Silencing structure of gearbox of food processor

Abstract

The utility model discloses a noise reduction structure of a gearbox of a food processor, which comprises a box body, a motor and a speed reduction transmission assembly, a placement space is arranged in the box body, an air inlet and an air outlet are respectively arranged at two ends of the box body, and the air inlet and the air outlet are both communicated with the placement space. The motor and the speed reduction transmission assembly are both arranged in the containing space, a motor shaft of the motor is in transmission connection with the speed reduction transmission assembly, and a silencing cavity extending outwards is formed in the inner wall of the containing space. According to the noise reduction structure of the gearbox of the food processor, the noise reduction cavity is additionally arranged, when noise generated by the motor and the speed reduction transmission assembly in the containing space enters the noise reduction cavity, the noise is reflected in the noise reduction cavity and then resonates and counteracts noise on the containing space, and the good noise reduction effect is achieved; in other words, the silencing cavity has a good resonance effect, so that the overall noise is low when the gearbox works.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing machines, in particular to a silencer structure of a food processing machine gearbox. Background Art

[0002] For the existing speed change device, see Chinese invention patent number: 2023110652566, title: A gearbox structure and a juicer including the gearbox structure, authorization announcement date: December 1, 2023, the gearbox structure includes a motor, a gearbox and an output shaft, the gearbox includes a housing, a speed change gear assembly and an upper shell, the output end of the speed change gear assembly includes an output rack, one end of the output shaft passes through the output rack, and the other end passes through the shaft hole of the upper shell and extends out of the upper shell, the output rack drives the output shaft to rotate, which is characterized in that a spring and a spring top pressure part are sleeved on the output shaft, the spring and the spring top pressure part are located between the output rack and the inner side wall of the upper shell, and the spring is One end of the gearbox abuts against the output frame or the upper shell, and the other end abuts against the spring pressing portion, which is fixedly connected to the output shaft. Under the action of the spring, the output shaft can move up and down along the output frame when it is compressed and reset. This gearbox structure allows the output shaft to move up and down along the output frame by arranging the spring and the spring pressing portion on the output shaft. The gearbox body only protects the speed change gear assembly, but cannot protect the motor. At the same time, the motor and gearbox need to be installed and fixed separately inside the main body of the juicer through different structures, which makes the overall connection structure complicated and the installation operation is also relatively cumbersome and time-consuming.

[0003] In order to solve the above problems, the existing speed change device is equipped with an outer box body to wrap the motor and the reduction transmission assembly in the outer box body, so that the three constitute an integral module speed change device. The outer box body not only protects the motor and the reduction transmission assembly, but also facilitates the installation of the integral module speed change device on the juicer; at the same time, an air inlet, an air outlet and a heat dissipation fan blade are also provided on the outer box body. When the above-mentioned heat dissipation fan blades are working, the external air is sucked into the outer box body from the air inlet, thereby dissipating the heat of the motor and the reduction transmission assembly in the outer box body, and finally discharged from the air outlet.

[0004] However, the speed change device of the above structure still has the following deficiencies: (1) the above motor and reduction transmission assembly generate noise when they are working, and the external air also generates noise when passing through the interior of the outer box. The outer box has a limited effect in blocking noise, which makes the speed change device noisy when it is working. Utility Model Content

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide a food processing machine gearbox silencer structure with an additional silencer cavity, which can achieve a better resonance effect to offset part of the noise, thereby reducing the overall noise of the product during operation.

[0006] The purpose of this utility model is achieved in this way:

[0007] A silencer structure for a food processing machine gearbox comprises a housing, a motor and a reduction transmission assembly, wherein an accommodation space is provided within the housing, an air inlet and an air outlet are respectively provided at both ends of the housing, and both the air inlet and the air outlet are communicated with the accommodation space, and the characteristic is that the motor and the reduction transmission assembly are both placed within the accommodation space, and the motor shaft of the motor is transmission-connected to the reduction transmission assembly, and an outwardly extending silencer cavity is provided on the inner wall of the accommodation space; the silencer structure for the food processing machine gearbox, by adding a silencer cavity, when the noise generated by the motor and the reduction transmission assembly in the accommodation space enters the silencer cavity, the noise is reflected in the silencer cavity and resonates with the noise in the accommodation space to offset it, thereby achieving a better silencer effect; that is, the silencer cavity has a better resonance effect, so that the overall noise of the gearbox is smaller when it is working.

[0008] The purpose of the utility model can also be solved by the following technical measures:

[0009] Specifically, the central axis of the silencing cavity is perpendicular to the central axis of the placement space; the silencing cavity arranged perpendicular to the placement space is conducive to the reflection of noise in the silencing cavity and the reflection effect is good; furthermore, the vertical silencing cavity is relatively simple to set up.

[0010] Specifically, it further includes a silencer chamber baffle, which has a through hole. The silencer chamber baffle is connected to the lower opening of the silencer chamber and the inner diameter of the through hole is smaller than the inner diameter of the lower opening of the silencer chamber. The silencer chamber baffle can adjust the size of the inner diameter of the lower opening of the silencer chamber to achieve different silencer effects. Furthermore, the silencer chamber baffle itself can also reflect noise, thereby improving the noise cancellation effect of the installation space.

[0011] Specifically, an outer side wall of the box body is extended outward with an integrally formed silencer protrusion, and the silencer cavity is opened in the silencer protrusion; it is relatively easy to manufacture.

[0012] Specifically, through-holes are opened on the side walls of the box body on both sides of the silencer protrusion, and snap blocks are provided on the two side walls of the silencer protrusion at positions corresponding to the through-holes. Snap arms with snap holes are provided on both sides of the silencer chamber baffle at positions corresponding to the through-holes, and one end of the snap arm passes through the through-hole upward and the snap block is snapped into the snap hole; so as to realize the installation and fixation of the silencer chamber baffle on the through-hole, and the installation operation is also relatively simple and convenient.

[0013] Specifically, it also includes a heat dissipation fan blade and an air inlet cover plate, the heat dissipation fan blade is connected to one end of the motor shaft and the heat dissipation fan blade is located at the air inlet of the box, the air inlet cover plate is connected to the air inlet of the box and there is an air inlet gap between the air inlet cover plate and the air inlet; so that the external air enters the installation space through the air inlet gap under the action of the heat dissipation fan blade to dissipate heat for the motor and the reduction transmission component, and at the same time, the air inlet cover plate can play a certain reflection and offsetting role on the noise at the air inlet, which is beneficial to reduce the noise at the air inlet.

[0014] Specifically, a limiting shaft hole is opened on the air inlet cover plate corresponding to the position of the motor shaft, and one end of the motor shaft passes through the heat dissipation fan blade and extends into the limiting shaft hole of the air inlet cover plate; the limiting shaft hole can effectively limit the swing of the motor shaft, which is beneficial to the stable transmission of the motor shaft to the reduction transmission assembly and the heat dissipation fan blade.

[0015] Specifically, a T-shaped limiting frame is provided at the air inlet, and one end of the motor shaft passing through the heat dissipation fan blade passes through the upper center of the T-shaped limiting frame and extends into the limiting shaft hole. Connecting screw holes are provided on both sides of the upper center of the T-shaped limiting frame, and connecting through holes are opened on the air inlet cover plate corresponding to the connecting screw holes. A connecting screw passes through the connecting through hole and is connected to the connecting screw hole; so that the air inlet cover plate is connected to the air inlet through the T-shaped limiting frame, and at the same time, the T-shaped limiting frame also serves to separate the air inlet cover plate and the heat dissipation fan blade, which is conducive to the independent and stable operation of the air inlet cover plate and the heat dissipation fan blade.

[0016] Specifically, it further includes an air outlet cover plate, which is provided with an exhaust port and a blocking portion, and the exhaust port is located on one side of the blocking portion. The upper portion of the air outlet cover plate is connected to the air outlet of the box body, and the blocking portion is located below the air outlet; so that the wind discharged from the air outlet is first slowed down by the blocking portion and then discharged from the exhaust port. At the same time, the blocking portion of the air outlet cover plate can have a certain reflection and offset effect on the noise at the air outlet, which is beneficial to reducing the noise at the air outlet.

[0017] Specifically, the blocking portion is an arc-shaped blocking plate, which includes a downward concave arc segment and an upward convex arc segment. There is a smooth transition between the downward concave arc segment and the upward convex arc segment, and the downward concave arc segment is located below the air outlet; the blocking portion formed by the downward concave arc segment and the upward convex arc segment can better reflect and offset noise, thereby ensuring the sound-absorbing effect of the air outlet cover.

[0018] The beneficial effects of the utility model are as follows:

[0019] (1) The silencer structure of the gearbox of this food processing machine is designed to have a silencer cavity. When the noise generated by the motor and the reduction transmission components in the installation space enters the silencer cavity, the noise is reflected in the silencer cavity and then resonates with the noise in the installation space to achieve a better silencer effect. That is, the silencer cavity has a better resonance effect, which makes the overall noise of the gearbox smaller when it is working.

[0020] (2) The muffler baffle can adjust the inner diameter of the lower opening of the muffler chamber to achieve different muffler effects. In addition, the muffler baffle itself can also reflect noise and improve the noise cancellation effect of the installation space.

[0021] (3) The air inlet cover is connected to the air inlet through a T-shaped limiting frame. At the same time, the T-shaped limiting frame also serves to separate the air inlet cover and the cooling fan blades, which is conducive to the independent and stable operation of the air inlet cover and the cooling fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the silencer structure of the food processing machine gearbox according to the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram from another angle.

[0024] Figure 3 This is a cross-sectional view of the silencer structure of the food processing machine gearbox according to the present invention.

[0025] Figure 4 for Figure 3 Enlarged view of point A.

[0026] Figure 5 for Figure 3 Enlarged view of point B.

[0027] Figure 6 This is a disassembled diagram of the silencer structure of the food processing machine gearbox of the present invention.

[0028] Figure 7 This is a schematic diagram of a second embodiment of a food processing machine gearbox according to the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Example, combined with Figures 1 to 6As shown, a silencer structure of a food processing machine gearbox includes a box body 1, a motor 2 and a reduction transmission assembly 3. An accommodation space 11 is provided in the box body 1, and an air inlet 12 and an air outlet 13 are respectively provided at both ends of the box body 1, and the air inlet 12 and the air outlet 13 are both connected to the accommodation space 11. It is characterized in that the motor 2 and the reduction transmission assembly 3 are both placed in the accommodation space 11 and the motor shaft 21 of the motor 2 is transmission-connected to the reduction transmission assembly 3, and the inner wall of the accommodation space 11 is provided with a silencer cavity 10 extending outward.

[0031] As a specific solution, the central axis of the silencing chamber 10 is perpendicular to the central axis of the accommodation space 11 .

[0032] As a more preferred embodiment, it also includes a silencer chamber baffle 4, which has a through hole 41. The silencer chamber baffle 4 is connected to the lower opening of the silencer chamber 10, and the inner diameter of the through hole 41 is smaller than the inner diameter of the lower opening of the silencer chamber 10.

[0033] In this embodiment, an integrally formed sound-absorbing convex portion 5 is extended outward from the outer side wall of the box body 1 , and the sound-absorbing convex portion 5 defines the sound-absorbing cavity 10 ; the sound-absorbing convex portion 5 is a convex portion with an elliptical cross-section.

[0034] In this embodiment, a through-hole 14 is opened on the side wall of the box body 1 on both sides of the silencer protrusion 5, and a snap block 51 is provided on the two side walls of the silencer protrusion 5 at a position corresponding to the through-hole 14. A snap arm 43 with a snap hole 42 is provided at a position corresponding to the through-hole 14 on both sides of the silencer cavity baffle 4, and one end of the snap arm 43 passes through the through-hole 14 upward and the snap block 51 is snapped into the snap hole 42.

[0035] As a more specific solution, it also includes a heat dissipation fan blade 6 and an air inlet cover 7. The heat dissipation fan blade 6 is connected to one end of the motor shaft 21 and the heat dissipation fan blade 6 is located at the air inlet 12 of the box body 1. The air inlet cover 7 is connected to the air inlet 12 of the box body 1 and there is an air inlet gap 100 between the air inlet cover 7 and the air inlet 12.

[0036] In this embodiment, a limiting shaft hole 71 is formed on the air inlet cover plate 7 at a position corresponding to the motor shaft 21 , and one end of the motor shaft 21 passes through the heat dissipation fan blade 6 and extends into the limiting shaft hole 71 of the air inlet cover plate 7 .

[0037] In this embodiment, a T-shaped limiting frame 121 is provided at the air inlet 12. One end of the motor shaft 21 passing through the heat dissipation fan blade 6 passes through the upper center of the T-shaped limiting frame 121 and extends into the limiting shaft hole 71. Connecting screw holes 122 are provided on both sides of the upper center of the T-shaped limiting frame 121. A connecting through hole 72 is opened on the air inlet cover 7 at the position corresponding to the connecting screw hole 122. A connecting screw passes through the connecting through hole 72 and is connected to the connecting screw hole 122 (the connecting screw is not shown).

[0038] As a more specific solution, an air outlet cover plate 8 is also included, on which an exhaust port 81 and a blocking portion 82 are provided, and the exhaust port 81 is located on one side of the blocking portion 82, and the upper portion of the air outlet cover plate 8 is connected to the air outlet 13 of the box body 1 and the blocking portion 82 is located below the air outlet 13.

[0039] In this embodiment, the blocking portion 82 is an arc-shaped blocking plate, which includes a downward concave arc segment 821 and an upward convex arc segment 822. There is a smooth transition between the downward concave arc segment 821 and the upward convex arc segment 822, and the downward concave arc segment 821 is located below the air outlet 13.

[0040] Example 2: Figure 7 As shown, this embodiment is similar to embodiment 1, except that a blocking member 9 is provided at the air inlet 12 of the box body 1, and a hollow opening 91 connected to the air inlet 12 is provided on the blocking member 9, and the area of the hollow opening 91 is smaller than the area of the air inlet 12; the blocking member 9 reduces the air inlet area of the air inlet 12, so that the noise at the air inlet 12 is smaller.

[0041] More specifically, the area of the hollow opening 91 on the blocking member 9 is 15%-60% of the area of the air inlet 12, preferably 30%.

[0042] More specifically, the blocking member 9 is a blocking plate, which is integrally formed with the box body 1 located at the periphery of the air inlet 12 .

Claims

1. A food processing machine gearbox silencer structure, comprising a housing (1), a motor (2) and a reduction transmission assembly (3), wherein a placement space (11) is provided in the housing (1), an air inlet (12) and an air outlet (13) are provided at both ends of the housing (1), and the air inlet (12) and the air outlet (13) are both communicated with the placement space (11), and the structure is characterized in that: The motor (2) and the reduction transmission assembly (3) are both placed in the placement space (11), and the motor shaft (21) of the motor (2) is transmission-connected to the reduction transmission assembly (3). The inner wall of the placement space (11) is provided with a silencer cavity (10) extending outward.

2. The food processing machine gearbox silencer structure according to claim 1, characterized in that: The central axis of the muffler cavity (10) is perpendicular to the central axis of the placement space (11).

3. The food processing machine gearbox silencer structure according to claim 1, characterized in that: The invention also includes a muffler chamber baffle (4), the muffler chamber baffle (4) is provided with a through hole (41), the muffler chamber baffle (4) is connected to the lower opening of the muffler chamber (10), and the inner diameter of the through hole (41) is smaller than the inner diameter of the lower opening of the muffler chamber (10).

4. The food processing machine gearbox silencer structure according to claim 3, characterized in that: An integrally formed silencer protrusion (5) extends outward from the outer side wall of the box body (1), and the silencer cavity (10) is formed in the silencer protrusion (5).

5. The food processing machine gearbox silencer structure according to claim 4, characterized in that: Through openings (14) are provided on the side walls of the box body (1) on both sides of the muffler convex portion (5), and snap blocks (51) are provided on the side walls of the muffler convex portion (5) at positions corresponding to the through openings (14). Snap arms (43) with snap holes (42) are provided on both sides of the muffler cavity baffle (4) at positions corresponding to the through openings (14), and one end of the snap arm (43) passes through the through opening (14) upward, and the snap block (51) is snapped into engagement with the snap hole (42).

6. The food processing machine gearbox silencer structure according to claim 1, characterized in that: It also includes a heat dissipation fan blade (6) and an air inlet cover plate (7), wherein the heat dissipation fan blade (6) is connected to one end of the motor shaft (21) and the heat dissipation fan blade (6) is located at the air inlet (12) of the box body (1), and the air inlet cover plate (7) is connected to the air inlet (12) of the box body (1), and an air inlet gap (100) exists between the air inlet cover plate (7) and the air inlet (12).

7. The food processing machine gearbox silencer structure according to claim 6, characterized in that: A limiting shaft hole (71) is provided on the air inlet cover plate (7) at a position corresponding to the motor shaft (21), and one end of the motor shaft (21) passes through the heat dissipation fan blade (6) and extends into the limiting shaft hole (71) of the air inlet cover plate (7).

8. The food processing machine gearbox silencer structure according to claim 7, characterized in that: A T-shaped limiting frame (121) is provided at the air inlet (12), and one end of the motor shaft (21) passing through the heat dissipation fan blade (6) passes through the upper center of the T-shaped limiting frame (121) and extends into the limiting shaft hole (71). Connecting screw holes (122) are provided on both sides of the upper center of the T-shaped limiting frame (121), and a connecting through hole (72) is opened on the air inlet cover (7) at a position corresponding to the connecting screw hole (122), and a connecting screw passes through the connecting through hole (72) and is connected to the connecting screw hole (122).

9. The food processing machine gearbox silencer structure according to claim 1, characterized in that: The air outlet cover (8) is also included. The air outlet cover (8) is provided with an outlet (81) and a blocking portion (82), and the outlet (81) is located on one side of the blocking portion (82). The upper portion of the air outlet cover (8) is connected to the air outlet (13) of the box body (1), and the blocking portion (82) is located below the air outlet (13).

10. The food processing machine gearbox silencer structure according to claim 9, characterized in that: The blocking portion (82) is an arc-shaped blocking plate, comprising a downwardly concave arc section (821) and an upwardly convex arc section (822), with a smooth transition between the downwardly concave arc section (821) and the upwardly convex arc section (822), and the downwardly concave arc section (821) is located below the air outlet (13).

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