CN113768381A

CN113768381A - Food crushing device

Info

Publication number: CN113768381A
Application number: CN202111121069.6A
Authority: CN
Inventors: 钱宗华; 潘泽勇; 程建建; 李学珍; 黎文彬; 高源贵
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2021-12-10
Anticipated expiration: 2041-09-24
Also published as: CN113768381B

Abstract

The invention relates to a food crushing device comprising: the cup body is provided with an assembly cavity along the axial direction, and an axial through hole is formed in the assembly cavity; a drive shaft adapted to be inserted into the axial through hole; the rotating part is fixedly sleeved on the transmission shaft and is driven by the transmission shaft; and the bearing assembly comprises a first bearing, a bushing and a second bearing, the first bearing, the bushing and the second bearing are sequentially sleeved on the transmission shaft along the axial direction and are in interference fit with the groove wall of the assembly cavity, and two ends of the bushing are respectively abutted against the outer rings of the first bearing and the second bearing. The food crushing device provided by the invention can avoid the first bearing and/or the second bearing from slipping in the assembly cavity while the rotating coaxiality of the transmission shaft is not reduced, so that the noise of the food crushing device in the use process is reduced, and the service lives of the transmission shaft, the first bearing and the second bearing are prolonged.

Description

Food crushing device

Technical Field

The invention relates to the technical field of food processing devices, in particular to a food crushing device.

Background

The food crushing device such as a blender or a soymilk grinder generally comprises a rotating part, a cup body and a transmission shaft, and the rotating part can be driven by the transmission shaft to move in the cup body so as to achieve the purpose of use. Taking a blender as an example, a blender in the prior art generally comprises a cup body, a transmission shaft penetrating through a through hole on the cup body, and a blending knife driven by the transmission shaft. The stirring knife can rotate relative to the cup body under the drive of the transmission shaft, so that food is stirred and smashed by the stirring knife. In order to avoid collision and friction between the transmission shaft and the through hole of the cup body when the transmission shaft rotates in the cup body, the stirring machine generally comprises a first bearing and a second bearing which are sequentially sleeved on the transmission shaft along the axial direction, and an assembly cavity which can be in interference fit with the first bearing and the second bearing is further arranged on the hole wall of the through hole. This makes first bearing and second bearing can support the transmission shaft, and the improvement is avoided the transmission shaft to take place to incline in the through-hole and is reduced the friction that the transmission shaft received in rotatory process.

When the distance between the first bearing and the second bearing is set to be small, the difficulty of processing the assembly cavity is also small. However, if there is a slight difference in the coaxiality of the first bearing and the second bearing at this time, there is a possibility that the propeller shaft may be inclined. The transmission shaft collides with the hole wall of the through hole in the rotating process, noise is easily generated, and the service life of the transmission shaft can be shortened.

Therefore, the larger the distance between the first bearing and the second bearing is, the higher the rotation precision of the transmission shaft can be, and the inclination of the transmission shaft can be reduced. However, the longer the distance between the first bearing and the second bearing is, the longer the axial length of the assembly cavity is required to be, the longer the axial length of the assembly cavity is, the more difficult it is to ensure the consistency of the radial dimension of the assembly cavity, the assembly cavity and the surface of the first bearing and/or the second bearing are prone to generate gaps, so that the friction force between the assembly cavity and the outer ring of the bearing is insufficient, and the first bearing and/or the second bearing slips in the assembly cavity when the transmission shaft rotates, which in turn is prone to cause the abrasion of the bearing.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the bearing is easy to slip in the assembly cavity when the distance between the first bearing and the second bearing is larger, so that the food crushing device capable of preventing the first bearing and/or the second bearing from slipping in the assembly cavity without reducing the coaxiality of the rotation of the transmission shaft is provided.

In order to solve the above problems, the present invention provides a food crushing apparatus comprising: the cup body is provided with an assembly cavity along the axial direction, and an axial through hole is formed in the assembly cavity; a drive shaft adapted to be inserted into the axial through hole; the rotating part is fixedly sleeved on the transmission shaft and is driven by the transmission shaft; and the bearing assembly comprises a first bearing, a bushing and a second bearing, the first bearing, the bushing and the second bearing are sequentially sleeved on the transmission shaft along the axial direction and are in interference fit with the groove wall of the assembly cavity, and two ends of the bushing are respectively abutted against the outer rings of the first bearing and the second bearing.

Further, the assembly cavity comprises a first sub-cavity, a second sub-cavity and a third sub-cavity which are sequentially connected in the axial direction and sequentially increased in radial size, and a first bearing, a bushing and a second bearing are respectively arranged in the first sub-cavity, the second sub-cavity and the third sub-cavity.

Further, an annular plane is formed between the first sub-cavity and the second sub-cavity, and one end of the lining simultaneously abuts against the annular plane and the first bearing.

Further, the food crushing device also comprises an outer diameter check ring which is detachably connected with the cup body and shields the bottom of the assembly cavity, and the inner diameter of the outer diameter check ring is smaller than the outer diameter of the second bearing.

Furthermore, the inner wall of the lining is also provided with a groove part.

Further, the food crushing device further comprises a flat washer, an elastic washer and a retaining ring for the shaft, wherein the flat washer, the elastic washer and the retaining ring for the shaft are sequentially sleeved on the transmission shaft, and the flat washer is abutted against one side, far away from the bushing, of the bearing assembly.

Further, the food crushing device further comprises: the cover body is detachably connected with the cup body; the grinding assembly is arranged in the cup body and is spaced from the rotating piece, and comprises a filter screen, a static grinding disc and a movable grinding disc; the filter screen is detachably connected with the cover body; the static grinding disc is plugged at the bottom end of the filter screen and is fixedly connected with the filter screen, and a through hole allowing the transmission shaft to pass through is formed in the static grinding disc; and the movable grinding disc is arranged between the filter screen and the static grinding disc and is driven by the transmission shaft.

Further, the food crushing device further comprises: the axial matching hole is arranged on the movable grinding disc along the axial direction; at least one radial matching hole which is arranged on the movable grinding disc along the radial direction; the circumferential groove is arranged on the transmission shaft at a position matched with the radial matching hole; and the elastic jacking piece is arranged on the radial matching hole, and one end of the elastic jacking piece can penetrate into the circumferential groove and axially lock the transmission shaft.

Further, the cup includes a base and a side fixedly connected to a rim of the base, and a heating element embedded in the base, the heating element being axially spaced from the first bearing and the second bearing.

Further, the middle part of the base is provided with a protruding part, the assembly cavity is partially formed in the protruding part, the top end of the protruding part is higher than the edge of the base, and the second bearing is lower than the edge of the base.

Further, the food crushing device also comprises an annular sealing sleeve which is sleeved on the transmission shaft and is positioned in the gap which is suitable for shielding the transmission shaft and the cup body.

The invention has the following advantages:

according to the technical scheme, the bearing assembly of the food crushing device is additionally provided with the bushing, and two ends of the bushing are respectively abutted against the outer rings of the first bearing and the second bearing. When a gap exists between any one bearing and the cavity wall of the assembly cavity, so that the bearing and the assembly cavity tend to move relatively, static friction force can be generated between the bushing and the bearing, and the outer ring of the bearing and the outer wall of the assembly cavity are prevented from rotating relatively by the static friction force, so that the bearing is prevented from slipping. Therefore, the food crushing device can avoid the first bearing and/or the second bearing from slipping in the assembly cavity while not reducing the rotating coaxiality of the transmission shaft, so that the noise generated in the use process of the food crushing device is reduced, and the service lives of the transmission shaft, the first bearing and the second bearing are prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of a food crushing device according to an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an exploded view of another angle of the food-crushing device of the embodiment of the invention;

FIG. 4 is a bottom of a cup of the food crushing device of FIG. 3;

FIG. 5 is a cross-sectional view of a food-crushing device of an embodiment of the invention;

fig. 6 is an enlarged view of fig. 5 at B.

Description of reference numerals:

100. a food crushing device; 1. a cup body; 11. a base; 11a, assembling a cavity; 11b, an axial through hole; 111. a first sub-cavity; 112. a second subchamber; 113. a third subchamber; 114. a boss portion; 12. a side portion; 2. a drive shaft; 21. a circumferential groove; 3. a rotating member; 4. a bearing assembly; 41. a first bearing; 42. a bushing; 43. a second bearing; 44. a groove part; 5. an outer diameter retainer ring; 61. a flat washer; 62. an elastic washer; 63. a retainer ring for a shaft; 7. an annular seal cartridge; 8. a cover body; 91. a movable grinding disc; 92. filtering with a screen; 93. a static grinding disc; 931. an axial mating bore; 932. a radial mating hole; 933. an elastic top pressing piece.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 1 is an exploded view of a food crushing device according to an embodiment of the present invention. Fig. 2 is an enlarged view of a portion a in fig. 1. Fig. 3 is an exploded view of another angle of the food-crushing device of the embodiment of the invention. As shown in fig. 1, 2 and 3, the present invention relates to a food crushing device 100. Although the food crushing device 100 is a soymilk maker in the present embodiment, in other embodiments, the food crushing device 100 may be selected from a food processor, a juicer, an oil press, or the like. It comprises a cup body 1, a drive shaft 2, a rotor 3 and a bearing assembly 4. Wherein, the cup body 1 is provided with an assembly cavity 11a along the axial direction. An axial through hole 11b is formed in the fitting cavity 11 a. The transmission shaft 2 is adapted to be inserted into the axial through hole 11 b. The rotating part 3 is fixedly sleeved on the transmission shaft 2 and is driven by the transmission shaft 2. The bearing assembly 4 includes a first bearing 41, a bush 42, and a second bearing 43. The first bearing 41, the bushing 42 and the second bearing 43 are sequentially sleeved on the transmission shaft 2 along the axial direction. And is in interference fit with the groove wall of the fitting cavity 11 a. Both ends of the bush 42 abut against outer rings of the first bearing 41 and the second bearing 43, respectively. Wherein, the lower extreme of transmission shaft 2 links to each other with the rotation source, and the rotation source can be selected as the device that can output the rotation, for example motor, engine, hydraulic motor or one of them and the combination of speed reducer etc.. Preferably, the motor shaft transmits power to the transmission shaft 2 through a coupling. The transmission shaft 2 drives the rotating member 3 to rotate. In order for the transmission shaft 2 to be able to efficiently transmit the rotation to the rotating member 3, the transmission shaft 2 is preferably provided with an interference fit with the axial fitting hole 931 and a transmission portion at an upper end thereof. The radial cross section of the transmission part is preferably configured as a non-rotating body structure such as a cross or a rectangle, and the axial fitting hole 931 is configured to be capable of fittingly receiving the transmission part of the transmission shaft 2.

As can be seen from the above technical solutions, in the food crushing apparatus 100 of the present embodiment, the bush 42 is additionally provided in the bearing assembly 4, and both ends of the bush 42 are respectively abutted against the outer rings of the first bearing 41 and the second bearing 43. When a gap exists between any one bearing and the wall of the assembly cavity 11a, so that relative movement between the bearing and the assembly cavity 11a tends to exist, static friction force can be generated between the bush 42 and the bearing, and the outer ring of the bearing and the outer wall of the assembly cavity 11a are prevented from rotating relative to each other by virtue of the static friction force, so that the bearing is prevented from slipping. Therefore, the food crushing device 100 of the present embodiment can prevent the first bearing 41 and/or the second bearing 43 from slipping within the fitting cavity 11a while not reducing the coaxiality of the rotation of the transmission shaft 2, thereby reducing the noise occurring during the use of the food crushing device 100 and extending the service life of the transmission shaft 2, the first bearing 41, and the second bearing 43.

In addition, the bush 42 not only allows the distance between the first bearing 41 and the second bearing 43 to become larger, but also can withstand the shock generated during the rotation of the first bearing 41 and the second bearing 43, and further improves the stability of the transmission shaft 2 during the rotation. Since the bushing 42 is less costly than the bearings, it also allows for easy replacement after damage and extends the useful life of the bearings, reducing the cost of using the food crushing device 100. The bushing 42 is preferably made of a relatively soft, low cost material such as soft metal, rubber, nylon, and non-metallic polymers.

In the present embodiment, as shown in fig. 4, the assembly chamber 11a includes a first sub-chamber 111, a second sub-chamber 112, and a third sub-chamber 113 that are sequentially connected in the axial direction and sequentially increased in radial size. The first bearing 41, the bushing 42 and the second bearing 43 are disposed in the first sub-chamber 111, the second sub-chamber 112 and the third sub-chamber 113, respectively. The first sub-chamber 111, the second sub-chamber 112 and the third sub-chamber 113 divide the assembly chamber 11a with a long length into a plurality of shorter chambers, further reducing the risk of the assembly chamber 11a having a long length and causing a large clearance to occur between the assembly chamber 11a and the first bearing 41 and the second bearing 43. In addition, since the radial dimensions of the first sub-chamber 111, the second sub-chamber 112 and the third sub-chamber 113 are set to increase in sequence, an annular plane is formed between every two adjacent sub-chambers. The first bearing 41, the bush 42 and the second bearing 43 can be abutted against one annular flat surface in a one-to-one correspondence, thereby facilitating accurate mounting of the first bearing 41, the bush 42 and the second bearing 43 to the corresponding positions, respectively.

In order to maximize the static friction of the bushing 42 against the first and second bearings 41, 43, an annular plane is preferably formed between the first and second subchambers 111, 112. One end of the bush 42 abuts against both the annular flat surface and the first bearing 41 (see fig. 2). This causes the bushing 42 and the annular flat support to have pressure, and when there is a gap between any one of the bearings and the assembly cavity 11a, which causes a tendency of relative movement between the bearing and the assembly cavity 11a, a static friction force is generated between the annular flat support and the bushing 42, thereby preventing the bushing 42 from rotating with the outer ring of the bearing, and ensuring that the bushing 42 can keep relatively stationary with the assembly cavity 11a and continuously preventing the first bearing 41 and the second bearing 43 from moving relative to the assembly cavity 11 a.

In this embodiment, the food crushing device 100 further comprises an outer diameter retainer ring 5 detachably connected to the cup body 1 and shielding the bottom of the fitting cavity 11 a. The inner diameter of the outer diameter collar 5 is smaller than the outer diameter of the second bearing 43. The bearing assembly 4 can be confined in the fitting cavity 11 a. The connection between the collar 5 and the container may alternatively be a snap connection or a screw connection or the like, but is preferably a strong and secure screw connection (see fig. 3).

To facilitate replacement of the liner 42, the liner 42 is also provided with a groove 44 in the inner wall thereof. An operator can insert the bush 42 into the groove portion 44 and take out the bush from the fitting cavity 11a by a tool such as a hook or an expander. The slot 44 may be provided as a groove, but is preferably a through slot provided through the sidewall of the bushing 42.

In this embodiment, the food crushing device 100 preferably further comprises a flat washer 61, an elastic washer 62 and a shaft retainer 63 which are sequentially sleeved on the transmission shaft 2. The flat washer 61 abuts against the side of the bearing assembly 4 remote from the bush 42. The shaft retainer 63 can rotate following the drive shaft 2. The elastic washer 62 can be pressed against the flat washer 61 by the shaft retainer 63 and applies a pressing force to the inner ring of the bearing assembly 4 by means of the flat washer 61 to drive the inner ring of the bearing to rotate together when the drive shaft 2 rotates, reducing the risk of the inner ring of the bearing moving relative to the drive shaft 2 and causing wear to the drive shaft 2. Therefore, the bush 42 can prevent the outer races of the first bearing 41 and the second bearing 43 from moving relative to the fitting cavity 11a, and the combination of the flat washer 61, the elastic washer 62, and the shaft retaining ring 63 can prevent the inner races of the first bearing 41 and the second bearing 43 from moving relative to the drive shaft 2. Therefore, the use of the bushing 42 in cooperation with the flat washer 61, the elastic washer 62 and the shaft retainer 63 enables the first bearing 41 and the second bearing 43 to stably right the drive shaft 2, and there is a risk of the drive shaft 2 tilting or bearing slipping during the operation of the food crushing apparatus 100.

In this embodiment, the food crushing device 100 preferably further includes a lid body 8 and a grinding assembly disposed in the cup body 1 and spaced apart from the rotating member 3. Wherein, the grinding assembly comprises a filter screen 92, a static grinding disc 93 and a movable grinding disc 91. Wherein, the cover body 8 is detachably connected with the cup body 1. The filter screen 92 is detachably connected to the cover 8. The static grinding disc 93 is blocked at the bottom end of the filter screen 92 and is fixedly connected with the filter screen 92. The static grinding disc 93 is provided with a through hole for allowing the transmission shaft 2 to pass through. The movable grinding disc 91 is arranged between the filter screen 92 and the static grinding disc 93 and is driven by the transmission shaft 2. The filter screen 92 is provided with meshes, the static grinding disc 93 is arranged below the filter screen 92, and the static grinding disc 93 can be fixed due to the fixed arrangement of the filter screen 92. The movable grinding disc 91 and the rotating part 3 can rotate relative to the static grinding disc 93 under the driving of the transmission shaft 2, and grind food between the movable grinding disc 91 and the static grinding disc 93. The ground food can be introduced into the cup body 1 through the sieve 92. Into the cup body 1. The stirring member can further stir the ground food, thereby preventing the food from being unevenly distributed. Meanwhile, the stirring piece can also promote the ground food to rotate in the cup body 1, so that the ground food enters the space between the movable grinding disc 91 and the static grinding disc 93 through the filter screen 92 again, the grinding assembly can grind the food for many times, and the fine degree of the food is favorably improved.

When it is desired to whip food, the operator can easily separate the grinding assembly from the cover 8 and cause the drive shaft 2 to drive the stirring element to rotate at the whipping speed due to the detachable connection between the sieve 92 and the cover 8. The food grinding device has the capability of stirring the food materials by the blades and the capability of grinding the food materials, integrates the advantages of two working principles, and is beneficial to improving the user experience. The detachable connection between the filter screen 92 and the cover 8 can optionally be a detachable connection implemented by a snap-in assembly, a threaded connection assembly or a riveted assembly, but a snap-in assembly is preferred to facilitate quick detachment. The rotating member 3 may be selected as an impeller or a stirring blade, but is preferably a stirring blade capable of crushing food.

As another embodiment, in this embodiment, the rotating member 3 may be disposed below the stationary grinding disc 93, and the transmission shaft 2 does not pass through the stationary grinding disc 93 and then is connected to the rotating member 3, but directly acts on the rotating member 3, and during operation, the rotating member 3 is disposed below the stationary grinding disc 93.

In the present embodiment, as shown in fig. 5 and 6, the food crushing device 100 preferably further includes an axial fitting hole 931, a radial fitting hole 932, a circumferential groove 21, and a resilient top-pressing member 933. Preferably, axial fitting hole 931 is provided on movable grinding disc 91 in the axial direction. The radial fitting hole 932 is at least one, and is radially provided on the movable grinding disk 91. A circumferential groove 21 is provided on the drive shaft 2 at a position to fit the radial fitting hole 932. An elastic biasing member 933 is provided on the radial fitting hole 932, and one end thereof can be inserted into the circumferential groove 21 and axially lock the transmission shaft 2. When the transmission shaft 2 is inserted into the axial fitting hole 931, the elastic pressing member 933 can be firstly compressed by the outer surface of the transmission shaft 2 and then extended by its elastic restoring force after being aligned with the circumferential groove 21 of the transmission shaft 2, thereby axially locking the rotation member 3 to ensure the stability of the rotation member 3 during the rotation. When the rotating part 3 needs to be detached from the transmission shaft 2, the transmission shaft 2 can move in a direction away from the rotating part 3 under the action of external force, and the elastic jacking part 933 can be compressed by the outer surface of the transmission shaft 2, so that the rotating part 3 is allowed to be separated from the transmission shaft 2, and the rotating part 3 is convenient to clean. When the elastic pressing member 933 is provided in plurality, radial pressures applied to the transmission shaft 2 by the plurality of elastic pressing members 933 can be offset to each other, so that the transmission shaft 2 is prevented from being biased by the elastic pressing member 933. The axial locking means that the elastic pressing member 933 can prevent the rotation member 3 from moving in the up-and-down direction. The elastic pressing member 933 may be an elastic component such as an elastic ball plug, an elastic plunger or an elastic sheet. In this embodiment, however, the elastic pressing member 933 preferably includes an elastic rubber plug and a locking head. The elastomeric plug is loaded into the radial mating holes 932. The locking head fits into the radial mating hole 932 and can be partially ejected by the elastomeric plug. The elastic rubber plug is preferably, but not limited to, made of materials such as rubber or silica gel, which have elasticity and resilience and appropriate mechanical strength.

In this embodiment, cup 1 includes a base 11 and a side 12 fixedly connected to the rim of base 11, and a heating element embedded in base 11. The heating element is axially spaced from the first bearing 41 and the second bearing 43. This can reduce the risk of the first and second bearings 41 and 43 being damaged by thermal expansion and contraction, thereby improving the service life of the first and second bearings 41 and 43. The heating element is preferably, but not limited to, a heating tube, an electromagnetic heater, a heating wire, and the like.

In the present embodiment, the middle of the base 11 is provided with a convex portion 114. The fitting cavity 11a is partially formed in the boss 114. The top end of the convex portion 114 is higher than the edge of the base 11, and the second bearing 43 is lower than the edge of the base 11. This brings the edge of the base 11 to a central position of the boss 114. The first bearing 41 and the second bearing 43 are arranged on the upper part of the edge of the base 11 and on the lower part of the edge of the base 11, so that the vibration of the transmission shaft 2 and the bearings in the rotating process can be balanced and counteracted better.

In this embodiment, the food crushing device 100 further comprises an annular sealing sleeve 7 which is sleeved on the transmission shaft 2 and is located in a position suitable for shielding a gap between the transmission shaft 2 and the cup body 1, and the annular sealing sleeve 7 can prevent the crushed food in the cup body 1 from flowing out through a gap between the transmission shaft 2 and the cup body 1, so that liquid leakage of the food crushing device 100 is avoided. The annular sealing sleeve 7 is preferably, but not exclusively, made of a material rich in elasticity and resilience and having suitable mechanical strength, such as rubber or silicone.

In summary, the food crushing device 100 of the present embodiment can prevent the first bearing 41 and/or the second bearing 43 from slipping in the assembly cavity 11a without reducing the coaxiality of the rotation of the transmission shaft 2, thereby reducing the occurrence of noise during the use of the food crushing device 100 and prolonging the service life of the transmission shaft 2, the first bearing 41 and the second bearing 43.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A food crushing device, comprising:

the cup comprises a cup body (1), wherein an assembly cavity (11a) is axially arranged on the cup body (1), and an axial through hole (11b) is formed in the assembly cavity (11 a);

a transmission shaft (2) adapted to be inserted into the axial through hole (11 b);

the rotating part (3) is fixedly sleeved on the transmission shaft (2) and is driven by the transmission shaft (2);

bearing assembly (4), it includes first bearing (41), bush (42) and second bearing (43), first bearing (41), bush (42) and second bearing (43) overlap in proper order along the axial on transmission shaft (2), and with the cell wall interference fit of assembly cavity (11a), the both ends of bush (42) respectively with the outer lane counterbalance of first bearing (41) and second bearing (43).

2. The food crushing device according to claim 1, wherein the assembly chamber (11a) comprises a first sub-chamber (111), a second sub-chamber (112) and a third sub-chamber (113) which are connected in sequence along an axial direction and which have sequentially increased radial dimensions, the first bearing (41), the bushing (42) and the second bearing (43) being arranged in the first sub-chamber (111), the second sub-chamber (112) and the third sub-chamber (113), respectively.

3. A food-breaking device according to claim 2, characterized in that an annular plane is formed between said first (111) and second (112) subcavities, one end of said bushing (42) being simultaneously in abutment with said annular plane and with said first bearing (41).

4. A food crushing device according to claim 2, characterized by further comprising an outer diameter collar (5) detachably connected to the cup body (1) and shielding the bottom of the fitting cavity (11a), the inner diameter of the outer diameter collar (5) being smaller than the outer diameter of the second bearing (43).

5. A food crushing device according to any one of claims 1 to 4, characterized in that the inner wall of the bushing (42) is further provided with a groove (44).

6. A food breaking device according to any one of claims 1 to 4, further comprising a flat washer (61), a resilient washer (62) and a shaft retainer (63) which are fitted over the drive shaft (2) in this order, the flat washer (61) abutting against the side of the bearing assembly (4) remote from the bushing (42).

7. The food crushing device of any one of claims 1 to 4, further comprising:

a cover body (8) which is detachably connected with the cup body (1);

a grinding assembly, arranged in the cup body (1) and spaced apart from the rotating member (3), comprising a sieve (92), a stationary grinding disc (93) and a movable grinding disc (91);

a strainer (92) detachably connected to the lid (8);

the static grinding disc (93) is plugged at the bottom end of the filter screen (92) and is fixedly connected with the filter screen (92), and a through hole allowing the transmission shaft (2) to pass through is formed in the static grinding disc (93);

and the movable grinding disc (91) is arranged between the filter screen (92) and the static grinding disc (93) and is driven by the transmission shaft (2).

8. The food crushing device of claim 7, further comprising:

an axial fitting hole (931) provided in the axial direction on the movable grinding disc (91);

at least one radial fitting hole (932) provided on the movable grinding disc (91) in a radial direction;

a circumferential groove (21) provided on the drive shaft (2) at a position where the radial fitting hole (932) is fitted;

and the elastic pressing piece (933) is arranged on the radial matching hole (932), and one end of the elastic pressing piece can penetrate into the circumferential groove (21) and axially lock the transmission shaft (2).

9. A food crushing device as claimed in any one of claims 1 to 4, characterized in that the cup body (1) comprises a base (11) and a side (12) fixedly connected to the rim of the base (11), and a heating element embedded in the base (11), the heating element being axially spaced from the first bearing (41) and the second bearing (43).

10. A food crushing apparatus according to claim 9, wherein the base (11) is provided with a raised portion (114) at a central portion thereof, the fitting cavity (11a) is partially formed in the raised portion (114), a top end of the raised portion (114) is higher than a rim of the base (11), and the second bearing (43) is lower than the rim of the base (11).

11. A food breaking device according to any one of claims 1 to 4, further comprising an annular sealing sleeve (7) fitted over the transmission shaft (2) and located in a position suitable to shield the gap between the transmission shaft (2) and the cup (1).