Rotating shaft transmission structure of bean grinder

Abstract

The utility model discloses a rotating shaft transmission structure of a bean grinder, which belongs to the technical field of bean grinders and comprises a rotating shaft, a rotating shaft fixing frame, a rear cover, a conical cutter and a conical cutter chuck, the rotating shaft fixing frame is fixedly connected with the rear cover, and the conical cutter and the conical cutter chuck are connected in a matched mode and located between the rotating shaft fixing frame and the rear cover. The rotating shaft is sequentially inserted into the rotating shaft fixing frame, the cone cutter and the cone cutter chuck, the rotating shaft is rotationally arranged on the rotating shaft fixing frame and drives the cone cutter to rotate together through the cone cutter chuck during rotation, and rolling beads are arranged between the rotating shaft and the rotating shaft fixing frame, and / or between the rotating shaft fixing frame and the cone cutter, and / or between the cone cutter chuck and the rear cover. And the rolling beads are matched and connected. According to the structure, the rolling effect of the rolling beads is utilized, and a series of problems such as sintering among components, high-temperature damage, loud noise and swinging caused by overlarge rotating clearance caused by friction between the rotating shaft and / or the cone cutter and / or the cone cutter chuck and the rotating shaft fixing frame and / or the rear cover during rotation are avoided.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, specifically a coffee grinder shaft transmission structure. Background Technology

[0002] In traditional coffee grinders, the fixing structure of the burr assembly and the conical blade requires a more precise fit than other parts. The fit between the conical blade and the shaft is crucial. Currently, the structural design typically uses screws and washers to fix their relative positions in a relatively simple way. While this design is simple and low-cost, it is too limiting for high-precision grinding requirements and cannot improve accuracy. The main reason is that fixing with screws and washers causes several problems. First, when the conical blade and the shaft are in contact, it is difficult to ensure coaxiality at both ends of the shaft, causing the conical blade to wobble and collide with the burr, resulting in wear on the blade edges. Second, when the conical blade and the shaft rotate at high speed, they generate a lot of heat due to intense friction on the washers and plastic parts they are mating with, causing problems such as sintering of parts and failure between components. This leads to a decrease in the overall grinding performance of the machine, failing to meet user needs and resulting in a poor overall user experience.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The present invention aims to provide a shaft transmission structure for a coffee grinder to overcome the shortcomings of the prior art.

[0005] A grinder shaft drive structure designed for this purpose includes a shaft, a shaft fixing frame, a rear cover, a conical blade, and a conical blade chuck. The shaft fixing frame is fixedly connected to the rear cover. The conical blade is engaged with the conical blade chuck and both are located between the shaft fixing frame and the rear cover. The shaft is sequentially inserted into the shaft fixing frame, the conical blade, and the conical blade chuck. The shaft is rotatably mounted on the shaft fixing frame and drives the conical blade to rotate together through the conical blade chuck during rotation.

[0006] Rolling balls are provided between the rotating shaft and the rotating shaft fixing frame, and / or between the rotating shaft fixing frame and the conical cutter, and / or between the conical cutter chuck and the rear cover, and are connected by the rolling balls.

[0007] A limiting ring is provided at the outer end of the rotating shaft, and a rotating shaft mounting bracket is provided with a rotating shaft mounting through hole groove. A first rolling ball and a second rolling ball are respectively provided at the outer and inner ends of the rotating shaft mounting through hole groove. A rear cover ring groove is provided on the rear cover ring groove, and a third rolling ball is provided on the rear cover ring groove. The rotating shaft is rotatably mounted on the rotating shaft mounting through hole groove. The limiting ring is connected to the outer end of the rotating shaft mounting through hole groove through the first rolling ball. The conical cutter is connected to the inner end of the rotating shaft mounting through hole groove through the second rolling ball. The conical cutter chuck is connected to the rear cover through the third rolling ball.

[0008] The first, second, and third rolling balls are provided in multiples. The multiple first and second rolling balls are arranged in a ring around the outer periphery of the through hole groove of the rotating shaft frame, and the multiple third rolling balls are arranged in a ring around the track of the rear cover ring groove.

[0009] The outer and inner ends of the through-hole groove of the rotating shaft frame are respectively provided with a first bearing and a second bearing. The rotating shaft is rotatably mounted on the through-hole groove of the rotating shaft frame through the first bearing and the second bearing. The first rolling ball rolls between the limiting ring and the first bearing, and the second rolling ball rolls between the tapered cutter and the second bearing.

[0010] A ball bearing washer is also provided on the rear cover annular groove, and the third ball bearing rolls between the conical cutter chuck and the ball bearing washer.

[0011] The conical cutter is provided with a conical cutter through hole, and the conical cutter chuck is provided with a conical cutter chuck square hole. The rotating shaft bracket through hole groove, the conical cutter through hole, and the conical cutter chuck square hole are on the same axis. The inner end of the rotating shaft is provided with a flat part. The rotating shaft is sequentially inserted into the rotating shaft bracket through hole groove and the conical cutter through hole, and is driven to be inserted into the conical cutter chuck square hole by the flat part.

[0012] The conical cutter chuck is provided with a transmission part, and the conical cutter is provided with a transmission engagement part, and the transmission part and the transmission engagement part are in transmission engagement.

[0013] The rear cover is also provided with a countersunk platform, a countersunk hole is provided on the countersunk platform, a fastener is provided on the countersunk platform, a ball bearing is provided on the countersunk hole, and a fixing part and a connecting part are provided in sequence on the inner end of the rotating shaft. The rotating shaft is connected to the fastener through the fixing part and to the ball bearing through the connecting part.

[0014] An adjusting ring is also provided between the rotating shaft fixing frame and the rear cover. The adjusting ring is positioned and rotated between the rotating shaft fixing frame and the rear cover, and is driven to connect to the blade plate fixing frame. The blade plate fixing frame is threaded to drive the blade plate movable frame. The blade plate is provided on the blade plate movable frame. The blade plate and the conical blade cooperate with each other to form a grinding system.

[0015] The rear cover is also provided with a sealing cover, which is located around the powder outlet opening of the rear cover.

[0016] This invention, through structural improvements, utilizes the rolling action of ball bearings to enable mutual rotational engagement between the rotating shaft and the rotating shaft fixing frame, and / or between the rotating shaft fixing frame and the conical blade, and / or between the conical blade chuck and the rear cover. This effectively avoids friction between the rotating shaft, and / or the conical blade, and / or the conical blade chuck and the rotating shaft fixing frame and / or the rear cover during rotation, preventing a series of problems such as component sintering, high-temperature damage, excessive noise, and excessive rotational clearance causing wobbling. This achieves the high-precision, high-performance transmission technology requirements for the grinder's rotating shaft, enriching the diversity and practicality of grinder product structures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the disassembled assembly structure of an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the assembly cross-sectional structure of an embodiment of the present invention.

[0019] Figure 3 This is an exploded structural diagram of the rotating shaft, conical cutter, and conical cutter chuck.

[0020] Figure 4 This is a schematic diagram of the rotating shaft.

[0021] Figure 5 This is a schematic diagram of a conical cutter.

[0022] Figure 6 This is a schematic diagram of the conical cutter chuck. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] See Figures 1-6 The rotating shaft drive structure of this coffee grinder includes a rotating shaft 1, a rotating shaft fixing frame 2, a rear cover 3, a conical blade 4, and a conical blade chuck 5. The rotating shaft fixing frame 2 is fixedly connected to the rear cover 3. The conical blade 4 is connected to the conical blade chuck 5 and the two are located between the rotating shaft fixing frame 2 and the rear cover 3. The rotating shaft 1 is sequentially inserted into the rotating shaft fixing frame 2, the conical blade 4, and the conical blade chuck 5. The rotating shaft 1 is rotatably mounted on the rotating shaft fixing frame 2 and drives the conical blade 4 to rotate together through the conical blade chuck 5 when rotating.

[0026] Among them, rolling balls are provided between the rotating shaft 1 and the rotating shaft fixing frame 2, and / or between the rotating shaft fixing frame 2 and the conical cutter 4, and / or between the conical cutter chuck 5 and the rear cover 3, and are connected by the rolling balls.

[0027] This embodiment utilizes the rolling action of ball bearings to enable mutual rotational engagement between the rotating shaft 1 and the rotating shaft fixing frame 2, and / or between the rotating shaft fixing frame 2 and the conical blade 4, and / or between the conical blade chuck 5 and the rear cover 3. This effectively avoids friction between the rotating shaft 1, and / or the conical blade 4, and / or the conical blade chuck 5 and the rotating shaft fixing frame 2 and / or the rear cover 3 during rotation, thus preventing a series of problems such as sintering between components, high-temperature damage, excessive noise, and excessive rotational clearance causing wobbling. This achieves the high-precision, high-performance transmission technology requirements of the rotating shaft 1 of the coffee grinder, enriching the diversity and practicality of the coffee grinder product structure.

[0028] A limiting ring 6 is provided at the outer end of the rotating shaft 1. A rotating shaft fixing frame 2 is provided with a rotating shaft frame through hole groove 7. A first rolling ball 8 and a second rolling ball 9 are respectively provided at the outer and inner ends of the rotating shaft frame through hole groove 7. A rear cover ring groove 10 is provided on the rear cover ring groove 10. A third rolling ball 11 is provided on the rear cover ring groove 10. The rotating shaft 1 is rotatably mounted on the rotating shaft frame through hole groove 7. The limiting ring 6 is connected to the outer end of the rotating shaft frame through hole groove 7 through the cooperation of the first rolling ball 8. The conical cutter 4 is connected to the inner end of the rotating shaft frame through hole groove 7 through the cooperation of the second rolling ball 9. The conical cutter chuck 5 is connected to the rear cover 3 through the cooperation of the third rolling ball 11.

[0029] In this embodiment, when the rotating shaft 1 rotates, the conical cutter 4 and the conical cutter chuck 5 rotate together. At this time, the limiting ring 6 rotates at the outer end of the rotating shaft frame through hole groove 7 via the first rolling ball 8, the conical cutter 4 rotates at the inner end of the rotating shaft frame through hole groove 7 via the second rolling ball 9, and the conical cutter chuck 5 rotates on the rear cover 3 via the third rolling ball 11, thereby improving the rotational coordination stability between the rotating shaft 1 and the rotating shaft fixing frame 2, between the rotating shaft fixing frame 2 and the conical cutter 4, and between the conical cutter chuck 5 and the rear cover 3.

[0030] A number of first rolling balls 8, second rolling balls 9, and third rolling balls 11 are provided. The number of first rolling balls 8 and second rolling balls 9 are arranged in a ring around the outer periphery of the through hole groove 7 of the rotating shaft frame, and the number of third rolling balls 11 are arranged in a ring along the trajectory of the rear cover ring groove 10.

[0031] In this embodiment, the rolling action of multiple first rolling balls 8, second rolling balls 9, and third rolling balls 11 is used to provide a stable rotational bearing force for the rotation between the rotating shaft 1 and the rotating shaft fixing frame 2, between the rotating shaft fixing frame 2 and the conical cutter 4, and between the conical cutter chuck 5 and the rear cover 3, so as to further improve the rotational fit stability between the above-mentioned components.

[0032] The outer and inner ends of the through hole groove 7 of the rotating shaft frame are respectively provided with a first bearing 12 and a second bearing 13. The rotating shaft 1 is rotatably mounted on the through hole groove 7 of the rotating shaft frame through the first bearing 12 and the second bearing 13. The first rolling ball 8 rolls between the limiting ring 6 and the first bearing 12, and the second rolling ball 9 rolls between the conical cutter 4 and the second bearing 13.

[0033] A ball bearing washer 14 is also provided on the rear cover annular groove 10, and the third ball bearing 11 rolls between the conical cutter chuck 5 and the ball bearing washer 14.

[0034] In this embodiment, the first bearing 12 and the second bearing 13 are both oil-impregnated bearings, located at the outer and inner ends of the through-hole groove 7 of the shaft bracket, respectively. This provides the same bearing rotational power to different positions of the shaft 1, ensuring that the shaft 1 can rotate on the through-hole groove 7 of the shaft bracket along a single axis. In addition, since the first rolling ball 8 rolls between the limiting ring 6 and the first bearing 12, the second rolling ball 9 rolls between the conical cutter 4 and the second bearing 13, and the third rolling ball 11 rolls between the conical cutter chuck 5 and the rolling ball washer 14, the limiting ring 6 and the shaft fixing frame 2 are in a spaced rotational engagement through the first rolling ball 8, the conical cutter 4 and the shaft fixing frame 2 are in a spaced rotational engagement through the second rolling ball 9, and the conical cutter chuck 5 and the rear cover 3 are in a spaced rotational engagement through the third rolling ball 11. This avoids direct contact and frictional heat generation between the limiting ring 6 and the shaft fixing frame 2, the conical cutter 4 and the shaft fixing frame 2, and the conical cutter chuck 5 and the rear cover 3 during rotation, greatly improving the rotational engagement stability between the above components.

[0035] The conical cutter 4 is provided with a conical cutter through hole 15, and the conical cutter chuck 5 is provided with a conical cutter chuck square hole 16. The shaft bracket through hole groove 7, the conical cutter through hole 15, and the conical cutter chuck square hole 16 are on the same axis. The inner end of the shaft 1 is provided with a flat part 17. The shaft 1 is sequentially inserted into the shaft bracket through hole groove 7 and the conical cutter through hole 15, and is driven to be inserted into the conical cutter chuck square hole 16 through the flat part 17.

[0036] The conical cutter chuck 5 is provided with a transmission part 18, and the conical cutter 4 is provided with a transmission engagement part 19. The transmission part 18 and the transmission engagement part 19 are in transmission engagement.

[0037] In this embodiment, the rotating shaft 1 is driven to connect with the conical cutter chuck 5 through the cooperation of the flat part 17 and the square hole 16 of the conical cutter chuck. The conical cutter chuck 5 is driven to connect with the conical cutter 4 through the cooperation of the transmission part 18 and the transmission mating part 19, so that the rotating shaft 1 can drive the conical cutter chuck 5 and the conical cutter 4 to rotate together when rotating.

[0038] The rear cover 3 is also provided with a countersunk plate 20, a countersunk hole 21, a fastener 22, and a ball bearing 23. The inner end of the rotating shaft 1 is also provided with a fixing part 24 and a connecting part 25 in sequence. The rotating shaft 1 is connected to the fastener 22 through the fixing part 24 and to the ball bearing 23 through the connecting part 25.

[0039] In this embodiment, fasteners 22 are used to securely connect the rotating shaft 1, rotating shaft fixing bracket 2, conical cutter 4, conical cutter chuck 5, first rolling ball 8, first bearing 12, second rolling ball 9, and second bearing 13, thereby preventing the possibility of vertical movement of the rotating shaft 1, conical cutter 4, and conical cutter chuck 5 during operation. At the same time, the inner end of the rotating shaft 1 is rotatably engaged with the rear cover 3 by using ball bearing 23, thereby effectively preventing the rotating shaft 1 from wobbling during rotation and improving transmission stability.

[0040] An adjusting ring 26 is also provided between the rotating shaft fixing frame 2 and the rear cover 3. The adjusting ring 26 is positioned and rotated between the rotating shaft fixing frame 2 and the rear cover 3, and is driven to connect to the blade fixing frame 27. The blade fixing frame 27 is threaded to drive the blade movable frame 28. The blade movable frame 28 is provided with a blade 29. The blade 29 and the conical blade 4 cooperate with each other to form a grinding system.

[0041] In this embodiment, the rear cover 3 is provided with an annular positioning part, and the adjusting ring 26 is provided with an annular positioning mating part, and is positioned and rotated on the annular positioning part through the annular positioning mating part.

[0042] The conical cutter 4 is located inside the cutter head 29. Both the cutter head 29 and the conical cutter 4 have cutting edges. When the conical cutter 4 rotates at high speed, the coffee beans are ground into coffee powder by the cutting edges of the cutter head 29 and the conical cutter 4.

[0043] When in use, the user applies a tool or workpiece to the adjusting ring 26, causing it to rotate in a fixed position. As the adjusting ring 26 rotates in a fixed position, it drives the cutter head fixing frame 27 to rotate in a fixed position as well. As the cutter head fixing frame 27 rotates in a fixed position, it drives the cutter head movable frame 28 to reciprocate along the axis of the rotating shaft 1 via a thread, thereby ultimately driving the cutter head 29 to move relative to the conical cutter 4, thus adjusting the gap between the cutter head 29 and the conical cutter 4 to adjust the grind size of the coffee beans.

[0044] The rear cover 3 is also provided with a sealing cover 30. The sealing cover 30 is located around the powder outlet of the rear cover 3, thereby reducing the coffee powder from drifting out of the powder outlet of the rear cover 3 and making the ground coffee powder gather at the center of the powder outlet of the rear cover 3.

[0045] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A coffee grinder shaft drive structure, comprising a shaft (1), a shaft fixing bracket (2), a rear cover (3), a conical blade (4), and a conical blade chuck (5), characterized in that: The rotating shaft fixing bracket (2) is fixedly connected to the rear cover (3), the conical cutter (4) is connected to the conical cutter chuck (5) and the two are located between the rotating shaft fixing bracket (2) and the rear cover (3), the rotating shaft (1) is sequentially inserted on the rotating shaft fixing bracket (2), the conical cutter (4) and the conical cutter chuck (5), the rotating shaft (1) is rotatably mounted on the rotating shaft fixing bracket (2), and when rotating, the conical cutter (4) is driven to rotate together by the conical cutter chuck (5); Among them, rolling balls are provided between the rotating shaft (1) and the rotating shaft fixing frame (2), and / or between the rotating shaft fixing frame (2) and the conical cutter (4), and / or between the conical cutter chuck (5) and the rear cover (3), and are connected by the rolling balls.

2. The grinder shaft transmission structure according to claim 1, characterized in that: The outer end of the rotating shaft (1) is provided with a limiting ring (6), the rotating shaft fixing frame (2) is provided with a rotating shaft frame through hole groove (7), the outer end and the inner end of the rotating shaft frame through hole groove (7) are respectively provided with a first rolling ball (8) and a second rolling ball (9), the rear cover (3) is provided with a rear cover ring groove (10), the rear cover ring groove (10) is provided with a third rolling ball (11), the rotating shaft (1) is rotatably mounted on the rotating shaft frame through hole groove (7), the limiting ring (6) is connected to the outer end of the rotating shaft frame through hole groove (7) through the first rolling ball (8), the conical cutter (4) is connected to the inner end of the rotating shaft frame through hole groove (7) through the second rolling ball (9), and the conical cutter chuck (5) is connected to the rear cover (3) through the third rolling ball (11).

3. The grinder shaft transmission structure according to claim 2, characterized in that: The first rolling ball (8), the second rolling ball (9), and the third rolling ball (11) are provided in a plurality of units. The plurality of the first rolling ball (8) and the second rolling ball (9) are arranged in a ring around the outer periphery of the through hole groove (7) of the rotating shaft frame, and the plurality of the third rolling ball (11) are arranged in a ring around the trajectory of the rear cover ring groove (10).

4. The grinder shaft transmission structure according to claim 2, characterized in that: The outer end and inner end of the through hole groove (7) of the rotating shaft frame are respectively provided with a first bearing (12) and a second bearing (13). The rotating shaft (1) is rotatably mounted on the through hole groove (7) of the rotating shaft frame through the first bearing (12) and the second bearing (13). The first rolling ball (8) rolls between the limiting ring (6) and the first bearing (12), and the second rolling ball (9) rolls between the tapered cutter (4) and the second bearing (13).

5. The grinder shaft transmission structure according to claim 4, characterized in that: A ball bearing pad (14) is also provided on the rear cover annular groove (10), and the third ball bearing (11) rolls between the conical cutter chuck (5) and the ball bearing pad (14).

6. The grinder shaft transmission structure according to claim 2, characterized in that: The conical cutter (4) is provided with a conical cutter through hole (15), and the conical cutter chuck (5) is provided with a conical cutter chuck square hole (16). The rotating shaft bracket through hole groove (7), the conical cutter through hole (15), and the conical cutter chuck square hole (16) are on the same axis. The inner end of the rotating shaft (1) is provided with a flat part (17). The rotating shaft (1) is sequentially inserted into the rotating shaft bracket through hole groove (7) and the conical cutter through hole (15), and is driven to be inserted into the conical cutter chuck square hole (16) by the flat part (17).

7. The grinder shaft transmission structure according to claim 1, characterized in that: The conical cutter chuck (5) is provided with a transmission part (18), and the conical cutter (4) is provided with a transmission engagement part (19). The transmission part (18) and the transmission engagement part (19) are in transmission engagement.

8. The grinder shaft transmission structure according to claim 6, characterized in that: The rear cover (3) is also provided with a countersunk platform (20), a countersunk hole (21) is provided on the countersunk platform (20), a fastener (22) is provided on the countersunk platform (20), a ball bearing (23) is provided on the countersunk hole (21), and a fixing part (24) and a connecting part (25) are provided in sequence on the inner end of the rotating shaft (1). The rotating shaft (1) is connected to the fastener (22) through the fixing part (24) and to the ball bearing (23) through the connecting part (25).

9. The grinder shaft transmission structure according to claim 1, characterized in that: An adjusting ring (26) is also provided between the rotating shaft fixing frame (2) and the rear cover (3). The adjusting ring (26) is positioned and rotated between the rotating shaft fixing frame (2) and the rear cover (3), and is driven to be connected to the blade plate fixing frame (27). The blade plate fixing frame (27) is threaded to be connected to the blade plate movable frame (28). The blade plate movable frame (28) is provided with a blade plate (29). The blade plate (29) and the conical blade (4) cooperate with each other and form a grinding system.

10. The grinder shaft transmission structure according to claim 1, characterized in that: The rear cover (3) is also provided with a sealing cover (30), which is located around the powder outlet opening of the rear cover (3).

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