Residue scraping mechanism of brewing core of coffee machine

Abstract

The utility model discloses a residue scraping mechanism of a brewing core of a coffee machine. The residue scraping mechanism comprises a support, an ejector head and a brewing device. A movable filter plate is arranged in the brewing device; a linkage shaft is rotatably matched on the support, a slag scraping plate is fixed on the linkage shaft, a section of linkage thread is further arranged on the linkage shaft in a protruding manner, a reset torsion spring for driving the slag scraping plate to scrape downwards is sleeved on the linkage shaft, and a linkage key for jacking up the linkage thread to enable the slag scraping plate to swing upwards is arranged on the guide sleeve or the sliding sleeve on the same side of the linkage shaft; the linkage key is block-shaped, and the linkage key advances to jack up the linkage thread, so that the slag scraping plate swings upwards and then is separated from the linkage thread; a bolt rod used for locking the slag scraping plate which swings upwards is installed on the portion, opposite to the linkage shaft, of the support, the bolt rod is sleeved with a lock catch compressed spring used for pushing the bolt rod forwards, a lower inclined face is arranged at the front end of the bolt rod, an elbow is arranged on the bolt rod in a downward protruding mode, and a shifting block used for pushing the elbow of the bolt rod backwards to unlock the slag scraping plate is arranged on the portion, opposite to the linkage shaft, of the sliding sleeve or the guide sleeve. The mechanism is large in slag scraping force, and the reset torsion spring cannot continuously hook the top.

Description

Technical Field

[0001] The utility model relates to a component of a coffee machine, in particular to a scraping mechanism of the brewing core of the coffee machine. Background Art

[0002] The brewing core of a coffee machine is a core component of the coffee machine for brewing coffee. The present application relates to a horizontal brewing core, that is, the main components of the core are all horizontally distributed and move horizontally. The specific structure and operation process of the brewing core are as follows.

[0003] The existing transversely arranged coffee machine brewing core comprises a bracket, a top, a brewer and a water inlet pipe; the bracket is fixed with a guide rod, the guide rod is slidably matched with a guide sleeve, the bracket is equipped with a lead screw driven by a motor, the lead screw is screwed with a sliding sleeve, and the guide sleeve and the sliding sleeve are respectively fixed on both sides of the top head; the brewer is fixed to the bracket, the front end of the brewer is open and the opening faces the top head, and the powder drop port is located near the opening of the brewer; a movable filter plate is arranged in the brewer, the water inlet pipe is connected with the inner cavity of the brewer, and a liquid outlet pipe is arranged in the top head; the central axis of the movable filter plate is fixed with a linkage sleeve through a connecting rod, the linkage sleeve is slidably matched with the guide rod, and the guide rod is covered with a main compression spring, and the two ends of the main compression spring are respectively against the guide sleeve and the linkage sleeve; a convex rib is arranged on the guide sleeve, and a hook for hooking the convex rib is arranged at the front section of the linkage sleeve, and a wedge block is arranged on the bracket for lifting the hook to separate the hook from the convex rib after the movable filter plate pushes the coffee grounds out of the brewer. The action process of the brewing core is as follows: in the initial state, the main compression spring pushes the linkage sleeve backward, thereby driving the movable filter plate to approach the rear end of the brewer; during brewing, coffee powder falls into the brewer from the powder drop port, and then the lead screw drives the top head through the sliding sleeve to enter the brewer opening, thereby compacting the coffee powder, and the water inlet pipe injects water into the brewer cavity to brew coffee, and the coffee liquid is discharged from the liquid outlet pipe; in the process of the top head moving forward to the brewer to compress the powder, the convex rib of the guide sleeve will hang on the hook of the linkage sleeve, and after brewing, the top head retreats and disengages During the process of leaving the brewer, the convex rib will pull the linkage sleeve, and drive the movable filter plate to retreat synchronously with the top head through the connecting rod and the central axis, and push the brewed coffee grounds out of the opening of the brewer; after the coffee grounds are pushed out of the brewer, the top head continues to drive the linkage sleeve to retreat, causing the hook of the linkage sleeve to contact the wedge block of the bracket and be lifted by the wedge block, thereby disengaging from the convex rib of the guide sleeve. In this way, the linkage sleeve and the movable filter plate will be reset under the action of the main compression spring and return to the rear end of the brewer to wait for the next brewing process.

[0004] In order to prevent coffee grounds from sticking to the movable filter plate, the prior art also specially adds a scraping mechanism to scrape the grounds on the movable filter plate. Figures 1 to 3As shown, a linkage shaft 102 can be rotatably matched on the bracket 101, a scraper plate 103 is fixed on the linkage shaft, the linkage shaft also has a 1 / 4 thread 104 protruding outward, a reset torsion spring 105 is sleeved on the linkage shaft, and a linkage bar 107 for shifting the 1 / 4 thread to rotate the linkage shaft is provided on the sliding sleeve 106; in the initial state, the linkage bar and the 1 / 4 thread are not in contact, and the scraper plate swings vertically under the action of the reset torsion spring, and the torsion spring is relaxed in this state; when brewing, the top head 108 and the sliding sleeve move toward the brewing The brewing device 109 moves forward, driving the linkage bar to move forward and lift up 1 / 4 thread, so that the scraping plate overcomes the reset torsion spring and swings upward 90 degrees to reach a horizontal state, and the linkage bar is a strip extending along the length of the linkage shaft. During the brewing process, it always lifts up 1 / 4 thread, so that the torsion spring is continuously tensioned; after brewing, when the movable filter plate pushes the slag, the top head and the linkage bar retreat, so that the front end of the linkage bar gradually disengages from the 1 / 4 thread. In this way, the linkage shaft that loses the top support of the linkage bar swings downward under the action of the reset torsion spring to scrape the slag.

[0005] The scraping mechanism of the above-mentioned prior art has the following disadvantages. First, when scraping, the linkage bar retracts the scraping plate while swinging to scrape the scraper under the drive of the reset torsion spring. The process of the linkage bar disengaging from the 1 / 4 thread is gradual, which causes the scraping action of the scraping plate to be gradual, lacking strength, often not scraping cleanly, and the scraping effect is not ideal; secondly, starting from the 1 / 4 thread when the top head moves forward, the linkage bar always supports the 1 / 4 thread, which is equivalent to the reset torsion spring being always tightened and hooked on the linkage bar and the top head during the entire brewing process, which will cause the friction resistance of the top head to be large, sliding hysteresis and scraping noise, and the smoothness and stability of the mechanism action are insufficient. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a scraping mechanism for the brewing core of a coffee machine, which has strong scraping force and the reset torsion spring will not continuously hang on the top head, thereby ensuring that the top head can move forward and backward smoothly.

[0007] The technical solution of the utility model is to provide a scraping mechanism of the brewing core of a coffee machine, which includes a bracket, a top and a brewer; the bracket is fixed with a guide rod, the guide rod is slidably matched with a guide sleeve, the bracket is equipped with a lead screw driven by a motor, the lead screw is screwed with a sliding sleeve, the guide sleeve and the sliding sleeve are respectively fixed on both sides of the top; the brewer is fixed to the bracket, and the front end opening of the brewer faces the top; a movable filter plate is arranged in the brewer; the bracket can be rotatably matched with a linkage shaft, a scraping plate is fixed on the linkage shaft, and a linkage thread is also protruded from the linkage shaft. The upper sleeve is equipped with a reset torsion spring that drives the scraper plate to scrape downward, and the guide sleeve or sliding sleeve on the same side of the linkage shaft is provided with a linkage key for lifting the linkage thread to make the scraper plate swing up; the linkage key is block-shaped, and the linkage key moves forward to lift the linkage thread so that the scraper plate swings up and then disengages from the linkage thread; a bolt rod for locking the scraper plate after it swings up is installed on the bracket on the opposite side of the linkage shaft, and a locking compression spring for pushing the bolt rod forward is sleeved on the bolt rod, a lower inclined surface is provided at the front end of the bolt rod, and an elbow protrudes under the bolt rod, and a shift block for pushing the elbow of the bolt rod backward to unlock the scraper plate is provided on the sliding sleeve or guide sleeve on the opposite side of the linkage shaft.

[0008] The above-mentioned scraping mechanism moves along with the brewing core to scrape the residue in the following manner. In the initial state, the top head does not contact the brewer, and the scraping plate is vertical under the action of the reset torsion spring; when brewing starts, the top head moves toward the brewer opening, and the linkage key moves forward with the top head, lifting the linkage thread to make the scraping plate swing up, and the scraping plate that swings up squeezes the lower inclined surface and hooks and locks with the front end of the bolt rod; thereafter, the linkage key continues to move forward and completely disengages from the linkage thread; the top head continues to move forward to press the powder for brewing; after brewing is finished, the top head pulls the movable filter plate to push the residue toward the front opening of the brewer, and when the movable filter plate just pushes the coffee residue out of the front opening of the brewer, the dial block just retreats with the top head to the position of triggering the bolt rod elbow, thereby pulling back the bolt rod to unlock the scraping plate, and the scraping plate that loses the bolt rod lock rapidly swings downward under the action of the reset torsion spring to achieve the scraping action, and the scraping plate is also reset to the initial vertical state, waiting for the next action cycle.

[0009] Compared with the prior art, the scraping mechanism of the brewing core of the coffee machine adopting the above structure has the following advantages.

[0010] Firstly, since the scraper plate has been locked by the bolt rod and then suddenly unlocked, the torque accumulated in the torsion spring is released instantly, forming a large impulse, which significantly enhances the scraping force. Compared with the prior art that scrapes down while retreating, the scraping effect of the present application is ideal, and the coffee grounds adhered to the movable filter plate can be scraped cleanly; also because the length of the linkage key is significantly shortened, from a strip to a thin block, so that the linkage key lifts the linkage thread so that the scraper plate will quickly disengage from the linkage thread after swinging up, that is, the reset torsion spring is tensioned and hooked on the bolt rod and the bracket, instead of continuously hooking the load on the top head like the prior art; therefore, it is ensured that the subsequent movements of the top head are smooth and silky, with low friction, no scratching and low noise, smoothness and stability, and effectively extending the service life of the brewing core.

[0011] The mounting structure of the bolt rod is preferably that the upper cover of the bracket is provided with a mounting seat, the mounting seat includes an upper concave cavity, and the bolt rod is accommodated in the upper concave cavity; a tongue hole is provided at the front end of the upper concave cavity, a butt plate is provided at the rear part of the upper concave cavity, and a protruding limit block is provided at the front part of the bolt rod, the part of the bolt rod located in front of the limit block is the tongue, and the lower inclined surface is located at the tongue; the tongue passes through the tongue hole and the limit block is stuck in the orifice of the tongue hole, the front end of the locking spring abuts against the limit block and the rear end abuts against the butt plate, the butt plate is provided with a notch, and the elbow of the bolt rod extends out of the butt plate through the notch; the above structure is easy to assemble and has stable performance, which can not only ensure that the tongue can smoothly retract and unlock the scraper plate when the elbow is pushed back by the shift block, but also ensure that after the shift block moves forward, the tongue is pushed forward by the locking spring and extends out of the tongue hole to lock the scraper plate.

[0012] As a further preferred embodiment, the linkage thread is a 1 / 4 thread, and the linkage key moves forward to lift the linkage thread so that the scraper plate swings up 90 degrees to a horizontal state, and the scraper plate is unlocked and scrapes down 90 degrees to a vertical state. In this way, the linkage thread is preferably a 1 / 4 thread, and its function is that the scraper plate just swings up or down 90 degrees when passing over the thread in a forward or reverse direction. The vertical shape ensures scraping, and the horizontal shape avoids space and does not interfere with the top head entering the brewer to press powder and brew. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a scraping plate of a scraping mechanism of a brewing core of a prior art coffee machine in a vertical state.

[0014] Figure 2 It is a structural schematic diagram of a scraping plate of a scraping mechanism of a brewing core of a prior art coffee machine in a horizontal state.

[0015] Figure 3 It is a structural schematic diagram of a scraping plate of a scraping mechanism of a brewing core of a prior art coffee machine.

[0016] Figure 4 It is a structural schematic diagram of a scraping mechanism of the brewing core of the coffee machine of the utility model.

[0017] Figure 5 yes Figure 4 Schematic diagram of the structure after removing the upper cover.

[0018] Figure 6 yes Figure 5 Schematic diagram of the structure after deflection at a certain angle.

[0019] Figure 7 yes Figure 6 Schematic diagram of the structure after deflection at a certain angle.

[0020] Figure 8 The utility model is a schematic structural diagram of the bolt rod of the utility model after being installed on the upper cover and viewed from a side upward direction.

[0021] Fig. 9 yes Figure 8 Schematic diagram of the explosion structure.

[0022] As shown in the figure

[0023] Existing technical parts 101, bracket, 102, linkage shaft, 103, scraper plate, 104, 1 / 4 thread, 105, reset torsion spring, 106, sliding sleeve, 107, linkage bar, 108, top head, 109, brewing device;

[0024] The utility model comprises the following parts: 1. a bracket; 1.1. an upper cover; 2. a top head; 3. a brewer; 4. a guide rod; 5. a guide sleeve; 6. a lead screw; 7. a sliding sleeve; 8. a linkage shaft; 9. a scraper plate; 10. a linkage thread; 11. a linkage key; 12. a bolt rod; 12.1. a limit block; 12.2. an elbow; 12.3. a tongue; 13. a locking spring; 14. a shifting block; 15. a mounting seat; 15.1. an upper concave cavity; 15.2. a tongue hole; 15.3. abutment plate; 15.3.1. a notch. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figures 4 to 9 As shown, the scraping mechanism of the brewing core of the coffee machine of the utility model comprises a bracket 1, a top head 2 and a brewer 3. The bracket 1 is fixed with a guide rod 4, and the guide rod 4 is slidably matched with a guide sleeve 5; the bracket 1 is equipped with a lead screw 6 driven by a motor, and the lead screw 6 is screwed with a sliding sleeve 7, and the guide sleeve 5 and the sliding sleeve 7 are respectively fixed on both sides of the top head 2. The brewer 3 is fixed to the bracket 1, and the front end of the brewer 3 is open and the front opening faces the top head 2; a movable filter plate is arranged in the brewer 3.

[0027] The upper cover 1.1 of the bracket 1 can be rotatably matched with a linkage shaft 8, on which a scraper plate 9 is fixed. The linkage shaft 8 also has a linkage thread 10 protruding outward, and a reset torsion spring 11 is sleeved on the linkage shaft 8 to drive the scraper plate 9 to swing downward to scrape the residue. The guide sleeve 5 or the sliding sleeve 7 on the same side as the linkage shaft 8 is provided with a linkage key 11 for lifting the linkage thread 10 to make the scraper plate 9 swing upward. In this embodiment, the guide sleeve 5 is on the same side as the linkage shaft 8 and the sliding sleeve 7 is located on the opposite side of the linkage shaft 8, so the linkage key 11 is located on the guide sleeve 5.

[0028] The linkage key 11 is block-shaped, and the linkage thread 10 in this embodiment is a 1 / 4 thread. Therefore, the linkage key 11 moves forward to lift the linkage thread 10 so that the scraping plate 9 swings up 90 degrees to a horizontal state, and the linkage key 11 moves forward to lift the linkage thread 10 so that the scraping plate 9 swings up to a horizontal state and then disengages from the linkage thread 10.

[0029] A bolt rod 12 is installed on the bracket 1 on the opposite side of the linkage shaft 8 for locking the scraper plate 9 after the upper swing to prevent it from scraping down in advance. The bolt rod 12 is sleeved with a lock compression spring 13 for pushing the bolt rod 12 forward to continuously lock the scraper plate 9 after the upper swing. The front end of the bolt rod 12 is provided with a lower inclined surface, and the bolt rod 12 is convex with an elbow 12.2. A shift block 14 is provided on the sliding sleeve 7 or the guide sleeve 5 on the opposite side of the linkage shaft 8 for pushing the elbow 12.2 of the bolt rod 12 backward to unlock the scraper plate 9. The scraper plate 9 that loses the lock of the bolt rod 12 rapidly scrapes down 90 degrees to a vertical state under the action of the reset torsion spring 11. In this embodiment, the sliding sleeve 7 is located on the opposite side of the linkage shaft 8, so the shift block 14 is located on the sliding sleeve 7. Of course, it can also be set in the opposite direction, with the linkage shaft 8 set on one side of the sliding sleeve 7, so that the linkage key 11 is set on the sliding sleeve 7, and the shift block 14 is set on the guide sleeve 5.

[0030] The mounting structure of the bolt rod 12 is preferably that the upper cover 1.1 of the bracket 1 is provided with a mounting seat 15, the mounting seat 15 includes an upper concave cavity 15.1, and the bolt rod 12 is accommodated in the upper concave cavity 15.1; a tongue hole 15.2 is provided at the front end of the upper concave cavity 15.1, a butt plate 15.3 is provided at the rear of the upper concave cavity 15.1, and a convex limit block 12.1 is provided at the front of the bolt rod 12, the part of the bolt rod 12 located in front of the limit block 12.1 is the tongue 12.3, and the lower inclined surface is located at the tongue 12.3; the tongue 12.3 passes through the tongue hole 15.2 and the limit block 12.1 is stuck in the orifice of the tongue hole 15.2, the front end of the lock compression spring 13 abuts the limit block 12.1 and the rear end abuts the butt plate 15.3, the butt plate 15.3 is provided with a notch 15.3.1, and the elbow 12.2 of the bolt rod 12 extends out of the butt plate 15.3 through the notch 15.3.1.

Claims

1. A scraping mechanism of the brewing core of a coffee machine, comprising a bracket, a top and a brewer; the bracket is fixed with a guide rod, the guide rod is slidably matched with a guide sleeve, the bracket is equipped with a lead screw driven by a motor, the lead screw is screwed with a sliding sleeve, the guide sleeve and the sliding sleeve are respectively fixed on both sides of the top; the brewer is fixed to the bracket, and the front end opening of the brewer faces the top; a movable filter plate is arranged in the brewer; the bracket can be rotatably matched with a linkage shaft, a scraping plate is fixed on the linkage shaft, the linkage shaft also has a section of linkage thread protruding outward, a reset torsion spring for driving the scraping plate to scrape downward is sleeved on the linkage shaft, and a linkage key for lifting the linkage thread to make the scraping plate swing is arranged on the guide sleeve or the sliding sleeve on the same side of the linkage shaft; the characteristics are: The linkage key is block-shaped, and the linkage key moves forward to lift the linkage thread so that the scraper plate can swing up and disengage from the linkage thread; a bolt rod for locking the scraper plate after it swings up is installed on the bracket on the opposite side of the linkage shaft, and a locking compression spring for pushing the bolt rod forward is sleeved on the bolt rod, a lower inclined surface is provided at the front end of the bolt rod, and an elbow protrudes under the bolt rod, and a shift block for pushing the bolt rod elbow backward to unlock the scraper plate is provided on the sliding sleeve or guide sleeve on the opposite side of the linkage shaft.

2. The scraping mechanism of the brewing core of the coffee machine according to claim 1, characterized in that: The upper cover of the bracket is provided with a mounting seat, which includes an upper concave cavity, and the bolt rod is accommodated in the upper concave cavity; a tongue hole is provided at the front end of the upper concave cavity, a butt plate is provided at the rear part of the upper concave cavity, and an outwardly protruding limit block is provided at the front part of the bolt rod, the part of the bolt rod located in front of the limit block is the tongue, and the lower inclined surface is located at the tongue; the tongue passes through the tongue hole and the limit block is stuck in the opening of the tongue hole, the front end of the lock compression spring abuts against the limit block and the rear end abuts against the butt plate, the butt plate is provided with a notch, and the elbow of the bolt rod extends out of the butt plate through the notch.

3. The scraping mechanism of the brewing core of the coffee machine according to claim 1, characterized in that: The linkage thread is a 1 / 4 thread. The linkage key is pushed forward to lift the linkage thread so that the scraper plate swings up 90 degrees to a horizontal state. After the scraper plate is unlocked, it scrapes down 90 degrees to a vertical state.

Images