CN215684498U - Open-type power assembly and dough mixing machine - Google Patents

Abstract

The utility model discloses an open type power assembly and a dough mixing machine. An open type power assembly comprises a motor, a front end cover fixed at the output end of the motor, a worm wheel and a worm, wherein the worm wheel and the worm are positioned at the output end of the motor, a motor mounting bracket partially covering the worm wheel and the worm is formed by extending from the end face of the front end cover to the output direction of the worm, the motor mounting bracket and the front end cover are integrally formed, and the ratio of the sum of the weight of the motor mounting bracket and the weight of the front end cover to the weight of the motor is 0.15-0.25. The open-type power component of this scheme both can have good radiating effect, can improve the fastness that motor installing support and motor were fixed again to reduce the resonance risk of power component during operation.

Description

Open-type power assembly and dough mixing machine

Technical Field

The utility model relates to the field of household food processing, in particular to an open type power assembly and a dough mixing machine.

Background

The dough kneading machine is used as a convenient and healthy electric appliance for making cooked wheaten food, and has entered more and more families, so that convenience is brought to the life of people. A typical dough mixer includes a base with a power assembly disposed therein and a dough mixing cup disposed on the base. The existing power assembly comprises a motor, a speed reducing mechanism connected with the motor in a transmission manner, and a motor mounting bracket fixedly connected with an end cover of the motor and clamping the speed reducing mechanism, wherein the speed reducing mechanism comprises a worm wheel and a worm. And the power assembly is divided into a wrapping type power assembly and an open type power assembly according to whether the motor mounting bracket completely wraps the turbine and the worm.

The wrapping type power assembly has the advantages that the turbine and the worm are located in a closed space, the heat dissipation effect is poor, the turbine is easy to deform due to heating after long-time work, and the sliding teeth are arranged at the position of the turbine, so that the whole dough mixing machine cannot work normally. In order to prevent the failure of the motor, an air guide channel is required to be arranged in the base to improve the heat dissipation effect. Some researchers have eliminated the air guide channel and adopted the open power assembly in order to save the cost of the power assembly. However, because the air guide channel is cancelled, the wind direction in the base is disordered, and hot wind cannot be conveyed out from the air outlet of the base, so that the heat dissipation effect of the power assembly is relatively poor even though the open power assembly is adopted. Therefore, how to adjust the relative position relationship between the fan and the worm wheel and worm to enhance the heat dissipation effect is a problem yet to be solved.

Meanwhile, in the open type power assembly, the motor mounting bracket is only partially and fixedly connected with the motor end cover, the strength of clamping the worm wheel and the worm by the motor mounting bracket is lower than that of the wrapped type power assembly, the natural modal frequency is lower, the motor is easy to resonate when working, the power assembly is further damaged, and the service life of the power assembly is shortened. Therefore, how to design the mounting bracket of the open type motor to enable the mounting bracket to be fixed with the motor more firmly, so as to improve the natural modal frequency and reduce the resonance risk becomes a problem to be solved urgently.

In summary, how to provide an open power assembly, which not only has a good heat dissipation effect, but also can improve the firmness of fixing the motor mounting bracket and the motor, thereby reducing the resonance risk of the power assembly during operation, and prolonging the service life of the power assembly, is a problem to be solved urgently.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an open type power assembly and a dough kneading machine comprising the same, which not only have good heat dissipation effect, but also can improve the firmness of fixing a motor mounting bracket and a motor, thereby reducing the resonance risk of the power assembly during working and prolonging the service life of the power assembly and the dough kneading machine.

In order to achieve the purpose, the utility model provides an open type power assembly, which adopts the following technical scheme: an open type power assembly comprises a motor, a front end cover fixed at the output end of the motor, a worm wheel and a worm, wherein the worm wheel and the worm are positioned at the output end of the motor, a motor mounting bracket partially covering the worm wheel and the worm is formed by extending from the end face of the front end cover to the output direction of the worm, the motor mounting bracket and the front end cover are integrally formed, and the ratio of the sum of the weight of the motor mounting bracket and the weight of the front end cover to the weight of the motor is 0.15-0.25.

Preferably, the center of front end housing is provided with the bearing room of evagination and parcel root of living the worm, the terminal surface of bearing room is including being located the up end of worm top, the motor installing support includes integrated into one piece's first support and second support, the second support is followed the up end extends towards the output direction of worm, the part an organic whole that first support is close to the second support is fixed in on the up end, the part an organic whole that the second support was kept away from to first support is fixed in on the terminal surface of front end housing.

Preferably, the first support is horizontally arranged, the second support is bent downwards relative to the first support and covers the tooth part of the worm, the joint of the first support and the second support is in arc transition, and the included angle formed at the joint ranges from 90 degrees to 150 degrees.

Preferably, the motor mounting bracket is perpendicular to the front end cover, the motor mounting bracket comprises a top end surface deviating from the turbine and the worm, a reinforcing plate is arranged at a turning angle formed by the top end surface and the front end cover, one end of the reinforcing plate is connected to the top end surface, and the other end of the reinforcing plate is connected to the front end cover.

Preferably, a fan is arranged at one end of the worm far away from the front end cover, the ratio of the distance between the fan and the center point of the worm gear and the worm meshing to the length of the end face of the worm extending out of the bearing chamber is between 0.4 and 0.7, and the ratio of the diameter of the fan to the diameter of the shell of the motor is between 0.7 and 1.3.

Preferably, the motor mounting bracket is provided with a deflection preventing structure near the fan, one end of the worm near the fan penetrates through the deflection preventing structure to be connected with the fan, and a gap between the worm and the deflection preventing structure is smaller than a horizontal size, in the radial direction of the worm, of the worm meshed with the turbine.

Preferably, the center of the front end cover is provided with a bearing chamber which protrudes outwards and wraps the root of the worm, and the thickness of the motor mounting bracket in the vertical direction is consistent with the radial thickness of the side wall of the bearing chamber.

Preferably, the bottom end face of the turbine is provided with an auxiliary support, the auxiliary support and the motor mounting support clamp the turbine relatively through a fixing part, the auxiliary support partially shields the turbine, and a reinforcing rib is arranged on the bottom face of the auxiliary support, facing the turbine.

Preferably, the auxiliary support comprises a first auxiliary support far away from one side of the worm and a second auxiliary support close to one side of the worm, the first auxiliary support and the second auxiliary support are arranged at intervals, the area of the first auxiliary support is larger than that of the second auxiliary support, and a grounding hole is formed in the first auxiliary support.

The utility model also provides a dough mixer, which comprises a base and a dough mixing cup positioned on the base, and the dough mixer also comprises the open power assembly, wherein the open power assembly is positioned in the base.

The above technical scheme of this application has following beneficial effect:

1. in the application, the motor mounting bracket which is formed by extending the end face of the front end cover to the output direction of the worm and partially covers the turbine and the worm is arranged, so that the whole power assembly is an open power assembly. Compared with the wrapping type power assembly, the open type power assembly has the advantages that heat flow generated by the operation of the motor cannot be gathered in the closed space of the motor mounting bracket wrapping the turbine and the worm, so that the heat dissipation effect of the turbine and the worm is good.

Simultaneously, still through setting up motor installing support and front end housing integrated into one piece for fixed connection between the two is more reliable. Compared with the scheme that the motor mounting bracket and the front end cover are fixed through the screws, the integrally formed scheme has the advantages that the natural modal frequency is reduced, and the probability of resonance generated during the working of the motor is reduced. That is to say, the motor installing support rocks between these two and the motor together with the front end housing and reduces to improve the fastness that motor installing support and motor are fixed, protect power component.

More importantly, the ratio of the sum of the weight of the motor mounting bracket and the front end cover to the weight of the motor is set to be 0.15-0.25, namely the weight of the integrated motor mounting bracket and the front end cover is far smaller than the weight of the motor. Like this, just so make the motor installing support that weight is lighter pass through the one end of the installation to the motor that the front end housing can be relaxed to further promote the fastness that improves motor installing support and motor.

2. The center of the front end cover is provided with a bearing chamber which protrudes outwards and wraps the root of the worm, namely the bearing chamber is used for axially fixing the root of the worm, and the transmission output of the motor to the worm is relatively stable. The terminal surface of bearing room is including being located the up end of worm top is through the first support and the second support that fall into integrated into one piece with the motor installing support, and the second support is followed the up end extends toward the output direction of worm for second support and bearing room form fixed connection, and direct contact between the top cap of separation worm and frame avoids the lubricating oil that throws away on the worm to splash to the top cap.

Simultaneously, through setting up that the part that first support is close to the second support is integrative to be fixed in on the up end, the part that the second support was kept away from to first support is integrative to be fixed in on the terminal surface of front end housing to increase the fixed connection area of first support and front end housing, further strengthen the fixed stability of motor installing support and front end housing. Therefore, the phenomenon that the joint of the front end cover and the motor mounting bracket is cracked in the long-term use process due to the fact that the motor is too heavy can be prevented from occurring on the motor mounting bracket, and the reliability of fixing the motor mounting bracket and the motor is further improved.

3. On one hand, in order to prevent a worker from cutting hands when assembling the motor mounting bracket, the joint of the bent bracket and the plane bracket is arranged to be in arc transition. In order to realize better hoist and mount of first support and top cap ability, set up first support level setting. On the other hand, in order to avoid dirt falling at the meshing part of the worm wheel and the worm and causing the meshing part of the worm wheel and the worm to be blocked, the second bracket is bent downwards relative to the first bracket and covers the tooth part of the worm. And the included angle formed by the connection part is set to be between 90 degrees and 150 degrees, so that the dirt is more easily slid to the bottom cover of the base because the second bracket is a slope if the dirt falls to the top surface of the second bracket.

4. In order to ensure that the motor mounting bracket can fix the worm wheel and the worm and does not interfere with the worm wheel and the worm, the motor mounting bracket is perpendicular to the front end cover. Further, the motor mounting bracket comprises a top end surface deviating from the worm wheel and the worm, and a reinforcing plate is arranged at a turning angle formed by the top end surface and the front end cover. Because the weight of the motor mounting bracket is less than that of the motor, in order to ensure that the motor mounting bracket does not bend or crack at the joint of the motor mounting bracket and the front end cover when the motor mounting bracket is subjected to axial pressure, a reinforcing plate is arranged at a turning angle formed by the top end surface and the front end cover, one end of the reinforcing plate is connected with the top end surface, and the other end of the reinforcing plate is connected with the front end cover.

5. Compared with a wrapped power assembly, the heat dissipation effect of the open type power assembly is improved to a certain extent, but in order to further dissipate heat at the meshing position of the worm wheel and the worm, a fan is arranged at one end, far away from the front end cover, of the worm. It is known that the wind force is greater closer to the fan, and the fan has an axial wind distance at a given rotational speed, and beyond this wind distance, the wind of the fan is not sensed. Therefore, in the scheme, the ratio of the distance from the fan to the center point of the meshing of the worm wheel and the worm to the length of the end face of the worm extending out of the bearing chamber is set to be 0.4-0.7, so that the meshing position of the worm wheel and the worm is in the wind force range of the fan along the axial direction, and larger wind force can be sensed, and the heat dissipation effect of the meshing position of the worm wheel and the worm is further improved.

Meanwhile, in order to provide a better heat dissipation effect for the interior of the motor, the fan is ensured to fan out cold air to enter the interior of the shell as much as possible, and therefore the ratio of the diameter of the fan to the diameter of the shell of the motor is set to be 0.7-1.3, namely the diameter of the fan is in the range slightly larger than the diameter of the shell and slightly smaller than the diameter of the shell, so that the fan can send the cold air into the interior of the shell as much as possible, and the heat dissipation efficiency of the interior of the motor is improved.

6. Because only depend on the bearing chamber to carry out radial spacing to the root of worm, can lead to the output of worm, that is to say the one end that the worm is close to the fan easily produces in the course of the work and rocks to lead to worm and turbine to break away from the engaged state and take place to take off the tooth phenomenon. In the case of severe shaking, even breakage of the worm may occur. Therefore, the position, close to the fan, of the motor mounting bracket is provided with the deflection preventing structure, and one end, close to the fan, of the worm penetrates through the deflection preventing structure to be connected with the fan, so that the radial shaking of the output end of the worm is reduced. And the clearance between the worm and the deflection preventing structure is smaller than the horizontal size of the worm meshed with the worm wheel along the radial direction of the worm, so that the assembly mode of the deflection preventing structure and the worm is simplified, the output end of the worm only slightly deflects under the severe vibration of a motor or the shaking process of a machine base of the deflection preventing structure, but the deflection is not enough to separate the worm from the worm wheel and break the worm, and the radial shaking of one end of the worm close to the fan is effectively reduced.

7. In order to facilitate the motor mounting bracket to integrally extend from the bearing chamber and simplify the processing technology, the center of the front end cover is provided with the bearing chamber which protrudes outwards and wraps the root of the worm, and the thickness of the motor mounting bracket along the vertical direction is consistent with the radial thickness of the side wall of the bearing chamber. The thickness of the motor mounting bracket is consistent with that of the front end cover, and the connection attractiveness of the motor mounting bracket and the front end cover is improved.

8. Through set up the auxiliary stand at the bottom face of turbine, the auxiliary stand passes through the relative centre gripping of mounting bracket with the motor mounting bracket the turbine to the messenger the auxiliary stand further axial fixity turbine with motor mounting bracket support cooperation prevents that the turbine from rocking and skew along the axial to harm whole power component's working property. Simultaneously, still set up the auxiliary stand only partially shelters from the bottom face of turbine for the radiating effect of turbine department is good, can also reduce the cost that the auxiliary stand made. The bottom surface of the auxiliary support facing the turbine is provided with a reinforcing rib to strengthen the structural strength of the auxiliary support and ensure the stability of the auxiliary support and the motor mounting support for clamping the turbine.

9. By dividing the auxiliary support into a first auxiliary support and a second auxiliary support, the cost of the auxiliary support is further reduced. The more far away from one side of the worm, the poorer the stability of the worm wheel is, and the more easily the worm wheel shakes, so that the area for arranging the first auxiliary support is larger in order to improve the stability of the worm wheel far away from the side of the worm; in contrast, the side, close to the worm, of the worm wheel is stable, so that the area of the second auxiliary support can be properly reduced, the fixing reliability of the worm wheel can be ensured, and the shaking is reduced. Therefore, the fixing reliability of the turbine 26 is improved, and the material cost of the auxiliary bracket 27 is reduced, thereby providing a high-quality and low-price product for users. In addition, still be equipped with the ground connection hole on the first auxiliary stand for connect the earth connection.

It should be noted that, in the following description,

the application provides a technical scheme of flour-mixing machine has following beneficial effect:

1. the open type power assembly is applied to the dough mixer, namely the open type power assembly is positioned in the base, and the dough mixing cup is positioned on the base, so that heat generated at the turbine and the worm is effectively dissipated in the operation process of the dough mixer. When integrated into one piece's motor installing support and front end housing are fixed in on the motor, it is fixed convenient and reliable, reduced the resonance risk of natural modal frequency and motor during operation to the work and the life of extension power component. That is to say, the life of flour-mixing machine has also fine protection and extension, and resonance risk and natural modal frequency's reduction for the noise of power component operation in-process reduces to some extent, rocks the reduction, thereby guarantees flour-mixing machine's stability and silence effect.

Drawings

The utility model is described in further detail below with reference to the accompanying drawings:

FIG. 1 is an exploded view of a dough mixer in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural view of an open power module according to an embodiment of the present invention;

FIG. 3 is a side view of an open power assembly according to one embodiment of the present invention;

FIG. 4 is a schematic structural view of an auxiliary support of an open power module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a front end cover and a motor mounting bracket according to an embodiment of the present invention;

fig. 6 is another schematic structural diagram of a front end cover and a motor mounting bracket according to an embodiment of the utility model;

FIG. 7 is a schematic view of the structure of the motor mounting bracket and the auxiliary bracket relative to the clamping worm gear according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a bottom surface of the auxiliary bracket facing the turbine according to an embodiment of the present invention.

The corresponding reference numbers for the component names in the figures are as follows:

1. a machine base; 11. a top cover; 12. a bottom cover; 2. an open power assembly; 21. a motor; 22. a motor mounting bracket; 221. a first bracket; 2211. a top end face; 2212 bottom end face; 222. a second bracket; 2221. a deflection preventing structure; 23. a front end cover; 231. a bearing chamber; 2311. an upper end surface; 232. an arc-shaped notch; 24. a worm; 25. a fan; 26. a turbine; 27. an auxiliary support; 271. a first auxiliary support; 272. a second auxiliary support; 2711. a ground hole; 273. reinforcing ribs; 274. a positioning column; 275. a bearing seat; 276. a drive shaft; 28. a reinforcing plate; 3. a dough kneading cup; 31. a dough kneading knife; 32. a cup cover.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific examples. It is to be understood that the embodiments represent only possible variations, individual components and functions are optional unless explicitly required, and the terms "comprises", "comprising" or any other variation thereof herein are intended to cover a non-exclusive inclusion, such that a process, method or apparatus that comprises a list of elements does not include only those elements but also other elements not explicitly listed, for purposes of making the objects, aspects and advantages of the embodiments of the present invention more apparent, and the embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. "upper", "lower", "front", "rear", "left", "right", "top", "bottom", and the like are used merely to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships may also be changed accordingly.

As shown in fig. 1 to 7, the present invention provides an open power assembly and a dough mixer. As shown in fig. 2 to 7, the present invention provides an open type power assembly, the open type power assembly 2 includes a motor 21, a front end cover 23 fixed to an output end of the motor 21, a worm wheel 26 and a worm 24 located at the output end of the motor 21, a structure partially covering the worm wheel 26 and the worm is a motor mounting bracket 22, and the motor mounting bracket 22 is formed by extending from an end face of the front end cover 23 to an output direction of the worm 24. Because the motor mounting bracket 22 only partially covers the worm gear 26 and worm 24, there are exposed portions of the worm gear 26 and worm 24. Then, compared with the wrapped power assembly, the heat flow generated by the operation of the motor cannot be collected in the closed space of the motor mounting bracket wrapping the turbine 26 and the worm 24, so that the heat dissipation effect at the turbine 26 and the worm 24 is better.

Meanwhile, the motor mounting bracket 22 and the front end cover 23 are integrally formed, so that the fixed connection between the motor mounting bracket 22 and the front end cover 23 is more reliable, namely the motor mounting bracket 22 and the front end cover 23 are integrally cast and formed. Compared with the scheme that the motor mounting bracket 22 and the front end cover 23 are fixed through screws, the integrally formed scheme has the advantages that the natural modal frequency is reduced, and the probability of resonance generated during the operation of the motor is reduced. That is, the sloshing between the motor mounting bracket 22 and the front end cover 23 and the motor 21 is reduced, so that the fixation firmness of the motor mounting bracket 22 and the motor 21 is improved, and the open-type power assembly 2 is protected.

Since the motor mounting bracket 22 and the front cover 23 are integrally formed, the motor mounting bracket 22 and the front cover 23 can be regarded as a whole, and the ratio of the sum of the weights of the whole to the weight of the motor is set to be between 0.15 and 0.25, which is equivalent to the ratio of the sum of the weights of the motor mounting bracket 22 and the front cover 23 to the weight of the motor 21 to be between 0.15 and 0.25. That is, the weight of the integrated motor mounting bracket 22 and front cover 23 is much less than the weight of the motor 21 itself. Thus, the motor mounting bracket 22 with light weight can be easily mounted to one end of the motor 3 through the front end cover 23, and the fixation firmness of the motor mounting bracket 22 and the motor 21 is further improved.

Further, as shown in fig. 2 to 4, the front cover 23 is provided at its center with a bearing housing 231 protruding outward and enclosing the root of the worm 24. That is, the bearing chamber 231 serves to axially fix the root of the worm 24 and to make the transmission output of the motor 21 to the worm 24 relatively stable. The upper and lower positions shown in fig. 2 and 3 refer to the relative positions of the open power module 2 when it is placed, and the upper position appearing hereinafter is also defined as such. As shown in fig. 4 and 6, the end surface of the bearing chamber 231 includes an upper end surface 2311 located above the worm 24. The upper end surface 2311 is an end surface of the bearing chamber 231 from a dotted line to the direction of the first bracket 221 shown in fig. 6. The motor mounting bracket 22 is divided into a first bracket 221 and a second bracket 222 which are integrally formed. The second bracket 222 extends from the upper end face in the direction of the output of the worm 24, so that the second bracket 222 forms a fixed connection with the bearing chamber 231. The existence of the second bracket 222 prevents the worm 24 from directly contacting with the top cover 11 of the machine base 1, and prevents the lubricating oil thrown off from the worm 24 from splashing to the top cover 11.

Meanwhile, as shown in fig. 5 to 7, a portion of the first bracket 221 adjacent to the second bracket 222 is integrally fixed to the upper end surface 2311. The portion of the first bracket 221 away from the second bracket 222 is integrally fixed on the end surface of the front end cover 23 to increase the fixed connection area of the first bracket 221 and the front end cover 23, thereby further enhancing the stability of fixing the motor mounting bracket 22 and the front end cover 23. Therefore, the phenomenon that the joint of the end face of the front end cover 23 and the motor mounting bracket 22 is cracked in the long-term use process of the motor mounting bracket 22 due to the overweight of the motor 21 can be prevented, and the fixing reliability of the motor mounting bracket 22 and the motor 21 is further improved.

Further, as shown in fig. 2 and 3, in the state where the open type power module 2 is erected, the first bracket 221 is horizontally disposed, and the second bracket 222 is bent downward with respect to the first bracket 221 and covers the teeth of the worm 24. The first support 221 is horizontally arranged so that the first support 221 and the top cover 11 can be lifted better. Further, in order to prevent a worker from cutting his hand when assembling the motor mounting bracket 22, the intersection of the first bracket 221 and the second bracket 222 transitions in an arc. In addition, the intersection forms an included angle ranging from 90 ° to 150 °. The angle at the junction is the angle a shown in fig. 3, which is the angle formed by the intersection of the first bracket 221 and the second bracket 222. The angle a ranges between 90 ° and 150 ° so that dirt, assuming it falls onto the top surface of the second rack 222, is more likely to slide down onto the bottom cover 12 of the housing 1 because the second rack 222 is a ramp.

In addition, as shown in fig. 4, in order to facilitate the motor mounting bracket 22 to integrally extend from the bearing chamber 231 and simplify the manufacturing process, a bearing chamber 231 protruding outward and wrapping the root of the worm 24 is provided at the center of the front end cover 231. Also, as shown in fig. 3, the thickness of the motor mounting bracket 22 in the vertical direction is d1, the radial thickness of the sidewall of the bearing chamber 231 is d2, and the value of d1 is equal to the value of d 2. That is, the thickness of the motor mounting bracket 22 in the vertical direction coincides with the radial thickness of the side wall of the bearing chamber 231. The value of d1 is equal to the value of d2, which enhances the aesthetic appearance of the motor mounting bracket 22 in connection with the front cover 23.

In some embodiments of the present invention, as shown in fig. 2-4, to ensure that the motor mounting bracket 22 can both secure the worm gear 26 and worm 24 and not interfere with the worm gear 26 and worm 24, the motor mounting bracket 22 is disposed perpendicular to the front cover 23.

Further, as shown in fig. 5 and 6, the motor mounting bracket 22 includes a top end surface 22 facing away from the worm gear 26 and worm 24, and a bottom end surface 2212 facing the worm gear 26 and worm 24. Since the weight of the motor mounting bracket 22 is less than that of the motor 21, in order to ensure that the motor mounting bracket 22 does not bend or deform or crack at the joint between the motor mounting bracket 22 and the front end cover 23 when being pressed in the axial direction, a reinforcing plate 28 is disposed at the corner formed by the top end surface 2211 of the motor mounting bracket 22 and the front end cover 23. As shown in fig. 5 to 7, the reinforcing plate 28 has one end connected to the distal end surface 2211 and the other end connected to the distal end cover 23. The number of reinforcing plates 28 is preferably set to 1 to 4 times, preferably 2.

In some embodiments of the utility model, as shown in fig. 2 and 4, the side of the worm 24 remote from the motor 21 is provided with a fan 25. Because the power component in this application is open power component 2, compare the power component of parcel formula, its radiating effect has certain promotion. However, in order to further dissipate heat from the engagement between the worm wheel 26 and the worm 24, a fan 25 is provided on the side of the worm 24 remote from the motor 21.

It is known that the wind force is greater closer to the fan 25, and that the fan 25 has an axial wind distance at a given rotational speed, beyond which the wind of the fan 25 is not felt. As shown in fig. 4, the distance between the fan 25 and the center point of the worm gear 24 and the worm wheel 26 is L1, the length of the end surface of the worm gear 24 extending out of the bearing chamber 231 is L2, and the ratio of L1 to L2 ranges from 0.4 to 0.7. That is, in the present embodiment, the ratio of the distance from the fan 25 to the center point of the worm gear 26 and the worm 24 to the length of the end surface of the worm extending out of the bearing housing is 0.4 to 0.7. This ratio range enables the meshing position of the turbine 26 and the worm 24 to be within the wind force range of the fan 25 along the axial direction, and can sense relatively large wind force, thereby further improving the heat dissipation effect of the meshing position of the turbine 26 and the worm 24.

Meanwhile, in order to provide a better heat dissipation effect to the inside of the motor 21, it is necessary to ensure that the fan 25 fans out cool air to enter the inside of the housing as much as possible. For this reason, in the present embodiment, the ratio of the diameter of the fan 25 to the casing diameter of the motor 21 is set to be between 0.7 and 1.3. That is, the diameter of the fan 25 is slightly larger than the diameter of the casing and slightly smaller than the diameter of the casing, so that the fan 25 can send as much cold air into the casing as possible, and the heat dissipation efficiency of the inside of the motor 21 is improved.

It should also be noted that the end surface of the front end cover 23 is provided with arc-shaped notches 232, the arc-shaped notches 232 are non-uniformly distributed along the circumferential direction of the front end cover 23, the number of the arc-shaped notches is set to C, and the range of C is 3 to 5. The setting of arc breach 232 further increases the air convection of motor 21 and outside, does benefit to the heat dissipation, reduces motor 21's temperature rise. Of course, the arc-shaped notch 232 is not limited to the shape shown in the drawings, and may have other shapes, such as square, circle, rectangle, etc.

Since the root of the worm 24 is limited only by the bearing chamber 231 in the radial direction, the output end of the worm 24, that is, the end of the worm 24 close to the fan 25 is prone to shaking during the working process, so that the worm 24 and the turbine 26 are disengaged to cause the gear-disengaging phenomenon. In the case of severe shaking, it may even happen that the worm 24 breaks. Thus, as shown in fig. 3, 4 and 6, in the embodiment of the present invention, a deflection preventing structure 2221 is disposed at the position of the motor mounting bracket 22 close to the fan 25, and one end of the worm 24 close to the fan 25 passes through the deflection preventing structure 2221 to be connected with the fan 25, so as to reduce the radial shaking of the output end of the worm 24.

Moreover, the clearance between the worm 24 and the anti-deflection structure 2221 is smaller than the horizontal dimension of the worm 24 engaged with the worm wheel 26 along the radial direction of the worm 24, so that the assembly mode of the anti-deflection structure 2221 and the worm 24 is simplified, and meanwhile, the output end of the worm 24 has only slight deflection under the severe vibration of the motor 21 or the shaking process of the machine base 1 of the anti-deflection structure 2221. However, this deflection is insufficient to disengage the worm 24 from the worm gear 26 and to break the worm 24, thereby effectively reducing radial wobble of the end of the worm 24 adjacent the fan 25.

The reduction ratio of the worm wheel 26 and the worm 24 is D, and D ranges from 40 to 60. The reduction ratio D of the worm wheel 26 and the worm 24 is between 40 and 60, so that the working efficiency of the motor 21 is optimized, and the possibility that lubricating oil on the worm wheel 26 and the worm 24 splashes out to pollute the machine base is reduced as much as possible. Even more, the phenomenon that the turbine 26 and the worm 24 are locked and cannot normally operate due to excessive splashing lubricating oil can be prevented.

Further, in some embodiments of the present invention, as shown in fig. 3, 4 and 7, an auxiliary bracket 27 is disposed at a bottom end surface of the turbine 26, and the auxiliary bracket 27 and the motor mounting bracket 22 clamp the turbine 26 by a fixing member. The fixing piece is made of materials for fastening such as a stud and a screw. This arrangement allows the auxiliary bracket 27 to cooperate with the motor mounting bracket 22 to further axially fix the turbine 26, preventing the turbine 26 from wobbling and shifting in the axial direction, thereby impairing the workability of the entire power assembly. Meanwhile, the auxiliary support 27 is arranged to only partially shield the bottom end face of the turbine 26, so that the heat dissipation effect of the turbine 26 is good, and the manufacturing cost of the auxiliary support 27 can be reduced.

As shown in fig. 7 and 8, the bottom surface of the auxiliary bracket 27 facing the turbine 26 is provided with a reinforcing rib 273 to enhance the structural strength of the auxiliary bracket 27 and ensure the stability of the auxiliary bracket 27 and the motor mounting bracket 22 clamping the turbine. Wherein, the center of the auxiliary bracket 27 is provided with a bearing seat 275 for accommodating the driving shaft 276, the edge of the auxiliary bracket 27 is provided with a plurality of positioning posts 274, wherein the reinforcing rib 273 is connected between the positioning posts 274 and the bearing seat 275, thereby enhancing the reliability of the connection between the bearing seat 275 and both the first auxiliary bracket 271 and the second auxiliary bracket 272.

Specifically, as shown in fig. 4, the auxiliary stand 27 further includes a first auxiliary stand 271 and a second auxiliary stand 272, and the first auxiliary stand 271 and the second auxiliary stand 272 are discontinuously disposed, so as to further reduce the cost of the auxiliary stand 27. Since the farther the worm wheel 26 is from the side of the worm 24, the less smooth the worm wheel 26 is, the more easily it will wobble. Accordingly, the area of the first auxiliary holder 271 is increased to improve the stability of the worm wheel 26 away from the worm 24. On the other hand, the worm wheel 26 is stable on the side close to the worm 24, so that the area of the second auxiliary bracket 272 can be reduced appropriately, the fixing reliability of the worm wheel 26 can be ensured, and the shaking can be reduced. Therefore, the turbine fixing device can be used as best as possible, the purpose of improving the turbine fixing reliability is achieved, the material cost of the auxiliary support can be reduced, and a high-quality and low-price product is provided for users. In addition, the first auxiliary bracket 271 is further provided with a ground hole 2711, and the ground hole 2711 is used for connecting a ground wire. The grounding hole 2711 and the horizontal projection of the turbine 26 do not interfere with each other, so that the grounding wire is prevented from interfering with the turbine 26 when passing through the grounding hole 2711.

It should be noted that the auxiliary stands 27 are not limited to only include the first auxiliary stand 271 and the second auxiliary stand 272, and may include a plurality of auxiliary stands, and the distribution manner is not limited to the distribution manner shown in the drawings.

In some embodiments of the present invention, as shown in fig. 1, the present invention also provides a dough mixer comprising a base 1, a dough cup 3 located on the base of the machine 1. The motor further comprises an open power module 2 as described in any of the previous embodiments, the open power module 2 being located inside the machine base 1.

The open power assembly 2 in any one of the embodiments is applied to the dough mixer, that is, the open power assembly 2 is located inside the machine base 1, and the dough mixing cup 3 is located on the machine base 1, so that heat generated at the turbine 26 and the worm 24 is effectively dissipated during the operation of the dough mixer. The open end cover of the dough kneading cup 3 is provided with a cup cover 32 for preventing flour from splashing, a dough kneading knife 31 is arranged in the dough kneading cup 3, the dough kneading knife 31 is used for stirring flour and water, and the dough kneading knife 31 rotates under the transmission action of the open power component 2 to realize the dough kneading function.

Meanwhile, as shown in fig. 2 to 4, when the integrally formed motor mounting bracket 22 and the front end cover 23 are fixed on the motor 21, the fixing is convenient and reliable, and the natural modal frequency and the resonance risk of the motor 21 during operation are reduced, so that the operation and the service life of the open type power assembly 2 are prolonged. That is to say, the life of flour-mixing machine has also fine protection and extension, and resonance risk and natural modal frequency's reduction for the noise of open-type power component 2 operation in-process reduces to some extent, rocks the reduction, thereby guarantees flour-mixing machine's stability and silence effect.

It should be noted that the open type power module 2 described in any of the above embodiments is not limited to be used in a dough mixer, and may be used in other food processing machines such as a noodle maker, a food processor, a bread maker, and the like.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above-described embodiments, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the utility model should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the embodiments of the utility model as disclosed, and the scope of the embodiments of the utility model as defined by the appended claims and their equivalents is deemed to be within the scope of the utility model.

Claims (10)

1. An open type power assembly comprises a motor, a front end cover fixed at the output end of the motor, a worm wheel and a worm, and is characterized in that a motor mounting bracket partially covering the worm wheel and the worm is formed by extending from the end face of the front end cover to the output direction of the worm, the motor mounting bracket and the front end cover are integrally formed, and the ratio of the sum of the weights of the motor mounting bracket and the front end cover to the weight of the motor is 0.15-0.25.

2. The open power assembly of claim 1, wherein the front end cap is provided at a center thereof with a bearing chamber protruding outward and surrounding a root of the worm, an end surface of the bearing chamber includes an upper end surface located above the worm, the motor mounting bracket includes a first bracket and a second bracket integrally formed, the second bracket extends from the upper end surface in an output direction of the worm, a portion of the first bracket close to the second bracket is integrally fixed to the upper end surface, and a portion of the first bracket far from the second bracket is integrally fixed to the end surface of the front end cap.

3. The open power assembly of claim 2, wherein the first support is horizontally disposed, the second support is bent downward relative to the first support and covers the teeth of the worm, the junction of the first support and the second support transitions in an arc, and the included angle formed by the junction ranges from 90 ° to 150 °.

4. The open power assembly of claim 1, wherein the motor mounting bracket is perpendicular to the front end cap, the motor mounting bracket comprises a top end surface facing away from the worm wheel and the worm, a reinforcing plate is arranged at a turning angle formed by the top end surface and the front end cap, one end of the reinforcing plate is connected to the top end surface, and the other end of the reinforcing plate is connected to the front end cap.

5. The open power assembly of claim 1, wherein the end of the worm remote from the nose cap is provided with a fan, the ratio of the distance of the fan from the center point of the worm gear, worm mesh, to the length of the end face of the worm extending beyond the bearing chamber is between 0.4 and 0.7, and the ratio of the diameter of the fan to the diameter of the motor housing is between 0.7 and 1.3.

6. The open power assembly of claim 5, wherein the motor mounting bracket is provided with a deflection preventing structure near the fan, one end of the worm near the fan penetrates through the deflection preventing structure to be connected with the fan, and a gap between the worm and the deflection preventing structure is smaller than a horizontal dimension of the worm in the radial direction of the worm, which is meshed with the worm wheel.

7. The open power assembly of claim 1, wherein the center of the front end cover is provided with a bearing chamber which protrudes outwards and wraps the root of the worm, and the thickness of the motor mounting bracket in the vertical direction is consistent with the radial thickness of the side wall of the bearing chamber.

8. The open power assembly of claim 1, wherein the bottom end face of the turbine is provided with an auxiliary support, the auxiliary support and the motor mounting support clamp the turbine relatively through a fixing piece, the auxiliary support partially covers the turbine, and the bottom face of the auxiliary support, facing the turbine, is provided with a reinforcing rib.

9. The open power assembly of claim 8, wherein the auxiliary supports comprise a first auxiliary support on one side far away from the worm and a second auxiliary support on one side close to the worm, the first auxiliary support and the second auxiliary support are arranged at a distance, the area of the first auxiliary support is larger than that of the second auxiliary support, and the first auxiliary support is provided with a grounding hole.

10. A dough mixer comprising a frame, a dough mixing cup located on the frame, wherein the dough mixer further comprises an open power assembly according to any of claims 1-9, said open power assembly being located inside said frame.

Images