Brewing device structure driven by eccentric gear and rack and capable of controlling sequence of rotation and piston movement

Abstract

The invention discloses an eccentric gear and rack driven brewing device structure capable of controlling rotation and piston movement sequence, and belongs to the technical field of brewing devices, the eccentric gear and rack driven brewing device structure comprises a brewing end and a mounting shell, a piston is slidably mounted in the brewing end, and a power structure capable of driving the piston to move up and down is arranged in the mounting shell; the piston can reach the top of the brewing cavity under the action of the power structure, a single rack is matched with the gear transmission set, a double-rack structure is replaced, and the number of parts is reduced by more than 30%; the requirement for assembly precision is low, the assembly time is shortened by 40%, the production efficiency can be remarkably improved, the eccentric design of the racks can stably provide the rotating torque F, and the problem that the torque in a double-rack structure is mutually counteracted is solved; the rotating torque F directly acts on the brewing device, the brewing device can be easily driven to rotate by an angle a, the movement sequence (first rotation and then straight line) is limited by the structure, an additional control mechanism is not needed, and the operation reliability is improved by more than 60%.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brewing device structure, and particularly relates to an eccentric gear and rack driven brewing device structure capable of controlling rotation and piston movement sequence. BACKGROUND

[0002] In modern kitchen life and commercial beverage service scenarios, full-automatic coffee machines have become mainstream products in the market because they can omit the cumbersome steps of manual grinding of coffee beans and manual extraction of coffee, and can make standardized coffee beverages in a convenient and efficient manner. However, the built-in brewing device of the traditional full-automatic coffee machine has many structural and functional limitations in long-term use, and the core problems are concentrated in complex movement sequence, poor running reliability, and high failure rate. Although the industry has made many structural improvements, it has not fundamentally solved the key defects.

[0003] The mainstream brewing device driving structure on the market currently adopts a double-rack gear transmission design, which has the following significant deficiencies:

[0004] High precision and synchronization requirement: the double-rack transmission requires two driving gears to keep highly synchronized operation, and the manufacturing precision (such as pitch error and roundness error) and assembly precision (such as parallelism of two gear shafts and consistency of spacing) of the gears are required to be harsh, and the movement may be jammed due to unqualified precision in the production process;

[0005] Insufficient and difficult to control rotation torque: the double rack drives the brewing device from both sides, which can achieve uniform force on the rack, but the rotation torque generated on both sides cancels each other out, resulting in a small overall rotation torque, which cannot stably drive the brewing device to rotate; if the rotation action needs to be realized, the torque difference of the two driving gears or additional upward resistance needs to be relied on, which is difficult to operate and easy to cause component wear;

[0006] Complex structure and high cost: the double-rack design needs to additionally configure two sets of gears, racks and synchronous control components, which has many parts and complicated assembly steps, thereby increasing the manufacturing cost, and increasing the difficulty and cost of later maintenance.

[0007] In view of the defects of the above-mentioned prior art, a brewing device driving structure capable of providing stable rotation torque, simplifying the structure and reducing the precision requirement is needed to realize reliable sequence control of the rotation of the brewing device and the linear movement of the piston, and to improve the production efficiency and reduce the manufacturing cost. SUMMARY

[0008] The technical problem to be solved by the application is to overcome the existing defects, and to provide an eccentric gear and rack driven brewing device structure capable of controlling rotation and piston movement sequence, which specifically realizes the following objectives:

[0009] Simplify the structure design, reduce the number of parts, reduce the assembly difficulty and precision requirement;

[0010] Provide stable and sufficient rotation torque, avoid torque offset problem, and ensure the sequence controllable of the rotation of the brewing device and the movement of the piston;

[0011] Improve the operation reliability, reduce the failure rate, and reduce the production and maintenance cost;

[0012] Through a single driving gear, the rotation switching of the brewing device from the grinding position A to the pressing position B and the linear movement of the piston are realized, and the power transmission path is simplified.

[0013] To achieve the above purpose, the present application provides the following technical scheme:

[0014] A brewing device driven by an eccentric gear and rack, which can control the sequence of rotation and piston movement, comprising a brewing end and a mounting shell, a piston is slidably installed inside the brewing end, a power structure capable of driving the piston to move up and down is arranged inside the mounting shell, the piston can reach the top of the brewing chamber under the action of the power structure, and blocking pieces capable of preventing excessive rotation are arranged on the outside of the brewing end.

[0015] As a preferred technical scheme of the present application, the power structure comprises a U-shaped plate slidably installed inside the mounting shell, a rack is arranged inside one side of the U-shaped plate, and a rack transmission gear is installed inside the mounting shell and engaged with the rack.

[0016] As a preferred technical scheme of the present application, a knob is rotatably installed on the outside of the mounting shell, an installation shaft is installed inside the knob, the installation shaft penetrates and extends into the inside of the mounting shell and is connected with a driving gear, and the driving gear is connected with the rack transmission gear through an intermediate gear.

[0017] As a preferred technical scheme of the present application, two bosses are arranged on the teeth of the driving gear.

[0018] As a preferred technical scheme of the present application, a convex plate is installed on the surface of the U-shaped plate, and a concave plate matched with the convex plate is installed at the top end of the mounting shell.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] Simple structure, convenient assembly: a single rack is used to replace the double rack structure, and the number of parts is reduced by more than 30%; the assembly precision requirement is low (no need to ensure the synchronization of double gears), the assembly time is shortened by 40%, and the production efficiency can be significantly improved;

[0021] Large rotation torque and reliable sequence: the eccentric design of the rack can stably provide a rotation torque F, avoiding the problem of torque cancellation in a double-rack structure; the rotation torque F directly acts on the brewing device, easily driving the brewing device to rotate by an angle a, and the movement sequence (first rotation, then straight line) is defined by the structure itself, without the need for additional control mechanisms, and the operation reliability is improved by more than 60%;

[0022] Low manufacturing cost and convenient maintenance: the number of parts is reduced and the precision requirement is lowered, reducing the raw material cost and processing cost by 25-30%; after the structure is simplified, the components are more convenient to disassemble and replace during later maintenance, reducing the maintenance cost;

[0023] Stable operation and low failure rate: through the guiding and limiting design of the driving guide column, the convex plate and the concave plate, the movement deviation of the components is avoided; the convex boss of the driving gear can prevent excessive rotation and reduce component wear, reducing the failure rate by more than 50% compared with the double-rack structure;

[0024] High function integration: only one driving gear is needed to realize the two core functions of "rotating the brewing device from the grinding position A to the pressing position B" and "linear motion of the piston to complete the pressing and powder removal", simplifying the power transmission path and reducing energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0026] Figure 2 is a schematic diagram of the internal structure of the present application;

[0027] Figure 3 is a schematic diagram of the cross-sectional structure of the present application;

[0028] Figure 4 is a schematic diagram of the rack structure of the present application;

[0029] Figure 5 is a schematic diagram of the driving relationship structure of the present application;

[0030] Figure 6 is a schematic diagram of the present application when it starts to rotate after the coffee powder 16 is inserted (position A);

[0031] Figure 7 is a schematic diagram of the present application when it is pressed by the pressing rod 19 and the water inlet pipe 18 to make coffee (position B);

[0032] Figure 8 is a schematic diagram of the present application when the driving gear 3 continues to rotate and pushes out the coffee cake 17 (position C);

[0033] Figure 9 is a schematic diagram of the present application when the driving wheel direction is changed (position D);

[0034] Figure 10 Fig. 1 is a schematic view of the present application when rotated to the initial position (position E);

[0035] Figure 11 Fig. 2 is a schematic view of the present application when the piston reaches the bottom when rotated to the initial position (position F);

[0036] 1-piston; 2-rack gear; 3-driving gear; 4-rack; 5-intermediate gear; 6-brewing cavity; 7-brewer; 8-mounting shell; 9-knob; 10-U-shaped plate; 11-limiting block; 12-convex plate; 13-concave plate; 14-convex boss; 15-stop; 16-coffee powder; 17-coffee cake; 18-water inlet pipe; 19-powder pressing rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Please refer to Figures 1-11 The present application provides a technical solution:

[0039] A brewing device structure driven by an eccentric gear and rack, capable of controlling the sequence of rotation and piston movement, comprising a brewing end 7, a mounting shell 8, a piston 1 and a power transmission structure, the piston 1 being slidingly installed in a brewing cavity 6 inside the brewing end 7 and being movable up and down along the brewing cavity 6.

[0040] The key technical features are as follows:

[0041] 1. Core components and structure design

[0042] Brewing end and piston: the brewing end 7 is a hollow cavity structure, and a brewing cavity 6 for containing coffee powder 16 and completing brewing is formed inside; the piston 1 is in sealing cooperation with the inner wall of the brewing cavity 6 and can slide along the brewing cavity 6 under the driving of the power structure, so as to realize the compaction of coffee powder 16, the pushing out of the coffee cake after coffee extraction and the like;

[0043] Power transmission structure: arranged inside the mounting shell 8, used for driving the movement of the piston 1 and the rotation of the brewing device, and specifically comprising:

[0044] U-shaped plate 10: slidingly installed inside the mounting shell 8 and movable up and down along the inner wall of the mounting shell 8, one side of which is fixedly connected with the piston 1 and used for driving the piston 1 to move synchronously;

[0045] Rack 4: fixedly installed on one side of the inner side of the U-shaped plate 10, synchronously moving with the U-shaped plate 10; the rack 4 adopts an eccentric design-the driving rack 41 is eccentrically arranged relative to the center axis of the piston 1, and the opposite side of the rack 4 is provided with a driving guide column 42 which is in sliding fit with the guide groove on the inner wall of the mounting shell 8, and has the functions of guiding and balancing stress, avoiding the deviation of the rack 4 during movement;

[0046] Gear transmission group: including rack transmission gear 2, intermediate gear 5 and driving gear 3; the rack transmission gear 2 is rotatably installed in the inside of the mounting shell 8 and is in mesh with the tooth surface of the rack 4, so as to drive the rack 4 to move linearly up and down; the intermediate gear 5 is also rotatably installed in the mounting shell 8 and is in mesh with the rack transmission gear 2 and the driving gear 3 respectively, so as to realize the transmission of power from the driving gear 3 to the rack transmission gear 2; the tooth part of the driving gear 3 is provided with two bosses 14 which are used to assist in limiting the limit position of the gear transmission, so as to avoid damage to the components caused by excessive rotation;

[0047] Manual driving component: the knob 9 is rotatably installed on the outside of the mounting shell 8, the inside of the knob 9 is fixedly provided with a mounting shaft which penetrates and extends into the inside of the mounting shell 8 and is fixedly connected with the center hole of the driving gear 3; rotating the knob 9 can drive the driving gear 3 to rotate synchronously, so as to realize the input of power;

[0048] Guide and limiting structure: the convex plate 12 is fixedly installed on the surface of the U-shaped plate 10, and the concave plate 13 is fixedly installed on the corresponding position of the top end of the mounting shell 8; the convex plate 12 can slide along the groove of the concave plate 13, which provides guidance for the up and down movement of the U-shaped plate 10 and limits the movement stroke of the U-shaped plate 10 through the groove of the concave plate 13, so as to avoid overtravel.

[0049] 2. Motion sequence control principle

[0050] Through the eccentric design of the rack 4, when the driving gear 3 rotates, the rack 4 will be subjected to a rotational torque F generated by the eccentricity, which will drive the whole brewing device to rotate first; when the brewing device rotates to a preset angle a, it is blocked and limited by the external blocking piece 15 and cannot continue to rotate; at this time, the driving gear 3 continues to rotate, and the power is converted into linear motion of the rack 4 through the gear transmission group, and then drives the piston 1 to slide up and down. Through this design, the sequence control of "rotation first and then linear motion" is realized, and only one driving gear 3 is needed to complete the position switching of the brewing device and the movement of the piston.

[0051] The working cycle process of the present application will be described in detail below in combination with the drawings Figures 6 to 11 and specific application scenarios, and the structure, function and motion sequence control of a complete coffee making cycle will be further described:

[0052] 1. Initial state: grinding position A,Figure 6

[0053] Initially, the brewer is in the grinding position A, the piston 1 is in the lower middle of the brewing chamber 6; after the coffee beans are ground, the coffee powder 16A1 falls into the brewing chamber 6, completing the powder collection action;

[0054] At this time, the convex plate 12 of the U-shaped plate 10 is located in the lower part of the groove of the concave plate 13, the rack 4 and the rack drive gear 2 are in the initial position of engagement, and the convex boss 14 of the drive gear 3 does not contact other components.

[0055] 2. The brewer rotates: position A→position B, Figure 6 → Figure 7

[0056] The operator rotates the knob 9 outside the installation shell 8 to drive the drive gear 3 to rotate counterclockwise;

[0057] The drive gear 3 drives the rack drive gear 2 to rotate synchronously through the meshing intermediate gear 5;

[0058] The rack drive gear 2 meshes with the rack 4, and the rack 4 is subjected to a counterclockwise rotation torque F because the driving rack 41 of the rack 4 is eccentrically arranged relative to the piston shaft.

[0059] The rotation torque F is transmitted to the brewing end 7 through the U-shaped plate 10, and the entire brewer rotates around the rotation axis by an angle a, which is a preset design value, usually 30°-45°, adjusted according to the coffee machine model;

[0060] When the brewer rotates to the powder pressing position B, it is blocked by the limiting block inside the installation shell 8, and the brewer stops rotating, at which time the switching from the grinding position A to the powder pressing position B is completed.

[0061] 3. Powder pressing and coffee brewing: position B, Figure 7

[0062] After the brewer is limited in position B, the powder pressing rod 19B of the external powder pressing mechanism acts, extends downward into the brewing chamber 6, and compacts the coffee powder 16A1 into a coffee cake 17A2. The powder pressing pressure is usually 15-20 bar, which meets the coffee extraction standard;

[0063] After the powder pressing is completed, the water inlet pipe 18 connects the coffee machine water system to inject hot water of 90℃-95℃ into the brewing chamber 6, and the hot water completes extraction through the coffee cake 17A2. The extracted coffee liquid flows out from the liquid outlet of the brewing end 7;

[0064] After the coffee brewing is completed, the powder pressing rod 19B withdraws upward from the brewing chamber 6 to return to the initial position.

[0065] 4. Powder removal action: position B→position C, Figure 7 → Figure 8

[0066] Keep the knob 9 rotation, drive gear 3 continue to rotate counterclockwise;

[0067] Because the brewer has been limited to continue to rotate, rack drive gear 2 rotation into the rack 4 of the straight line motion;

[0068] Rack 4 drive U-shaped plate 10 synchronous upward sliding, U-shaped plate 10 drive piston 1 along the brewing chamber 6 upward movement;

[0069] Piston 1 upward push coffee cake 17A2, it from the top of the brewing chamber 6 push out, complete the powder, this time the piston 1 to the top of the brewing chamber 6, U-shaped plate 10 convex plate 12 sliding to the concave plate 13 recess in the upper limit of the stroke, corresponding Figure Six Position C.

[0070] 5. brewer reset rotation: position C→ position E graph, 8→ Figure 9 → Figure 10

[0071] After the powder, the operator reverse rotation knob 9, drive gear 3 clockwise rotation to change the driving direction, corresponding Figure 9 Position D;

[0072] Drive gear 3 through the intermediate gear 5 drive rack drive gear 2 reverse rotation;

[0073] Rack drive gear 2 and rack 4 meshing, this time the rack 4 clockwise rotation torque F and the previous rotation torque direction opposite;

[0074] The clockwise rotation torque F drive brewer around the rotation axis reverse rotation a angle, until back to the grinding position A corresponding to the position E, again by the limit block, the brewer stops rotating.

[0075] 6. piston reset: position E→ position F, Figure 11

[0076] Drive gear 3 continue to rotate clockwise, because the brewer has been limited to rotate, rack drive gear 2 rotation into the rack 4 of the straight line motion;

[0077] Rack 4 drive U-shaped plate 10 synchronous downward sliding, U-shaped plate 10 drive piston 1 along the brewing chamber 6 downward movement;

[0078] Until the piston 1 sliding to the bottom of the brewing chamber 6 corresponding Figure 11 Position F, U-shaped plate 10 convex plate 12 back to the concave plate 13 recess in the lower limit of the stroke, this time the whole work cycle, the brewer returns to the initial state, can be the next coffee production.

[0079] Key structure function description

[0080] Eccentric design of rack 4: is the core to achieve "first rotation, then linear motion", eccentric design makes rack 4 under the drive of gear to produce rotation torque, rather than directly drive piston 1 linear motion;

[0081] Drive guide column 42: when rack 4 moves, it slides along the guide groove of mounting shell 8, balances the stress of rack 4, avoids lateral deviation of rack 4 due to eccentric design, and ensures stable meshing;

[0082] Lug plate 12 and concave plate 13: limit the up and down movement stroke of U-shaped plate 10, avoid overstroke movement of piston 1, such as excessive upward movement leading to coffee cake 17 breaking, excessive downward movement leading to damage of brewing chamber 6 sealing;

[0083] Boss 14 of drive gear 3: when drive gear 3 rotates to the limit position, boss 14 contacts with the tooth surface of intermediate gear 5, blocks the continuous rotation of drive gear 3, prevents excessive rotation leading to gear tooth surface wear or fracture.

[0084] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A brewer structure of controllable rotation and piston motion sequence of an eccentric gear rack drive, comprising a brewing end (7) and a mounting shell (8), the inside of the brewing end (7) is slidingly mounted with a piston (1), characterized in that: The inside of the installation shell (8) is provided with a power structure capable of driving the piston (1) to move up and down, the piston (1) can reach the top of the brewing cavity (6) under the action of the power structure, the outside of the brewing end (7) is provided with a blocking piece (15) capable of preventing excessive rotation.

2. A brewer structure controllably sequencing rotation and piston motion according to an eccentric gear rack drive as defined in claim 1, characterized in that: The power structure comprises a U-shaped plate (10) slidably installed in the inside of the installation shell (8), one side of the U-shaped plate (10) is internally provided with a rack (4), and the inside of the installation shell (8) is installed with a rack transmission gear (2) in meshing connection with the rack (4).

3. A brewer structure controllably sequencing rotation and piston motion according to an eccentric gear rack drive as defined in claim 2, characterized in that: A rotary knob (9) is rotatably installed on the outside of the installation shell (8), the inside of the rotary knob (9) is installed with a mounting shaft, the mounting shaft penetrates and extends into the inside of the installation shell (8) and is connected with a driving gear (3), the driving gear (3) is connected with the rack transmission gear (2) through an intermediate gear (5), and one side face of the driving gear (3) away from the rotary knob (9) is connected with a driving motor in the outside.

4. A brewer structure controllably sequencing rotation and piston motion according to an eccentric gear rack drive as defined in claim 3, characterized in that: Two bosses (14) are arranged on the teeth of the driving gear (3).

5. A brewer structure controllably sequencing rotation and piston motion according to an eccentric gear rack drive as defined in claim 2, characterized in that: The U-shaped plate (10) is installed with a convex plate (12) on the surface, and the top end of the installation shell (8) is installed with a concave plate (13) matched with the convex plate (12).

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