CN214256011U - High-efficiency sealed isolation vibration motor - Google Patents

Abstract

The utility model relates to a high-efficient sealed vibrating motor that keeps apart belongs to the material and carries equipment field technique. The utility model discloses the rotor shaft is located the center of the room body, install rotor coil on it, install stator coil on the corresponding room body with rotor coil, support the end shaft by supporting the section, lubricated seal section and cartridge linkage segment are constituteed, the cartridge linkage segment of supporting the end shaft inserts in the rotor shaft, and circumference is fixed between the rotor shaft, support bearing suit is at the support section of supporting the end shaft, its outer lane is through only detaining the pressure equipment on the end cover in the room body, the eccentric block symmetry is installed on the support section of the support end shaft of support bearing both sides, seal cover suit is on room internal wall, be not more than 0.1 millimeter's clearance fit for the clearance volume between outer lane and the room internal wall, the sealing member is installed in the seal groove of the seal cover ring, the lubricated seal section suit of back shaft is in the sealing washer, rotor shaft both ends structural symmetry, it is sealed good to have, use safe and reliable's advantage.

Description

High-efficiency sealed isolation vibration motor

Technical Field

The utility model relates to a high-efficient sealed vibrating motor that keeps apart belongs to the material and carries equipment field technique.

Background

The vibration motor combines machinery and electrical appliances together, has the advantages of compact structure, convenient assembly and disassembly and the like, and is widely applied to vibration equipment. With the expansion of modern production scales, the handling capacity of vibration equipment is increased, and thus the vibration force of the vibration motor is required to be increased. After the vibration force of the vibration motor is increased, the structural size of each part is increased, and the superimposed heat generated by mechanical friction and coil electrification in the working process is also increased sharply. Vibration motor generally adopts lubricating grease to lubricate, and after vibration motor's temperature rose, lubricating grease mobility increased, for preventing the loss of lubricating grease and revealing, required vibration motor's sealing performance also required corresponding improvement, especially, vibration motor's bearing room and stator, rotor coil are in the motor chamber body jointly, need carry out strict seal between the two and keep apart, otherwise lubricating grease enters into between stator and the rotor coil, can cause the insulating inefficacy between the coil. However, after the vibration force of the vibration motor is increased, the size of the motor shaft is increased, so that the sealing difficulty on the motor shaft between the coil and the support bearing is increased, because the outer diameter of the motor shaft is increased, under the condition of the same motor rotating speed, the higher the relative sliding speed of a contact part of the sealing element is, the more serious the abrasion of the contact type sealing element is, the more easily the failure of the sealing element is caused, and after the failure of the sealing element at the part is, the burning caused by the insulation failure of the motor coil can be rapidly caused. Until now, the sealing problem between the coil and the bearing of the large-scale vibration motor is not effectively solved, thereby limiting the popularization and application of the large-scale vibration motor. In order to enable the vibration motor to meet the requirement of modern industrial mass production, a new technical scheme is needed to solve the problem of sealing and isolating between the coil and the bearing of the vibration motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing such high-efficient sealed vibrating motor that keeps apart, it can solve the problem that the sealed harmfully caused the motor to burn out that present large-scale vibrating motor exists in the use effectively.

The purpose of the utility model is realized like this: a high-efficiency sealed isolation vibration motor comprises a rotor shaft, a supporting end shaft, a chamber body, an eccentric block, a supporting bearing and a sealing sleeve ring, wherein the rotor shaft is positioned at the center of the chamber body, a rotor coil is installed on the rotor shaft, a stator coil is installed on the chamber body corresponding to the rotor coil, the supporting end shaft consists of a supporting section, a lubricating sealing section and a plugging connecting section, the plugging connecting section of the supporting end shaft is inserted into the rotor shaft and is circumferentially fixed with the rotor shaft, the supporting bearing is sleeved on the supporting section of the supporting end shaft, the outer ring of the supporting end shaft is pressed in the chamber body through a stop buckle on an end cover, the eccentric block is symmetrically installed on the supporting sections of the supporting end shaft at two sides of the supporting bearing, the sealing sleeve ring is sleeved on the inner wall of the chamber body, the clearance between the outer ring and the inner wall of the chamber body is in a clearance fit with the clearance amount not more than 0.1 mm, and a sealing element is installed in a sealing groove of the sealing sleeve ring, the lubricating sealing section of the supporting shaft is sleeved in the sealing ring, and the two ends of the rotor shaft are structurally symmetrical.

The supporting bearing is a self-aligning roller bearing with an oil groove and an oil hole.

The plug-in connection section is of a spline connection structure.

The plug-in mounting connecting section is of a square section connecting structure.

The sealing element is an O-shaped rubber sealing ring.

And an oil drain hole is formed in the end cover.

Install the eccentric block symmetry on the support section of the support end axle of support bearing both sides, and install two support bearing symmetries in the both sides of rotor shaft, the eccentric power that the eccentric block produced will be born evenly by the support bearing of installing at rotor shaft both ends symmetry, and can not produce the bending action on the motor shaft between two support bearings, the motor shaft between two support bearings as long as can transmit the moment of torsion that stator and rotor coil produced to the eccentric block can, like this, for original general vibrating motor shaft that should bear moment of torsion and bear the bending action, the diameter of the motor shaft that only bears the moment of torsion just can greatly reduced. After the diameter of the motor shaft between the two supporting bearings is reduced, the relative sliding speed between the sealing piece sleeved on the motor shaft at the position and the motor shaft is greatly reduced, so that the abrasion of the sealing piece is reduced, the service life is prolonged, and the problem of the increase of the structural size of the motor shaft after the vibration force of the vibration motor is increased is effectively solved.

Because the motor shaft and the supporting bearing at the eccentric block part bear the eccentric force generated by the eccentric block, the structural size of the motor shaft and the supporting bearing is increased along with the increase of the eccentric force, namely the vibration force, so that the supporting bearing and the motor shaft at the part can work safely and reliably. If the motor shaft is of an integral structure, the small-size sealing element cannot be mounted and sealed by the structure with a fine middle part and thick two ends. For this purpose, the motor shaft is first split into two parts: the rotor shaft and the supporting end shaft are composed of a supporting section, a lubricating sealing section and a plug-in connection section, the supporting sections of the rotor shaft and the supporting end shaft are structurally designed according to normal requirements, the requirement for structural strength is met, and the diameters of the plug-in connection section and the lubricating sealing section of the supporting end shaft are reduced. The sealing sleeve ring is sleeved on the inner wall of the chamber body, the clearance between the sealing sleeve ring and the inner wall of the chamber body is in clearance fit with the clearance amount not larger than 0.1 millimeter, and then the sealing element is arranged in the sealing groove of the sealing sleeve ring. When the vibrating motor is assembled, the cartridge linkage segment supporting the end shaft is inserted into the rotor shaft, and circumferential fixed connection is carried out with the rotor shaft, meanwhile, the lubrication seal segment cartridge supporting the end shaft is in the sealing element, the relative position precision between the sealing element and the lubrication seal segment supporting the end shaft is ensured, and meanwhile, compared with a general vibrating motor, because the diameter greatly reduced of the lubrication seal segment of the novel structure is adopted, thus, when the sealing effect is ensured, because the relative sliding speed between the sealing element and the shaft is greatly reduced, the abrasion of the sealing element is also greatly reduced, and the service life of the sealing element is greatly prolonged.

By reducing the diameter of a motor shaft between the support bearing and the coil of the vibration motor, the problem of sealing between the support bearing and the coil of the motor after the vibration force of the vibration motor is increased is perfectly solved, and the sealing device has very important significance for prolonging the service life of a large vibration motor.

The self-aligning roller bearing has certain self-aligning capability and has lower requirements on the processing precision and the mounting precision of the supporting end shaft, so the self-aligning roller bearing has stronger adaptability. Because the eccentric blocks are arranged at the two ends of the supporting bearing, the space in the chamber body is larger, so that the self-aligning roller bearing with the oil grooves and the oil holes is used, the lubricating of the supporting bearing is facilitated, and meanwhile, the lubricating oil can be conveniently filled and lubricating grease can fully play a role.

The supporting end shaft and the rotor shaft are connected to form a spline connection structure or a square section connection structure, the circumferential positioning is reliable, the circumferential connection strength is high, and the like, so that the reliable connection between the supporting end shaft and the rotor shaft can be guaranteed, and the required positioning can be met.

The O-shaped rubber sealing ring has the advantages of simple structure, convenience in mounting and dismounting and the like, and therefore, the O-shaped rubber sealing ring is adopted for sealing operation at the lubricating sealing section of the supporting end shaft, and lubricating grease can be effectively prevented from entering between a stator coil and a rotor coil of the vibration motor from the lubricating position of the supporting bearing.

In order to ensure the service performance of the support bearing, the support bearing must be fully lubricated, so that enough lubricating grease is required to be present between the bearing roller and the rolling ring, and therefore, when the lubricating grease is actually filled, a large amount of lubricating grease is generally added to ensure the full lubrication of the bearing. In the time of actual operation, because the grease volume in the unable accurate judgement bearing chamber, so the volume of adding is all more, the too much grease volume in the bearing chamber, can increase rotary part's frictional resistance, improve the temperature and the mobility of lubricating grease, thereby the risk between the stator that lubricating grease entered into the motor and the rotor coil has been increaseed, for this reason, set up the oil drain hole on the high position of take the altitude on the end cover, when the lubricating grease oil level in the chamber is higher than the position of this oil drain hole, the automatic outflow chamber body of lubricating grease, thereby guarantee that the grease volume in the chamber can not be too high, both guarantee the lubrication effect, also avoid the too much problem that causes of grease volume simultaneously.

Drawings

Fig. 1, 2 and 3 are structural diagrams of an embodiment of the present invention, wherein fig. 1 is a front sectional view of the embodiment, and fig. 2 and 3 are two structures respectively shown as a partial sectional view at a position a-a in fig. 1.

Detailed Description

In the embodiment of the present invention shown in fig. 1, 2 and 3, the serial numbers of the components have the following meanings: 1. connecting holes; 2. an end cap; 3. an end cap bolt; 4. an oil drain hole; 5. a platen; 6. a platen bolt; 7. a gasket; 8. a metal bond;

9. an eccentric block; 10. a chamber body; 11. a stator coil; 12. a rotor coil; 13. a sealing collar; 14. an O-shaped rubber sealing ring; 15. a collar bolt; 16. a rotor shaft; 17. a support bearing; 18. a support section supporting the end shaft; 19. a lubricated seal section supporting the end shaft; 20. a spline; 21. a hexagonal key; 22. and (5) pressing and filling the oil cup.

In the embodiment shown in fig. 1 and 2, the high-efficiency sealing and isolating vibration motor is mounted on a device needing vibration through a connecting hole 1, and drives the vibration device to vibrate. The end covers 2 are pressed on two ends of a motor chamber body 10 by end cover bolts 3, stop buckles on the end covers are sleeved in the motor chamber body, oil drain holes 4 are formed in the end covers, pressure injection oil cups 22 are arranged on the chamber body, lubricating grease can be injected into supporting bearings through the pressure injection oil cups, the designed oil drain holes are arranged on the lower half portions of the end covers and are higher than the end covers in a certain height in a stop buckling mode, the height of the oil level of the lubricating grease in the motor chamber body can be within a proper range, and the problems of overlarge resistance and overhigh temperature rise caused by the fact that the lubricating grease is too much are solved on the premise that the lubricating effect is guaranteed. Two pressure filling oil cups 22 are arranged on the chamber body and close to the supporting bearing 17, lubricating grease is filled into the two supporting bearings through oil filling grooves in the outer ring of the supporting bearing respectively, the supporting bearing adopts a self-aligning roller bearing, the filled lubricating grease is uniformly added into a roller and a roller connecting frame between the inner ring and the outer ring of the self-aligning roller bearing through oil filling holes uniformly distributed in the circumferential direction of the outer ring, the bearing is fully lubricated, and the stable and reliable work of the self-aligning roller bearing is ensured. The self-aligning roller bearing has the advantages of large self-aligning range, strong adaptability, axial positioning, reliable use and the like. The supporting bearing is arranged on the supporting section 18 of the supporting end shaft, the eccentric blocks 9 are symmetrically arranged on two sides of the supporting bearing, and the metal key 8 is circumferentially connected with the supporting section of the supporting end shaft. The balancing weight is symmetrically installed at two ends of the self-aligning roller bearing, so that the eccentric force generated by the eccentric block, namely the exciting force, can be completely borne by a single supporting bearing, and the additional bending force can not be generated on a motor shaft between the two supporting bearings theoretically, so that the supporting section with a small shaft diameter can meet the requirement of structural strength, and the advantages are obvious.

The motor shaft comprises a support end shaft and a rotor shaft 16, which are connected by a plug-in connection section on the support end shaft, in this example, the plug-in connection section is a spline 20 structure. A pressure plate 5 is screwed on the end part of the supporting section of the supporting end shaft by adopting a pressure plate bolt 6 to enable the end part to compress an eccentric block, and the eccentric block and the supporting bearing are axially fixed on the supporting end shaft by a gasket 7. The sealing sleeve ring 13 is pressed tightly on the inner wall of the chamber body of the vibration motor through a sleeve ring bolt 15, an O-shaped rubber sealing ring 14 is installed in a sealing groove in the sealing sleeve ring, the O-shaped rubber sealing ring is sleeved on a lubricating sealing section 19 of the supporting end shaft, and the diameter of the lubricating sealing section of the supporting end shaft is far smaller than the inner diameter of the self-aligning roller bearing, namely the diameter of the supporting section of the supporting end shaft. The sealing sleeve ring outer ring and the vibration motor chamber body are in clearance fit, the clearance fit amount is 0.06 mm, and the fit precision between the sealing sleeve ring and the motor chamber body is high, so that the relative position precision between the O-shaped rubber sealing ring arranged in the sealing groove of the sealing sleeve ring and the motor shaft is very high, the O-shaped rubber sealing ring can be ensured to be sleeved on the motor shaft in a radial and uniform manner, the deformation in a certain direction is prevented from being overlarge, and the abnormal abrasion of the sealing ring is reduced. The plug-in connection section of the supporting end shaft is of a spline structure, the spline 20 is inserted into a spline hole in the rotor shaft to be circumferentially and radially positioned, and the mutual position relation among the chamber body, the supporting end shaft and the rotor shaft is ensured, so that the position relation among the supporting bearing, the O-shaped rubber sealing ring and the supporting end shaft is ensured.

Because two eccentric blocks are symmetrically arranged at two ends of one supporting bearing, and the supporting bearings are symmetrically arranged at two ends of the rotor shaft, the motor shaft between the two supporting bearings does not bear the exciting force generated by the rotation of the eccentric blocks any more, only the torsional force generated by the rotor coil needs to be transmitted, and the requirement of the torsional force on the diameter of the motor shaft is generally greatly lower than the requirement on the diameter of the motor shaft after the combined action of the exciting force generated by the eccentric blocks and the torsional force, so that the diameter of the motor shaft at the section can be greatly reduced, and during actual design, the diameter of the lubricating and sealing section of the supporting shaft can be reduced to be half to one fourth of the inner diameter of the supporting bearing. In this embodiment, the diameter of the lubrication sealing section of the support end shaft is one third of the inner diameter of the support bearing, after the diameter of the motor shaft is reduced, the speed of the rotation line of the outer surface of the motor shaft is greatly reduced, the sealing sleeve ring and the O-shaped rubber sealing ring are mounted on the lubrication sealing section of the support end shaft between the support bearing and the rotor coil, so that the relative sliding speed between the inner diameter of the O-shaped rubber sealing ring and the motor shaft is greatly reduced, and since the degree of wear of the contact-type O-shaped sealing ring is proportional to the square of the relative sliding speed, after the rotation diameter of the sealing part is reduced by three times, the wear of the O-shaped sealing ring can be reduced by 9 times, that is, the service life is improved by 9 times.

When the high-efficiency sealed and isolated vibration motor works, the stator coil 11 is electrified, the electromagnetic driving force generated between the stator coil and the rotor coil 12 drives the motor shaft to rotate at a high speed, so that an eccentric block arranged on the motor shaft also rotates at a high speed, and an eccentric force, namely an excitation force, is generated to drive vibration equipment to vibrate. Lubricating grease is added into a bearing chamber in the motor chamber body through a pressure filling oil cup, and the supporting bearing is lubricated by the lubricating grease in the process that the motor shaft drives the inner ring of the supporting bearing to rotate. This embodiment support bearing adopts self-aligning roller bearing, and at rotor coil drive rotor shaft pivoted in-process, the lubricated sealed section of supporting the end axle between support bearing and rotor coil adopts O type rubber seal to seal, and O type rubber seal's internal diameter reduces to the interior third that passes through of self-aligning roller bearing, so the wearing and tearing greatly reduced of sealing washer, has guaranteed its reliability of using, can prevent effectively that lubricating grease from getting into between stator coil and the rotor coil, causes the scaling loss of coil.

Fig. 3 shows another connection structure of the cartridge connecting section of the support end shaft of the embodiment, which uses a hexagonal key 21 with a hexagonal cross section for connection, and has the advantages of relatively simple shape and more reliable connection.

Claims (6)

1. The utility model provides a high-efficient sealed vibrating motor that keeps apart, contains rotor shaft, support end shaft, the room body, eccentric block, support bearing, sealed lantern ring, its characterized in that: the rotor shaft is positioned in the center of the chamber body, a rotor coil is arranged on the rotor shaft, a stator coil is arranged on the chamber body corresponding to the rotor coil, the supporting end shaft consists of a supporting section, a lubricating sealing section and a plug-in connecting section, the plug-in connecting section of the supporting end shaft is inserted into the rotor shaft, is circumferentially fixed with the rotor shaft, the supporting bearing is sleeved on the supporting section of the supporting end shaft, the outer ring of the eccentric block is pressed in the chamber body through the stop buckle on the end cover, the eccentric blocks are symmetrically arranged on the supporting sections of the supporting end shafts on the two sides of the supporting bearing, the sealing sleeve is sleeved on the inner wall of the chamber body, the outer ring is in clearance fit with the inner wall of the chamber body, the clearance amount is not more than 0.1 mm, the sealing element is arranged in the sealing groove of the sealing sleeve ring, the lubricating sealing section of the supporting end shaft is sleeved in the sealing element, and the two ends of the rotor shaft are symmetrical in structure.

2. The high efficiency, hermetically sealed and isolated vibration motor of claim 1, wherein: the supporting bearing is a self-aligning roller bearing with an oil groove and an oil hole.

3. The high efficiency, hermetically sealed and isolated vibration motor of claim 2, wherein: the plug-in connection section is of a spline connection structure.

4. The high efficiency, hermetically sealed and isolated vibration motor of claim 2, wherein: the plug-in mounting connecting section is of a square section connecting structure.

5. A high efficiency, sealed and isolated vibration motor as claimed in claim 1, 2, 3 or 4, wherein: the sealing element is an O-shaped rubber sealing ring.

6. A high efficiency, sealed and isolated vibration motor as claimed in claim 1, 2, 3 or 4, wherein: and an oil drain hole is formed in the end cover.

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