Bean grinding mechanism and coffee machine

Abstract

The utility model relates to the field of coffee machines, in particular to a bean grinding mechanism and a coffee machine, the bean grinding mechanism comprises a static grinding wheel and a movable grinding wheel, the static grinding wheel is provided with a grinding cavity used for containing the movable grinding wheel, the cavity wall of the grinding cavity and the outer wall of the movable grinding wheel are provided with grinding teeth, and a bean grinding gap is formed between the movable grinding wheel and the static grinding wheel. The fixed grinding wheel is fixedly mounted; the base is provided with a blanking channel; a grinding shaft is arranged in the blanking channel; the movable grinding wheel is fixedly mounted at the bottom of the grinding shaft; the top of the grinding channel is connected with a hopper; the grinding cylinder can be movably mounted at the bottom of the grinding channel in the axial direction of the grinding shaft; the lifting adjusting assembly is installed on the base and used for controlling the grinding cylinder to move in the axial direction of the grinding shaft so as to adjust the bean grinding gap. Displacement of the grinding cylinder along the axis of the grinding cylinder by one pitch can be realized only by rotating the adjusting rod by one circle, and the technical problem of low bean grinding gap adjusting efficiency in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coffee machine, concretely is related to a kind of coffee bean grinding mechanism and coffee machine. BACKGROUND

[0002] The coffee bean grinding mechanism of coffee machine as its core component, undertakes the key task of grinding coffee beans into suitable brewing powder.The difference of grinding fineness directly affects the final taste of coffee.In view of the individualized needs of different users for coffee taste, the coffee bean grinding mechanism of coffee machine needs to have the function of adjusting grinding fineness.

[0003] Chinese patent authorized announcement No.CN220256290U discloses a kind of coffee machine coffee bean grinding mechanism, is driven by rotating adjustment gear wheel to drive adjustment tooth disc rotation, in turn, the base inside adjustment tooth disc is realized up and down movement, synchronous drive coffee bean knife up and down movement, to realize the adjustment of grinding fineness.

[0004] However, the transmission structure in the prior art includes a primary transmission composed of gear transmission and a secondary transmission composed of screw transmission, and the transmission structure is complex.Because the primary transmission is a speed reduction mechanism, the transmission efficiency is low.When the knife holder needs to move a pitch in the vertical direction, the adjustment gear wheel needs to be rotated N times according to the transmission ratio N of the primary transmission mechanism, which is extremely inconvenient to operate.

[0005] In addition, during the coffee grinding process, if the resistance is large, the resistance will act on the knife holder, which may cause the knife holder to rotate in the same direction as the coffee bean knife.Due to the movable screw connection between the knife holder and the adjustment tooth disc, the knife holder will rotate relative to the adjustment tooth disc, thereby changing its position in the vertical direction.This change will directly cause the gap between the coffee bean knife and the knife holder (i.e., the coffee grinding gap) to change, thereby affecting the grinding effect and causing the particle size of the obtained coffee powder to be inconsistent. UTILITY MODEL CONTENTS

[0006] To solve the above problems, a coffee bean grinding mechanism and coffee machine are provided, and a connecting sleeve is arranged beside the grinding cylinder in the grinding system to improve the adjustment efficiency of the coffee grinding gap.The connecting sleeve is connected to the adjustment rod by screw transmission, thereby realizing the lifting adjustment of the grinding cylinder.Specifically, only one rotation of the adjustment rod is needed to drive the grinding cylinder to move a pitch distance along its axial direction.This design significantly optimizes the adjustment process of the coffee grinding gap, effectively solving the problem of low adjustment efficiency of the coffee grinding gap in the prior art.

[0007] In order to solve the prior art problems, the utility model provides a bean grinding mechanism for coffee machine, including static grinding wheel and dynamic grinding wheel, static grinding wheel has the grinding cavity for containing dynamic grinding wheel, the cavity wall of grinding cavity and the outer wall of dynamic grinding wheel all have grinding tooth, and the bean grinding gap is formed between dynamic grinding wheel and static grinding wheel, still include: grinding cylinder, to fasten and install static grinding wheel, and base has blanking channel, blanking channel is equipped with grinding shaft, and dynamic grinding wheel is fixedly installed at the bottom of grinding shaft, the top of grinding channel is connected with hopper, grinding cylinder can be installed in the bottom of grinding channel along the axial movement of grinding shaft, and lifting adjustment assembly is installed on base, to control the axial movement of grinding cylinder along the grinding shaft to adjust the bean grinding gap.

[0008] Preferably, the lifting adjustment assembly comprises: an adjustment rod rotatably arranged on the base and having an axis parallel to the axis of the grinding shaft; a connecting sleeve fixedly arranged beside the grinding cylinder and having a threaded hole; a lower section of the adjustment rod is provided with external threads threadedly matched with the threaded hole, and an upper section of the adjustment rod extends into the hopper.

[0009] Preferably, a top of the adjustment rod is provided with an adjustment knob.

[0010] Preferably, the hopper is provided with a locking groove, and the adjustment knob is provided with a locking screw, and the lower end of the locking screw is arranged in the locking groove by screwing.

[0011] Preferably, a dredging rod above the dynamic grinding wheel is arranged on the grinding shaft.

[0012] Preferably, a stabilizing frame for mounting the grinding shaft is arranged in the grinding channel.

[0013] Preferably, the base is further provided with a driving motor and a transmission mechanism, and the driving motor is in transmission connection with the grinding shaft through the transmission mechanism.

[0014] Preferably, the transmission mechanism comprises at least a primary transmission mechanism and a secondary transmission mechanism, the primary transmission mechanism comprises a worm in transmission connection with the driving motor and a worm wheel in transmission connection with the worm, a first pulley is fixedly arranged on a rotating shaft of the worm wheel, a second pulley is fixedly arranged on the grinding shaft, and a synchronous belt is in transmission connection between the first pulley and the second pulley, and the first pulley, the second pulley and the synchronous belt constitute the secondary transmission mechanism.

[0015] Preferably, the base is provided with a connecting seat for connecting with the coffee machine, and the connecting seat is provided with a buffer rubber sleeve.

[0016] The utility model discloses a coffee machine comprising the bean grinding mechanism.

[0017] The beneficial effect of the utility model compared with prior art is: in the grinding system, for improving the adjustment efficiency of the bean grinding gap, the connecting sleeve is configured on the side of the grinding cylinder. The connecting sleeve is connected with the adjusting rod through the thread transmission mode, and then the lifting adjustment of the grinding cylinder is realized. Specifically, only one rotation of the adjusting rod can drive the grinding cylinder to move along the axial direction by one pitch distance. This design significantly optimizes the adjustment process of the bean grinding gap, and effectively solves the problem of low adjustment efficiency of the bean grinding gap in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional structure schematic view of a bean grinding mechanism of the utility model.

[0019] Figure 2 is a top view of a bean grinding mechanism of the utility model.

[0020] Figure 3 is Figure 2 the plane structure schematic view of the A-A section surface.

[0021] Figure 4 is Figure 2 the three-dimensional structure schematic view of the A-A section surface.

[0022] Figure 5 is a partial section structure schematic view of a bean grinding mechanism of the utility model.

[0023] Figure 6 is a three-dimensional exploded structure schematic view of a bean grinding mechanism of the utility model Figure 1 .

[0024] Figure 7 is a three-dimensional exploded structure schematic view of a bean grinding mechanism of the utility model Figure 2 .

[0025] Marked in the figure: 1, static grinding wheel; 2, dynamic grinding wheel; 3, grinding cylinder; 4, base; 5, grinding shaft; 6, hopper; 7, adjusting rod; 8, connecting sleeve; 9, locking groove; 10, adjusting knob; 11, locking screw; 12, dredging rod; 13, stabilizing frame; 14, driving motor; 15, worm; 16, worm wheel; 17, synchronous belt; 18, buffer rubber sleeve. DETAILED DESCRIPTION

[0026] In order to further understand the features, technical means and specific purposes and functions reached by the utility model, the utility model is described in further detail below in combination with the drawings and specific embodiments.

[0027] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figure 6 and Figure 7 A grinding mechanism for a coffee machine, as shown in FIG. 1, comprises a static grinding wheel 1 and a dynamic grinding wheel 2, the static grinding wheel 1 has a grinding cavity for accommodating the dynamic grinding wheel 2, the cavity wall of the grinding cavity and the outer wall of the dynamic grinding wheel 2 are both provided with grinding teeth, and the dynamic grinding wheel 2 and the static grinding wheel 1 form a grinding gap. It also includes a grinding cylinder 3, a base 4 and a lifting adjustment assembly; the grinding cylinder 3 is used to tightly install the static grinding wheel 1; the base 4 has a material falling channel; the material falling channel is provided with a grinding shaft 5, and the dynamic grinding wheel 2 is fixedly installed at the bottom of the grinding shaft 5; the top of the grinding channel is connected with a hopper 6; the grinding cylinder 3 can be movably installed at the bottom of the grinding channel along the axial direction of the grinding shaft 5; the lifting adjustment assembly is installed on the base 4 to control the movement of the grinding cylinder 3 along the axial direction of the grinding shaft 5 to adjust the grinding gap. Referring to Figure 3 and Figure 4 As shown in FIG. 2, the lifting adjustment assembly comprises an adjustment rod 7 and a connecting sleeve 8; the adjustment rod 7 is rotatably arranged on the base 4, and the axis of the adjustment rod 7 is parallel to the axis of the grinding shaft 5; the connecting sleeve 8 is arranged beside the grinding cylinder 3 and has a threaded hole; the lower segment of the adjustment rod 7 is provided with external threads which are threadedly matched with the threaded hole, and the upper segment of the adjustment rod 7 extends into the hopper 6.

[0028] Through the screw transmission mechanism of the adjustment rod 7 and the connecting sleeve 8, the grinding cylinder 3 can be effectively lifted and adjusted. Specifically, only one rotation of the adjustment rod 7 can accurately realize the displacement of the grinding cylinder 3 along its axial direction by one pitch, thereby significantly improving the adjustment efficiency of the grinding gap and effectively solving the problem of low adjustment efficiency of the grinding gap in the prior art.

[0029] In addition, since the displacement of the grinding cylinder 3 is realized through the screw transmission of the adjustment rod 7 and the connecting sleeve 8, even if vibration or resistance occurs during the grinding process, it will not cause accidental displacement of the grinding cylinder 3 along its axis. Therefore, the stability of the grinding gap can be maintained, and the particle size of the ground coffee powder can be kept consistent.

[0030] Referring to Figure 3 , Figure 4 and Figure 5 As shown in FIG. 3, the top of the adjustment rod 7 is provided with an adjustment knob 10. The hopper 6 is provided with a locking groove 9, and the adjustment knob 10 is provided with a locking screw 11, and the lower end of the locking screw 11 is arranged in the locking groove 9 by screwing. Through the cooperation of the locking screw 11 and the locking groove 9, the adjustment range of the adjustment knob 10 can be effectively limited.

[0031] Referring to Figure 3 and Figure 4As shown, the unblocking rod 12 is installed on the grinding shaft 5 above the movable grinding wheel 2. During the grinding process, the rotation of the grinding shaft 5 will drive the unblocking rod 12 to rotate synchronously around the axis of the grinding shaft 5. This movement state produces an effective stirring effect on the coffee beans in the grinding channel, ensuring that the coffee beans can smoothly enter the grinding gap. Not only does it improve the smoothness of the grinding channel, but it also further ensures the continuity and stability of the ground powder.

[0032] Referring to Figure 7 As shown, the grinding channel is provided with a stabilizing frame 13 for installing the grinding shaft 5. The main function of the stabilizing frame 13 is to ensure the stability of the movable grinding wheel 2 during rotation. It prevents the grinding shaft 5 from deviating due to excessive resistance during grinding, thereby avoiding uneven distribution of the grinding gap in the circumferential direction. Specifically, if the grinding gap is unevenly distributed in the axial direction, the particle size of the ground powder in the larger area of the grinding gap will be larger than that in the smaller area of the grinding gap. Therefore, the application of the stabilizing frame 13 is crucial to ensure the consistency of grinding quality and particle size.

[0033] Referring to Figure 4 , Figure 6 and Figure 7 As shown, it also includes a drive motor 14 installed on the base 4 and a transmission mechanism, the drive motor 14 being in transmission connection with the grinding shaft 5 through the transmission mechanism.

[0034] The transmission mechanism at least includes a primary transmission mechanism and a secondary transmission mechanism; the primary transmission mechanism includes a worm 15 in transmission connection with the drive motor 14 and a worm gear 16 in transmission with the worm 15; a first pulley is fixedly installed on the rotation shaft of the worm gear 16, a second pulley is fixedly installed on the grinding shaft 5, and a synchronous belt 17 is in transmission connection between the first pulley and the second pulley, the first pulley, the second pulley and the synchronous belt 17 constituting the secondary transmission mechanism.

[0035] Referring to Figure 7 As shown, the base 4 has a connecting seat for connecting with the coffee machine, and the connecting seat is provided with a buffer rubber sleeve 18. The buffer rubber sleeve 18 plays a key role during the operation of the grinding mechanism, and it can effectively reduce the potential impact of the vibration generated by the bean grinding mechanism on other mechanisms of the coffee machine.

[0036] A coffee machine comprising the bean grinding mechanism. Due to the configuration of the bean grinding mechanism with easily adjustable and high consistency of ground powder particle size, the coffee machine can brew coffee that meets the user's needs.

[0037] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A grinding mechanism for a coffee machine comprising a static grinding wheel (1) and a dynamic grinding wheel (2), the static grinding wheel (1) having a grinding cavity for housing the dynamic grinding wheel (2), the cavity wall of the grinding cavity and the outer wall of the dynamic grinding wheel (2) each having grinding teeth, a grinding gap being formed between the dynamic grinding wheel (2) and the static grinding wheel (1), characterized in that, Also included are: a grinding cylinder (3) for fastening the stationary grinding wheel (1); and a base (4) having a grinding channel; a grinding shaft (5) is arranged in the grinding channel, and the movable grinding wheel (2) is fixedly arranged at the bottom of the grinding shaft (5); a hopper (6) is connected to the top of the grinding channel; the grinding cylinder (3) is movably arranged at the bottom of the grinding channel along the axial direction of the grinding shaft (5); and a lifting adjustment assembly is arranged on the base (4) to control the movement of the grinding cylinder (3) along the axial direction of the grinding shaft (5) to adjust the grinding gap.

2. A bean grinding mechanism according to claim 1, wherein The lifting adjustment assembly includes: an adjustment rod (7) rotatably arranged on the base (4) and having an axis parallel to the axis of the grinding shaft (5); a connecting sleeve (8) fixedly arranged beside the grinding cylinder (3) and having a threaded hole; a lower section of the adjustment rod (7) is provided with external threads matched with the threaded hole, and an upper section of the adjustment rod (7) extends into the hopper (6).

3. A bean grinding mechanism according to claim 2, wherein An adjustment knob (10) is arranged at the top of the adjustment rod (7).

4. A bean grinding mechanism according to claim 3, wherein A locking groove (9) is arranged on the hopper (6), and a locking screw (11) is arranged on the adjustment knob (10), and the lower end of the locking screw (11) is arranged in the locking groove (9) by screwing.

5. The bean grinding mechanism according to claim 1, wherein A dredging rod (12) is arranged above the movable grinding wheel (2) on the grinding shaft (5).

6. The bean grinding mechanism according to claim 1, wherein A stabilizing frame (13) is arranged in the grinding channel to fix the grinding shaft (5).

7. The bean grinding mechanism according to claim 1, wherein A driving motor (14) is arranged on the base (4), and a transmission mechanism is arranged between the driving motor (14) and the grinding shaft (5).

8. A bean grinding mechanism according to claim 7, wherein The transmission mechanism includes at least a primary transmission mechanism and a secondary transmission mechanism; the primary transmission mechanism includes a worm (15) in transmission connection with the driving motor (14) and a worm wheel (16) in transmission connection with the worm (15); a first pulley is fixedly arranged on the rotation axis of the worm wheel (16), a second pulley is fixedly arranged on the grinding shaft (5), and a synchronous belt (17) is arranged in transmission connection between the first pulley and the second pulley, and the first pulley, the second pulley, and the synchronous belt (17) constitute the secondary transmission mechanism.

9. The bean grinding mechanism according to claim 1, wherein The base (4) has a connecting seat for connecting with a coffee machine, and the connecting seat is provided with a buffer rubber sleeve (18).

10. A coffee maker characterized in that, The coffee machine includes the grinding mechanism according to any one of claims 1-9.

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