Dual-axis linkage upper and lower independent adjustment coffee bean grinder

Abstract

The application discloses a double-shaft linkage upper and lower independent adjustment coffee bean grinder, which comprises driving parts, an upper body, a lower body and a coffee powder box arranged in sequence from top to bottom; the upper body is provided with an upper rotating shaft, an upper adjusting device for adjusting the upper and lower positions of the upper rotating shaft, an upper grinding core and an upper grinding disc, and the upper grinding core is arranged on the upper rotating shaft; the lower body is provided with a lower rotating shaft, a lower grinding core, a lower grinding disc and a lower adjusting device; the lower end of the upper rotating shaft is connected with the upper end of the lower rotating shaft and drives the lower rotating shaft to rotate, the lower end of the upper rotating shaft can move up and down relative to the upper end of the lower rotating shaft, a lower grinding gap is formed between the lower grinding core and the lower grinding disc, the lower grinding core is arranged on the lower rotating shaft, and the lower adjusting device is used for adjusting the size of the lower grinding gap. The application can realize the function of respectively and independently adjusting the grinding gaps of two groups of knife sets, allows users to freely adjust the thickness of the grinding of the two groups of knife sets, and makes the coffee taste reach the taste required by different users.

Description

Technical Field

[0001] This invention relates to the field of coffee bean grinder technology, specifically a dual-axis linkage coffee bean grinder with independent up-and-down adjustment. Background Technology

[0002] Coffee grinder blades typically consist of a grinding core and a grinding disc. Currently, most grinders on the market use a single-cone blade structure, with a smaller number using a single-axis double-layer blade structure. However, the biggest drawback of existing single-axis double-layer blade structures is that they can only adjust the grind size of one or both blades simultaneously. The purpose of using a double-layer blade structure is to achieve uniform grinding. However, the single-axis double-layer blade structure, with its single adjustment, does not allow users to freely adjust the grind size of the two blades, resulting in coffee flavors that do not meet the needs of different users. Therefore, to avoid the shortcomings of existing technology, it is necessary to propose a new solution. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a dual-axis linkage coffee bean grinder with independent up-and-down adjustment, which can solve the aforementioned technical problems.

[0005] (II) Technical Solution

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dual-axis linkage coffee bean grinder with independent vertical adjustment, comprising a drive component, an upper body, a lower body, and a coffee powder box arranged sequentially from top to bottom. The upper body is provided with an upper rotating shaft, an upper adjustment device for adjusting the vertical position of the upper rotating shaft, an upper grinding core, and an upper grinding disc. The upper grinding core is disposed on the upper rotating shaft, and an upper grinding gap is formed between the upper grinding core and the upper grinding disc. The lower body is provided with a lower rotating shaft, a lower grinding core, a lower grinding disc, and a lower adjustment device. The lower rotating shaft and the upper rotating shaft are on the same axis. The lower end of the upper rotating shaft is connected to the upper end of the lower rotating shaft and drives the lower rotating shaft to rotate. The lower end of the upper rotating shaft can move up and down relative to the upper end of the lower rotating shaft. A lower grinding gap is formed between the lower grinding core and the lower grinding disc. The lower grinding core is disposed on the lower rotating shaft, and the lower adjustment device is used to adjust the size of the lower grinding gap.

[0007] Preferably, the upper adjustment device includes at least one of an upper inner adjuster, an upper inner fine-adjustment nut, and an upper outer adjustment ring.

[0008] Preferably, the dual-axis linkage coffee bean grinder with independent up and down adjustment also includes a hand-tightening positioning screw and a flat fixing component. The flat fixing component has a transverse through hole for assembly and connection with the drive component. The hand-tightening positioning screw passes through the drive component and is screwed to the upper end of the upper rotating shaft.

[0009] Preferably, the upper inner adjuster is screwed to the upper rotating shaft, and the upper inner adjuster is rotatably mounted on the flat fixing member.

[0010] Preferably, the upper inner fine-adjustment nut is screwed to the upper rotating shaft, and the upper inner fine-adjustment nut is located below the upper inner adjuster.

[0011] Preferably, the dual-axis linkage coffee bean grinder with independent upper and lower adjustment also includes an upper outer adjustment ring bracket, the upper outer adjustment ring is screwed to the upper outer adjustment ring bracket, and the upper outer adjustment ring bracket is connected to the upper rotating shaft.

[0012] Preferably, the lower adjustment device includes at least one of a lower inner adjuster, a lower inner fine-adjustment nut, and a lower outer adjustment ring.

[0013] Preferably, the lower inner adjuster is screwed to the lower end of the lower rotating shaft, and the lower grinding core is locked downwards by the lower inner adjuster.

[0014] Preferably, the lower inner fine-adjustment nut is screwed to the lower end of the lower rotating shaft, the lower grinding core is locked downwards by the lower inner fine-adjustment nut, and the cross-sectional area of ​​the lower inner adjuster is larger than the cross-sectional area of ​​the lower inner fine-adjustment nut.

[0015] Preferably, the lower grinding disc is located inside the lower tool assembly holder, and the lower outer adjusting ring is screwed to the outside of the lower tool assembly holder.

[0016] Preferably, the lower blade assembly holder is located inside the lower blade assembly rotating bracket, and the lower blade assembly rotating bracket is screwed and fixed to the interior of the lower main body.

[0017] Preferably, the driving component is a hand crank.

[0018] Preferably, the lower end of the upper rotating shaft is provided with a non-circular cross-section insertion protrusion, and the upper end face of the lower rotating shaft is provided with an insertion groove corresponding to the insertion protrusion, and the insertion protrusion is inserted into the insertion groove.

[0019] Preferably, the cross-section of the insertion protrusion is hexagonal, and correspondingly, the insertion groove is hexagonal.

[0020] Preferably, the upper ends of the lower rotating shaft are provided with positioning beads on both sides, and the lower ends of the upper rotating shaft are provided with grooves corresponding to the positioning beads on both sides, with the positioning beads set in the grooves.

[0021] Preferably, both the upper and lower grinding cores are conical.

[0022] Preferably, both the upper grinding core and the upper grinding disc are flat blades.

[0023] Preferably, the coffee powder box is installed at the lower end of the lower body via a threaded connection.

[0024] Preferably, the coffee powder container includes an upper powder cup and a lower powder cup arranged vertically, with a filter screen between the upper and lower powder cups.

[0025] Preferably, a first return spring is provided on the upper rotating shaft.

[0026] Preferably, a second return spring is provided on the lower rotating shaft.

[0027] (III) Beneficial Effects

[0028] Compared with existing technologies, this invention provides a dual-axis linkage coffee bean grinder with independent vertical adjustment, offering the following advantages: By setting the upper and lower rotating shafts on the same axis, a drive unit can drive the upper rotating shaft to rotate, which in turn drives the lower rotating shaft to rotate, thereby achieving the rotation of the upper and lower grinding cores. Furthermore, the upper rotating shaft can also move vertically relative to the lower rotating shaft, allowing adjustment of the upper grinding gap simply by adjusting the vertical position of the upper rotating shaft (equivalent to adjusting the vertical position of the upper grinding core, i.e., adjusting the size of the upper grinding gap). The up-and-down movement of the upper and lower blades does not affect the lower rotating shaft, thus achieving both dual-axis linkage and independent adjustment of the upper grinding gap. The lower grinding gap can be adjusted independently using the lower adjustment device, without affecting the upper rotating shaft. Therefore, this invention's dual-axis linkage coffee grinder with independent up-and-down adjustment achieves dual-axis linkage, a dual-blade design, and independent up-and-down adjustment. This allows for independent adjustment of the grinding gap between the two blade sets, enabling users to freely adjust the coarseness of the grind and achieve the desired coffee flavor for different users. Attached Figure Description

[0029] Figure 1 This is a front view of one embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0030] Figure 2 This is a cross-sectional view of one embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0031] Figure 3 This is a first partial exploded view of an embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0032] Figure 4 This is a second partial exploded view of an embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0033] Figure 5 This is a third partial exploded view of an embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0034] Figure 6 This is a fourth partial exploded view of an embodiment of a dual-axis linkage coffee bean grinder with independent up-and-down adjustment according to the present invention;

[0035] Figure 7This is a perspective view of the upper grinding core of another embodiment of a dual-axis linkage coffee bean grinder with independent upper and lower adjustment according to the present invention.

[0036] The following components are labeled in the diagram: 1. Hand crank, 2. Hand-tightening positioning screw, 3. Flat fixing component, 4. Upper inner adjuster, 5. Upper outer adjustment dial, 6. Upper outer adjustment ring, 7. Upper inner fine adjustment nut, 8. Upper inner fine adjustment positioning plate, 9. First bearing, 10. Upper outer adjustment ring bracket, 11. Upper rotating shaft, 121. Second bearing, 122. Third bearing, 123. Fourth bearing, 124. Fifth bearing, 13. Upper main body, 141. First stainless steel washer, 142. Second stainless steel washer, 151. First return spring, 152. Second return spring, 16. Upper tool assembly tool holder, 17. Upper tool assembly tool holder positioning screw, 18. Upper... Grinding disc, 19. Upper grinding disc cover, 20. Hex socket positioning screw, 21. Snap ring, 22. Upper grinding core, 23. Upper locking blade washer, 24. Locking blade nut, 25. Positioning ball, 26. Lower rotating shaft, 27. Lower main body, 28. Lower main body positioning screw, 29. Lower grinding disc cover, 30. Lower grinding disc positioning pin, 31. Lower grinding disc, 32. Lower blade assembly holder, 33. Lower blade assembly rotating bracket, 34. Rotating bracket positioning screw, 35. Lower outer adjusting ring, 36. Lower outer adjusting ring bracket, 37. Lower grinding core, 38. Lower locking blade washer, 39. Lower inner adjuster, 40. Upper powder cup, 41. Lower inner micro-adjustment nut, 42. Filter screen, 43. Lower powder cup. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] This invention provides a dual-axis linkage coffee bean grinder with independent vertical adjustment, comprising a drive component, an upper body 13, a lower body 27, and a coffee powder container arranged sequentially from top to bottom. The upper body 13 is equipped with an upper rotating shaft 11, an upper adjustment device for adjusting the vertical position of the upper rotating shaft 11, an upper grinding core 22, and an upper grinding disc 18. The upper grinding core 22 is mounted on the upper rotating shaft 11, and an upper grinding gap is formed between the upper grinding core 22 and the upper grinding disc 18. It should be understood that the upper grinding core 22 rotates or moves up and down with the upper rotating shaft 11, and the size of the upper grinding gap changes accordingly when the upper grinding core 22 moves up and down with the upper rotating shaft 11 to adjust its position.

[0039] The lower body 27 is equipped with a lower rotating shaft 26, a lower grinding core 37, a lower grinding disc 31, and a lower adjustment device. The lower rotating shaft 26 is coaxial with the upper rotating shaft 11. The lower end of the upper rotating shaft 11 is connected to the upper end of the lower rotating shaft 26 and drives the lower rotating shaft 26 to rotate. The lower end of the upper rotating shaft 11 can move up and down relative to the upper end of the lower rotating shaft 26. A lower grinding gap is formed between the lower grinding core 37 and the lower grinding disc 31. The lower grinding core 37 is mounted on the lower rotating shaft 26. The lower adjustment device is used to adjust the size of the lower grinding gap. It should be understood that the lower grinding core 37 rotates as the lower rotating shaft 26 rotates.

[0040] When grinding coffee beans using this invention, the drive unit drives the upper rotating shaft 11 to rotate, and the upper rotating shaft 11 can drive the lower rotating shaft 26 to rotate, so that the two sets of blades can work to grind the coffee beans twice.

[0041] Compared with existing technologies, this invention provides a dual-axis linkage coffee bean grinder with independent vertical adjustment, offering the following advantages: By setting the upper and lower rotating shafts on the same axis, a drive unit can drive the upper rotating shaft to rotate, which in turn drives the lower rotating shaft to rotate, thereby achieving the rotation of the upper and lower grinding cores. Furthermore, the upper rotating shaft can also move vertically relative to the lower rotating shaft, allowing adjustment of the upper grinding gap simply by adjusting the vertical position of the upper rotating shaft (equivalent to adjusting the vertical position of the upper grinding core, i.e., adjusting the size of the upper grinding gap). The up-and-down movement of the upper and lower blades does not affect the lower rotating shaft, thus achieving both dual-axis linkage and independent adjustment of the upper grinding gap. The lower grinding gap can be adjusted independently using the lower adjustment device, without affecting the upper rotating shaft. Therefore, this invention's dual-axis linkage coffee grinder with independent up-and-down adjustment achieves dual-axis linkage, a dual-blade design, and independent up-and-down adjustment. This allows for independent adjustment of the grinding gap between the two blade sets, enabling users to freely adjust the coarseness of the grind and achieve the desired coffee flavor for different users.

[0042] Specifically, the upper adjustment device includes at least one of the following: upper inner adjuster 4, upper inner fine-adjustment nut 7, and upper outer adjustment ring 6. That is, the upper adjustment device can be any one, any two, or all three of the above three. The upper inner adjuster 4, upper inner fine-adjustment nut 7, and upper outer adjustment ring 6 are all used to adjust the vertical position of the upper rotating shaft 11.

[0043] The present invention may also include a hand-tightening positioning screw 2 and a flat fixing member 3. The flat fixing member 3 is provided with a transverse through hole and is assembled and connected to the driving member. The hand-tightening positioning screw 2 passes through the driving member and is screwed to the upper end of the upper rotating shaft 11.

[0044] Preferably, the upper inner adjuster 4 is screwed to the upper rotating shaft 11, and the upper inner adjuster 4 is rotatably mounted on the flat fixing member 3.

[0045] Preferably, the upper inner fine-adjustment nut 7 is screwed to the upper rotating shaft 11, and the upper inner fine-adjustment nut 7 is located below the upper inner adjuster 4.

[0046] In addition, the present invention may also include an upper outer adjusting ring bracket 10, an upper outer adjusting ring 6 being screwed to the upper outer adjusting ring bracket 10, and the upper outer adjusting ring bracket 10 being connected to the upper rotating shaft 11.

[0047] Specifically, the lower adjustment device includes at least one of the following: lower inner adjuster 39, lower inner fine-adjustment nut 41, and lower outer adjustment ring 35. That is, the lower adjustment device can be any one, any two, or all three of the above three. The lower inner adjuster 39 and the lower inner fine-adjustment nut 41 are both used to adjust the vertical position of the lower grinding core 37 on the lower rotating shaft 26, while the lower outer adjustment ring 35 is used to adjust the vertical position of the lower grinding disc 31. In other words, the lower adjustment device adjusts the size of the lower grinding gap by adjusting the vertical position of the lower grinding core 37 or the lower grinding disc 31.

[0048] Preferably, the lower inner adjuster 39 is screwed to the lower end of the lower rotating shaft 26, and the lower grinding core 37 is locked downward by the lower locking washer 38 to the lower inner adjuster 39.

[0049] Preferably, the lower inner fine adjustment nut 41 is screwed to the lower end of the lower rotating shaft 26, the lower grinding core 37 is locked downward by the lower locking washer 38 to the lower inner fine adjustment nut 41, and the cross-sectional area of ​​the lower inner adjuster 39 is larger than the cross-sectional area of ​​the lower inner fine adjustment nut 41.

[0050] Furthermore, the lower grinding disc 31 is disposed within the lower tool assembly holder 32, and the lower outer adjusting ring 35 is screwed to the outside of the lower tool assembly holder 32. Further, the lower tool assembly holder 32 is disposed within the lower tool assembly rotating bracket 33, and the lower tool assembly rotating bracket 33 is screwed to the inside of the lower main body 27 for fixation.

[0051] The aforementioned driving component can be a hand crank 1. When grinding is required, the user operates the hand crank 1 to drive the upper rotating shaft 11 and the lower rotating shaft 26 to rotate. The hand crank 1 can be made of stainless steel. Of course, an electric driving component can also be used, and there are no further restrictions here.

[0052] Preferably, the upper rotating shaft 11 is provided with a first return spring 151, and the lower rotating shaft 26 is provided with a second return spring 152.

[0053] The structure of the dual-axis linkage upper and lower independent adjustment coffee bean grinder of this embodiment will be described in detail below. The upper adjustment device of this embodiment includes an upper inner adjuster 4, an upper inner micro-adjustment nut 7, and an upper outer adjustment ring 6. The lower adjustment device of this embodiment includes a lower inner adjuster 39, a lower inner micro-adjustment nut 41, and a lower outer adjustment ring 35.

[0054] Regarding the component structure of the upper internal adjuster in this embodiment: from top to bottom, there are a hand-tightening positioning screw 2, a flat fixing part 3, a hand crank 1, an upper internal adjuster 4, and an upper rotating shaft 11. The flat fixing part 3 has a horizontal through hole for assembly and connection with the hand crank 1. The flat fixing part 3 also has a vertical through hole for screwing the hand-tightening positioning screw 2 to the upper rotating shaft 11. The upper internal adjuster 4 is rotatably mounted on the flat fixing part 3 and is screwed to the upper rotating shaft 11. By rotating the upper internal adjuster 4, the user can make the upper rotating shaft 11 move up and down to drive the upper grinding core 22 to move up and down synchronously, that is, adjust the size of the upper grinding gap to freely adjust the coarseness of the ground coffee beans.

[0055] Regarding the component structure of the upper outer adjusting ring and the upper inner micro-adjusting nut in this embodiment: from top to bottom, there are an upper outer adjusting scale 5, an upper outer adjusting ring 6, an upper inner micro-adjusting nut 7, an upper inner micro-adjusting positioning plate 8, an upper outer adjusting ring bracket 10, an upper body 13, and an upper rotating shaft 11. The bottom of the upper outer adjusting scale 5 is threaded and screwed to the top of the upper body 13. In addition, the outer side of the upper outer adjusting scale 5 is provided with an adjustment scale so that the user can identify the adjustment scale and grinding coarseness direction of the upper outer adjusting ring. The inner side of the upper outer adjusting ring 6 is threaded and screwed to the outer side of the upper outer adjusting ring bracket 10. The upper outer adjusting ring bracket 10 is provided with a vertical through-hole groove from top to bottom, on which the upper inner micro-adjusting nut 7, the upper inner micro-adjusting positioning plate 8, and the first bearing 9 are screwed to the upper rotating shaft 11 in sequence. When adjusting using the upper outer adjusting ring 6, the user rotates the upper outer adjusting ring 6 clockwise or counterclockwise, causing the upper outer adjusting ring bracket 10 to rise and fall, which in turn drives the upper grinding core 22, which is fastened to the upper rotating shaft 11, to rise and fall, thereby adjusting the size of the upper grinding gap. When adjusting using the upper inner micro-adjusting nut 7, the user rotates the upper inner micro-adjusting nut 7, causing the upper rotating shaft 11 to rise and fall, which in turn drives the upper grinding core 22 to achieve a more precise fine adjustment of the grinding coarseness.

[0056] Furthermore, the upper rotating shaft 11 is fitted and assembled from top to bottom with a hand crank 1, a hand-tightening positioning screw 2, a flat fixing piece 3, an upper inner adjuster 4, an upper inner micro-adjustment nut 7, an upper inner micro-adjustment positioning plate 8, a first bearing 9, a second bearing 121, a third bearing 122, a first stainless steel washer 141, a first return spring 151, a retaining ring 21, an upper tool assembly tool holder 16, an upper tool assembly tool holder positioning screw 17, an upper grinding disc 18, an upper grinding disc cover 19, and an internal hexagonal positioning screw 20 tightened inside the upper grinding disc cover 19, an upper grinding core 22, an upper locking washer 23, and a locking nut 24. The locking nut 24 is fixed to the bottom of the upper rotating shaft 11 by an external thread screw connected to the bottom of the upper rotating shaft 11.

[0057] Regarding the component structure of the lower outer adjusting ring in this embodiment: from top to bottom, it includes an upper body 13, a lower body 27 and a lower body positioning screw 28 tightened inside the lower body 27, a lower grinding disc cover 29 and an internal hexagon positioning screw 20 tightened inside the lower grinding disc cover 29, a lower grinding disc positioning pin 30, a lower grinding disc 31, a lower blade assembly holder 32, a lower blade assembly rotating bracket 33 and a rotating bracket positioning screw 34 tightened inside the lower blade assembly rotating bracket 33, a lower outer adjusting ring 35, a lower outer adjusting ring bracket 36 and an internal hexagon positioning screw 20 tightened inside the lower outer adjusting ring bracket 36. When adjusting using the lower outer adjusting ring 35, the user rotates the lower outer adjusting ring 35 clockwise or counterclockwise to drive the external thread of the lower blade assembly holder 32, causing the lower grinding disc 31 to rise and fall, thus adjusting the size of the lower grinding gap and achieving free adjustment of the grinding coarseness.

[0058] Regarding the component structure of the lower inner adjuster and lower inner fine-adjustment nut in this embodiment: The lower rotating shaft 26 is sequentially fitted with a fourth bearing 123, a fifth bearing 124, a second stainless steel washer 142, a second return spring 152, a lower grinding core 37, a lower locking washer 38, a lower inner fine-adjustment nut 41, and a lower inner adjuster 39 from top to bottom. The lower inner adjuster 39 is fixed to the bottom of the lower rotating shaft 26 by an external thread screw connection. When adjusting using the lower inner adjuster 39, the user rotates the lower inner adjuster 39, thereby using the thread at the bottom of the lower rotating shaft to move the lower grinding core 37 up and down, thus freely adjusting the coarseness of the ground coffee beans. When adjusting using the lower inner fine-adjustment nut 41, the user rotates the lower inner fine-adjustment nut 41, thereby using the thread at the bottom of the lower rotating shaft to move the lower grinding core 37 up and down, thus freely adjusting the coarseness of the ground coffee beans for a deeper fine-tuning.

[0059] It is understood that the upper adjustment device in this embodiment includes an upper inner adjuster, an upper inner micro-adjustment nut, and an upper outer adjustment ring, while the lower adjustment device in this embodiment includes a lower inner adjuster, a lower inner micro-adjustment nut, and a lower outer adjustment ring. This achieves dual micro-adjustment functions, solves the problem of the coarseness of coffee beans ground twice by different users, makes the coffee beans ground more uniform, greatly reduces residual powder, improves the extraction rate, avoids the bitter taste caused by over-extraction, and can meet the coffee taste pursued by various users.

[0060] Of course, in other embodiments, the upper adjusting device + lower adjusting device can also be combined in the following ways: upper inner adjusting device + lower inner adjusting device, upper inner adjusting device + lower inner fine adjusting nut, upper inner adjusting device + lower outer adjusting ring, upper inner fine adjusting nut + lower inner adjusting device, upper inner fine adjusting nut + lower inner fine adjusting nut, upper inner fine adjusting nut + lower outer adjusting ring, upper outer adjusting ring + lower inner adjusting device, upper outer adjusting ring + lower inner fine adjusting nut, upper outer adjusting ring + lower outer adjusting ring, upper inner adjusting device + upper inner fine adjusting nut + lower inner adjusting device, upper inner adjusting device + upper inner fine adjusting nut + lower inner fine adjusting nut, upper inner adjusting device + upper inner fine adjusting nut + lower outer adjusting ring, upper inner adjusting device + upper outer adjusting ring + lower inner adjusting device, upper... Inner adjuster + upper outer adjusting ring + lower inner fine adjusting nut, upper inner adjuster + upper outer adjusting ring + lower outer adjusting ring, upper inner fine adjusting nut + upper outer adjusting ring + lower inner adjuster, upper inner fine adjusting nut + upper outer adjusting ring + lower inner fine adjusting nut, upper inner fine adjusting nut + upper outer adjusting ring + lower outer adjusting ring, upper inner adjuster + upper inner fine adjusting nut + upper outer adjusting ring + lower inner adjusting nut, upper inner adjuster + upper inner fine adjusting nut + upper outer adjusting ring + lower inner adjusting nut, upper inner adjuster + lower inner adjuster + lower inner fine adjusting nut, upper inner adjuster + lower inner adjuster + lower outer adjusting ring, upper inner adjuster + lower inner fine adjusting nut + lower outer adjusting ring, upper inner adjuster + lower inner fine adjusting nut + lower outer adjusting nut Ring, upper inner adjuster + lower inner adjuster + lower inner fine-adjusting nut + lower outer adjusting ring, upper inner fine-adjusting nut + lower inner adjuster + lower inner fine-adjusting nut, upper inner fine-adjusting nut + lower inner adjuster + lower outer adjusting ring, upper inner fine-adjusting nut + lower inner fine-adjusting nut + lower outer adjusting ring, upper inner fine-adjusting nut + lower inner adjuster + lower inner fine-adjusting nut + lower outer adjusting ring, upper outer adjusting ring + lower inner adjuster + lower inner fine-adjusting nut + lower outer adjusting ring, upper outer adjusting ring + lower inner adjuster + lower inner fine-adjusting nut + lower outer adjusting ring, upper inner adjuster + upper inner fine-adjusting nut + lower inner adjuster + lower outer adjusting ring, upper inner adjuster + upper inner fine-adjusting nut + lower inner adjuster + lower inner fine-adjusting nut, upper inner adjuster The combinations of upper and lower adjustment devices, such as regulator + upper inner fine-adjustment nut + lower inner adjuster + lower outer adjustment ring, upper inner adjuster + upper inner fine-adjustment nut + lower inner fine-adjustment nut + lower outer adjustment ring, upper inner adjuster + upper inner fine-adjustment nut + lower inner adjuster + lower outer adjustment ring, upper inner fine-adjustment nut + upper outer adjustment ring + lower inner adjuster + lower inner fine-adjustment nut, upper inner fine-adjustment nut + upper outer adjustment ring + lower inner adjuster + lower outer adjustment ring, upper inner fine-adjustment nut + upper outer adjustment ring + lower inner fine-adjustment nut + lower outer adjustment ring, and upper inner fine-adjustment nut + upper outer adjustment ring + lower inner adjuster + lower inner fine-adjustment nut + lower outer adjustment ring, are all adapted to user needs and are not subject to excessive restrictions here.

[0061] Specifically, the lower end of the upper rotating shaft 11 is provided with a non-circular cross-section insertion protrusion, and the upper end face of the lower rotating shaft 26 is provided with an insertion groove corresponding to the insertion protrusion. The insertion protrusion is inserted into the insertion groove so that the lower end of the upper rotating shaft 11 can move up and down relative to the upper end of the lower rotating shaft 26. Preferably, the cross-section of the insertion protrusion is hexagonal, and the corresponding insertion groove is hexagonal. Of course, other shapes can also be used, and no further restrictions are imposed here.

[0062] In addition, positioning beads 25 can be provided on both sides of the upper end of the lower rotating shaft 26, and sliding grooves corresponding to the positioning beads 25 can be provided on both sides of the lower end of the upper rotating shaft 11. The positioning beads 25 are set in the sliding grooves so that the lower end of the upper rotating shaft 11 can move up and down relative to the upper end of the lower rotating shaft 26. Alternatively, the positioning beads 25 can be set on the upper rotating shaft 11 and the sliding grooves can be set on the lower rotating shaft. Of course, other structures can also be used to achieve the vertical movement of the lower end of the upper rotating shaft 11 relative to the upper end of the lower rotating shaft 26. There are no major restrictions here.

[0063] Furthermore, in this embodiment, both the upper grinding core 22 and the lower grinding core 37 are conical; such as Figure 7 As shown, the upper grinding core 22 and the upper grinding disc 18, and the lower grinding core 37 and the lower grinding disc 31 can also adopt other shapes and structures such as flat knives, and no further restrictions are imposed here.

[0064] Preferably, the coffee powder container is installed at the lower end of the lower body 27 via a threaded connection for easy disassembly and assembly. Preferably, the coffee powder container includes an upper powder cup 40 and a lower powder cup 43 arranged sequentially. A filter 42 is provided between the upper powder cup 40 and the lower powder cup 43. The upper powder cup 40 is used to hold coarser coffee powder, while the filter 42 filters the lower powder cup 43 to hold finer coffee powder, further meeting the needs of different users.

[0065] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-axis linkage coffee bean grinder with independent up-and-down adjustment, characterized in that, It includes a drive unit, an upper body, a lower body, and a coffee powder box arranged sequentially from top to bottom. The upper body is provided with an upper rotating shaft, an upper adjustment device for adjusting the up and down position of the upper rotating shaft, an upper grinding core, and an upper grinding disc. The upper grinding core is disposed on the upper rotating shaft, and an upper grinding gap is formed between the upper grinding core and the upper grinding disc. The lower body is provided with a lower rotating shaft, a lower grinding core, a lower grinding disc, and a lower adjustment device. The lower rotating shaft and the upper rotating shaft are on the same axis. The lower end of the upper rotating shaft is connected to the upper end of the lower rotating shaft and drives the lower rotating shaft to rotate. The lower end of the upper rotating shaft can move up and down relative to the upper end of the lower rotating shaft. A lower grinding gap is formed between the lower grinding core and the lower grinding disc. The lower grinding core is set on the lower rotating shaft. The lower adjustment device is used to adjust the size of the lower grinding gap. The upper adjustment device includes at least one of an upper inner adjuster, an upper inner fine adjustment nut, and an upper outer adjustment ring; The lower end of the upper rotating shaft is provided with a non-circular cross-section insertion protrusion, and the upper end face of the lower rotating shaft is provided with an insertion groove corresponding to the insertion protrusion, and the insertion protrusion is inserted into the insertion groove; or, the upper end of the lower rotating shaft is provided with positioning beads on both sides, and the lower end of the upper rotating shaft is provided with sliding grooves corresponding to the positioning beads on both sides, and the positioning beads are disposed in the sliding grooves.

2. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: It also includes a hand-tightening positioning screw and a flat fixing component. The flat fixing component has a transverse through hole and is assembled and connected to the driving component. The hand-tightening positioning screw passes through the driving component and is screwed to the upper end of the upper rotating shaft.

3. The dual-axis linkage independently adjustable coffee bean grinder according to claim 2, characterized in that: The upper inner adjuster is screwed to the upper rotating shaft, and the upper inner adjuster is rotatably mounted on the flat fixing member.

4. The dual-axis linkage independently adjustable coffee bean grinder according to claim 3, characterized in that: The upper inner fine-adjustment nut is screwed to the upper rotating shaft, and the upper inner fine-adjustment nut is located below the upper inner adjuster.

5. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: It also includes an upper outer adjusting ring bracket, wherein the upper outer adjusting ring is screwed to the upper outer adjusting ring bracket, and the upper outer adjusting ring bracket is connected to the upper rotating shaft.

6. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The lower adjustment device includes at least one of a lower inner adjuster, a lower inner fine-adjustment nut, and a lower outer adjustment ring.

7. The dual-axis linkage independently adjustable coffee bean grinder according to claim 6, characterized in that: The lower inner adjuster is screwed to the lower end of the lower rotating shaft, and the lower grinding core is locked downwards by the lower inner adjuster.

8. The dual-axis linkage independently adjustable coffee bean grinder according to claim 7, characterized in that: The lower inner fine adjustment nut is screwed to the lower end of the lower rotating shaft, the lower grinding core is locked downwards by the lower inner fine adjustment nut, and the cross-sectional area of ​​the lower inner adjuster is larger than the cross-sectional area of ​​the lower inner fine adjustment nut.

9. The dual-axis linkage independently adjustable coffee bean grinder according to claim 6, characterized in that: The lower grinding disc is disposed inside the lower tool assembly holder, and the lower outer adjusting ring is screwed to the outside of the lower tool assembly holder.

10. The dual-axis linkage independently adjustable coffee bean grinder according to claim 9, characterized in that: The lower blade assembly holder is disposed inside the lower blade assembly rotating bracket, and the lower blade assembly rotating bracket is screwed and fixed to the interior of the lower main body.

11. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The driving component is a hand crank.

12. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The cross-section of the insertion protrusion is hexagonal, and correspondingly, the insertion groove is hexagonal.

13. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: Both the upper and lower grinding cores are conical.

14. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: Both the upper grinding core and the upper grinding disc are flat blades.

15. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The coffee powder cartridge is installed at the lower end of the lower body via a threaded connection.

16. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The coffee powder container includes an upper powder cup and a lower powder cup arranged vertically, with a filter screen between the upper and lower powder cups.

17. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: The upper rotating shaft is equipped with a first return spring.

18. The dual-axis linkage independently adjustable coffee bean grinder according to claim 1, characterized in that: A second return spring is provided on the lower rotating shaft.

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