Motor speed reduction structure of bean grinding device of coffee machine

Abstract

The utility model discloses a coffee machine bean grinding device motor speed reduction structure which comprises a bean box detachably installed on a coffee machine shell, a bean feeding hopper connected with a bean discharging opening of the bean box and a grinding cylinder communicated with the bean feeding hopper. A grinding assembly is arranged in the grinding cylinder, and the motor speed reduction structure drives one grinding wheel in the grinding assembly. The soybean milk machine is characterized in that the motor speed reducing structure comprises a motor shaft, a first-stage planetary gear speed reducing mechanism, a second-stage planetary gear speed reducing mechanism and a transmission shaft which are in transmission connection, the soybean feeding hopper comprises an inner mounting cylinder, an outer mounting cylinder and a soybean feeding channel, and the soybean feeding channel extends downwards to an annular cavity between the inner mounting cylinder and the outer mounting cylinder; the motor speed reduction structure is installed in the inner installation cylinder, and the motor is installed over the inner installation cylinder. The two-stage planetary gear speed reducing mechanism is adopted, the speed reducer is small in occupied space, the speed reducer is directly installed below the motor shaft, and the overall structural layout is compact.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a motor speed reduction structure of a coffee machine bean grinding device. Background Art

[0002] The existing coffee bean grinding device is mainly driven by a motor to drive the grinding wheel assembly to grind the coffee beans into coffee powder. The motor and the moving grinding wheel are driven by a gear set or a gear worm, and the output of the motor speed is adjusted at the same time. However, the gear set or gear worm transmission requires a large space and is not suitable for small models. Utility Model Content

[0003] The utility model aims to provide a motor speed reduction structure for a coffee machine grinding device, so as to solve the problem that an adjustment ring is fixedly connected with fixing nails or screws, which is difficult to disassemble and causes inconvenience in later cleaning and replacement, so as to overcome the deficiencies of the prior art.

[0004] The utility model provides a motor reduction structure of a coffee machine bean grinding device through the following technical scheme, a motor reduction structure of a coffee machine bean grinding device, comprising a bean box detachably mounted on a coffee machine housing, a bean feeding hopper connected to a lower bean opening of the bean box, a grinding cylinder connected to the bean feeding hopper, a grinding assembly is arranged in the grinding cylinder, a motor reduction structure drives a grinding wheel in the grinding assembly, and is characterized in that: the motor reduction structure comprises a motor shaft, a primary planetary gear reduction mechanism, a secondary planetary gear reduction mechanism, and a transmission shaft that are transmission-connected, the bean feeding hopper comprises an inner mounting cylinder, an outer mounting cylinder, and a bean feeding channel, the bean feeding channel extends downward to an annular cavity between the inner mounting cylinder and the outer mounting cylinder, the motor reduction structure is mounted inside the inner mounting cylinder, and the motor is mounted just above the inner mounting cylinder.

[0005] The first-stage planetary gear reduction mechanism includes a first sun gear, a first planetary gear, and a first planetary gear carrier; the second-stage planetary gear reduction mechanism includes a second sun gear, a second planetary gear, and a second planetary gear carrier; the two-stage planetary gear reduction mechanism shares a gear ring; an upper cavity gear ring and a lower cavity gear ring are arranged in the gear ring; the diameter of the upper cavity gear ring is greater than the diameter of the lower cavity gear ring; a first gear ring platform is formed between the upper and lower cavity gear rings; a second gear ring platform is arranged at the bottom of the lower cavity gear ring; the first planetary gear rotates in the upper cavity gear ring, and the second planetary gear rotates in the lower cavity gear ring.

[0006] The first planetary gear carrier and the second sun gear are an integral structure.

[0007] The first planetary wheel carrier is provided with a plurality of pin holes, and the first planetary wheels are evenly installed above the first planetary wheel carrier through pin shafts; the second planetary wheel carrier is provided with a plurality of pin holes, and the second planetary wheels are evenly installed above the second planetary wheel carrier through pin shafts; the reduction shaft is connected to the transmission shaft through a spline sleeve, and the transmission shaft is connected to the inner grinding wheel of the grinding assembly.

[0008] The top opening of the gear ring is provided with a motor end cover plate, and the motor shaft passes through the motor end cover plate and is connected with the first sun gear.

[0009] The grinding cylinder is detachably sleeved on the bottom of the bean feeding hopper.

[0010] A material blocking piece and a material blocking piece torsion spring are arranged between the inner mounting cylinder and the outer mounting cylinder. The material blocking piece is provided with a paddle plate. A positioning plate corresponding to the paddle plate is arranged in the grinding cylinder. When the grinding cylinder is detached from the bean feeding hopper, the positioning plate and the push paddle plate close the port of the bean feeding channel.

[0011] The utility model has the following beneficial effects: the utility model adopts a two-stage planetary gear reduction mechanism, the reducer occupies a small space, it is directly installed below the motor shaft, and the overall structure layout is compact.

[0012] The motor and reduction mechanism are customized as a whole by the motor manufacturer according to the speed ratio requirements of the coffee machine, which reduces the assembly process of the coffee machine factory and is beneficial to production management. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the installation structure of the motor reduction structure of the utility model.

[0014] Figure 2 It is a stereoscopic diagram of the motor reduction structure of the utility model.

[0015] Figure 3 It is an exploded diagram of the motor reduction structure of the utility model.

[0016] Figure 4 The motor reduction assembly of the utility model is shown in FIG. Figure 1 .

[0017] Figure 5 The motor reduction assembly of the utility model is shown in FIG. Figure 2 .

[0018] Figure 6 It is a cross-sectional view of the gear ring of the present utility model.

[0019] A schematic diagram of the bottom structure of a grinding chamber and an adjusting ring of a motor reduction structure of a coffee machine grinding device described in the utility model.

[0020] in, Figures 1 to 3 The corresponding relationship between the reference numerals and component names in the figure is:

[0021] 1 grinding cylinder, 7 dynamic grinding wheel, 9 transmission shaft, 13 second bearing, 15 spline sleeve, 50 reduction motor group, 51 motor shaft, 52 motor end cover plate, 53 first sun gear, 54 first planetary gear, 55 first planetary gear frame, 551 second sun gear, 56 second planetary gear, 57 second planetary gear frame, 58 reduction shaft, 59 ring gear, 591 first platform of ring gear, 592 second platform of ring gear, 60 blocking piece, 61 blocking piece torsion spring, 62 bearing platform, 63 paddle, 100 bean feed hopper. DETAILED DESCRIPTION

[0022] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0023] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0024] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the 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 application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Reference Figure 1-Figure 6A motor reduction structure of a coffee machine bean grinding device comprises a bean box (not shown) detachably mounted on a coffee machine housing, a bean feeder 100 connected to a lower bean opening of the bean box, a grinding cylinder 1 connected to the bean feeder, a grinding assembly is arranged in the grinding cylinder 1, including a static grinding wheel and a dynamic grinding wheel 7, a motor reduction structure drives a grinding wheel in the grinding assembly, the motor reduction structure comprises a motor shaft, a primary planetary gear reduction mechanism, a secondary planetary gear reduction mechanism, and a transmission shaft connected in a transmission manner, the bean feeder comprises an inner mounting cylinder, an outer mounting cylinder, and a bean feed channel, the bean feed channel extends downward to an annular cavity between the inner mounting cylinder and the outer mounting cylinder, the motor reduction structure is mounted inside the inner mounting cylinder, and the motor is mounted just above the inner mounting cylinder.

[0028] The first-stage planetary gear reduction mechanism includes a first sun gear 53, a first planetary gear 54, and a first planetary gear carrier 55. The second-stage planetary gear reduction mechanism includes a second sun gear 551, a second planetary gear 56, and a second planetary gear carrier 57. The two-stage planetary gear reduction mechanism shares a gear ring 59. An upper cavity gear ring and a lower cavity gear ring are arranged in the gear ring 59. The diameter of the upper cavity gear ring is greater than that of the lower cavity gear ring. A first gear ring platform is formed between the upper and lower cavity gear rings, and a second gear ring platform is arranged at the bottom of the lower cavity gear ring. The first planetary gear rotates in the upper cavity gear ring, and the second planetary gear rotates in the lower cavity gear ring.

[0029] The first planetary gear carrier and the second sun gear are an integral structure.

[0030] The first planetary wheel carrier 55 is provided with a plurality of pin holes, the first planetary wheels 54 are evenly installed on the first planetary wheel carrier 55 through pin shafts, the second planetary wheel carrier 57 is provided with a plurality of pin holes, the second planetary wheels 56 are evenly installed on the second planetary wheel carrier 57 through pin shafts, the reduction shaft 58 is connected to the transmission shaft 9 through the spline sleeve 15, and the transmission shaft 9 is connected to the inner grinding wheel of the grinding assembly. The transmission shaft 9 is supported by a group of bearings 13.

[0031] The top opening of the 59 is provided with a motor end cover plate 52 , and the motor shaft 51 passes through the motor end cover plate 52 and is connected to the first sun gear 53 .

[0032] The grinding cylinder is detachably sleeved on the bottom of the bean feeding hopper.

[0033] A material blocking piece 60 and a material blocking piece torsion spring 61 are arranged between the inner mounting cylinder and the outer mounting cylinder. The material blocking piece is provided with a paddle plate 63. A positioning plate (not shown) corresponding to the paddle plate is arranged in the grinding cylinder. When the grinding cylinder is detached from the bean feeding hopper, the positioning plate and the push paddle plate 63 close the port of the bean feeding channel. The material blocking piece 60 is an arc ring segment, and it is mounted on a plurality of bearing platforms 62 evenly distributed on the outer wall of the inner mounting cylinder.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor reduction structure of a coffee machine bean grinding device, comprising a bean box detachably mounted on a coffee machine housing, a bean feeder connected to a lower bean opening of the bean box, a grinding cylinder connected to the bean feeder, a grinding assembly arranged in the grinding cylinder, and a grinding wheel in the grinding assembly driven by the motor reduction structure, characterized in that: The motor reduction structure includes a motor shaft, a primary planetary gear reduction mechanism, a secondary planetary gear reduction mechanism, and a transmission shaft that are transmission-connected. The bean feed hopper includes an inner mounting cylinder, an outer mounting cylinder, and a bean feed channel. The bean feed channel extends downward to an annular cavity between the inner mounting cylinder and the outer mounting cylinder. The motor reduction structure is installed inside the inner mounting cylinder, and the motor is installed just above the inner mounting cylinder.

2. The motor speed reduction structure of a coffee machine grinding device according to claim 1, characterized in that: The first-stage planetary gear reduction mechanism includes a first sun gear, a first planetary gear, and a first planetary gear carrier; the second-stage planetary gear reduction mechanism includes a second sun gear, a second planetary gear, and a second planetary gear carrier; the two-stage planetary gear reduction mechanism shares a gear ring; an upper cavity gear ring and a lower cavity gear ring are arranged in the gear ring; the diameter of the upper cavity gear ring is greater than the diameter of the lower cavity gear ring; a first gear ring platform is formed between the upper and lower cavity gear rings; a second gear ring platform is arranged at the bottom of the lower cavity gear ring; the first planetary gear rotates in the upper cavity gear ring, and the second planetary gear rotates in the lower cavity gear ring.

3. The motor speed reduction structure of a coffee machine grinding device according to claim 2, characterized in that: The first planetary gear carrier and the second sun gear are an integral structure.

4. The motor speed reduction structure of a coffee machine grinding device according to claim 3, characterized in that: The first planetary wheel carrier is provided with a plurality of pin holes, and the first planetary wheels are evenly installed above the first planetary wheel carrier through pin shafts; the second planetary wheel carrier is provided with a plurality of pin holes, and the second planetary wheels are evenly installed above the second planetary wheel carrier through pin shafts; the reduction shaft is connected to the transmission shaft through a spline sleeve, and the transmission shaft is connected to the inner grinding wheel of the grinding assembly.

5. The motor speed reduction structure of a coffee machine grinding device according to claim 4, characterized in that: The top opening of the gear ring is provided with a motor end cover plate, and the motor shaft passes through the motor end cover plate and is connected with the first sun gear.

6. A motor speed reduction structure for a coffee machine grinding device according to any one of claims 1 to 5, characterized in that: The grinding cylinder is detachably sleeved on the bottom of the bean feeding hopper.

7. The motor speed reduction structure of a coffee machine grinding device according to claim 6, characterized in that: A material blocking piece and a material blocking piece torsion spring are arranged between the inner mounting cylinder and the outer mounting cylinder. The material blocking piece is provided with a paddle plate. A positioning plate corresponding to the paddle plate is arranged in the grinding cylinder. When the grinding cylinder is detached from the bean feeding hopper, the positioning plate and the push paddle plate close the port of the bean feeding channel.

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