CN216020632U - Food preparation machine that waterproof performance is good - Google Patents

Abstract

The utility model discloses a food processing machine with good waterproof performance, which belongs to the field of domestic electric appliances and solves the problem that the sealing reliability is reduced and even fails due to the abrasion of a shaft sealing element after long-term use. The utility model is mainly used for ensuring the sealing reliability between the output shaft of the crushing motor and the output shaft hole in the long-term use process.

Description

Food preparation machine that waterproof performance is good

Technical Field

The utility model relates to a domestic electric appliance, in particular to a food processor with good waterproof performance.

Background

The existing food processor generally drives the crushing device to work through the crushing motor, the output shaft of the crushing motor can extend into the working cavity, a shaft sealing element is generally arranged on the output shaft of the crushing motor in order to ensure that the working space of the crushing motor is isolated from the water vapor of the working cavity, the shaft sealing element is fixed in a shaft outlet, and the dynamic sealing is realized by the matching of a sealing lip and the output shaft of the crushing motor. Because the rotation speed of the existing grinding motor is relatively fast, after the sealing mode is used for a certain time, the sealing lip of the shaft sealing element is easy to wear, so that the sealing reliability of the shaft sealing element is obviously reduced, and even the sealing failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a food processor with good waterproof performance, which ensures the sealing reliability between an output shaft and an output shaft hole of a crushing motor in the long-term use process.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a food preparation machine that waterproof performance is good, including the working chamber, crushing motor and pedestal, be equipped with out the shaft hole on the pedestal, crushing motor driven output shaft passes out the shaft hole and stretches into the working chamber, be equipped with the sealed axle seal subassembly of going out the shaft hole on the output shaft, the axle seal subassembly is including moving sealing member and static sealing member, the output shaft passes in proper order and moves the sealing member, static sealing member and play shaft hole, move the sealing member and go out the shaft hole sealed fit and can with the output shaft synchronous revolution, the front end of moving the sealing member is equipped with the dynamic seal face, static sealing member is fixed and encircles out the shaft hole and pedestal sealing connection relative to the pedestal, the rear end of static sealing member is equipped with the static seal face, static seal face and the sealed face looks butt of dynamic seal realize moving the sealed under the relative static sealing member rotation state of dynamic seal.

Furthermore, the static sealing element is in sealing connection with the base body through a sealing gasket.

Furthermore, the sealing gasket comprises an end face sealing part positioned between the front end face of the static sealing element and the seat body.

Furthermore, the base body tightly presses the end face sealing part, and the static sealing surface and the dynamic sealing surface are kept in butt joint under the elastic action of the end face sealing part.

Further, the sealing gasket comprises a circumferential sealing part positioned between the peripheral side surface of the static sealing element and the base body.

Furthermore, the dynamic sealing element comprises an axial sealing ring and an end face sealing ring, the axial sealing ring is in sealing fit with the output shaft and fixed, the end face sealing ring is fixed at the front end of the axial sealing ring and has a gap with the output shaft, and the dynamic sealing surface is located at the front end of the end face sealing ring.

Furthermore, the rear end face of the end face sealing ring is abutted against the front end face of the axial sealing ring, the movable sealing element further comprises a supporting sleeve wrapping the peripheries of the axial sealing ring and the end face sealing ring, and the supporting sleeve axially positions the axial sealing ring and the end face sealing ring into a whole; or the front end face of the axial sealing ring is provided with an embedded groove, the end face sealing ring is embedded in the embedded groove, and the front end of the end face sealing ring extends out of the embedded groove; or the axial sealing ring is a wear-resistant material ring, and the end face sealing ring is a self-lubricating material ring.

Furthermore, an end face bearing is arranged on the output shaft and is located behind the movable sealing element, a fixed ring of the end face bearing is located behind the movable ring, the fixed ring of the end face bearing is fixed relative to the base body and is in clearance fit with the output shaft, the movable ring of the end face bearing and the output shaft rotate synchronously, and the movable sealing element generates axial acting force on the movable ring of the end face bearing to achieve axial positioning of the movable ring of the end face bearing.

Furthermore, the movable sealing element and the movable ring of the end face bearing are provided with elastic elements, and the movable sealing element generates axial acting force on the movable ring of the end face bearing through the elastic elements.

Furthermore, the food processor comprises a machine head and a cup body, the machine head is buckled on the cup body, the working cavity is positioned in the cup body, the grinding motor is installed in the machine head, the machine head comprises a machine head lower cover and an end cover serving as a base body, an output shaft hole is formed in the bottom end surface of the end cover, a through hole is formed in the bottom end of the machine head lower cover, the end cover is connected with the machine head lower cover in a sealing mode and covers the through hole, a dynamic sealing element and a static sealing element are positioned in the end cover, and the static sealing element is connected with the inner wall of the end cover in a sealing mode;

or the food processor comprises a machine head and a cup body, the machine head is buckled on the cup body, the working cavity is positioned in the cup body, the grinding motor is installed in the machine head, the machine head comprises a machine head lower cover serving as a seat body, an output shaft hole is formed in the bottom end face of the machine head lower cover, the grinding motor is fixed and then presses the movable sealing piece and the static sealing piece on the inner bottom face of the machine head lower cover, and the static sealing piece is connected with the inner bottom face of the machine head lower cover in a sealing mode.

Or the food processor comprises a base and a crushing cup fixed on the base, the crushing motor is fixedly arranged in the base, the working cavity is positioned in the crushing cup, the base body is the crushing cup, the shaft outlet is arranged at the bottom of the crushing cup, the dynamic sealing element and the static sealing element are arranged on the outer side of the bottom of the crushing cup, and the static sealing element is connected with the outer wall of the crushing cup in a sealing manner;

or the food processor comprises a base and a crushing cup detachably connected to the base, the crushing motor is fixedly installed in the base, the working cavity is located in the crushing cup, the base is the crushing cup, the output shaft hole is formed in the bottom of the crushing cup, the output shaft is a cutter shaft arranged at the bottom of the crushing cup, the cutter shaft is in transmission connection with a motor shaft of the crushing motor, the dynamic sealing element and the static sealing element are installed on the outer side of the bottom of the crushing cup, and the static sealing element is in sealing connection with the outer wall of the crushing cup.

After the technical scheme is adopted, the utility model has the following advantages: the dynamic sealing matching relation of the end face structure between the dynamic sealing element and the static sealing element is adopted, and the static sealing surface and the dynamic sealing surface are both plane sealing structures, so that the reliable sealing and waterproof functions are easier to realize in relative rotation motion; after the static sealing surface and the dynamic sealing surface are abraded, a plane sealing structure is still arranged between the static sealing surface and the dynamic sealing surface, so that a good sealing and waterproof effect is still kept in the long-term use process.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a prior art food processor;

FIG. 2 is a schematic view of the interior of a lower cover of a handpiece in accordance with one embodiment of the present invention;

FIG. 3 is an enlarged view taken at I in FIG. 2;

FIG. 4 is a cross-sectional view (in isolation) of a dynamic seal according to one embodiment of the present invention;

FIG. 5 is a cross-sectional view (assembled) of a dynamic seal according to one embodiment of the present invention;

FIG. 6 is a schematic view of another dynamic seal according to an embodiment of the present invention;

fig. 7 is a schematic view of another prior art food processor.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein.

It should be understood that, in various embodiments of the present invention, for example, the serial numbers of the processes are referred to, and do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprises A, B and C" and "comprises A, B, C" means that all three of A, B, C comprise, "comprises A, B or C" means that one of A, B, C comprises, "comprises A, B and/or C" means that any 1 or any 2 or 3 of A, B, C comprises.

The utility model aims to realize the purpose of the utility model and provides a food processing machine with good waterproof performance, which comprises a working chamber, a grinding motor and a base body, wherein the base body is provided with a shaft outlet hole, an output shaft driven by the grinding motor penetrates through the shaft outlet hole and extends into the working chamber, the output shaft is provided with a shaft sealing assembly for sealing the shaft outlet hole, the shaft sealing assembly comprises a movable sealing element and a static sealing element, the output shaft sequentially penetrates through the movable sealing element, the static sealing element and the shaft outlet hole, the movable sealing element is in sealing fit with the output shaft and can rotate synchronously with the output shaft, the front end of the movable sealing element is provided with a movable sealing surface, the static sealing element is fixed relative to the base body and is in sealing connection with the base body around the shaft outlet hole, the rear end of the static sealing element is provided with a static sealing surface, and the static sealing surface is abutted against the movable sealing surface to realize the sealing element in sealing state relative to the static sealing element. The utility model cancels the dynamic seal matching relation of the hole-shaft structure between the output shaft and the shaft sealing element in the prior art, but adopts the dynamic seal matching relation of the end surface structure between the dynamic sealing element and the static sealing element, compared with the cylindrical surface sealing structure in the hole-shaft structure, the reliable sealing and water-proof functions are easier to realize in the relative rotation motion because the static sealing surface and the dynamic sealing surface are both plane sealing structures; after the static sealing surface and the dynamic sealing surface are abraded, a plane sealing structure is still arranged between the static sealing surface and the dynamic sealing surface, so that a good sealing and waterproof effect is still kept in the long-term use process.

However, the structure of the food processor may vary depending on the type of the food processor, and the technical solution of the present invention will be described in detail with reference to specific embodiments. The following specific embodiments may be combined with or replace components according to actual situations, and details of the same or similar concepts or processes may not be repeated in some embodiments.

The first embodiment is as follows:

a food processor comprises a machine head 1 and a cup body 2, wherein the machine head 1 is buckled on the cup body 2, a working cavity 200 is arranged in the cup body 2, a grinding motor 3 is arranged in the machine head 1, and an output shaft driven by the grinding motor 3 is a motor shaft 31 of the grinding motor 3, such as the machine type shown in figure 1. In this embodiment, to install the shaft sealing assembly, the handpiece 1 includes a handpiece lower cover 11 and an end cover 12 as a base, as shown in fig. 2 and 3, the shaft outlet hole 100 is disposed on a bottom end surface of the end cover 12, a through hole 110 is disposed at a bottom end of the handpiece lower cover 11, the end cover 12 is hermetically connected with the handpiece lower cover 11 and covers the through hole 110, the dynamic sealing element 41 and the static sealing element 42 are disposed in the end cover 12, and the static sealing element 42 is hermetically connected with an inner wall of the end cover 12. The end cap 12 has the advantage that the shaft seal assembly can be mounted after the components inside the machine head 1 are mounted, so that the coaxiality between the dynamic seal 41 and the motor shaft 31 is easily ensured.

The sealing between the static seal 42 and the inner wall of the end cover 12 may be performed in various ways, for example, by surface-to-surface contact with high precision machining, or, as in the present embodiment, by providing a gasket 43 between the static seal 42 and the end cover 12. Because this embodiment does not directly seal the shaft outlet hole 100, therefore steam will enter the end cover 12 through the shaft outlet hole 100, so in order to minimize the path that steam can go deep into the end cover 12, the sealing gasket 43 may be designed to include the end face sealing portion 431 located between the front end face of the static sealing member 42 and the end cover 12, and through the sealing effect of the end face sealing portion 431, steam is blocked in the inner hole range of the sealing gasket 43.

Because the sealing gasket 43 has a certain elastic capacity, the end face sealing part 431 can be pressed tightly through the end cover 12, the static sealing surface 420 and the dynamic sealing surface 410 are kept in contact under the elastic force of the end face sealing part 431, and therefore, as long as the abrasion degree of the static sealing surface 420 and the dynamic sealing surface 410 is within a certain range, a good sealing and waterproof effect is still kept by the elastic force of the end face sealing part 431.

In the present embodiment, in order to further improve the sealing and waterproof effect, the sealing gasket 43 further includes a circumferential sealing portion 432 between the outer circumferential side surface of the static sealing member 42 and the end cover 12. The circumferential sealing surface formed by the circumferential sealing part 432 and the end surface sealing surface formed by the end surface sealing part 431 form a double sealing effect, and the sealing and waterproof effects are naturally better. Of course, in another embodiment, the circumferential seal 432 may be implemented separately.

Because the dynamic seal 41 needs to be fixedly connected with the output shaft to rotate synchronously and also needs to be in contact with the static seal 42 to rub, in order to better achieve the connection function and the sealing function, the dynamic seal 41 in this embodiment includes an axial seal ring 411 and an end face seal ring 412, referring to fig. 4 and 5, the axial seal ring 411 is fixed in a sealing fit with the output shaft, the end face seal ring 412 is fixed at the front end of the axial seal ring 411 and has a gap with the output shaft, and the dynamic seal face 410 is located at the front end of the end face seal ring 412. The axial sealing ring 411 is used for connecting an output shaft, so that a material with higher connection reliability can be selected, for example, a wear-resistant material ring is adopted, the axial sealing ring can be made of wear-resistant materials such as polytetrafluoroethylene, a gap is reserved between the end face sealing ring 412 and the output shaft, the axial sealing ring is naturally not in contact with the output shaft, the sealing function can be realized only by being in contact friction with the static sealing element 42, and therefore, a material with a self-lubricating effect can be selected, for example, a self-lubricating material ring is adopted, and self-lubricating materials such as graphite can be selected for making. To achieve a better dynamic sealing relationship, the static seal 42 may be made of a material having a surface that is susceptible to a higher surface finish, such as ceramic.

In order to fix the axial sealing ring 411 and the end face sealing ring 412 together and to facilitate replacement when the end face sealing ring 412 is worn to a degree that the end face sealing ring cannot be used continuously, the rear end face of the end face sealing ring 412 can be designed to abut against the front end face of the axial sealing ring 411, the dynamic sealing element 41 further comprises a supporting sleeve 413 wrapping the peripheries of the axial sealing ring 411 and the end face sealing ring 412, and the supporting sleeve 413 axially positions the axial sealing ring 411 and the end face sealing ring 412 into a whole. For example, the positioning step 4111 is provided on the outer periphery of the axial seal ring 411, the support sleeve 413 abuts against the positioning step 4111, the folded edge 4131 is provided at the front end of the support sleeve 413, and the folded edge 4131 abuts against the end face seal ring 412 after being folded, thereby axially positioning the axial seal ring 411 and the end face seal ring 412 as a whole. In addition to this, the axial sealing ring 411 and the end sealing ring 412 can be fixed together by glue or other common methods. In addition, as shown in fig. 6, a structure may be adopted in which a caulking groove 4112 is provided on a front end surface of the axial seal ring 411, the end surface seal ring 412 is fitted in the caulking groove 4112, and the front end extends out of the caulking groove 4112.

In order to axially position the dynamic seal 41 and rotate along with the output shaft, the output shaft may be provided with an end face bearing 32, the end face bearing 32 is located behind the dynamic seal 41, a fixed ring 321 of the end face bearing 32 is located behind the movable ring 322, the fixed ring 321 of the end face bearing 32 is fixed relative to the end cover 12, for example, the end face bearing may be fixedly connected to the head lower cover 11, the fixed ring 321 of the end face bearing 32 is also in clearance fit with the output shaft to avoid friction, the movable ring 322 of the end face bearing 32 and the output shaft rotate synchronously, the dynamic seal 41 generates an axial acting force on the movable ring 322 of the end face bearing 32 to achieve axial positioning of the movable ring 322 of the end face bearing 32, and conversely, the axial positioning of the dynamic seal 41 is naturally achieved. If the end face bearing 32 is in direct contact with the movable sealing element 41, the assembly relationship is easy to be unstable due to manufacturing and assembly tolerances, so that the elastic element 33 can be arranged between the movable sealing element 41 and the movable ring 322 of the end face bearing 32, the movable sealing element 41 can generate axial acting force on the movable ring 322 of the end face bearing 32 through the elastic element 33, adverse effects caused by manufacturing and assembly tolerances can be eliminated, and stable and reliable axial positioning is ensured.

Example two:

in a similar machine type to the embodiment, the head lower cover 11 may also be selected as the base, it can be understood that the end cover 12 and the head lower cover 11 in the first embodiment are integrally formed, the shaft outlet hole 100 is formed in the bottom end surface of the head lower cover 11, the movable sealing element 41 and the static sealing element 42 are pressed against the inner bottom surface of the head lower cover 11 after the grinding motor 3 is fixed, and the static sealing element 42 is connected with the inner bottom surface of the head lower cover 11 in a sealing manner. The difference from the first embodiment is that the assembly sequence is changed, and the shaft seal assembly is installed in the machine head 1, and then the crushing motor 3 is installed in the machine head 1.

Other contents not described in this embodiment may refer to embodiment one.

Example three:

in addition to the first and second embodiments, another existing food processor model can refer to fig. 7, which includes a base 5 and a grinding cup 6 detachably connected to the base 5, wherein a user can freely remove or mount the grinding cup 6 from or on the base 5 during use, the grinding motor 3 is fixedly mounted in the base 5, the working chamber 200 is located in the grinding cup 6, the base is the grinding cup 6, the shaft outlet 100 is located at the bottom of the grinding cup 6, the output shaft is a knife shaft 61 located at the bottom of the grinding cup 6, the knife shaft 61 is in transmission connection with a motor shaft 31 of the grinding motor 3, in this model, the movable sealing member 41 and the static sealing member 42 can be mounted at the outer side of the bottom of the grinding cup 6, and the static sealing member 42 is in sealing connection with the outer wall of the grinding cup 6.

Other contents not described in the present embodiment may refer to the above-described embodiments.

Example four:

in a similar model with the third embodiment, the pulverizing cup 6 can be designed into a structure which is not detachable by a user, the pulverizing motor 3 is fixedly arranged in the base 5, the output shaft can be a motor shaft of the pulverizing motor 3, and other structures are as the third embodiment.

Other contents not described in the present embodiment may refer to the above-described embodiments.

Besides the two models shown in the attached drawings, the utility model can also be applied to other models which need to solve the problem of sealing and water proofing between the output shaft and the output shaft hole, and the description is omitted here. In addition to the preferred embodiments described above, the present invention has other embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention as claimed.

Claims (10)

1. A food processor with good waterproof performance comprises a working chamber, a grinding motor and a base body, wherein a shaft outlet hole is formed in the base body, an output shaft driven by the grinding motor penetrates through the shaft outlet hole and extends into the working chamber, a shaft sealing assembly for sealing the shaft outlet hole is arranged on the output shaft, the shaft sealing assembly is characterized in that the shaft sealing assembly comprises a movable sealing element and a static sealing element, the output shaft sequentially penetrates through the movable sealing element, the static sealing element and the shaft outlet hole, the movable sealing element is in sealing fit with the output shaft and can rotate synchronously with the output shaft, a movable sealing surface is arranged at the front end of the movable sealing element, the static sealing element is fixed relative to the base body and is in sealing connection with the base body around the shaft outlet hole, a static sealing surface is arranged at the rear end of the static sealing element, and the static sealing surface is abutted to the movable sealing element to realize the sealing element to be sealed in a rotating state relative to the static sealing element.

2. The food processor as claimed in claim 1, wherein the static sealing member is connected to the housing in a sealing manner by a sealing gasket.

3. The food processor of claim 2, wherein the gasket includes an end seal between the front end of the static seal and the housing.

4. The food processor as claimed in claim 3, wherein the housing is pressed against the end face seal portion, and the static seal surface and the dynamic seal surface are held in abutment by the elastic force of the end face seal portion.

5. A food processor as claimed in claim 2 or 3, wherein the gasket comprises a circumferential seal between the peripheral side of the static seal and the housing.

6. The food processor with good waterproof performance as claimed in claim 1, wherein the dynamic sealing element comprises an axial sealing ring and an end face sealing ring, the axial sealing ring is fixed with the output shaft in a sealing fit mode, the end face sealing ring is fixed at the front end of the axial sealing ring and has a gap with the output shaft, and the dynamic sealing surface is located at the front end of the end face sealing ring.

7. The food processor with good waterproof performance as claimed in claim 6, wherein the rear end face of the end face sealing ring abuts against the front end face of the axial sealing ring, the dynamic sealing element further comprises a supporting sleeve wrapping the peripheries of the axial sealing ring and the end face sealing ring, and the supporting sleeve axially positions the axial sealing ring and the end face sealing ring into a whole; or the front end face of the axial sealing ring is provided with an embedded groove, the end face sealing ring is embedded in the embedded groove, and the front end of the end face sealing ring extends out of the embedded groove; or the axial sealing ring is a wear-resistant material ring, and the end face sealing ring is a self-lubricating material ring.

8. The food processor as claimed in claim 1, wherein the output shaft is provided with an end face bearing, the end face bearing is located behind the dynamic sealing element, a fixed ring of the end face bearing is located behind the movable ring, the fixed ring of the end face bearing is fixed relative to the base and is in clearance fit with the output shaft, the movable ring of the end face bearing and the output shaft rotate synchronously, and the dynamic sealing element generates axial acting force on the movable ring of the end face bearing to realize axial positioning of the movable ring of the end face bearing.

9. The food processor as claimed in claim 8, wherein the movable sealing member and the movable ring of the end bearing are provided with an elastic member, and the movable sealing member generates an axial force to the movable ring of the end bearing through the elastic member.

10. The food processor with good waterproof performance according to claim 1, characterized in that the food processor comprises a machine head and a cup body, the machine head is buckled on the cup body, the working chamber is positioned in the cup body, the grinding motor is arranged in the machine head, the machine head comprises a machine head lower cover and an end cover as a seat body, an output shaft hole is arranged on the bottom end surface of the end cover, a through hole is arranged at the bottom end of the machine head lower cover, the end cover is connected with the machine head lower cover in a sealing mode and covers the through hole, a movable sealing element and a static sealing element are positioned in the end cover, and the static sealing element is connected with the inner wall of the end cover in a sealing mode;

or the food processor comprises a machine head and a cup body, the machine head is buckled on the cup body, the working cavity is positioned in the cup body, the grinding motor is installed in the machine head, the machine head comprises a machine head lower cover serving as a seat body, an output shaft hole is formed in the bottom end surface of the machine head lower cover, the grinding motor is fixed to tightly press the movable sealing element and the static sealing element on the inner bottom surface of the machine head lower cover, and the static sealing element is connected with the inner bottom surface of the machine head lower cover in a sealing mode;

or the food processor comprises a base and a crushing cup fixed on the base, the crushing motor is fixedly arranged in the base, the working cavity is positioned in the crushing cup, the base body is the crushing cup, the shaft outlet is arranged at the bottom of the crushing cup, the dynamic sealing element and the static sealing element are arranged on the outer side of the bottom of the crushing cup, and the static sealing element is connected with the outer wall of the crushing cup in a sealing manner;

or the food processor comprises a base and a crushing cup detachably connected to the base, the crushing motor is fixedly installed in the base, the working cavity is located in the crushing cup, the base is the crushing cup, the output shaft hole is formed in the bottom of the crushing cup, the output shaft is a cutter shaft arranged at the bottom of the crushing cup, the cutter shaft is in transmission connection with a motor shaft of the crushing motor, the dynamic sealing element and the static sealing element are installed on the outer side of the bottom of the crushing cup, and the static sealing element is in sealing connection with the outer wall of the crushing cup.

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