Coffee machine

Abstract

The coffee machine comprises a machine base (1), a powder bin unit (2) and a powder pushing unit (5), the powder bin unit (2) comprises a powder bin (21) and a first driving mechanism (22), the coffee machine is characterized in that the powder pushing unit (5) comprises a push rod (52), the push rod (52) extends in the axial direction of the powder bin (21), the head of the push rod penetrates into the powder bin (21), and the push rod (52) is configured to do reciprocating motion in the axial direction of the powder bin (21); the push plate (53) is positioned in the powder bin (21) and is mounted at the head part of the push rod (52); the sliding block (54) is rotatably mounted at the tail part of the push rod (52); the sliding groove seat (51) is fixed relative to the machine seat (1) and provided with a sliding groove (511) used for limiting the sliding block (54) to slide in the sliding groove seat (51). Compared with the prior art, the powder pushing unit of the coffee machine is simple in structure.

Description

Technical Field

[0001] The invention relates to the technical field of beverage brewing equipment, in particular to a coffee machine. Background Art

[0002] As the relevant technologies of household appliances and coffee machines become more and more perfect, coffee machines can not only automatically perform operations such as grinding, filling, pressing, brewing, and removing residues, realizing automated control of the entire coffee brewing process and simplifying user operations, but also the taste of the brewed coffee is getting better and better.

[0003] For example, the Chinese patent application number CN201910115400.X, "A brewing seat assembly and a coffee machine having the brewing seat assembly", discloses a coffee machine. When working, a brewing cup filled with coffee powder is first loaded into the brewing cup holder located in the initial position, and then a driving device drives the brewing cup holder to swing to a position facing the brewing plug. Then the brewing plug is pressed down into the brewing cup to brew the coffee. After brewing, the brewing plug returns to its original position, and the push plate in the brewing cup moves upward to push out the residue. Finally, the driving device drives the brewing cup holder to swing to the initial position.

[0004] However, in the above solution, a transmission device is provided on the push plate for pushing the push plate to move up and down along the brewing cup. The driving device can drive the transmission device to drive the push plate to move up and down. The transmission device is a planetary gear, so the structure of the powder pushing unit is complicated. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a coffee machine with a simple powder pushing unit structure in view of the current status of the prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a coffee machine, comprising a machine base, a powder bin unit and a powder pushing unit installed on the machine base, the powder bin unit comprising a powder bin with an opening at the top and a first driving mechanism for driving the powder bin to swing, the powder bin having at least an extraction position and a powder removal position during the swinging process, characterized in that: the powder pushing unit comprises

[0007] A push rod, extending along the axial direction of the powder bin and having a head portion thereof penetrating into the powder bin, and configured to be capable of reciprocating along the axial direction of the powder bin;

[0008] A push plate, located in the powder bin and mounted on the head of the push rod;

[0009] A slider rotatably mounted on the rear end of the push rod; and

[0010] A slide seat is fixed relative to the machine base and is provided with a slide slot for limiting the sliding movement of the slider therein, the slide slot comprising a second sliding section having a first end and a second end; and when the powder bin is in the extraction position, the slider is located at the first end of the second sliding section, and when the powder bin is in the powder removal position, the slider is located at the second end of the second sliding section; and is further configured as follows:

[0011] During the process of the powder bin swinging from the extraction position to the powder removal position, the slider slides from the first end to the second end of the second sliding section, thereby driving the push rod to move with the push plate along the axial direction of the powder bin toward the opening, thereby causing the powder cake to gradually separate from the powder bin.

[0012] In order to drive the push rod to move during the sliding movement of the slider in the second sliding section, the second sliding section gradually approaches the rotation axis of the powder bin from the first end to the second end.

[0013] In order to facilitate the smoothness of the movement of the slider, the second sliding section is arc-shaped. Of course, the second sliding section can also be set to a straight line, but this will cause the slider to move less smoothly.

[0014] In order to ensure that the push plate remains stationary during the swinging process of the powder bin from the powder receiving position to the extraction position, the powder bin also has a powder receiving position during the swinging process, and the extraction position is located between the powder receiving position and the powder removing position;

[0015] The slide groove further includes a first sliding section having a first end and a second end, the first end of the second sliding section is connected to the second end of the first sliding section; and when the powder bin is in a powder receiving position, the sliding block is located at the first end of the first sliding section, and when the powder bin is in an extraction position, the sliding block is located at the second end of the first sliding section; and is further configured as follows:

[0016] During the process of the powder bin swinging from the powder receiving position to the extraction position, the sliding block slides from the first end to the second end of the first sliding section, and the push plate remains stationary relative to the powder bin.

[0017] In order to keep the push rod stationary during the sliding of the slider in the first sliding section, the first sliding section is in an arc shape, and the center of the first sliding section coincides with the rotation axis of the powder bin.

[0018] In order to share the force of the slider on the push rod and avoid its breakage, the bottom of the powder bin has a fixed cylinder for the push rod to pass through, and the tail of the push rod has a movable cylinder that is socketed with the fixed cylinder. The slider is rotatably mounted on the outer peripheral wall of the movable cylinder.

[0019] In order to prevent the slider from contacting the inner wall of the slide groove close to the powder bin during the swinging of the powder bin and affecting the smoothness of the swinging of the powder bin, the powder pushing unit also includes an elastic member, which acts between the fixed cylinder and the movable cylinder so that the slider always has a tendency to abut against the inner wall of the slide groove away from the powder bin.

[0020] In order to realize automatic powder pressing and extraction, an extraction unit is installed on the machine base, and the extraction unit includes

[0021] A piston assembly facing the opening of the powder bin at the extraction position; and

[0022] A second driving mechanism is used to drive the piston assembly to translate along its axial direction between a yield position and a powder pressing position;

[0023] In the extraction state, the powder bin is in the extraction position, the piston assembly is in the powder pressing position, and an extraction chamber is formed between the powder bin and the piston assembly. The piston assembly and the push rod are both sealed with the powder bin.

[0024] In order to give the push rod a certain amount of moving space when the piston assembly retreats and facilitate pressure relief, a notch is provided on the inner side wall of the slide groove located at the first end of the second sliding section close to the powder bin;

[0025] When the piston assembly just leaves the extraction state, the piston assembly is always sealed with the powder bin, so that the push rod moves axially toward the opening of the powder bin under the action of negative pressure, thereby releasing the seal between the push rod and the powder bin and driving the slider to move from the first end of the second sliding section to the notch.

[0026] In order to accurately implement the alternating intermittent motion of the powder bin and the piston assembly, the first drive mechanism and the second drive mechanism are the same drive mechanism, which includes

[0027] A toothed disc having incomplete teeth on the outer peripheral wall;

[0028] A sector gear connected to the side of the powder bin and capable of meshing with the incomplete teeth;

[0029] A connecting rod, the first end of which is hinged on the machine base, and the second end of which has an arc-shaped limiting groove;

[0030] A crank, the first end of which is hinged at the center of the toothed disc, the second end of which has a rotating wheel slidably inserted into the limiting groove, and the distance from the first end to the second end of the crank is consistent with the radius of the limiting groove;

[0031] a transmission assembly, acting between the first end of the connecting rod and the piston assembly, for converting the rotational motion of the connecting rod into the translational motion of the piston assembly; and

[0032] A driving structure, used for driving the gear disc to rotate around its own axis;

[0033] When the sector gear is meshed with the incomplete teeth, the center of the limiting groove coincides with the rotation axis of the toothed disc;

[0034] When the center of the limiting groove deviates from the rotation axis of the toothed disc, the sector gear and the incomplete teeth are not meshed.

[0035] Compared with the prior art, the advantages of the present invention are: a powder pushing unit is composed of a slide seat with a slide groove, a push rod, a push rod and a slider; in the process of the powder bin swinging from the extraction position to the powder removal position, the slider slides from the first end of the second sliding section of the slide groove to the second end, and the push plate is driven by the push rod to move along the axial direction of the powder bin toward the opening, so that the powder cake gradually separates from the powder bin, and the powder pushing function can be realized without introducing a new driving source and the powder pushing unit has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a front view of the coffee machine of Example 1 of the present invention in a powder receiving state (the support plate at the front side is omitted);

[0037] Figure 2 for Figure 1 A magnified view of the extraction unit;

[0038] Figure 3 is a longitudinal cross-sectional view of the coffee machine of Embodiment 1 of the present invention in a powder receiving state;

[0039] Figure 4 is a longitudinal cross-sectional view of the embodiment 1 of the coffee machine of the present invention in the extraction preparation state;

[0040] Figure 5 It is a rear view of the embodiment 1 of the coffee machine of the present invention in the pre-pressed state;

[0041] Figure 6 is a longitudinal cross-sectional view of the embodiment 1 of the coffee machine of the present invention in a pre-pressed state;

[0042] Figure 7 is a longitudinal cross-sectional view of the embodiment 1 of the coffee machine of the present invention in the extraction state;

[0043] Figure 8 is a longitudinal cross-sectional view of the embodiment 1 of the coffee machine of the present invention in a pressure relief state;

[0044] Fig. 9 It is a longitudinal cross-sectional view of the embodiment 1 of the coffee machine of the present invention in the powder removal state;

[0045] Fig.10It is a front view of the driving mechanism in the second embodiment of the coffee machine of the present invention;

[0046] Fig.11 It is a rear view of the driving mechanism in the second embodiment of the coffee machine of the present invention;

[0047] Fig.12 It is a front view of the extraction unit in the second embodiment of the coffee machine of the present invention;

[0048] Fig.13 FIG. 2 is a partial cross-sectional view of the coffee machine of Embodiment 2 of the present invention in a powder receiving state (viewed from the back to the front);

[0049] Fig.14 A partial cross-sectional view of the coffee machine of Embodiment 2 of the present invention in the extraction preparation state (viewed from the back to the front);

[0050] Fig.15 FIG. 2 is a partial cross-sectional view of the coffee machine of Embodiment 2 of the present invention in a pre-pressed state (viewed from the back to the front);

[0051] Fig.16 It is a partial cross-sectional view (from the back to the front) of the embodiment 2 of the coffee machine of the present invention in the powder removal preparation state;

[0052] Fig.17 It is a partial cross-sectional view of the embodiment 2 of the coffee machine of the present invention in the powder removal state (viewed from the back to the front). DETAILED DESCRIPTION

[0053] The present invention is further described in detail below with reference to the accompanying drawings.

[0054] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0055] Embodiment 1:

[0056] like Figures 1 to 9 The first preferred embodiment of the coffee machine of the present invention is shown in FIG.

[0057] The base 1 includes two supporting plates 11 which are arranged side by side, one in front of the other and connected to each other.

[0058] The powder bin unit 2 includes a powder bin 21 and a first driving mechanism 22 .

[0059] Specifically, the front and rear sides of the powder bin 21 are rotatably connected to the corresponding support plate 11 through a rotating shaft extending in the front-to-back direction; the top of the powder bin 21 has an opening 211; the bottom of the powder bin 21 has a fixed cylinder 212 arranged coaxially with the powder bin 21, and a sealing ring 213 is installed at the inner shoulder of the upper inner part of the fixed cylinder 212; the eccentric position of the bottom of the powder bin 21 is connected to a water inlet joint 214;

[0060] The first driving mechanism 22 is used to drive the powder bin 21 to swing back and forth between the powder receiving position, the extraction position and the powder removing position, and the extraction position is located between the powder receiving position and the powder removing position. In this embodiment, the first driving mechanism 22 is a worm gear reducer, which is a conventional structure and will not be described here.

[0061] The powder feeding unit 3 is used to supply coffee powder to the powder bin 21 at the powder receiving position, and includes a bean grinding device 31 and a powder outlet pipe 32 .

[0062] Specifically, the bean grinding device 31 is used to grind coffee beans into coffee powder, and has a bean inlet and a powder outlet at the top and bottom respectively;

[0063] The top inlet of the powder outlet pipe 32 is connected to the above-mentioned powder outlet, and the bottom outlet of the powder outlet pipe 32 is directly opposite to the opening 211 of the powder bin 21 at the powder receiving position.

[0064] The extraction unit 4 is used to compress the coffee powder in the powder bin 21 at the extraction position into a powder cake and perform extraction, and includes a piston assembly 41 and a second driving mechanism 42 .

[0065] Specifically, the piston assembly 41 is directly opposite to the opening 211 of the powder bin 21 located at the extraction position, is coaxially arranged with the powder bin 21, and can be installed between the two support plates 11 in an axially slidable manner along the powder bin 21; in this embodiment, the piston assembly 41 includes a water outlet seat 411, a piston 412 movably installed in the water outlet seat 411, and a return spring 413 connected between the water outlet seat 411 and the piston 412;

[0066] The second driving mechanism 42 is used to drive the water outlet seat 411 of the piston assembly 41 to translate along its axial direction between the yield position and the powder pressing position; in this embodiment, the second driving mechanism 42 is a two-connecting rod driving structure, which is a conventional structure and will not be repeated here.

[0067] The powder pushing unit 5 is used to push the powder cake in the powder bin 21 at the extraction position away from the powder bin 21 , and includes a slide seat 51 , a push rod 52 , a push plate 53 , a slider 54 and an elastic member 55 .

[0068] Specifically, the slide slot seat 51 is in the shape of a plate, and there are two of them, which are arranged side by side, one in front and one in the back, and fixed relative to the machine base 1. A slide slot 511 is arranged on the surface of each slide slot seat 51. The slide slot 511 includes a first sliding section 5111 having a first end (i.e., the bottom end) and a second end (i.e., the top end) and a second sliding section 5112 having a first end (i.e., the bottom end) and a second end (i.e., the top end). The bottom end of the second sliding section 5112 is connected to the top end of the first sliding section 5111. The first sliding section 5111 extends along the circumferential direction of the rotation axis of the powder bin 21 and is in an arc shape, and its center coincides with the rotation axis of the powder bin 21. The second sliding section 5112 is in an arc shape, gradually approaching the rotation axis of the powder bin 21 from the bottom to the top. The chute 511 is located at the connection between the first sliding section 5111 and the second sliding section 5112, and a notch 5113 is provided on the inner side wall near the powder bin 21. In this embodiment, the chute seat 51 and the support plate 11 of the machine base 1 are integrated.

[0069] The push rod 52 extends along the axial direction of the powder bin 21 and its head penetrates into the powder bin 21 and can be movably arranged in the fixed cylinder 212 along the axial direction; the tail of the push rod 52 has a movable cylinder 521 coaxially arranged with the fixed cylinder 212, and the movable cylinder 521 can be movably sleeved on the outer periphery of the fixed cylinder 212 along the axial direction; the head of the push rod 52 has an enlarged diameter section and a constant diameter section arranged in sequence from bottom to top;

[0070] The push plate 53 is mounted on the head of the push rod 52 and is located in the powder bin 21;

[0071] There are two sliders 54, which correspond to the above-mentioned slide groove seats 51 one by one, and are rotatably mounted on the front and rear sides of the outer peripheral wall of the movable cylinder 521, and can be slidably inserted into the slide groove 511 of the corresponding slide groove seat 51;

[0072] The elastic member 55 is a compression spring, and its two ends are respectively in contact with the inner shoulder at the bottom of the fixed cylinder 212 and the limit block inside the movable cylinder 521, so that the slider 54 always has a tendency to contact the inner side wall of the slide groove 511 away from the powder bin 21;

[0073] When the powder bin 21 is in the powder receiving position, the slider 54 is located at the bottom of the first sliding section 5111, and when the powder bin 21 is in the extraction position, the slider 54 is located at the top of the first sliding section 5111 and at the bottom of the second sliding section 5112, and when the powder bin 21 is in the powder removing position, the slider 54 is located at the top of the second sliding section 5112;

[0074] When the powder bin 21 swings from the powder receiving position to the extraction position, the slider 54 slides from the bottom end to the top end of the first sliding section 5111, so that the push plate 53 remains stationary relative to the powder bin 21;

[0075] When the powder bin 21 swings from the extraction position to the powder removal position, the slider 54 slides from the bottom end of the second sliding section 5112 to the top end, and drives the push plate 53 to move along the axial direction of the powder bin 21 toward the opening 211 through the push rod 52, thereby gradually separating the powder cake from the powder bin 21.

[0076] It should be noted that in the extraction state, Figure 7 As shown, the powder bin 21 is in the extraction position, the piston assembly 41 is in the powder pressing position, and an extraction chamber is formed between the powder bin 21 and the piston assembly 41. The piston assembly 41 and the powder bin 21 are radially sealed by a sealing ring (not shown in the figure), and the equal-diameter section of the push rod 52 and the fixed cylinder 212 are radially sealed by the sealing ring 213. When the piston assembly 41 just leaves the extraction state, the piston assembly 41 is always sealed with the powder bin 21, so that the push rod 52 moves along the axial direction of the powder bin 21 toward the opening 211 under the action of negative pressure, thereby causing the equal-diameter section of the push rod 52 to break away from the sealing ring 213 and release the sealing cooperation with the powder bin 21, and drive the slider 54 to move from the connection between the first sliding section 5111 and the second sliding section 5112 to the notch 5113. It can be seen that the setting of the notch 5113 can give the push rod 52 a certain moving space when the piston assembly 41 retreats. If there is no notch 5113, the push rod 52 is fixed when not rotating, which is not conducive to timely exhaust and vacuum release.

[0077] The working principle of this embodiment is as follows: When the coffee machine is working,

[0078] (1) Powder receiving:

[0079] In the initial state, if Figure 3 As shown, the powder bin 21 is in the powder receiving position, the piston assembly 41 is in the yielding position, the coffee machine is in the powder receiving state, and the bean grinding device 31 grinds the coffee beans into coffee powder and then delivers the coffee powder into the powder bin 21 through the powder outlet pipe 32;

[0080] (2) Extraction:

[0081] After the powder is received, the first driving mechanism 22 drives the powder bin 21 to swing to the extraction position. During this process, the piston assembly 41 is always in the yield position to avoid interfering with the movement of the powder bin 21. At the same time, the slider 54 slides from the bottom end of the first sliding section 5111 to the top end, so that the push plate 53 remains stationary relative to the powder bin 21. At this time, Figure 4 As shown, the coffee machine switches to the extraction preparation state;

[0082] Then, the second driving mechanism 42 drives the water outlet seat 411 of the piston assembly 41 to move downward along its axial direction until the piston 412 of the piston assembly 41 extends into the powder bin 21 and is pre-pressed on the top of the coffee powder. Figure 6 As shown, the piston assembly 41 is in the powder pressing position, and the coffee machine is switched to the pre-pressing state;

[0083] Then, water is pumped into the water outlet seat 411 so that the piston 412 can compress the coffee powder into a powder cake. Figure 7 As shown, the piston 412 of the piston assembly 41 and the powder bin 21 are radially sealed by a sealing ring, and the equal-diameter section of the push rod 52 and the fixed cylinder 212 are radially sealed by a sealing ring 213. When the coffee machine is switched to the extraction state, hot water can be injected into the extraction chamber through the water inlet joint 214 of the powder bin 21 to achieve extraction, and the coffee liquid is finally discharged from the water outlet seat 411 of the piston assembly 41;

[0084] After the extraction is completed, the water pump stops injecting water, and the piston 412 returns to its position under the elastic force of the return spring 413 to make the piston assembly 41 leave the extraction state. During this process, the piston 412 of the piston assembly 41 is always sealed with the powder bin 21, so that the push rod 52 moves toward the opening 211 along the axial direction of the powder bin 21 under the action of negative pressure, thereby making the equal-diameter section of the push rod 52 separate from the sealing ring 213 and release the sealing cooperation with the powder bin 21, and driving the slider 54 to move from the connection between the first sliding section 5111 and the second sliding section 5112 to the notch 5113. In this way, Figure 8 As shown, the coffee machine is switched to the pressure relief state, and the outside air can enter the extraction chamber through the gap between the push rod 52 and the fixed cylinder 212 of the powder bin 21, thereby releasing the vacuum. Then, the second driving mechanism 42 drives the water inlet seat 411 of the piston assembly 41 to move upward along its axial direction until it returns to the yielding position. At the same time, the push rod 52 is reset under the action of the elastic member 55, so that the slider 54 exits the notch 5113.

[0085] (4) Powder removal:

[0086] Then, the first driving mechanism 22 drives the powder bin 21 to swing to the powder removal position. During this process, the piston assembly 41 is always in the yield position to avoid interfering with the movement of the powder bin 21. At the same time, the slider 54 slides from the bottom end of the second sliding section 5112 to the top end, and drives the push plate 53 to move along the axial direction of the powder bin 21 toward the opening 211 through the push rod 52, so that the powder cake gradually leaves the powder bin 21. At this time, Fig. 9 As shown, the coffee machine switches to the powder removal state, and the powder cake separated from the powder bin 21 falls under the action of gravity;

[0087] (5) Reset:

[0088] Finally, the first driving mechanism 22 drives the powder bin 21 to return to the powder receiving position.

[0089] In this embodiment, the powder bin 21 and the piston assembly 41 are controlled and driven by the first driving mechanism 22 and the second driving mechanism 42 respectively, and the actions are independent and the control is simple.

[0090] Embodiment 2:

[0091] like Figures 10 to 17 FIG. 2 is a second preferred embodiment of the coffee machine of the present invention. The difference from the first embodiment is that:

[0092] In this embodiment, the first driving mechanism 22 and the second driving mechanism 42 are the same driving mechanism, which includes a gear plate 61 , a sector gear 62 , a connecting rod 63 , a crank 64 , a transmission assembly 65 and a driving structure 66 .

[0093] The outer peripheral wall of the toothed disc 61 has incomplete teeth 611 and complete teeth 612 arranged side by side in the front and back direction;

[0094] The sector gear 62 is coaxially connected to the rotating shaft connected to the powder bin 21, and has two sections of meshing teeth 621 arranged at intervals along the circumferential direction and a positioning tooth 622 connected between the two sections of meshing teeth 621. The meshing teeth 621 can mesh with the incomplete teeth 611, and the positioning teeth 622 can be tangent to the outer peripheral wall of the toothed disc 61.

[0095] The first end of the connecting rod 63 is hinged on the support plate 11 of the machine base 1, and the second end has a limiting groove 631 in a semicircular arc shape;

[0096] The first end of the crank 64 is hinged at the center of the toothed disc 61, and the second end has a rotating wheel 641 that can be slidably inserted into the limiting groove 631. The distance from the first end to the second end of the crank 64 is consistent with the radius of the limiting groove 631.

[0097] The transmission assembly 65 acts between the first end of the connecting rod 63 and the piston assembly 41, and is used to convert the rotational motion of the connecting rod 63 into the translational motion of the piston assembly 41. In this embodiment, the transmission assembly 65 is a two-connecting rod structure, including two connecting rods 651 hinged to each other, wherein the end of one connecting rod 651 is connected to the first end of the connecting rod 63, and the end of the other connecting rod 651 is hinged to the top of the piston assembly 41.

[0098] The driving structure 66 is used to drive the toothed disc 61 to rotate around its own axis. In this embodiment, the driving structure 66 is a worm gear reducer, including a motor 661, a worm 662 coaxially connected to the output shaft of the motor 661, a turbine 663 meshing with the worm 662, and a transmission gear 664 coaxially connected to the turbine 663 and meshing with the complete teeth 612.

[0099] When the meshing teeth 621 of the sector gear 62 are meshed with the incomplete teeth 611, the center of the limiting groove 631 coincides with the rotation axis of the toothed disc 61. At this time, the driving mechanism 66 drives the toothed disc 61 to rotate. On the one hand, since the meshing teeth 621 of the sector gear 62 are meshed with the incomplete teeth 611, the sector gear 62 drives the powder bin 21 to swing. On the other hand, since the center of the limiting groove 631 coincides with the rotation axis of the toothed disc 61, the rotating wheel 641 that rotates with the crank 64 slides around its center in the limiting groove 631, and does not drive the connecting rod 63 to rotate, so the piston assembly 41 remains stationary.

[0100] When the center of the limiting groove 631 deviates from the rotation axis of the toothed disk 61, the positioning teeth 622 of the sector gear 62 are tangent to the outer peripheral wall of the toothed disk 61, that is, the meshing teeth 621 of the sector gear 62 are not meshed with the incomplete teeth 611. At this time, the driving mechanism 66 drives the toothed disk 61 to rotate. On the one hand, since the center of the limiting groove 631 deviates from the rotation axis of the toothed disk 61, the rotating wheel 641 rotating with the crank 64 deviates from its center and slides in the limiting groove 631, thereby driving the connecting rod 63 to rotate, and finally driving the piston assembly 41 to translate under the action of the transmission assembly 65. On the other hand, since the meshing teeth 621 of the sector gear 62 are not meshed with the incomplete teeth 611, the sector gear 62 will not be driven to rotate, so the powder bin 21 remains stationary. In addition, the positioning teeth 622 of the sector gear 62 are tangent to the outer peripheral wall of the toothed disk 61 for positioning, so as to prevent the sector gear 62 from continuing to rotate due to inertia.

[0101] It can be seen that the circular motion of the toothed disc 61 is converted into the reciprocating motion of the connecting rod 63 within a certain angle range, and half of the time it is stationary at the same radius, and the actual rule is alternating intermittent motion with the powder bin 21.

[0102] The working principle of this embodiment is as follows:

[0103] (1) Powder receiving:

[0104] In the initial state, if Fig.13 As shown, the powder bin 21 is in the powder receiving position, the piston assembly 41 is in the yielding position, and the coffee machine is in the powder receiving state;

[0105] (2) Extraction:

[0106] After the powder is received, the transmission gear 664 of the driving structure 66 rotates clockwise to drive the toothed disc 61 to rotate 45 degrees counterclockwise. During this process, on the one hand, the crank 64 rotates 45 degrees synchronously with the toothed disc 61, but the rotation trajectory of the rotating wheel 641 coincides with the limiting groove 631 of the connecting rod 63, and cannot drive the connecting rod 63 to rotate, and the piston assembly 41 remains stationary. On the other hand, the meshing teeth 621 of the sector gear 62 mesh with the incomplete teeth 611 of the toothed disc 61, driving the entire powder bin 21 to rotate 45 degrees clockwise. At this time, as shown in FIG. Fig.14As shown, the powder bin 21 is in the extraction position, the piston assembly 41 is still in the yield position, and the coffee machine is switched to the extraction preparation state;

[0107] Then the transmission gear 664 of the driving structure 66 continues to rotate clockwise to drive the toothed disc 61 to rotate counterclockwise. During this process, on the one hand, the crank 64 rotates synchronously with the toothed disc 61, and the rotating wheel 641 of the crank 64 always keeps moving in the limiting groove 631 of the connecting rod 64, so that the connecting rod 63 rotates clockwise to the maximum angle, and the piston assembly 41 moves to the farthest position. On the other hand, the meshing teeth 621 of the sector gear 62 are disengaged from the incomplete teeth 611 of the toothed disc 61, and the positioning teeth 622 of the sector gear 62 are tangent to the outer peripheral wall of the toothed disc 61 for positioning, and the powder bin 21 remains stationary. At this time, as shown in FIG. Fig.15 As shown, the powder bin 21 is still in the extraction position, the piston assembly 41 is in the powder pressing position, and the coffee machine is switched to the pre-pressing state;

[0108] Then the motor 661 stops driving, the water pump starts to inject water, the piston 612 continues to compress the powder, and the coffee machine switches to the extraction state;

[0109] After the extraction is finished and the pressure is released, the transmission gear 664 of the driving structure 66 continues to rotate clockwise to drive the toothed disc 61 to rotate counterclockwise. During this process, on the one hand, the crank 64 rotates synchronously with the toothed disc 61, and the rotating wheel 641 of the crank 64 always keeps moving in the limiting groove 631 of the connecting rod 64, so that the connecting rod 63 moves in the opposite counterclockwise direction, and the piston assembly 41 retreats to the maximum limit. On the other hand, the positioning teeth 622 of the sector gear 62 are always tangential to the outer peripheral wall of the toothed disc 61 for positioning, and the powder bin 21 remains stationary. At this time, as shown in FIG. Fig.16 As shown, the powder bin 21 is still in the extraction position, the piston assembly 41 is in the yield position, and the coffee machine is switched to the powder removal preparation state;

[0110] (4) Powder removal:

[0111] Then the transmission gear 664 of the driving structure 66 continues to rotate clockwise and drives the toothed disc 61 to rotate 45 degrees counterclockwise. During this process, on the one hand, the crank 64 rotates 45 degrees synchronously with the toothed disc 61, but the rotation trajectory of the rotating wheel 641 coincides with the limiting groove 631 of the connecting rod 63, and cannot drive the connecting rod 63 to rotate. The piston assembly 41 remains stationary. On the other hand, the meshing teeth 621 of the sector gear 62 re-engage with the incomplete teeth 611 of the toothed disc 61, driving the entire powder bin 21 to rotate 45 degrees clockwise. At this time, as shown in FIG. Fig.17 As shown, the coffee machine switches to the powder removal state;

[0112] (5) Reset:

[0113] Then the transmission gear 664 of the driving structure 66 rotates counterclockwise to drive the toothed disc 61 to rotate 45 degrees clockwise, and the meshing teeth 621 of the sector gear 62 mesh with the incomplete teeth 611 of the toothed disc 61, driving the entire powder bin 21 to rotate 45 degrees counterclockwise. At this time, the toothed disc 61 returns to the position as shown in FIG. Fig.16 In the position shown, the sector gear 62 is out of mesh with the incomplete teeth 611 of the toothed disc 61;

[0114] Then the toothed disc 61 continues to rotate clockwise, and after about one circle, it returns to the position as shown in FIG. Fig.14 In the position shown, the meshing teeth 621 of the sector gear 62 are re-engaged with the incomplete teeth 611 of the toothed disc 61;

[0115] Finally, the toothed disc 61 continues to rotate 45 degrees clockwise, and the meshing teeth 621 of the sector gear 62 mesh with the incomplete teeth 611 of the toothed disc 61, driving the entire powder bin 21 to rotate 45 degrees counterclockwise to return to the state as shown in FIG. Fig.13 Initial position shown.

[0116] In this embodiment, the powder bin 21 and the piston assembly 41 are driven and controlled by the same driving mechanism, so their actions are linked and the control is precise.

Claims

1. A coffee machine, comprising a base (1) and a powder bin unit (2) and a powder pushing unit (5) mounted on the base (1), wherein the powder bin unit (2) comprises a powder bin (21) with an opening (211) at the top and a first driving mechanism (22) for driving the powder bin (21) to swing, wherein the powder bin (21) has at least an extraction position and a powder removal position during the swinging process, and wherein: The powder pushing unit (5) comprises A push rod (52) extending along the axial direction of the powder bin (21) and having a head portion penetrating into the powder bin (21), and configured to be capable of reciprocating along the axial direction of the powder bin (21); A push plate (53), located in the powder bin (21) and mounted on the head of the push rod (52); A slider (54) rotatably mounted on the tail of the push rod (52); and The slide seat (51) is fixed relative to the machine base (1), and is provided with a slide slot (511) for limiting the sliding movement of the slider (54) therein, wherein the slide slot (511) comprises a second sliding section (5112) having a first end and a second end; and when the powder bin (21) is in the extraction position, the slider (54) is located at the first end of the second sliding section (5112), and when the powder bin (21) is in the powder removal position, the slider (54) is located at the second end of the second sliding section (5112); and is further configured as follows: During the process of the powder bin (21) swinging from the extraction position to the powder removal position, the slider (54) slides from the first end to the second end of the second sliding section (5112), thereby driving the push rod (52) to move with the push plate (53) along the axial direction of the powder bin (21) toward the opening (211), thereby causing the powder cake to gradually separate from the powder bin (21).

2. The coffee machine according to claim 1, characterized in that: The second sliding section (5112) gradually approaches the rotation axis of the powder bin (21) from the first end to the second end.

3. The coffee machine according to claim 2, characterized in that: The second sliding section (5112) is arc-shaped.

4. The coffee machine according to claim 1, characterized in that: The powder bin (21) also has a powder receiving position during the swinging process, and the extraction position is located between the powder receiving position and the powder removing position; The slide groove (511) further comprises a first sliding section (5111) having a first end and a second end, the first end of the second sliding section (5112) being connected to the second end of the first sliding section (5111); and when the powder bin (21) is in a powder receiving position, the sliding block (54) is located at the first end of the first sliding section (5111), and when the powder bin (21) is in an extraction position, the sliding block (54) is located at the second end of the first sliding section (5111); and is further configured as follows: During the process of the powder bin (21) swinging from the powder receiving position to the extraction position, the slider (54) slides from the first end to the second end of the first sliding section (5111), and the push plate (53) remains stationary relative to the powder bin (21).

5. The coffee machine according to claim 4, characterized in that: The first sliding section (5111) is in the shape of an arc, and the center of the first sliding section (5111) coincides with the rotation axis of the powder bin (21).

6. The coffee machine according to claim 1, characterized in that: The bottom of the powder bin (21) has a fixed cylinder (212) for the push rod (52) to pass through, the tail of the push rod (52) has a movable cylinder (521) sleeved with the fixed cylinder (212), and the slider (54) is rotatably mounted on the outer peripheral wall of the movable cylinder (521).

7. The coffee machine according to claim 6, characterized in that: The powder pushing unit (5) further comprises an elastic member (55) which acts between the fixed cylinder (212) and the movable cylinder (521) so that the sliding block (54) always has a tendency to abut against the inner wall of the sliding groove (511) away from the powder bin (21).

8. The coffee machine according to any one of claims 1 to 7, characterized in that: An extraction unit (4) is installed on the machine base (1), and the extraction unit (4) includes A piston assembly (41) facing the opening (211) of the powder bin (21) at the extraction position; as well as a second driving mechanism (42) for driving the piston assembly (41) to translate along its axial direction between a yielding position and a powder pressing position; In the extraction state, the powder bin (21) is in the extraction position, the piston assembly (41) is in the powder pressing position, and an extraction chamber is formed between the powder bin (21) and the piston assembly (41). The piston assembly (41) and the push rod (52) are both in sealing cooperation with the powder bin (21).

9. The coffee machine according to claim 8, characterized in that: A notch (5113) is provided on the inner side wall of the slide groove (511) located at the first end of the second sliding section (5112) and close to the powder bin (21); When the piston assembly (41) just leaves the extraction state, the piston assembly (41) is always in sealing cooperation with the powder bin (21), so that the push rod (52) moves axially toward the opening (211) of the powder bin (21) under the action of negative pressure, thereby releasing the sealing cooperation between the push rod (52) and the powder bin (21), and driving the slider (54) to move from the first end of the second sliding section (5112) to the notch (5113).

10. The coffee machine according to claim 8, characterized in that: The first driving mechanism (22) and the second driving mechanism (42) are the same driving mechanism, which comprises A toothed disc (61) having incomplete teeth (611) on its outer peripheral wall; A sector gear (62) connected to the side of the powder bin (21) and capable of meshing with the incomplete teeth (611); A connecting rod (63), the first end of which is hinged on the machine base (1), and the second end of which has a circular arc-shaped limiting groove (631); A crank (64), the first end of which is hinged at the center of the toothed disc (61), and the second end of which has a rotating wheel (641) that can be slidably inserted into the limiting groove (631), and the distance from the first end to the second end of the crank (64) is consistent with the radius of the limiting groove (631); a transmission assembly (65), acting between the first end of the connecting rod (63) and the piston assembly (41), and used for converting the rotational motion of the connecting rod (63) into the translational motion of the piston assembly (41); as well as A driving structure (66) for driving the toothed disc (61) to rotate around its own axis; When the sector gear (62) is meshing with the incomplete teeth (611), the center of the limiting groove (631) coincides with the rotation axis of the toothed disc (61); When the center of the limiting groove (631) deviates from the rotation axis of the toothed disc (61), the sector gear (62) and the incomplete teeth (611) are not meshed.

Images