Coffee bean grinding device

Abstract

The utility model discloses a coffee bean grinding device which comprises an upper knife assembly, a powder mixing ring fixing piece, a knife rest powder mixing ring, a nut, a bean stirring piece, a conical knife, a powder sweeping blade assembly, a gear box, a long shaft, a bearing assembly, a gear A, a lock nut, a short shaft, a gear B, a gear box bottom plate, a motor, a steel sleeve, a bearing hardware pressing piece, a rivet and a gasket. The steel sleeve is fixed at the opening part of the gear box; the bearing hardware pressing sheet is fixed on the bottom plate of the gear box by using a rivet; the gear box bottom plate is fixed to the bottom of the gear box, and the long shaft is installed in the gear box through a bearing assembly. The gear B is sleeved on the short shaft; the gear A is sleeved at the lower end of the long shaft; the motor is fixed at the bottom of the bottom plate of the gear box through a screw; the gear B is meshed with the gear A; the long shaft is sleeved with the powder sweeping blade assembly, the conical knife and the bean stirring piece from bottom to top and fixed to the long shaft through nuts; the tool rest powder mixing ring is fixed to the gear box through a powder mixing ring fixing piece and a screw, and the upper tool assembly is rotationally buckled on the tool rest powder mixing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee bean grinding equipment, in particular to a device for grinding coffee beans. Background Art

[0002] At present, the coffee bean grinding devices of fully automatic / semi-automatic coffee machines on the market, such as Breville BES876 bean grinding press and Delonghi EC9335M bean grinding press, all use copper sleeves to tightly fix the long axis. This type of coffee bean grinding device makes a lot of noise during grinding, and the copper sleeves are easily worn out after long-term use, and have a short lifespan. At the same time, the ground coffee powder is uneven.

[0003] Therefore, there is still room for improvement in the prior art. Utility Model Content

[0004] The utility model aims to provide a device for grinding coffee beans, aiming to solve the technical problems that the copper sleeve used in the existing coffee bean grinding device is easy to wear, has a short service life, and the ground coffee powder is uneven.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a device for grinding coffee beans, which includes: an upper knife assembly, a powder adjusting ring fixing plate, a knife holder powder adjusting ring, a nut, a bean-pushing blade, a cone knife, a powder sweeping blade assembly, a gear box, a long shaft, a bearing assembly, a gear A, a locking nut, a short shaft, a gear B, a gear box bottom plate, a motor, a steel sleeve, a bearing hardware pressing sheet, a rivet and a gasket; the steel sleeve is fixed to the mouth of the gear box, and the bearing hardware pressing sheet is fixed to the gear box bottom plate by rivets; the gear box bottom plate is fixed to the bottom of the gear box, and the long shaft is installed in the gear box through the bearing assembly; The gear B is sleeved on the short shaft; the gear A is sleeved on the lower end of the long shaft and locked with a lock nut; the motor is fixed to the bottom of the gear box bottom plate with screws, and the motor drives the gear B to rotate, and the gear B is meshed with the gear A, and the long shaft is driven to rotate through the gear A; the powder sweeping blade assembly is sleeved on the long shaft; the conical knife passes through the long shaft and is installed on the powder sweeping blade assembly; the bean-moving blade is installed on the long shaft and fixed to the top of the conical knife by a nut; the powder adjusting ring of the tool holder is fixed to the gear box by screws with the powder adjusting ring fixing plate; the upper knife assembly is screwed on the powder adjusting ring of the tool holder.

[0006] Since bearing B is sleeved on the gear box bottom plate and fixed with bearing hardware pressing plates and rivets, the motor is fixed on the gear box bottom plate with screws, the gear box bottom plate is sleeved on the gear box, and the gear box bottom plate fixes the long axis and the short axis. The shaft on the motor drives gear B, and gear B drives gear A and the long axis to rotate. Bearings A, B, and C at the upper and lower ends of the long axis rotate synchronously, which reduces friction of the long axis, better transmits torque and axial positioning.

[0007] Since the powder sweeping blade assembly is sleeved on the long axis, the cone knife is stacked on the powder sweeping blade assembly and is rigidly fixed by nuts and bean-splitting blades to perform synchronous rotation. Since the upper knife assembly is screwed on the powder adjusting ring of the knife holder, the upper knife assembly can move up and down when the powder adjusting ring of the knife holder rotates, thereby adjusting the coarseness of the ground coffee powder.

[0008] A device for grinding coffee beans, wherein the bearing assembly includes: bearing A, bearing B and bearing C, wherein the bearing C and bearing A are sleeved in the countersunk holes of the gear box and supported by a bearing pressing ring in the middle; the bearing B is installed in the circular sink of the bottom plate of the gear box and is pressed by a bearing hardware pressing plate, and the bearing hardware pressing plate is fixed to the bottom plate of the gear box by four rivets; the gear B is sleeved on the short shaft for rotational movement, and the short shaft is tightly fitted in the gear box; the long shaft passes through the bearing C and the bearing A, and is installed in the gear box, the gear A is sleeved on the long shaft for rigid connection, the lower end of the long shaft passes through the hole of the bearing B, and is then locked with a locking nut to form a high-speed rotational movement with the gear B.

[0009] In the device for grinding coffee beans, the bearing A and the bearing C are sleeved on the lower part of the long shaft.

[0010] In the device for grinding coffee beans, the center hole of the powder sweeping blade assembly is a flat hole, the flat hole cooperates with the flat part of the long axis, and the rotation of the long axis drives the powder sweeping blade assembly to rotate.

[0011] The device for grinding coffee beans is described, wherein the powder sweeping blade assembly is provided with two raised steel columns, and there are two blind holes under the conical cutter, and the two raised steel columns of the powder sweeping blade assembly are inserted into the two blind holes of the conical cutter; the conical cutter is sleeved on the long axis and on the top of the powder sweeping blade assembly, and is locked by a nut, and the powder sweeping blade assembly rotates to drive the conical cutter to rotate, thereby grinding the coffee beans and simultaneously driving the coffee powder in the gear box out from the powder outlet.

[0012] The device for grinding coffee beans is described, wherein the gear B is provided with two layers of gears, the upper layer of gear B is a helical gear, which cooperates with the splined shaft of the motor; the lower layer of gear B is a spur gear, which cooperates with gear A to drive gear A to rotate, and gear A is penetrated by a short shaft.

[0013] In the device for grinding coffee beans, the upper end of the short shaft is installed in the hole of the gear box with an interference fit, and the lower end is installed in the hole of the bottom plate of the gear box with a clearance fit.

[0014] The device for grinding coffee beans is described, wherein the center hole of the gear A is a square hole and cooperates with the square boss of the long shaft, and the lower end of the long shaft passes through the bearing B fixed in the sinker of the bottom plate of the gear box and is locked and fixed with a lock nut.

[0015] The device for grinding coffee beans, wherein the powder adjusting ring of the knife holder is pressed by the powder adjusting ring fixing plate through clearance fit and fixed on the gear box, and can rotate on the gear box.

[0016] Beneficial effects: The utility model drives gear B through the shaft on the motor, and gear B drives gear A and the long shaft to rotate. The upper and lower ends of the long shaft, bearings A, bearing C and bearing B rotate synchronously, so that the long shaft reduces friction, better transmits torque and axial positioning; and the upper knife assembly is put on the knife holder powder adjustment ring, and the knife holder powder adjustment ring rotates and the upper knife assembly can move up and down to adjust the coarseness of the ground coffee powder. The coffee powder ground by this device is finer, uniform in coarseness, stable and low in noise. It is mainly used in bean grinders, bean grinders and pressure coffee machines. The coffee bean grinding device of the utility model has good stability, safety and reliability, and a long service life. The coffee powder produced is finer, uniform in coarseness and consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the present utility model.

[0018] Figure 2 It is an exploded view of the utility model.

[0019] Figure 3 It is a stereogram of the gear A in the present invention.

[0020] Figure 4 It is a three-dimensional diagram of the long axis in the utility model.

[0021] Figure 5 It is a stereoscopic diagram of the powder sweeping blade assembly of the utility model.

[0022] Figure 6 It is a stereoscopic diagram of the gear B and the short shaft in the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0024] like Figure 1-6As shown, the utility model discloses a device for grinding coffee beans, which includes: an upper knife assembly 1, a powder adjusting ring fixing plate 2, a knife holder powder adjusting ring 3, a nut 4, a bean-pushing piece 5, a cone knife 6, a powder sweeping blade assembly 7, a gear box 8, a long shaft 9, a bearing assembly, a gear A 12, a locking nut 13, a short shaft 15, a gear B 16, a gear box bottom plate 17, a motor 18, a steel sleeve 19, a bearing hardware pressing sheet 21, a rivet 22 and a gasket 23; the steel sleeve 19 is fixed to the mouth of the gear box 8, and the bearing hardware pressing sheet 21 is fixed to the gear box bottom plate 17 by a rivet 22; the gear box bottom plate 17 is fixed to the bottom of the gear box 8, and the long shaft 9 is installed in the gear box 8 through the bearing assembly; the gear B 16 is sleeved on the short shaft 15; the gear A 12 is sleeved on the lower end of the long shaft 9; the motor 18 is fixed to the bottom of the gear box bottom plate 17 by screws, and the motor 18 drives the gear B 16 rotates, the gear B 16 meshes with the gear A 12, and the long shaft 9 is driven to rotate through the gear A 12; the powder sweeping blade assembly 7 is sleeved on the long shaft 9; the cone cutter 6 passes through the long shaft 9 and is installed on the powder sweeping blade assembly 7; the bean-splitting blade 5 is installed on the long shaft 9 and fixed to the top of the cone cutter 6 through the nut 4; the powder adjusting ring 3 of the tool holder is fixed to the gear box 8 by screws with the powder adjusting ring fixing plate 2; the upper knife assembly 1 is screwed on the powder adjusting ring 3 of the tool holder. The gear B 16 is sleeved on the short shaft 15 for rotational movement, and the short shaft 15 is tightly fitted in the gear box 8; the long shaft passes through the bearing C 20 and the bearing A 10 and is installed in the gear box 8, the gear A 12 is sleeved on the long shaft 9 for rigid connection, the lower end of the long shaft 9 passes through the hole of the bearing B 14, and then the anti-loosening nut 13 is locked to fix it, forming a high-speed rotation movement with the gear B 16.

[0025] Specifically, the bearing assembly includes: bearing C 20, bearing A 10 and bearing B 14. The bearing C 20 and bearing A 10 are mounted in the countersunk holes of the gear box 8 and supported by a bearing pressure ring 11 in the middle; the bearing B 14 is installed in the circular countersunk platform of the gear box bottom plate 17 and is pressed by a bearing hardware pressing sheet 21. The bearing hardware pressing sheet 21 is fixed to the gear box bottom plate 17 using four rivets 22, and the lower end of the long shaft 9 is passed through the hole of the bearing B 14.

[0026] Specifically, the bearing C 20 and the bearing A 10 are sleeved on the lower part of the long shaft 9.

[0027] After adopting the above structure, the motor 18 rotates at high speed to drive the gear B 16, thereby driving the gear A 12 and the long shaft 9 to rotate, and the bearings C 20, bearing A 10 and bearing B 14 at the upper and lower ends of the long shaft 9 rotate synchronously to reduce friction and wear and enhance axial positioning, so as to better limit the displacement of the long shaft 9. The long shaft 9 drives the cone knife 6 and the powder sweeping blade assembly 7 to rotate to grind coffee beans and clean coffee powder. The coffee powder grinding device of the utility model has strong stability, safety and reliability, and has a long grinding service life. The ground coffee powder is uniform in coarseness and good in consistency.

[0028] Specifically, the center hole of the powder sweeping blade assembly 7 is a flat hole 71 , and the flat hole 71 matches with the flat part of the long shaft 9 , and the rotation of the long shaft 9 drives the powder sweeping blade assembly 7 to rotate.

[0029] Specifically, the powder sweeping blade assembly 7 is provided with two raised steel columns 70, and there are two blind holes 60 under the conical cutter 6. The two raised steel columns of the powder sweeping blade assembly 7 are inserted into the two blind holes 60 of the conical cutter 6; the conical cutter 6 is sleeved on the major axis 9, and is on the top of the powder sweeping blade assembly 7, and is locked by the nut 4. The rotation of the powder sweeping blade assembly 7 drives the conical cutter 6 to rotate, grinds the coffee beans, and at the same time drives the coffee powder in the gear box 8 out of the powder outlet.

[0030] Specifically, the gear B 16 is provided with two layers of gears, the upper layer of the gear B 16 is a helical gear, which cooperates with the splined shaft of the motor; the lower layer of the gear B 16 is a spur gear, which cooperates with the gear A 12 to drive the gear A 12 to rotate, and the gear A 12 is passed through the short shaft 15.

[0031] Specifically, the upper end of the short shaft 15 is installed in the hole of the gear box 8 with an interference fit, and the lower end is installed in the hole of the gear box bottom plate 17 with a clearance fit.

[0032] Specifically, the center hole of the gear A 12 is a square hole 120, which cooperates with the square boss 90 of the long shaft 9. The lower end of the long shaft 9 passes through the bearing B 14 fixed in the sink of the gear box bottom plate 17, and is locked at the lower end of the bearing 14 with a locking nut 13.

[0033] Specifically, the tool holder powder adjusting ring 3 is pressed by the powder adjusting ring fixing plate 2 with clearance and fixed on the gear box 8, and can rotate on the gear box 8.

[0034] The utility model drives gear B through the shaft on the motor, and gear B drives gear A and the long shaft to rotate. The upper and lower ends of the long shaft, bearings A, bearing C and bearing B rotate synchronously, so that the long shaft reduces friction, better transmits torque and axial positioning; and the upper knife assembly is sleeved on the knife holder powder adjustment ring, and the knife holder powder adjustment ring rotates and the upper knife assembly can move up and down to adjust the coarseness of the ground coffee powder. The coffee powder ground by this device is finer, uniform in coarseness, stable and low in noise. It is mainly used in bean grinders, bean grinders and pressure coffee machines. The coffee bean grinding device of the utility model has good stability, safety and reliability, and a long service life. The coffee powder produced is finer, uniform in coarseness and consistent.

[0035] The above is only the preferred implementation mode of the utility model, which certainly cannot be used to limit the scope of rights of the utility model. It should be pointed out that for technicians in this technical field, any modification or equivalent replacement of the technical solution of the utility model without creative work does not deviate from the protection scope of the technical solution of the utility model.

Claims

1. A device for grinding coffee beans, characterized in that: include: An upper knife assembly (1), a powder adjusting ring fixing plate (2), a knife holder powder adjusting ring (3), a nut (4), a bean-sweeping blade (5), a cone knife (6), a powder sweeping blade assembly (7), a gear box (8), a long shaft (9), a bearing assembly, a gear A (12), a locking nut (13), a short shaft (15), a gear B (16), a gear box bottom plate (17), a motor (18), a steel sleeve (19), a bearing hardware pressing plate (21), a rivet (22) and a gasket (23); the steel sleeve (19) is fixed to the mouth of the gear box (8), the bearing hardware pressing plate (21) is fixed to the gear box bottom plate (17) by means of a rivet (22); the gear box bottom plate (17) is fixed to the bottom of the gear box (8), the long shaft (9) is installed in the gear box (8) through the bearing assembly; the gear B (16) is sleeved on the short shaft ( 15); the gear A (12) is sleeved on the lower end of the long shaft (9) and is locked with a lock nut (13); the motor (18) is fixed to the bottom of the gear box bottom plate (17) by screws, the motor (18) drives the gear B (16) to rotate, the gear B (16) is meshed with the gear A (12), and the long shaft (9) is driven to rotate through the gear A (12); the powder sweeping blade assembly (7) is sleeved on the long shaft (9); the cone knife (6) passes through the long shaft (9) and is installed on the powder sweeping blade assembly (7); the bean-sweeping blade (5) is installed on the long shaft (9) and is fixed to the top of the cone knife (6) by a nut (4); the powder adjusting ring (3) of the knife holder is fixed to the gear box (8) by screws using the powder adjusting ring fixing plate (2); the upper knife assembly (1) is screwed on the powder adjusting ring (3) of the knife holder.

2. The device for grinding coffee beans according to claim 1, characterized in that: The bearing assembly comprises: a bearing A (10), a bearing B (14) and a bearing C (20); the bearing C (20) and the bearing A (10) are sleeved in the countersunk hole of the gear box (8) and supported by a bearing pressing ring (11) in the middle; the bearing B (14) is installed in the circular countersunk platform of the gear box bottom plate (17) and is pressed by a bearing hardware pressing plate (21); the bearing hardware pressing plate (21) is fixed to the gear box bottom plate (17) by four rivets (22); and the lower end of the long shaft (9) is inserted into the hole of the bearing B (14).

3. The device for grinding coffee beans according to claim 2, characterized in that: The bearing A (10) and the bearing C (20) are sleeved on the lower part of the long shaft (9).

4. The device for grinding coffee beans according to claim 1, characterized in that: The central hole of the powder sweeping blade assembly (7) is a flat hole (71), and the flat hole (71) cooperates with the flat part of the long shaft (9). The rotation of the long shaft (9) drives the powder sweeping blade assembly (7) to rotate.

5. The device for grinding coffee beans according to claim 1, characterized in that: The powder sweeping blade assembly (7) is provided with two protruding steel columns (70), and the conical cutter (6) has two blind holes (60) below. The two protruding steel columns of the powder sweeping blade assembly (7) are inserted into the two blind holes (60) of the conical cutter (6); the conical cutter (6) is sleeved on the long shaft (9) and is located above the powder sweeping blade assembly (7) and is locked by a nut (4). The powder sweeping blade assembly (7) rotates to drive the conical cutter (6) to rotate, thereby grinding the coffee beans and simultaneously driving the coffee powder in the gear box (8) out of the powder outlet.

6. The device for grinding coffee beans according to claim 1, characterized in that: The gear B (16) is provided with two layers of gears. The upper layer of the gear B (16) is a helical gear, which cooperates with the shaft with a spline of the motor; the lower layer of the gear B (16) is a spur gear, which cooperates with the gear A (12) to drive the gear A (12) to rotate. A gasket (23) is installed at the bottom of the gear A (12), and the short shaft (15) passes through it.

7. The device for grinding coffee beans according to claim 1, characterized in that: The upper end of the short shaft (15) is installed in the hole of the gear box (8) with an interference fit, and the lower end is installed in the hole of the gear box bottom plate (17) with a clearance fit.

8. The device for grinding coffee beans according to claim 1, characterized in that: The center hole of the gear A (12) is a square hole (120) and cooperates with the square boss of the long shaft (9). The lower end of the long shaft (9) passes through the bearing B (14) fixed in the sink of the gear box bottom plate (17) and is locked to the lower end of the bearing B (14) with a locking nut (13).

9. The device for grinding coffee beans according to claim 1, characterized in that: The tool holder powder adjusting ring (3) is pressed by the powder adjusting ring fixing plate (2) with clearance fit and fixed on the gear box (8), and is capable of rotating on the gear box (8).

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