Soybean milk machine

Abstract

The invention discloses a soybean milk machine, belongs to the field of life electric appliances, solves the problems of heavy weight of a series excited motor, many direct current motor parts and loud vibration noise, and adopts the technical scheme that a motor mounting table is integrally cast and molded in a metal lower cover, the motor mounting table is provided with a mounting surface, and an avoiding groove is formed in the inner side wall of the metal lower cover; the smashing motor comprises a silicon steel body and stator windings wound on the two sides of the silicon steel body, the stator windings are installed in the lower metal cover along the receding grooves, the front end face of the silicon steel body is attached to the installation face, and the bottoms of the stator windings are lower than the installation face. The invention is mainly used for effectively reducing the weight of the series motor and avoiding noise aggravation caused by resonance with the metal lower cover, and meanwhile, the assembly process is simplified, and the product percent of pass is improved.

Description

Technical Field

[0001] The invention relates to a household electrical appliance, in particular to a soybean milk maker. Background Art

[0002] A soymilk machine in the prior art includes a machine head and a cup body, wherein the machine head includes an upper cover and a lower cover, and a grinding motor is arranged in the machine head. In the market, a series-excited motor is used as a grinding motor, which can realize both AC and DC. The series-excited motor generally includes a stator, a rotor, a front bracket and a rear bracket, wherein the stator is composed of a salient pole core and an excitation winding, and the rotor is composed of a hidden pole core, an armature winding, a commutator and a rotating shaft, etc. A series circuit is formed between the excitation winding and the armature winding through brushes and a commutator, and even a motor casing is included. For example, CN202798272U discloses a soymilk machine, which includes: a soymilk barrel, a frame buckled on the soymilk barrel, a series-excited motor fixed in the frame, and a motor shaft sealing ring mounted on the motor shaft of the series-excited motor. In combination with Figure 1 and Figure 2 This results in the series motor being larger in size and heavier in weight, which is very inconvenient for elderly or female users to operate and clean. Therefore, the prior art specifically designs and adopts a relatively light DC motor.

[0003] For example, the applicant disclosed a soymilk machine in the prior art CN105433809A, which includes a machine head and a cup body. The machine head includes a machine head upper cover and a machine head lower cover, and the machine head lower cover is a metal lower cover. The machine head lower cover is provided with a stator, a rotor, a rotor shaft, a front bearing and a rear cover assembly. The rotor and the rotor shaft are an integral structure. The stator is fixed to the inner side wall of the machine head lower cover as a whole. The stator is arranged around the rotor, and the front end of the rotor shaft passes through the front end bearing and the shaft hole at the bottom of the machine head lower cover and extends into the cup body. The front end bearing positions the front end of the rotor shaft. The rear cover assembly is sleeved on the rear end of the rotor shaft and positions the rear end of the rotor shaft. The front end bearing and the rear cover assembly are fixed in the machine head. Since the stator, the rotor, the rotor shaft, the front end bearing, the rear end cover assembly and the metal lower cover are an integral structure, compared with the traditional soymilk machine motor housing and the machine head lower cover fixed by screws, the metal lower cover of the prior art also has the function of the motor housing, and the various components of the motor are integrated in the metal lower cover. In this prior art, the soymilk machine has a more compact structure, which not only reduces the number of parts and components, but also reduces the weight of the machine head, and the cost of the whole machine is also lower. Since the metal lower cover has good thermal conductivity, the friction heat generated by the high-speed rotation of the rotor shaft can be directly transferred to the outside of the machine head through the metal lower cover, which can greatly reduce the heat in the machine head and the temperature rise of the motor, which not only improves the safety performance of the whole machine, but also greatly prolongs the service life of the motor. In this prior art, if the stator adopts a coil winding, the coil winding needs to be wound on an annular mounting frame, and then the annular mounting frame is fixed to the inner wall of the metal lower cover. However, in the above-mentioned prior art, the stator, rotor, rotor shaft, front bearing, rear cover assembly and metal lower cover actually constitute a DC motor. In addition to using the metal lower cover as the motor housing, the metal lower cover is also required to serve as the front cover of the motor, which is essentially different from the series-excited motor. The structure is still relatively complex. Not only are there many assembly processes, which leads to increased production costs, but the metal lower cover is generally formed by stamping stainless steel, and the thickness is relatively thin, generally not exceeding 1.5mm, and the strength is relatively general. The ability to resist deformation in the radial direction is weak. Since the annular mounting frame is fixed on the inner wall of the metal lower cover, it is easy to have radial resonance due to the vibration caused by the high-speed rotation of the rotor, resulting in aggravated vibration and more noise. In addition, the specific position of the annular mounting frame fixed on the inner wall of the metal lower cover is difficult to grasp. When workers install the annular mounting frame, they cannot accurately locate the position of the annular mounting frame in the height direction of the metal lower cover, resulting in the coil winding being easily damaged by extrusion or impact during the assembly process, such as the insulation layer being broken, which further leads to a higher product failure rate. Summary of the invention

[0004] The purpose of the present invention is to provide a soymilk machine, which adopts a series-excited motor without a front bracket as a grinding motor fixed together with a metal lower cover, so as to solve the problems of heavy weight of the series-excited motor, many parts of the DC motor and high vibration noise, effectively reduce the weight of the series-excited motor and avoid resonance with the metal lower cover to increase noise, and at the same time simplify the assembly process, which is conducive to improving the product qualification rate.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a soymilk machine, including a machine head and a cup body, the machine head including an upper cover and a metal lower cover, a grinding motor is arranged in the machine head, a motor mounting platform is integrally cast in the metal lower cover, the motor mounting platform has a mounting surface, an inner side wall of the metal lower cover is provided with an avoidance groove, the grinding motor includes a silicon steel body and a stator winding wound on both sides of the silicon steel body, the stator winding is installed into the metal lower cover along the avoidance groove, so that the front end surface of the silicon steel body is in contact with the mounting surface and the bottom of the stator winding is lower than the mounting surface.

[0006] After adopting the above technical scheme, the present invention has the following advantages: since the crushing motor adopts a design without a front bracket, the metal lower cover and the motor mounting platform adopt an integrated casting process, so that the silicon steel body and the metal lower cover can be reliably installed and fixed as a whole, which can greatly reduce the weight of the machine head, thereby improving the convenience of users when operating and cleaning the machine head, and is more friendly to the elderly or female users; at the same time, compared with the stainless steel stamping process used in the prior art, the casting process not only improves the overall strength of the metal lower cover, but also has better radial deformation resistance, and the motor mounting platform is equivalent to adding an integrated reinforcing rib inside the metal lower cover, which can further improve The structural strength of the high metal lower cover can effectively prevent the vibration generated by the operation of the crushing motor from causing the metal lower cover to produce radial resonance, thereby effectively preventing the noise from increasing; on this basis, the motor mounting table has a mounting surface, and the inner wall of the metal lower cover is provided with an avoidance groove, and the stator winding is installed in the metal lower cover along the avoidance groove, so that it is not easy to be damaged by the impact of the metal lower cover during the assembly process. At the same time, after the assembly is in place, the front end face of the silicon steel body fits the mounting surface, and the silicon steel body can be axially positioned through the mounting surface to ensure that the bottom of the stator winding does not contact the inner wall of the avoidance groove, that is, the stator winding does not contact the metal lower cover, and naturally will not be squeezed, and will not be damaged, which is conducive to improving the qualified rate of the product. The front end face of the silicon steel body fits the mounting surface, and the heat generated by the operation of the crushing motor can be transferred to the metal lower cover, thereby effectively reducing the temperature rise rate of the silicon steel body, and at the same time, it is conducive to heat dissipation through the motor mounting table and the metal lower cover after the temperature of the silicon steel body is stable, thereby reducing the working temperature of the silicon steel body, which is conducive to the stable and reliable operation of the crushing motor. Furthermore, because the metal lower cover and the motor mounting platform are integrally cast, compared with the motor bracket in the prior art, the motor mounting platform does not need to be assembled, which can improve the assembly efficiency of the machine head, and the metal lower cover is made of the same metal material, which has a good heat conduction effect and is also conducive to the heat dissipation of the silicon steel body. In addition, the silicon steel body is directly fixed in the metal lower cover, and the crushing motor does not need a motor housing and a front bracket, which not only saves the cost of parts, but also simplifies the assembly process, can further improve the assembly efficiency, and is also conducive to improving the product qualification rate.

[0007] Furthermore, the avoidance groove and the motor mounting platform are arranged in pairs, and the avoidance groove and the motor mounting platform are arranged at intervals from each other in the circumferential direction of the crushing motor. The avoidance groove can effectively reduce the stress concentration problem caused by the integral casting of the metal lower cover and the motor mounting platform, thereby improving the service life of the metal lower cover. At the same time, since the motor mounting platform and the avoidance groove are staggered, during assembly, workers can more easily observe the position of the avoidance groove, thereby ensuring that the bottom of the stator winding will not contact the motor mounting platform and the metal lower cover when it extends into the avoidance groove, which is further conducive to improving the qualified rate.

[0008] Furthermore, the metal lower cover is provided with a receiving groove located below the mounting surface, and the receiving groove is connected to the avoidance groove. The stator winding is installed into the metal lower cover along the avoidance groove and then rotated, so that the bottom of the stator winding is accommodated in the receiving groove. Providing the receiving groove below the mounting surface is equivalent to opening a groove in the motor mounting table, which is also conducive to releasing the stress generated by casting. In addition, in order to allow the silicon steel body to rotate in the metal lower cover, an annular gap is formed between the outer periphery of the silicon steel body and the inner side wall of the metal lower cover, and air convection can be used to dissipate heat from the silicon steel body, the stator winding and the rotor. After the bottom of the stator winding is accommodated in the receiving groove, a relatively stable working space is formed, which is conducive to the long-term stable operation of the crushing motor.

[0009] Furthermore, the rear end of the silicon steel body is provided with a rear bracket, which is fixedly connected to the machine head and makes the front end surface of the silicon steel body close to the mounting surface, and the rear end of the rotating shaft of the grinding motor is positioned on the rear bracket. The silicon steel body can thus obtain a better heat conduction effect, which is beneficial to the heat dissipation of the silicon steel body.

[0010] Furthermore, the silicon steel body is provided with an axially penetrating connecting through hole, the motor mounting platform is provided with a connecting hole, and the rear bracket is provided with a fastener, and the fastener passes through the connecting through hole and cooperates with the connecting hole to fix the rear bracket, the silicon steel body and the metal lower cover;

[0011] Alternatively, a fixing platform is provided inside the metal lower cover, the front end of the rear bracket abuts against the silicon steel body, and the rear bracket is fixedly connected to the fixing platform to press and fix the silicon steel body;

[0012] Alternatively, the front end of the rear bracket abuts against the silicon steel body, the upper cover is provided with an upper support body, and the upper support body abuts against the rear bracket to press and fix the silicon steel body.

[0013] Furthermore, the inner side wall of the metal lower cover is provided with a limiting surface that contacts and fits with the outer side surface of the silicon steel body, and the limiting surface is located above the mounting surface or is offset from the mounting surface in the circumferential direction of the metal lower cover. The limiting surface can add circumferential limitation to the silicon steel body to prevent the silicon steel body from moving in the radial and circumferential directions. The limiting surface can also increase the contact area between the silicon steel body and the metal lower cover, which is beneficial for the silicon steel body to conduct heat and dissipate heat to the metal lower cover. In one embodiment, the limiting surface can be designed to be located above the mounting surface, so that the avoidance groove can have sufficient height, which is beneficial for the stator winding to follow the silicon steel body to be more smoothly installed into the metal lower cover. In another embodiment, the limiting surface and the mounting surface may be staggered in the circumferential direction of the metal lower cover, that is, the two limiting surfaces are located on opposite sides of the silicon steel body, clamping the silicon steel body to generate mutually balanced forces, so that the silicon steel body obtains a stable circumferential limiting effect, and the axial force of the mounting surface on the silicon steel body and the radial force of the limiting surface on the silicon steel body are more evenly distributed, so that the silicon steel body obtains a more stable fixing effect and can be better integrated with the metal lower cover, which can not only reduce noise but also improve the heat dissipation effect of the silicon steel body.

[0014] Furthermore, a heat dissipation gap connected to the avoidance groove is provided between the front end surface of the silicon steel body and the metal lower cover. The space above the pulverizing motor forms a circulation channel through the avoidance groove and the heat dissipation gap, and the air flows in the circulation channel to dissipate the heat of the pulverizing motor by heat radiation and heat convection, which can also improve the heat dissipation effect of the pulverizing motor.

[0015] Furthermore, an axial hole is provided at the bottom end of the metal lower cover, the rotating shaft of the crushing motor passes through the axial hole and extends out of the metal lower cover and is equipped with a crushing tool, and a shaft sealing assembly is provided at the axial hole to cooperate with the rotating shaft and position the rotating shaft.

[0016] Furthermore, the inner bottom surface of the metal lower cover is integrally cast with a positioning ring surrounding the shaft hole, and the shaft seal assembly is installed in the positioning ring. The positioning ring can reliably position the shaft seal assembly without further increasing the weight of the metal lower cover.

[0017] Furthermore, the outer peripheral side of the positioning ring is integrally cast with supporting ribs, which are connected to the inner side of the metal lower cover and / or the motor mounting platform. The supporting ribs can further improve the structural strength of the positioning ring and the bottom surface of the metal lower cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is an exploded view of a head of a soymilk machine of the present invention (I);

[0020] Figure 2 A cross-sectional view of a head of a soymilk maker according to the present invention (I);

[0021] Figure 3 It is a top view schematic diagram of a metal lower cover in a soymilk machine of the present invention;

[0022] Figure 4 It is a cross-sectional view of a head of a soymilk machine of the present invention (II);

[0023] Figure 5 This is an exploded view of a machine head in a soymilk machine of the present invention (II);

[0024] Figure 6 It is a top view schematic diagram of the assembly of a silicon steel body and a metal lower cover in a soymilk machine of the present invention;

[0025] Figure 7 It is a cross-sectional view of the assembly of a silicon steel body and a metal lower cover in a soymilk machine of the present invention;

[0026] Figure 8 A cross-sectional view of a head of a soymilk machine according to the present invention (III);

[0027] Fig. 9 This is a cross-sectional view (IV) of a soymilk machine head of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] The terms "first", "second", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish before a certain technical feature, it does not necessarily indicate that "first" is present. It should be understood that in the present invention, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present invention, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "Containing X, Y and Z", "Containing X, Y, Z" means that X, Y, and Z are all included, "Containing X, Y or Z" means that one of X, Y, and Z is included, and "Containing X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0030] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0031] The present invention provides a soymilk machine, comprising a machine head 100 and a cup body, such as Figures 1 to 5 As shown, the machine head 100 includes an upper cover 11 and a metal lower cover 12, a crushing motor is arranged in the machine head 100, a motor mounting platform 121 is integrally cast in the metal lower cover 12, the motor mounting platform 121 has a mounting surface 1211, an inner side wall of the metal lower cover is provided with an avoidance groove 122, the crushing motor includes a silicon steel body 21 and a stator winding 22 wound on both sides of the silicon steel body 21, the stator winding 22 is installed into the metal lower cover 12 along the avoidance groove 122, so that the front end surface of the silicon steel body 21 is in contact with the mounting surface 1211 and the bottom of the stator winding 22 is lower than the mounting surface 1211.

[0032] In the present invention, since the crushing motor adopts a design without a front bracket, the metal lower cover 12 and the motor mounting platform 121 adopt an integrated casting process, so that the silicon steel body and the metal lower cover 12 can be reliably installed and fixed as a whole, which can greatly reduce the weight of the machine head, thereby improving the convenience of users when operating and cleaning the machine head, and is more user-friendly for the elderly or female users; at the same time, compared with the stainless steel stamping process in the prior art, the casting process not only improves the overall strength of the metal lower cover 12, but also has better radial deformation resistance, and the motor mounting platform 121 is equivalent to adding an integrated reinforcing rib inside the metal lower cover 12, which can further improve the metal lower cover 12. The structural strength of the motor can effectively avoid the vibration generated by the operation of the crushing motor, which can cause the metal lower cover 12 to produce radial resonance, thereby effectively avoiding the increase of noise; on this basis, the motor mounting platform 121 has a mounting surface, and the inner wall of the metal lower cover 12 is provided with an avoidance groove. The stator winding is installed in the metal lower cover 12 along the avoidance groove, and is not easily damaged by the impact of the metal lower cover 12 during the assembly process. At the same time, after being assembled in place, the front end surface of the silicon steel body fits the mounting surface, and the silicon steel body can be axially positioned by the mounting surface to ensure that the bottom of the stator winding does not contact the inner wall of the avoidance groove, that is, the stator winding does not contact the metal lower cover 12, and naturally will not be squeezed, and will not be damaged, which is conducive to improving the qualified rate of the product. The front end surface of the silicon steel body fits the mounting surface, and the heat generated by the operation of the crushing motor can be transferred to the metal lower cover 12, thereby effectively reducing the temperature rise rate of the silicon steel body, and at the same time, it is conducive to heat dissipation through the motor mounting platform 121 and the metal lower cover 12 after the temperature of the silicon steel body is stable, reducing the working temperature of the silicon steel body, which is conducive to the stable and reliable operation of the crushing motor. Furthermore, because the metal lower cover 12 and the motor mounting platform 121 are integrally cast, compared with the motor bracket in the prior art, the motor mounting platform 121 does not need to be assembled, which can improve the assembly efficiency of the machine head. Moreover, the motor mounting platform 121 is made of the same metal material as the metal lower cover 12, which has a good heat conduction effect and is also beneficial to the heat dissipation of the silicon steel body. In addition, the silicon steel body is directly fixed in the metal lower cover 12, and the crushing motor does not need a motor housing and a front bracket, which not only saves the cost of parts, but also simplifies the assembly process, can further improve the assembly efficiency, and is also beneficial to improving the product qualification rate. In order to reduce the weight of the metal lower cover 12, the motor mounting platform 121 can adopt a hollow structure, such as Figure 3 As shown, in order to increase the contact area between the mounting surface 1211 and the silicon steel body 21, the motor mounting platform 121 can be a block structure, such as Figure 5 As shown, both options are available.

[0033] In one embodiment, the avoidance groove 122 and the motor mounting platform 121 are arranged in pairs, and the avoidance groove 122 and the motor mounting platform 121 are arranged at intervals from each other in the circumferential direction of the crushing motor, so the avoidance groove 122 can effectively reduce the stress concentration problem caused by the integral casting of the metal lower cover 12 and the motor mounting platform 121, thereby improving the service life of the metal lower cover 12. At the same time, since the motor mounting platform 121 and the avoidance groove 122 are staggered, during assembly, workers can more easily observe the position of the avoidance groove 122, thereby ensuring that the bottom of the stator winding 22 will not contact the motor mounting platform 121 and the metal lower cover 12 when it extends into the avoidance groove 122, which is further conducive to improving the qualified rate. On this basis, in another embodiment, the avoidance groove 122 can be extended to below the mounting surface 1211, and the stator winding 22 can be rotated along the avoidance groove 122 and installed into the metal lower cover 12, which is equivalent to opening a groove in the motor mounting platform, and is also conducive to releasing the stress generated by casting. In order to allow the silicon steel body to rotate in the metal lower cover, an annular gap is formed between the outer periphery of the silicon steel body and the inner side wall of the metal lower cover, and air convection can be used to dissipate heat from the silicon steel body, the stator winding and the rotor. After the bottom of the stator winding is accommodated in the accommodating groove, a relatively stable working space is formed, which is conducive to the long-term stable operation of the crushing motor. Since the accommodating groove will assist in limiting the bottom of the stator winding, the possibility of the crushing motor completely falling off from the metal lower cover is reduced, and the reliability of the crushing motor installation and the compactness of the structure are improved.

[0034] The silicon steel body 21 can be directly fixed to the metal lower cover 12 as a whole. In order to further reliably fix the silicon steel body 21, in one embodiment, a rear bracket 31 can be provided at the rear end of the silicon steel body 21, and the rear bracket 31 is fixedly connected to the head 100 and makes the front end surface of the silicon steel body 21 close to the mounting surface 1211, so that a better heat conduction effect can be obtained, which is beneficial to the heat dissipation of the silicon steel body 21. At the same time, in order to allow the rear end of the rotating shaft 23 to obtain a stable positioning, the rear end of the rotating shaft 23 of the grinding motor can be positioned on the rear bracket 31. Specifically, a rear bearing 32 can be provided on the rear bracket 31, and the rear end of the rotating shaft 23 is assembled with the rear bearing 32 to achieve positioning. When a brushed motor is used, the carbon brush 33 can also be provided on the rear bracket 31, and the commutator 24 is correspondingly provided on the rotating shaft 23.

[0035] There are many ways to fix the rear support 31 to the head 100, for example Figure 2 As shown in , the silicon steel body 21 is provided with an axially penetrating connecting through hole 211, the motor mounting platform 121 is provided with a connecting hole 1212, and the rear bracket 31 is provided with a fastener 34. The fastener 34 passes through the connecting through hole 211 and cooperates with the connecting hole 1212 to fix the rear bracket 31, the silicon steel body 21 and the metal lower cover 12. The fastener 34 can be selected from long screws, etc. It can also be as Figure 8As shown, a fixing platform 123 is selected to be provided in the metal lower cover 12, and the front end of the rear bracket 31 abuts against the silicon steel body 21. The rear bracket 31 is fixedly connected with the fixing platform 123 to press and fix the silicon steel body 21. Of course, the rear bracket 31 does not directly contact the silicon steel body 21, but indirectly axially positions the silicon steel body 21 by utilizing the matching relationship of the rear bearing axially positioned on the rotating shaft. In addition to being connected with the metal lower cover 12, in another embodiment, the upper cover 11 can also be used to improve the reliability of fixing the silicon steel body 21, see Fig. 9 The front end of the rear bracket 31 abuts against the silicon steel body 21, and the upper cover 11 is provided with an upper support body 111, which abuts against the rear bracket 31 to press and fix the silicon steel body 21. In the above scheme, the rear bracket 31 is pressed on the silicon steel body 21, which is more convenient to install.

[0036] In addition to axially fixing the silicon steel body 21, a circumferential limiter may be added to prevent the silicon steel body 21 from moving in the radial and circumferential directions. For example, a limiter surface 124 that contacts and fits with the outer side surface of the silicon steel body 21 may be provided on the inner side wall of the metal lower cover 12. Figure 6 As shown, the two limiting surfaces 124 are located on opposite sides of the silicon steel body 21, clamping the silicon steel body 21 to generate mutually balanced forces, so that the silicon steel body 21 can obtain a stable circumferential limiting effect. The limiting surfaces 124 can also increase the contact area between the silicon steel body 21 and the metal lower cover 12, which is beneficial for the silicon steel body 21 to conduct heat and dissipate heat to the metal lower cover 12. In one embodiment, the limiting surface 124 can be designed to be located above the mounting surface 1211, so that the avoidance groove 122 can have a sufficient height, which is beneficial for the stator winding 22 to follow the silicon steel body 21 and be more smoothly installed into the metal lower cover 12. In another embodiment, the limiting surface 124 and the mounting surface 1211 can also be staggered in the circumferential direction of the metal lower cover 12, so that the axial force of the mounting surface 1211 on the silicon steel body 21 and the radial force of the limiting surface 124 on the silicon steel body 21 are more evenly distributed, or the number of limiting surfaces 124 can be increased, such as Figure 7 As shown, limiting surfaces 124 are provided above the mounting surface 1211 and the avoidance groove 122, so that the silicon steel body 21 can obtain a more stable fixing effect and can be better integrated with the metal lower cover 12, which can not only reduce noise but also improve the heat dissipation effect of the silicon steel body 21.

[0037] In addition to heat dissipation by heat conduction, a heat dissipation gap 125 connected to the avoidance groove 122 can be provided between the front end surface of the silicon steel body 21 and the metal lower cover 12. The space above the grinding motor forms a circulation channel through the avoidance groove 122 and the heat dissipation gap 125. The air flows in the circulation channel to dissipate the heat of the grinding motor by heat radiation and heat convection, which can also improve the heat dissipation effect of the grinding motor.

[0038] The bottom end of the metal lower cover 12 is provided with an axial hole 126. The rotating shaft 23 of the crushing motor passes through the axial hole 126 and extends out of the metal lower cover 12 and is installed with a crushing cutter 25. The axial hole 126 is provided with a shaft seal assembly 129 that cooperates with the rotating shaft 23 and positions the rotating shaft 23. Considering that the rotating shaft 23 will rotate at a high speed, in order to reliably position the shaft seal assembly 129 without further increasing the weight of the metal lower cover 12, a positioning ring 127 surrounding the axial hole 126 can be integrally cast on the inner bottom surface of the metal lower cover 12, and the shaft seal assembly 129 is installed in the positioning ring 127. In order to further improve the structural strength of the positioning ring 127, a supporting rib 128 can be integrally cast on the outer peripheral side of the positioning ring 127, and the supporting rib 128 is connected to the inner side of the metal lower cover 12 and / or the motor mounting platform 121. The supporting rib 128 can avoid the avoidance groove 122, thereby avoiding contact with the bottom of the stator winding 22. The support ribs can further improve the structural strength of the positioning ring and can also improve the structural strength of the bottom surface of the metal lower cover.

[0039] The shaft seal assembly 129 generally includes a front bearing 1291 and a shaft seal 1292. The front bearing 1291 is pressed on the shaft seal 1292 so that the shaft seal 1292 is axially positioned at the shaft hole 126. The front end of the rotating shaft 23 is assembled with the front bearing 1291 to obtain positioning. In order to axially position the front bearing 1291, an axial positioning member for axially positioning the shaft seal assembly 129 at the shaft hole 126 may be provided on the rotating shaft 23. The axial positioning member may be selected in various forms, such as Figure 2 As shown in , the axial positioning member adopts a shaft retaining spring 26, and the shaft retaining spring 26 is against the rear end of the front bearing 1291. Figure 4 As shown in , the axial positioning member is a sleeve 27, which is mounted on the rotating shaft 23, and the front end of the sleeve 27 is against the rear end of the front bearing 1291, which will not be listed here.

[0040] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A soymilk machine, comprising a machine head and a cup body, wherein the machine head comprises an upper cover and a metal lower cover, and a grinding motor is arranged in the machine head, characterized in that: A motor mounting platform is integrally cast inside the metal lower cover, and the motor mounting platform has a mounting surface. An avoidance groove is provided on the inner side wall of the metal lower cover. The crushing motor includes a silicon steel body and a stator winding wound on both sides of the silicon steel body. The stator winding is installed into the metal lower cover along the avoidance groove so that the front end surface of the silicon steel body fits the mounting surface and the bottom of the stator winding is lower than the mounting surface.

2. The soymilk machine according to claim 1, characterized in that: The avoidance groove and the motor mounting platform are respectively arranged in pairs, and the avoidance groove and the motor mounting platform are arranged at intervals from each other in the circumferential direction of the grinding motor.

3. The soymilk machine according to claim 1, characterized in that: The metal lower cover is provided with a receiving groove below the mounting surface, the receiving groove is communicated with the avoidance groove, and the stator winding is installed into the metal lower cover along the avoidance groove and then rotated, so that the bottom of the stator winding is received in the receiving groove.

4. The soymilk machine according to claim 1, characterized in that: The rear end of the silicon steel body is provided with a rear bracket, which is fixedly connected to the machine head and makes the front end surface of the silicon steel body close to the mounting surface, and the rear end of the rotating shaft of the grinding motor is positioned on the rear bracket.

5. The soymilk machine according to claim 4, characterized in that: The silicon steel body is provided with an axially penetrating connecting through hole, the motor mounting platform is provided with a connecting hole, and the rear bracket is provided with a fastener, which passes through the connecting through hole and cooperates with the connecting hole to fix the rear bracket, the silicon steel body and the metal lower cover; or, a fixing platform is provided in the metal lower cover, the front end of the rear bracket abuts against the silicon steel body, and the rear bracket is fixedly connected to the fixing platform to press and fix the silicon steel body; or, the front end of the rear bracket abuts against the silicon steel body, and the upper cover is provided with an upper support body, and the upper support body abuts against the rear bracket to press and fix the silicon steel body.

6. The soymilk machine according to claim 1, characterized in that: The inner side wall of the metal lower cover is provided with a limiting surface which contacts and fits with the outer side surface of the silicon steel body. The limiting surface is located above the mounting surface or is staggered with the mounting surface in the circumferential direction of the metal lower cover.

7. The soymilk machine according to claim 1, characterized in that: A heat dissipation gap communicated with the avoidance groove is provided between the front end surface of the silicon steel body and the metal lower cover.

8. The soymilk machine according to claim 1, characterized in that: The bottom end of the metal lower cover is provided with an axial hole, the rotating shaft of the crushing motor passes through the axial hole and extends out of the metal lower cover and is equipped with a crushing tool, and a shaft sealing assembly is provided at the axial hole to cooperate with the rotating shaft and position the rotating shaft.

9. The soymilk machine according to claim 8, characterized in that: The inner bottom surface of the metal lower cover is integrally cast with a positioning ring surrounding the shaft hole, and the shaft sealing assembly is installed in the positioning ring.

10. The soymilk machine according to claim 9, characterized in that: The outer peripheral side surface of the positioning ring is integrally cast with supporting ribs, and the supporting ribs are connected to the inner side surface of the metal lower cover and / or the motor mounting platform.

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