CN217207506U - Electromagnetic type initiative bump leveller - Google Patents

Abstract

The utility model discloses an electromagnetic type initiative bump leveller, include: the device comprises a shell, a guide shaft, a rotor, a stator and a spring. The guide shaft is fixed relative to the shell; the rotor is arranged in the shell and movably connected with the guide shaft; the stator is arranged in the shell and is fixed relative to the shell, and the stator surrounds the rotor and is used for driving the rotor to vibrate along the guide shaft; the spring is used for driving the rotor to reset, and the spring is arranged at one end of the rotor and connected between the rotor and the shell. The utility model discloses an electromagnetic type initiative bump leveller simple structure is convenient for realize the miniaturization, can install and use in the limited place in space.

Description

Electromagnetic type initiative bump leveller

Technical Field

The utility model relates to an active vibration absorber especially relates to an electromagnetic type active vibration absorber.

Background

Noise and equipment part damage that the vibration arouses all are the problem that awaits the solution urgently in the production life, along with the development of science and technology, the mode of all kinds of active and passive vibration isolation vibration absorption is developed and utilized for people, and wherein, the initiative bump leveller is favored because all have good effect of absorbing vibration in the wide band range. The electromagnetic type active vibration absorber changes the electromagnetic rigidity of the electromagnetic spring by changing the current of the excitation coil, so that the natural frequency of the vibration absorber is changed, and the electromagnetic type active vibration absorber has the characteristics of compact structure, convenience in installation and quickness in tuning and has wide application prospect. The existing electromagnetic type active vibration absorber is mainly divided into an annular form and a square form according to an internal electromagnetic structure, wherein the annular structure has higher energy density compared with the square structure, and the performance of an electromagnetic part can be more comprehensively developed and utilized under the same structure volume.

In the structural design of the existing annular electromagnetic type active vibration absorber, in order to ensure that a rotor module and a stator module in an electromagnetic structure can realize relative motion, the supporting selection and matching of an electromagnetic part are basically divided into two types, one type is a reed type support, and the supporting form has the advantages that the radial positioning between the rotor module and the stator module can be realized by virtue of a reed, and meanwhile, the reed can play the role of a spring to provide restoring force for the rotor module in motion, so that the motion reliability is improved; however, the selection and design of the reed is a great difficulty, the low-frequency characteristic of the vibration absorber is mainly determined by the inherent frequency of the vibration absorber in order to realize the broadband vibration absorption function, and the inherent frequency of the system can be reduced only when the axial rigidity of the elastic system providing the restoring force of the mover module is low, so that the broadband control range of the vibration absorber is further widened. Secondly, the lifetime of the reed under high frequency large displacement is also a big problem.

Another kind of common supporting structure is the structure of slide bearing collocation bilateral support spring, because the radial supporting role of slide bearing, the rigidity of spring can be done very little, consequently the low frequency characteristic of widening the bump leveller of this structure can be better, but this structure also has certain limitation: the structure that two side spring supported has increased holistic size to a certain extent, has reduced structure space's utilization ratio: the sliding bearing realizes the relative motion between objects through sliding friction, and easily generates larger heat at high speed; secondly, the sliding bearing and the shaft are matched with each other generally to form a larger gap, the expansion of the matched shaft can be caused by a large amount of heat, if the gap is reduced, the motion seizure phenomenon can occur, the force performance of the electromagnetic structure has a larger sensitive tendency to the air gap (gap) between the moving module and the stator module, and the air gap change caused by the motion is a great harm for influencing the force output and the unstable linearity of the vibration absorber.

In addition, the electromagnetic type active vibration absorber in the prior art has the advantages of complex structure, difficult assembly, larger volume and difficult realization of miniaturization.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electromagnetic type initiative bump leveller, this electromagnetic type initiative bump leveller simple structure is convenient for realize the miniaturization.

In order to realize the above object of the present invention, the utility model provides an electromagnetic type initiative bump leveller, include:

a housing;

a guide shaft fixed to the housing;

the rotor is arranged in the shell and movably connected with the guide shaft;

the stator is arranged in the shell and is fixed relative to the shell, and the stator surrounds the rotor and is used for driving the rotor to vibrate along the guide shaft; and the number of the first and second groups,

and the spring is used for driving the rotor to reset, is arranged at one end of the rotor and is connected between the rotor and the shell.

Further, the number of the springs is multiple, and the springs are arranged on the periphery of the guide shaft in a surrounding mode.

Further, the axes of the springs are parallel to the axis of the guide shaft, and the axes of the springs are uniformly distributed on a circle with the axis of the guide shaft as the center.

Further, the mover includes a linear bearing coupled to the guide shaft.

Furthermore, the rotor further comprises a counterweight connected with the linear bearing, and the mass of the counterweight is adjustable.

Further, the counter weight includes with the balancing weight that linear bearing links to each other and with the counter weight regulating block that the balancing weight can be dismantled and be connected.

Furthermore, the electromagnetic type active vibration absorber further comprises a first spring seat connected with the counterweight and a second spring seat connected with the shell, and two ends of the spring are respectively fixedly connected with the first spring seat and the second spring seat.

Further, the stator include with stator core that the shell links to each other and with the coil that stator core links to each other, the active cell still include annular active cell core and connect in the annular permanent magnet of active cell core periphery, the permanent magnet with the coil sets up relatively.

Further, the stator core is provided with an annular coil mounting groove, and the coil is arranged in the coil mounting groove.

Further, the rotor core is provided with an annular permanent magnet installation groove, and the permanent magnet is arranged in the permanent magnet installation groove.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. in the electromagnetic type active vibration absorber, the spring is arranged at one end of the rotor in the vibration direction, the structure is simpler, and compared with the mode that the springs are arranged at the two ends of the vibrator, the electromagnetic type active vibration absorber is convenient to miniaturize and install in a position with limited space; in addition, the counterweight can be added under the condition that the whole volume is not changed or reduced, and the energy density of the electromagnetic type active vibration absorber can be improved.

2. As an improvement, the rotor is connected with the guide shaft through a linear bearing, the assembly precision of the rotor and the guide shaft and the performance of the rotor during high-speed vibration can be improved, the linearity of the rotor is better, meanwhile, the friction during vibration is small, the heat productivity is low, and the rotor can be continuously used for a long time.

3. As an improvement, the balance weight comprises a balance weight block and a balance weight adjusting block which are detachably connected, the mass of the whole rotor can be changed by changing the mass of the balance weight, and the vibration performance of the electromagnetic type active vibration absorber is further adjusted.

Drawings

Fig. 1 is a front view of an electromagnetic active vibration absorber according to an embodiment of the present invention.

Fig. 2 is a plan view of the electromagnetic active vibration absorber shown in fig. 1.

Fig. 3 is a sectional view in the direction a-a of the electromagnetic active vibration absorber shown in fig. 1.

Fig. 4 is a sectional view in the direction B-B of the electromagnetic active vibration absorber shown in fig. 2.

Fig. 5 is a schematic connection diagram of the mover core, the weight block, and the linear bearing according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1 to 5, an electromagnetic active vibration absorber according to a preferred embodiment of the present invention includes a housing 1, a guide shaft 2, a mover 3, a stator 4, and a spring 5.

The housing 1 includes an upper housing 10 and a lower housing 11, which are connected by bolts and cooperatively form an accommodating chamber 12 for accommodating components such as the guide shaft 2, the mover 3, the stator 4, and the spring 5. The upper case 10 is provided with an upper end plate 100, the lower case 11 is provided with a lower end plate 110, and the upper end plate 100 and the lower end plate 110 are oppositely disposed. The bottom of the lower shell 11 is provided with a flange 112, and is connected with external equipment or other objects needing shock absorption through the flange 112.

The guide shaft 2 is fixed relative to the housing 1, and may be separately connected to the upper housing 10, connected to the lower housing 11, and connected to both the upper housing 10 and the lower housing 11. In some embodiments, two ends of the guide shaft 2 are respectively connected to the upper end plate 100 and the lower end plate 110, so that the guide shaft is more stably fixed, specifically, holes or grooves adapted to the ends of the guide shaft 2 are formed in the upper end plate 100 and the lower end plate 110, for example, in fig. 3 and 4, the upper end plate 100 is provided with a through hole 101, the lower end plate 110 is provided with a mounting groove 111, and two ends of the guide shaft 2 are respectively arranged in the through hole 101 and the mounting groove 111, so that the position accuracy is higher and the connection strength is better. It will be appreciated that the guide shaft 2 may be located entirely within the housing 1 or may be located partially within the housing 1 and partially extending out of the housing 1.

The mover 3 is movably connected to the guide shaft 2, and is movable up and down along the guide shaft 2. The stator 4 is disposed in the housing 1 and fixed relative to the housing 1, and the stator 4 is annular and surrounds the mover 3 to drive the mover 3 to vibrate along the guide shaft 2.

The spring 5 is provided at one end of the mover 3 in the vibration direction, and is connected between the mover 3 and the case 1. Referring to fig. 3 and 4, in some embodiments, the spring 5 is provided at one end of the mover 3 adjacent to the lower end plate 110, and both ends thereof are coupled to the mover 3 and the lower end plate 110, respectively. The spring 5 is used to drive the mover 3 to return, and when the stator 4 drives the mover 3 to vibrate along the guide shaft 2, the spring 5 is stretched or compressed, and after the mover 3 loses the driving force of the stator 4, the mover 3 is returned by the elastic restoring force of the spring 5.

Compared with the structure that springs 5 are arranged at two ends of the rotor 3 in the prior art, the electromagnetic type active vibration absorber in the embodiment is only provided with the springs 5 at one end of the rotor 3 in the vibration direction, so that the size of the electromagnetic type active vibration absorber can be effectively reduced, the electromagnetic type active vibration absorber is beneficial to being miniaturized, the electromagnetic type active vibration absorber can conveniently work under the condition of limited external space, and a part of vacant volume can be utilized to increase a balance weight, and the energy density of the electromagnetic type active vibration absorber is improved. In addition, the structural design of the one-side spring 5 is more suitable for a miniaturized electromagnetic type active vibration absorber, on the premise of a small-size structure, the mass of the mover 5 is not too large, and the acting force between the mover 3 and the stator 4 is not too large, so that the spring 5 is not subjected to too large load, and at the moment, the rigidity of the spring 5 can be made smaller, so that the low-frequency characteristic of the electromagnetic type active vibration absorber is better widened, and the frequency band of the electromagnetic type active vibration absorber is wider.

In some embodiments, the number of the springs 5 is multiple, for example, 2, 3, 4, etc., and the springs are circumferentially disposed on the outer periphery of the guide shaft 2, so that a greater bearing force and a greater restoring force can be provided by disposing a plurality of the springs 5, which is beneficial to the reliable operation of the electromagnetic active vibration absorber. Further, in some embodiments, the axes of the springs 5 are parallel to the axis of the guide shaft 2, and the axes of the springs 5 are uniformly distributed on a circle centering on the axis of the guide shaft 2, so that the restoring force applied to the mover 3 by the springs 5 is more uniform, the balance is better, the mover 3 is not prone to side deflection during vibration, the movement precision is higher, and the linearity is better.

Further, the mover 3 includes a linear bearing 30 coupled to the guide shaft 2 through the linear bearing 30, which enables the mover 3 to slide more smoothly on the guide shaft 2. Compared with a sliding bearing, the linear bearing 30 has higher lubricating performance than a common sliding bearing, and under the condition that the radial load is not particularly large, the ball type linear bearing has better running performance at high speed, has small friction and low heat productivity and can be used for a long time continuously. When the linear bearing 30 is matched with the guide shaft 2 under the same use condition, because the heat generation is small, when the linear bearing is matched with the guide shaft 2, the clearance between the linear bearing and the guide shaft 2 can be set to be smaller than the clearance between the sliding bearing and the guide shaft 2, so that the output stability of the mover 3 in the operation process is increased, and the linearity of the electromagnetic type active vibration absorber is improved.

Further, the mover 3 includes a weight coupled to the linear bearing 30, and in some embodiments, the mass of the weight is set to be adjustable so that the overall mass of the mover 3 can be adjusted by the weight, so that the low frequency characteristics of the electromagnetic active vibration absorber can be adjusted by changing the mass of the mover 3.

In at least one embodiment, the structure of the adjustable mass counterweight is as follows, and referring to fig. 3 and 4, the counterweight includes a counterweight 310 connected to the linear bearing 30 and a counterweight adjustment block 311 detachably connected to the counterweight 310. Specifically, the weight member 310 is provided with a receiving hole 312, and the linear bearing 30 is installed in the receiving hole 312 and is fixedly connected to the weight member 310. Preferably adopt bolt 313 to connect between balancing weight 310 and the counter weight regulating block 311 to make both have higher joint strength when connecting, and the dismouting is also very convenient, through the installation or demolish counter weight regulating block 311 or install the counter weight regulating block 311 of different quality, the quality of change active cell 3 that can be convenient. The number of the counterweight adjusting blocks 311 is not limited, and may be one or more, the mass of the mover 3 can be changed by selecting different numbers of counterweight adjusting blocks 311, fig. 3 and 4 show two counterweight adjusting blocks 311, one of which is annular and is connected to the periphery of the other counterweight adjusting block 311, and the two counterweight adjusting blocks can be connected by bolts or by bonding.

Preferably, the counterweight adjusting block 311 and the spring 5 are respectively located at two ends of the counterweight 310, so that the counterweight adjusting block 311 can be more conveniently installed, for example, after the bolts connecting the upper housing 10 and the lower housing 11 are unscrewed, the upper housing 10 can be removed, and the counterweight adjusting block 311 can be disassembled and assembled.

In order to make the connection of the spring 5 to the weight block 310 more secure, a convex first spring seat 6 is provided on the surface of the weight block 310 facing the lower end plate 110, and a convex second spring seat 60 is provided on the surface of the lower end plate 110 facing the weight block 310. First spring seat 6 and second spring seat 60 are respectively inserted in both ends of spring 5 to position spring 5. Meanwhile, the spring 5 is connected with the first spring seat 6 and the second spring seat 60 in a welding manner, so that the connection is firmer, and the spring 5 can apply reliable push-pull force to the mover 3.

The stator 4 drives the mover 3 to vibrate by electromagnetic force, referring to fig. 3, the stator 4 includes a stator core 40 connected to the housing 1 and a coil 41 connected to the stator core 40, the mover 3 includes an annular mover core 32 and an annular permanent magnet 33 connected to an outer periphery of the mover core 32, the coil 41 surrounds the outer periphery of the permanent magnet 33, and the permanent magnet 33 is disposed opposite to the coil 41. When the coil 41 is energized, it can generate a changing magnetic field, and further generate a driving force that drives the permanent magnet 33 to vibrate.

Specifically, the stator core 40 may be fixed to the inner wall of the housing 1 by means of anaerobic adhesive, an annular coil mounting groove 400 is formed on a surface of the stator core 40 facing the permanent magnet 33, and the coil 41 is mounted in the coil mounting groove 400. In some embodiments, the coil 41 may be wound on the bobbin 42 first, and the coil 41 and the bobbin 42 are integrally connected in the mounting groove 400, and then filled and sealed by epoxy glue, so as to form a more secure stator 4. In order to facilitate the installation of the coil 41, the stator core 40 may be formed by connecting two or more parts, and the two or more parts are matched to form the coil installation groove 400, so that other parts can be conveniently installed to form the stator core 40 after the coil 41 and the bobbin 42 are installed.

The mover core 32 is connected to the counterweight, as shown in fig. 3, a ring-shaped groove 314 is formed between the counterweight 310 and the counterweight adjusting block 311, the mover core 32 is installed in the ring-shaped groove 314, and after the bolt 313 is locked, the counterweight adjusting block 311 and the counterweight 310 are matched to clamp two ends of the mover core 32, thereby fixing the mover core 32. Referring to fig. 5, the outer circumferential surface of the mover core 32 is provided with a ring-shaped permanent magnet installation groove 320, the permanent magnet 33 is disposed in the permanent magnet installation groove 320, and the permanent magnet 33 may be formed by splicing a plurality of permanent magnet pieces to form the ring-shaped permanent magnet 33.

After the mounting is completed, the permanent magnet 33 is disposed concentrically with the coil 41, the outer peripheral surface of the permanent magnet 33 is disposed to face the inner peripheral surface of the coil 41, and the mover core 32 and the both end portions of the stator core 40 are disposed to face at least partially. Because the coil 41 and the permanent magnet 33 are embedded in the respective cores, the gap between the upper end and the lower end of the rotor core 32 and the stator core 40 is smaller, which is beneficial to reducing magnetic field leakage, improving the utilization rate of the magnetic field, further enhancing the vibration performance and saving more energy.

In order to facilitate the wiring of the coil 41, as shown in fig. 1, 2 and 4, a navigation socket 7 is further disposed on the housing 1, the navigation socket 7 is electrically connected to the coil 41, and the navigation socket 7 is used for plugging with a navigation plug 70, so that an external device can supply power to the coil 41 through a data line and control the coil 41 to generate a magnetic field for driving the mover 3 to vibrate.

Preferably, the mover 3 and the stator 4 are both circular rings, and the circular structure has higher energy density, so that the magnetic force of the coil 41 on the permanent magnet 33 can be increased, and the vibration performance can be improved. When the mover 3 and the stator 4 are annular, the mover core 32, the permanent magnet 33, the stator core 4, the coil 41, and the like are all annular, and more preferably, the outer shape of the housing 1 and the housing cavity 12 of the housing 1 are all cylindrical.

To sum up, the utility model discloses possess following advantage at least:

1. in the electromagnetic type active vibration absorber, the spring is arranged at one end of the rotor in the vibration direction, the structure is simpler, and compared with the mode that the springs are arranged at the two ends of the vibrator, the electromagnetic type active vibration absorber is convenient to miniaturize and install in a position with limited space; in addition, the counterweight can be added under the condition that the whole volume is not changed or reduced, and the energy density of the electromagnetic type active vibration absorber can be improved.

2. As an improvement, the rotor is connected with the guide shaft through a linear bearing, the assembling precision of the rotor and the guide shaft and the performance of the rotor during high-speed vibration can be improved, the linearity of the rotor is better, meanwhile, the friction during vibration is small, the heating value is low, and the long-term use can be continued.

3. As an improvement, the balance weight comprises a balance weight block and a balance weight adjusting block which are detachably connected with each other, the mass of the whole rotor can be changed by changing the mass of the balance weight, and the vibration performance of the electromagnetic type active vibration absorber is further adjusted.

The above is only a specific embodiment of the present invention, and other improvements made on the premise of the inventive concept are all considered as the protection scope of the present invention.

Claims (10)

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

a housing (1);

a guide shaft (2) fixed to the housing (1);

the rotor (3) is arranged in the shell (1) and is movably connected with the guide shaft (2);

the stator (4) is arranged in the shell (1) and is relatively fixed with the shell (1), and the stator (4) surrounds the rotor (3) and is used for driving the rotor (3) to vibrate along the guide shaft (2); and the number of the first and second groups,

and the spring (5) is used for driving the rotor (3) to reset, and the spring (5) is arranged at one end of the rotor (3) and connected between the rotor (3) and the shell (1).

2. The electromagnetic active vibration absorber according to claim 1, wherein the number of the springs (5) is plural and is circumferentially disposed on the outer periphery of the guide shaft (2).

3. The electromagnetic active vibration absorber according to claim 2, wherein the axes of the springs (5) are parallel to the axis of the guide shaft (2), and the axes of the plurality of springs (5) are uniformly distributed on a circle centered on the axis of the guide shaft (2).

4. The electromagnetic active vibration absorber according to claim 1, wherein the mover (3) comprises a linear bearing (30) coupled to the guide shaft (2).

5. The electromagnetic active vibration absorber according to claim 4, wherein said mover (3) further comprises a counterweight connected to said linear bearing (30), said counterweight having an adjustable mass.

6. The electromagnetic active vibration absorber of claim 5 wherein said counterweight comprises a counterweight (310) connected to said linear bearing (30) and a counterweight adjustment block (311) removably connected to said counterweight (310).

7. The electromagnetic active vibration absorber according to claim 5, further comprising a first spring seat (6) connected to said counterweight and a second spring seat (60) connected to said housing (1), said spring (5) being fixedly connected at both ends to said first spring seat (6) and said second spring seat (60), respectively.

8. The electromagnetic active vibration absorber according to any of the claims 1 to 7, wherein the stator (4) comprises a stator core (40) connected to the housing (1) and a coil (41) connected to the stator core (40), and the mover (3) further comprises an annular mover core (32) and an annular permanent magnet (33) connected to the outer periphery of the mover core (32), the permanent magnet (33) being disposed opposite to the coil (41).

9. The electromagnetic active vibration absorber according to claim 8, wherein said stator core (40) is provided with an annular coil-fitting groove (400), and said coil (41) is disposed in said coil-fitting groove (400).

10. The electromagnetic active vibration absorber according to claim 8, wherein said mover core (32) is provided with an annular permanent magnet installation groove (320), and said permanent magnet (33) is disposed in said permanent magnet installation groove (320).

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