Transmission and food processing apparatus

Abstract

The utility model discloses a kind of transmission and food processing equipment, it is related to household electrical appliances technical field, wherein, transmission includes shell, motor, speed reduction mechanism and output piece;Motor is located at the side of shell;Speed reduction mechanism includes the first inner gear ring, second inner gear ring, sun gear and planetary gear being located in shell, the first inner gear ring is fixedly connected with shell, second inner gear ring rotation is located in shell, sun gear is connected with the output shaft of motor, planetary gear is engaged with sun gear, planetary gear is engaged with the first inner gear ring simultaneously, second inner gear ring;Wherein, the number of teeth of the first inner gear ring and the number of teeth of second inner gear ring are different;Output piece and second inner gear ring transmission connection;The technical scheme provided by the utility model can reduce the number of parts, reduce material and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to a transmission device and food processing equipment. Background Technology

[0002] Food processing equipment is a multi-functional kitchen appliance that can stir or process food. After the motor of the food processing equipment is powered on, it drives the output components to rotate through a reduction gearbox. With different processing attachments, it can perform functions such as stirring and kneading. However, because ordinary motors have relatively high speeds, a large gear ratio is needed to achieve low-speed output (around 120-250 rpm). Currently, multi-stage reduction mechanisms are commonly used for transmission, but a large number of transmission stages means a large number of gears and parts, resulting in higher transmission noise and cost. Utility Model Content

[0003] The main purpose of this invention is to provide a transmission device and food processing equipment that aims to reduce the number of parts and lower material and manufacturing costs.

[0004] To achieve the above objectives, the transmission device proposed in this utility model includes a housing, a motor, a reduction mechanism, and an output component;

[0005] The motor is located on one side of the housing;

[0006] The reduction mechanism includes a first internal gear ring, a second internal gear ring, a sun gear, and planet gears disposed within the housing. The first internal gear ring is fixedly connected to the housing, the second internal gear ring is rotatably disposed within the housing, the sun gear is connected to the output shaft of the motor, the planet gears mesh with the sun gear, and the planet gears mesh with both the first internal gear ring and the second internal gear ring simultaneously. The number of teeth on the first internal gear ring and the second internal gear ring are different.

[0007] The output component is connected to the second internal gear ring via a transmission.

[0008] In one embodiment, the transmission device further includes a first bevel gear and a second bevel gear disposed within the housing, the first bevel gear being connected to the second internal gear ring, the second bevel gear meshing with the first bevel gear, and the output component being connected to the second bevel gear.

[0009] In one embodiment, the second internal gear ring and the first bevel gear are integrally formed.

[0010] In one embodiment, the reduction mechanism further includes a planetary carrier and a plurality of fixed shafts, wherein the plurality of fixed shafts are disposed on the planetary carrier;

[0011] The deceleration mechanism includes a plurality of planetary gears, each of which is fitted onto a fixed shaft.

[0012] In one embodiment, an annular groove is formed at the end of the fixed shaft away from the planet carrier;

[0013] The deceleration mechanism also includes multiple retaining rings, each of which is sleeved in one of the annular grooves.

[0014] In one embodiment, the outer peripheral wall of the first internal gear ring is provided with at least two limiting protrusions;

[0015] The inner wall of the housing is formed with at least two limiting grooves, and each limiting protrusion is engaged with one of the limiting grooves.

[0016] In one embodiment, the first internal gear ring has a positioning groove;

[0017] The second internal gear ring has a positioning protrusion, which is inserted into the positioning groove.

[0018] In one embodiment, the motor is connected to the housing by screws.

[0019] In one embodiment, the transmission device further includes a third bevel gear, which is located at the end of the housing away from the motor, and meshes with the second bevel gear.

[0020] This utility model also proposes a food processing device, including the transmission device as described above.

[0021] In the technical solution of this utility model, after the motor starts, the output shaft drives the sun gear to rotate at high speed; the sun gear drives the planet gears to rotate around their own axes. Since the planet gears mesh with the fixed first internal gear ring, the planet gears are forced to revolve around the sun gear while rotating on their own axes; at the same time, the planet gears mesh with the rotatable second internal gear ring, transmitting part of the power to the second internal gear ring, which further transmits the power to the output component through a linkage assembly. The structure of the first internal gear ring, the second internal gear ring, and the planet gears meshing together forms a double reduction, and a large reduction ratio can be achieved with a single-stage mechanism, significantly reducing the number of parts and lowering material and manufacturing costs; moreover, the transmission stages are few, the transmission is smooth, the transmission efficiency is high, and the noise is low. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of the transmission device provided by this utility model;

[0024] Figure 2 A cross-sectional view of an embodiment of the transmission device provided by this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 A cross-sectional view of another embodiment of the transmission device provided by this utility model;

[0027] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0028] Explanation of icon numbers:

[0029] 1000. Transmission device; 1. Housing; 2. Motor; 3. Output component; 4. First internal gear ring; 401. Limiting protrusion; 5. Second internal gear ring; 501. Positioning protrusion; 6. Sun gear; 7. Planet carrier; 8. Planet gear; 9. First bevel gear; 10. Second bevel gear; 11. Fixed shaft; 12. Snap ring; 13. Third bevel gear.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] This utility model proposes a transmission device 1000.

[0035] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 In one embodiment of this utility model, the transmission device 1000 includes a housing 1, a motor 2, a reduction mechanism, and an output component 3; the motor 2 is located on one side of the housing 1; the reduction mechanism includes a first internal gear ring 4, a second internal gear ring 5, a sun gear 6, and planet gears 8 disposed within the housing 1; the first internal gear ring 4 is fixedly connected to the housing 1; the second internal gear ring 5 is rotatably disposed within the housing 1; the sun gear 6 is connected to the output shaft of the motor 2; the planet gears 8 mesh with the sun gear 6; and the planet gears 8 simultaneously mesh with both the first internal gear ring 4 and the second internal gear ring 5; wherein the number of teeth on the first internal gear ring 4 is different from the number of teeth on the second internal gear ring 6; the output component 3 is connected to the second internal gear ring 5 in a transmission manner.

[0036] The housing 1 is the main support structure of the transmission device 1000, and is usually made of metal or high-strength engineering plastic, with an internal cavity to accommodate the reduction gear. A mounting section is provided on one side of the housing 1 for fixing the motor 2.

[0037] Motor 2 is fixed to one side of housing 1 by screws, and its output shaft extends into housing 1. Motor 2 is either a DC motor or an AC motor, providing initial power input.

[0038] The reduction mechanism is an NGWN-type planetary gear mechanism, where N indicates internal meshing, G indicates a common gear, and W indicates external meshing. The number of teeth on the first internal gear ring 4 differs from the number of teeth on the second internal gear ring 6, thus ensuring a better reduction effect.

[0039] In the technical solution of this utility model, after the motor 2 starts, the output shaft drives the sun gear 6 to rotate at high speed; the sun gear 6 drives the planet gears 8 to rotate around their own axis. Since the planet gears 8 mesh with the fixed first internal gear ring 4, the planet gears 8 are forced to revolve around the sun gear 6 while rotating on their own axis; at the same time, the planet gears 8 mesh with the rotatable second internal gear ring 5, transmitting part of the power to the second internal gear ring 5, which further transmits the power to the output component 3 through a linkage component. The structure of the first internal gear ring 4, the second internal gear ring 5, and the planet gears 8 in a compound meshing manner forms a double reduction, and a large reduction ratio can be achieved with a single-stage mechanism, significantly reducing the number of parts and lowering material and manufacturing costs; moreover, the transmission stages are few, the transmission is smooth, the transmission efficiency is high, and the noise generation is low.

[0040] Specifically, in one embodiment of this utility model, please refer to... Figure 2 The transmission device also includes a first bevel gear 9 and a second bevel gear 10 housed within the housing 1. The first bevel gear 9 is connected to the second internal gear ring 5, and the second bevel gear 10 meshes with the first bevel gear 9. The output component 3 is connected to the second bevel gear 10. The first bevel gear 9 is fixedly connected to the second internal gear ring 5, and the axis of the first bevel gear 9 is parallel to the axis of the motor 2. The axis of the second bevel gear 10 is perpendicular to and intersects the axis of the first bevel gear 9. The second bevel gear 10 and the first bevel gear 9 mesh perpendicularly to each other, forming a bevel gear pair with a 90° transmission. The output component 3 is a vertically arranged output shaft, the upper part of which is connected to the center hole of the second bevel gear 10 via a spline to achieve synchronous rotation. The lower end of the output component 3 extends out of the housing 1 and is used to install food processing accessories (such as shredder blades, juicing components, etc.) that require vertical power input. After the motor 2 drives the reduction mechanism to work, the second internal gear ring 5 obtains rotation after being reduced by the NGWN mechanism. The second internal gear ring 5 drives the first bevel gear 9 connected to it to rotate synchronously. The first bevel gear 9 drives the meshing second bevel gear 10 to rotate, thereby changing the power transmission direction from horizontal to vertical. Finally, the output component 3, connected to the second bevel gear 10, outputs power at low speed and high torque to drive the accessories. Through the cooperation of the first bevel gear 9 and the second bevel gear 10, a 90° change in the power transmission direction is achieved, allowing the axis of the output component 3 to be flexibly arranged with the axis of the motor 2, greatly improving the flexibility and adaptability of the transmission device 1000 in the layout of kitchen appliances.

[0041] Furthermore, in one embodiment of this utility model, please refer to... Figure 2The second internal gear ring 5 and the first bevel gear 9 are integrally formed. Specifically, this component is a single, integral mechanical part. One end is the internal gear ring with internal teeth, and the other end is the bevel gear with external bevel teeth. These two functional parts are formed in one step during the same manufacturing process, without any connecting interfaces or assembly marks, forming a continuous and complete component from the internal gear ring to the bevel gear. In this way, the second internal gear ring 5 and the first bevel gear 9 do not require additional connecting parts, resulting in better mechanical strength and fatigue resistance, extending the service life of the entire transmission device 1000, and also allowing for smaller axial or radial dimensions, making the transmission device 1000 more compact.

[0042] Specifically, in one embodiment of this utility model, please refer to... Figure 3 The reduction mechanism also includes a planetary carrier and more than 7 fixed shafts 11, with the fixed shafts 11 disposed on the planetary carrier 7; the reduction mechanism includes multiple planetary gears 8, each planetary gear 8 being fitted onto a fixed shaft 11. Multiple mounting holes are evenly distributed around the circumference of the sun gear 6 on the planetary carrier 7. The number of fixed shafts 11 is the same as the number of planetary gears 8 (three or four). One end of each fixed shaft 11 is fixedly installed in the corresponding mounting hole of the planetary carrier 7 by interference fit or press-fit.

[0043] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 The fixed shaft 11 has an annular groove at the end away from the planet carrier 7. The reduction mechanism also includes multiple retaining rings 12, each retaining ring 12 being fitted into an annular groove. The outer diameter of the retaining ring 12 is larger than the diameter of the inner hole of the planet gear 8, thereby effectively positioning the planet gear 8 axially between the planet carrier 7 and the retaining ring 12, preventing it from axially moving on the fixed shaft 11.

[0044] Specifically, in one embodiment of this utility model, please refer to... Figure 4 and Figure 5The outer peripheral wall of the first internal gear ring 4 is provided with at least two limiting protrusions 401; the inner wall of the housing 1 is formed with at least two limiting grooves, and each limiting protrusion 401 is engaged with a limiting groove. At least two limiting protrusions 401 are uniformly provided along the circumferential direction on the outer peripheral wall of the first internal gear ring 4. These limiting protrusions 401 can be block-shaped, wedge-shaped, or arc-shaped bosses integrally formed with the first internal gear ring 4. On the inner wall of the housing 1, at positions corresponding to the limiting protrusions 401, at least two limiting grooves are formed. The shape of the limiting grooves matches the shape of the limiting protrusions 401, and their size is slightly larger than that of the limiting protrusions 401 to facilitate assembly. Each limiting protrusion 401 is precisely engaged in a limiting groove. The engagement of multiple limiting protrusions 401 with limiting grooves restricts the freedom of the first internal gear ring 4 in circumferential rotation and radial movement, thereby ensuring the accuracy of the relative position between the first internal gear ring 4 and the sun gear 6 and planet gears 8, and ensuring the consistency of the meshing accuracy between the multiple planet gears 8 and the internal gear ring.

[0045] Furthermore, in one embodiment of this utility model, please refer to... Figure 2 and Figure 3 The first internal gear ring 4 has a positioning groove; the second internal gear ring 5 has a positioning protrusion 501, which is inserted into the positioning groove. The end face of the first internal gear ring 4 facing the second internal gear ring 5 has an annular positioning groove, and the corresponding end face of the second internal gear ring 5 has an annular positioning protrusion 501. The shape of the positioning protrusion 501 precisely complements the shape of the positioning groove on the first internal gear ring 4. In the final assembled state, the positioning protrusion 501 of the second internal gear ring 5 is precisely inserted into the positioning groove of the first internal gear ring 4. A precise axial and radial fit is formed between them. It should be noted that "insertion" here refers to a precise fit, not a fixed connection; the second internal gear ring 5 can still rotate freely within the housing 1. The fit between the positioning protrusion 501 and the positioning groove ensures the coaxiality of the first internal gear ring 4 and the second internal gear ring 5, as well as the parallelism of the end faces of the gear rings.

[0046] To achieve multi-functional output, please refer to one embodiment of this utility model. Figure 2The transmission device 1000 also includes a third bevel gear 13, which is located at the end of the housing 1 away from the motor 2. The third bevel gear 13 meshes with the second bevel gear 10. The axis of the third bevel gear 13 is perpendicular to the axis of the second bevel gear 10, but parallel to the axis of the first bevel gear 9. The third bevel gear 13 and the second bevel gear 10 mesh perpendicularly to each other, forming a second pair of bevel gears with a 90° transmission. At this time, the first bevel gear 9 is the power input point, and the second bevel gear 10 and the third bevel gear 13 are two power output points. In this design, only one output point can be used by connecting to the second bevel gear 10 through the output component 3, or both output points can be used simultaneously by connecting to the third bevel gear 13 through an additional output structure. In this design, the power is reduced by the NGWN planetary mechanism and then output to the first bevel gear 9 by the second internal gear ring 5. The first bevel gear 9 drives the second bevel gear 10 to rotate, completing the first power steering (e.g., from horizontal to vertical downward). Subsequently, the third bevel gear 13, meshing with the second bevel gear 10, is driven, completing the second power steering (e.g., from vertically downward to horizontal). Finally, the transmission device 1000 retains the output interface of the second bevel gear 10 at one end of the housing 1, while adding an output interface of the third bevel gear 13 at the other end of the housing 1 away from the motor 2, allowing simultaneous or selective driving of two attachments. That is, one motor 2, through a two-stage bevel gear transmission, generates two output ends in different directions, originating from the same source and synchronized. This allows a food processing device to simultaneously drive two different processing attachments. For example, one output end connects to a mixing paddle (for mixing ingredients in a bowl), and the other output end connects to a meat grinder (for feeding through an external pipe), greatly expanding the functionality and efficiency of the equipment.

[0047] This utility model also proposes a food processing device, which includes the aforementioned transmission device 1000. The specific structure of the transmission device 1000 is as described in the above embodiments. Since this food processing device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A transmission device, characterized in that, Includes housing, motor, reduction gear, and output components; The motor is located on one side of the housing; The reduction mechanism includes a first internal gear ring, a second internal gear ring, a sun gear, and planet gears disposed within the housing. The first internal gear ring is fixedly connected to the housing, the second internal gear ring is rotatably disposed within the housing, the sun gear is connected to the output shaft of the motor, the planet gears mesh with the sun gear, and the planet gears mesh with both the first internal gear ring and the second internal gear ring simultaneously. The number of teeth on the first internal gear ring and the second internal gear ring are different. The output component is connected to the second internal gear ring via a transmission.

2. The transmission device as described in claim 1, characterized in that, The transmission device further includes a first bevel gear and a second bevel gear disposed within the housing. The first bevel gear is connected to the second internal gear ring, the second bevel gear meshes with the first bevel gear, and the output component is connected to the second bevel gear.

3. The transmission device as described in claim 2, characterized in that, The second internal gear ring and the first bevel gear are integrally formed.

4. The transmission device as described in claim 1, characterized in that, The deceleration mechanism also includes a planetary carrier and multiple fixed shafts, wherein the multiple fixed shafts are disposed on the planetary carrier; The deceleration mechanism includes a plurality of planetary gears, each of which is fitted onto a fixed shaft.

5. The transmission device as described in claim 4, characterized in that, An annular groove is formed at the end of the fixed shaft away from the planet carrier; The deceleration mechanism also includes multiple retaining rings, each of which is sleeved in one of the annular grooves.

6. The transmission device as described in claim 1, characterized in that, The outer peripheral wall of the first internal gear ring is provided with at least two limiting protrusions; The inner wall of the housing is formed with at least two limiting grooves, and each limiting protrusion is engaged with one of the limiting grooves.

7. The transmission device as described in claim 1, characterized in that, The first internal gear ring has a positioning groove; The second internal gear ring has a positioning protrusion, which is inserted into the positioning groove.

8. The transmission device as described in claim 1, characterized in that, The motor is connected to the housing by screws.

9. The transmission device as described in claim 1, characterized in that, The transmission device further includes a third bevel gear, which is located at the end of the housing away from the motor, and meshes with the second bevel gear.

10. A food processing device, characterized in that, Includes the transmission device as described in any one of claims 1 to 9.

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