WO2014146568A1

WO2014146568A1 - Electric motor and concrete demolition hammer using same

Info

Publication number: WO2014146568A1
Application number: PCT/CN2014/073618
Authority: WO
Inventors: 冯玉加
Original assignee: Feng Yujia
Priority date: 2013-03-19
Filing date: 2014-03-18
Publication date: 2014-09-25
Also published as: CN203180742U

Abstract

An electric motor and concrete demolition hammer using the same, a brushed electric motor comprising a stator (22), a rotary shaft (23), and a rotor (21) fixed on the rotary shaft (23); the rotary shaft (23) is supported by a bearing (14) and is provided with a commutator assembly (32) and a corresponding electric brush assembly (3) thereon; a separator (25) is located between the rotor (21) and the commutator assembly (32), thus separating the rotor (21) from the commutator assembly (32) and the electric brush assembly (3) in two different spaces. The concrete demolition hammer comprises a hammer body (5), a vibration system (1) disposed in the hammer body (5), an electric motor system (2) providing power for the vibration system (1), and a tail pipe system (6) connected to the hammer body (5); the electric motor system (2) employs a brushed electric motor; the tail pipe system (6) has a duct-type cavity therein; the space where the commutator component (32) and the electric brush assembly (3) are located is in communication with the duct-type cavity in the tail pipe system (6). Because the commutator component (32) and the electric brush assembly (3) of the electric motor are arranged outside the space where the rotor (21) is located, the working performance of the brushed electric motor in a closed environment is improved.

Description

Electric motor and concrete vibrating bar using the same

The present invention relates to a concrete internal vibrator, and more particularly to an electric motor built-in concrete vibrating bar; and to an electric motor.

Background technique

Concrete vibrating bar (hereinafter referred to as vibrating bar), also known as concrete vibrating bar, concrete internal vibrator, plug-in concrete vibrator, etc., when working, insert the vibrating bar rod into the concrete, and directly transmit its vibration wave It is transmitted to concrete to eliminate the air bubbles in the concrete pouring construction, to carry out tamping, to make the concrete compactly combined, to eliminate the honeycomb and pockmark of the concrete, to improve its strength and ensure the quality of the concrete members. In order to effectively achieve the above objectives, according to the relevant technical specifications, the vibration frequency of the concrete vibrating bar is required to be above 167 Hz, which belongs to the high-frequency vibrator. If the vibrating power source is provided in a rotating manner, without frequency conversion (shifting) of the rotating power source , its speed should be above l OOOOrpm (rev / min, r / m). Therefore, to achieve such a concrete vibrating bar, the first thing that needs to be solved is to obtain the vibration frequency that meets the above requirements, that is, the speed problem; the second is to be able to work reliably for a long time in a specific environment.

The concrete vibrating bars that are commonly used today include motor external type and motor built-in type. With the development of technology, the miniaturization of equipment and the need for environmental protection and energy conservation, the built-in concrete vibrating bar of the motor is gradually replacing the external vibrating bar of the electric machine. The built-in concrete vibrating rod of the motor mounts the motor that supplies the vibration power source in the rod body of the vibrating rod, and drives the vibration mechanism in the rod body to achieve the purpose of vibrating the rod body. In a specific implementation manner, the The vibrating mechanism is generally realized by an eccentric block (Fig. 7 provides a structural schematic diagram of the vibrating system constituted by the vibrating mechanism). In use, the rod of the concrete vibrating bar is inserted into the interior of the concrete for work. Due to the limitation of the structure and size of the rod body, especially its internal space, it is now known that such concrete vibrating rods are generally used as a power source for a synchronous or asynchronous AC motor (such as a squirrel cage AC motor) having a relatively simple structure. The speed of such an AC motor is limited by the frequency of the AC (for example, the power supply frequency in China is 50 Hz), so the speed is low. In order to achieve a suitable vibration frequency, frequency conversion must be performed. One is to use a mechanical frequency conversion (shifting) structure to speed the rotational output of the motive to increase the rotational speed of the eccentric mass to achieve the corresponding vibration frequency. Such devices are rarely used due to their complicated structure. The other type is to convert the power supply frequency to 167 Hz or higher (the speed of the AC motor can reach l OOOOrpm) through a special electronic frequency conversion control device, and output it to the concrete vibrating bar to meet the requirements. Therefore, it is necessary to use different frequency conversion control devices or control methods according to different power supply frequencies and output frequencies.

Among the vibrating rods of the above two structures, the vibrating rod realized by the electronic frequency converter has a simple rod structure, and is a technical solution widely used for high-end concrete vibrating rods at home and abroad. The advantage is that the rod body is used as a wearing part, the structure is simple, the replacement cost is relatively low, and the high-frequency variable frequency control equipment (generally, the price of each unit is several thousand or even tens of thousands of yuan) can be used repeatedly. However, although the electronic frequency conversion control equipment of such vibrating rods can be repeatedly used, due to the use of electronic frequency conversion technology, the working environment often has high requirements, and the construction environment of the construction site is bad, dust and humidity are high, and Equipment migration during construction, slight mismanagement during use, etc. are extremely likely to cause damage to fragile electronic inverter control equipment, resulting in high cost of acquisition, use and maintenance. At the same time, due to its Including two parts, equipment migration and use are very inconvenient, often require two people to work together to complete the work; on the other hand, because it can only use AC work, the construction site power supply, etc. are required, often need It is extremely inconvenient for the construction work to be carried out by wiring or setting up the power generation equipment.

Due to the DC motor, its speed is not affected by the power supply frequency. It can easily reach its speed of 10,000 rpm by the existing conventional motor design technology. Therefore, it has been proposed to use a conventional DC motor as the built-in concrete vibrating rod of the motor. Power source.

Chinese utility model patent application 98229657. 6 (name: motor built-in type plug-in concrete vibrator) discloses a technical solution realized by using a conventional direct current motor, which directly loads an ordinary direct current motor into a closed rod body, In use, the rod is inserted into the concrete. In order to protect the motor and also to ensure insulation, it is necessary to seal the rod well. But when the DC motor is working, the brush and the commutator (also called the commutator,

Co hidden uta tor ) will generate electric sparks and form high temperature (its temperature is much higher than the rotor) and can not dissipate heat. Brush wear causes powder (dust) to be discharged, which is extremely easy to cause brushes in the same enclosed space. Damage to components such as commutators, rotors, stators, etc. and damage to insulation properties. Due to the limited space in the rod, the brush is inconvenient to install due to its small internal space and the presence of components such as rotors and stators. The effects of high temperature and brush dust make the insulation process difficult or even impossible to handle. Moreover, in the working process, the brush and the commutator need to continuously form an oxide film on the working surface to reduce the wear, and the corresponding oxidizing environment cannot be provided in the closed space (requires a certain oxygen and humidity, generally ordinary air is This oxidizing environment can be provided). The practical solution of this technical solution is poor, and it is impossible to realize a "vibrating rod" that can be actually used, and it may burn out as soon as it is turned on.

Chinese Utility Model Patent Application 200520018353. 0 (Name: Brushless DC Motor System Integrated Concrete Vibrating Bar) discloses a technical solution realized by brushless DC motor. Although it solves the above-mentioned defects in the ordinary DC motor, since the operation of the brushless DC motor requires a dedicated brushless DC motor controller and a Hall element for detecting the rotational position state of the motor, due to the limitation of the bar space and the environment. The brushless DC motor controller can only be placed externally and connected to the brushless DC motor via a cable. The Hall element must be mounted in the rod and connected to an external brushless DC motor controller. Consisting of two parts (rod and brushless DC motor controller), it leads to a drawback similar to the technical solution using an AC motor, except that the brushless DC motor controller is relatively small in size. On the other hand, the power variation during construction causes a large change in the motor current, and the electronic components of the electronic inverter control device have relatively poor impact resistance; moreover, the Hall element is relatively fragile and is easily damaged in a complicated and harsh construction environment. And because the rod is in a closed state, the high temperature formed by the operation of the motor can greatly reduce the working life of the Hall element and even cause damage thereto. At the same time, its cost is relatively high. For the above reasons, the vibrating rods using this technical solution have poor practicability and the actual use value is not high.

In summary, due to the limitation of the size of the rod, the space inside the rod is limited. In the case that no external equipment is needed, the related art has difficulty in realizing the direct insertion of the ordinary motor into the vibrating rod body to realize the relevant technical indexes.

Summary of the invention

In view of the above drawbacks, the technical problem to be solved by the present invention is to provide a built-in concrete vibrating bar for a motor which is small in size, simple in structure, and capable of meeting actual construction and use requirements without external equipment.

And to provide a brushed motor that can work normally in a limited medium space. A method of improving the performance of a brushed motor is also provided.

The technical solution adopted by the present invention is:

A brushed motor comprising a stator, a rotating shaft and a rotor fixed on the rotating shaft, wherein the rotating shaft is supported by a bearing, the rotating shaft is provided with a commutator assembly, and the corresponding brush assembly comprises a spacer, The spacer is located between the rotor and the commutator assembly, separating the rotor from the commutator assembly and the brush assembly in two different spaces.

Preferably, the spacer is a first bearing of the rear end of the motor, such that the commutator assembly and the brush assembly are in a space outside the first bearing.

Preferably, the space in which the commutator assembly and the brush assembly are located is in communication with a cavity, wherein the cavity has a gas, and the gas contains oxygen and water vapor. The gas constitutes an oxidizing environment that facilitates the formation of an oxide film during operation of the commutator assembly and the brush assembly.

Preferably, the method further includes an air circulation system that interfaces with a space in which the commutator assembly and the brush assembly are located; the air circulation system includes an air forced convection component, a convection air passage, and an air-filled air circulation And the storage cavity.

Preferably, the air forced convection component is an air compressor or a fan; the fan is fixed on the rotating shaft and driven by the rotating shaft.

Preferably, further comprising a filter member disposed in the air circulation and storage cavity, and dividing the air circulation and storage cavity into a second cavity and a third cavity; The flow duct includes a first air passage that communicates the space in which the commutator assembly and the brush assembly are located with the third cavity; the second cavity and the commutator assembly are electrically connected by the air forced convection member A second air passage that communicates with the space in which the brush assembly is located.

a concrete vibrating rod comprising a rod body, a vibration system provided in the rod body, a motor system for powering the vibration system, a tail pipe system connected to the rod body, the motor system having the foregoing a brush motor; a duct type cavity in the tail pipe system; a space in which the commutator assembly and the brush assembly are located communicates with a duct type cavity in the tail pipe system.

Preferably, the vibration rotary shaft of the vibration system is coupled to a rotating shaft of the electric motor, the vibration rotary shaft penetrates through the second bearing and is supported by the second bearing, and eccentric components are respectively disposed on two sides of the second bearing .

Preferably, the eccentric component on the outer side of the second bearing is an eccentric block disposed on the vibrating rotary shaft; the centroid of the motor rotor is offset from the rotation axis of the rotating shaft to constitute an eccentric component located inside the second bearing .

Preferably, an eccentric block is disposed on the vibrating rotary shaft on the inner side of the second bearing; a center of mass of the two eccentric blocks is located on the same side of a rotation axis of the motor rotor.

Preferably, further comprising a filter member, a duct assembly and an air forced convection member, the air forcible convection member being located between the space in which the commutator assembly and the brush assembly are located and the air duct assembly; Provided in the duct-type cavity, and dividing the duct-type cavity into a second cavity at the front end of the tail pipe system, a third cavity at the rear end of the tail pipe system; the air duct assembly includes a front end a funnel-shaped return chamber, a return tube disposed at a bottom of the return chamber through the air passage assembly and communicating with the outside thereof; an opening formed at a front side of the duct assembly and communicating with a manifold at a rear end of the duct assembly; a return tube, a set The air tubes are staggered on the air duct assembly, passing through the walls of the air duct assembly from different directions but not communicating with each other; the manifold is connected to the exhaust pipe, and the exhaust pipe passes through the filter member and the third Cavity Connected; the exhaust pipe and the air duct assembly form a return passage in the duct type cavity of the tail pipe system; the air forced convection member is disposed at an end of the rod body, and the gas forced convection member and the rod outer casing The intermittent passage constitutes an exhaust passage; the exhaust passage, the gas collecting pipe, the collecting pipe, and the exhaust pipe communicate the space where the commutator assembly and the brush assembly are located with the third cavity; the return passage, the return pipe, and the return cavity The second cavity is in communication with the space in which the commutator assembly and the brush assembly are located via an air forced convection member.

Preferably, further comprising a power control system disposed in the duct type cavity in the tail pipe system, the power control system is coupled to the power cable and powering the motor system; the power control system includes a control switch or a sensor, the control switch or sensor being fixed in a duct-type cavity near the front end of the tail pipe system and the rod connecting portion.

Preferably, the power control system includes a memory circuit and a sensor, the sensor is a magnetron sensor; the memory circuit is connected to a power cable, and the memory circuit is connected to the magnetron sensor through a control line, the memory circuit The motor system is connected to the motor system; the operating state of the magnetron sensor is controlled by a sliding of a magnetic element located outside the tail pipe system.

A method for improving the performance of a brushed motor for improving the performance of a brushed motor in a closed environment, moving the commutator assembly and the brush assembly of the motor out of the space in which the rotor is located.

Preferably, the gas in the space in which the commutator assembly and the brush assembly are located are circulated and/or filtered to provide a suitable working environment for the commutator assembly and the brush assembly.

In terms of technical effects: The brushed motor based on the above technical solution effectively improves its working performance in a closed environment and effectively guarantees its normal operation. The electric motor built-in concrete vibrating bar realized by the brush motor is used as the power source and the above-mentioned technical means, and the rotation speed can reach 11000-12000 rpm, or even higher, effectively meeting the relevant technical indexes of the concrete vibrating rod. It is possible to work with existing AC power and even use battery power directly. According to the trial and error, the concrete vibrating bar realized by the above technical solution can work continuously for more than 200 hours without failure. If the superior performance accessories (such as bearings) are selected, the trouble-free working life can be further provided; It will not be damaged during long idle time. The invention uses a brushed motor embedded in the rod body, realizes that no special frequency conversion control device is needed, can directly work with power of any frequency, and directly uses DC power to work, for example, using a portable battery. For AC power, only a simple bridge rectifier circuit is required to achieve the same operation (if a silicon steel sheet winding stator is used, it can work without rectification). It is preferable to use a DC motor, which has low power consumption, small volume, large torque, and strong excitation force, which can well meet relevant design specifications. "Using the "pick" type vibration system, it can form an ideal circular vibration model __The end of the rod is a zero vibration point that is not subjected to the exciting force, and the exciting force is concentrated on the vibrating head at the front end of the rod body, and is free as vibration. The end is vibrated to effectively enhance the exciting force of the rod and has a long service life.

DRAWINGS

In order to more clearly describe the related technical solutions of the present invention, the drawings referred to below will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art In other words, other drawings can be obtained based on these drawings without paying creative labor.

1 is a schematic structural view of a first embodiment of a concrete vibrating bar of the present invention; Figure 1 is a partial structural view showing a second embodiment of the concrete vibrating bar of the present invention;

Figure 3 is a partial structural view showing a third embodiment of the concrete vibrating bar of the present invention;

Figure 4 is a schematic structural view of the first bearing sleeve;

Figure 5 is a front view of the fan;

Figure 6 is a front view of the air duct assembly;

Figure 原理 Schematic diagram of the vibrating system of concrete vibrating bar in the prior art;

Figure 8 is a schematic diagram of an embodiment of a vibration system of the present invention;

Figure 9 is a schematic diagram of another embodiment of the vibration system of the present invention;

Figure 10 is a schematic structural view of the embodiment of Figure 8;

Figure 11 is a schematic structural view of the embodiment of Figure 9;

Figure 12 is a schematic view showing the structure of a silicon steel sheet according to an embodiment of the motor structure of the present invention;

Figure 1 is a schematic view showing the structure of a rotor of another embodiment of the motor structure of the present invention;

Figure 14 is a schematic structural view of the internal components of the end of the tail pipe system;

Figure 15 is a schematic block diagram of an embodiment of a power control system in accordance with the present invention;

Figure 16 is a schematic block diagram of another embodiment of the power control system of the present invention;

Figure 17 is a structural schematic view of a sensor used in an embodiment of the power control system of the present invention;

Figure 18 is a structural schematic diagram of a control switch used in another embodiment of the power control system of the present invention.

Description of the reference signs:

1. Vibration system; 11. First eccentric block; 110. Eccentric block; 12. Eccentric block fastening bolt; 1 3. Vibrating rotary shaft; 14. Second bearing; 141. First bearing bearing; 142. Bearing; 15. second eccentric block; 2. motor system; 21. rotor; 2101. boss; 2102. winding slot; 2103. centroid adjustment hole; 2104. low density wedge; 2105. high density wedge; Small mass department; 212. large mass part; 22. stator; 23. shaft; 230. shaft hole; 24. first bearing sleeve; 241. trunking; 25. first bearing; 251. spacer; Brush assembly; 31. Support; 32. Commutator assembly; 33. Brush holder; 34. Brush; 4. Air circulation system; 40. Air compressor; 401. Air outlet; 402. Suction port; a cavity; 411. bypass exhaust passage; 412. radial return passage; 41 3. axial return passage; 414. second cavity; 415. bypass vent; 42. fan; 422. Fan fastening bolts; 4220. Fan fastening holes; 423. Connections; 424. Fan blades; 425. Guards; 43. Exhaust passages; 44. Air duct components; 441. Recirculation chambers; Tube; 443. gas gathering 444. manifold; 45. barrier; 46. exhaust pipe; 47. second cavity; 48. filter; 49. third cavity; 6. tail pipe system; 61. first connector; 610. return channel; 62. hose fastener; 63. hose; 64. end cap; 641. second connector; 642. retainer; Power controller; 71. Control switch; 711. Vibration sensor; 7111. Insulated housing; 7112. Pendulum; 711 3. Elastic component; 7114. Touch electrode; 712. Vibration control switch; 7121. Housing; Vibrating hammer; 7123. Responsive parts; 7124. Push-type memory switch; 7125. Button; 72. Control line; 73. Motor cable; 74. Power cable.

detailed description

In order to facilitate a person skilled in the art to understand the present invention, and to clearly understand the technical solutions described in the present application, the related technical contents of the present invention are fully and fully disclosed, and the specific embodiments of the present invention will be described below with reference to the accompanying drawings. The detailed description is to be construed as illustrative of the embodiments of the invention Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without the creative work, and/or without departing from the spirit and scope of the present invention, even according to the present invention Various changes and modifications are possible, but such corresponding changes and modifications are intended to fall within the scope of the invention.

The definitions or supplements of related terms involved in the present invention are as follows:

Electric motor (English: E lect r ic motor ), a machine that converts electrical energy into mechanical energy. The rotor of the motor is driven by electromagnetic induction, and the mechanical energy is outputted by the rotor. It can be divided into a DC motor and an AC motor. A brushed motor is one of the types, which includes a brushed DC motor and a series-excited AC/DC motor, which both transmit external electric energy to the rotor through the cooperation of the brush and the commutator, and the basic structure of the two is the same. Or similar, can use AC or DC power, but different structures have some differences in cost and effective power output.

Centrifugal force (Cent r ifuga l force ) refers to the force that deviates from the center of rotation due to the rotation of the object. It also refers to an apparent force in the rotating reference frame that causes the object to deviate outward in the radial direction away from the axis of rotation. Centripetal force but in the opposite direction. In the present invention, centrifugal force is generated by the rotating eccentric member. The center of mass of the eccentric member is not on the axis of rotation, and includes components having an eccentric structure such as an eccentric block.

Exc i ta t ion force, a force that vibrates a moving part and a test piece by a vibration generator to generate vibration. In the present invention, centrifugal force is generated by an eccentric member that rotates in the vibration system to form an exciting force of the vibration system.

The invention improves the working performance of the brushed motor by moving the commutator component and the brush assembly of the motor to the space where the rotor is located, in order to improve the working performance of the brushed motor in a closed environment. Methods. Further, a suitable working environment is provided for the commutator component and the brush assembly by circulating and/or filtering the gas in the space in which the commutator assembly and the brush assembly are located. Thus, a brushed motor and a built-in concrete vibrating rod of the motor realized by the brushed motor are realized.

The basic technical solution of the present invention includes a brush motor and a concrete vibrating bar, and specifically includes:

a brushed motor comprising a stator, a rotating shaft and a rotor fixed on the rotating shaft, wherein the rotating shaft is supported by a bearing, the rotating shaft is provided with a commutator assembly, and the corresponding brush assembly comprises a spacer, the spacer Located between the rotor and the commutator assembly, the rotor is separated from the commutator assembly and the brush assembly in two different spaces. In the embodiment provided in the drawings, the bearing includes a first bearing, a second bearing; of course, the bearing may also be a bearing that is provided at other positions for supporting the rotating shaft.

a concrete vibrating bar comprising a rod body, a vibration system disposed within the rod body, a motor system for powering the vibration system, a tail pipe system coupled to the rod body, the motor system using the right An electric motor; a duct type cavity in the tail pipe system; a space in which the commutator assembly and the brush assembly are located communicates with a duct type cavity in the tail pipe system.

An example of a specific application and implementation is given below by way of example:

As shown in FIG. 1, the concrete vibrating bar includes a rod 5 and a tail pipe system 6 connected to the rod 5. The rod 5 is composed of a casing 52 and a vibration system 1 disposed therein in sequence, a motor system 2 for powering the vibration system 1, a commutator assembly 32 and a brush assembly 3 for transmitting electrical energy to the motor system 1, and an air circulation. Part of the system 4 is composed. specifically:

The front end of the outer casing 52 of the rod 5 is a vibrating head 51. The vibrating head 51 is the front end closing member of the rod 5, and is also the portion with the largest amplitude during the vibrating operation of the rod 5, and is the strongest for applying vibration to the concrete. The part, so it should have a high strength to achieve impact resistance and wear resistance. At the same time, in order to increase the overall quality of the rod 5, different weights can be used as needed. The vibrating head 51 can be coupled to the housing 52 by any known technique. The rear end portion of the outer casing 52 is a connection portion that mechanically connects with the first connector 61 of the tail pipe system 6. In practical applications, both the outer casing 52 and the vibrating head 51 are made of steel, so that they can be screwed (and can be waterproof sealed by a gasket) for assembly and disassembly, of course, if the process permits, The two are manufactured as one integral part, which improves the mechanical strength, the sealing effect, and the number of parts; accordingly, the rear end of the outer casing 52 can be connected to the first connector 61 by any known technique, such as 釆Threads, cassettes or other joints that enable a sealed connection (and can be waterproof sealed by a gasket), even structures suitable for welding, bonded structures, and the like.

Inside the outer casing 52, the vibrating system 1 is a "pick" type structure of a single load bearing, and a set of load bearing is used to support a vibrating rotary shaft to which an eccentric member is fixed on both sides thereof, that is, a set of load bearing bearings. "A pair of eccentric members are actuated and the centrifugal force generated thereby is transmitted to the outer casing 52 of the rod 5. Due to the limitation of the existing bearing manufacturing technology and the large exciting force generated by the vibration, the strength of the single bearing bearing is insufficient, and in actual use, a plurality of bearing bearing assemblies are used to form the bearing assembly, which is implemented in the embodiment of the present application. It is realized by a load bearing group (ie, a second bearing 14) composed of three load-bearing bearings. Of course, it can also be realized by using other numbers of load-bearing bearings as needed. In the embodiment provided in Fig. 1, the vibration system 1 is specifically constructed such that the vibrating rotary shaft 13 mechanically coupled to the rotating shaft 23 is supported by a second bearing 14 composed of three load bearing members, and the second bearing 14 is fixed to the inner wall of the outer casing 52, and the rotating shaft 23, the axis of rotation of the vibrating rotary shaft 13 is in a straight line; the first eccentric block 11 is fixedly connected to the vibrating rotary shaft 13 on the outer side of the second bearing 14 (near the front end side of the rod body 5) by the eccentric block fastening bolt 12. A second eccentric block 15 is fixedly connected to the vibrating rotary shaft 13 on the inner side of the second bearing 14 (on the side close to the motor system 2) via the eccentric block fastening bolt 11, and the two eccentric blocks 11, 15 are located on the vibrating rotary shaft 13 The same side of the axis of rotation, and preferably such that the centroid connection between the two is in the same plane as the axis of rotation of the vibrating rotary shaft 13; further, the centrifugal force generated when the two eccentric blocks 11, 15 rotate relative to the first The torque of the two bearings 14 is the same or close. Further, the rotor center of the motor system 1 is offset from the rotation axis of the rotating shaft 23 to constitute an eccentric rotor (preferably, the centroid of the rotor and the centroid of the eccentric mass are on the same side of the rotation axis, and preferably located at the centroid of the eccentric mass and the vibration rotary shaft 13 The eccentric rotor constitutes an eccentric component, and the motor system 2 and the vibration system 1 are effectively integrated, and centrifugal force is generated during rotation to enhance the exciting force generated by the vibration system 1, thereby reducing or even The second eccentric block 15 is eliminated, thereby reducing the occupation of the components and the space inside the rod 5, realizing the rational use of the effective space in the rod 5 without reducing the exciting force, or enabling the rod according to design requirements. The length of the body 5 can be reduced to meet different application requirements, and the related technical solutions for the specific implementation will be described in detail later. In order to increase the eccentric mass, the vibrating rotary shaft 13 can also be an eccentric member having an eccentric structure with a guaranteed strength, for example, a part or all of the vibrating rotary shaft 13 is made into a semi-cylindrical shape, which is used in FIG. The vibration rotary shaft 13 on the outer side of the second bearing 14 is formed into a semi-cylindrical shape. Although the embodiment provided in Figure 1 The medium vibration system 1 uses the above-mentioned "pick" type structure, but in fact, it can also be other "pick" type structures provided later, and can also use the traditional "lift" type structure (the principle is as shown in Fig. 7). ). Of course, the vibration system 1 described above can also be implemented by other existing excitation methods.

The motor system 1 is a brush motor, which is composed of a stator 11, a rotating shaft 23, a rotor 21 fixed to the rotating shaft 23, a commutator unit 32, a brush assembly 3, and the like. The rotor 21 is composed of a rotor core and an armature winding (rotor winding) wound around the rotor core. To reduce eddy current, the rotor core is composed of a plurality of silicon steel sheets insulated from each other, and the core has a power supply pivot. The winding slots in which the windings are placed, the respective commutator segments of the commutator assembly 32 are electrically coupled to respective armature windings to supply power to the armature windings via the commutator assembly 32. The rotating shaft 23 is disposed at a front end of the rod body 5 (the bearing is a supporting bearing of the rotating shaft 23 of the motor system 1 and a supporting bearing for vibrating the rotating shaft 13 of the vibration system 1 , and the two are combined, The structure is simplified, the occupation of the limited space of the rod is reduced, the first bearing 25 at the rear end is supported, the commutator assembly 32 on the rotating shaft 23, and the brush assembly 3 are located outside the first bearing 25 (the rod 5) In the space of the end side, that is, the first bearing 25 is located between the rotor 21 and the commutator assembly 32 and the brush assembly 3. In Fig. 1, the commutator sub-assembly 32 is located at the rear end of the rotating shaft 23, and the corresponding position is corresponding to the brush assembly 3, and the brush assembly 3 is fixed to the inner wall of the outer casing 52. The brush assembly 3 includes an insulative support 31, a brush holder 33 fixed to the support 31, and a brush 34 placed in the holder 33. The support body 31 is made of a hard material having a certain rigidity, and a thick printed circuit board is generally used to fix the brush holder 33, and at the same time, as a whole of the brush assembly 3, it is fixedly connected with other components (such as the casing 52 in the present invention). The brush holder 33 is a mechanical guide groove for holding and holding the position of the brush 34, and is generally also a passage for the brush 34 to be connected to the external circuit (the power supply cable is also directly connected to the brush 34), which ensures that the brush 34 is therein. It is free to move along the radial direction of the commutator assembly 32 and can maintain a small contact resistance with the brush 34, so it is a support, positioning and power supply component of the brush 34; the power supply cable is connected to the brush holder 33, the brush 34 is generally applied with pressure by an elastic member such as a spring, and is in sliding contact with the commutator assembly 32 to supply power to the commutator subassembly 32. Brush 34 generally uses a carbon brush. Since the outside of the brush assembly 3 generally has no insulating layer, the insulation of the brush assembly 3 and the outer casing 52 and other components is ensured, and an insulating layer is disposed at a position where the brush assembly 3 is mounted on the inner wall of the outer casing 52, and generally can be insulated by laying insulating paper. Paint can be.

With the above technical solution, the commutator assembly 32 and the brush assembly 3 are moved outside the working space of the rotor 21 without adding additional components, which helps to cause sparking between the brush 34 and the commutator assembly 32. The high temperature gas and exhaust gas can be led to heat dissipation, and the brush 34 is worn to generate powder which can also be discharged (by heat dissipation or discharge through the space in the tail pipe system 6 of the connecting rod 5, if it is used as a general brush motor or other type of brush The motor is also easy to handle the heat or exhaust.) At this time, the first bearing 25 serves as a spacer to isolate the brush 34 and the commutator assembly 32 from the rotor 21 and the stator 22 in different physical spaces without being burnt by the high temperature and electric spark of the brush 34 and the commutator assembly 32. The rotor 21, the stator 22 and its insulating protective layer, the brush dust also does not affect the working performance of the motor system. By this structure, the limitation of the installation space of the motor system 1 in the rod 5 is effectively expanded, and the brush assembly 3 has a sufficiently wide space outside the first bearing 15 for installation, and also facilitates effective insulation treatment of the space. It is also convenient to provide a corresponding oxidizing environment (oxygen and humidity) for forming an oxide film on the working surface during operation of the brush 34 and the commutator assembly 32 through the outside or other spaces connected; and also for the use of the subsequent air circulation system 4 By this technical means, the distance between the two bearings supporting the rotating shaft 23 at both ends of the rotor is shortened, and the disturbance of the internal rotating shaft 23 is reduced, especially for the anti-disturbance of the rotating shaft of the motor with the eccentric rotor and the vibration motor. During installation, maintenance and replacement In the process of the brush 34, the replacement of the relevant components in the brush assembly 3 and the related cable connection can be quickly performed without disassembling the components such as the bearing, the rotating shaft 23 and the rotor 21, thereby providing work efficiency. The utility model effectively improves the working performance of the brushed motor and the convenience of installation and maintenance, and ensures that the brushed motor in the concrete vibrating rod can work normally for a long time, and lays a foundation for the realization of related technical indexes.

To ensure that the commutator subassembly 32 is electrically connected to the armature windings on the rotor 21, Figure 4 provides the first bearing sleeve.

24 is a schematic structural view of the shaft, including a shaft hole 230 along the central axis, through which the shaft 23 passes, and the first bearing sleeve 24 is sleeved on the shaft 23, and the outer wall of the first bearing sleeve 24 is parallel to the central axis. A wire slot 241 is opened for the connection of the commutator subassembly 32 to the armature winding on the rotor, and the damage of the assembled first bearing 25 to the connecting line is avoided, and the enameled wire constituting the armature winding is directly directly worn. The first slot 15 is sleeved on the outer wall of the rotating shaft 23, and the number of the slots is matched according to the design of the motor. Generally, four symmetrical designs can fully satisfy the requirements; the first bearing 15 is sleeved on the outer wall of the rotating shaft 23. . The connection of the first bearing 25 to the shaft 23 is conveniently achieved by the first bearing sleeve 14, and a reliable electrical connection of the commutator assembly 32 to the armature winding is also ensured.

The stator 22 is fixed to the inner wall of the outer casing 52. For the brushed direct current motor, the stator 22 may be a permanent magnet stator or a permanent magnet stator, or may be composed of a stator core and a field winding (stator winding) wound around the stator core. One winding stator.

The permanent magnet type stator may be fixed to the inner wall of the outer casing 52 by means of bonding or the like by a cylindrical or tile type permanent magnet. Of course, the stator groove may be opened on the inner wall of the outer casing 52 to fix the permanent magnet. Alternatively, the permanent magnet is fixed to the inner wall of the outer casing 52 by a bracket or the like. The stator may be composed of a plurality of permanent magnet combinations.

As a technical solution of the winding stator, the stator core is directly constituted by a part of the steel casing 52, and a stator is arranged by winding a stator winding inside the casing 52, and the stator winding is formed in the winding groove. The advantage of the solution is that the stator 22 and the outer casing 52 are an inseparable whole body, which has strong working stability and is not easily damaged, but is not convenient to implement. As another technical solution realized by the stator 22, the winding stator is fixed as a separate member on the inner wall of the outer casing 52. As an implementation of the technical solution, the stator core is disposed on the arc-shaped steel plate to arrange a winding slot, and the stator winding is wound in the winding slot. As another implementation manner, the outer diameter and the inner diameter of the outer casing 52 satisfy the intermittent fit (in fact, the interference fit can also be used), and the inner diameter conforms to the design requirements of the stator (or iron pipe), on the outer wall of the steel pipe (and / or the inner wall) mills all the winding slots required for a complete stator to place the corresponding stator windings to form the stator; a slot is formed between the different winding slots through the inner and outer walls of the steel tube, but the slots are not longitudinally Through the entire stator, that is, between adjacent winding grooves, a small amount of steel pipe is not penetrated by the groove to form a magnetic pole connecting portion of each part of the stator (electromagnetic magnetic pole), and the stator of one electric motor constitutes an interconnected whole; Generally, a magnetic pole connecting portion may be formed at both ends of the steel pipe constituting the stator, or at both ends and in the middle, with a steel pipe wall of 1 to 8 hidden width. The stator formed by this technical solution can be conveniently placed into the outer casing and fixed in one piece. Although there is a magnetic pole connection portion, the magnetic flux loss to each part of the stator (electromagnetic magnetic pole) is small due to its small size. It does not affect the performance of the whole motor. Moreover, due to the existence of the magnetic pole connecting portion, the whole stator is a fixed whole. During the working process and during the collision of the vibrating rod, no damage will be caused to the stator structure, and the whole is enhanced. The stability and reliability of the performance of the vibrating bar can also reduce the radial thickness of the stator 22, thereby reducing the occupation of the space inside the bar. Of course, it is also possible to use materials that are not magnetically conductive to connect the various parts of the stator (ie, instead of the slots between the various parts of the stator), It is also possible to make the stator integral, which is the most ideal design from the viewpoint of performance, but this will significantly increase the process difficulty and cost, and the improvement of the performance of the corresponding motor is not significant, and thus is not preferable from the viewpoint of cost. As a scaled application, it is preferable to form the stator core of the above structure directly through a mold. The stator winding and the rotor winding may be connected by a shunt type, a series excitation type and a compound excitation type. If the conditions permit, the other type may be used, but the preferred method of the concrete vibrating rod is a shunt type and a series excitation type.

For a brushed AC motor, that is, a series AC motor, the stator 22 of the above-described brushed DC motor can be used for the stator 22, and the stator winding and the rotor winding are connected in series (similar to the series-excited type described above). That is, the stator winding and the rotor winding form a series circuit through the brush 34 and the commutator assembly 32, and the phase of the current in the stator winding and the rotor winding changes synchronously. Since the residual magnetism of the ordinary steel or iron is high, eddy current is formed, thereby losing electric energy. Although the stator structure of the brushed DC motor described above can realize the operation of the series-excited AC motor, the energy conversion rate is low, and the power of the motor is reduced. Therefore, the stator core should use a silicon steel sheet similar to the rotor core and insulated from each other. Stacked. Therefore, the use of a series-excited AC motor increases the complexity and cost of the process. At the same time, due to the use of laminated silicon steel sheets in the stator core, the size of the rod 5 is increased at the same power. Therefore, as the present invention, it is preferable to use a brushed straight u motor.

In practical applications, in order to simplify the components and facilitate installation and maintenance, and also to increase the strength, the rotating shaft 23 of the motor and the vibrating rotating shaft 13 are integrally formed by the same rotating shaft. When the motor system 1 is in operation, heat generated by the rotor 21 and the stator 22 is dissipated through the outer casing 52 through the external wet-cold concrete. In the design of the rotational speed of the motor system 1, the existing mature technology can be used, and the rotational speed of the brush motor described above can be designed to meet the requirements of 11000-12000 rpm or even higher.

The tail pipe system 6 is mainly composed of a hose 63, a first connector 61 for sealingly connecting the hose 63 with the outer casing 52 of the rod 5, and an end cover 64 of the end portion of the hose 63, which are connected according to different connections. Material, use any well-known, suitable connection. In the embodiment provided in Figure 1, the first connector 61 is threadedly sealed to the outer casing 52. During use of the vibrating bar, the constructor holds the hose to control the insertion, presentation, and placement of the bar in the concrete. Movement and state change, the hose 63 must also have a high strength when it meets certain bending flexibility. In order to ensure the reliability of the connection of the hose 63 with the first connector 61, the connection portion of the first connector 61 with the fastening hose 63 has an annular groove for increasing the connection friction and enhancing the connection sealing effect. A hose fastener 62 is attached to the outside of the connecting portion hose 63 to fasten the hose 63 to enhance the joint strength and sealing effect. A communicating duct type cavity is formed inside the hose 63, the first connector 61, and a cable for powering the motor system 2 (not shown in FIG. 1 for simplicity of the drawing) penetrates through the end cap 64 and passes through the duct The cavity is connected to the motor system 2 to provide an inexpensive, and also protects the cable from damage; in addition, the duct cavity is filled with air or other gas containing oxygen and water vapor (in order to increase the humidity of the gas), Thereby forming an oxidizing environment which is favorable for forming an oxide film during operation of the commutator assembly and the brush assembly, and directly communicating with the space where the commutator assembly 32 and the brush assembly 3 are located, providing heat dissipation, dust exhaust passage and satisfying the same The air environment formed by the oxide film can be achieved by natural convection. Thereby, the normal and efficient operation of the motor system 2 in the closed rod 5 is more effectively ensured. Further, in the tail pipe system 6, a control system for controlling the opening and closing of the motor system 2 (for simplicity of the drawing, not shown in Fig. 1) may also be provided. The end cap 64 may be a sealing member for sealing the hose 63, or may be a member having a waterproof entry but ensuring air in and out of the duct-type cavity in the tailpipe system 6. Of course, the tail pipe system 6 can also use the above-mentioned technical solution with the software 63, and use a rigid straight pipe, but the length of the tail pipe system 6 of this technical solution will be limited to the present, and the use and The migration is slightly unchanged.

In order to further improve the working environment of the motor system 1, an air circulation system 4 disposed at the end of the rod 5 and the tail pipe system 6 includes an air forced convection component, a convection air passage, an air circulation and a storage cavity, and An air filter component or the like; the convection air passage includes a first air passage and a second air passage. The duct-type cavity in the tail pipe system 6 communicates with the space in which the commutator sub-assembly 32 and the brush assembly 3 are located, so that the air circulation system 4 interfaces with the space in which the commutator sub-assembly 32 and the brush assembly 3 are located. The ducted cavity in the tailpipe system 6 constitutes an air circulation and storage cavity.

In the embodiment provided in FIG. 1, the air circulation system 4 includes a fan 42 disposed at the end of the rod body 5 and fixed to the rear end surface of the rotating shaft 23 for forced convection of air, and a wind disposed at the tail of the fan 42. The runner assembly 44, the return passage 610 formed in the duct-type cavity inside the tail pipe system 6, and the second cavity 47 and the third cavity 49 partitioned therein by the filter member 48, and forming an arrow therein as shown in the figure Airflow in the direction shown; the second cavity 47, the third cavity 49 constitutes an air circulation and storage cavity; the fan 42 acts as an air forced convection component. specifically:

The fan 42 is an axial fan, and is fixed to the rear end surface of the rotating shaft 23 by a fan fastening bolt 422, and has a rotating shaft 13 rotationally driven to form an air flow that blows the brush assembly 3; since the commutator assembly 32 is disposed at the rear end of the rotating shaft 23. For the purpose of insulation, it is preferable to provide an insulating pad 421 having an insulating effect on the rear end surface of the rotating shaft 23; in order to facilitate airflow movement around the brush assembly 3, heat dissipation and dust emission are facilitated, between the fan 42 and the commutator assembly 32. There is a gap to form the first cavity 41; an exhaust passage 43 formed by a gap between the outside of the fan 42 and the outer casing 52. In order to facilitate the movement of the airflow in the exhaust passage 43, preferably, the fan 42 is constructed with a damper 425. As shown in FIG. 1 and FIG. 5, the fan 42 includes a blade 424, a connecting member 423 fixed in the middle of the fan 42 and driving the fan blade 424 to rotate, and a fan disposed at the center of the connecting member 423 for mounting the fan fastening bolt 422. The fixing hole 4220 is located at the end of the blade 424. By this structure, when the fan 42 rotates, the airflow movement inside and outside the fan 42 (outside the dam 425) does not affect each other, thereby forming an opposite inside and outside the fan 42. The direction of air movement.

The air duct assembly 44, which is immediately behind the fan 42 but does not affect the rotation of the fan 42, provides an operating passage for the circulation of air, which uses the structure shown in FIG. The air duct assembly 44 is a funnel-shaped member that communicates the first cavity 41 with the third cavity 49, respectively, and communicates the first cavity 41 with the second cavity 47. As shown in FIG. 1 and FIG. 6, it includes a funnel-shaped return chamber 441 at the front end, and a return pipe 442 disposed at the bottom of the return chamber 441 through the air duct assembly 44 and communicating with the outside; the opening is disposed at the front side of the duct assembly 44 and A gas collection pipe 443 communicating with the manifold 444 at the rear end of the air duct assembly 44; a return pipe 442 and a gas collection pipe 443 are alternately disposed on the air duct assembly 44, passing through the walls of the air duct assembly 44 from different directions but not communicating with each other. The air duct assembly 44 is used to conduct airflow in different directions of motion in a narrow space. The number of the return pipe 442 and the gas collecting pipe 443 is designed as needed according to the magnitude of the gas flow rate and the collection range of the gas flow. FIG. 6 shows the four sets of the return pipe 442 and the gas collecting pipe 443 which are alternately arranged. At the same time, for some other application scenarios, the shape of the return chamber 441 and the opening position of the air collection tube 443 can be appropriately adjusted. For example, the return chamber 441 is at the center of the front end surface of the air duct assembly 44 and penetrates the center of the front end surface, and the air collection tube 443 The opening is also distributed on the front end surface of the duct assembly 44, that is, the opening of the manifold 443 and the return chamber 441 are both on the end surface; or the opening of the manifold 443 is located on the side of the duct assembly 44 or the like. In the embodiment provided in FIG. 1, the return chamber 441 of the duct assembly 44 faces the working surface of the fan 42 blade 424, and the opening of the manifold 443 forms an exhaust passage formed by the gap between the outside of the fan 42 and the outer casing 52. 43 through, in the duct assembly The rear side of the 44 is provided with a blocking member 45 which prevents the gas of the exhaust passage 43 from leaking to the rear side of the air duct assembly 44 on the one hand, and fixes the air duct assembly 44 to the inner wall of the outer casing 52 on the other hand; The inner side of the opening of the gas collecting pipe 443 (near the center side of the air duct assembly 44) is circumscribed to the shin guard 425 (may be the outer side surface of the outer shin guard 425, or the inner side surface, or the outer side surface of the shin guard 425 The position between the inner sides is such that the airflow on the fan blades 424 is effectively prevented from originating from the return chamber 441, and the airflow outside the dam 425 can enter the air collecting duct 443. The manifold 444 is connected to the exhaust pipe 46. The exhaust pipe 444 passes through the second cavity 47 and the filter member 48 disposed in the tail pipe system 6, and enters the third cavity 49. Of course, the manifold 444 can also be used. Formed integrally with the exhaust pipe 46, that is, the manifold 444 is extended to meet the above structural requirements; however, since the exhaust pipe 46 will generally pass through a portion of the hose 63 in the tail pipe system 6, the hose 63 is in operation The bending of the rod 5 is caused by the movement and control of the rod 5. Therefore, if the tail pipe system 6 has a hose 63 that needs to be bent, the exhaust pipe 46 is also preferably a hose. A return passage 610 is formed between the exhaust pipe 46, the duct assembly 44, and the duct type cavity (mainly the cavity in the first connector 61) in the tail pipe system 6, and the return passage 610 is in communication with the return pipe 442. The filter member 48 can be made of a sponge, a hole paperboard or the like which can prevent dust from passing through and has good gas permeability, and the position of the filter member 48 can be flexibly set. Normally the third cavity 49 is significantly larger than the second cavity 47. Of course, if it is desired to further shorten the length dimension of the rod 5, the duct assembly 44 can also be moved into the tailpipe system 6. The use of the above-described air duct assembly 44 effectively provides a viable air duct for relatively complex air circulation convection in a limited space, which can also be applied to other fields to achieve cyclic convection of various types of fluids.

In operation, under the forced convection of the fan 42, the dust, exhaust gas and heat-carrying air in the first cavity 41 are discharged by the fan 42 from the exhaust passage 43 outside the fan 42 to the collecting pipe at the rear end of the fan 42. 443, and through the manifold 444 in the air duct assembly 44, the exhaust pipe 46 connected to the manifold 444 is sent to the third cavity 49 in the tail pipe system 6, due to the action of the fan 42, on both sides of the filter member 48 The pressure difference is formed, and the cold air of the third cavity 49 passes through the filter member 48 to filter out the dust and the like, and then enters the second cavity 47, and passes through the return channel 610, the return pipe 442, and the return cavity 441 to enter the fan 42 and blows toward the brush assembly 3. The first cavity 41 where the commutator subassembly 32 is located. In this way, forced dusting and heat dissipation of the dust-containing and high-temperature gas in the first cavity 41 where the brush assembly 3 and the commutator assembly 32 are located are forcibly, and a new film for promoting the formation of the oxide film is introduced. An oxygen-containing gas having a corresponding humidity (in actual use, air having a certain humidity) is advantageous for the operation of the motor system 2.

In this embodiment, the space in which the commutator assembly 32 and the brush assembly 3 are located (including the space of the first cavity 41) and the first air passage 49 are connected by the exhaust passage 43 and the set. The air pipe 443, the manifold 444, and the exhaust pipe 46 are formed. The second air passage 47 communicates with the commutator sub-assembly 32 and the space in which the brush assembly 1 is located (including the space of the first cavity 41) via the fan 42 through the return passage 610 and the return pipe 442. , a recirculation chamber 441, and the like.

Of course, the air circulation system 4 can be applied to other types of motor systems or generator systems independently of the embodiments of the present invention, and can be applied to other devices or fields directly or based on its ideas. , to carry out air (or other gas, liquid) circulation, filtration in the application environment. For applications other than concrete vibrating bars, the third cavity 49 may be completely open or may not require a filter member 48, respectively, the exhaust pipe 46, the return passage 610 (may also be implemented by a separate pipe) Open to dock with external space or other space that meets your application needs. Figure 2 provides a second embodiment of a concrete vibrating bar implemented based on a brushed motor; this embodiment differs from the embodiment of Figure 1 in that: the commutator assembly 32, the brush assembly 3 are located in the first bearing 25 and the rotor Between 21, a spacer 251 is disposed between the commutator assembly 32, the brush assembly 3 and the rotor 21; and the structure of the air circulation system 4 is adapted accordingly. Specifically include:

The spacer 251 is made of a material capable of withstanding high temperature, such as metal, a polymer material, or asbestos, and is formed into a circular ring member. The spacer 251 may be a separate member fixed to the rotating shaft 23 to rotate synchronously with the rotor 21, and the spacer 251. It can rotate with respect to the outer casing 52 and the stator 22; or the spacer 251 can be fixed to the inner wall of the outer casing 52, and the rotation of the rotor 21 on the rotating shaft 23 does not affect it. In order to enhance the isolation effect, it is also possible to use the combination of the above solutions to form the spacers 251 with two components, one fixed to the outer casing 52, one fixed to the rotating shaft 23, staggered; or the spacer 251 and the opposite The parts that are rotated are made of soft elastic contact, such as a brush-like part made of a high temperature resistant material. The spacer 251 separates the commutator assembly 32 and the brush assembly 3 from the space in which the rotor 21 and the stator 22 are located to be in two different physical spaces, and blocks the electricity generated between the brush 34 and the commutator assembly 32. The influence of the high temperature gas and exhaust gas caused by the spark on the rotor 21, the stator 22 and its insulating layer, the brush dust does not affect the working performance of the motor. The abrasion of the brush 34 to produce powder can also have the opportunity to be discharged (by heat dissipation or discharge through the space in the tail pipe system 6 of the connecting rod 5, if it is used as a conventional brush motor or other type of brushed motor, it is also convenient to dissipate heat. Or exhaust treatment). A technical effect similar to that of the technical solution provided in Fig. 1 is formed.

Correspondingly, the air circulation system 4 is also modified, including an air forced convection component, a convection air passage, an air circulation and a storage cavity, and an air filtering component, etc.; the convection air passage includes a first air passage, Second air duct. The duct-type cavity in the entire tail pipe system 6 constitutes a third cavity 49. An interval is provided between the spacer 251 and the brush assembly 3 to facilitate the flow of air. A fan 42 , a fan 42 and a brush assembly are mounted between the brush assembly 3 and the first bearing 25 at the rear end of the shaft 23 . 3 has a gap to form the first cavity 41; a filter member 48 is mounted on the inner wall of the outer casing 52, and a second cavity 414 is formed between the filter member 48 and the first bearing 25. The fan 42 may be an axial fan or a centrifugal fan. In the embodiment provided in FIG. 2, an axial fan is taken as an example. There is a radial return passage 412 extending through its radial direction on the shaft 23, the radial return passage 412 corresponding to the opening in the fan connector wall of the fan 42, and enabling the airflow in the return passage 412 to be forced convection in the fan 42. The first cavity 41 is inserted into the first cavity 41. The rear end of the rotating shaft 23 has an axial return passage 413 which penetrates the end surface and extends to and communicates with the radial return passage 412. The radial return passage 412 and the axial return passage 413 will be the first cavity. 41. The second cavity 414 is in communication. A bypass exhaust passage 411 connecting the first cavity 41 and the third cavity 49 is disposed in the rod body 5, and the bypass exhaust passage 411 has a bypass exhaust hole 415 in the third cavity 49, at the first The intermittent corresponding position between the cavity 41 and the spacer 251 and the brush assembly 3 is provided with a bypass air inlet (illustrated in the figure, but not labeled, of course, the bypass air inlets of the two positions are not necessarily set at the same time. ). In operation, the rotating shaft 23 drives the fan 42 to force the dust containing hot gas formed by the brush assembly 3 and the commutator assembly 32 in the first cavity 41 (and the gap between the spacer 251 and the brush assembly 3) through the bypass exhaust passage. The 411 enters the third cavity 49. Under the action of the negative pressure, the air in the third cavity 49 filters the dust through the filter member 48 into the second cavity 414, and enters through the radial return passage 412 and the axial return passage 413. The first cavity 41 and the interval between the spacer 251 and the brush assembly 3 circulate in the air flow direction indicated by the arrow in Fig. 1 to achieve the purpose of forced circulation. In the embodiment, the second cavity 414 and the third cavity 49 constitute an air circulation and storage cavity; the fan 42 serves as an air forced convection component. The commutator component 32, The space in which the brush assembly 3 is located (the space including the first cavity 41) and the first air passage communicating with the third cavity 49 are constituted by the bypass exhaust passage 411. The second air passage 414 that communicates the second cavity 414 with the space of the commutator sub-assembly 32 and the brush assembly 3 (including the space of the first cavity 41) via the fan 42 is surrounded by the radial return passage 412 and the shaft. It is constituted by the return passage 41 3 or the like.

The bypass exhaust passage 411 shown in Fig. 2 is disposed on the wall of the outer casing 52, and may be provided with a plurality of bypass exhaust passages 411 spaced around the outer casing 52. In addition, the bypass exhaust passage 411 may also be a separate component disposed between the first bearing 25 and the outer casing 52, sleeved outside the first bearing 25 and mounted on the inner wall of the outer casing 52; and disposed on the outer casing 52 Externally, even a separate pipe leads to the external space. The expansion and deformation of the application of the air circulation system 4 can be implemented with reference to the embodiment of Fig. 1.

The effects similar to those of the embodiment of Fig. 1 can also be formed by the above technical solutions, but the structure of the embodiment is relatively complicated, but the present embodiment is still useful for some specific applications.

Figure 3 provides a partial construction of a third embodiment of a concrete vibrating bar; the difference from the embodiment provided in Figure 1 is that the air forced convection component is improved, and the air compressor 40 acts as an air forced convection component, i.e. 1 provides a fan 42 in an embodiment that is implemented by an air compressor 40 that is secured to the inner wall of the outer casing 52 and that does not contact the commutator assembly 32 on the shaft 23, and that forms a row between the inner walls of the outer casing 52 of the air compressor 40. Air passage 43. The air inlet 402 of the air compressor 40 is located in the return chamber 441 of the air duct assembly 44. The air outlet 401 is located in the first cavity 41, and the airflow is sent to the brush assembly 3 and the commutator assembly 32, forcing the first cavity 41. The dust-laden hot gas enters the gas collecting pipe 443 through the exhaust passage 43, and the air is formed to circulate in the flow direction indicated by the arrow in the figure to achieve the purpose of forced circulation. The air compressor 40 can share power with the motor system 1. Since the air compressor 40 has a strong forced flow of air, a better air circulation effect than the fan 42 can be obtained. Of course, the technical solution of the air compressor 40 can also be used in the technical solution of the embodiment provided in FIG.

The brushed motor provided in Figures 1 - 6 and the brushed motor including the air circulation system 4 can be independently applied, and the casing 52 is equivalent to a common motor casing; it can also be applied to other working environments and equipment requiring an electric motor. on.

Figure 7 is a view showing the working principle of the vibration system of the double-bearing bearing "lifting" eccentric block used in the vibration system of the conventional concrete vibrating bar. The rotor 21 of the motor system 1 disposed in the rod body 21 is supported by the rotating shaft 23 Between the first bearing 25 and the second bearing 142, and ensuring that the rotating shaft 23 is flexibly rotated by the rotor 21; the two ends of the vibrating rotating shaft 13 are respectively supported by the first bearing 141 and the second bearing 142, An eccentric block 110 is fixed to the vibration rotary shaft 13 between the first load bearing 141 and the second load bearing 142, and the vibration rotary shaft 13 is connected to the rotary shaft 23, because the centroid A of the eccentric block 110 deviates from the rotation of the rotary rotary shaft 13 The axis, under the driving of the rotating shaft 23, vibrates the rotating shaft 13 and the eccentric block 110 to rotate at a high speed to generate a centrifugal force f _A , and transmits the centrifugal force to the rod body through the first bearing bearing 141 and the second bearing bearing 142, and the excitation rod body forms a circumferential vibration. , to make the rod body provide exciting force. Due to this "lifting" structure, at least two are required on the one hand (in fact, due to the constraints of the existing bearing technology, the first bearing bearing 141 and the second bearing bearing 142 are respectively composed of a combination of one bearing bearing combination) Symmetrical arrangement on both sides of the eccentric block inevitably results in a large number of components, which occupies a limited space in the rod or causes the rod to be elongated, which also increases the cost. More importantly, in this structure, the centrifugal force f _A is dispersed and applied to the different positions of the outer casing of the rod by the first bearing bearing 141 and the second bearing 142 bearing, which is disadvantageous for forming the circumferential vibration in the ideal model and weakening Exciting force generated by the rod; on the other hand, due to centrifugation Press force f _A vibration load bearing shaft 13 a first 141, a second load force F _u applied to the bearing 142, located eccentric 13- F _u side, causing a first load bearing 141, second bearing 142 load The uneven distribution of force accelerates local wear and shortens the service life of the bearing. In this type of vibration system, some technical solutions additionally provide a bearing for supporting the motor shaft 13, and the bearing is generally omitted by simplifying the structure of the inner member of the rod, and the second bearing bearing 142 supports the shaft 23. In addition, the motor system for powering such a vibration system uses a conventional balance motor whose center of mass is located on the rotation axis of the rotating shaft 23, and the exciting force is simply provided by the centrifugal force generated by the rotation of the eccentric block 110, and the vibration system thereof Complete separation from the motor system that powers it, increasing the size of the device, and also weakening the excitation force of the rod due to the balance of rotational inertia of the motor system.

Based on the vibration system realized by the existing ordinary balanced motor, the applicant has submitted the Chinese patent application successively.

200620136704· 2 (Name: Environmentally-friendly general-purpose motor-quality vibrator), 201210570115· 5 (Name: Motor vibrator) discloses the direct use of the motor by making the rotor of the motor system into an eccentric rotor (the rotor center of mass is offset from the axis of rotation of the rotor) The rotation of the system itself forms a centrifugal force and provides an exciting force to the outside. The corresponding technical solutions are disclosed in the above application, and the description thereof will not be repeated here, and the corresponding brief description will be given only in conjunction with the following embodiments.

Figure 8 provides a schematic diagram of an embodiment of a vibration system used in the present invention, and Figure 10 provides a schematic view of the structure for implementing the same; in this embodiment, the rotor 21 of the motor system is an eccentric rotor located in the second bearing 14 One side, which includes the small mass portion 211 and the large mass portion 212 which are separated from both sides of the rotating shaft 23, so that the center of mass B of the rotor 21 is deviated from the rotation axis of the rotating shaft 23, and centrifugal force is formed when the rotor 21 rotates, thereby constituting the vibration motor. The mass of the rotor 21 is also effectively integrated into the vibration system to effectively enhance the exciting force. A first eccentric block 11 is disposed on the vibrating rotary shaft 13 on the other side of the second bearing 14, and the vibrating rotary shaft 13 is coupled to the rotating shaft 23 and has the same rotational axis, the centroid A of the first eccentric block 11, and the rotor 21 The center of mass B is in the same plane as the above-mentioned axis of rotation, and the centrifugal forces f _A , f _B formed by the centroid A and the centroid _{B are} symmetrically applied to both sides of the second bearing 14 when rotating, forming the second bearing 14 to the outer casing 52 of the rod 5 The applied pressure Ft forms the exciting force provided by the rod 5 to the outside. The structure still constitutes a "pick" type vibration system. When using the vibrating system and the motor system as the vibrating rod, the present invention can be compared with the vibrating rod of the conventional structure, and the quality of the whole machine is the same. Provide greater excitation. In other words, the same exciting force is obtained. Compared with the conventional technical solution, the embodiment requires fewer components and the whole machine can be lighter.

Fig. 9 provides a schematic diagram of another embodiment of a vibration system used in the present invention, and Fig. 11 provides a schematic structural view for realizing the principle thereof. In the vibration system, since the centrifugal force formed by the rotor 21 may be insufficient, it is necessary to dispose the second eccentric block 15 on the side of the rotor 21 to form a stronger centrifugal force. In this embodiment, similar to the embodiment provided in Figures 8 and 10, the first eccentric mass 11 is placed outside the second bearing 14, the second eccentric mass 15 and the eccentric rotor 21 are placed inside the second bearing 14, The centroids A, C, and B are located on the same plane as the axis of rotation of the rotating shaft 23 and the vibrating rotary shaft 13. The centrifugal force f _A and f _e , f _B formed by the rotation thereof are symmetrically applied to the second bearing 14 to form the pressure of the second bearing 14 against the outer casing 52 of the rod 5. The above structure is still a "pick" type vibration system.

In a specific design, the centrifugal force formed on both sides of the second bearing 14 is generally the same or similar to the torque of the second bearing 14, and at the same time, the center of mass B of the eccentric rotor can be brought close to the second bearing 14 to reduce the centrifugal force to the first The influence of the bearing 25. The vibration system of the above structure is used, and the vibration system of the "picking" type structure is placed on both sides of the second bearing 14 (bearing bearing), and the stability is strong and the mechanical strength is high. The pressure exerted by the vibration system on the outer casing 52 of the rod body 5 is concentrated on the second bearing 14 to apply pressure Ft to the outer casing 52, and the centrifugal force generated by the vibration system is effectively utilized to form an ideal circumferential vibration model. The end of the rod 5 is unexcited. The zero vibration point of the vibration force is concentrated on the vibrating head 51 at the tip end of the rod body, and vibrates as a free end of the vibration, thereby effectively enhancing the exciting force of the rod body 5. In the case of satisfying the same exciting force, it saves at least one bearing bearing relative to the traditional "lifting" type, reduces the mass and volume of the eccentric mass, can effectively reduce its possession of the bar space, and can achieve smaller The size of the rod. At the same time, the service life is longer. The motor system using the eccentric rotor further reduces the components in the vibrating bar, reducing the occupation of the space inside the bar, so that the size of the bar can be reduced as needed. It should be noted again that the vibration system of the "type structure" can be directly used to arrange the eccentric blocks on both sides of the second bearing 14, and it is not necessary to use the motor system with the eccentric rotor, and the corresponding technical effects can be achieved.

In order to realize the eccentric rotor described above, the small mass portion 211 and the large mass portion 212 of the rotor may be made of materials having different densities. Or using the following scheme to achieve: Figure 12 provides a schematic diagram of a silicon steel sheet structure for implementing an eccentric rotor core; on the silicon steel sheet, there is a winding slot 2102 of the discharge pivot winding, which is formed by the current in the armature winding The convex portion 2101 of the magnetic pole is formed by punching a plurality of centroid adjusting holes 2103 on the convex portion 2101 forming the small-mass portion 211 of the rotor, thereby realizing the large-volume portion 212 of the silicon steel sheet on the side opposite thereto. Of course, the centroid distribution can also be adjusted by filling the centroid adjusting holes 2103 with materials of different densities, and the formed small mass portion 211 and the large mass portion 212 are not limited to the effects shown in the drawings. Figure 13 provides a schematic view of another rotor structure for implementing an eccentric rotor. In the figure, it is realized by wedges of different densities, and the small-mass portion 211 on the rotor is formed by assembling a low-density wedge 2104 on the winding slots of the rotor. The high-density wedge 2105 is assembled on the winding groove of the rotor to constitute the large-mass portion 212 of the rotor. For example, the high-density wedge 2105 is made of at least one high-density material such as tungsten or lead; the low-density wedge 2104 is made of wood, bamboo, plastic or foamed plastic, low-density foamed metal or low density. Made of low-density materials such as alloys.

Fig. 14 is a view showing the construction of the internal components of the end of the tail pipe system 6. As an application, the second connector 641 and the retainer 642 are used to form the end cap 64 of the above embodiment. The end of the hose 63 is connected to the front end of the hollow second connector 641, and the rear end of the second connector 641 is connected to the retainer 642. The connection mode uses a similar connection between the hose 63 and the first connector 61, except that the second connector 641 is less stressed and can be used without a hose fastener; a threaded connection can also be used. A power cable 74 connected to an external power source passes through the tail pipe system 6 through the end of the retainer 642 and supplies power to the motor system 1. Based on the above structure, the corresponding power supply control system is configured in the tail pipe system 6 as needed. Of course, the power control system can also be placed directly into the duct-type cavity of the tailpipe system 6 of the embodiment provided in Figures 1-3, and the embodiment provided in Figure 14 is an application specific example.

Figure 15 is a block diagram showing an embodiment of a power control system; a power cable 74 connected to an external power source is connected to a memory circuit, a control line 72 of the memory circuit is connected to a sensor, and a motor cable 73 of the memory circuit is connected to the motor system due to The memory circuit can remember and maintain the control signals sent from the sensor, and its operating power can be obtained from the power cable 74. Assuming that the original working state is the power-off state, a control pulse is sent to the memory circuit through the sensor (which can be simply understood as turning the two control lines 72 on), and the memory circuit connects and holds the power cable 74 and the motor cable 73. Powering the motor system, the motor system starts working; when the motor system is to be turned off In the system, a control signal pulse is sent to the memory circuit through the sensor, and the memory circuit disconnects and holds the power cable 74 from the motor cable 73. Thereby, the control of the working state of the motor by the sensor is realized. Referring to Figures 14, 15 , the power controller 7 is placed in the second connector 641, and the motor cable 73 is connected to the motor system through the hose 63 and the duct-type cavity in the first connector 61; A control switch is fixed near the front end of the hose 63 near the connection with the first connector 61 (i.e., the position where the control switch 71 is located in Fig. 2), and the control line 72 is connected to the sensor through the hose 63. In use, the end of the rod 5 or the front end of the hose 63 is used to trigger the sensor before or when the concrete is placed, the vibrating rod starts to work, and the release hose 63 puts the rod 5 into the corresponding position in the concrete for construction; The hose 66 is pulled out and the rod 5 is pulled out. When the rod 5 leaves the concrete or leaves, the sensor is triggered and the vibrating rod stops working. The above work can be operated by one person, and it is convenient and reliable, and is very user-friendly, which is convenient for the use of construction workers.

The sensor may be any one of known vibration sensors, magnetron sensors, and photoelectric sensors. Of course, the touch sensor can also be implemented, but it is generally not used due to the particularity of the construction site. Figure 17 provides a structural schematic diagram of a vibration sensor 711 including an insulative housing 7111, a touch electrode 7114 disposed therein, a conductive elastic member 711 3 - an end connection pendulum 7112, and the other end fixed in insulation The inner wall of the outer casing 7111 is such that the pendulum 7112 can touch the touch electrode 7114 when vibrating, and the elastic member 7113 and the touch electrode 7114 are respectively connected to the control line 72. Fixing the vibration sensor at the position where the control switch 71 shown in FIG. 2 is located, by tapping the outer wall of the tube 63 of the corresponding position, the pendulum 7112 touches the touch electrode 7114 and then under the elastic force of the elastic member 711 3 When reset, the control pulse can be sent to the memory circuit to realize the switching control of the motor system. Of course, if the pendulum 7112 is made of a magnetic material or a ferromagnetic material, it can be used as a magnetron sensor.

As another simple and reliable magnetron sensor, a magnetron is used, and the two poles of the magnetron are connected to the control line 72. The magnetron is operated by a magnet outside the hose 63, and the two poles are in conduction. State, when the magnet is removed, its two poles are in an open working state, thereby achieving control. Fix the magnetron in the position where the control switch 71 shown in Fig. 2 is located. When working, hold a magnet or other magnetic component to slide over or near the outer wall of the hose 63 where the magnetron is located, and then send control to the memory circuit. The signal realizes the switching control of the motor system.

The photosensor can be implemented by using a pendulum similar to that of Figure 17 to block the diaphragm or photodiode. Figure 16 is a block diagram showing an embodiment of another power control system; a push-type memory switch is connected in series with the motor system to the power cable 74, and the push-type memory switch can be a mechanical switch or an electronic memory switch. Its characteristic is that when the switch is pressed once, its working state remains unchanged. It is assumed that the original state of the push-type memory switch is off, when the push-type memory switch button 7125 is pressed, it is in the on state, and is held; when the push-type memory switch button 7125 is pressed again, it is in the off state, and remains . The push-type memory switch can be directly fixed at the position where the control switch 71 shown in Fig. 2 is located, and the button 7125 is directed toward the wall of the hose 63, and a small hole can be opened in the hose 63 for the control button 7125, and Waterproof sealing treatment. Due to the high humidity in the construction environment, this method is inferior in safety. Of course, if the control switch (key switch, knife switch, touch switch, etc.) can be placed at the end of the hose 63 or the tail pipe system 6, but This will result in inconvenient operation during construction. Preferably, based on the push-type memory switch being modified as a switch for tapping vibration control, FIG. 18 provides an improved technical solution thereof. A pressing type memory switch 7124 is disposed in the housing 7121, a vibrating hammer 7122 connected to the returning member 7123 is disposed above the button 7125, and a limiting mechanism is disposed to ensure that the vibrating hammer 7122 can only swing up and down, and the improved control is performed. The switch is fixed in Figure 2 The position of the control switch 71 is shown, by tapping the outer wall of the tube 63 of the corresponding position, the vibrating hammer 7122 can be tapped on the button 7125, and is reset by the action of the returning member 7123, thereby realizing the control of the pressing memory by the vibration mode. switch. Of course, the tapping vibration control switch may further be: a limit moving mechanism is disposed above the button 7125, and the vibrating hammer 7122 is placed in the limit moving mechanism so as to be freely movable up and down along the limit moving mechanism. The button 7125 can be pressed, and when struck, due to the inertia, the vibrating hammer 7122 taps the button 7125 and is naturally reset, thereby realizing the control of the push type memory switch by the vibration mode.

In addition, the above power control system can also be implemented by other well-known control methods, such as a remote control switch system, a voice control system of a specific frequency, and the like.

In the above embodiment, if a brushed DC motor is used and the external power source used is an alternating current, only a bridge rectifier circuit may be connected to the motor cable 73 or the power cable 74 to supply power to the DC motor. The external power supply is DC and can also ensure the operation of the DC motor. The bridge rectifier circuit is placed in the tail pipe system 6, preferably in the second connector 641.

Of course, there are other various embodiments of the present invention, and the related technical solutions in the different embodiments or the different embodiments of the various components may be used alone or recombined without any creative labor. The technical solutions of other specific embodiments are obtained.

The embodiments of the present invention have been described in detail above, and the principles and embodiments of the present invention are described in the following. The related technical solutions of the brushed motor provided in the above technical solutions can be used independently, and can also be used. It is applied to a brush generator. At this time, the commutator is a collector ring (or a brush slip ring) on the generator, and other parts may be identical or partially identical, which is limited to the length and will not be redundant here. The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scopes. In summary, the content of the specification should not be construed as limiting the invention.

Claims

Claim

A brushed motor comprising a stator, a rotating shaft and a rotor fixed on the rotating shaft, wherein the rotating shaft is supported by a bearing, the rotating shaft is provided with a commutator assembly, and a corresponding brush assembly, characterized in that A spacer, the spacer being located between the rotor and the commutator assembly, separating the rotor from the commutator assembly and the brush assembly in two different spaces.

2. The electric motor according to claim 1, wherein the spacer is a first bearing at a rear end of the motor, such that the commutator assembly and the brush assembly are in a space outside the first bearing.

3. The electric motor according to claim 1, wherein a space in which the commutator assembly and the brush assembly are located communicates with a cavity, and the cavity is configured to facilitate operation of the commutator assembly and the brush assembly. An oxidizing environment in which an oxide film is formed.

4. The electric motor according to claim 1, further comprising an air circulation system, the air circulation system being docked with a space in which the commutator assembly and the brush assembly are located; the air circulation system including air forcing Convection components, convection ducts, air-filled air circulation, and storage cavities.

The electric motor according to claim 4, wherein the air forced convection member is an air compressor or a fan; the fan is fixed to the rotating shaft and driven by the rotating shaft.

6. The electric motor according to claim 4, further comprising a filter member disposed in the air circulation and storage cavity, and separating the air circulation and the storage cavity into the first a second cavity, the third cavity; the convection airflow includes a first air passage connecting the space of the commutator assembly and the brush assembly with the third cavity; the forced convection component by the air a second air passage in which the second cavity communicates with the space in which the commutator assembly and the brush assembly are located.

A concrete vibrating bar comprising a rod body, a vibration system provided in the rod body, a motor system for powering the vibration system, and a tail pipe system connected to the rod body, characterized in that the motor The system is the electric motor of claim 1; the tail pipe system has a duct type cavity; and the space in which the commutator assembly and the brush assembly are located communicates with the duct type cavity in the tail pipe system.

The vibrating bar according to claim 7, wherein the vibrating rotary shaft of the vibrating system is coupled to a rotating shaft of the electric motor, and the vibrating rotating shaft passes through the second bearing and is supported by the second bearing An eccentric component is disposed on each side of the second bearing.

9. The vibrating bar according to claim 8, wherein the eccentric member on the outer side of the second bearing is an eccentric block disposed on the vibrating rotary shaft; and a center of mass of the motor rotor is offset from the rotating shaft The axis of rotation forms an eccentric component located inside the second bearing.

10. The vibrating bar according to claim 9, wherein an eccentric mass is disposed on the vibrating rotary shaft on the inner side of the second bearing; a centroid of the two eccentric masses and a centroid of the motor rotor Located on the same side of the axis of rotation.

11. The vibrating rod according to claim 7, further comprising a filter member, a duct assembly and an air forcible convection member, wherein the air forcible convection member is located at the commutator assembly and the brush assembly Between the space and the air duct assembly; the filter member is disposed in the duct type cavity, and the duct type cavity is divided into a second cavity at the front end of the tail pipe system, located behind the tail pipe system a third cavity of the end; the air channel assembly includes a funnel-shaped return cavity at the front end, and a return pipe disposed at a bottom of the return cavity through the air channel assembly and the outside thereof; the opening is disposed in the air duct a collector pipe connected to the front side of the assembly and communicating with the manifold at the rear end of the air duct assembly; the return pipe and the air collecting pipe are alternately disposed on the air duct assembly, passing through the wall of the air duct assembly from different directions but not communicating with each other; The tube is connected to the exhaust pipe, and the exhaust pipe communicates with the third cavity through the filter member; the exhaust pipe and the air duct assembly form a return passage in the duct type cavity of the tail pipe system; The air forcing convection member is disposed at an end of the rod body, and the intermittent between the gas forcing convection member and the rod housing constitutes an exhaust passage; the exhaust passage, the gas collecting pipe, the manifold, and the exhaust pipe are The space of the commutator assembly and the brush assembly is in communication with the third cavity; the return channel, the return pipe, and the return cavity pass through the air forced convection component to space the second cavity with the commutator component and the brush assembly Connected; under the action of the air forced convection component, the dust-containing hot gas in the space where the commutator assembly and the brush assembly are located is dissipated through the third cavity and the second cavity, and the filtering is performed. Filter dust, into the space of the commutator assembly, brush assembly is located again.

The vibrating bar according to any one of claims 7-11, further comprising a power control system disposed in the duct type cavity in the tail pipe system, the power control system and the power cable Connecting and supplying power to the motor system; the power control system includes a control switch or sensor fixed in a duct-type cavity near the front end of the tail pipe system and the rod connecting portion.

The vibrating bar according to claim 12, wherein the power control system comprises a memory circuit and a sensor, wherein the sensor is a magnetron sensor; the memory circuit is connected to a power cable, and the memory circuit passes A control line is coupled to the magnetron sensor, and the memory circuit is coupled to the motor system via a motor cable; the operational state of the magnetron sensor is controlled by sliding a magnetic element external to the tailpipe system.

14. A method for improving the performance of a brushed motor for improving the performance of a brushed motor in a closed environment, characterized in that the commutator assembly and the brush assembly of the motor are moved to a space in which the rotor is located Outside.

15. The method according to claim 14, wherein the commutator assembly and the gas in the space in which the brush assembly is located are circulated and/or filtered to provide the commutator assembly and the brush assembly Suitable working environment.