CN112751444A

CN112751444A - Novel flat single-phase quadrupole series motor

Info

Publication number: CN112751444A
Application number: CN202110030498.6A
Authority: CN
Inventors: 明建勇; 刘圣华
Original assignee: Ningbo Wanjun Motor Co ltd; Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Ningbo Wanjun Motor Co ltd; Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-05-04

Abstract

The invention discloses a novel flat single-phase quadrupole series motor in the technical field of household food mixers, which comprises a brush holder plate, wherein brush assemblies are clamped at four corners of the top of the brush holder plate, the four brush assemblies are distributed on the top of the brush holder plate in a surrounding array manner, the top of the brush holder plate is fixedly connected with four annular partition plates through bolts, and the four annular partition plates are respectively positioned between every two brush assemblies, the novel flat single-phase quadrupole series motor has reasonable structural design, is more favorable for taking away heat generated in the running process of the motor in the running process, fundamentally avoids components in the device from being damaged due to high temperature influence, simultaneously fundamentally breaks off the communication between carbon powder and a rear holder main body, stops forming a conductive path, and effectively avoids the direct contact between an enameled wire and a metal shaft, thereby preventing the high-voltage breakdown phenomenon, and meanwhile, the rotating speed of the motor can be detected.

Description

Novel flat single-phase quadrupole series motor

Technical Field

The invention relates to the technical field of household food mixers, in particular to a novel flat single-phase quadrupole series motor.

Background

As one of common equipment in the kitchen instrument of family, one kind is realized stirring processing to multiple fruit vegetables for smash food repeatedly under the effect of rivers, thereby squeeze out the small-size machine of fresh delicious fruit juice and vegetable juice, adopt brushless DC motor as its main drive arrangement usually, but because brushless DC motor cost is high, be unfavorable for market competition, and single-phase series excitation motor technical maturity, with low costs, easy production is the emerging selection as domestic mixer drive arrangement.

The existing market usually adopts a single-phase four-pole series motor as a driving device of a household food mixer, but the single-phase four-pole series motor has some defects in the actual use process:

1. the motor can generate high temperature in the operation process, but the traditional equipment does not have an effective heat dissipation effect, so that the motor is easily influenced by the high temperature to damage components in the motor, and the service life of the equipment is shortened;

2. carbon powder is generated in the running process of the motor, and is accumulated on the brush holder plate for a long time, so that a conductive path is easily formed between the brush holder plate and the rear support main body made of a metal material, the short circuit phenomenon is generated, and the equipment is damaged;

3. during the winding process, the enameled wire is easy to contact with the metal shaft, so that the defective rate is greatly improved, the short circuit phenomenon is easy to occur due to current breakdown, and the working efficiency of equipment is reduced;

4. traditional motor does not possess the function that detects its rotational speed, leads to the availability factor of equipment to be unable to satisfy the in-service use effect, causes the excessive waste of electric power resource simultaneously.

Therefore, a novel flat single-phase quadrupole series motor is provided.

Disclosure of Invention

The invention aims to provide a novel flat single-phase quadrupole series motor, and aims to solve the problems that high temperature can be generated in the operation process of the motor in the background technology, but the traditional equipment does not have an effective heat dissipation effect, so that the motor is easily influenced by the high temperature to damage internal components, carbon powder can be generated in the operation process of the motor, the carbon powder is accumulated on a brush frame plate for a long time and is easily formed with a conductive path between the motor and a rear bracket main body made of a metal material, a short circuit phenomenon occurs, an enameled wire is easily contacted with a metal shaft in the winding process, so that the current breakdown occurs and the short circuit phenomenon occurs, the traditional motor does not have the function of detecting the rotating speed of the enameled wire, and the use efficiency of the equipment cannot meet the actual use effect.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel flat single-phase quadrupole series excited machine, includes the brush yoke plate, the equal joint in top four corners department of brush yoke plate has the brush subassembly, and four the brush subassembly is surrounding type array distribution the top of brush yoke plate, four annular partition panels of bolt fixedly connected with, and four are passed through at the top of brush yoke plate the annular partition panel is located per two respectively between the brush subassembly.

Further, including stator tooth portion, stator tooth portion evenly distributed is in the inboard of stator chip, stator tooth portion is skew adjacent the brush subassembly obtains the angle and is forty-five degrees, just stator tooth portion's inside wall winding has four stator solenoid, four the stator solenoid is in stator tooth portion's inside forms excitation winding, bolt fixedly connected with mount is passed through to stator tooth portion's bottom.

Furthermore, the outer diameter of the stator chip is 100 mm-119.9 mm.

Further, including ball bearing and rotor tooth portion, rotor tooth portion cup joints stator tooth portion's inside, rotor tooth portion's middle part just is located stator tooth portion's inside is pegged graft and is had the rotor spindle, the equal joint in upper and lower both sides of rotor tooth portion has the insulating end plate of tooth form insulation displacement partition wall, rotor tooth portion's top is fixed at the upside the rotor solenoid has been cup jointed at the top of the insulating end plate of tooth form insulation displacement partition wall, rotor tooth portion's lateral wall a week evenly opens there is the enameled wire mounting groove, and every the enameled wire mounting groove be rotor chip partly, ball bearing cup joints the lateral wall top of rotor spindle.

Furthermore, the outer side wall bottom of the rotor rotating shaft is located at the lower side, and an elastic silica gel shaft sleeve is sleeved inside the insulating end plate with the toothed insulating flat cable partition wall.

Further, the number of the enameled wire mounting grooves is 20.

Furthermore, the outer diameter of the rotor core plate is 60-77 mm.

Furthermore, the height sizes of the stator chip and the rotor chip are both 5-40 mm, and the radial surface angles of the stator chip and the rotor chip are in the same horizontal line.

The stator structure further comprises a fan cover, the fan cover is sleeved outside the stator tooth part and fixed to the bottom of the fixing frame, a fan cover plate is fixedly connected to the bottom of the fan cover through bolts, and the fan cover plate is made of a metal material.

Furthermore, the bottom of the inner cavity of the fan cover is rotatably connected with fan blades, and the type of the fan blades is straight-piece type non-flange fan blades.

Further, including fore-stock main part and after-poppet main part, the fore-stock main part passes through bolt fixed connection and is in the top of stator tooth portion, the after-poppet main part passes through bolt fixed connection and is in the bottom of brush yoke plate, just the fore-stock main part the stator tooth portion with the back-poppet main part between lock spiro union in proper order.

Further, including the rotational speed determine module, the rotational speed determine module passes through bolt fixed connection and is in brush frame plate's bottom, and be located the top of rear bracket main part.

Compared with the prior art, the invention has the beneficial effects that:

1. compared with the traditional equipment, the novel flat single-phase quadrupole series-excited motor has the advantages that the fan cover is additionally arranged on the outer side of the tooth part of the stator, when in operation, the rotor rotating shaft is utilized to drive the fan blades to rotate, the vertical wind pressure of the blades is effectively balanced through the straight-piece type fan blades without flange design, so that the deformation degree of the blades is greatly reduced, an integrated heat dissipation channel for cold air inlet and hot air outlet is formed in the fan cover, and high temperature generated in the stator and the rotor is effectively discharged, so that the equipment is more favorable for taking away heat generated in the operation process of the motor in the operation process, the damage of components in the equipment due to the influence of the high temperature is fundamentally avoided, the service life of the equipment is further prolonged, in addition, the whole material strength of the equipment is effectively improved through the fan cover plate made of metal materials, and the phenomenon of deformation in the operation, the use efficiency is improved.

2. This novel flat single-phase quadrupole series excited machine, top through at the brush yoke board sets up four group's annular partition panels, this equipment is at the operation in-process, when the rotor pivot carries out high-speed rotation and produces the carbon dust between the brush subassembly, under the effect through the centrifugal force, the carbon dust can the adhesion on parts on every side, the distribution of carbon dust intercommunication on the brush yoke board is realized cutting off in the multilayer baffle realization of utilizing annular partition panel, fundamentally prevents to put through between carbon dust and the after-poppet main part, thereby avoid forming the electrically conductive route, and then stop to take place the short circuit phenomenon because of electrically conductive emergence, the security of equipment at the operation in-process has been ensured.

3. The novel flat single-phase quadrupole series motor is characterized in that the upper side and the lower side of a rotor tooth part are respectively provided with a toothed insulating winding displacement partition wall insulating end plate, in the process of winding the rotor tooth part, a rotor enameled wire is forcibly wound on the periphery of the toothed insulating winding displacement partition wall, so that the subsequent height adjustment of a rotor enameled wire by workers is facilitated, copper wires connected with a commutator copper hook in the winding process are distributed in a tooth groove of the toothed insulating winding displacement partition wall, the subsequent wire breakage defective products caused in the process of shaping the rotor enameled wire are effectively prevented, the finished product efficiency of the equipment is ensured, meanwhile, the rotor enameled wire is wound by an elastic silica gel shaft sleeve arranged at the bottom of a rotor rotating shaft, the enameled wire is effectively prevented from being in direct contact with a metal shaft, the phenomenon of voltage breakdown is prevented, and the material characteristics of the insulating end plates of the toothed insulating winding displacement partition wall and the elastic silica gel shaft sleeve are utilized, the risks such as short circuit between the enameled wire and the metal shaft are fundamentally avoided, and the working efficiency of the enameled wire is improved.

4. This novel flat single-phase quadrupole series excited machine, this equipment compare the conventional equipment and increased rotational speed detection subassembly between brush yoke board and after-poppet main part, when the operation, carry out real-time detection through rotational speed detection subassembly to the rotational speed of rotor pivot, make things convenient for the staff to control the rotational speed of this equipment according to the in service behavior, reduced the extravagant degree to the electric power resource in very big degree, simultaneously, adopt the mode of screw fixation to make rotational speed detection subassembly freely dismantle, improved the installation convenience of this equipment.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is a schematic diagram of the main structure of the rear bracket of the present invention;

fig. 4 is an exploded view of a rotor tooth portion of the present invention;

FIG. 5 is a schematic view of a connection structure of a rotor shaft and an elastic silica gel shaft sleeve according to the present invention;

FIG. 6 is a schematic view of the entire structure of the insulating end plate of the toothed insulating flat cable partition according to the present invention;

FIG. 7 is a schematic bottom structure view of the fan housing of the present invention;

FIG. 8 is a schematic view of the overall structure of a fan blade according to the present invention;

fig. 9 is a schematic view of the overall structure of the brush holder plate of the present invention.

In the figure: 100. a front bracket main body; 110. a front bearing seat; 120. the front bracket reinforces the outer ring; 130. a front bracket connecting rod; 140. a front bracket mounting seat; 200. a stator tooth portion; 210. a stator chip; 220. a stator coil; 230. a fixed mount; 300. a ball bearing; 400. a rotor tooth portion; 410. a rotor shaft; 420. a rotor coil; 430. the strip dentate insulating winding displacement partition wall insulating end plate; 440. mounting a enameled wire in a groove; 441. a rotor chip; 450. an elastic silica gel shaft sleeve; 500. a rear bracket main body; 510. a rear bearing seat; 520. the rear bracket reinforces the outer ring; 530. a rear bracket connecting rod; 540. a rear bracket mounting base; 600. a rotational speed detection assembly; 700. a brush holder plate; 710. an electric brush assembly; 720. an annular partition panel; 800. a fan housing; 810. a fan blade; 820. a fan cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a novel flat single-phase quadrupole series-excited motor, which fundamentally avoids components inside the device from being damaged due to high temperature, avoids forming a conductive path and can detect the rotating speed of the motor at the same time, please refer to fig. 1-9, which comprises a brush holder plate 700, wherein four corners of the top of the brush holder plate 700 are respectively clamped with brush assemblies 710, the four brush assemblies 710 are distributed on the top of the brush holder plate 700 in a surrounding type array, the top of the brush holder plate 700 is fixedly connected with four annular partition plates 720 through bolts, and the four annular partition plates 720 are respectively positioned between every two brush assemblies 710.

Fundamentally prevents to contact between carbon dust and the back support main part 500 to avoid forming electrically conductive route, and then stop to take place because of electrically conductive short circuit phenomenon of taking place, ensure the security of this equipment in the operation.

Referring to fig. 1 to 3 again, the stator core includes stator teeth 200, the stator teeth 200 are uniformly distributed on the inner side of the stator core 210, the stator teeth 200 deviate from the adjacent brush assemblies 710 by an angle of forty-five degrees, four stator coils 220 are wound on the inner side wall of the stator teeth 200, the four stator coils 220 form an excitation winding inside the stator teeth 200, and the bottom of the stator teeth 200 is fixedly connected to the fixing frame 230 through bolts.

Preferably, the outer diameter of the stator core piece 210 is 100mm to 119.9 mm.

Referring to fig. 1 and 4-6 again, the structure includes a ball bearing 300 and a rotor tooth portion 400, the rotor tooth portion 400 is sleeved inside the stator tooth portion 200, a rotor rotating shaft 410 is inserted in the middle of the rotor tooth portion 400 and inside the stator tooth portion 200, toothed insulating flat cable partition insulating end plates 430 are clamped on the upper and lower sides of the rotor tooth portion 400, a rotor coil 420 is sleeved on the top of the rotor tooth portion 400 and fixed on the top of the toothed insulating flat cable partition insulating end plate 430 on the upper side, enameled wire mounting grooves 440 are uniformly formed on the outer side wall of the rotor tooth portion 400 in a circle, each enameled wire mounting groove 440 is a part of a rotor chip 441, and the ball bearing 300 is sleeved on the top of the outer side wall of the rotor rotating shaft 410.

Referring to fig. 4-5 again, an elastic silicone bushing 450 is sleeved inside the insulating end plate 430 of the toothed insulating row line partition at the bottom of the outer sidewall of the rotor shaft 410.

Preferably, the number of the wire mounting grooves 440 is 20 grooves.

Preferably, the outer diameter of the rotor core piece 441 is 60mm to 77 mm.

Preferably, the height dimensions of the stator core 210 and the rotor core 441 are both 5 mm-40 mm, and the radial surface angles of the stator core 210 and the rotor core 441 are in the same horizontal line.

The radial diameters of the stator teeth 200 and the rotor teeth 400 are effectively increased, and the axial size of the stator teeth and the rotor teeth is further compressed, so that the device is flatter, and the size of the device is reduced instead of increasing the size of the motor.

Referring to fig. 1 and fig. 7-8 again, the stator structure includes a fan housing 800, the fan housing 800 is sleeved outside the stator teeth 200 and fixed at the bottom of the fixing frame 230, a fan housing cover 820 is fixedly connected to the bottom of the fan housing 800 through bolts, and the fan housing cover 820 is made of a metal material.

Referring to fig. 8 again, the bottom of the inner cavity of the fan housing 800 is rotatably connected with a fan blade 810, and the fan blade 810 is a straight blade type non-flange fan blade.

The stator chip 210 and the rotor chip 441 form an integrated heat dissipation channel for cold air to enter and hot air to exit in the fan housing 800, so that high temperature generated in the stator chip 210 and the rotor chip 441 is effectively discharged, and heat generated in the running process of the motor can be taken away more favorably.

Referring to fig. 1 to 3 again, the brush holder includes a front holder body 100 and a rear holder body 500, the front holder body 100 is fixedly connected to the top of the stator teeth 200 by bolts, the rear holder body 500 is fixedly connected to the bottom of the brush holder plate 700 by bolts, and the front holder body 100, the stator teeth 200 and the rear holder body 500 are sequentially fastened and screwed.

The connection stability of the whole equipment is improved, the equipment is convenient for workers to rapidly detach and install, meanwhile, through the structural design of the front support main body 100 and the rear support main body 500, the heat dissipation space of the equipment is further increased, the heat dissipation performance is improved, the axial height of the whole equipment is compressed, and the whole size of the equipment is further reduced.

Referring to fig. 1 to 3 again, the rotational speed detecting assembly 600 is included, and the rotational speed detecting assembly 600 is fixedly connected to the bottom of the brush holder plate 700 and is located at the top of the rear bracket body 500 through bolts.

The realization detects the operation rotational speed of this equipment, makes things convenient for the staff to control the rotational speed of this equipment according to the in service behavior, has reduced the extravagant degree to power resource to very big degree.

Through practical tests, the performance comparison data of the single-phase two-pole series motor and the single-phase four-pole series motor created by the invention when the same load torsion point (10000RPM/1N.m) is achieved are as follows:

table: and the performance of the single-phase two-pole series motor is compared with that of the single-phase four-pole series motor.

Referring to fig. 1 to 9 again, the front bracket body 100 is fixedly connected to the top of the stator tooth portion 200 by bolts, the front bearing seat 110 is clamped at the center of the top of the front bracket body 100, the top end of the rotor shaft 410 is inserted into the front bearing seat 110, the front bracket reinforcing outer ring 120 is integrally formed around the top of the front bracket body 100, four front bracket connecting rods 130 are integrally formed on the outer side wall of the front bracket body 100 in a surrounding type array, and the front bracket mounting seat 140 is fixedly connected to the insides of the four front bracket connecting rods 130.

Referring to fig. 1 to 9 again, the rear bracket body 500 is fixedly connected to the bottom of the brush holder plate 700 by bolts, the rear bearing seat 510 is fastened to the center of the bottom of the rear bracket body 500, the bottom end of the rotor shaft 410 is inserted into the rear bearing seat 510, a rear bracket reinforcing outer ring 520 is integrally formed on the top of the rear bracket body 500 in a circle, four rear bracket connecting rods 530 are integrally formed on the outer side wall of the rear bracket body 500 in a surrounding type array, and the rear bracket mounting seat 540 is fixedly connected to the inside of the four rear bracket connecting rods 530.

To sum up, the novel flat single-phase quadrupole series-excited motor provided by the invention increases the fan cover 800 at the outer side of the stator chip 210, when in operation, the rotor rotating shaft 410 is utilized to drive the fan blades 810 to rotate, so that the fan cover 800 is internally provided with an integrated heat dissipation channel for cold air inlet and hot air outlet, and high temperature generated in the stator chip 210 and the rotor chip 441 is effectively discharged, so that the equipment is more favorable for taking away heat generated in the operation process of the motor in the operation process, thereby fundamentally avoiding the damage of components in the equipment due to the high temperature, simultaneously, carbon powder is generated due to the high-speed rotation of the rotor rotating shaft 410, under the action of centrifugal force, the carbon powder can be adhered to surrounding components, the multilayer partition plate of the annular partition plate 720 is utilized to realize the partition distribution of the carbon powder communicated on the brush frame plate 700, and fundamentally preventing the communication between the carbon powder and the rear frame main body 500, thereby avoid forming the electrically conductive route, on the other hand, utilize elastic silica gel axle sleeve 450 to carry out the wraparound with the rotor enameled wire to force rotor enameled wire winding displacement in the periphery of taking dentate insulated winding displacement partition wall insulation end plate 430, effectively avoid the enameled wire and rotor pivot 410's direct contact, thereby prevent the withstand voltage breakdown's of electric current phenomenon, set up rotational speed detection subassembly 600 between brush yoke plate 700 and after-poppet main part 500, make things convenient for the staff to control the rotational speed of this equipment according to the in service behavior.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a novel flat single-phase quadrupole series excited machine which characterized in that: including brush carrier plate (700), the equal joint in top four corners department of brush carrier plate (700) has brush subassembly (710), and four brush subassembly (710) are surrounding type array distribution the top of brush carrier plate (700), four annular partition panels (720) of bolt fixedly connected with are passed through to the top of brush carrier plate (700), and four annular partition panel (720) are located per two respectively between brush subassembly (710).

2. The novel flat single-phase quadrupole series-excited machine as claimed in claim 1, wherein: including stator tooth portion (200), stator tooth portion (200) evenly distributed is in the inboard of stator chip (210), stator tooth portion (200) skew is adjacent brush subassembly (710) obtains the angle and is forty-five degrees, just the inside wall winding of stator tooth portion (200) has four stator solenoid (220), four stator solenoid (220) are in the inside of stator tooth portion (200) forms excitation winding, there is mount (230) bottom of stator tooth portion (200) through bolt fixedly connected with.

3. The novel flat single-phase quadrupole series-excited machine according to claim 2, wherein: the outer diameter of the stator core piece (210) is 100-119.9 mm.

4. The novel flat single-phase quadrupole series-excited machine according to claim 2, wherein: including ball bearing (300) and rotor tooth portion (400), rotor tooth portion (400) cup joint the inside of stator tooth portion (200), the middle part of rotor tooth portion (400) just is located the inside of stator tooth portion (200) is pegged graft and is had rotor pivot (410), the equal joint in upper and lower both sides of rotor tooth portion (400) has tooth form insulation displacement partition wall insulation end plate (430), the top of rotor tooth portion (400) is fixed at the upside rotor solenoid (420) have been cup jointed at the top of tooth form insulation displacement partition wall insulation end plate (430), the lateral wall a week of rotor tooth portion (400) has evenly opened enameled wire mounting groove (440), and every enameled wire mounting groove (440) be a part of rotor chip (441), ball bearing (300) cup joint the lateral wall top of rotor pivot (410).

5. The novel flat single-phase quadrupole series-excited machine according to claim 4, wherein: and the bottom of the outer side wall of the rotor rotating shaft (410) is positioned at the lower side, and an elastic silica gel shaft sleeve (450) is sleeved in the insulating end plate (430) with the toothed insulating flat cable partition wall.

6. The novel flat single-phase quadrupole series-excited machine according to claim 4, wherein: the number of the enameled wire mounting grooves (440) is 20.

7. The novel flat single-phase quadrupole series-excited machine according to claim 4, wherein: the outer diameter of the rotor core plate (441) is 60-77 mm.

8. The novel flat single-phase quadrupole series-excited machine according to claim 4, wherein: the height sizes of the stator core plate (210) and the rotor core plate (441) are both 5-40 mm, and the radial surface angles of the stator core plate (210) and the rotor core plate (441) are on the same horizontal line.

9. The novel flat single-phase quadrupole series-excited machine according to claim 2, wherein: the stator structure of the wind turbine comprises a wind cover (800), wherein the wind cover (800) is sleeved outside a stator tooth part (200) and fixed to the bottom of a fixing frame (230), a wind cover plate (820) is fixedly connected to the bottom of the wind cover (800) through bolts, and the wind cover plate (820) is made of a metal material.

10. The novel flat single-phase quadrupole series-excited machine of claim 9, wherein: the fan cover (800) is characterized in that the bottom of an inner cavity of the fan cover (800) is rotatably connected with a fan blade (810), and the fan blade (810) is a straight-piece type non-flange fan blade.

11. The novel flat single-phase quadrupole series-excited machine according to claim 4, wherein: including fore-stock main part (100) and after-poppet main part (500), fore-stock main part (100) pass through bolt fixed connection and are in the top of stator tooth portion (200), after-poppet main part (500) pass through bolt fixed connection and are in the bottom of brush frame board (700), just fore-stock main part (100) stator tooth portion (200) with the lock spiro union in proper order between after-poppet main part (500).

12. The novel flat single-phase quadrupole series-excited machine of claim 11, wherein: including rotational speed detection subassembly (600), rotational speed detection subassembly (600) pass through bolt fixed connection in the bottom of brush frame board (700), and be located the top of back support main part (500).