Gear-adjustable electric bean grinder

Abstract

The utility model discloses a gear-adjustable electric bean grinder which comprises a main machine shell, a fixed motor fixedly arranged on the main machine shell, a driving rod axially connected with an output shaft of the motor in a sliding mode, a first grinding disc connected with the driving rod and a second grinding disc arranged in the main machine shell and matched with the first grinding disc for grinding. The upper end of the main machine shell is rotationally connected with an adjusting knob, a bean inlet channel allowing beans to pass through is formed between the inner wall of the main machine shell and the motor, an opening is formed in the main machine shell and communicated with the bean inlet channel, a lifting rod is arranged in the main machine shell, and one end of the lifting rod is matched with the adjusting knob through a linkage assembly. One end of the lifting rod is connected with the main machine shell, the other end of the lifting rod is connected with the driving rod, the adjusting knob drives the lifting rod to move up and down relative to the main machine shell through the linkage assembly, when the lifting rod moves up and down, the gap between the first grinding disc and the second grinding disc changes, and the electric bean grinder is simple in structure, good in use stability and high in adjusting precision.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee bean grinder equipment, in particular to an electric coffee bean grinder with adjustable gear positions. Background Art

[0002] Coffee beans can be ground into powder by using a grinder. However, due to different preferences of different consumer groups for the coarseness of the powder, there is a need for grinding adjustment to grind into powders of different coarseness and fineness. Currently, there are many types of grinders on the market, and electric coffee grinders are gradually becoming the mainstream. However, since electric grinders need to use a motor to drive the grinding wheel to work, the internal structure is relatively complex.

[0003] There are two more common types of electric coffee bean grinders on the market that can adjust the coarseness of the powder. One is a downward-adjustable coffee bean grinder, which adjusts the position of the movable blade disc by rotating an adjustment knob that is threadedly connected to the mounting shaft. The adjustment knob is set at the lower end of the movable blade disc, which makes the coarseness adjustment operation inconvenient to use.

[0004] In order to overcome the above problems, an upward-adjustable coffee grinder has been developed in the prior art. The upward-adjustable coffee grinder has an upper adjusting knob, which is threadedly connected to the outer shell. The adjusting knob and the motor mounting frame are in conflict with each other. The motor mounting frame and the movable blade disc connected thereto are driven to move up and down by rotating the adjusting knob. Although the upward-adjustable coffee grinder has solved the technical defect of the inconvenient adjustment operation of the downward-adjustable coffee grinder, the motor needs to be driven up and down together with the adjusting knob when adjusting. Therefore, the motor mounting frame needs to be set as a movable structure. The motor moves with the grinding disc. The movement of the motor causes fatigue to the adjusting structure and gradually shifts its position, affecting the stability of the coarseness of the ground beans. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an electric coffee grinder with a simple structure and good stability, and to improve the adjustment accuracy so that it has stronger market competitiveness. To achieve the above purpose, the present invention provides the following technical solutions:

[0006] On the one hand, the utility model provides an adjustable gear type electric coffee bean grinder, comprising a main body shell, a motor fixedly arranged in the main body shell, a driving rod axially slidingly connected to the output shaft of the motor, and a first grinding disc connected to the driving rod, and a second grinding disc cooperating with the first grinding disc for grinding is also arranged in the main body shell, an adjusting knob is rotatably connected to the upper end of the main body shell, and a bean feeding channel for passing beans is formed between the inner wall of the main body shell and the motor, an opening is arranged at the upper end or the side end of the main body shell, and the opening and the bean feeding channel are mutually connected, a lifting rod is arranged in the main body shell, one end of the lifting rod cooperates with the adjusting knob through a linkage component, and the other end is connected to the driving rod, and the adjusting knob drives the lifting rod to move up and down relative to the main body shell through the linkage component, and when the lifting rod moves up and down, the gap between the first grinding disc and the second grinding disc changes.

[0007] As a further improvement of the present invention, the lifting rod is provided with threads, the linkage assembly includes a driving nut threadedly connected to the lifting rod, and the adjusting knob drives the driving nut to rotate to drive the lifting rod to move axially.

[0008] As a further improvement of the utility model, the adjusting knob is fixed to the driving nut, the driving nut is threadedly sleeved on the lifting rod, the lifting rod is provided with an axially opened through hole, the lifting rod is coaxially sleeved on the outside of the motor, the motor is fixedly connected to the main body housing through a mounting seat, and the lifting rod is provided with an avoidance groove for the mounting seat to pass through.

[0009] As a further improvement of the utility model, the adjusting knob is provided with an inner gear ring, the driving nut is provided with an outer gear ring, and the linkage assembly further includes a reduction gear meshing with the adjusting knob and the driving nut.

[0010] As a further improvement of the present invention, a zero adjustment nut is provided at the upper end of the lifting rod, and the zero adjustment nut is used to indicate the height position or reference position of the lifting rod.

[0011] As a further improvement of the present invention, the upper end of the zero adjustment nut forms a conical surface that matches the opening, and the conical surface is a guiding inclined surface that guides the beans into the bean inlet channel.

[0012] As a further improvement of the present invention, the adjusting knob is provided with an adjusting scale indication, and the adjusting scale indication is distributed circumferentially at 300°-360°.

[0013] As a further improvement of the utility model, the lifting rod includes a connecting seat, and the connecting seat is provided with a bearing for rotatingly sleeved with the driving rod.

[0014] As a further improvement of the utility model, a second grinding disc mounting seat is arranged in the main engine shell, and the second grinding disc mounting seat includes an upper seat and a lower seat, and a accommodating groove for the second grinding disc with upper and lower limits is formed between the upper seat and the lower seat. A stabilizing frame is also arranged in the main engine shell, and the stabilizing frame is arranged below the connecting seat of the lifting rod. The driving rod is sleeved in the stabilizing frame, and the stabilizing frame is provided with a bearing. The driving rod and the bearing are slidably arranged, and the upper seat and the stabilizing frame are formed as one piece.

[0015] As a further improvement of the utility model, the lower seat is provided with a powder outlet guide ring, the inner side surface of the guide ring is an arc surface radially expanding from top to bottom, and the lower end surface of the lower seat is provided with an installation groove for connecting to the powder receiving box, and the position of the installation groove is higher than the powder outlet guide ring.

[0016] As a further improvement of the utility model, a thrust spring is installed between the first grinding disc and the driving rod, and a flange is provided at the lower section of the driving rod, and the upper end surface of the flange and the upper end surface of the first grinding disc and the thrust spring are in conflict with each other.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] By adopting the above technical solution, the utility model has the following advantages:

[0019] 1. The motor is fixed in the main body housing, and the adjustment knob is set at the upper end of the main body housing. The linkage assembly is used to convert the rotational motion into the lifting motion of the lifting rod. The lifting rod drives the first grinding disc to move and adjust. The adjustment structure skips the motor to avoid the zero position offset of the grinding disc caused by the motor after long-term use, thereby facilitating the grinding disc adjustment operation while taking into account the stability of the grinder during operation, and the adjustment eliminates the accumulated errors in various aspects;

[0020] 2. The motor and the adjustment knob are both set on the main body housing, the linkage component is set as the driving nut, the lifting rod is controlled by threaded connection, and the lifting rod is controlled by multiple turns of thread. The adjustment knob can be set with more multi-level adjustment gears, which greatly improves the adjustment accuracy;

[0021] 3. An opening is opened in the main body shell, and a bean inlet channel is formed on the inner wall of the main body shell. The internal space of the main body shell can be reasonably utilized to form a bean storage space. There is no need to set up an additional bean storage space on the machine body, which makes the overall size of the grinder smaller and the structure simpler. The opening is further set at the upper part of the main body shell. This design allows beans to be added directly from the top, which is more portable in use and conforms to ergonomics and user habits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic cross-sectional view of the structure of one embodiment of the utility model;

[0023] Figure 2 A schematic cross-sectional view of another embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the second grinding disc mounting seat in one embodiment of the utility model.

[0025] Figure numerals: 1. Main body housing; 2. Powder receiving box; 3. Motor; 4. Mounting seat; 5. Driving rod; 6. Adjusting knob; 7. Zeroing nut; 8. Lifting rod; 9. Connecting seat; 10. Bearing; 11. First grinding disc; 12. Second grinding disc; 13. Thrust spring; 14. Driving nut; 15. Reduction gear; 16. Opening; 17. Bean feeding channel; 18. Second grinding disc mounting seat; 19. Upper seat; 20. Lower seat; 21. Powder outlet guide retaining ring; 22. Mounting groove; 23. Stabilizing frame. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0027] One specific implementation example is Figure 1-3 As shown, an adjustable gear type electric coffee grinder, the overall shell includes a main body shell 1 and a powder box 2 arranged below the main body shell 1, a motor 3 and a battery are fixedly arranged in the main body shell 1, and an integral mounting seat 4 is preferably arranged inside the main body shell 1, and the motor 3 and the battery are fixedly arranged on the main body shell 1 through the mounting seat 4 through fasteners, and a second grinding disc mounting seat 18 is also arranged below the main body shell 1, and the second grinding disc 12 is fixedly mounted on the second grinding disc mounting seat 18 as a fixed grinding disc, and the output shaft of the motor 3 is axially slidably connected to the driving rod 5, and the driving rod 5 can be arranged as a polygonal column and inserted into the output shaft interface of the motor 3 to limit its rotation, and the lower end of the driving rod 5 is connected to the first grinding disc 11, and the first grinding disc 11 is used as a movable grinding disc to cooperate with the second grinding disc 12 to grind the material.

[0028] The upper end of the main body shell 1 is rotatably connected with an adjusting knob 6, and the adjusting knob 6 is provided with an adjusting scale indication, and the adjusting scale indication is circumferentially distributed at 300-360°. As a specific implementation, the adjusting scale indication is distributed on the adjusting knob at 355°. A lifting rod 8 is arranged in the main body shell, and the lifting rod 8 can be arranged as a sleeve rod coaxially arranged with the motor 3, or can be eccentrically arranged. One end of the lifting rod 8 cooperates with the adjusting knob 6 through a linkage component. The lifting rod 8 includes a connecting seat 9, which is connected to the driving rod 5 through the connecting seat 9. A bearing 10 is arranged on the connecting seat 9, and the driving rod 5 is rotatably sleeved in the bearing 10. The adjusting knob 6 drives the lifting rod 8 to move up and down through the linkage component. When the lifting rod 8 moves up and down, the gap between the first grinding disc 11 and the second grinding disc 12 changes, thereby changing the powder output coarseness of the grinder, thereby solving the defect that the adjusting structure in the prior art drives the motor to move together, causing fatigue to the adjusting structure and gradually shifting the position to affect the stability of the powder output coarseness of the ground beans.

[0029] A thrust spring 13 is installed between the first grinding disc 11 and the driving rod 5. A flange is provided at the lower section of the driving rod 5. The upper end surface of the flange and the upper end surface of the first grinding disc 11 and the thrust spring 13 are in conflict with each other. By arranging the thrust spring 13 between the driving rod 5 and the first grinding disc 11, a strong and direct thrust can be provided. The driving rod 5 and the first grinding disc 11 do not rotate relative to each other, thereby avoiding friction loss of the thrust spring 13 due to rotation.

[0030] The adjusting knob 6 is rotatably connected to the main body housing 1 , and the main body housing 1 limits the adjusting knob 6 from coming out through a limiting member.

[0031] like Figure 1 As shown, a specific embodiment of the linkage component, the linkage component is a driving nut 14, the adjusting knob 6 and the driving nut 14 are fixedly connected by connecting ribs, and the driving nut 14 is threadedly connected to the lifting rod 8. When the adjusting knob 6 and the driving nut 14 are rotated, the lifting rod 8 is driven to move up and down, and the lifting rod 8 is provided with an axially opened through hole. The lifting rod 8 is coaxially sleeved on the outside of the motor 3. The lifting rod 8 is provided with an avoidance groove for the mounting seat 4 to pass through. The rotation of the lifting rod 8 can be limited by the avoidance groove, and a slider and a slide groove can also be provided on the lifting rod 8 and the main shell to limit the rotation of the lifting rod 8.

[0032] like Figure 2As shown, another specific embodiment of the linkage assembly, the linkage assembly includes a driving nut 14 and a reduction gear 15, the adjusting knob 6 is provided with an inner gear ring, and the driving nut 14 is provided with an outer gear ring, the reduction gear 15 is rotatably set between the adjusting knob 6 and the driving nut 14 to engage with each other, and the driving nut 14 is abutted against the reduction gear 15 mounting seat 4. By setting the reduction gear 15, the pitch setting of the driving nut 14 and the lifting rod 8 is smaller, which is smoother during the adjustment process, and the number of adjustment rotations of the driving nut is increased, which significantly improves the adjustment accuracy, and solves the problem that the lifting member is directly adjusted by the adjusting member in the prior art, and the adjustment accuracy is not high due to the limited rotation angle and number of rotations of the adjusting member.

[0033] An opening 16 is provided above the main housing, and the opening can be provided at the upper end of the adjusting knob, or the adjusting knob can be detachably connected, and beans can be added after the adjusting knob is removed, or an opening is provided on the side of the main housing. Preferably, an opening 16 is provided in the center of the adjusting knob 6, and the upper top surface of the adjusting knob 6 is bent downward toward the center to form a funnel portion, which better guides the falling of the bean material. The funnel portion and the rotating portion of the adjusting knob can be provided separately, and are preferably integrally formed and fixed. The adjusting knob 6 extends downward at the position of the opening 16 to form a first retaining ring, which can prevent the bean material from bouncing out to a certain extent. The inner wall of the main housing 1 and the outer wall of the motor 3 and the battery form a bean inlet channel 17 for the bean material to pass through, and the opening 16 and the bean inlet channel 17 are interconnected to form a larger volume of bean storage space.

[0034] like Figure 3 As shown, a second grinding disc mounting seat 18 is arranged in the main engine housing 1, and the second grinding disc mounting seat 18 includes an upper seat 19 and a lower seat 20, and a receiving groove for the second grinding disc 12 with upper and lower limits is formed between the upper seat 19 and the lower seat 20, and the upper seat 19 is formed with a guiding cone surface with a closed lower end above the receiving groove, and the lower seat 20 is fixed on the main engine housing 1, and the lower seat 20 is provided with a powder outlet guide retaining ring 21, and the inner side surface of the guide retaining ring is a circular arc surface radially expanded from top to bottom, and the lower end surface of the lower seat 20 is provided with a mounting groove 22 for connecting with the powder receiving box 2, and the position of the mounting groove 22 is higher than the powder outlet guide retaining ring 21, and the powder outlet guide retaining ring 21 guides the powder outlet to reduce the flying powder in the powder falling process, and can effectively prevent the ground powder from flying out to the connection between the powder receiving box 2 and the lower seat 20, and reduce the residual powder amount.

[0035] The powder receiving box 2 and the lower seat 20 may be connected in a threaded connection, a sealed connection or a clamping connection.

[0036] Preferably, a stabilizing frame 23 is further provided in the main body shell, and the stabilizing frame 23 is provided below the connecting seat 9 of the lifting rod 8, and the driving rod 5 is sleeved in the stabilizing frame 23. The stabilizing frame 23 includes bearings distributed up and down, and the driving rod 5 is slidably provided with the bearings. By providing the stabilizing frame 23, the driving rod is always kept coaxially arranged with the motor output shaft during the adjustment process.

[0037] Preferably, the stabilizing frame 23 is integrally formed with the upper seat 19, thereby avoiding the defects of low concentricity and parallelism between the first grinding disc 11 and the second grinding disc 12 caused by the cumulative tolerance of the secondary assembly, greatly improving the gap installation accuracy and coaxial accuracy between the first grinding disc 11 and the second grinding disc 12, and improving the uniformity of the coarseness of the powder produced by the ground bean particles.

[0038] Preferably, a zeroing nut 7 is provided at the upper end of the lifting rod 8, and the zeroing nut 7 is used to indicate the height position of the lifting rod 8. The zeroing nut 7 is threadedly connected to the lifting rod 8. The zeroing nut 7 is provided to prevent the lifting rod 8 from being over-adjusted and coming out. The initial position of the lifting rod 8 can be adjusted by rotating the zeroing nut 7 after assembly is completed to ensure that the gap between the first grinding disc 11 and the second grinding disc 12 is in the initial set position. The initial set gap is 0.05-0.5mm, so as to maintain a high consistency in the factory settings of each machine and solve the errors caused by assembly process and materials.

[0039] Further preferably, the upper end of the zero adjustment nut 7 forms a conical surface that cooperates with the opening 16 of the adjustment knob 6. The conical surface is a guiding slope for guiding the beans into the bean inlet channel 17, and plays a role in guiding the beans to fall into the bean inlet channel 17 to prevent the beans from getting stuck in the gap of the adjustment component.

[0040] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. An adjustable gear type electric coffee grinder, characterized in that: The invention comprises a main body shell (1), a motor (3) fixedly arranged in the main body shell (1), a driving rod (5) axially slidably connected to the output shaft of the motor (3), and a first grinding disc (11) connected to the driving rod (5); a second grinding disc (12) for grinding in cooperation with the first grinding disc (11) is also arranged in the main body shell (1); an adjusting knob (6) is rotatably connected to the upper end of the main body shell (1); a bean inlet channel (17) for passing beans is formed between the inner wall of the main body shell (1) and the motor (3); the main body shell An opening (16) is provided at the upper end or the side end of the body (1), and the opening (16) and the bean feeding channel (17) are mutually connected. A lifting rod (8) is provided in the main body shell (1), one end of the lifting rod (8) cooperates with the adjustment knob (6) through a linkage component, and the other end is connected to the driving rod (5). The adjustment knob (6) drives the lifting rod (8) to move up and down relative to the main body shell (1) through the linkage component. When the lifting rod (8) moves up and down, the gap between the first grinding disc (11) and the second grinding disc (12) changes.

2. The adjustable-gear electric coffee grinder according to claim 1, characterized in that: The lifting rod (8) is provided with a thread, and the linkage assembly comprises a driving nut (14) threadedly connected to the lifting rod (8). When the adjusting knob (6) drives the driving nut (14) to rotate, the lifting rod (8) is driven to move axially.

3. The adjustable-gear electric coffee grinder according to claim 2, characterized in that: The adjusting knob (6) is fixed to the driving nut (14), the driving nut (14) is threadedly sleeved to the lifting rod (8), the lifting rod (8) is provided with an axially opened through hole, the lifting rod (8) is coaxially sleeved on the outside of the motor (3), the motor (3) is fixedly connected to the main body housing (1) through the mounting seat (4), and the lifting rod (8) is provided with an avoidance groove for the mounting seat (4) to pass through.

4. The adjustable-gear electric coffee grinder according to claim 2, characterized in that: The adjusting knob (6) is provided with an inner toothed ring, the driving nut (14) is provided with an outer toothed ring, and the linkage assembly further comprises a reduction gear (15) meshing with the adjusting knob (6) and the driving nut (14).

5. The adjustable-gear electric coffee grinder according to claim 2, characterized in that: A zero adjustment nut (7) is arranged at the upper end of the lifting rod (8), and the zero adjustment nut (7) is arranged to indicate a reference position of the lifting rod (8).

6. The electric coffee bean grinder with adjustable gear position according to claim 5, characterized in that: The upper end of the zero adjustment nut (7) forms a conical surface that matches the opening (16), and the conical surface is a guiding inclined surface that guides the beans to enter the bean feeding channel (17).

7. The electric coffee bean grinder with adjustable gear position according to claim 1, characterized in that: The adjusting knob (6) is provided with an adjusting scale indication, and the adjusting scale indication is distributed in a circumferential direction of 300°-360°.

8. The electric coffee bean grinder with adjustable gear position according to claim 1, characterized in that: A second grinding disc mounting seat (18) is arranged in the main housing (1), and the second grinding disc mounting seat (18) comprises an upper seat (19) and a lower seat (20), and a receiving groove for the second grinding disc (12) with upper and lower limits is formed between the upper seat (19) and the lower seat (20). A stabilizing frame (23) is also arranged in the main housing, and the stabilizing frame (23) is arranged below the connecting seat (9) of the lifting rod (8). The driving rod (5) is sleeved in the stabilizing frame (23), and the stabilizing frame (23) is provided with a bearing. The driving rod (5) is slidably arranged with the bearing, and the upper seat (19) and the stabilizing frame (23) are integrally formed.

9. The electric coffee bean grinder with adjustable gear position according to claim 8, characterized in that: The lower seat (20) is provided with a powder outlet guide retaining ring (21), the inner side surface of the guide retaining ring is an arc surface that radially expands from top to bottom, and the lower end surface of the lower seat (20) is provided with a mounting groove (22) for connecting with the powder receiving box (2), and the position of the mounting groove (22) is higher than the powder outlet guide retaining ring (21).

10. The electric coffee bean grinder with adjustable gear position according to claim 1, characterized in that: A thrust spring (13) is installed between the first grinding disc (11) and the driving rod (5); a flange is provided at the lower section of the driving rod (5); the lower end surface of the flange and the upper end surface of the first grinding disc (11) and the thrust spring (13) are in contact with each other.

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