Food processor with speed change function

Abstract

The utility model discloses a food processor with a speed change function, which comprises a main machine assembly, the main machine assembly comprises a main motor, a planetary reduction gear and a clutch device, the planetary reduction gear comprises a shell, a sun gear, an inner gear ring and a planet carrier, the sun gear, the inner gear ring and the planet carrier are arranged in the shell, and a planet gear is mounted on the planet carrier and meshed with the inner gear ring and the sun gear respectively. The sun gear is connected with a motor shaft of the main motor; the clutch device comprises a clutch driver, an upper clutch assembly and a lower clutch assembly, the upper clutch assembly and the lower clutch assembly are arranged on the inner side of the shell and connected with the inner gear ring, and the clutch driver is used for driving the upper clutch assembly or the lower clutch assembly so that the inner gear ring and a motor shaft of the main motor can rotate together or be fixed to the shell; therefore, the planet carrier correspondingly outputs two rotating speeds. Compared with the prior art that a double-speed-change module and a double-selection module are arranged, the cost of the whole machine is reduced, clutch control is simpler, and speed reduction output is more reliable.

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] The common food processor with speed change function on the market can refer to the Chinese invention patent with publication number CN 114224204A, which includes a main machine, a processing cup, and a motor. The processing cup is provided with a stirring element driven by the motor. The food processor also includes a speed change device and a clutch device. The speed change device includes an input end, an output end, and a first speed change module and a second speed change module located between the input end and the output end. The clutch device includes a first selection module and a second selection module. The first selection module is connected to the input end and selects power connection or disconnection between the first speed change module or the second speed change module. The second selection module is connected to the output end and is power connected or disconnected between the first speed change module or the second speed change module, so that the output end outputs different speeds and drives the stirring element when the input end speed remains unchanged.

[0003] Since multiple groups of speed change modules and multiple groups of selection modules are set up, multiple groups of selection modules are used to select and switch between multiple groups of speed change modules, resulting in a complex structure of the speed change device and the clutch device, which not only affects the transmission accuracy, but also causes a large operating noise. The first speed change module and the second speed change module have independent outputs. When changing speed, the second shift head needs to select a power connection with the first speed change module and the second speed change module. In order to ensure the accuracy of the speed change switching, the requirements for the processing accuracy and control accuracy of the parts are also higher, which increases the cost of the whole machine. Utility Model Content

[0004] 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 a simplified speed change structure, improved speed change reliability, and capable of outputting at the original speed or at a changed speed without changing the output end.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a food processing machine with a speed change function, comprising a main engine component, the main engine component comprising a main motor, a planetary reduction device and a clutch device, the planetary reduction device comprising a shell and a sun gear, an inner gear ring and a planet carrier arranged in the shell, the planet carrier is mounted with planetary gears, the planetary gears are respectively meshed with the inner gear ring and the sun gear, and the sun gear is connected to the motor shaft of the main motor; the clutch device comprises a clutch driver, an upper clutch assembly and a lower clutch assembly, the upper clutch assembly and the lower clutch assembly are arranged on the inner side of the shell and connected to the inner gear ring, the clutch driver is used to drive the upper clutch assembly or the lower clutch assembly, so that the inner gear ring rotates together with the motor shaft of the main motor or is fixed to the shell, so that the planet carrier outputs two speeds accordingly.

[0006] Preferably, the outer shell includes a fixed upper cover, and the planetary reduction device also includes a transmission base connected to the motor shaft of the main motor, the fixed upper cover is arranged above the transmission base, at the first output speed, the lower clutch assembly is connected to the transmission base and the inner ring gear, and at the second output speed, the upper clutch assembly is connected to the fixed upper cover and the inner ring gear.

[0007] Preferably, the upper clutch assembly includes an upper coupling plate and an upper pressure plate, the upper coupling plate is connected to the fixed upper cover, the upper pressure plate is connected to the inner gear ring, and the upper pressure plate presses the upper coupling plate under the drive of the clutch driver, so that the upper clutch assembly and the inner gear ring are fixedly connected to the fixed upper cover; the lower clutch assembly includes a lower coupling plate and a lower pressure plate, the lower coupling plate is connected to the inner gear ring, and the lower pressure plate is connected to the transmission base, and the lower pressure plate presses the lower coupling plate under the drive of the clutch driver, so that the lower clutch assembly is transmission-connected to the inner gear ring and the transmission base.

[0008] Preferably, the upper clamping plate includes an upper clamping plate 1 arranged on the upper side of the upper coupling plate, and an upper clamping plate 2 arranged on the lower side of the upper coupling plate. When the upper clamping plate 2 moves upward under the drive of the clutch driver, it cooperates with the upper clamping plate 1 to clamp the upper coupling plate; the lower clamping plate includes a lower clamping plate 1 arranged on the upper side of the lower coupling plate, and a lower clamping plate 2 arranged on the lower side of the lower coupling plate. When the lower clamping plate 1 moves downward under the drive of the clutch driver, it cooperates with the lower clamping plate 2 to clamp the lower coupling plate.

[0009] Preferably, the upper coupling plate is spline-connected to the fixed upper cover, and the upper clamping plate is spline-connected to the inner gear ring; and / or, the lower coupling plate is spline-connected to the inner gear ring, and the lower clamping plate is spline-connected to the transmission base.

[0010] Preferably, a concave-convex bite structure is provided between the upper coupling plate and the upper pressing plate; and / or a concave-convex bite structure is provided between the lower coupling plate and the lower pressing plate.

[0011] Preferably, the clutch driver comprises a clutch motor, a clutch transmission assembly and a pressing block, and the clutch motor drives the pressing block to move up and down through the clutch transmission assembly.

[0012] Preferably, the clutch transmission assembly includes a clutch gear and a clutch ring gear, the motor shaft of the clutch motor is connected to the clutch gear, the clutch ring gear is meshed with the clutch gear, the clutch ring gear is provided with an internal thread, the clamping block is provided with an external thread, and the internal thread is connected to the external thread.

[0013] Preferably, an upper positioning convex ring is provided on the upper part of the clutch gear ring, and a lower positioning convex ring is provided on the lower part, the upper positioning convex ring is rotationally matched with the upper positioning ring groove, and the lower positioning convex ring is rotationally matched with the lower positioning ring groove.

[0014] Preferably, a bearing is installed in the fixed upper cover, and the inner gear ring is rotatably supported by the bearing.

[0015] The technical solution adopted by the utility model has the following beneficial effects:

[0016] 1. Only one planetary reduction device is provided, and a conventional planetary reduction device can be used. The main characteristics of planetary gear transmission are small size, large load-bearing capacity, and stable operation. The requirements for the processing accuracy and control accuracy of parts can be in accordance with the conventional ones. Compared with the prior art of setting a dual speed module and a dual selection module, the cost of the whole machine is reduced.

[0017] The planetary reduction device has only one output, namely the planetary carrier, but the planetary carrier can have two output speeds, and can output at the original speed or variable speed without changing the output end. The switching of the two output speeds only requires one clutch device to control. Therefore, compared with the prior art of setting up a dual speed module and a dual selection module, the structure is much simpler, the clutch control is simpler, and the reduction output is more reliable.

[0018] The planetary reduction device uses the inner gear ring as the intermediate transition of speed change. The inner gear ring rotates when the original speed is output, and the inner gear ring is fixed when the speed is changed. This enables the food processor to have different speed outputs on the premise of a single output end. Although the prior art can also achieve different speed outputs at the same end, the different speed outputs of the prior art are usually at different output ends. In addition, in the deceleration scheme of the prior art, in the deceleration state, multiple deceleration components do not participate in the work and are unloaded. The unloaded components do not transmit to other components, and are prone to autonomous vibration and noise during operation. In addition, the unloaded components will also produce disordered collisions with each other, affecting the life of the components themselves. In the solution of the utility model, the inner gear ring is used as a speed change unit for transmission during speed change output, and is transmitted with the planetary gear, and the motor shaft, sun gear, and planetary carrier are transmitted at the same time; the inner gear ring is mutually locked with the motor shaft, sun gear, planetary gear, planetary carrier, etc. and rotates synchronously during original speed output, so that at two output speeds, there will be no no-load condition between the various components, which effectively solves the problem of vibration and impact during no-load in the prior art, that is, different speed outputs are achieved at the same output end, which effectively reduces working noise and increases the effective service life of the food processor.

[0019] 2. Since the transmission base is fixed to the motor shaft, the transmission base and the motor shaft rotate synchronously at the same speed. Therefore, at the first output speed, the lower clutch assembly connects the transmission base and the inner gear ring, and the inner gear ring rotates together with the motor shaft; since the fixed upper cover is relatively fixed and cannot rotate, at the second output speed, the upper clutch assembly connects the fixed upper cover and the inner gear ring, and the inner gear ring is fixed.

[0020] 3. When the upper clamping plate 2 moves upward under the drive of the clutch driver, it cooperates with the upper clamping plate 1 to press the upper coupling plate, so that the upper clutch assembly fixes the inner gear ring to the fixed upper cover reliably to ensure that the inner gear ring cannot rotate; when the lower clamping plate 1 moves downward under the drive of the clutch driver, it cooperates with the lower clamping plate 2 to press the lower coupling plate, so that the lower clutch assembly fixes the inner gear ring to the transmission base reliably to ensure that the inner gear ring rotates together with the motor shaft.

[0021] 4. Since the upper coupling piece is spline-connected to the fixed upper cover, and the fixed upper cover is always fixed, the upper pressing piece 1 and the upper pressing piece 2 are spline-connected to the inner gear ring, so the upper coupling piece cannot rotate at all. When the upper pressing piece 1 and the upper pressing piece 2 cooperate to press the upper coupling piece, the inner gear ring cannot rotate either;

[0022] Since the lower coupling plate is splined to the inner gear ring, and the lower clamping plate 1 and the lower clamping plate 2 are splined to the transmission base, the lower coupling plate can drive the inner gear ring to rotate. When the lower clamping plate 1 and the lower clamping plate 2 cooperate to clamp the lower coupling plate, the inner gear ring rotates together with the transmission base and the motor shaft.

[0023] 5. Since a concave-convex bite structure is provided between the upper coupling plate and the upper clamping plate 1 and the upper clamping plate 2, when the upper clamping plate 1 and the upper clamping plate 2 cooperate to clamp the upper coupling plate, the upper coupling plate and the upper clamping plate 1 and the upper clamping plate 2 cannot rotate relative to each other; since a concave-convex bite structure is provided between the lower coupling plate and the lower clamping plate 1 and the lower clamping plate 2, when the lower clamping plate 1 and the lower clamping plate 2 cooperate to clamp the lower coupling plate, the lower coupling plate and the lower clamping plate 1 and the lower clamping plate 2 can rotate synchronously.

[0024] 6. Since the clutch gear ring is meshed with the clutch gear, and the internal thread of the clutch gear ring is connected to the external thread on the clamping block, the clutch gear drives the clutch gear ring to rotate while following the rotation of the motor shaft of the clutch motor, and drives the clamping block to move up and down. The clutch process can be precisely controlled, and after the speed change is switched, the force is maintained large to ensure reliable speed output.

[0025] 7. Since the upper positioning convex ring of the clutch gear ring rotates with the upper positioning ring groove, and the lower positioning convex ring of the clutch gear ring rotates with the lower positioning ring groove, the clutch gear ring is positioned radially and axially to ensure accurate meshing transmission with the clutch gear and the clamping block.

[0026] 8. Since the inner gear ring is rotatably supported by the bearing, when the inner gear ring rotates together with the motor shaft of the main motor, the friction force during the rotation of the inner gear ring is reduced through the rolling support of the bearing, which is beneficial to reducing noise.

[0027] 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

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0029] 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;

[0030] 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;

[0031] Figure 3 is a front view of the blender cup assembly;

[0032] Figure 4 for Figure 3 Sectional view at point A;

[0033] Figure 5 It is a cross-sectional view of the main structure of the host component;

[0034] Figure 6 for Figure 5 Sectional view at point B;

[0035] Figure 7 It is an exploded view of the main structure of the host component;

[0036] Figure 8 It is a cross-sectional view of the matching part of the planetary reduction device and the clutch device;

[0037] Fig. 9 It is a cross-sectional view of the matching part of the planetary reduction device and the clutch device;

[0038] Fig.10 It is the main cross-sectional view of the host assembly;

[0039] Fig.11 for Fig.10 Sectional view at point C in the middle;

[0040] Fig.12 It is the main cross-sectional view of the host assembly;

[0041] Fig.13 for Fig.12 Sectional view at point D;

[0042] In the figure: main machine component 1, main motor 11, first motor shaft 111, motor bracket 112, lower positioning ring groove 1121, planetary reduction device 12, transmission base 121, fixed upper cover 122, upper positioning ring groove 1221, inner ring gear 123, planetary gear 124, planetary carrier 125, sun gear 126, bearing 127, clutch device 13, clutch motor 131, clutch gear 132, clutch ring gear 133, clamping block 134, upper clutch assembly 135, upper coupling plate 1351, upper clamping plate 2 1352, upper clamping plate 1 1353, lower clutch assembly 136, lower coupling plate 1361, lower clamping plate 2 1362, lower clamping plate 1 1363, lower coupler 14, stirring cup assembly 2, crushing knife 21, upper coupler 22. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figures 1 to 13 As shown, this embodiment provides a food processing machine, which is specifically described in conjunction with a wall breaking machine as an example, including 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 21 arranged in the mixing cup, and the main unit component 1 includes a main motor 11, a planetary reduction device 12 and a clutch device 13.

[0048] The planetary reduction gear 12 includes a sun gear 126, an inner gear ring 123, a planet carrier 125, and a planetary gear 124 mounted on the planetary gear carrier. The sun gear 126, the inner gear ring 123, the planetary gear carrier 125, and the planetary gear 124 are arranged in the housing, and the planetary gear 124 is meshed with the inner gear ring 123 and the sun gear 126 respectively, and the sun gear 126 is connected to the motor shaft of the main motor 11. The clutch device 13 includes a clutch driver, an upper clutch assembly 135, and a lower clutch assembly 136. The upper clutch assembly 135 and the lower clutch assembly 136 are arranged on the inner side of the housing and connected to the inner gear ring 123. The clutch driver is used to drive the upper clutch assembly 135 or the lower clutch assembly 136, so that the inner gear ring 123 rotates together with the motor shaft of the main motor or is fixed to the housing, so that the planetary gear carrier 125 outputs two speeds accordingly, namely the first output speed and the second output speed.

[0049] The planetary reduction device has only one output, namely the planetary carrier, but the planetary carrier can have two output speeds, and can output at the original speed or variable speed without changing the output end. The switching of the two output speeds only requires one clutch device to control. Therefore, compared with the prior art of setting up a dual speed module and a dual selection module, the structure is much simpler, the clutch control is simpler, and the reduction output is more reliable.

[0050] The planetary reduction device uses the inner gear ring as the intermediate transition of speed change. The inner gear ring rotates when the original speed is output, and the inner gear ring is fixed when the speed is changed. This enables the food processor to have different speed outputs on the premise of a single output end. Although the prior art can also achieve different speed outputs at the same end, the different speed outputs of the prior art are usually at different output ends. In addition, in the deceleration scheme of the prior art, in the deceleration state, multiple deceleration components do not participate in the work and are unloaded. The unloaded components do not transmit to other components, and are prone to autonomous vibration and noise during operation. In addition, the unloaded components will also produce disordered collisions with each other, affecting the life of the components themselves. In the solution of the utility model, the inner gear ring is used as a speed change unit for transmission during speed change output, and is transmitted with the planetary gear, and the motor shaft, sun gear, and planetary carrier are transmitted at the same time; the inner gear ring is mutually locked with the motor shaft, sun gear, planetary gear, planetary carrier, etc. and rotates synchronously during original speed output, so that at two output speeds, there will be no no-load condition between the various components, which effectively solves the problem of vibration and impact during no-load in the prior art, that is, different speed outputs are achieved at the same output end, which effectively reduces working noise and increases the effective service life of the food processor.

[0051] Furthermore, the planetary reduction device 12 also includes a transmission base 121, and the housing includes a fixed upper cover 122. The fixed upper cover 122 is located on the upper side of the transmission base. The main motor 11 is installed on the motor bracket 112. The transmission base 121 is arranged on the inner side of the motor bracket 112. The motor bracket 112 and the upper fixed upper cover 122 form a housing together, and the planetary gear components are installed inside. The transmission base 121 is fixed to the motor shaft of the column motor, so the transmission base and the motor shaft rotate synchronously with the same speed. The fixed upper cover 122 is fixed to the motor bracket 112, so the fixed upper cover cannot rotate. At the first output speed, the lower clutch assembly connects the transmission base and the inner gear ring, and the inner gear ring rotates with the motor shaft. At the second output speed, the upper clutch assembly connects the fixed upper cover and the inner gear ring, and the inner gear ring is fixed.

[0052] The clutch device 13 includes a clutch driver, an upper clutch assembly 135, and a lower clutch assembly 136. The clutch device is used to rotate or stop the inner gear ring together with the motor shaft, so that the planetary reduction device 12 outputs different transmission ratios without changing the mixing cup. Specifically, when the clutch driver drives the lower clutch assembly downward, the lower clutch assembly fixes the inner gear ring with the transmission base, so that the inner gear ring rotates with the motor shaft of the main motor, and finally the planetary carrier outputs a speed ratio of i1, that is, the first output speed; when the clutch driver drives the upper clutch assembly upward, the upper clutch assembly fixes the inner gear ring with the fixed upper cover, and at this time the inner gear ring does not rotate, and finally the planetary carrier outputs a speed ratio of i2, that is, the second output speed.

[0053] As an embodiment, the clutch driver includes a clutch motor 131, a clutch transmission assembly and a clamping block 134. The clutch motor 131 drives the clamping block 134 to move up and down through the clutch transmission assembly, and the clamping block 134 drives the upper clutch assembly 135 or the lower clutch assembly 136. The clutch transmission assembly includes a clutch gear 132 and a clutch ring gear 133. Among them, the motor shaft of the clutch motor 131 is connected to the clutch gear 132, the clutch ring gear 133 is meshed with the clutch gear 132, the clutch ring gear 133 is provided with an internal thread, and the clamping block 134 is provided with an external thread, and the internal thread is connected to the external thread. Therefore, the clutch gear rotates with the motor shaft while driving the clutch ring gear to rotate, and the clutch ring gear drives the clamping block to move up and down, the clutch process can be precisely controlled, and after the speed change is switched, the force is kept large to ensure reliable speed output.

[0054] It is understandable that the clutch transmission assembly can also be implemented with other structures, as long as the rotation of the motor shaft of the clutch motor can be converted into the up and down linear movement of the clamping block, such as a gear rack mechanism.

[0055] Specifically, the upper clutch assembly 135 includes an upper coupling piece 1351 connected to the fixed upper cover, an upper clamping piece 1 1353 disposed on the upper side of the upper coupling piece, and an upper clamping piece 2 1352 disposed on the lower side of the upper coupling piece. The upper clamping piece 1 and the upper clamping piece 2 are connected to the inner gear ring, and when the upper clamping piece 2 moves upward under the drive of the clutch driver, they cooperate with the upper clamping piece 1 to clamp the upper coupling piece. The lower clutch assembly 136 includes a lower coupling piece 1361 connected to the inner gear ring, a lower clamping piece 1 1363 disposed on the upper side of the lower coupling piece, and a lower clamping piece 2 1362 disposed on the lower side of the lower coupling piece. The lower clamping piece 1 and the lower clamping piece 2 are connected to the transmission base, and when the lower clamping piece 1 moves downward under the drive of the clutch driver, it cooperates with the lower clamping piece 2 to clamp the lower coupling piece.

[0056] Among them, the upper coupling piece 1351 is spline-connected with the fixed upper cover 122, which can achieve circumferential locking. The upper clamping piece 1 1353 and the upper clamping piece 2 1352 are spline-connected with the inner gear ring 123, which can achieve circumferential locking. When the upper clamping piece 1 and the upper clamping piece 2 cooperate to clamp the upper coupling piece, the fixed upper cover 122 restricts the rotation of the inner gear ring 123. The lower coupling piece 1361 is spline-connected with the inner gear ring 123 and can rotate together. The lower clamping piece 1 1363 and the lower clamping piece 2 1362 are spline-connected with the transmission base 121 and can rotate together. When the lower clamping piece 1 and the lower clamping piece 2 cooperate to clamp the lower coupling piece, the transmission base 121 drives the inner gear ring 123 to rotate.

[0057] A concave-convex bite structure is provided between the upper coupling piece 1351 and the upper pressing piece 1 1353 and the upper pressing piece 2 1352. A concave-convex bite structure is provided between the lower coupling piece 1361 and the lower pressing piece 1 1363 and the lower pressing piece 2 1362. That is, one of the upper and lower parts is provided with a concave portion, and the other is provided with a convex portion. In this embodiment, the upper coupling piece 1351, the upper clamping piece 1 1353 and the upper clamping piece 2 1352 are provided with a plurality of concave structures formed by downward stamping distributed along the circumferential direction, and the lower coupling piece 1361, the lower clamping piece 1 1363 and the lower clamping piece 2 1362 are provided with a plurality of concave structures formed by downward stamping distributed along the circumferential direction, thereby forming a concave portion on the upper side and a convex portion on the lower side. When the upper clamping piece 2 moves upward under the drive of the clamping block, it cooperates with the upper clamping piece 1 to clamp the upper coupling piece, and the concave-convex bite structure realizes bite. In addition, an elastic reset structure, such as a spring and a spring sheet, is provided between the upper coupling piece 1351 and the upper clamping piece 1 1353 and the upper clamping piece 2 1352. After the clamping block moves in the opposite direction, the concave-convex bite structure is separated by the elastic reset structure. When the lower clamping plate 1 moves downward under the drive of the clamping block, it cooperates with the lower clamping plate 2 to clamp the lower coupling plate, and the concave-convex bite structure realizes the bite. In addition, an elastic reset structure, such as a spring and a spring, is provided between the lower coupling plate 1361 and the lower clamping plate 1 1363 and the lower clamping plate 2 1362. After the clamping block moves in the opposite direction, the concave-convex bite structure is separated by the elastic reset structure.

[0058] According to the above description, the structures and functions of the upper clutch assembly 135 and the lower clutch assembly 136 are similar. It is understandable that the structures of both the upper clutch assembly 135 and the lower clutch assembly 136 can be replaced by other structures with similar functions, for example, a tooth surface meshing structure, a pin hole matching structure, etc. are adopted between the coupling sheet and the corresponding pressing sheet. In addition, the spline connection described above can also be replaced by a flat key connection or a gear ring meshing, etc.

[0059] Furthermore, a bearing 127 is installed in the fixed upper cover 122. The inner gear ring 123 is rotatably supported by the bearing 127. A bearing mounting groove is provided on the fixed upper cover 122, and the inner gear ring includes an upper support shaft portion, a lower gear ring portion, and a middle flange in the middle, wherein the support shaft portion is connected to the bearing 127. Since the inner gear ring 123 is rotatably supported by the bearing 127, when the inner gear ring rotates with the motor shaft of the main motor, the friction force during the rotation of the inner gear ring is reduced through the rolling support of the bearing, which is conducive to reducing noise.

[0060] Specifically, the fixed upper cover 122 is provided with an upper positioning ring groove 1221, the motor bracket 112 is provided with a lower positioning ring groove 1121, the clutch gear ring 133 is provided with an upper positioning convex ring on the upper part and a lower positioning convex ring on the lower part, the upper positioning convex ring is rotationally matched with the upper positioning ring groove 1221, and the lower positioning convex ring is rotationally matched with the lower positioning ring groove 1121. Since the upper positioning convex ring is rotationally matched with the upper positioning ring groove, and the lower positioning convex ring is rotationally matched with the lower positioning ring groove, the clutch gear ring is positioned in both radial and axial directions to ensure accurate meshing transmission with the clutch gear and the clamping block.

[0061] Referring to the prior art, the bottom of the blending cup is provided with an upper coupler 22 connected to the crushing blade, and the main unit assembly 1 is further provided with a lower coupler 14. The lower coupler 14 is connected to the planetary frame 125, and the upper coupler 22 is connected to the lower coupler 14. Since the lower coupler and the planetary frame are always connected, it is not necessary for the planetary frames of multiple planetary reduction devices to switch the connection with the output shaft when changing speeds as in the prior art, which is more reliable.

[0062] 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 processing machine with a speed-changing function, comprising a main engine assembly, wherein the main engine assembly comprises a main motor, a planetary reduction device and a clutch device, wherein: The planetary reduction device includes a shell and a sun gear, an inner gear ring, and a planet carrier arranged in the shell. The planet carrier is mounted with planetary gears, which are respectively meshed with the inner gear ring and the sun gear. The sun gear is connected to the motor shaft of the main motor. The clutch device includes a clutch driver, an upper clutch assembly, and a lower clutch assembly. The upper clutch assembly and the lower clutch assembly are arranged on the inner side of the shell and connected to the inner gear ring. The clutch driver is used to drive the upper clutch assembly or the lower clutch assembly so that the inner gear ring rotates together with the motor shaft of the main motor or is fixed to the shell, so that the planet carrier outputs two speeds accordingly.

2. A food processor with a speed-changing function according to claim 1, characterized in that: The housing includes a fixed upper cover, and the planetary reduction device also includes a transmission base connected to the motor shaft of the main motor. The fixed upper cover is arranged above the transmission base. At a first output speed, the lower clutch assembly is connected to the transmission base and the inner gear ring. At a second output speed, the upper clutch assembly is connected to the fixed upper cover and the inner gear ring.

3. A food processor with a speed-changing function according to claim 2, characterized in that: The upper clutch assembly includes an upper coupling plate and an upper pressing plate, the upper coupling plate is connected to the fixed upper cover, the upper pressing plate is connected to the inner gear ring, and the upper pressing plate presses the upper coupling plate under the drive of the clutch driver, so that the upper clutch assembly and the inner gear ring are fixedly connected to the fixed upper cover; the lower clutch assembly includes a lower coupling plate and a lower pressing plate, the lower coupling plate is connected to the inner gear ring, and the lower pressing plate is connected to the transmission base, and the lower pressing plate presses the lower coupling plate under the drive of the clutch driver, so that the lower clutch assembly is transmission-connected to the inner gear ring and the transmission base.

4. A food processor with a speed-changing function according to claim 3, characterized in that: The upper clamping plate includes an upper clamping plate 1 arranged on the upper side of the upper coupling plate and an upper clamping plate 2 arranged on the lower side of the upper coupling plate. When the upper clamping plate 2 moves upward under the drive of the clutch driver, it cooperates with the upper clamping plate 1 to clamp the upper coupling plate; the lower clamping plate includes a lower clamping plate 1 arranged on the upper side of the lower coupling plate and a lower clamping plate 2 arranged on the lower side of the lower coupling plate. When the lower clamping plate 1 moves downward under the drive of the clutch driver, it cooperates with the lower clamping plate 2 to clamp the lower coupling plate.

5. The food processor with speed-changing function according to claim 3, characterized in that: The upper coupling plate is spline-connected to the fixed upper cover, and the upper clamping plate is spline-connected to the inner gear ring; and / or, the lower coupling plate is spline-connected to the inner gear ring, and the lower clamping plate is spline-connected to the transmission base.

6. The food processor with speed-changing function according to claim 3, characterized in that: A concave-convex bite structure is provided between the upper coupling plate and the upper pressing plate; and / or a concave-convex bite structure is provided between the lower coupling plate and the lower pressing plate.

7. The food processor with speed-changing function according to claim 1, characterized in that: The clutch driver comprises a clutch motor, a clutch transmission assembly and a pressing block. The clutch motor drives the pressing block to move up and down through the clutch transmission assembly.

8. The food processor with speed-changing function according to claim 7, characterized in that: The clutch transmission assembly includes a clutch gear and a clutch gear ring. The motor shaft of the clutch motor is connected to the clutch gear. The clutch gear ring is meshed with the clutch gear. The clutch gear ring is provided with an internal thread. The clamping block is provided with an external thread. The internal thread is connected to the external thread.

9. The food processor with speed-changing function according to claim 8, characterized in that: An upper positioning convex ring is provided on the upper part of the clutch gear ring, and a lower positioning convex ring is provided on the lower part. The upper positioning convex ring is rotationally matched with the upper positioning ring groove, and the lower positioning convex ring is rotationally matched with the lower positioning ring groove.

10. The food processor with speed-changing function according to claim 2, characterized in that: A bearing is installed inside the fixed upper cover, and the inner gear ring is rotatably supported by the bearing.

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