WO2021204008A1 - Grinding machine - Google Patents

Abstract

Provided is a grinding machine, comprising: a base (10), a machine body, and a grinding mechanism (30); a grinding cavity (21) is provided in the machine body; the machine body has a material feed inlet (24) and a powder outlet which are respectively connected to the grinding cavity (21); the powder outlet is connected to a powder outlet pipe (25) suspended above the base (10); the grinding machine also comprises a powder ejection mechanism (40); the powder ejection mechanism (40) comprises a powder ejection member and an elastic member (44); the powder ejection member is rotatably connected to the machine body and the elastic member (44) acts on the powder ejection member such that when the external force that keeps the powder ejection member away from the powder outlet pipe (25) is withdrawn, the powder ejection member returns to its position and hits the powder outlet pipe (25). After the grinding is completed, the grinding machine can, if necessary, use the powder ejection mechanism (40) to hit the powder outlet pipe (25), causing the powder adhered to the wall of the powder outlet pipe (25) to be knocked off, achieving the purpose of cleaning the powder outlet pipe (25), and reducing the probability of the powder outlet pipe (25) becoming clogged.

Description

A grinding machine Technical field

The embodiment of the utility model relates to the technical field of household appliances, in particular to a grinding machine.

Background technique

With the improvement of people's living standards, people are increasingly pursuing the quality of life, and people who love coffee are pursuing the quality of coffee more and more. The ideal time to grind coffee is to grind before it is brewed. Therefore, the use of grinders is becoming more and more widespread.

The grinder is usually equipped with a powder outlet pipe. The powder outlet pipe generally has the problems of sticking and storing powder on the pipe wall, and it is not easy to clean, causing the powder outlet pipe to be blocked and affecting the powder output efficiency.

The powder outlet pipes of the grinders currently used on the market have no clean design, which cannot solve the problem of sticking powder and easy blockage in the powder outlet pipe. For example, the Chinese patent application with the authorized announcement number CN209899189U discloses a grinder. One side of the powder outlet is provided with a powder outlet tube on the powder receiving rack. There is no powder cleaning design on the powder outlet tube. When used, the powder will stick. Connected to the pipe wall, causing blockage of the pipe and affecting powder discharge.

Utility model content

In view of the above-mentioned problems in the prior art, the embodiment of the present invention provides a grinder that can clean the powder outlet pipe to reduce the probability of powder clogging.

In order to solve the above-mentioned problems, the technical solution provided by the embodiments of the present invention is: a grinding machine, comprising: a base, a body and a grinding mechanism, the body has a grinding cavity, and the body has a grinding cavity separate from the grinding cavity. Connected feed inlet and powder outlet, the powder outlet is connected with a powder outlet pipe suspended above the base; characterized in that, the grinder further includes:

An elastic powder mechanism comprising an elastic powder member and an elastic member, the elastic powder member is rotatably connected to the base, the body or the grinding mechanism, and the elastic member acts on the elastic powder member to make the elastic powder When the external force of the powder member away from the powder outlet pipe is removed, the powder elastic member resets and hits the powder outlet pipe.

The grinder of the embodiment of the utility model is equipped with a powder ejection mechanism, after the grinding is completed, the powder ejection pipe can be impacted by the powder ejection piece when necessary, and the powder adhered to the inner wall of the powder pipe can be used to clean the powder pipe. , Reduce the probability of clogging of the powder outlet pipe, and avoid the waste of food materials at the same time.

In some embodiments, the powder spring member includes a powder spring rod, a handle and a connecting part, the connecting part is rotatably connected to the body, the spring powder rod and the handle are fixedly connected to the connecting part, so The powder ejection rod abuts on the powder outlet pipe, and pulling the handle can drive the powder ejection rod out of the powder outlet pipe, and when the pulling force is removed, the powder ejection rod is on the elastic member Under the action, it returns to the position and hits the powder outlet pipe; the structure of the elastic powder piece is ingenious and reasonable, and the simple structure achieves a good powder cleaning effect.

In some embodiments, the elastic powder mechanism further includes a fixed shaft, and the connecting portion is sleeved on the fixed shaft and can rotate relative to the fixed shaft; the elastic member is a torsion spring, and the torsion spring It is arranged on the fixed shaft, and its two ends feet are respectively against the body and the powder rod. The powder ejection mechanism is simple in structure and reasonable in design, which can ensure the impact force and the powder cleaning effect is good.

In some embodiments, the powder ejection rod is bent from the first end in a direction away from the powder outlet pipe and then folded back, so that the second end of the powder ejection rod faces and abuts against the powder outlet pipe. The first end is an end fixedly connected to the connecting portion. The force of the powder rod can be effectively applied to the powder outlet pipe, and the impact effect is good.

In some embodiments, the driving device of the grinder includes a driving motor, and the rotating shaft of the driving motor is arranged transversely; the grinder of the grinder includes a movable cutter head and a fixed cutter head matched with the movable cutter head; The grinding cavity includes a first cavity section and a second cavity section which are arranged in sequence along the axial direction of the rotating shaft and communicate with each other. The feed port is in communication with the first cavity section. In the second cavity section, the drive motor is connected to the movable cutter head through a screw threaded through the first cavity section and the second cavity section, so that when the movable cutter head is driven to rotate, the screw will drive The material in the first cavity section is brought into the second cavity section. The grinding chamber and the driving device are matched reasonably, which can ensure the continuity and stability of the grinding work.

In some embodiments, the cavity diameter of the second cavity section is larger than the cavity diameter of the first cavity section, so that the end connecting the second cavity section and the first cavity section forms an annular cavity wall, and the The fixed cutter head is fixedly arranged on the annular cavity wall of the second cavity section; the first end of the screw rod located in the second cavity section extends radially outward to form a cutter seat, and the movable cutter head is fixedly arranged On the knife seat, the grinding speed can be increased and the grinding effect can be improved.

In some embodiments, the screw is sleeved on the rotating shaft and can move in the axial direction of the rotating shaft; the grinder further includes:

The adjustment mechanism is used to adjust the axial position of the screw relative to the rotating shaft to adjust the gap between the movable cutter head and the fixed cutter head; through the adjustment mechanism, the particle size of the grinding powder can be adjusted ( Thickness) to meet the needs of users for the consumption and drinking of ground powders of different particle sizes.

In some embodiments, the adjustment mechanism includes a knob and a spring; the body is provided with a screw hole communicating with the grinding cavity, and the screw hole faces the first screw hole located in the second cavity section. At one end, the knob is threadedly connected in the screw hole, and the extended end of the knob abuts against the first end of the screw; the spring is sleeved on the shaft and acts on the screw ；

Wherein, when the knob is screwed in, the screw is pushed to move in the direction of the first cavity section, the spring is compressed, and the gap between the movable cutter head and the fixed cutter head is reduced; the knob is rotated out At this time, the spring pushes the screw to move in the direction of the second cavity section, and the gap between the movable cutter head and the fixed cutter head increases. The adjustment mechanism has a simple structure, is easy to implement, and is convenient to operate.

In some embodiments, the extending end of the knob is provided with a bearing, and the end surface of the outer ring of the bearing abuts against the first end of the screw, so that when the screw is turned, the outer ring of the bearing rotates with the screw, and the bearing The inner ring and the knob remain stationary, the screw receives less rotation resistance to avoid hindering the rotation of the screw; and when the knob is turned, it will not drive the screw to rotate, so that the screw and the knob will not affect each other when they rotate.

In some embodiments, the body further includes a grinding cavity cover, one end of the grinding cavity penetrates one side of the body, so that the end of the grinding cavity forms an open end, and the first end of the screw is directly opposite At the open end, the grinding cavity cover is detachably mounted on the open end by bolts, and the screw hole is provided on the grinding cavity cover. By setting the grinding cavity cover, it is convenient to disassemble and assemble the screw and clean the grinding cavity.

Compared with the prior art, the beneficial effect of the grinder of the embodiment of the present utility model is that by setting the elastic powder mechanism, the powder outlet pipe can be impacted when necessary or on a regular basis, which solves the problem of powder sticking in the powder outlet pipe and reduces The probability of powder plugging in the powder outlet pipe is improved, and the grinding efficiency and use experience are improved.

Description of the drawings

Figure 1 is a partial cross-sectional view of a grinder according to an embodiment of the utility model.

Fig. 2 is a cross-sectional view along the line A-A in Fig. 1.

Fig. 3 is an enlarged view of part B in Fig. 1.

Fig. 4 is a schematic diagram of the state of the grinder of the embodiment of the utility model after the grinding is completed.

Fig. 5 is a schematic diagram of the state where the elastic powder member of the grinder according to the embodiment of the utility model is lifted.

Fig. 6 is a schematic diagram of the elastic powder state of the elastic powder member of the grinder according to the embodiment of the present invention.

Description of reference signs:

10- base; 11-powder cup;

21-Grinding cavity; 22-First cavity section; 23-Second cavity section; 24-Feeding port; 25-Powder outlet pipe; 26-Grinding cavity cover; 27-Bolt;

31-drive motor; 32-fixed cutter head; 33-movable cutter head; 34-screw; 35-tool holder; 36-rotation shaft;

40-powder mechanism; 41-powder rod; 42-handle; 43-connecting part; 44-elastic part; 45-fixed shaft;

50-adjusting mechanism; 51-knob; 52-bearing; 53-spring;

60-material box; 61-material; 62-powder.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below with reference to the drawings and specific implementations.

As shown in Figures 1 and 5, the embodiment of the present invention provides a grinder. The grinder includes a base 10, a body and a grinding mechanism 30; the body is arranged on the base 10, and the body has a grinding cavity 21, The machine body is provided with a feeding port 24 and a powder outlet that are respectively connected to the grinding cavity 21. The powder outlet is connected with a powder outlet pipe 25 suspended above the base 10, and the feeding port 24 is used for feeding into the grinding cavity 21 Material 61, the material 61 can be, for example, coffee beans, soybeans, black beans, sesame, walnuts, etc.; the grinding mechanism 30 includes a driving device arranged on the body and a grinding knife driven by the driving device arranged in the grinding cavity 21. The grinding knife Driven by the driving device, it rotates to grind the material entering the grinding cavity 21 from the feed port 24 into powder 62; the grinder of the embodiment of the present invention further includes a powder ejection mechanism 40, which includes a powder ejection piece and elastic The elastic powder member can be rotatably connected to any position of the grinder, such as the base, the body or the grinding mechanism. The elastic powder member shown in this embodiment is rotatably connected to the body, and the elastic member 44 acts on the elastic powder member , Under the action of the external force, the powder can be moved away from the powder outlet pipe 25, and when the external force is removed, the powder can be reset under the action of the elastic piece 44 and hit the powder pipe 25, so as to store the powder pipe 25 The remaining powder 62 crashed down.

The grinder of the embodiment of the present invention is equipped with an elastic powder mechanism. After the grinding is completed, an elastic member can be used to act on the elastic powder member when necessary to make it hit the powder outlet pipe 25 and bond it to the wall of the powder outlet pipe 25. The powder 62 is knocked off and falls into the powder cup 11 placed on the base 10 and facing the powder outlet pipe 25, achieving the purpose of cleaning the powder outlet pipe 25, reducing the probability of clogging of the powder outlet pipe 25, and avoiding the waste of food materials. .

In some embodiments, continuing to combine FIGS. 1 to 3, the elastic powder member includes an elastic powder rod 41, a handle 42 and a connecting member 43. The connecting member 43 is rotatably connected to the body, and the elastic powder rod 41 and the handle 42 are fixedly connected to the connection On the part 43, the powder ejection rod 41 abuts on the powder outlet pipe 25. When the handle 42 is lifted, the connecting part 43 is driven to rotate. When the connecting part 43 rotates, the powder ejection rod 41 is driven out of the powder outlet pipe 25. 42 When the pulling force is raised, the elastic powder rod 41 returns to the position under the action of the elastic member 44 and hits the powder outlet pipe 25, knocking down the powder 62 remaining in the powder outlet pipe 25; the structure design of the elastic powder piece is ingenious and reasonable. The simple structure achieves a good powder cleaning effect.

Continuing to combine FIGS. 1 to 3, in order to realize the connection of the connecting member 43 on the body, in some embodiments, the elastic powder mechanism 40 further includes a fixed shaft 45, and the connecting member 43 is sleeved on the fixed shaft 45 and can be relatively fixed The shaft 45 rotates; the elastic member 44 is a torsion spring. The torsion spring is arranged on the fixed shaft 45, and the two ends of the torsion spring respectively abut the body and the elastic powder rod 41. When the handle 42 drives the rotating part to rotate around the fixed shaft 45, the torsion spring The spring generates torsion (rotational force). When the external force for the handle 42 is cancelled, the torsion spring releases the torsion force and drives the powder rod 41 to hit the powder outlet pipe 25 to remove the residual powder in the powder outlet pipe 25 and realize the pipeline clean.

The structure of the handle 42 and the structure of the powder ejection rod 41 are not limited, as long as it is easy to operate and has a good powder ejection effect. In some embodiments, as shown in FIGS. 1 and 3, the powder ejection rod 41 is the first The end is bent in the direction away from the powder outlet pipe 25 and then folded back so that the second end of the powder ejection rod 41 is facing and abuts against the powder outlet pipe 25. The entire powder ejection rod 41 is approximately arc-shaped to facilitate the application of force to the powder ejection pipe. Pipe 25; Among them, the end of the elastic powder rod 41 fixedly connected with the connecting portion is its first end, and the end far away from the connecting portion is its second end. Of course, the shape of the powder ejection rod 41 is not limited to this. It can also be a straight rod. In order to facilitate the impact of the powder outlet pipe 25, it can be arranged horizontally, that is, perpendicular to the powder outlet pipe 25, and the outer wall of the straight rod is used to hit the powder outlet pipe. Pipe 25.

Continuing to combine FIGS. 1 and 3, in some embodiments, the driving device includes a driving motor 31, and the rotating shaft 36 of the driving motor 31 is arranged laterally; the grinding knife includes a movable cutter head 33 and a fixed cutter head 32 matched with the movable cutter head 33; The grinding cavity 21 includes a first cavity section 22 and a second cavity section 23 which are arranged in sequence along the axial direction of the rotating shaft 36 and communicate with each other. 61 is connected to the material box 60, the material 61 in the material box 60 can enter the first cavity section 22 through the feed port 24; the powder outlet is in communication with the second cavity section 23, and the powder outlet can be located in the second cavity section 23 directly below. The grinding knife is arranged in the second cavity section 23, and the drive motor 31 is connected to the movable cutter head 33 through the screw 34 passing through the first cavity section 22 and the second cavity section 23, so as to drive the movable cutter head 33 to rotate through the screw 34 brings the material 61 in the first cavity section 22 into the second cavity section 23. For example, the first cavity section 22 may be arranged at a position close to the driving motor 31, the second cavity section 23 may be arranged at a position far away from the driving motor 31, and the feed port 24 may be located directly above the first cavity section 22. The box 60 is arranged directly above the feed port 24 to facilitate the feeding of materials 61 into the first cavity section 22. The screw 34 penetrates the first cavity section 22 and the second cavity section 23 and is connected to the rotating shaft 36 of the driving motor 31 in transmission. , The movable cutter head 33 can be fixedly connected with the screw 34. In this way, when the rotating shaft 36 of the driving motor 31 rotates, the screw 34 and the movable cutter head 33 can be driven to rotate synchronously. During the rotation of the screw 34, the material 61 added to the first cavity section 22 can be brought into the second cavity section 23. The rotating process of the movable cutter head 33 can cooperate with the fixed cutter head 32 to grind the material 61 introduced into the second cavity section 23 into powder 62, and output through the powder outlet and the powder pipe 25 to ensure the continuity and stability of the grinder. .

In some embodiments, as shown in FIGS. 1 and 3, the diameter of the second cavity section 23 is greater than the diameter of the first cavity section 22, and the end of the second cavity section 23 that meets the first cavity section 22 surrounds the first cavity. The section 22 forms an annular cavity wall, and the fixed cutter head 32 is arranged in the second cavity section 23 and fixed on the annular cavity wall. The fixed cutter head 32 can be an annular cutter head or can be composed of several independent sub-tool heads. , The sub cutter head can be arranged along the annular cavity wall. The first end of the screw 34 located in the second cavity section 23 extends radially outward to form a knife seat 35. The knife seat 35 may be in the shape of a disc. The cutter heads 32 are opposed to each other so that the two can cooperate for grinding; the movable cutter head 33 can also have a ring shape or be composed of several independent sub-tool heads. The first cavity section 22 is used for conveying the material 61. While meeting the continuity and stability of the conveying of the material 61, the first cavity section 22 is designed to be smaller in size to save space. The second cavity section 23 is used for conveying materials. For the grinding of 61, the size of the second cavity section 23 is designed to be larger, which can accommodate the larger fixed cutter head 32 and the movable cutter head 33, which can increase the grinding speed and improve the grinding effect.

In some embodiments, the screw 34 can be sleeved on the rotating shaft 36 of the drive motor 31 and can move in the axial direction of the rotating shaft 36; the grinder further includes: an adjusting mechanism 50 for adjusting the screw 34 on the rotating shaft 36 in the axial direction to adjust the gap between the movable cutter head 33 and the fixed cutter head 32, and then the particle size (thickness) of the powder 62 formed by grinding can be adjusted to meet the needs of users for the powder 62 of different particle sizes. Food or drinking needs.

In the specific implementation process, the adjustment mechanism 50 can have various forms. A specific implementation of the adjustment mechanism 50 will be described in detail below with reference to FIGS. 1 and 3 to 6. The adjustment mechanism 50 includes a knob 51 and a reset member. The body is provided with a screw hole. The screw hole is opposite to the first end of the screw 34 located in the second cavity section 23. The knob 51 is threadedly connected in the screw hole, and the knob 51 extends into One end of the screw hole abuts against the first end of the screw 34, and the resetting member may be a spring 53. The spring 53 is sleeved on the rotating shaft 36 and abuts the screw 34 to apply a reset elastic force to the screw 34. When the knob 51 is screwed into the screw hole, the screw 34 is pushed to move in the direction of the first cavity section 22 to reduce the gap between the movable cutter head 33 and the fixed cutter head 32. At the same time, the spring 53 is compressed, and the small gap makes the ground The powder 62 is smaller; when the knob 51 is unscrewed, the spring 53 releases the compression potential energy, and the spring 53 pushes the screw 34 to move in the direction of the second cavity section 23, so that the gap between the movable cutter head 33 and the fixed cutter head 32 increases, and the grinding The resulting powder 62 has larger particles. The adjustment mechanism 50 has a simple structure, is easy to implement, and is convenient to operate.

In some embodiments, as shown in Figures 1 and 3, the machine body further includes a grinding chamber cover 26. One end of the grinding chamber 21 penetrates one side of the machine body, so that the end of the grinding chamber 21 forms an open end. One end faces the open end, the grinding chamber cover 26 is detachably installed on the open end by bolts 27, and the screw holes are provided on the grinding chamber cover 26. By setting the grinding chamber cover 26, it is convenient to disassemble and align the screw 34 Cleaning of the grinding chamber 21.

In a preferred embodiment, the adjustment mechanism 50 may further include a bearing 52. As shown in FIGS. 1 and 3, the bearing 52 is sleeved outside one end of the knob 51 that extends into the screw hole, and makes the inner ring of the bearing 52 and This end is fixedly connected, the end surface of the outer ring of the bearing 52 abuts the end surface of the first end of the screw 34, and the two form a sliding contact to reduce friction. In this way, when the screw 34 rotates, the outer ring of the bearing 52 will rotate. The inner ring of 52 and the knob 51 remain stationary, which can prevent the knob 51 from increasing the rotation resistance of the screw 34 and ensure the smooth rotation of the screw 34. When the knob 51 is turned, the screw 34 will not be driven to rotate, making the screw 34 and Both of the knobs 51 will not affect each other when they are turned.

As shown in Figure 4, when grinding, the material 61 to be ground is loaded into the material box 60, the driving mechanism is started, and the grinding knife is driven to grind. The ground powder 62 enters the powder placed on the base 10 through the powder outlet pipe 25. In the cup 11; when the grinding is completed, if there is powder residue or accumulation in the powder outlet pipe 25, as shown in Figure 5, pull the handle 42 to make the powder ejection rod 41 separate from the powder outlet pipe 25; When the handle 42 is opened, the powder ejection rod 41 hits the powder outlet pipe 25, the powder in the powder outlet pipe 25 falls into the powder cup 11, and the powder outlet pipe 25 is cleaned to achieve the purpose of powder cleaning.

The grinder according to the embodiment of the present utility model installs the powder outlet pipe 25 at a suitable position. After the powder is milled, the powder outlet pipe 25 can be struck by the spring powder piece when necessary or periodically after the powder is ground. 25. The powder on the inner wall is shaken off the inner wall of the pipe under the action of impact, which achieves a cleaning effect and reduces the probability of powder blocking.

The above embodiments are only exemplary embodiments of the present utility model, and are not used to limit the present utility model. The protection scope of the present utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the utility model within the essence and protection scope of the utility model, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the utility model.

Claims (10)

A grinding machine includes a base, a body, and a grinding mechanism. The body has a grinding cavity, and the body is provided with a feed port and a powder outlet respectively connected to the grinding cavity, and the powder outlet is connected with A powder outlet pipe suspended above the base; characterized in that, the grinder further includes: The elastic powder mechanism includes an elastic powder member and an elastic member, the elastic powder member is rotatably connected to the base, the body or the grinding mechanism, and the elastic member acts on the elastic powder member to make the elastic powder When the external force of the powder member away from the powder outlet pipe is removed, the powder elastic member resets and hits the powder outlet pipe. The grinder according to claim 1, wherein the elastic powder member comprises an elastic powder rod, a handle and a connecting part, the connecting part is rotatably connected to the body, and the elastic powder rod and the handle are fixedly connected On the connecting portion, the powder ejection rod abuts on the powder outlet pipe, and pulling the handle can drive the powder ejection rod to leave the powder outlet pipe, and when the pulling force is withdrawn, the ejector The powder rod returns to the position under the action of the elastic member and hits the powder outlet pipe. The grinder according to claim 2, wherein the elastic powder mechanism further comprises a fixed shaft, and the connecting portion is sleeved on the fixed shaft and can rotate relative to the fixed shaft; the elastic member It is a torsion spring, and the torsion spring is arranged on the fixed shaft, and the two ends of the torsion spring are respectively pressed against the body and the elastic powder rod. The grinder according to claim 2, wherein the elastic powder rod is bent from the first end in a direction away from the powder outlet pipe and then folded back, so that the second end of the elastic powder rod faces and abuts In the powder outlet pipe, the first end is an end fixedly connected to the connecting portion. The grinder according to claim 1, wherein the driving device of the grinder comprises a driving motor, and the rotating shaft of the driving motor is arranged transversely; the grinder of the grinder includes a movable cutter head and A fixed cutter head matched with a cutter head; the grinding cavity includes a first cavity section and a second cavity section that are arranged in sequence along the axial direction of the rotating shaft and communicate with each other, and the feed port is in communication with the first cavity section, The grinding knife is arranged in the second cavity section, and the driving motor is connected to the movable cutter head through a screw threaded through the first cavity section and the second cavity section to drive the movable cutter head. When rotating, the material in the first cavity section is brought into the second cavity section through the screw. The grinder according to claim 5, wherein the cavity diameter of the second cavity section is greater than the cavity diameter of the first cavity section, so that the second cavity section is connected to the first cavity section. One end forms an annular cavity wall, the fixed cutter head is fixed on the annular cavity wall of the second cavity section; the first end of the screw located in the second cavity section extends radially outward to form a cutter seat , The movable cutter head is fixed on the cutter seat. The grinder according to claim 5, wherein the screw is sleeved on the rotating shaft and can move in the axial direction of the rotating shaft; the grinder further comprises: An adjustment mechanism is used to adjust the axial position of the screw relative to the rotating shaft to adjust the gap between the movable cutter head and the fixed cutter head. The grinder according to claim 7, wherein the adjusting mechanism includes a knob and a spring; the body is provided with a screw hole communicating with the grinding cavity, and the screw hole is located at the opposite side of the screw. In the first end of the second cavity section, the knob is threadedly connected in the screw hole, and the extending end of the knob abuts against the first end of the screw; the spring is sleeved on the shaft And act on the screw; Wherein, when the knob is screwed in, the screw is pushed to move in the direction of the first cavity section, the spring is compressed, and the gap between the movable cutter head and the fixed cutter head is reduced; the knob is rotated out At this time, the spring pushes the screw to move in the direction of the second cavity section, and the gap between the movable cutter head and the fixed cutter head increases. The grinder according to claim 8, wherein the extending end of the knob is provided with a bearing, and the end surface of the outer ring of the bearing abuts against the first end of the screw. The grinder according to claim 8, wherein the body further comprises a grinding cavity cover, one end of the grinding cavity penetrates one side of the body, so that the end of the grinding cavity forms an open end, The first end of the screw is directly opposite to the open end, the grinding chamber cover is detachably installed on the open end by bolts, and the screw hole is provided on the grinding chamber cover.

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