CN214674624U - Safe food processor - Google Patents

Abstract

The utility model discloses a safe food preparation machine, include the host computer and install in the stirring cup of host computer, the host computer includes the motor, the motor includes by interior and the motor shaft that sets gradually outward, rotor subassembly and stator module, the stirring cup includes by motor shaft driven stirring sword, stator module includes stator core, stator winding and winding support, winding support sets up at stator core along axial both ends, stator winding twines in winding support, stator core has stator yoke portion, stator tooth portion and stator tooth boots, winding support is equipped with outer division board, outer division board is along radially keeping apart between the lateral surface of stator winding and stator tooth boots, the isolation clearance has between the lateral surface of outer division board and stator tooth boots. The utility model provides a food preparation machine can guarantee creepage distance through setting up outer division board, guarantees the security of motor, still makes motor structure tend to the compactness, is favorable to the motor miniaturization and the host computer miniaturization, does benefit to the user and accomodates.

Description

Safe food processor

Technical Field

The utility model relates to a food processing technical field, concretely relates to safe food preparation machine.

Background

At present, the motor used by the food processor mainly comprises a motor shaft, a rotor assembly and a stator assembly which are sequentially arranged from inside to outside, wherein the stator assembly comprises a stator core, a stator winding and a winding support, the winding support is arranged at two ends of the stator core along the axial direction, the stator winding is wound on the winding support, the stator core is provided with a stator yoke part, a stator tooth part and a stator tooth shoe, and generally, a certain distance, namely a creepage distance, is required to be separated between the outer side surface of the stator tooth shoe and the stator winding. The short creepage distance easily causes electric leakage and even safety accidents.

In the prior art, in order to improve the safety performance of the motor, the winding support is provided with a separation plate to prolong the creepage distance, and the separation plate is arranged between the outer side surface of the stator tooth shoe and the stator winding. However, in the conventional motor, the spacer is directly radially abutted against the stator tooth shoes, and therefore, the effect of extending the creepage distance by using the spacer is not satisfactory.

Disclosure of Invention

An object of the utility model is to provide a safe food preparation machine for solve the problem that current food preparation machine security performance is low.

In order to realize the above-mentioned purpose, the utility model provides a safe food preparation machine, include the host computer and install in the stirring cup of host computer, the host computer includes the motor, the motor includes by interior and the motor shaft that sets gradually outward, rotor subassembly and stator module, the stirring cup includes by motor shaft driven stirring sword, stator module includes stator core, stator winding and winding support, the winding support sets up at stator core along axial both ends, stator winding twines in the winding support, stator core has stator yoke portion, stator tooth portion and stator tooth boots, the winding support is equipped with outer division board, outer division board is along radially keeping apart between the lateral surface of stator winding and stator tooth boots, the isolation clearance has between the lateral surface of outer division board and stator tooth boots.

The utility model provides a safe food preparation machine through set up outer division board at the winding support, outer division board is along radially keeping apart between the lateral surface of stator winding and stator tooth boots for creepage distance becomes the curve route by the straight line route, has prolonged creepage distance. An isolation gap is formed between the outer isolation plate and the outer side face of the stator tooth shoe, and the creepage path is further prolonged. Therefore, the utility model discloses can needn't additionally increase motor stator's radial dimension, can guarantee creepage distance on the basis that does not increase the host computer volume, guarantee the security of motor, still make motor structure tend to the compactness, be favorable to motor miniaturization and host computer miniaturization, do benefit to the user and accomodate.

In a preferred embodiment of the safety food processor, the winding carrier is provided with an inner separating plate which is located radially inside the outer separating plate and which abuts against an axial end face of the stator tooth shoes.

The inner isolation plate is abutted against the end face of the stator tooth shoe along the axial direction, so that the end face of the stator tooth shoe is protected, electric leakage accidents are prevented, and the safety performance of the motor is ensured.

In a preferred embodiment of the safety food processor, the winding carrier is provided with an inner separating plate which is located radially inside the outer separating plate and covers the outer side of the stator tooth shoes.

The inner isolation plate covers the outer side face of the stator tooth shoe, the outer side face of the stator tooth shoe is directly protected, and the inner isolation plate and the outer isolation plate form two barriers for isolating between the outer side faces of the stator winding and the stator tooth shoe, so that a creepage path is tortuous, creepage distance is prolonged, and the use safety of the motor is guaranteed.

In a preferred realization of the safe food processor, an isolation groove is formed between the inner and the outer isolation plate.

Compared with the mode that the inner isolation plate is tightly attached to the outer isolation plate, the isolation groove can further lengthen the creepage path.

In a preferred embodiment of the safety food processor, the winding carrier is provided with an inner separating plate which is located radially inside the outer separating plate and which covers the end faces of the stator tooth shoes in the circumferential direction.

The inner isolation plate covers the end face of the stator tooth shoe along the circumferential direction, the end face of the stator tooth shoe is protected, the creepage distance is further lengthened, and the safety performance of the motor is guaranteed.

In a preferred realization of the safety food processor, the top end of the outer barrier is higher than the top end of the stator winding and the bottom end of the outer barrier is lower than the bottom end of the stator winding.

The top that outer division board and stator winding compared is higher, and the bottom is lower, and the high scope of outer division board is greater than the high scope of stator winding to play the effect of protection stator winding, avoid stator winding wearing and tearing in removal or transportation, guarantee the reliability of motor, the life of extension motor.

In a preferred realization of the safe food processor the winding support comprises an upper winding support at the upper end of the stator core and a lower winding support at the lower end of the stator core, one of the upper winding support and the lower winding support being provided with an insert plate, the other one being provided with a slot, the insert plate being inserted into the slot in the axial direction.

The upper winding support and the lower winding support are inserted and fixed through the slots and the plugboards, the assembly is convenient and labor-saving, the assembly time is saved, the assembly efficiency is high, and the structure is stable and reliable. Go up winding support and winding down support and fix a position stator winding, strengthen the structural strength of motor, reduce the vibration noise of motor, improve user experience.

In a preferred embodiment of the safe food processor, the insert plate is located in the separation gap.

The picture peg is arranged in the isolation clearance, not only plays the effect of connection fixation, can also regard as one isolation barrier, prolongs creepage distance, improves the security performance of motor.

In a preferred embodiment of the safety food processor, the winding support has a winding wall located outside the stator winding, the outer side of which is provided with a slot for the retaining wire.

Through setting up the wire winding wall, realized accomodating to the circuit for the circuit is neat, avoid the circuit winding and take place the short circuit phenomenon, improves the security performance of motor. The lateral surface of the winding wall is provided with the wire clamping groove, so that the space utilization is reasonable, the fixing structure of the circuit is reliable, and the wire outlet is convenient.

In a preferred embodiment of the safe food processor, the width b of the stator teeth₁Width b of stator yoke₂B is more than or equal to 1₁/b₂≤2。

The over-high temperature rise caused by the over-high magnetic flux density of the stator yoke part is prevented, the phenomenon that the motor is burnt due to the over-high temperature of the stator winding is avoided, the service life of the motor is guaranteed, and the motor is safe and reliable. And meanwhile, the phenomenon that the rotating speed of the motor is low due to the fact that the magnetic flux density of the stator yoke is too low is prevented. Thus, 1. ltoreq. b₁/b ₂2 or less, the rotating speed of the motor can be guaranteed, and the safety performance of the motor can be guaranteed.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.

Fig. 1 is a schematic structural diagram of a safe food processor according to embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of a host provided in embodiment 1 of the present invention.

Fig. 3 is a cross-sectional view of a motor provided in embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of an upper motor support provided in embodiment 1 of the present invention.

Fig. 5 is a cross-sectional view of the upper motor mount provided in embodiment 1 of the present invention.

Fig. 6 is a schematic structural view of a lower motor support provided in embodiment 1 of the present invention.

Fig. 7 is a schematic structural view of the lower motor support provided in embodiment 1 of the present invention after being inverted.

Fig. 8 is a schematic structural diagram of a rotor assembly provided in embodiment 1 of the present invention.

Fig. 9 is a schematic structural diagram of a rotor core according to embodiment 1 of the present invention.

Fig. 10 is a cross-sectional view of an upper end plate according to embodiment 1 of the present invention.

Fig. 11 is a schematic structural view of an upper end plate according to embodiment 1 of the present invention.

Fig. 12 is a cross-sectional view of a lower end plate according to embodiment 1 of the present invention.

Fig. 13 is a cross-sectional view of a motor according to embodiment 2 of the present invention.

Fig. 14 is a cross-sectional view of a motor according to embodiment 3 of the present invention.

Fig. 15 is a schematic structural view of an end plate according to embodiment 3 of the present invention.

Fig. 16 is a schematic structural diagram of a fan according to embodiment 3 of the present invention.

Fig. 17 is an exploded schematic view of a stator assembly according to embodiment 4 of the present invention.

Fig. 18 is a cross-sectional view of a stator assembly provided in embodiment 4 of the present invention.

Fig. 19 is a schematic structural diagram of a stator assembly according to embodiment 4 of the present invention.

Fig. 20 is a schematic structural diagram of a stator core according to embodiment 4 of the present invention.

Fig. 21 is a schematic structural diagram of an upper winding support provided in embodiment 4 of the present invention.

Fig. 22 is an enlarged schematic view of section a provided in fig. 21.

Fig. 23 is a schematic view of a positional relationship between an inner spacer and a stator tooth shoe according to embodiment 5 of the present invention.

Fig. 24 is a schematic view of a positional relationship between an inner spacer and a stator tooth shoe according to embodiment 6 of the present invention.

Fig. 25 is a sectional view of a motor according to embodiment 7 of the present invention.

Fig. 26 is a top view of a motor shaft according to embodiment 7 of the present invention.

Fig. 27 is a cross-sectional view of a motor shaft according to embodiment 7 of the present invention.

Fig. 28 is a schematic structural view of a boss provided in embodiment 7 of the present invention.

Fig. 29 is a sectional view of a motor according to embodiment 8 of the present invention.

Description of reference numerals: 10-a host machine; 11-a housing; 111-a body; 112-a base; 20-stirring cup; 30-a motor; 31-a motor support; 311-upper motor mount; 3111-step up; 3112-a circumferential limit portion; 3113-framework; 3114-encapsulating; 3115-outlet holes; 312-lower motor mount; 3121-lower step; 3122-vent; 3123-an annular support wall; 313-a via; 314-a coaming; 32-motor shaft; 321-a drain hole; 3211-boss; 322-meshing teeth; 33-a rotor assembly; 331-rotor core; 3311-magnetic shoe mounting groove; 3312-Deweight wells; 3313-magnetic isolation hole; 3314-magnetism isolating groove; 332-magnetic shoe; 333-end plate; 3331-annular step; 3332-balance step; 3333-balance groove; 3334-avoiding the cavity; 3335-first limiting part; 3336-second limiting part; 3337-avoiding groove; 334-limit posts; 3341 upper limiting column; 3342 lower restraining posts; 335-upper end plate; 336-lower end plate; 34-a stator assembly; 341-stator core; 3411-a fixing hole; 3412-a stator yoke; 3413-stator teeth; 3414-stator tooth shoes; 342-a stator winding; 343-winding support; 3431-outer barrier; 3432-inner separator plate; 3433-wire-clamping groove; 3434-winding wall; 40-screws; 41-a threaded hole; 42-punching; 50-sealing ring; 60-a bearing; 61-an upper bearing; 70-a fan; 71-an annular plate; 72-a blade; 73-a substrate; 74-cartridge column.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

Example 1

As shown in fig. 1 and 2, the safe food processor includes a main body 10 and a mixing cup 20 installed on the main body, the main body 10 includes a housing 11 and a motor 30 fixed on the housing, the motor 30 includes a motor bracket 31 and a motor shaft 32, a rotor assembly 33 and a stator assembly 34 sequentially arranged from inside to outside, and the mixing cup 20 includes a mixing blade driven by the motor shaft 32. The stator assembly 34 is fixed to the motor bracket 31, the casing 11 includes a main body 111 and a base 112 fixed to a bottom of the main body, and the main body 111 and the base 112 axially clamp the motor bracket 31.

More preferably, the motor bracket 31 is provided with a radially outwardly protruding holding step, the holding step circumferentially surrounds the motor bracket 31, and the main body 111 and the base 112 hold the holding step.

More specifically, as shown in fig. 3, the motor bracket 31 includes an upper motor bracket 311 and a lower motor bracket 312 that clamp the stator assembly, the clamping steps include an upper step 3111 provided at the upper motor bracket 311 and a lower step 3121 provided at the lower motor bracket 312, the main body 111 is provided with an upper limit structure that presses the upper step, and the base 112 is provided with a lower limit structure that supports the lower step.

It should be noted that the present invention is not limited to the above embodiment, and in fact, in another embodiment, the motor bracket does not need to be provided with a clamping step, and the main body and the base can clamp the upper end face of the upper motor bracket and the lower end face of the lower motor bracket.

As shown in fig. 4, the side wall of the motor holder 31 is of a non-circular structure to form a circumferential stopper 3112, and the main body or the base is engaged with the circumferential stopper 3112. The non-circular structure is a polygonal structure or an elliptical structure.

In order to improve the assembly efficiency, in a next more preferred embodiment of the present embodiment, referring to fig. 2 and 4, a circumferential stopper 3112 is provided on the upper motor holder 311, the main body 111 is engaged with the circumferential stopper 3112, the base is locked to the main body by a fastener (not shown), and the fastener is a screw.

In order to prevent the screw from being exposed to the user's view, the screw is usually locked from the base 112 to the main body 111, which results in the need to pre-fix the motor 30 and the main body 111, cover the base 112 and the main body 111, and finally fix the base 112 and the main body 111 with the screw during the assembly process of the motor. Therefore, through setting up spacing portion 3112 of circumference at last motor support 311, can match well with the main part last motor support 311 earlier, make unable relative rotation between them, realize motor 30 and main part 111 fixed in advance, close the in-process of base 112 at the lid, motor 30 can not make a round trip to rotate, close base 112 back through the screw with base 112 and main part 111 locking after, at the in-process of locking, motor 30 is spacing reliable with main part 111, can not take place to rotate, more convenient assembly, greatly improve assembly efficiency, save the time of assembly.

As shown in fig. 4, the motor bracket is provided with a clamping step, and the projection of the clamping step in the horizontal direction is externally connected to the projection of the circumferential limiting part in the horizontal direction. Specifically, the upper motor support 311 is provided with an upper step 3111 as a part of the clamping step, and a projection of the upper step 3111 in the horizontal direction is circumscribed to a projection of the circumferential limiting portion in the horizontal direction.

With reference to fig. 2 and 4, the lateral portion of the end surface of the upper motor support 311 forms a circumferential limiting portion, the clamping step is located below the circumferential limiting portion, the main body 111 is provided with a sealing ring which is axially abutted against the clamping step, the sealing ring is radially abutted against the circumferential limiting portion, and only one limiting structure is used for limiting the main body and the motor support in radial, circumferential and axial directions, so that the limiting is reliable.

In a preferred embodiment, the top of the main body 111 is provided with an opening for exposing the upper motor support 311, as shown in fig. 5, the upper motor support 311 includes a frame 3113 and an encapsulating layer 3114, and the encapsulating layer 3114 covers the top surface of the frame 3113.

The top of the main body 111 is provided with an opening, and the end surface of the upper motor support 311 is exposed out of the main body, so that the height of the main machine is reduced, the center of gravity of the whole machine is favorably moved downwards, and larger vibration noise is avoided. The framework 3113 enables the upper motor support 311 to maintain sufficient support strength, preferably made of metal, so that the stirring cup is supported by sufficient strength, and the structural stability is ensured; the encapsulating layer 3114 plays buffering, absorbing effect on the one hand, and on the other hand plays insulating effect, avoids the metal to expose and the electric leakage accident that causes, guarantees the safety of using.

Of course, in order to avoid the risk of electric leakage caused by the exposure of the upper motor bracket, in another preferred embodiment, the upper motor bracket is made of plastic, and the motor shaft is exposed from the shaft hole of the upper motor bracket and is provided with a plastic connector.

The utility model discloses do not do the restriction to stator module's fixed mode, for example, in an embodiment, as shown in fig. 3, go up motor support 311 and lower motor support 312 along axial centre gripping stator module 34, stator core 341 of stator module 34 is equipped with fixed orifices 3411, goes up motor support 311 and lower motor support 312 and is equipped with screw hole 41 and perforation 42 respectively, and screw 40 passes perforation 42 and fixed orifices 3411 lock in screw hole 41 in proper order.

In addition, the specific structure of the stator assembly is described in detail in the following embodiments.

Preferably, referring to fig. 3, a wire outlet hole 3115 is formed at a side portion of the upper motor support 311. Avoid interconnecting link winding, guarantee the safety of using.

In a preferred embodiment, referring to fig. 2, the clamping step is provided with a sealing ring 50 cooperating with the body and the seat.

In one embodiment, referring to fig. 2 and 3, the motor shaft 32 is sleeved with a bearing 60 fixed to the motor bracket 31, an axial installation space is formed between the motor bracket 31 and the rotor core 331 of the rotor assembly 33, and the bearing 60 is located in the axial installation space.

In one embodiment, the stator assembly 34 includes a stator core 341 and a stator winding 342 disposed on the stator core 341, the stator core 341 is fixed to the motor bracket 31, the motor bracket 31 is provided with a through hole 313, and the through hole 313 allows the motor shaft 32 to pass through the bearing 60 and then be exposed.

Bearing 60 is located axial installation space, from motor support 31 to inside protrusion, therefore, axial clearance between rotor core and the motor support is by bearing 60 rational utilization, compare in the mode of traditional bearing 60 evagination, the axial height of motor reduces, be favorable to the platyzization of host computer and accomodate, on the basis of bearing 60 inside protrusion, through setting up through-hole 313, make motor shaft 32 can expose, and then make things convenient for the frock centre gripping, carry out the dynamic balance measurement of motor, guarantee the dynamic balance effect of motor, reduce motor vibration noise, improve user experience.

In a preferred embodiment, the end surface of the rotor core 311 is recessed from the end surface formed by the stator winding 342 to form a first portion of the axial installation space, and the bearing 60 is extended into the first portion, that is, the bearing 60 is overlapped with the height of the stator winding, so as to further reduce the height of the motor.

In the embodiment shown in fig. 3, the fan 70 extends into the first portion and the bearing 60 extends into the fan 70. Although the bearing 60 does not coincide with the height of the stator windings 342 in the embodiment shown in fig. 3, in fact, the height of the fan 70 may be adjusted to allow both the fan 70 and the bearing 60 to extend into the first portion, as desired. Thereby achieving better height reducing effect.

In a preferred embodiment, as shown in fig. 3, the upper end of the motor shaft 32 protrudes from the through hole of the upper motor holder 311 for fixing with the stirring blade; the end surface of the lower end of the motor shaft 32 is located in the through hole 313 of the lower motor support 312, i.e., the lower end surface of the motor shaft 32 is flush with or recessed in the bottom end surface of the lower motor support 312.

The terminal surface of motor shaft is arranged in the through-hole, compares in the mode that stretches out the through-hole, has both avoided the increase of motor axial height, can also make motor support 31's terminal surface as the holding surface, more makes things convenient for the fixed cooperation of motor and casing, can make the motor place on a plane steadily.

In a preferred embodiment, as shown in fig. 3, the bore diameter of the through hole 313 is smaller than the outer diameter of the outer ring of the bearing 60.

In a next more preferred embodiment of this embodiment, referring to fig. 3, the motor bracket 31 is provided with a shroud 314 extending toward the rotor assembly 33, the shroud 314 defining a bearing mounting chamber, and an outer race of the bearing being fixed to the shroud 314.

In a preferred embodiment, as shown in fig. 6 and 7, the side wall of the lower motor support 312 is bent from top to bottom toward the center to form a lower step 3121, the stator core 341 overlaps the upper end surface of the lower step, the lower end surface of the lower step overlaps the lower limit structure, and a sealing ring 50 is disposed between the lower step and the lower limit structure.

Preferably, a vent hole is formed in a side wall of the lower motor support 312, and the lower motor support 312 includes an annular support wall 3123 between the lower step 3121 and the vent hole 3122, which blocks inward deformation of the sealing ring 50.

The utility model discloses do not limit to the concrete structure of rotor subassembly, in an embodiment, as shown in FIG. 8, rotor subassembly 33 includes rotor core 331, magnetic shoe 332 and end plate 333, and rotor core 331 is equipped with magnetic shoe mounting groove 3311, and magnetic shoe 332 follows the axial cartridge in magnetic shoe mounting groove 3311, and end plate 333 crimping magnetic shoe 332's terminal surface and rotor core 331's terminal surface.

The end plate 333 can avoid the magnetic shoe 332 from moving axially and separating from the rotor core, and on the other hand, the end plate 333 is in compression joint with the end face of the rotor core 331, so that the overall bonding strength of the rotor assembly is improved, the reliability of the motor is improved, the noise of the motor is reduced, and the user experience is improved.

In one embodiment, the rotor core 331 has a weight-removing hole 3312, the end plate 333 has a pressing surface pressed against the end surface of the magnetic shoe and a stopper 334 inserted into the weight-removing hole 3312, and the stopper 334 cooperates with the weight-removing hole 3312 to rotate the end plate with the rotor core.

The axial limit of the magnetic shoe is strengthened by the pressure joint surface, and the integral bonding strength of the rotor assembly is improved; the spacing post realizes with the cooperation of the weight-removing hole that the circumference of end plate and rotor core is spacing to make the end plate along with rotor core synchronous revolution, avoid the loss of motor energy, further improve the mechanical strength of motor, guarantee motor speed and safe food preparation machine's crushing effect.

In a preferred embodiment, as shown in FIG. 8, the heel of the restraint post 334 is recessed within the crimp surface. The mode helps to realize the clearance of the fillet at the root of the limiting column, reduces the stress of the limiting column and avoids the fracture of the limiting column.

In a preferred embodiment, the end plate covers the magnetic shoe mounting groove.

More preferably, as shown in fig. 9, the shoe installation grooves 3311 include a plurality of segments extending in the circumferential direction of the rotor core and spaced apart from each other, each segment defining a regular polygonal structure, and as shown in fig. 10, the end plate 333 is provided with an annular step 3331 covering each segment.

Further, with reference to FIGS. 9 and 10, the inner diameter D of the annular step₂Inner circle diameter R of regular polygon structure₂Inner circle diameter circumcircle R of regular polygon structure₃Satisfy R₂＜D₂＜R₃。

It should be noted that the present invention is not limited to an embodiment in which the end plate completely covers the magnetic shoe installation groove, and in fact, in another preferred embodiment, as shown in fig. 11, the end plate 333 only partially covers the magnetic shoe installation groove, and in conjunction with fig. 9, the magnetic shoe installation groove 3311 includes a plurality of segments extending along the circumferential direction of the rotor core and spaced apart from each other, and each segment defines a regular polygonal structure, and the inner circle diameter R of the regular polygonal structure₂Outer diameter D of end plate₁Satisfies the condition that D is more than or equal to 1.03₁/R₂Less than or equal to 1.3. In the present embodiment, the bottom surface of the end plate can be directly used as a pressure contact surface, and an annular step is not required.

In a preferred embodiment, referring to fig. 10, the end plate 333 is provided with a balancing step 3332 protruding from the side facing away from the magnetic shoe, and the balancing step 3332 is used for cutting during dynamic balance correction.

Through set up balanced step on the end plate, when carrying out the dynamic balance measurement to the motor, can cut balanced step as required to optimize the dynamic balance of motor, reduce the noise that the motor caused because of the dynamic balance is poor in the course of the work.

Of course, the way of optimizing the dynamic balance of the motor is not limited to the one described above, and in fact, in another preferred embodiment, as shown in fig. 11, the end plates are evenly provided with balance grooves 3333 for accommodating balance mud along the circumferential direction thereof on the side facing away from the rotor core. The balance of the motor is adjusted and optimized by adding balancing mud to the balancing recess 3333.

In a preferred embodiment, as shown in fig. 8, the end plate 333 is provided with an avoidance cavity for the avoidance bearing 60, and in conjunction with fig. 10, the balance step 3332 defines the avoidance cavity 3334.

In a preferred embodiment, as shown in fig. 8, the magnetic shoe mounting groove penetrates in the axial direction of the rotor core to expose the upper end surface and the lower end surface of the magnetic shoe 332, and the end plate 333 includes an upper end plate 335 to be pressed against the upper end surface of the magnetic shoe and a lower end plate 336 to be pressed against the lower end surface of the magnetic shoe.

In a next preferred embodiment of this embodiment, at least one of the upper end plate 335 and the lower end plate 336 is provided with blades to form a fan, and the lower end plate functions as a fan in the embodiment shown in fig. 8. Preferably, a flat gasket is provided between the fan and the bearing to prevent the fan end face from being deformed by the bearing pressure.

The utility model discloses do not injecing the concrete structure of end plate, in order to improve the assembly efficiency of end plate, the end plate structure adopts following arbitrary embodiment:

first embodiment, referring to fig. 8, the outer diameter D of the end plate₁Outer diameter R of rotor core₁Satisfies the following conditions: 0.9R₁≤D₁≤R₁。

In the second embodiment, referring to fig. 9, the rotor core 331 has a plurality of weight-removing holes 3312 uniformly arranged along the circumferential direction thereof.

In the third embodiment, referring to fig. 10 and 12, the end plate 333 includes an upper end plate 335 provided on the upper side of the rotor core and a lower end plate 336 provided on the lower side of the rotor core, the stopper column 334 includes an upper stopper column 3341 provided on the upper end plate and a lower stopper column 3342 provided on the lower end plate, and the upper stopper column 3341 and the lower stopper column 3342 are provided at corresponding positions, have the same shape, and have the same outer diameter.

In the fourth embodiment, the end plate includes an upper end plate 335 disposed on the upper side of the rotor core and a lower end plate 336 disposed on the lower side of the rotor core, the limiting posts include an upper limiting post 3341 disposed on the upper end plate and a lower limiting post 3342 disposed on the lower end plate, the removing-weight holes include an upper removing-weight hole engaged with the upper limiting post and a lower removing-weight hole engaged with the upper removing-weight holeLower limiting columns are matched with the lower counterweight holes. Referring to fig. 8, 10 and 12, the upper limiting column has a length L₁The length of the lower limit column is L₂The length of the upper weight-removing hole is L₃The length of the lower heavy hole is L₄The thickness of the rotor core is L₅In FIG. 8, the upper and lower deduplication holes communicate, L₅=L₃+L₄＞L₁+L₂。

Of course, the upper and lower deduplication holes may not be communicated, and in the non-communicated state, it is preferable that: l is₃＜0.5L₅And L is₄＜0.5L₅。

When any of the four embodiments described above is employed, it contributes to improving the assembly efficiency of the end plate: the first embodiment can facilitate the manual holding and aligning of workers, has the pre-fixing effect, further facilitates the insertion of the limiting column into the weight removing hole, and improves the assembly efficiency; the second embodiment can help to increase the matching probability of the weight-removing hole and the limiting column, and workers do not need to spend much time for alignment during installation, so that the assembly efficiency is improved; in the third embodiment, although the end plate is divided into the upper end plate and the lower end plate, the upper limiting column and the lower limiting column are corresponding in position and have the same shape and outer diameter, so that when the motor is assembled, the step of distinguishing the upper end plate from the lower end plate can be omitted, the upper end plate and the lower end plate can be matched with any end of the rotor core, and the assembly efficiency is improved; the fourth embodiment can avoid the interference between the upper limiting column and the lower limiting column, so that when one end plate is installed, the position of the limiting column of the other end plate does not need to be considered, the independent assembly of each end plate is realized, the assembly time is saved, and the assembly efficiency is high.

Referring to fig. 9, in a preferred embodiment, the shoe mounting grooves 3311 extend in the circumferential direction of the rotor core, and the weight-removing holes 3312 are formed on the line connecting the center of the shoe mounting grooves 3311 and the center of the rotor core 331. The outer side surface of the rotor core 331 is composed of a plurality of arc surfaces, and the magnetic shoe installation grooves 3311 correspond to the arc surfaces one to one. A magnet isolating hole 3313 is arranged between the magnetic shoe mounting groove and the arc surface. Magnetic isolation grooves 3314 are provided at both ends of the magnetic shoe installation groove 3311.

The utility model provides a be equipped with fan 70 in safe food preparation machine, in order to realize the radiating effect, do not restrict about the position of fan, fan 70 sets up inside motor support 31 in this embodiment, as shown in FIG. 3, motor shaft 32 cover is equipped with fan 70, fan 70 includes end plate 336 down and the annular plate 71 of being connected with end plate 336 down, end plate 336 cup joints and is located between rotor core 331 and the bearing 60 with motor shaft 32 down, the one end that end plate 336 was kept away from down to annular plate 71 is connected with the blade 72 with stator winding 342 axial dislocation.

In this embodiment, the fan 70 plays a role in limiting the magnetic shoe as the lower end plate 336, reduces the number of components of the motor, and is beneficial to reducing the size of the whole machine, thereby facilitating the storage of users.

As a more preferred embodiment of the present embodiment, as shown in fig. 3 and 8, the lower end plate 336 and the annular plate 71 define an escape cavity 3334 that accommodates the bearing 60.

As a more preferable embodiment of this embodiment, as shown in FIG. 3, the outer diameter d of the fan₁Inner diameter W of stator winding₁And outer diameter W₂Satisfies W₁≤d₁≤W₂。

As a more preferable embodiment of this embodiment, as shown in FIG. 3, the outer diameter d of the annular plate₂Inner diameter W of stator winding₁D is more than or equal to 0.8₂/W₁＜1。

As a more preferable example of the embodiment, as shown in FIG. 3, the motor bracket 31 includes a lower motor bracket 312 supported below a stator core 341, and an axial distance h between the blades and the stator winding₁Axial distance h from the stator winding to the lower motor support 312₂H is more than or equal to 4₂/h₁≤5。

As a more preferable embodiment of the present invention, as shown in fig. 3 and 8, the motor support 31 includes a lower motor support 312 supported below the stator core 341, the fan is a centrifugal fan, one end of the annular plate 71 away from the lower end plate 336 is provided with a radially extending base plate 73, and the bottom ends of the blades 72 are fixedly connected to the upper end surface of the base plate 73. When the fan rotates, the air is driven to flow in the direction of the arrow shown in fig. 3, so that the heat of the motor is taken away.

Of stator windings with lower motor support 312Axial distance h₂And the sum h of the heights of the base plate and the blades₃H is more than or equal to 2₂/h₃≤3。

Further, referring to fig. 8, the thickness S of the substrate₁And the thickness S of the blade₂Satisfies 1 ≤ S₁/S₂≤2。

In the embodiment, the number of the blades is preferably 5-15, and the reduction of the number of the blades is beneficial to reducing noise, but the air volume is reduced correspondingly. The bending direction of the blades is preferably opposite to the rotating direction of the fan, so that the wind pressure can be effectively reduced, the resistance of the wind flowing in the wind channel is reduced, and the purpose of reducing noise is achieved. The bending curve of the blade adopts an involute design, and aims to ensure that the blade is stressed uniformly in the radial direction, and the fracture risk and shock absorption of the blade are reduced.

Example 2

The safe food processor provided by this embodiment is substantially the same as embodiment 1, except for the location of the fan. As shown in fig. 13, the fan 70 is disposed outside the motor bracket 31: the motor shaft 32 extends from the motor bracket 31 to form a fan mounting section, which is sleeved with a fan 70.

In this embodiment, the fan is an axial fan, and the rotation of the fan will drive the air to flow in the direction of the arrow shown in fig. 13, thereby taking away the heat of the motor.

Example 3

The safe food processor according to the present embodiment is basically the same as embodiment 1, and in the present embodiment, the position where the fan is provided is different from those of embodiments 1 and 2. As shown in fig. 14, 15 and 16, the rotor assembly 33 includes a rotor core 331, a magnetic shoe 332 and an end plate 333, the magnetic shoe 332 is inserted into the rotor core 331 along the axial direction, the end plate 333 is pressed against the end surface of the magnetic shoe to limit the axial direction, and the motor shaft 32 is sleeved with the fan 70. As shown in fig. 15, the end plate 333 is provided with a first stopper portion 3335 that is circumferentially stopped from the rotor core 331 and a second stopper portion 3336 that is circumferentially stopped from the fan 70.

As a more preferable embodiment of the present invention, the density of the rotor core 331 is greater than that of the end plate 333, the rotor core 331 is made of iron, the end plate 333 is made of zinc alloy or aluminum, the rotor core 331 is provided with a weight-removing hole 3312, and the first position-limiting portion 3335 is a position-limiting post inserted into the weight-removing hole 3312.

As a more preferable embodiment of the present embodiment, the density of the end plate 333 is higher than that of the fan 70, the end plate 333 is made of zinc alloy or aluminum, the fan 70 is made of plastic, the insertion posts 74 are provided on the end surface of the fan 70 as shown in fig. 16, and referring to fig. 15, the second stopper portion 3336 is an insertion hole into which the insertion post 74 is inserted. Preferably, the limiting column is arranged separately from the insertion hole.

Of course, it should be noted that the limiting column and the insertion hole of the present invention can be shared, for example, in another preferred embodiment, the first limiting portion is a hollow column, which can be matched with the weight-removing hole of the rotor core and can be inserted into the insertion column of the fan.

As a more preferable embodiment example of the present embodiment, the density of the end plate 333 is greater than that of the fan 70, and the end plate 333 is provided with a balance step for cutting during the dynamic balance correction.

The utility model discloses spacing mode between well end plate and the fan is not restricted to foretell post hole cooperation, still can carry out spacing cooperation for recess, the arch that adopts the non-circular structure.

In a preferred embodiment, the end plate is provided with a groove with a non-circular structure to form the second limiting part, and the end face of the fan extends into the groove to be matched with the groove. The groove is used as a fan accommodating groove and is axially overlapped with the fan, so that the height of the motor is reduced.

Preferably, the end plate is provided with a protrusion and the fan is provided with a recess for the protrusion to extend into. The groove is of a non-circular structure, the protrusion is matched with the non-circular structure to be tightly attached to the side wall of the groove to realize rotation stopping limit, and preferably, the ratio of the depth of the protrusion extending into the groove to the height of the groove is 0.9-1.

Preferably, as shown in fig. 15, the end surface of the end plate 333 is provided with a clearance groove 3337, the first limiting portion 3335 is a limiting column, and the root of the limiting column is located in the clearance groove 3337 and is provided with a round corner. Further, the end surface of the end plate 333 is provided with an annular step for pressure-contacting the magnetic shoe and a mounting step fixed to the motor shaft 32, and the mounting step and the annular step define a clearance groove 3337.

Example 4

The utility model discloses do not restrict stator module's concrete structure, this embodiment is used for explaining a stator module's concrete structure.

As shown in fig. 17, 18, and 19, stator assembly 34 includes stator core 341, stator windings 342, and winding support 343, winding support 343 is provided at both ends of stator core 341 in the axial direction, the stator windings are wound around winding support 343, as shown in fig. 20, stator core 341 has stator yoke portion 3412, stator teeth portion 3413, and stator tooth shoe 3414, winding support 343 is provided with outer partition plate 3431, outer partition plate 3431 is radially partitioned between stator windings 342 and the outer side surface of stator tooth shoe 3414, and partition gap is provided between outer partition plate 3431 and the outer side surface of stator tooth shoe 3414.

The purpose of the stator tooth shoes is to reduce the air gap magnetic resistance between the stator tooth shoes and the rotor core and improve the magnetic field distribution, and the stator winding wound on the stator tooth parts is fixed to prevent the winding from loosening. The distance between adjacent stator tooth shoes is preferably 2-3 mm.

In a preferred embodiment, as shown in fig. 21 and 22, the winding support 343 is provided with an inner partition 3432, the inner partition 3432 being located radially inside the outer partition 3431, the inner partition 3432 abutting against the end face of the stator tooth shoe in the axial direction. Preferably, as shown in fig. 22, an isolation groove is formed between the inner isolation plate 3432 and the outer isolation plate 3431. Preferably, the top ends of the inner and outer partition plates 3432 and 3431 are higher than the top ends of the stator windings 342, and the bottom ends of the outer partition plates 3431 are lower than the bottom ends of the stator windings 342.

As shown in fig. 17 and 19, the winding support 343 includes an upper winding support located at an upper end of the stator core 341 and a lower winding support located at a lower end of the stator core 341, one of the upper winding support and the lower winding support is provided with an insert plate, and the other is provided with an insert slot into which the insert plate is inserted in the axial direction.

Preferably, as shown in fig. 17, the winding support 343 is provided with a winding wall 3434 located outside the stator winding, and an outer side surface of the winding wall 3434 is provided with a wire clamping groove 3433.

Preferably, as shown in fig. 20, the width b of the stator teeth₁And stator yokeWidth b of the section₂B is more than or equal to 1₁/b₂≤2。

Stator tooth width b₁Preferably 6 to 10mm, if b₁Too small, too high a passing magnetic flux density leads to a temperature rise, if b₁Too big, the constant head tank width diminishes, and the space that holds stator winding diminishes, and stator winding is difficult to the heat dissipation.

In this embodiment, the stator assembly is fixed in the same manner as in embodiment 1, with reference to fig. 3, the upper motor bracket 311 and the lower motor bracket 312 axially clamp the stator assembly 34, the stator core 341 of the stator assembly 34 is provided with a fixing hole 3411, the upper motor bracket 311 and the lower motor bracket 312 are respectively provided with a threaded hole 41 and a through hole 42, and the screw 40 sequentially passes through the through hole 42 and the fixing hole 3411 and is locked to the threaded hole 41.

As shown in fig. 20, the position of the fixing hole 3411 on the stator core is preferably set at the joint of the stator tooth and the stator yoke, and the center of the fixing hole is located at the intersection of the stator tooth width bisector and the stator yoke width bisector, in order to avoid uneven temperature rise due to uneven width and to avoid weak points of strength.

Example 5

Unlike embodiment 4, the stator assembly according to this embodiment is configured such that the inner partition plate 3432 covers the outer side surface of the stator tooth shoe 3414, as shown in fig. 23.

Preferably, an isolation groove is formed between the inner isolation plate 3432 and the outer isolation plate 3431.

Example 6

Unlike embodiments 4 and 5, the stator assembly according to this embodiment is configured such that the inner partition plate 3432 covers the end surface of the stator tooth shoe 3414 in the circumferential direction, as shown in fig. 24.

Example 7

The present invention is not limited to the specific structure of the motor shaft 32, and the motor shaft is a solid shaft in embodiments 1 to 6, and in this embodiment, as shown in fig. 25, a drainage hole 321 for communicating the upper end and the lower end of the motor shaft 32 is provided inside the motor shaft 32.

In a preferred embodiment, the motor bracket 31 is provided with a through hole 313, and the through hole 313 communicates with the water discharge hole 321.

The motor shaft sets up the wash port, can prevent motor axial ponding and bearing ponding, and the through-hole communicates with the wash port, realizes the drainage effect, avoids motor support inside ponding down. The through hole can also expose the motor shaft, thereby being convenient for the clamping of the tool to carry out the dynamic balance measurement of the motor

Preferably, the drain hole 321 penetrates along the axis of the motor shaft 32.

Further, as shown in fig. 26, the cross section of the drainage hole 321 is a non-circular structure, and the cross section of the drainage hole shown in fig. 26 is triangular. Of course, the cross section of the drainage hole can be circular, polygonal, spline and the like instead of triangular.

Further, as shown in fig. 27 and 28, a plurality of bosses 3211 are provided on the inner wall of the drain hole in the circumferential direction, and the end surfaces of the bosses 3211 are curved.

The terminal surface of boss is the curved surface, and at the in-process of installation stirring cup, when the boss of stirring sword and wash port touched, a plurality of bosss played the effect of rotatory self-alignment, be favorable to the stirring sword to be pegged graft in the wash port with motor shaft 32 cooperation, do not need the user hard to counterpoint stirring sword and wash port, be favorable to improving user experience.

Example 8

In this embodiment, the matching manner of the motor shaft and the stirring blade is different from that of embodiment 7, as shown in fig. 29, the upper end of the motor shaft 32 is convexly provided with engaging teeth 322, and the lower end of the stirring blade is engaged with the engaging teeth 322.

Preferably, the top surface of the meshing tooth 322 is a rounded chamfer. The addendum face of the meshing teeth 322 is a circular arc chamfer, and in the process of mounting the stirring cup, the stirring cutter is contacted with the meshing teeth 322, so that the motor shaft 32 rotates and is automatically aligned.

Preferably, the bearing 60 includes an upper bearing 61 disposed at the upper end of the motor shaft 32, and the tooth root surface of the engaging tooth 322 is lower than the top surface of the upper bearing 61.

In a preferred embodiment, the lower end of the motor shaft 32 is provided with a fan 70 in an interference fit manner, and the outer side surface of the motor shaft 32 is provided with knurling or flat positions matched with the fan 70.

The motor shaft 32 penetrates out from the bottom end of the fan 70 to form a tool clamping section for dynamic balance measurement, and the tool clamping section is exposed from a through hole of the motor bracket 31. Preferably, the motor shaft extends 5-6mm beyond the fan.

Preferably, the bearing 60 is an oil-impregnated bearing impregnated with a perfume, and has an effect of removing a smell.

In the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship shown in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

The technical solution protected by the present invention is not limited to the above embodiments, and it should be noted that the technical solution of any one embodiment is combined with the technical solution of one or more other embodiments in the protection scope of the present invention. Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The utility model provides a safe food preparation machine, includes the host computer and install in the stirring cup of host computer, the host computer includes the motor, the motor includes motor shaft, rotor subassembly and stator module that from interior to exterior set gradually, the stirring cup include by motor shaft driven stirring sword, stator module includes stator core, stator winding and winding support, the winding support sets up stator core is along axial both ends, stator winding twine in the winding support, stator core has stator yoke portion, stator tooth portion and stator tooth boots, its characterized in that, the winding support is equipped with outer division board, outer division board is along radial isolation stator winding with between the lateral surface of stator tooth boots, outer division board with the isolation clearance has between the lateral surface of stator tooth boots.

2. A safety food processor according to claim 1, wherein the winding frame is provided with an inner spacer, which is located radially inside the outer spacer, the inner spacer abutting against an end face of the stator tooth shoe in the axial direction.

3. A safety food processor as claimed in claim 1, wherein the winding frame is provided with an inner spacer, which is located radially inside the outer spacer, the inner spacer covering the outer side of the stator tooth shoes.

4. A safety food processor as claimed in claim 2 or 3, wherein the inner and outer separating plates define separating slots therebetween.

5. A safety food processor as claimed in claim 1, wherein the winding frame is provided with an inner spacer, which is located radially inside the outer spacer, the inner spacer covering the circumferential end face of the stator tooth shoe.

6. A safety food processor as defined in claim 1, wherein the top end of the outer spacer is higher than the top end of the stator windings and the bottom end of the outer spacer is lower than the bottom end of the stator windings.

7. A safety food processor as defined in claim 1, wherein said winding support comprises an upper winding support at an upper end of said stator core and a lower winding support at a lower end of said stator core, one of said upper winding support and said lower winding support being provided with an insert plate and the other being provided with a slot, said insert plate being axially inserted into said slot.

8. A safety food processor as claimed in claim 7, wherein the insert plate is located in the separation gap.

9. A safety food processor as claimed in claim 1, wherein the winding support is provided with a winding wall on the outside of the stator winding, the winding wall being provided on its outside with snap-in slots.

10. A safety food processor as claimed in claim 1, wherein the width b of the stator teeth is such that₁Width b of the stator yoke₂B is more than or equal to 1₁/b₂≤2。

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