Food processor capable of reducing noise of gearbox

Abstract

The utility model discloses a food processor capable of reducing noise of a gear box, which comprises a main machine assembly and a stirring cup assembly arranged on the main machine assembly, the stirring cup assembly comprises a stirring cup and a crushing cutter arranged in the stirring cup, and the main machine assembly comprises a motor and the gear box. The gear box comprises a gear box body composed of a gear box upper cover and a gear box lower cover and a planetary gear train arranged in the gear box body, an output shaft of the motor is connected with the input end of the planetary gear train, and the output end of the planetary gear train drives the smashing cutter to rotate. An axial positioning structure and a radial positioning structure are arranged between the gear box upper cover and the gear box lower cover, and the axial positioning structure does not affect positioning of the radial positioning structure. The gear box solves the problem of noise of the gear box caused by low positioning accuracy of the gear upper cover and the gear lower cover.

Description

Technical Field

[0001] The utility model belongs to the technical field of small kitchen appliances, and in particular relates to a food processing machine. Background Art

[0002] Conventional food processors on the market, taking a common wall-breaking machine as an example, are mostly divided into a main unit and a mixing cup unit; wherein the main unit is provided with a motor and a gearbox, the output shaft of the motor is connected to the input end of the gearbox, and then drives the crushing blade in the mixing cup through the gearbox. In order to reduce the noise of the gearbox, a Chinese utility model patent with reference to the announcement number CN 210715766 U discloses a food processor, including a gearbox, the gearbox including a housing composed of a gear upper cover and a gear lower cover, a gear input shaft, a gear output shaft and a transmission member; the transmission member includes a sun gear, a planetary gear, a planetary carrier, and an inner gear ring, the sun gear is connected to the input shaft, the inner gear ring is integrally formed with the gear upper cover, the planetary gear is arranged on the planetary shaft and meshes with the sun gear and the inner gear ring respectively, and the gear output shaft is fixedly connected to the planetary carrier; the gear upper cover is provided with a bearing mounting cavity, the bearing mounting cavity is provided with a first bearing, and the first bearing is interference fit with the bearing mounting cavity. The bearing of the gear output shaft and the inner gear ring are set to a relatively static structure through interference fit. At the same time, the gear output shaft and the planetary carrier are relatively fixed to ensure the coaxiality of the input shaft and the output shaft. This patent reduces the noise of the gearbox by ensuring the coaxiality of the input shaft and the output shaft. During the operation of the gearbox, due to the low positioning accuracy of the gear upper cover and the gear lower cover, the gear upper cover and the gear lower cover will move relative to each other during the operation of the machine, resulting in a limited reduction in the noise of the gearbox. Of course, in order to improve the positioning accuracy between the gear upper cover and the gear lower cover in the prior art, multiple positioning structures are also used, but interference is easily generated between the multiple positioning structures, resulting in the inability to effectively play the positioning role, affecting the improvement of positioning accuracy. Utility Model Content

[0003] In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide a food processing machine with reduced gear box noise, thereby solving the gear box noise problem caused by the low positioning accuracy of the gear upper cover and the gear lower cover.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a food processor for reducing gear box noise, comprising a main engine assembly and a stirring cup assembly arranged on the main engine assembly, the stirring cup assembly comprising a stirring cup and a crushing knife arranged in the stirring cup, the main engine assembly comprising a motor and a gear box, the gear box comprising a gear box body composed of a gear box upper cover and a gear box lower cover, and a planetary gear train arranged in the gear box body, the output shaft of the motor is connected to the input end of the planetary gear train, the output end of the planetary gear train drives the crushing knife to rotate, an axial positioning structure and a radial positioning structure are arranged between the gear box upper cover and the gear box lower cover, and the axial positioning structure does not affect the positioning of the radial positioning structure.

[0005] Preferably, the radial positioning structure comprises an inner positioning ring provided on the lower cover of the gear box and an outer positioning ring provided on the upper cover of the gear box, and the inner positioning ring cooperates with the outer positioning ring in radial positioning.

[0006] Preferably, the inner positioning ring protrudes from the upper end surface of the gear box lower cover, and the outer positioning ring is arranged on the inner ring of the lower port of the gear box upper cover.

[0007] Preferably, a positioning ring groove is provided on the inner ring of the lower port of the gear box upper cover, the outer positioning ring is provided on the side wall of the positioning ring groove, and the top end of the inner positioning ring is lower than the top end of the positioning ring groove.

[0008] Preferably, the axial positioning structure includes a fastener connecting the gear box upper cover and the gear box lower cover, and a radial movable gap is provided between the fastener and the gear box upper cover or the gear box lower cover.

[0009] Preferably, the fastener is a positioning screw, a through hole is provided on the gear box upper cover, a threaded hole is provided on the gear box lower cover, the positioning screw passes through the through hole and is threadedly connected to the threaded hole, and the positioning screw is clearance-matched with the through hole.

[0010] Preferably, the planetary gear train includes a sun gear, a planet carrier and a planetary gear, the planetary gear is mounted on the planet carrier through a planetary pin, the sun gear is meshed with the planetary gear, the output shaft of the motor is connected to the sun gear, and the planetary carrier drives the crushing knife to rotate.

[0011] Preferably, the radial single-side clearance D4 between the planet pin and the inner hole of the planet gear is ≤0.02 mm; and / or the meshing side clearance between the sun gear and the planet gear is D7, 0.2≤D7≤0.3 mm.

[0012] Preferably, the output shaft of the motor is provided with a knurled section and a guide light shaft section, and the radial single-sided interference fit between the inner hole of the sun gear and the knurled section is D5, 0.09≤D5≤0.16mm; and / or the radial single-sided clearance between the inner hole of the sun gear and the guide light shaft section is D6, 0.01≤D6≤0.07mm.

[0013] Preferably, an upper coupler connected to the crushing knife is provided at the bottom of the mixing cup, and a lower coupler is connected to the output shaft of the planetary frame, and the upper coupler is connected to the lower coupler.

[0014] The technical solution adopted by the utility model has the following beneficial effects:

[0015] 1. The gear box body is composed of a gear box upper cover and a gear box lower cover. Since an axial positioning structure and a radial positioning structure are provided between the gear box upper cover and the gear box lower cover, the axial positioning structure prevents the gear box upper cover and the gear box lower cover from moving in the axial direction, and the radial positioning structure prevents the gear box upper cover and the gear box lower cover from moving in the radial direction, so that the degrees of freedom in all directions are restricted, and the positioning accuracy between the two is high. During the operation of the machine, the gear box upper cover and the gear box lower cover basically do not move relative to each other, which greatly reduces the gear box noise and solves the gear box noise problem caused by the low positioning accuracy of the gear box upper cover and the gear box lower cover.

[0016] In addition, because the axial positioning structure only plays a role in upper and lower axial limiting, and the radial positioning structure only plays a role in horizontal radial limiting, not only are the limiting directions different, but the radial limiting structure has a higher priority, that is, the radial positioning structure is first ensured to play a radial limiting role, and then the axial positioning structure is ensured to play an axial limiting role. The axial positioning structure does not affect the positioning of the radial positioning structure, thereby ensuring that both the axial positioning structure and the radial positioning structure can play a role.

[0017] 2. The inner locating ring and the outer locating ring are radially positioned together, so that all radial directions between the gear box upper cover and the gear box lower cover are effectively positioned along the entire circumference, with high radial positioning accuracy, which is beneficial to reducing the noise between the gear upper cover and the gear lower cover.

[0018] 3. The inner locating ring protrudes from the upper end surface of the gear box lower cover, the inner ring of the lower port of the gear box upper cover is provided with a locating ring groove, the outer locating ring is arranged on the side wall of the locating ring groove, and the height of the inner locating ring is lower than the height of the locating ring groove. In this way, when the gear box upper cover and the gear box lower cover are combined, the inner locating ring and the outer locating ring are aligned, and the radial positioning cooperation of the inner locating ring and the outer locating ring will not affect the axial positioning, and ensure that the radial positioning structure plays a role.

[0019] 4. Since there is a radial clearance between the fasteners connecting the gearbox upper cover and the gearbox lower cover and the gearbox upper cover or between the gearbox upper cover and the gearbox upper cover, the radial positioning structure can be used to position the gearbox first through the radial clearance, and then the fasteners can be fixed, which not only realizes axial positioning but also has the effect of strengthening radial positioning.

[0020] 5. The positioning screw passes through the through hole and is threadedly connected to the threaded hole. The positioning screw and the through hole are matched with each other. Compared with other fastening structures, it has the advantage of convenient fixation. Moreover, after the positioning screw and the threaded hole are tightened, it can realize axial positioning and strengthen radial positioning at the same time.

[0021] 6. The main features of planetary gear transmission are small size, large load-bearing capacity, stable operation and low noise. And because the parameters of the planetary gear system are finely designed, the matching accuracy between the main transmission components is improved, so that the gear box noise is lower.

[0022] The specific technical solution adopted by the utility model and the beneficial effects brought about by it will be disclosed in detail in the following specific implementation manner in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0024] Figure 1 It is a schematic diagram of the overall structure of the food processor after the mixing cup assembly is placed on the main assembly;

[0025] Figure 2 It is a schematic diagram of the overall structure of the food processor when the blender cup assembly is separated from the main machine assembly;

[0026] Figure 3 is a cross-sectional view of a host assembly;

[0027] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 5 A front view of the food processor after the blending cup assembly is placed on the main assembly;

[0029] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0030] Figure 7 The three-dimensional structure diagram of the host component;

[0031] Figure 8 It is a breakdown structure diagram of the host components;

[0032] Fig. 9 is a cross-sectional view of a host assembly;

[0033] Fig.10 for Fig. 9 The enlarged structural diagram at C in the middle;

[0034] Fig.11 is a cross-sectional view of the gearbox;

[0035] Fig.12 for Fig.11 The enlarged structural diagram at D in the middle;

[0036] Fig.13 is a cross-sectional view of the motor;

[0037] Fig.14 for Fig.13 The enlarged structural diagram at E in the middle;

[0038] Fig.15 is a cross-sectional view of the motor;

[0039] Fig.16 for Fig.15 The enlarged structural diagram at F in the middle;

[0040] In the figure: main engine assembly 1, motor 11, output shaft 111, knurled section 1111, guide light shaft section 1112, gear box 12, gear box lower cover 121, inner positioning ring 1211, threaded hole 1212, flange 1213, gear box upper cover 122, outer positioning ring 1221, through hole 1222, positioning screw 123, sun gear 124, planet carrier 125, planet pin 126, planet gear 127, planet carrier output shaft 128, lower coupler 13. DETAILED DESCRIPTION

[0041] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0042] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0043] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words such as "upper", "lower", "inner", "outer", etc. indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figures 1 to 16 As shown, this embodiment provides a food processor, which is specifically described by taking a wall-breaking machine as an example, and includes a main unit component 1 and a mixing cup component 2, wherein the mixing cup component 2 includes a mixing cup and a crushing knife arranged in the mixing cup. The main unit component 1 includes a motor 11 and a gear box 12, wherein an output shaft 111 of the motor 11 is connected to an input end of the gear box, and an output end of the gear box 12 drives the crushing knife to rotate.

[0046] The gearbox 12 includes a gearbox body composed of a gearbox upper cover 122 and a gearbox lower cover 121, and a planetary gear train arranged in the gearbox body. An axial positioning structure and a radial positioning structure are arranged between the gearbox upper cover 122 and the gearbox lower cover 121, and the axial positioning structure does not affect the positioning of the radial positioning structure.

[0047] In the above technical scheme, the gear box body is composed of a gear box upper cover and a gear box lower cover. Since an axial positioning structure and a radial positioning structure are provided between the gear box upper cover and the gear box lower cover, the axial positioning structure prevents the gear box upper cover and the gear box lower cover from moving in the axial direction, and the radial positioning structure prevents the gear box upper cover and the gear box lower cover from moving in the radial direction, in this way, the degrees of freedom in all directions are restricted, so the positioning accuracy between the two is high. During the operation of the machine, the gear box upper cover and the gear box lower cover basically do not move relative to each other, which greatly reduces the gear box noise and solves the gear box noise problem caused by the low positioning accuracy of the gear box upper cover and the gear box lower cover.

[0048] In addition, because the axial positioning structure only plays a role in upper and lower axial limiting, and the radial positioning structure only plays a role in horizontal radial limiting, not only are the limiting directions different, but the radial limiting structure has a higher priority, that is, the radial positioning structure is first ensured to play a radial limiting role, and then the axial positioning structure is ensured to play an axial limiting role. The axial positioning structure does not affect the positioning of the radial positioning structure, thereby ensuring that both the axial positioning structure and the radial positioning structure can play a role.

[0049] In this embodiment, the radial positioning structure includes an inner positioning ring 1211 provided on the gear box lower cover 121 and an outer positioning ring 1221 provided on the gear box upper cover 122, the inner positioning ring 1211 and the outer positioning ring 1221 are respectively located on the radial inner and outer sides, and the inner positioning ring 1211 and the outer positioning ring 1221 are radially positioned and cooperated, and can extend along the entire circumference and perform radial positioning, so that along the entire circumference, all radial directions between the gear box upper cover and the gear box lower cover are effectively positioned, and the radial positioning accuracy is high, which is beneficial to reducing the noise between the gear upper cover and the gear lower cover.

[0050] Of course, it is understandable that the positions of the inner locating ring and the outer locating ring on the gear box lower cover and the gear box upper cover can be interchanged.

[0051] Specifically, the inner positioning ring 1211 protrudes from the upper end surface of the gearbox lower cover 121, and the outer positioning ring 1221 is arranged on the inner ring of the lower port of the gearbox upper cover 122. In addition, the inner ring of the lower port of the gearbox upper cover is provided with a positioning ring groove, and the outer positioning ring 1221 is arranged on the side wall of the positioning ring groove, and the height of the inner positioning ring 1211 is lower than the height of the positioning ring groove. In this way, when the gearbox upper cover and the gearbox lower cover are assembled, the inner positioning ring and the outer positioning ring are aligned, and the radial positioning cooperation of the inner positioning ring and the outer positioning ring will not affect the axial positioning, and ensure that the radial positioning structure plays a role.

[0052] It is understandable that the radial positioning structure can also be replaced by the cooperation of positioning pins and positioning holes, that is, at least two positioning pins are evenly distributed along the circumference, and corresponding positioning holes are set on the gear box upper cover and the gear box lower cover to cooperate with the positioning pins.

[0053] In this embodiment, the axial positioning structure includes a fastener connecting the gearbox upper cover 122 and the gearbox lower cover 121, and a radial movable gap is provided between the fastener and the gearbox upper cover 122. Since a radial movable gap is provided between the fastener connecting the gearbox upper cover and the gearbox lower cover and the gearbox upper cover, the radial positioning structure can be used to first perform positioning through the radial movable gap, and then the fastener can be fixed, thereby achieving axial positioning and strengthening radial positioning.

[0054] Specifically, the fastener is a positioning screw 123, the screw head of the positioning screw is located on the upper side, the upper cover of the gear box is provided with a through hole 1222, the lower cover of the gear box is provided with a threaded hole 1212, and the positioning screw 123 passes through the through hole 1222 downward and is threadedly connected with the threaded hole 1212. The positioning screw 123 and the through hole 1222 are clearance-matched. Compared with other fastening structures, it has the advantage of convenient fixing, and after the positioning screw is tightened with the threaded hole, it has the function of realizing axial positioning and strengthening radial positioning at the same time.

[0055] Of course, it is understandable that the screw head of the positioning screw can also be oriented downward, and correspondingly, the through hole and the threaded hole are interchangeable between the gear box upper cover and the gear box lower cover. Moreover, the positioning screw can also be replaced with a positioning bolt.

[0056] The main features of the planetary gear train transmission are small size, large load-bearing capacity, stable operation and low noise. Referring to the planetary gear train structure in the prior art, specifically, the gearbox also includes a sun gear 124, a planet carrier 125 and a planetary gear 127 arranged in the gearbox body, the planetary gear is installed on the planetary carrier through a planetary pin 126, the sun gear 124 is meshed with the planetary gear 127, the output shaft 111 of the motor is connected to the sun gear 124, and the planetary carrier 125 is connected to the planetary carrier output shaft 128. The output shaft 111 of the motor is provided with a knurled section 1111 and a guide light shaft section 1112, wherein the knurled section 1111 is fixed with an interference fit to the inner hole of the sun gear, and the guide light shaft section 1112 is clearance-matched with the inner hole of the sun gear to facilitate the connection between the sun gear 124 and the output shaft 111 of the motor.

[0057] like Figure 4 As shown, the unilateral radial clearance between the inner positioning ring 1211 and the outer positioning ring 1221 is D1, the unilateral radial clearance between the fastener and the through hole is D2, and the unilateral radial clearance between the bottom edge of the gearbox upper cover and the convex edge 1213 of the top edge of the gearbox lower cover is D3, D1≤0.03mm<D2≤D3. Among them, D1 is small enough to ensure the radial positioning accuracy, and D2 is greater than D1, so that the positioning screw only plays the role of upper and lower axial limiting, so that the axial positioning structure does not affect the positioning of the radial positioning structure.

[0058] like Fig. 9 and Fig.10 As shown, the radial single-side clearance between the planet pin 126 and the inner hole of the planet wheel is D4, and D4≤0.02mm, for example, 0.02mm, 0.015mm.

[0059] like Fig.11 and Fig.12 As shown, the meshing clearance between the sun gear 124 and the planetary gear 127 is D7, and 0.2≤D7≤0.3 mm, for example, 0.3 mm, 0.25 mm.

[0060] like Figures 13 to 16 As shown, the radial single-sided interference between the inner hole of the sun gear and the knurled section 1111 of the output shaft is 0.09≤D5≤0.16mm, for example, 0.15mm, 0.1mm. The radial single-sided clearance between the inner hole of the sun gear and the guide optical axis section 1112 is D6, and 0.01≤D6≤0.07mm, for example, 0.06mm, 0.05mm.

[0061] In the above technical solution, since the parameters of the planetary gear system are finely designed, the matching accuracy between the main transmission components is improved, thereby reducing the noise of the gearbox.

[0062] Referring to the prior art, the bottom of the mixing cup is provided with an upper coupler connected to the crushing knife, the planetary frame output shaft 128 is connected with a lower coupler 13, and the upper coupler is connected to the lower coupler 13. Thus, through the coupling of the upper coupler and the lower coupler 13, the gear box 12 drives the crushing knife to rotate.

[0063] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A food processor for reducing gear box noise, comprising a main unit assembly and a mixing cup assembly arranged on the main unit assembly, wherein the mixing cup assembly comprises a mixing cup and a crushing knife arranged in the mixing cup, wherein the main unit assembly comprises a motor and a gear box, wherein the gear box comprises a gear box body composed of a gear box upper cover and a gear box lower cover, and a planetary gear train arranged in the gear box body, wherein the output shaft of the motor is connected to the input end of the planetary gear train, and the output end of the planetary gear train drives the crushing knife to rotate, wherein: An axial positioning structure and a radial positioning structure are provided between the gear box upper cover and the gear box lower cover, and the axial positioning structure does not affect the positioning of the radial positioning structure.

2. A food processor for reducing gearbox noise according to claim 1, characterized in that: The radial positioning structure comprises an inner positioning ring arranged on the lower cover of the gear box and an outer positioning ring arranged on the upper cover of the gear box, and the inner positioning ring is radially positioned and matched with the outer positioning ring.

3. A food processor with reduced gearbox noise according to claim 2, characterized in that: The inner positioning ring protrudes from the upper end surface of the gear box lower cover, and the outer positioning ring is arranged on the inner ring of the lower port of the gear box upper cover.

4. A food processing machine with reduced gearbox noise according to claim 3, characterized in that: The inner ring of the lower port of the gear box upper cover is provided with a positioning ring groove, the outer positioning ring is arranged on the side wall of the positioning ring groove, and the top end of the inner positioning ring is lower than the top end of the positioning ring groove.

5. A food processing machine with reduced gearbox noise according to claim 1, characterized in that: The axial positioning structure includes a fastener connecting the gear box upper cover and the gear box lower cover, and a radial movable gap is provided between the fastener and the gear box upper cover or the gear box lower cover.

6. A food processing machine with reduced gearbox noise according to claim 5, characterized in that: The fastener is a positioning screw. The upper cover of the gear box is provided with a through hole, and the lower cover of the gear box is provided with a threaded hole. The positioning screw passes through the through hole and is threadedly connected with the threaded hole. The positioning screw is in clearance with the through hole.

7. A food processor with reduced gearbox noise according to claim 1, characterized in that: The planetary gear system comprises a sun gear, a planet carrier and a planetary gear, wherein the planetary gear is mounted on the planet carrier through a planetary pin, the sun gear is meshed with the planetary gear, the output shaft of the motor is connected with the sun gear, and the planetary carrier drives the crushing knife to rotate.

8. A food processing machine with reduced gearbox noise according to claim 7, characterized in that: The radial single-side clearance D4 between the planet pin and the inner hole of the planet gear is ≤0.02mm; and / or the meshing side clearance between the sun gear and the planet gear is D7, 0.2≤D7≤0.3mm.

9. A food processing machine with reduced gearbox noise according to claim 7, characterized in that: The output shaft of the motor is provided with a knurled section and a guide light shaft section, the radial single-sided interference between the inner hole of the sun gear and the knurled section is D5, 0.09≤D5≤0.16mm; and / or the radial single-sided clearance between the inner hole of the sun gear and the guide light shaft section is D6, 0.01≤D6≤0.07mm.

10. A food processor with reduced gearbox noise according to claim 7, characterized in that: An upper coupler connected to the crushing knife is provided at the bottom of the mixing cup, and a lower coupler is connected to the output shaft of the planetary frame, and the upper coupler is connected to the lower coupler.

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