Portable hand-cranking coffee machine

Abstract

The utility model discloses a portable hand-cranking coffee machine in the field of coffee machines, which comprises a main shell, the upper part and the lower part of the main shell are both of a cylindrical cavity structure, and a compression hole is formed in the center of the main shell; a first one-way valve element and a second one-way valve element are sequentially installed in the hole position, above the compression hole, of the main shell, and a third one-way valve element is installed in the hole position, below the compression hole, of the main shell. A bottom cover is connected to the main shell and located above the first one-way valve element and the second one-way valve element through screws. Pressure can be applied to coffee in the compression hole through the compression plunger, high-pressure extraction can be carried out on the coffee due to the fact that the hole diameter of the second one-way valve element is larger than that of the third one-way valve element, the gear ratio is changed through gear transmission, and the reciprocating motion frequency of the compression plunger can be increased. Therefore, the coffee extraction efficiency can be greatly improved, and the device is practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee machine field, concretely is portable espresso hand coffee machine. BACKGROUND

[0002] The production of espresso coffee needs to extract coffee under the high pressure of 9-15bar through about 90 degrees high temperature water, and the coffee obtained in this way is called espresso, and part of the oil of the coffee is also extracted, so that a layer of rich oil can be seen on the surface of the espresso. American coffee does not need high pressure environment compared with espresso.

[0003] The existing coffee extraction processing equipment is large in size, and the small portable equipment is low in efficiency when used because it is directly driven and compressed by hand. Therefore, the skilled person in the art provides a portable espresso hand coffee machine to solve the problems raised in the background art. UTILITARIAN CONTENT

[0004] The utility model aims at providing portable espresso hand coffee machine to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The portable espresso hand coffee machine comprises a main shell, the upper and lower parts of the main shell are column cavity structures, a compression hole is formed in the central part of the main shell, a first one-way valve core and a second one-way valve core are sequentially installed in the upper hole position of the compression hole on the main shell, a third one-way valve core is installed in the lower hole position of the compression hole on the main shell, a bottom cover is connected to the upper part of the first one-way valve core and the second one-way valve core on the main shell through a screw, a through hole is formed in the hole position of the first one-way valve core and the second one-way valve core on the bottom cover, a buckle cover, a secondary water distribution net and a coffee powder cup are sequentially installed in the column cavity of the bottom part of the main shell from top to bottom, a power shell is fixedly connected to the side wall of the main shell, and a gear transmission mechanism is fixedly connected to the side of the compression hole in the power shell.

[0007] As a further embodiment of this utility model: the gear transmission mechanism includes a U-shaped gear bracket fixed inside the main housing, a driven shaft rotatably mounted on the top of the gear bracket, a cam disk fixed on the top of the driven shaft, a limiting post fixed above the cam disk, a bearing interference-fitted around the limiting post, a movable part disposed around the bearing, a compression plunger disposed on one side of the movable part, an elongated hole on the movable part located around the bearing, a driven helical gear fixed at the bottom end of the driven shaft, a transmission shaft rotatably disposed on one side wall of the gear bracket, a transmission helical gear fixed at one end of the transmission shaft and meshing with the driven helical gear, a transmission gear fixed at the other end of the transmission shaft, a power shaft rotatably disposed on the gear bracket above the driven shaft, and a main gear fixed on the power shaft and meshing with the transmission gear.

[0008] As a further embodiment of this utility model: the compression plunger is movably and sealed to the compression hole, the limiting post moves inside the elongated hole through a bearing, a protective cover is fixedly connected to the end of the power housing, a hand crank is rotatably connected to the middle of the protective cover, and the hand crank is connected to the power shaft through a key.

[0009] As a further embodiment of this utility model: the top periphery of the main housing is covered with a heat-resistant sleeve, and the top of the main housing is connected to a cover by threads, and the top of the cover is integrally formed with a rope buckle.

[0010] As a further embodiment of this utility model: a dust cover is threadedly connected to the bottom of the main housing, and a bottom cover is fixedly connected to the bottom of the dust cover.

[0011] As a further embodiment of this utility model: the cover, the secondary water distribution net, and the coffee powder cup are all pressed against the lower cavity side wall of the main housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention uses a compression plunger to apply pressure to the coffee inside the compression hole. Since the orifice diameter of the second one-way valve core is larger than that of the third one-way valve core, the coffee can be extracted under high pressure. By changing the gear ratio through gear transmission, the reciprocating motion frequency of the compression plunger can be increased, thereby greatly improving the coffee extraction efficiency, making it quite practical. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0015] Fig. 2 This is an exploded view of the present invention;

[0016] Fig. 3 This is a cross-sectional view of the main shell portion of this utility model;

[0017] Fig. 4 This is a structural diagram of the gear transmission mechanism in this utility model.

[0018] In the diagram: 1. Main housing; 101. Compression hole; 2. Power housing; 3. Protective cover; 4. Hand crank; 5. Heatproof sleeve; 6. Cover; 7. Rope buckle; 8. Gear transmission mechanism; 801. Gear bracket; 802. Driven shaft; 803. Driven helical gear; 804. Transmission wheel shaft; 805. Transmission helical gear; 806. Transmission gear; 807. Main gear; 808. Power shaft; 809. Limiting post; 810. Bearing; 811. Moving part; 812. Elongated hole; 813. Compression plunger; 814. Cam plate; 9. Coffee powder cup; 10. Secondary water distribution screen; 11. Cover; 12. Coffee powder cup rotating sleeve; 13. Dust cover; 14. Bottom cover; 1401. Through hole; 15. First check valve core; 16. Second check valve core; 17. Third check valve core. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figs. 1-4 In this embodiment of the present invention, a portable Italian hand-cranked coffee machine includes a main housing 1. The upper and lower parts of the main housing 1 are cylindrical cavity structures. A compression hole 101 is provided in the center of the main housing 1. A first one-way valve core 15 and a second one-way valve core 16 are installed sequentially in the upper hole of the compression hole 101 on the main housing 1. A third one-way valve core 17 is installed in the lower hole of the compression hole 101 on the main housing 1. A bottom cover 14 is connected to the main housing 1 above the first one-way valve core 15 and the second one-way valve core 16 by screws. A through hole 1401 is provided on the bottom cover 14 at the holes of the first one-way valve core 15 and the second one-way valve core 16. A cover 11, a secondary water distribution screen 10 and a coffee powder cup 9 are installed sequentially from top to bottom in the cylindrical cavity at the bottom of the main housing 1. A power housing 2 is fixedly connected to one side wall of the main housing 1. A gear transmission mechanism 8 is fixedly connected inside the power housing 2 on one side of the compression hole 101.

[0021] The gear transmission mechanism 8 includes a U-shaped gear bracket 801 fixed inside the main housing 1, a driven shaft 802 rotatably mounted on the top of the gear bracket 801, a cam disk 814 fixed on the top of the driven shaft 802, a limiting post 809 fixed above the cam disk 814, a bearing 810 interference-fitted around the limiting post 809, a movable part 811 disposed around the bearing 810, a compression plunger 813 disposed on one side of the movable part 811, and a component located on the movable part 811 around the bearing 810. The gears include: an elongated hole 812; a driven helical gear 803 fixed at the bottom of the driven shaft 802; a transmission shaft 804 rotatably mounted on one side wall of the gear bracket 801; a transmission helical gear 805 fixed at one end of the transmission shaft 804 and meshing with the driven helical gear 803; a transmission gear 806 fixed at the other end of the transmission shaft 804; a power shaft 808 rotatably mounted on the gear bracket 801 above the driven shaft 802; and a main gear 807 fixed on the power shaft 808 and meshing with the transmission gear 806.

[0022] By adopting the above technical solution, the power shaft 808 can be rotated by the hand crank 4. The rotation of the power shaft 808, under the transmission of the main gear 807, transmission gear 806, transmission helical gear 805, and driven helical gear 803, can drive the cam disk 814 to rotate. The limiting post 809 above the cam disk 814 performs circular motion. The limiting post 809 moves inside the elongated hole 812, and through the movable part 811, it can drive the compression plunger 813 to reciprocate inside the compression hole 101. When the compression plunger 813 moves away from the compression hole 101, the first one-way valve core 15 opens, and the second one-way valve core 16 and the third one-way valve core... When the one-way valve core 17 is closed, the coffee material flows into the compression hole 101 after passing through the first one-way valve core 15. When the compression plunger 813 moves towards the bottom of the compression hole 101, the first one-way valve core 15 closes, while the second one-way valve core 16 and the third one-way valve core 17 open. The compression plunger 813 can apply pressure to the coffee inside the compression hole 101. Since the orifice diameter of the second one-way valve core 16 is larger than that of the third one-way valve core 17, high-pressure extraction of coffee can be performed. By changing the gear ratio through gear transmission, the reciprocating frequency of the compression plunger 813 can be increased, thereby greatly improving the coffee extraction efficiency, which is quite practical.

[0023] Among them, the compression plunger 813 is movably and sealed to the compression hole 101, the limiting post 809 moves inside the elongated hole 812 through the bearing 810, the end of the power housing 2 is fixedly connected to the cover 3, the middle of the cover 3 is rotatably connected to the hand crank 4, and the hand crank 4 is connected to the power shaft 808 through a key.

[0024] The main housing 1 is covered with a heat-resistant sleeve 5 on its top periphery, and a cover 6 is connected to the top of the main housing 1 by threads. A rope buckle 7 is integrally formed on the top of the cover 6.

[0025] The bottom of the main housing 1 is connected to a dust cover 13 by a thread, and the bottom of the dust cover 13 is fixedly connected to a bottom cover 14.

[0026] The lid 11, the secondary water distribution net 10, and the coffee powder cup 9 are all pressed against the lower cavity side wall of the main housing 1. The secondary water distribution net 10 can achieve secondary filtration of coffee.

[0027] The working principle of this utility model is as follows: During use, the coffee to be extracted and hot water are added to the cavity at the top of the main housing 1. Then, the power shaft 808 is rotated by the hand crank 4. The rotation of the power shaft 808, driven by the main gear 807, transmission gear 806, transmission helical gear 805, and driven helical gear 803, drives the cam disk 814 to rotate. The limiting post 809 above the cam disk 814 performs a circular motion. The limiting post 809 moves inside the elongated hole 812, and through the movable part 811, it drives the compression plunger 813 to reciprocate inside the compression hole 101. When the compression plunger 813 moves away from the compression hole 101, the first one-way valve core 15 opens, and the second one-way valve core 16 and the third one-way valve core 15 open. When the one-way valve core 17 is closed, the coffee powder flows into the compression hole 101 after passing through the first one-way valve core 15. When the compression plunger 813 moves towards the bottom of the compression hole 101, the first one-way valve core 15 closes, and the second one-way valve core 16 and the third one-way valve core 17 open. The compression plunger 813 can apply pressure to the coffee inside the compression hole 101. Since the orifice diameter of the second one-way valve core 16 is larger than that of the third one-way valve core 17, the coffee can be extracted under high pressure. By changing the gear ratio through gear transmission, the reciprocating frequency of the compression plunger 813 can be increased, thereby greatly improving the coffee extraction efficiency. After extraction, the coffee is filtered through the secondary water separator 10 and temporarily stored in the coffee powder cup 9, thus realizing the extraction of coffee.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A portable espresso machine, comprising a main housing (1), characterized in that: The main housing (1) has a cylindrical cavity structure at both the top and bottom. A compression hole (101) is provided at the center of the main housing (1). A first one-way valve core (15) and a second one-way valve core (16) are sequentially installed in the hole above the compression hole (101) on the main housing (1). A third one-way valve core (17) is installed in the hole below the compression hole (101) on the main housing (1). The main housing (1) is connected to a bottom cover (14) by screws. The bottom cover (14) has through holes (1401) at the holes of the first one-way valve core (15) and the second one-way valve core (16). The main housing (1) is installed with a cover (11), a secondary water distribution screen (10) and a coffee powder cup (9) in the cylindrical cavity at the bottom from top to bottom. The main housing (1) is fixedly connected to a power housing (2) on one side wall. The power housing (2) is fixedly connected to a gear transmission mechanism (8) on one side of the compression hole (101).

2. The portable espresso machine according to claim 1, characterized in that: The gear transmission mechanism (8) includes a U-shaped gear bracket (801) fixed inside the main housing (1), a driven shaft (802) rotatably mounted on the top of the gear bracket (801), a cam disk (814) fixed on the top of the driven shaft (802), a limiting post (809) fixed above the cam disk (814), a bearing (810) interference-fitted around the limiting post (809), a movable part (811) disposed around the bearing (810), a compression plunger (813) disposed on one side of the movable part (811), and a part located on the movable part (811) around the bearing (810). The gear includes an elongated hole (812), a driven helical gear (803) fixed at the bottom of the driven shaft (802), a transmission shaft (804) rotatably mounted on one side wall of the gear bracket (801), a transmission helical gear (805) fixed at one end of the transmission shaft (804) and meshing with the driven helical gear (803), a transmission gear (806) fixed at the other end of the transmission shaft (804), a power shaft (808) rotatably mounted on the gear bracket (801) above the driven shaft (802), and a main gear (807) fixed on the power shaft (808) and meshing with the transmission gear (806).

3. The portable espresso machine according to claim 2, characterized in that: The compression plunger (813) is movably and sealed to the compression hole (101), the limiting post (809) moves inside the elongated hole (812) through the bearing (810), the end of the power housing (2) is fixedly connected to the cover (3), the middle of the cover (3) is rotatably connected to the hand crank (4), and the hand crank (4) is connected to the power shaft (808) through a key.

4. The portable espresso machine according to claim 1, characterized in that: The top periphery of the main housing (1) is covered with a heat-resistant sleeve (5), and the top of the main housing (1) is connected to a cover (6) by a thread, and the top of the cover (6) is integrally formed with a rope buckle (7).

5. The portable espresso machine according to claim 1, characterized in that: The bottom of the main housing (1) is connected to a dust cover (13) by a thread, and the bottom of the dust cover (13) is fixedly connected to a bottom cover (14).

6. The portable espresso machine according to claim 1, characterized in that: The cover (11), secondary water distribution net (10) and coffee powder cup (9) are all pressed against the lower cavity side wall of the main housing (1).

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