Powder ejecting mechanism for coffee machine and coffee machine

Abstract

The utility model belongs to the technical field of coffee machines, in particular to a powder ejecting mechanism for a coffee machine, which comprises a spring telescopic rod and a sliding block used for being connected with a piston in a brewing cavity, the spring telescopic rod comprises an outer cylinder, an ejector rod and a pressure spring, the outer cylinder is rotatably connected to the coffee machine, the extension end of the ejector rod is L-shaped, and the pressure spring is positioned between the outer cylinder and the ejector rod; a sliding groove is formed in the shaft side surface of the ejector rod. The driving mechanism is used for driving the outer cylinder or the brewing unit to reciprocate along the movement direction of the piston; the coffee machine further comprises an elastic supporting part connected to the coffee machine, and the other end of the elastic supporting part abuts against or is movably connected to the outer wall of the outer cylinder. A motor, a lead screw and a thread sleeve structure of an existing pressed powder cake ejecting mechanism do not need to be used any more, the structure is relatively simpler, the manufacturing cost is lower, the coaxiality of the ejecting stroke does not need to be guaranteed, the ejecting process is more stable, and the coffee machine still has reliable beverage production quality after being put into use for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee machine technical field, specifically is top powder mechanism and coffee machine for coffee machine. BACKGROUND

[0002] The existing full-automatic coffee machine realizes the full-automatic production of beverage from raw materials to finished products through the integration of grinding, brewing, stirring and temperature control functions, and has been widely applied in family and commercial scenes.

[0003] The brewing process of the coffee machine refers to the whole process of brewing coffee, including powder pressing, brewing and residue removal.

[0004] At present, the coffee machine generally pushes out the coffee cake in the brewing chamber by the piston and then scrapes it off. For this process, the specific structure design generally adopts the structure of motor cooperating with screw rod and screw sleeve to drive the piston to realize reciprocating action. However, such design scheme is still relatively complex in structure and has relatively high manufacturing cost.

[0005] In addition, since such structure generally needs to ensure the coaxiality of the push rod connected with the piston and the brewing chamber, otherwise the wear degree of the piston is easily increased, which may finally cause more residues after the cake is pushed out, so that the quality of coffee beverage cannot be guaranteed.

[0006] Therefore, in order to further improve the reliability of the cake pushing-out action, the application provides a coffee machine top powder mechanism and coffee machine with lower manufacturing cost and more reliable pushing-out action. CONTENT OF THE UTILITY MODEL

[0007] In view of the deficiencies of the prior art, the utility model provides a coffee machine top powder mechanism and coffee machine, which solves the problems of high cost and insufficient reliability of the mechanism for pushing out the cake in the brewing process of the existing coffee machine.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a coffee machine top powder mechanism for linear reciprocating motion of the brewing chamber cake pushing-out, comprising a spring telescopic rod and a sliding block for connecting the piston in the brewing chamber, characterized in that the spring telescopic rod comprises an outer cylinder rotatably connected to the coffee machine, a top rod with the extension end in L shape in the outer cylinder, and a compression spring between the bottom of the outer cylinder and the top rod.

[0009] The shaft side surface of the top rod is provided with a sliding groove, and the inner wall of the outer cylinder is further provided with a guide convex, and when the top rod moves, the guide convex and the sliding groove drive the top rod to rotate relative to the outer cylinder.

[0010] It further comprises an elastic support part connected to the coffee machine for resetting after the rotation of the outer cylinder.

[0011] By the present implementation, the motor, the screw rod and the screw sleeve structure of the existing powder ejecting mechanism are not needed, the structure is relatively simple, the manufacturing cost is lower, the coaxiality of the ejection stroke does not need to be ensured, the ejection process is more stable, and the coffee machine still has reliable beverage production quality after being used for a long time.

[0012] Preferably, the sliding block is outwardly protruded on one side of the ejecting rod.

[0013] Preferably, the ejecting rod comprises a fixedly connected ejecting block and a rotating block, the sliding groove is located on the rotating block, and the opening of the outer cylinder near the ejecting block has a smaller hole diameter than the rotating block.

[0014] Preferably, the bottom of the rotating block is further provided with an intermediate rotating block rotatable on the rotating block, the compression spring is located between the bottom of the outer cylinder and the intermediate rotating block, and the compression spring is in a compressed state in a natural state.

[0015] Preferably, the buffer ring is further arranged between the abutting position of the rotating block and the end of the outer cylinder.

[0016] Preferably, the end of the rotating block near the ejecting block is provided with a limiting groove, the ejecting block is provided with a limiting protrusion matched with the limiting groove, and the limiting groove and the limiting protrusion are assembled so that the rotating block and the ejecting block cannot be radially deviated.

[0017] Preferably, the path of the sliding groove is in a straight line or a spiral line, and the sliding groove and the guide protrusion are provided with a plurality of and uniformly distributed guide protrusions.

[0018] Preferably, one end of the elastic supporting part is connected to the coffee machine, and the other end is aligned with the rotating direction of the outer cylinder.

[0019] Preferably, the elastic supporting part comprises one of a spring, a spring sheet and a soft component with resilience.

[0020] To achieve the above-mentioned purpose, the utility model further provides the following technical scheme: a coffee machine comprising the powder ejecting mechanism for the coffee machine.

[0021] Preferably, the coffee machine further comprises a driving mechanism for driving the outer cylinder or the brewing unit to reciprocate along the movement direction of the piston.

[0022] Preferably, the brewing unit is connected to the driving mechanism, so that the brewing unit performs linear reciprocating motion on the coffee machine, and the driving mechanism comprises one of a pneumatic cylinder and a linear motor.

[0023] Compared with the prior art, the powder ejecting mechanism for the coffee machine and the coffee machine have the following beneficial effects:

[0024] The coffee machine uses the powder ejection mechanism and the coffee machine, and does not need to use the motor, the screw rod and the screw sleeve structure of the existing powder ejection mechanism, and the structure is relatively simple, the manufacturing cost is lower, and the coaxiality of the ejection stroke does not need to be ensured, so that the ejection process is more stable, and the coffee machine still has reliable beverage production quality after long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional assembly structure diagram of the coffee machine.

[0026] Figure 2 It is an exploded structure diagram of the powder ejection mechanism of the coffee machine.

[0027] Figure 3 It is a structure right view of the powder ejection mechanism of the coffee machine.

[0028] Figure 4 It is a three-dimensional structure diagram of the powder ejection mechanism of the coffee machine when the ejector rod is retracted.

[0029] Figure 5 It is a structure right view of the powder ejection mechanism of the coffee machine when the ejector rod is retracted.

[0030] Figure 6 It is a structure right view of the powder ejection mechanism of the coffee machine when the ejector rod is retracted.

[0031] In the drawings:

[0032] A, brewing unit; B, piston;

[0033] 1, spring telescopic rod; 11, outer cylinder; 111, guide convex; 12, ejector rod; 121, ejector block; 1211, limiting convex; 122, rotating block; 1221, sliding groove; 1222, limiting groove; 13, compression spring; 14, intermediate rotating block; 15, buffer washer; 16, rotating shaft;

[0034] 2, sliding block;

[0035] 3, elastic support part. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] The current full-automatic coffee machine, such as the Chinese invention patent with the application number CN202410932099.2 discloses a brewing type full-automatic coffee machine, which discloses a technical solution that needs to add coffee powder in the brewing cavity and press the powder in the brewing cavity to form a powder cake. In one implementation, the pushing of the piston is completed by the powder pressing motor, the lead screw and the transmission nut. Such a design scheme is not cost-competitive, and the operation stability of the driving components is relatively high, which is not conducive to the commercial promotion of the full-automatic coffee machine.

[0038] In the technical solution, the brewing unit refers to the brewing unit in the existing full-automatic coffee machine, which has a brewing cavity and a piston in the brewing cavity. The technical solution aims to solve the shortcomings of the existing design scheme in terms of structural cost and operation requirements.

[0039] Embodiment 1:

[0040] Please refer to Figures 1-6 The utility model provides the following technical scheme: a powder ejecting mechanism for a coffee machine,

[0041] The powder cake ejecting mechanism for linear reciprocating motion comprises a spring telescopic rod 1 and a sliding block 2 connected to the piston B in the brewing cavity. The spring telescopic rod 1 comprises an outer cylinder 11, a top rod 12 with an L-shaped extension end in the outer cylinder 11, and a compression spring 13 between the bottom of the outer cylinder 11 and the top rod 12. The shaft side surface of the top rod 12 is provided with a sliding groove 1221, and the inner wall of the outer cylinder 11 is also provided with a guide convex 111. When the top rod 12 moves, the guide convex 111 drives the top rod 12 to rotate relative to the outer cylinder 11 through the cooperation of the sliding groove 1211.

[0042] The outer cylinder 11 is rotationally connected to the coffee machine through a rotating shaft 16. The mechanism further comprises an elastic support part 3 connected to the coffee machine for resetting the outer cylinder 11 after rotation. The other end of the elastic support part 3 is aligned with the rotation direction of the outer cylinder 11 and is abutted or movably connected to the outer wall of the outer cylinder 11. The side of the sliding block 2 close to the top rod 12 is protruded outward, so that the sliding block 2 as a whole can be L-shaped.

[0043] As an optional implementation of the utility model, when the powder cake is ejected, the driving mechanism drives the brewing unit A or the outer cylinder 11 to perform linear reciprocating motion, so that the relative position of the brewing unit A and the outer cylinder 11 is close together. The sliding block 2 connected to the piston B in the brewing cavity can contact the top rod 12 and generate mutual force. If the size of the powder cake is large and does not need to be compressed or only needs to be slightly compressed, the sliding block 2 directly moves in the brewing cavity to drive the piston B to eject the powder cake. However, such a situation is rare, and the compression spring 13 is generally needed.

[0044] When the compression spring 13 is first compressed, the ejector rod 12 slides in the outer cylinder 11 to compress the compression spring 13, and when the compression spring 13 is compressed to a certain extent, the reaction force of the compression spring 13 on the ejector rod 12 is greater than the frictional force that needs to be overcome by the piston B when it moves in the brewing chamber, so the piston B can move in the brewing chamber in the direction of the reaction force of the compression spring 13, thereby ejecting the coffee powder cake in the brewing chamber; due to the misalignment of the sliding grooves 1221 on the two ends of the ejector rod 12 in height and horizontal position, the guide protrusion 111 on the outer cylinder 11 cooperates with the sliding grooves 1221, so that the ejector rod 12 rotates while sliding in the outer cylinder 11, and due to the L shape of the ejector rod 12, this part will be out of contact with the sliding block 2 as the ejector rod 12 rotates, and the ejector rod 12 moves in the opposite direction due to the reaction force of the compression spring 13. Then, after the ejector rod 12 is out of contact with the sliding block 2, the sliding block 2 and the piston B remain stationary in the brewing chamber even if the brewing chamber continues to move the sliding block 2, so that the piston B is not ejected from the brewing chamber; at this time, the operation of the driving mechanism can be stopped, so that the relative movement of the brewing unit A and the outer cylinder 11 stops;

[0045] The driving mechanism is reversely operated to drive the brewing unit A or the outer cylinder 11 to relatively displace in the opposite direction, and at this time, the sliding block 2 with the L-shaped bottom will hook the top end of the ejector rod 12 which has been reset, and under the continuous driving of the driving mechanism, the sliding block 2 will retreat to the initial position due to the pulling force of the ejector rod 12, so as to be ready for the next time of putting in coffee powder; when the sliding block 2 is reset to the position, the force point of the L-shaped ejector rod 12 does not coincide with the axis of the outer cylinder 11, so the outer cylinder 11 is naturally subjected to the tilting force and can rotate along the rotating shaft 16, so that the bottom of the sliding block 2 is out of contact with the ejector rod 12 again, so that the entire brewing unit A returns to the original position, and the coffee machine can perform the next powder pressing and brewing process.

[0046] In the embodiment, the piston B of the prior art is generally not separated from the brewing chamber, and the brewing chamber and the piston B are in interference fit, and the end of the brewing chamber close to the sliding block 2 has a limiting effect on the piston B, so that the piston B is limited and prevented from being separated from the brewing chamber. However, the L-shaped sliding block 2 in the technical solution avoids the situation that the sliding block 2 completely enters the brewing chamber during the process of ejecting the powder cake.

[0047] Further, the contact surface between the sliding block 2 and the ejector rod 12 in the technical solution should be relatively smooth, or the brewing chamber has a guide rail that keeps the sliding direction of the sliding block 2 stable, so as to ensure that the sliding block 2 does not deflect due to the radial force generated by the self-rotation of the ejector rod 12 when the sliding block 2 is in pressure contact with the ejector rod 12, so that the ejector rod 12 cannot move out of the position of being out of contact with the sliding block 2, and the sliding block 2 cannot accurately hook the ejector block when it is reset subsequently.

[0048] Further, the top rod 12 and the outer cylinder 11 are provided with an anti-disengagement structure. The anti-disengagement structure can be that the rotating block 122 of the embodiment 2 has an outer diameter greater than the caliber of the outer cylinder 11, or the two ends of the chute 1221 are not through the shaft end of the top rod 12. The embodiment does not make specific limitations on this, and any solution that can avoid the top rod 12 from disengaging from the outer cylinder 11 under the reaction force of the compression spring 13 belongs to the scope of the anti-disengagement structure.

[0049] Further, the stroke of the top rod 12 is generally related to the sliding stroke of the piston B in the brewing cavity, and the stroke of the sliding block 2 is naturally related to the stroke of the top rod 12. Therefore, the vertical height of the two ends of the chute 1221 should be equal to or close to the stroke of the piston B. Of course, those skilled in the art can also use a sliding block 2 with adjustable length, or a top rod 12 with different strokes. The technical solution does not make further limitations on this.

[0050] Further, for the rotating stroke of the top rod 12, the included angle of the two ends of the chute 1221 corresponding to the shaft end surface of the top rod 12 should have a minimum range. However, this minimum range is related to the L-shaped shape of the sliding block 2 and the top block. Therefore, it should be understood that the self-rotation angle of the top rod 12 should at least ensure that the top rod 12 can disengage from the sliding block 2 during rotation. The specific angle is not limited in the technical solution.

[0051] Further, for the hooking state of the sliding block 2 and the top rod 12, that is, during the resetting process of the brewing unit A, to further improve the smoothness of the resetting of the sliding block 2, the L-shaped lower part of the top rod 12 and the L-shaped upper part of the sliding block 2 (i.e., the position where the sliding block 2 and the top rod 12 contact each other when they are hooked) can be designed as a slope guide to avoid damage to the entire elastic telescopic rod due to insufficient inclination of the outer cylinder 11.

[0052] By using the embodiment, the motor, screw rod, and screw sleeve structure of the existing top powder cake mechanism are not needed, the structure is relatively simple, the manufacturing cost is lower, the coaxiality of the ejection stroke does not need to be ensured, and therefore the ejection process is more stable, so that the coffee machine still has reliable beverage production quality after long-term use.

[0053] Embodiment 2:

[0054] As shown in Figure 2 the coffee machine top powder mechanism, including a spring telescopic rod 1 and a sliding block 2 for connecting the piston B in the brewing cavity. The spring telescopic rod 1 includes an outer cylinder 11 rotatably connected to the coffee machine, a top rod 12 with an L-shaped extension end in the outer cylinder 11, and a compression spring 13 between the outer cylinder 11 and the top rod 12. The shaft side surface of the top rod 12 is provided with a chute 1221, and the two ends of the chute 1221 are not aligned in height and horizontal position. The inner wall of the outer cylinder 11 is further provided with a guide protrusion 111 which can extend into the chute 1221.

[0055] It also includes a drive mechanism for driving the outer cylinder 11 or brewing unit A to reciprocate along the direction of piston B movement, the drive mechanism including one of a cylinder and a linear motor;

[0056] It also includes an elastic support 3 connected to the coffee machine, the other end of which abuts against or is movably connected to the outer wall of the outer cylinder 11, and the bottom of the slider 2 is L-shaped.

[0057] The push rod 12 includes an ejector block 121 and a rotating block 122 that are fixedly connected to each other. The slide groove 1221 is located on the rotating block 122. The diameter of the opening of the outer cylinder 11 near the ejector block 121 is smaller than the diameter of the rotating block 122.

[0058] As an optional implementation of this utility model, as described in Embodiment 1, the scheme of preventing the rotating block 122 from detaching from the outer cylinder 11 can support the purpose of preventing the push rod 12 from detaching from the outer cylinder 11. This structural design also facilitates the replacement of rotating blocks 122 of different specifications, such as replacing push rods 12 with different strokes to adapt to the production of coffee powder cakes of different specifications.

[0059] like Figure 2 As shown, the bottom of the rotating block 122 is also provided with an intermediate rotating block 14 that can rotate on the rotating block 122. The compression spring 13 is located between the bottom of the outer cylinder 11 and the intermediate rotating block 14, and the compression spring 13 is in a compressed state in its natural state.

[0060] As an optional implementation of this utility model, it is ensured that the top rod 12 does not exert torque on the compression spring 13 when it rotates, thus ensuring the effectiveness of the structure.

[0061] Furthermore, it also includes a buffer washer 15 located between the rotating block 122 and the end of the outer cylinder 11.

[0062] As an optional implementation of this utility model, it is ensured that when the top rod 12 is reset due to the reaction force of the compression spring 13, the limiting effect of the outer cylinder 11 on the rotating block 122 will not be damaged due to the excessive impact force of the compression spring 13.

[0063] Furthermore, the rotating block 122 is provided with a limiting groove 1222 at one end near the ejector block 121, and the ejector block 121 is provided with a limiting protrusion 1211 that cooperates with the limiting groove 1222. After the limiting groove 1222 and the limiting protrusion 1211 are assembled, the rotating block 122 and the ejector block 121 cannot be radially offset.

[0064] As an optional embodiment of the utility model, considering the sectional design of the rotating block 122 and the ejection block 121 to form the ejector rod 12, when the ejector rod 12 rotates, it is necessary to ensure that the upper end of the ejector rod 12 can accurately separate from the bottom of the sliding block 2, so it is necessary to ensure that the rotating block 122 and the ejection block 121 cannot produce radial slip. The specific shape of the limiting groove 1222 and the limiting protrusion 1211 has a variety of realizable ways in the prior art, and it should be understood that any scheme that realizes that the two components cannot produce radial slip after assembly belongs to the scope of the present technical solution.

[0065] As shown in Figure 2 , the path of the sliding groove 1221 is linear or spiral, and the sliding groove 1221 and the guide convex 111 are provided with multiple and uniformly distributed.

[0066] As an optional embodiment of the utility model, generally speaking, the linear type is easier to process, and the spiral shape makes the rotation of the ejection block 121 more stable, but no matter which one is adopted, the function of the ejector rod 12 can be rotated, and the setting of multiple sliding grooves 1221 and guide convexes 111 ensures that the rotation process of the ejector rod 12 is more stable.

[0067] As shown in Figure 3 , Figures 5-6 , the elastic support part 3 includes one of a spring, a spring sheet or a soft component with resilience.

[0068] As an optional embodiment of the utility model, for the soft component with resilience, it should be understood as a soft rubber or the like with resilience, and of course, the specific selection of the elastic support part 3 is not limited.

[0069] Embodiment 3:

[0070] Please refer to Figure 1 , the utility model provides the following technical scheme: a coffee machine comprising a coffee machine powder ejecting mechanism as above.

[0071] Preferably, it further comprises a driving mechanism for reciprocating movement of the brewing unit A along the movement direction of the piston B, and the driving mechanism comprises one of a pneumatic cylinder and a linear motor, so that the brewing unit A performs linear reciprocating motion on the coffee machine.

[0072] The working principle and use process of the utility model are as follows: after the powder cake is formed, the driving mechanism drives the brewing unit A to move downwards, the slider 2 contacts the jib 12, the jib 12 exerts force on the compression spring 13, when the reaction force of the compression spring 13 reaches a certain degree, the friction of the piston B in the brewing cavity can be overcome, the piston B and the brewing cavity are relatively moved, namely the piston B ejects the powder cake in the brewing cavity. After the powder cake is ejected, the jib 12 slides in the outer cylinder 11 and also rotates at the same time, the L-shaped jib 12 deviates from the L-shaped slider 2, so the reaction force of the compression spring 13 can reset the jib 12.

[0073] Then the brewing unit A moves upwards, the reset L-shaped jib 12 hooks the slider 2, the slider 2 drives the piston B to reset, finally the force of the L-shaped jib 12 and the slider 2 does not coincide with the axis of the outer cylinder 11, the L-shaped jib 12 is subjected to lateral force, so the slider 2 finally separates from the jib 12, the inclined jib 12 also resets under the reaction force of the elastic support part 3, the reset of the elastic telescopic rod, the piston B and the brewing unit A is completed, so as to prepare for the next coffee powder cake production.

[0074] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A coffee machine coffee maker's coffee maker ejection mechanism for ejecting coffee caddy from a reciprocating brewing chamber, comprising a spring-loaded telescopic rod and a slider for connecting to a piston inside the brewing chamber, characterized in that... The spring telescopic rod comprises an outer cylinder rotatably connected to the coffee machine, a top rod with an L-shaped extending end in the outer cylinder, and a compression spring between the bottom of the outer cylinder and the top rod; The shaft side surface of the top rod is provided with a sliding groove, and the inner wall of the outer cylinder is further provided with a guide convex, when the top rod moves, the guide convex and the sliding groove cooperate to drive the top rod to rotate relative to the outer cylinder; Further comprising an elastic supporting part connected to the coffee machine for resetting the outer cylinder after rotation.

2. The top-powder mechanism for a coffee maker according to claim 1, characterized in that, The sliding block is outwardly protruded on one side of the top rod.

3. The top-powder mechanism for a coffee maker according to claim 1, characterized in that, The top rod comprises a ejection block and a rotating block fixedly connected to each other, the sliding groove is located on the rotating block, and the aperture of the opening of the outer cylinder near the ejection block is smaller than the aperture of the rotating block.

4. The top-powder mechanism for a coffee maker according to claim 3, characterized in that, The bottom of the rotating block is further provided with an intermediate rotating block rotatable on the rotating block, the compression spring is located between the bottom of the outer cylinder and the intermediate rotating block, and the compression spring is in a compressed state in a natural state.

5. The top-powder mechanism for a coffee maker according to claim 3, characterized in that, Further comprising a buffer washer arranged between the abutting position of the rotating block and the end of the outer cylinder.

6. The top-powder mechanism for a coffee maker according to claim 3, characterized in that, The end of the rotating block near the ejection block is provided with a limiting groove, the ejection block is provided with a limiting convex matched with the limiting groove, and the limiting groove and the limiting convex are assembled so that the rotating block and the ejection block cannot be radially deviated after assembly.

7. The top-powder mechanism for a coffee maker according to claim 1, characterized in that, The path of the sliding groove is linear or helical, and the sliding groove and the guide convex are provided with multiple and uniformly distributed ones.

8. The top-powder mechanism for a coffee maker according to claim 1, characterized in that, One end of the elastic supporting part is connected to the coffee machine, and the other end is aligned with the rotation direction of the outer cylinder.

9. A coffee machine top powder mechanism according to claim 8, characterized in that, The elastic supporting part comprises one of a spring, a spring sheet, or a soft component with resilience.

10. Coffee machine, characterized in that, The coffee machine comprises the powder ejecting mechanism according to any one of claims 1-9.

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