Hydraulic locking drive mechanism for coffee machine extraction

Abstract

The present application relates to a kind of hydraulic locking drive mechanism for coffee machine extraction, including shell, be equipped with grinder on shell, brewing device and drive device, the drive device includes drive motor and reduction gearbox, the output end of reduction gearbox is connected with the lower tooth disc of brewing device shaft, brewing device side is equipped with the locking seat connected with shell, the lower end of locking seat is equipped with the upper rack of meshing with lower tooth disc, locking seat is equipped with hydraulic locking assembly in, locking seat both sides are equipped with the positioning column of drive brewing device rotation, when, when drive device is driven by the meshing transmission of lower tooth disc and lower rack, drive brewing device to specified position, start hydraulic locking assembly and lock brewing device, so replace the locking of motor screw rod, realize the technical performance of good locking, reduce the requirement to gear, simultaneously, using hydraulic locking, can control engagement force, avoid when encountering reverse force is particularly big, appear gear tooth, misplacement or tooth break situation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee machines, in particular to a hydraulic locking driving mechanism for coffee machine extraction. BACKGROUND

[0002] At present, the coffee extraction device is a device for extracting coffee. The basic principle is to put the ground coffee powder into the coffee extraction device to press it into a powder cake, and then pass high-temperature and high-pressure water through the powder cake to extract the relevant substances in the coffee powder together with the hot water to form coffee, which is discharged to a drinking container. The extracted coffee powder cake is discharged. The existing extraction device has a movable part and a capsule that can move along the longitudinal axis direction, and the movable part is moved by the operating lever, and in this movement, the movable part makes the capsule enter its housing, and the capsule axis is lowered towards the axis of the movable part. The result is that the collar of the capsule passes below the stop device. Then hot water is supplied through the pipe in the movable part, and the water flows through the capsule to achieve coffee extraction. This type of structure is achieved by reciprocating movement of the capsule in the axial direction, and combined with water flow to achieve the purpose of coffee extraction. Since the extraction device has a movable part that can move along the longitudinal axis, the capsule needs to be locked by a driving device, but the current conventional way is to use motor screw or motor worm locking. The locking of the motor screw has high technical performance requirements for the screw, and the locking of the motor worm is not easy to control the engagement force, and in the case of encountering a particularly large reverse force, even the gear teeth, misalignment or tooth breakage may occur. SUMMARY

[0003] The purpose of the present application is to provide a hydraulic locking driving mechanism for coffee machine extraction, which replaces the locking of the motor screw, realizes good locking technical performance, reduces the requirements for the gear, and at the same time uses hydraulic locking to control the engagement force, avoiding the occurrence of gear teeth, misalignment or tooth breakage when encountering a particularly large reverse force.

[0004] In order to solve the above technical problems, the present application solves the problems by the following technical scheme:

[0005] A hydraulic locking driving mechanism for coffee machine extraction, comprising a housing, a bean grinding device, a brewing device and a driving device are arranged on the housing, the driving device comprises a driving motor and a reduction box, the output end of the reduction box is connected with a lower tooth disc which is connected with the brewing device, one side of the brewing device is provided with a locking seat connected with the housing, the lower end of the locking seat is provided with an upper rack which is engaged with the lower tooth disc, the locking seat is provided with a hydraulic locking assembly, and the two sides of the locking seat are provided with positioning columns for driving the brewing device to rotate.

[0006] Preferably, the lower tooth disc comprises a main gear engaged with the output gear of the reduction box and a secondary gear engaged with the upper rack.

[0007] Further preferably, the upper rack is in a circular arc structure.

[0008] Further preferably, the locking seat is provided with positioning holes on both sides, the positioning column is arranged in the positioning hole, a return spring is arranged between the positioning hole and the positioning column, the upper end of the positioning hole is connected through a nut, and the lower end of the positioning column extends out of the positioning hole.

[0009] Further preferably, the hydraulic locking assembly comprises a piston cavity arranged in the locking seat, a piston sleeve and a piston body arranged in the piston cavity, a sealing ring arranged between the piston sleeve and the piston body, and a water injection assembly arranged between the piston support and the piston body.

[0010] Further preferably, the water injection assembly comprises a through hole arranged in the middle of the piston support and a water injection hole arranged eccentrically on the piston body.

[0011] Further preferably, the upper end of the piston body corresponding to the water injection hole is connected with a water injection piece, and the middle of the water injection piece is provided with a U-shaped groove communicated with the water injection hole.

[0012] Further preferably, the output end of the driving device is connected with a powder containing cylinder, the upper part of the powder containing cylinder is provided with a powder filling channel facilitating the coffee powder in the cylinder to fall into the powder containing cylinder, one end of the powder containing cylinder is provided with an extraction assembly facilitating the cooperation of the powder containing cylinder, the other end of the powder containing cylinder is connected with a water inlet blocking piece, and the lower tooth disc is connected with the powder containing cylinder.

[0013] The present application has the following advantages: the shell is provided with a bean grinding device, a brewing device and a driving device, the driving device comprises a driving motor and a speed reducer, the output end of the speed reducer is connected with a lower tooth disc axially connected with the brewing device, one side of the brewing device is provided with a locking seat connected with the shell, the lower end of the locking seat is provided with an upper rack matched with the lower tooth disc, the locking seat is provided with a hydraulic locking assembly, and the two sides of the locking seat are provided with positioning columns driving the brewing device to rotate, when the driving device is driven to the specified position through the meshing of the lower tooth disc and the lower rack, the hydraulic locking assembly is started to lock the brewing device, so that the locking of the motor screw is replaced, the technical performance of good locking is realized, the requirement for the gear is reduced, the meshing force can be controlled by using the hydraulic locking, and the conditions of tooth punching, misplacement or tooth breaking can be avoided when the reverse force is particularly large. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application.

[0015] Figure 2 is an exploded structural schematic diagram of the hidden shell of the present application.

[0016] Figure 3 is another angle exploded structural schematic diagram of the hidden shell of the present application.

[0017] Figure 4 This is a cross-sectional view of the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-4 As shown, a hydraulic locking drive mechanism for coffee extraction includes a housing 1, on which a grinding device 2, a brewing device 3, and a drive device 4 are mounted. The drive device 4 includes a drive motor 5 and a reduction gearbox 6. The output end of the reduction gearbox 6 is connected to a lower gear plate 7 that is axially connected to the brewing device 3. A locking seat 8 connected to the housing 1 is provided on one side of the brewing device 3. An upper rack 9 that meshes with the lower gear plate 7 is provided at the lower end of the locking seat 8. A hydraulic locking assembly is provided inside the locking seat 8. Positioning pins 10 that drive the brewing device 3 to rotate are provided on both sides of the locking seat 8. In use, when the drive device 4 drives the brewing device 3 to a designated position through the meshing of the lower gear plate 7 and the lower rack, the hydraulic locking assembly is activated to lock the brewing device 3. This replaces the locking of the motor screw, achieving good locking performance and reducing the requirements for gears. At the same time, the hydraulic locking can control the meshing force and avoid the occurrence of tooth breakage, misalignment, or tooth breakage when encountering particularly large reverse forces.

[0020] In this embodiment, the lower gear 7 includes a main gear 71 that meshes with the output teeth of the reduction gearbox 6 and a secondary gear 72 that meshes with the upper rack 9. The upper rack 9 has an arc-shaped structure, and the secondary gear 72 and the upper rack 9 are meshed by multiple teeth. The upper rack 9 has an arc-shaped shape and multiple teeth are arranged along the arc direction to improve the stability of the meshing transmission.

[0021] In this embodiment, positioning holes are provided on both sides of the locking seat 8, and the positioning pin 10 is disposed in the positioning hole. A return spring 11 is provided between the positioning hole and the positioning pin 10. The upper end of the positioning hole is connected by a nut, and the lower end of the positioning pin 10 extends out of the positioning hole. The hydraulic locking assembly includes a piston chamber opened in the locking seat 8, a piston sleeve 12 and a piston body 13 are provided in the piston chamber, and a sealing ring 14 is provided between the piston sleeve 12 and the piston body 13. The locking seat 8 is provided with a piston support 15, and a water injection assembly is provided between the piston support 15 and the piston body 13. The water injection assembly includes a piston support 15 opened in the piston support 15. The frame 15 has a through hole 16 in the middle and a water injection hole 17 eccentrically opened on the piston body 13. The upper end of the piston body 13 corresponding to the water injection hole 17 is connected to a water injection plate 18. The water injection plate 18 has a U-shaped groove 19 in the middle that communicates with the water injection hole 17. When in use, water is first injected into the piston cavity through the water injection hole 17, thereby generating pressure on the piston body 13. As the water injection pressure increases, the upper rack 9 presses down on the lower gear plate 7, and the two mesh to produce a locking effect. When it is necessary to release the pressure, the return spring 11 sleeved on the strong column moves back and forth to knock out the water in the piston cavity and release the pressure relief effect.

[0022] In the embodiment, the output end of the driving device 4 is connected with a powder containing cylinder 31, the upper part of the powder containing cylinder 31 is provided with a powder filling channel facilitating the coffee powder in the cylinder to fall into the powder containing cylinder 31, one end of the powder containing cylinder 31 is provided with an extraction assembly 33 facilitating the powder containing cylinder 31 to be sleeved, the other end of the powder containing cylinder 31 is connected with a water inlet blocking piece 32, the lower tooth disc 7 is connected with the powder containing cylinder 31, the meshing rotation of the upper tooth bar 9 and the lower tooth disc 7 makes the powder containing cylinder 31 rotate and lock, the driving device 4 drives the powder containing cylinder 31 to rotate to the lower part corresponding to the lower end of the powder filling channel and lock, after the coffee powder in the cylinder falls into the powder containing cylinder 31, the driving device 4 continues to drive the powder containing cylinder 31 to rotate to the extraction assembly 33 and lock, and the extraction assembly 33 is sealed and connected, then water is pumped into the extraction assembly 33 through the water inlet blocking piece to realize extraction, after the extraction is finished, the driving device 4 drives the powder containing cylinder 31 to reverse to the lower part of the powder filling channel, facilitating the excess coffee powder in the powder filling channel to fall, and the powder containing cylinder 31 is continuously reversed to push out the residual coffee powder in the powder containing cylinder 31 through the water inlet blocking piece.

[0023] According to the idea of the present application, there will be changes in the specific implementation and application range, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A hydraulic locking drive mechanism for extraction of a coffee machine, comprising a housing, on which a grinding device, a brewing device and a drive device are arranged, characterized in that: The driving device comprises a driving motor and a reduction box, the output end of the reduction box is connected with a lower gear disc which is connected with the brewing device, one side of the brewing device is provided with a locking seat which is connected with the shell, the lower end of the locking seat is provided with an upper rack which is engaged with the lower gear disc, the locking seat is provided with a hydraulic locking assembly, and the locking seat is provided with positioning columns which drive the brewing device to rotate on both sides; Both sides of the locking seat are provided with positioning holes, the positioning columns are arranged in the positioning holes, return springs are arranged between the positioning holes and the positioning columns, the upper end of the positioning hole is connected through a nut, and the lower end of the positioning column extends out of the positioning hole; The hydraulic locking assembly comprises a piston cavity which is arranged in the locking seat, a piston sleeve and a piston body which are arranged in the piston cavity, a sealing ring which is arranged between the piston sleeve and the piston body, a piston support which is arranged in the locking seat, and a water injection assembly which is arranged between the piston support and the piston body. The water injection assembly comprises a through hole which is arranged in the middle of the piston support and a water injection hole which is eccentrically arranged on the piston body.

2. A hydraulic locking drive mechanism for extraction in a coffee machine according to claim 1, characterized in that: The lower gear disc comprises a main gear which is engaged with the output gear of the reduction box and a secondary gear which is engaged with the upper rack.

3. A hydraulic locking drive mechanism for coffee machine extraction according to claim 1, characterized in that: The upper rack is in a circular arc structure.

4. A hydraulic locking drive mechanism for coffee machine extraction according to claim 1, characterized in that: The upper end of the piston body is connected with a water injection piece corresponding to the water injection hole, and the middle of the water injection piece is provided with a U-shaped groove which is communicated with the water injection hole.

5. A hydraulic locking drive mechanism for coffee machine extraction according to claim 1, characterized in that: The output end of the driving device is connected with a powder containing cylinder, the upper end of the powder containing cylinder is provided with a powder filling channel which facilitates the coffee powder in the cylinder to fall into the powder containing cylinder, one end of the powder containing cylinder is provided with an extraction assembly which facilitates the powder containing cylinder to be connected, the other end of the powder containing cylinder is connected with a water inlet blocking piece, and the lower gear disc is connected with the powder containing cylinder.

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