaded hole, 6-guide rod, 7-lower shell, 71-third bolt hole, 72-fourth bolt hole, 73-sliding bearing positioning hole, 74-second coil outlet, 8-sliding bearing.

Detailed Description

the invention will now be further described by way of specific examples in conjunction with the accompanying drawings.

as shown in fig. 1 and 2, an electromagnetic type active vibration absorber includes:

An upper case 1 made of stainless steel;

the lower shell 7 is made of stainless steel and is connected with the upper shell 1 in a buckling mode, and a closed accommodating cavity is formed inside the lower shell, so that a magnetic field inside the active vibration absorber is closed.

the rubber spring assembly 2 is positioned in the closed accommodating cavity, and the upper end of the rubber spring assembly is fixedly connected with the inner top wall of the upper shell 1;

The permanent magnet moving part is positioned below the rubber spring component 2 and is internally provided with an annular winding accommodating cavity, the upper end of the permanent magnet moving part is fixedly connected with the radial edge of the rubber spring component 2, and the permanent magnet moving part can axially move for a certain distance along the closed accommodating cavity when stressed;

And the upper end of the electromagnetic coil winding is fixedly connected with the rubber spring component 2, and the lower end of the electromagnetic coil winding is inserted into an annular winding accommodating groove of the permanent magnetic moving part in a clearance fit manner.

As shown in fig. 3 and 4, the rubber spring assembly 2 includes:

The upper end of the rubber spring inner framework 21 is provided with three threaded holes and is connected with the upper shell 1 through three M4 bolts, and the lower end of the rubber spring inner framework is centrally provided with an electromagnetic coil winding connecting part;

the rubber spring 22 is fixedly arranged on the radial outer peripheral wall of the inner framework 21 of the rubber spring;

And the rubber spring outer framework 23 is fixedly arranged on the radial outer edge of the rubber spring 22 and is riveted with the upper end of the permanent magnetic moving part 5.

the rubber spring inner frame 21 and the rubber spring 22 are connected through vulcanization, and the rubber spring 22 and the rubber spring outer frame 23 are connected through vulcanization. The rubber spring assembly 2 has certain axial rigidity and is used for supporting the permanent magnet moving part 5 and enabling the permanent magnet moving part 5 to have certain axial moving stroke.

As shown in fig. 5 and 7, the permanent magnet moving member 5 includes:

The outer iron core 53 is of a cylindrical structure with a sealed bottom, and the edge of an opening of the outer iron core 53 is fixedly connected with the rubber spring outer framework 23;

the permanent magnet 52 is fixed at the bottom of the inner cavity of the outer iron core 53 in a columnar shape in the center;

And an inner core 51 fixedly arranged at the top end of the permanent magnet 52.

As shown in fig. 8, a first coil outlet 531 is formed through the outer peripheral wall of the outer core 53 for leading out a coil, a rivet ring 533 fixed to the rubber spring outer frame 23 by riveting is provided at an edge of the upper end of the outer core 53, and a permanent magnet positioning groove 532 for fixedly mounting the permanent magnet 52 is centrally provided at the bottom of the inner cavity.

specifically, the inner iron core 51 and the outer iron core 53 are both made of a material with good magnetic conductivity, the inner iron core 51 is provided with a boss, the permanent magnet 52 is provided with a groove, the boss of the inner iron core 51 is matched with the groove of the permanent magnet 52 through interference fit, the inner iron core 51 is fixed on the permanent magnet 52, the permanent magnet 52 is matched with the permanent magnet positioning groove 532 through interference fit, the permanent magnet 52 is fixed on the outer iron core 53, and the rubber spring outer framework 23 is turned over and riveted on the riveting ring 533.

In addition, a balanced magnetic field port 534 symmetrical to the first coil leading-out port 531 is further formed in the outer peripheral wall of the outer core 53 in a penetrating manner, and the size of the balanced magnetic field port 534 is completely the same as that of the first coil leading-out port 531, so that the radial magnetic field force applied to the outer core 53 is balanced.

as shown in fig. 2, the electromagnetic coil winding includes:

the upper end of the aluminum bracket 3 is centrally convexly provided with a rubber spring component connecting part connected with the electromagnetic coil winding connecting part, the lower end of the aluminum bracket is centrally provided with an annular winding frame in clearance fit with the annular winding accommodating groove, and the outer peripheral wall of the annular winding frame is circumferentially provided with an annular winding groove;

And the coil 4 is wound on the winding groove of the annular winding frame, and a lead extending out of the coil 4 is connected with the electronic control unit.

the coil 4 is an enameled copper wire and is uniformly wound on the aluminum support 3, the aluminum support 3 is fixed on the rubber spring inner framework 21 through threads, the coil 4 and the aluminum support 3 are located inside the permanent magnetic moving component 5, a lead of the coil 4 is connected to the outside through coil leading-out ports of the moving component 5 and the lower shell 7 respectively, the lead is connected with the electronic control unit, and in the working process of the vibration absorber, the aluminum support 3 and the coil 4 are fixed and are in clearance fit with the permanent magnetic moving component 5 without contact.

as shown in fig. 2, a second threaded hole 535 and a guide rod 6 are provided at the bottom of the outer core 53, the upper end of the guide rod 6 is connected to the second threaded hole 535 through an external thread, the lower end of the guide rod 6 is a smooth surface, a sliding bearing positioning hole is provided at the bottom of the lower housing 7 in a penetrating manner, and a sliding bearing 8 which is in sliding fit with the smooth surface of the guide rod 6 is provided in the sliding bearing positioning hole in an interference fit manner. When the vibration absorber works, the guide rod 6 and the sliding bearing 8 generate sliding friction, and the guide rod 6 plays a role in guiding and positioning the permanent magnet moving part 5 to prevent the permanent magnet moving part 5 from vibrating in the radial direction.

as shown in fig. 6, four second bolt holes 12 are circumferentially provided at the opening of the upper case 1, four third bolt holes 71 corresponding to the second bolt holes 12 are circumferentially provided at the opening of the lower case 7, and M4 bolts are provided in the second bolt holes 12 and the third bolt holes 71 to fix the upper case 1 to the lower case 7, so that the magnetic field inside the active vibration absorber is closed.

as shown in fig. 9, three first bolt holes 11 are penetratingly formed in the top of the upper casing 1, and three M4 bolts pass through the first bolt holes 11 to fixedly connect the rubber spring assembly 2 to the inner top wall of the upper casing 1; a second coil lead-out port 74 is arranged on the circumferential wall of the lower shell 7 in a penetrating mode and used for leading the coil to the outside, three supporting legs are evenly arranged at the bottom of the lower shell along the circumferential direction, and a fourth bolt hole 72 is arranged on each supporting leg in a penetrating mode and used for fixing the lower shell 7 on a vibration damping object through bolts.

The electromagnetic active vibration absorber of the above embodiment is assembled by the steps of:

firstly, assembling the permanent magnet moving part 5, namely, installing the inner iron core 51 on the permanent magnet 52 and fixing the permanent magnet 52 on the outer iron core 53;

Then the coil 4 is wound on the aluminum bracket 3, the aluminum bracket 3 is fixed on the rubber spring inner framework 21 through threads, after the assembly of the fixed part is completed, the rubber spring outer framework 23 is riveted on the outer iron core 53, the relative displacement is not generated, meanwhile, the leading-out wire of the coil 4 is ensured to be led out from the first coil leading-out opening 531, and the quality of the part is supported by the rubber elastic component 2;

then fixing the sliding bearing 8 on the lower shell 7, connecting the guide rod 6 with the outer iron core 53, and connecting the rubber spring inner framework 21 with the upper shell 1 through bolts;

Finally, the upper shell 1 and the lower shell 7 are assembled together, and meanwhile, the guide rod 6 is ensured to penetrate through the sliding bearing 8, and the lead-out wire of the coil 4 is ensured to be led out from the second coil lead-out opening 74.

The working principle of the electromagnetic active vibration absorber of the embodiment is as follows:

the control unit collects vibration acceleration signals of a vibration damping object through the acceleration sensor, and after control calculation, sine current is introduced to the coil 4, so that the magnetic field distribution inside the vibration absorber and the electromagnetic force inside the vibration absorber are changed. Since the aluminum bracket 3 and the coil 4 are fixed, the permanent magnet moving member 5 and the rubber spring bobbin 23 move under the action of electromagnetic force and deform the rubber spring 22. In the working process, the guide rod 6 guides the movement of the permanent magnet moving part 5. By inputting sinusoidal currents of different amplitudes and frequencies to the coil 4, the force generated by the active vibration absorber can be adjusted, and active control of vibration of the vibration-damped object is achieved.

the electromagnetic type active vibration absorber changes the magnetic field distribution around the vibration absorber by adjusting the sine-changed alternating current applied to the coil, and accurately controls the amplitude, the frequency and the phase of the output force of the vibration absorber, thereby realizing active vibration absorption.

finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.