Air inlet noise reduction structure of gearbox of food processor

Abstract

The air inlet noise reduction structure of the food processor gearbox comprises a box body, a motor, heat dissipation fan blades and a speed reduction transmission assembly, a containing space is formed in the box body, an air inlet and an air outlet are formed in the two ends of the box body respectively, and the air inlet and the air outlet are both communicated with the containing 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 the heat dissipation fan blades are connected to one end of the motor shaft and are close to the air inlet. The blocking piece is provided with a through opening communicating with the air inlet, and the area of the through opening is smaller than that of the air inlet. According to the gearbox of the food processor, the air inlet area of the air inlet is reduced through the blocking piece, the air inlet amount is reduced, noise at the air inlet is small, in addition, the inner side of the blocking piece plays a certain role in blocking, reflecting and counteracting noise generated by the motor and the speed reduction transmission assembly, and noise in the containing space can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing machines, in particular to an air inlet 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 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, especially when the air inlet area is large and a large amount of external air passes through the air inlet, which will cause a lot of noise at the air inlet. Utility Model Content

[0005] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and to provide an air inlet silencer structure for a food processing machine gearbox, which adds a blocking member to the air inlet to reduce the air inlet area and make the noise at the air inlet smaller.

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

[0007] A food processing machine gearbox air inlet silencer structure, comprising a box, a motor, a heat dissipation fan blade and a reduction transmission assembly, wherein a placement space is provided in the box, an air inlet and an air outlet are provided at both ends of the box, and the air inlet and the air outlet are both communicated with the placement space, the motor and the reduction transmission assembly are both placed in the placement space, and the motor shaft of the motor is in transmission connection with the reduction transmission assembly, the heat dissipation fan blade is connected to one end of the motor shaft and the heat dissipation fan blade is close to the air inlet, and the characteristic is that a blocking member is provided on the air inlet, and a A through-hole connected to the air inlet and the area of the through-hole is smaller than the area of the air inlet; the air inlet silencer structure of this food processor gearbox adds a blocking member with a through-hole on the air inlet, and the external air must pass through the through-hole before passing through the air inlet, that is: the blocking member reduces the air inlet area of the air inlet and reduces the air intake volume, so that the noise at the air inlet is smaller. In addition, the inner side of the blocking member has a certain blocking and reflection offsetting effect on the noise generated by the motor and the reduction transmission component in the installation space, which is beneficial to reducing the noise in the installation space.

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

[0009] Specifically, the area of the through-hole on the blocking member is 15%-60% of the air inlet area; within this data range, the blocking member can not only effectively reduce the air inlet area and reduce noise, but also meet the air intake demand in the installation space.

[0010] Specifically, the blocking member is a blocking plate, which includes an upper plate and a lower plate, both of which are connected to the air inlet, an upper through-recess is provided on the upper plate, and a lower through-recess is provided on the lower plate, and the upper through-recess and the lower through-recess form the through-opening; so that the through-opening is relatively simple and easy to set up, and at the same time, the blocking plate formed by the upper plate and the lower plate has a simple structure and is easy to set up.

[0011] Specifically, the box body includes a lower shell and an upper shell connected to each other, the lower shell and the upper shell form the placement space, one end of the lower shell and one end of the upper shell form the air inlet, the upper plate is connected to one end of the upper shell, and the lower plate is connected to one end of the lower shell; its implementation effect is good.

[0012] Specifically, the upper surface of the lower plate and the upper surface of one end of the lower shell are provided with L-shaped ridges extending upward, and the lower surface of the upper plate and the lower surface of one end of the upper shell are provided with L-shaped grooves corresponding to the positions of the L-shaped ridges, and the L-shaped ridges extend into the L-shaped grooves; through the cooperation of the L-shaped ridges and the L-shaped grooves, the installation between the upper plate and the lower plate and the installation between one end of the upper shell and one end of the lower shell are better positioned, which is beneficial to the stable formation of the through-port and the air inlet.

[0013] Specifically, a connecting column with a connecting screw hole is provided on the outer side of the upper shell near the upper plate, and a connecting through hole is opened on the outer side of the lower shell corresponding to the position of the connecting screw hole. A connecting screw passes through the connecting through hole and is connected to the connecting screw hole; so as to achieve a stable connection between one end of the upper shell and one end of the lower shell, and between the upper plate and the lower plate.

[0014] Specifically, the upper plate and one end of the upper shell are integrally formed, and the lower plate and the lower shell are integrally formed; it is relatively easy to manufacture.

[0015] Specifically, the heat dissipation fan blades are located inside the blocking member to reduce the impact of the external environment on the heat dissipation fan blades, which is conducive to the stable operation of the heat dissipation fan blades.

[0016] Specifically, it further includes a mounting bracket, a limited space is set on the mounting bracket, the motor is installed in the limited space and the motor shaft of the motor extends out of the limited space and is transmission-connected to the reduction transmission assembly, a guide column is set at one end of the mounting bracket, and an upper recess and a lower recess are set corresponding to the position of the guide column in the placement space, the upper end of the guide column extends into the upper recess, and the lower end of the guide column extends into the lower recess; the limited space of the mounting bracket has a better installation and vibration-limiting effect on the motor, and at the same time, the cooperation of the guide column with the upper recess and the lower recess enables the mounting bracket to be stably installed in the placement space, so that the motor can be stably installed in the box, which is beneficial to the stable operation of the motor itself and also makes less noise when the motor is working.

[0017] The beneficial effects of the utility model are as follows:

[0018] (1) The air inlet silencer structure of the food processing machine gearbox is designed to add a blocking member with a through hole to the air inlet. The external air must first pass through the through hole before passing through the air inlet. That is, the blocking member reduces the air inlet area and the air intake volume of the air inlet, making the noise at the air inlet smaller. In addition, the inner side of the blocking member plays a certain role in blocking and reflecting the noise generated by the motor and the reduction transmission component in the installation space, which is conducive to reducing the noise in the installation space.

[0019] (2) Through the cooperation of the L-shaped ribs and the L-shaped grooves, a better positioning effect is played on the installation between the upper plate and the lower plate, and the installation between one end of the upper shell and one end of the lower shell, which is conducive to the stable formation of the through-hole and the air inlet.

[0020] (3) The limited space of the mounting bracket plays a better role in fixing and limiting vibration of the motor. At the same time, the cooperation between the guide column and the upper and lower recesses enables the mounting bracket to be stably installed in the installation space, thereby enabling the motor to be stably installed in the box, which is conducive to the stable operation of the motor itself and also reduces the noise when the motor is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the air inlet silencer structure of the food processing machine gearbox according to the present invention.

[0022] Figure 2 for Figure 1 Schematic diagram from another angle.

[0023] Figure 3 This is a disassembled diagram of the air inlet silencer structure of the food processing machine gearbox according to the present invention.

[0024] Figure 4 It is a three-dimensional diagram of the mounting bracket of the present utility model.

[0025] Figure 5 This is a cross-sectional view of the air inlet silencer structure of the food processing machine gearbox according to the present invention.

[0026] Figure 6 This is another cross-sectional view of the air inlet silencer structure of the food processing machine gearbox according to the present invention.

[0027] Figure 7 It is a three-dimensional diagram of the lower shell of the utility model. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] Example, combined with Figures 1 to 7 As shown, an air inlet silencer structure of a food processing machine gearbox includes a box body 1, a motor 2, a heat dissipation fan blade 3 and a reduction transmission assembly 4. A placement 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 placement space 11. The motor 2 and the reduction transmission assembly 4 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 4. The heat dissipation fan blade 3 is connected to one end of the motor shaft 21 and the heat dissipation fan blade 3 is close to the air inlet 12. It is characterized in that a blocking member 5 is provided on the air inlet 12, and a through-hole 51 connected to the air inlet 12 is provided on the blocking member 5, and the area of the through-hole 51 is smaller than the area of the air inlet 12.

[0030] As a specific solution, the area of the through opening 51 on the blocking member 5 is 15%-60% of the area of the air inlet 12, preferably 30%.

[0031] As a more specific solution, the blocking member 5 is a blocking plate, which includes an upper plate 52 and a lower plate 53. The upper plate 52 and the lower plate 53 are both connected to the air inlet 12. The upper plate 52 is provided with an upper through-recess 521, and the lower plate 53 is provided with a lower through-recess 531. The upper through-recess 52 and the lower through-recess 531 surround the through-opening 51.

[0032] In this embodiment, the box body 1 includes a lower shell 14 and an upper shell 15 that are connected to each other, and the lower shell 14 and the upper shell 15 form the placement space 11, one end of the lower shell 14 and one end of the upper shell 15 form the air inlet 12, the upper plate 52 is connected to one end of the upper shell 15, and the lower plate 53 is connected to one end of the lower shell 14; the air outlet 13 is opened on the lower shell 14.

[0033] In this embodiment, an L-shaped ridge 16 extends upward from the upper surface of the lower plate 53 and the upper surface of one end of the lower shell 14, and an L-shaped groove 17 is provided on the lower surface of the upper plate 52 and the lower surface of one end of the upper shell 15 at a position corresponding to the L-shaped ridge 16, and the L-shaped ridge 16 extends into the L-shaped groove 17.

[0034] In this embodiment, a connecting column 18 with a connecting screw hole 181 is provided on the outer side of the upper shell 15 close to the upper plate 52, and a connecting through hole 19 is opened on the outer side of the lower shell 14 at a position corresponding to the connecting screw hole 181. A connecting screw passes through the connecting through hole 19 and is connected to the connecting screw hole 181 (the connecting screw is not shown).

[0035] In this embodiment, the upper plate 52 is integrally formed with one end of the upper shell 15 , and the lower plate 53 is integrally formed with the lower shell 14 .

[0036] As a more preferred embodiment, the heat dissipation fan blades 3 are located inside the blocking member 5 .

[0037] As a more preferred embodiment, it also includes a mounting bracket 6, a limited space 61 is set on the mounting bracket 6, the motor 2 is installed on the limited space 61 and the motor shaft 21 of the motor 2 extends out of the limited space 61 and is transmission-connected to the reduction transmission assembly 4, a guide column 62 is set at one end of the mounting bracket 6, and an upper recess 111 and a lower recess 112 are set in the placement space 11 corresponding to the position of the guide column 62, the upper end of the guide column 62 extends into the upper recess 111, and the lower end of the guide column 62 extends into the lower recess 112.

Claims

1. An air inlet silencer structure for a food processing machine gearbox, comprising a housing (1), a motor (2), a heat dissipation fan blade (3) and a reduction transmission assembly (4), 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), the motor (2) and the reduction transmission assembly (4) are both placed in the placement space (11), and the motor shaft (21) of the motor (2) is in transmission connection with the reduction transmission assembly (4), the heat dissipation fan blade (3) is connected to one end of the motor shaft (21), and the heat dissipation fan blade (3) is close to the air inlet (12), and the invention is characterized in that: A blocking member (5) is provided on the air inlet (12), and a through-hole (51) communicating with the air inlet (12) is provided on the blocking member (5), and the area of the through-hole (51) is smaller than the area of the air inlet (12).

2. The air inlet silencer structure of the food processing machine gearbox according to claim 1 is characterized in that: The area of the through opening (51) on the blocking member (5) is 15%-60% of the area of the air inlet (12).

3. The air inlet silencer structure of the food processing machine gearbox according to claim 1 is characterized in that: The blocking member (5) is a blocking plate, comprising an upper plate (52) and a lower plate (53), both of which are connected to the air inlet (12), an upper through-recess (521) being provided on the upper plate (52), and a lower through-recess (531) being provided on the lower plate (53), the upper through-recess (521) and the lower through-recess (531) enclosing the through-opening (51).

4. The air inlet silencer structure of the food processing machine gearbox according to claim 3 is characterized in that: The box body (1) includes a lower shell (14) and an upper shell (15) connected to each other, the lower shell (14) and the upper shell (15) enclose the placement space (11), one end of the lower shell (14) and one end of the upper shell (15) enclose the air inlet (12), the upper plate (52) is connected to one end of the upper shell (15), and the lower plate (53) is connected to one end of the lower shell (14).

5. The air inlet silencer structure of the food processing machine gearbox according to claim 4 is characterized in that: An L-shaped convex strip (16) extends upward from the upper surface of the lower plate (53) and the upper surface of one end of the lower shell (14), and an L-shaped groove (17) is provided on the lower surface of the upper plate (52) and the lower surface of one end of the upper shell (15) at a position corresponding to the L-shaped convex strip (16), and the L-shaped convex strip (16) extends into the L-shaped groove (17).

6. The air inlet silencer structure of the food processing machine gearbox according to claim 4, characterized in that: A connecting column (18) with a connecting screw hole (181) is provided on the outer side of the upper shell (15) near the upper plate (52), and a connecting through hole (19) is opened on the outer side of the lower shell (14) at a position corresponding to the connecting screw hole (181), and a connecting screw passes through the connecting through hole (19) and is connected to the connecting screw hole (181).

7. The air inlet silencer structure of the food processing machine gearbox according to claim 4 is characterized in that: The upper plate (52) and one end of the upper shell (15) are integrally formed, and the lower plate (53) and the lower shell (14) are integrally formed.

8. The air inlet silencer structure of the food processing machine gearbox according to claim 1 is characterized in that: The heat dissipation fan blades (3) are located inside the blocking member (5).

9. The air inlet silencer structure of the food processing machine gearbox according to claim 1, characterized in that: The invention also includes a mounting bracket (6), a limited space (61) is provided on the mounting bracket (6), a motor (2) is mounted on the limited space (61), and a motor shaft (21) of the motor (2) extends out of the limited space (61) and is transmission-connected to the reduction transmission assembly (4), a guide column (62) is provided at one end of the mounting bracket (6), an upper recess (111) and a lower recess (112) are provided in the placement space (11) at a position corresponding to the guide column (62), the upper end of the guide column (62) extends into the upper recess (111), and the lower end of the guide column (62) extends into the lower recess (112).

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