Flexible coupling for coffee machine grinder drive shaft

Abstract

This utility model discloses an elastic coupling for the transmission shaft of a coffee machine grinding disc, relating to the field of coffee machine technology. It has the advantage of reducing the possibility of residual coffee powder and oil residue affecting the machine's operating efficiency. The key technical points are: it includes a first connecting rod that connects to and is coaxially fixed with the lower grinding blade, and a second connecting rod that connects to and is coaxially fixed with the output shaft of the drive motor. The first and second connecting rods are connected by a transmission assembly. The transmission assembly includes two opposing first semi-annular connecting blocks sleeved on the first connecting rod and two opposing second semi-annular connecting blocks sleeved on the second connecting rod. The first semi-annular connecting blocks have a plurality of first extended teeth integrated on the side facing the second semi-annular connecting blocks. The plurality of first extended teeth are arranged in an array with the center line of the first connecting rod as the center.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, specifically to a flexible coupling for the transmission shaft of a coffee machine grinding disc. Background Technology

[0002] A coffee machine is a device or machine used to make coffee. The grinding structure of existing coffee machines generally uses a combination of an upper grinding blade and a lower grinding blade. The lower grinding blade is driven by a drive motor to rotate, while the upper grinding blade is fixed by a limiting component. This allows for relative movement between the upper and lower grinding blades, so that the coffee beans placed between the upper and lower grinding blades are ground into coffee powder.

[0003] However, during the use of a coffee machine, residual coffee powder and grease will accumulate and form a layer of grime. This residue adheres to the connecting shaft, which not only affects the normal operation of the grinding head and the coupling, but may also lead to machine malfunction or performance degradation. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a flexible coupling for the drive shaft of a coffee machine's grinding disc, which has the advantage of reducing the possibility of residual coffee powder and grease affecting the machine's operating efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model provides a flexible coupling for the drive shaft of a coffee machine grinding disc, including a first connecting rod that connects to and is coaxially fixed with the lower grinding blade, and a second connecting rod that connects to and is coaxially fixed with the output shaft of the drive motor. The first and second connecting rods are connected by a transmission assembly. The transmission assembly includes two opposing first semi-annular connecting blocks sleeved on the first connecting rod and two opposing second semi-annular connecting blocks sleeved on the second connecting rod. A plurality of first extended teeth are integrally formed on the side of the first semi-annular connecting blocks facing the second semi-annular connecting blocks, with the plurality of first extended teeth centered on the first connecting rod. The lines are arranged in a circular array. A first tooth groove is provided between every two adjacent first extension teeth. Several second extension teeth are integrally formed on the side of the second semi-annular connecting block facing the first semi-annular connecting block. A second tooth groove is provided between every two adjacent second extension teeth. Each first extension tooth extends into the adjacent second tooth groove and slides and connects with the second tooth groove. Each second extension tooth extends into the adjacent first tooth groove and slides and connects with the first tooth groove. A sealing component is provided outside the two first semi-annular connecting blocks and the two second semi-annular connecting blocks to close the gap between the first semi-annular connecting blocks and the second semi-annular connecting blocks.

[0007] By adopting the above technical solution, two oppositely arranged first semi-annular connecting blocks are nested outside the first connecting rod, and two oppositely arranged second semi-annular connecting blocks are nested outside the second connecting rod. The first and second connecting rods are connected by inserting the first extension teeth into the adjacent second tooth grooves and the second extension teeth into the adjacent first tooth grooves. When the drive motor drives the second connecting rod to rotate, the power is transmitted through the cooperation of the first and second extension teeth, which drives the first connecting rod and the lower grinding blade integrated with the first connecting rod to rotate, thus realizing transmission. The gap between the two first semi-annular connecting blocks and the two second semi-annular connecting blocks is sealed by the sealing component, which reduces the possibility of residual coffee powder and oil residue affecting the machine operation, improves the machine's operating efficiency, facilitates the normal rotation of the grinding head, and ensures the uniformity of grinding and the stability of coffee flavor.

[0008] Preferably, the sealing assembly includes two arc-shaped sealing plates sleeved on the outside of two first semi-annular connecting blocks and two second semi-annular connecting blocks. The two arc-shaped sealing plates are arranged opposite each other, and the center lines of the two arc-shaped sealing plates coincide with the center line of the first connecting rod. Each of the four sides of the inner wall of each arc-shaped sealing plate is integrally provided with a rubber sealing strip to close the gap between the arc-shaped sealing plate, the first semi-annular connecting blocks and the second semi-annular connecting blocks. Each of the first extended teeth is provided with a first screw hole. Each of the arc-shaped sealing plates is provided with a first cylindrical hole that is adapted to the first screw hole and corresponds one-to-one with the first screw hole. Each of the first cylindrical holes is provided with a first screw. One end of the first screw extends out of the first cylindrical hole and extends into the adjacent first screw hole and is threadedly fixed to the first screw hole.

[0009] Preferably, the first screws located at both ends of each arc-shaped sealing plate are connected by rubber rings sleeved on the two first screws.

[0010] Preferredly, semi-circular grooves are provided on both sides of each of the first and second extension teeth, and a rubber buffer post passes through each two adjacent semi-circular grooves to seal the gap between the two adjacent semi-circular grooves.

[0011] Preferably, the first connecting rod is detachably and fixedly connected to the two first semi-circular connecting blocks via a first connecting assembly, and the second connecting rod is detachably and fixedly connected to the two second semi-circular connecting blocks via a second connecting assembly.

[0012] Preferably, the first connecting assembly includes an annular connecting sleeve fitted over the first connecting rod. The bottom end of the annular connecting sleeve extends between two first semi-annular connecting blocks, and the top end is integrally provided with a coaxially arranged annular plate. The top of the annular plate is provided with two oppositely arranged arc-shaped plates fitted over the first connecting rod. The cross-section of the two arc-shaped plates is inverted T-shaped. The two arc-shaped plates are detachably fixedly connected by a plurality of evenly arranged bolts. A plurality of corresponding second cylindrical holes are provided on both the arc-shaped plates and the annular plates. The upper surface of the first semi-annular connecting block is provided with a second screw hole located directly below the second cylindrical hole and corresponding to the second cylindrical hole. A second screw passes through each of the second cylindrical holes. The second screw passes through the arc-shaped plate and the annular connecting sleeve in sequence, and enters the second screw hole and is threadedly fixed to the second screw hole. The structure of the second connecting assembly is the same as that of the first connecting assembly.

[0013] Preferably, the outer circumferential walls of the first connecting rod and the second connecting rod are integrally provided with protrusions, and the inner walls of the annular plate and the annular connecting sleeve are provided with slots that are adapted to the protrusions. The protrusions are connected to the annular plate and the annular connecting sleeve by the slots, and the end of the slots is integrally provided with a dead stop that limits the position of the first connecting rod.

[0014] The beneficial effects of this utility model are as follows: Two relatively arranged first semi-annular connecting blocks are nested outside the first connecting rod, and two relatively arranged second semi-annular connecting blocks are nested outside the second connecting rod. The first and second connecting rods are connected by inserting the first extension teeth into the adjacent second tooth grooves and the second extension teeth into the adjacent first tooth grooves. When the drive motor drives the second connecting rod to rotate, the power is transmitted through the cooperation of the first and second extension teeth, which drives the first connecting rod and the lower grinding blade integrated with the first connecting rod to rotate, thereby realizing transmission. The gap between the two first semi-annular connecting blocks and the two second semi-annular connecting blocks is sealed by the sealing component, which reduces the possibility of residual coffee powder and oil residue entering the first and second connecting rods or adhering to the first and second tooth grooves and affecting the operation of the machine, thereby improving the machine's operating efficiency, facilitating the normal rotation of the grinding head, and ensuring the uniformity of grinding and the stability of coffee flavor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0017] Figure 2 This is a schematic diagram illustrating the structure of the rubber ring in this embodiment;

[0018] Figure 3 This is a schematic diagram illustrating the structure of the rubber buffer column in this embodiment;

[0019] Figure 4 This is a schematic diagram of the overall explosion structure in this embodiment;

[0020] Figure 5 This is a schematic diagram illustrating the dead stop in this embodiment;

[0021] Figure 6 This embodiment Figure 4 Enlarged structural diagram at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Lower grinding blade; 2. First connecting rod; 3. Second connecting rod; 4. Transmission assembly; 401. First semi-annular connecting block; 402. Second semi-annular connecting block; 403. First extension tooth; 404. First tooth groove; 405. Second extension tooth; 406. Second tooth groove; 5. Sealing assembly; 501. Arc-shaped sealing plate; 502. Rubber sealing strip; 503. First screw hole; 504. First cylindrical hole; 505. First screw; 6. Rubber ring; 7. Semi-circular groove; 8. Rubber buffer column; 9. First connecting assembly; 901. Annular connecting sleeve; 902. Annular plate; 903. Arc-shaped plate; 904. Bolt; 905. Second cylindrical hole; 906. Second screw hole; 907. Second screw; 10. Second connecting assembly; 11. Slot; 12. Dead stop. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Flexible couplings used for the grinder drive shaft of coffee machines, such as Figure 1-6 It includes a first connecting rod 2 that connects to the lower grinding blade 1 and is coaxially fixed with the lower grinding blade 1, and a second connecting rod 3 that connects to the drive motor and is coaxially fixed with the output shaft of the drive motor. The first connecting rod 2 and the second connecting rod 3 are connected by a transmission assembly 4.

[0026] like Figure 3 and Figure 4 and Figure 6The transmission assembly 4 includes two opposing first semi-annular connecting blocks 401 sleeved on the first connecting rod 2 and two opposing second semi-annular connecting blocks 402 sleeved on the second connecting rod 3. The first semi-annular connecting blocks 401 have a plurality of first extended teeth 403 integrated on the side facing the second semi-annular connecting blocks 402. The plurality of first extended teeth 403 are arranged in an array with the center line of the first connecting rod 2 as the center, and a first tooth groove 404 is provided between every two adjacent first extended teeth 403. The second semi-annular connecting blocks 402 have a plurality of second extended teeth 405 integrated on the side facing the first semi-annular connecting blocks 401. The plurality of second extended teeth 405 are arranged in an array with the center line of the second connecting rod 3 as the center, and a first tooth groove 404 is provided between every two adjacent first extended teeth 403. A second tooth groove 406 is provided between adjacent second extension teeth 405. Each first extension tooth 403 extends into the adjacent second tooth groove 406 and slides in connection with the second tooth groove 406. Each second extension tooth 405 extends into the adjacent first tooth groove 404 and slides in connection with the first tooth groove 404. The first connecting rod 2 and the second connecting rod 3 are connected by inserting the first extension tooth 403 into the adjacent second tooth groove 406 and the second extension tooth 405 into the adjacent first tooth groove 404. When the drive motor drives the second connecting rod 3 to rotate, the power is transmitted through the cooperation of the first extension tooth 403 and the second extension tooth 405, which drives the first connecting rod 2 and the lower grinding cutter 1 integrated with the first connecting rod 2 to rotate, thereby realizing the transmission.

[0027] like Figure 3 and Figure 4 and Figure 6 The dimensions of the first tooth groove 404 are adapted to the second extension tooth 405, and the dimensions of the second tooth groove 406 are adapted to the first extension tooth 403. A small gap is left between the first tooth groove 404 and the second extension tooth 405, and between the second tooth groove 406 and the first extension tooth 403. This gap can compensate for the displacement between the two axes of the first connecting rod 2 and the second connecting rod 3 within a certain range, and adapt to the axis offset caused by manufacturing and installation errors, load deformation and other factors, thereby ensuring the normal operation of the equipment.

[0028] like Figure 1 and Figure 2 and Figure 3 and Figure 4 To reduce the possibility of residual coffee powder and oil residue adhering to the first connecting rod 2, the second connecting rod 3, the first semi-annular connecting block 401, and the second semi-annular connecting block 402 and affecting the normal operation of the machine, a sealing component 5 is provided outside the two first semi-annular connecting blocks 401 and the two second semi-annular connecting blocks 402 to close the gap between the first semi-annular connecting blocks 401 and the second semi-annular connecting blocks 402. By setting the sealing component 5, the machine's operating efficiency is improved, so as to facilitate the normal rotation of the grinding head and ensure the uniformity of grinding and the stability of coffee flavor.

[0029] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The sealing assembly 5 includes two arc-shaped sealing plates 501 sleeved on the outside of the two first semi-annular connecting blocks 401 and the two second semi-annular connecting blocks 402. The two arc-shaped sealing plates 501 are arranged opposite to each other, and the center line of the two arc-shaped sealing plates 501 coincides with the center line of the first connecting rod 2. Each of the four sides of the inner wall of each arc-shaped sealing plate 501 has an integral rubber sealing strip 502 that closes the gap between the arc-shaped sealing plate 501, the first semi-annular connecting blocks 401 and the second semi-annular connecting blocks 402.

[0030] like Figure 1 and Figure 2 and Figure 3 and Figure 4 Each of the first extended teeth 403 is provided with a first screw hole 503, and each of the arc-shaped sealing plates 501 is provided with a first cylindrical hole 504 that is adapted to and corresponds one-to-one with the first screw hole 503. Each of the first cylindrical holes 504 is provided with a first screw 505, and one end of the first screw 505 extends out of the first cylindrical hole 504 and extends into the adjacent first screw hole 503 and is threadedly fixed to the first screw hole 503.

[0031] like Figure 1 and Figure 2 and Figure 3 and Figure 4 Two arc-shaped sealing plates 501 are sleeved around the two first semi-annular connecting blocks 401 and the two second semi-annular connecting blocks 402, with the ends of the two arc-shaped sealing plates 501 close to each other. A rubber sealing strip 502 seals the gap between the arc-shaped sealing plates 501, the first semi-annular connecting blocks 401, and the second semi-annular connecting blocks 402, reducing the possibility of residual coffee powder and grease entering the gap between the first semi-annular connecting blocks 401 and the second semi-annular connecting blocks 402 and adhering to the first connecting rod 2 and the second connecting rod 3, thus affecting transmission. Furthermore, the arc-shaped sealing plates 501 and the first semi-annular connecting blocks 401 are detachably fixed together by the first screw 505, improving the stability of the connection between the arc-shaped sealing plates 501 and the first semi-annular connecting blocks 401 and not affecting the movement of the first semi-annular connecting blocks 401 and the second semi-annular connecting blocks 402.

[0032] like Figure 1 and Figure 2 and Figure 3 and Figure 4The first screws 505 located at both ends of each arc-shaped sealing plate 501 are connected by rubber rings 6 sleeved on the two first screws 505. The rubber rings 6 are sleeved on the first screws 505 at the ends of the two arc-shaped sealing plates 501 and are clamped and fixed with the first screws 505, reducing the possibility of the first screws 505 falling off during long-term rotation and improving the stability of the device.

[0033] like Figure 3 and Figure 4 Each of the first extension teeth 403 and the second extension teeth 405 has a semi-circular groove 7 on both sides. A rubber buffer post 8 passes through between every two adjacent semi-circular grooves 7. The rubber buffer post 8 seals the gap between two adjacent semi-circular grooves 7. By setting the rubber buffer post 8 that is adapted to the semi-circular groove 7, the gap between two adjacent semi-circular grooves 7 is sealed, which reduces the possibility of the first semi-circular connecting block 401 and the second semi-circular connecting block 402 disengaging, while playing a buffering role, absorbing vibration and mitigating impact, and further reducing the possibility of residual coffee powder and oil entering the gap between the first semi-circular connecting block 401 and the second semi-circular connecting block 402.

[0034] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The first connecting rod 2 is detachably and fixedly connected to the two first semi-circular connecting blocks 401 via the first connecting assembly 9, and the second connecting rod 3 is detachably and fixedly connected to the two second semi-circular connecting blocks 402 via the second connecting assembly 10. The first connecting assembly 9 connects the first connecting rod 2 and the two first semi-circular connecting blocks 401, and the second connecting assembly 10 connects the second connecting rod 3 and the two second semi-circular connecting blocks 402. This facilitates disassembly and cleaning while improving the stability of the connection and further reducing the possibility of residual coffee powder and grease affecting the operation of the equipment.

[0035] like Figure 1 and Figure 2 and Figure 3 and Figure 4The first connecting assembly 9 includes an annular connecting sleeve 901 fitted over the first connecting rod 2. One end of the rubber buffer post 8 abuts against the inner wall of the arc-shaped sealing plate 501, and the other end abuts against the outer wall of the annular connecting sleeve 901. The bottom end of the annular connecting sleeve 901 extends between two first semi-annular connecting blocks 401, and the top end is integrally provided with a coaxially arranged annular plate 902. The top of the annular plate 902 is provided with two oppositely arranged arc-shaped plates 903 fitted over the first connecting rod 2. The cross-section of the two arc-shaped plates 903 is inverted T-shaped, and the two arc-shaped plates 903 are connected by a number of evenly arranged bolts 904. The detachable fixed connection has several corresponding second cylindrical holes 905 on both the arc plate 903 and the annular plate 902. The upper surface of the first semi-annular connecting block 401 has a second screw hole 906 located directly below the second cylindrical hole 905 and corresponding to the second cylindrical hole 905. A second screw 907 passes through each second cylindrical hole 905. The second screw 907 passes through the arc plate 903 and the annular connecting sleeve 901 in sequence, and enters the second screw hole 906 and is threadedly fixed to the second screw hole 906. The second connecting assembly 10 has the same structure as the first connecting assembly 9.

[0036] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The arc plate 903, the ring plate 902, and the first semi-circular connecting block 401 are detachably fixed together by the second screw 907, which facilitates disassembly and assembly while improving the stability of the connection between the arc plate 903, the ring plate 902, and the semi-circular connecting block.

[0037] like Figure 5 The outer circumferential walls of the first connecting rod 2 and the second connecting rod 3 are both integrally provided with protrusions. The inner walls of the annular plate 902 and the annular connecting sleeve 901 are both provided with slots 11 that are adapted to the protrusions. The protrusions are engaged with the annular plate 902 and the annular connecting sleeve 901 through the slots 11. The protrusions are slidably connected to the slots 11. The size of the slots 11 is slightly larger than the size of the protrusions. The end of the slots 11 is integrally provided with a dead stop 12 that limits the position of the first connecting rod 2. Through the cooperation of the protrusions and the slots 11, the rotation of the integrated annular plate 902 and the annular connecting sleeve 901 will drive the rotation of the first connecting rod 2 and the second connecting rod 3. By setting the dead stop 12, the position of the first connecting rod 2 and the second connecting rod 3 is limited.

[0038] In use, the operator first places the annular plate 902 and the annular connecting sleeve 901 on the outside of the first connecting rod 2, the protrusion enters the slot 11 and abuts against the dead stop 12, the two first semi-annular connecting blocks 401 are placed on the outside of the annular connecting sleeve 901 and abut against each other, the two arc plates 903 are placed on the outside of the first connecting rod 2 and abut against each other, the bottom end of the arc plate 903 is completely attached to the upper surface of the annular plate 902, the lower surface of the annular plate 902 is completely attached to the upper surface of the first semi-annular connecting block 401, the two arc plates 903 are detachably fixed by several evenly arranged bolts 904, the arc plates 903, the annular plate 902, and the first semi-annular connecting blocks 401 are detachably fixed by the second screws 907, and the two arc plates 903 are detachably fixed to the first connecting rod 2 by the third screw. At this time, the first connecting rod 2, the two arc plates 903, the annular plate 902, the annular connecting sleeve 901, and the two first semi-annular connecting blocks are assembled and fixed.

[0039] Repeat the operation to assemble and fix the second connecting rod 3, the two arc plates 903, the ring plate 902, the ring connecting sleeve 901, and the two second semi-ring connecting blocks. The assembly method is the same for both, so it will not be described in detail here.

[0040] Then, the first extended tooth 403 is inserted into the adjacent second tooth groove 406, and each second extended tooth 405 is inserted into the adjacent first tooth groove 404 and slidably connected with the first tooth groove 404. Several rubber buffer pillars 8 are inserted between two adjacent semi-circular grooves 7 to seal the gap between the two adjacent semi-circular grooves 7. One end of the rubber buffer pillar 8 abuts against the outer wall of the annular connecting sleeve 901. Then, two arc-shaped sealing plates 501 are fitted over the two first semi-annular connecting blocks 401 and the two second semi-annular connecting blocks 402. The rubber sealing strip 502 seals the gap between the arc-shaped sealing plate 501, the first semi-annular connecting block 401 and the second semi-annular connecting block 402. The arc-shaped sealing plate 501 and the first extended tooth 403 are detachably fixedly connected by the first screw 505. The rubber ring 6 is fitted over the first screw 505 at the end of the two arc-shaped sealing plates 501 and is clamped and fixed with the first screw 505. At this time, the drive motor provides power to drive the... The first connecting rod 2, which is coaxially fixed to the output shaft of the drive motor, rotates. Power is transmitted through the cooperation of the arc plate 903, the ring plate 902, the ring connecting sleeve 901, the first semi-annular connecting block 401, the first extended tooth 403, the first tooth groove 404, the second extended tooth 405, and the second tooth groove 406, driving the second connecting rod 3 to rotate. Through the cooperation of the rubber buffer column 8 and the rubber sealing strip 502, the displacement between the two axes of the first connecting rod 2 and the second connecting rod 3 can be compensated within a certain range. This adapts to the axis offset caused by manufacturing and installation errors, load deformation, and other factors, thereby ensuring the normal operation of the equipment. At the same time, it reduces the possibility of residual coffee powder and grease entering the gap between the first semi-annular connecting block 401 and the second semi-annular connecting block 402, further improving the service life of the equipment. The splicing seam of the two first semi-annular connecting blocks 401 and the two second semi-annular connecting blocks 402 is not parallel to the splicing seam of the two arc plates 903.

[0041] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A flexible coupling for a transmission shaft of a coffee grinder mill, comprising a first connecting rod (2) connected to and coaxial with a lower grinding blade (1), and a second connecting rod (3) connected to and coaxial with an output shaft of a drive motor, characterized in that, The first connecting rod (2) and the second connecting rod (3) are connected by a transmission assembly (4); The transmission assembly (4) includes two opposing first semi-annular connecting blocks (401) sleeved outside the first connecting rod (2) and two opposing second semi-annular connecting blocks (402) sleeved outside the second connecting rod (3). The first semi-annular connecting blocks (401) have a plurality of first extension teeth (403) integrally formed on the side facing the second semi-annular connecting blocks (402). A first tooth groove (404) is provided between every two adjacent first extension teeth (403). The second semi-annular connecting blocks (402) face the first semi-annular connecting blocks (401). One side is integrally provided with several second extension teeth (405), and a second tooth groove (406) is provided between each two adjacent second extension teeth (405). Each first extension tooth (403) extends into the adjacent second tooth groove (406), and each second extension tooth (405) extends into the adjacent first tooth groove (404). A sealing component (5) is provided outside the two first semi-annular connecting blocks (401) and the two second semi-annular connecting blocks (402) to close the gap between the first semi-annular connecting blocks (401) and the second semi-annular connecting blocks (402).

2. The flexible coupling for the coffee machine grinder drive shaft as described in claim 1, characterized in that, The sealing assembly (5) includes two arc-shaped sealing plates (501) sleeved on the outside of two first semi-annular connecting blocks (401) and two second semi-annular connecting blocks (402). Each of the four sides of the inner wall of the arc-shaped sealing plate (501) is integrally equipped with a rubber sealing strip (502) to close the gap between the arc-shaped sealing plate (501), the first semi-annular connecting block (401) and the second semi-annular connecting block (402). The arc-shaped sealing plate (501) and the first extension tooth (403) are detachably fixedly connected by a first screw (505).

3. The flexible coupling for the coffee machine grinder drive shaft as described in claim 2, characterized in that, The first screws (505) located at both ends of each arc-shaped sealing plate (501) are connected by rubber rings (6) sleeved on the two first screws (505).

4. The flexible coupling for the coffee machine grinder drive shaft as described in claim 1, characterized in that, Each of the first extension teeth (403) and the second extension teeth (405) has a semi-circular groove (7) on both sides. A rubber buffer column (8) passes through each two adjacent semi-circular grooves (7) to seal the gap between the two adjacent semi-circular grooves (7).

5. The flexible coupling for the coffee machine grinder drive shaft as described in claim 1, characterized in that, The first connecting rod (2) is detachably fixedly connected to the two first semi-circular connecting blocks (401) through the first connecting assembly (9), and the second connecting rod (3) is detachably fixedly connected to the two second semi-circular connecting blocks (402) through the second connecting assembly (10).

6. The flexible coupling for the coffee machine grinder drive shaft as described in claim 5, characterized in that, The first connecting component (9) includes an annular connecting sleeve (901) sleeved outside the first connecting rod (2). The bottom end of the annular connecting sleeve (901) extends between two first semi-annular connecting blocks (401), and the top end is integrally provided with an annular plate (902) arranged coaxially. The top of the annular plate (902) is provided with two arc-shaped plates (903) arranged opposite to each other and sleeved outside the first connecting rod (2). The cross-section of the two arc-shaped plates (903) is inverted T-shaped, and the two arc-shaped plates (903) are detachably fixedly connected by a number of evenly arranged bolts (904). The arc plate (903), the ring plate (902) and the adjacent first semi-ring connecting block (401) or second semi-ring connecting block (402) are detachably fixedly connected by a number of second screws (907).

7. The flexible coupling for the coffee machine grinder drive shaft as described in claim 6, characterized in that, The outer circumferential walls of the first connecting rod (2) and the second connecting rod (3) are integrally provided with protrusions. The inner walls of the annular plate (902) and the annular connecting sleeve (901) are provided with slots (11) that are adapted to the protrusions. The protrusions are connected to the annular plate (902) and the annular connecting sleeve (901) by the slots (11). The end of the slots (11) is integrally provided with a dead stop (12) that limits the position of the first connecting rod (2).

Images