Detachable hand-operated grinding machine

Abstract

The utility model discloses a detachable hand-operated grinding machine which comprises a main shell, the upper end of the main shell is movably connected with an end cover, the top of the end cover is provided with a hand-operated structure, the hand-operated structure is in transmission connection with a grinding assembly through a transmission assembly, and the lower end of the main shell is detachably connected with a powder bin. A center hole is formed in a mounting plate in a main shell, an upper bearing, an upper bearing tube, the center hole, a lower bearing tube and a lower bearing are sequentially sleeved on the surface of the middle of a main shaft of a transmission assembly, steps are arranged at the lower end of the upper bearing tube and the upper end of the lower bearing tube, and step patterns of the upper bearing tube are riveted with the top end of the center hole. The step pattern of the lower bearing tube is riveted with the bottom end of the center hole, so that the concentricity of the whole machine body can be kept consistent through the structure, the problem of the concentricity of a machine body structure of an existing grinding machine is solved, all parts of the machine body of the grinding machine are detachable, the parts are convenient to clean and replace, in addition, the machine body parts are formed through one-time machining, and the machining cost is reduced. The stability of the machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinders, in particular to a detachable hand-cranked grinder. Background Art

[0002] With the increasing emphasis on diet health, people increasingly choose to process food materials by themselves in daily life. When processing foods such as grains, coffee, soybeans, and dried fruits, a grinder is often needed to grind them into powder for brewing. Compared with the cooking method, the nutrients in the food can be retained to a greater extent.

[0003] Currently, hand-cranked grinders are widely selected for daily household food grinding. However, the concentricity error of the body structure of the existing hand-cranked grinders on the market is relatively large. Inevitably, secondary positioning errors will occur when machining the bearing hole positions at the other end, resulting in the inability to machine the two bearing ends simultaneously in the traditional structure. Moreover, almost all current hand-cranked grinders adopt a profile aluminum structure, and this structure cannot effectively solve the consistency of the concentricity of the cutter head grinding core / upper and lower bearings. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a detachable hand-cranked grinder to solve the problem of the concentricity of the body structure of the current grinder, and at the same time realize the replacement of the grinding tool.

[0005] To achieve the above purpose, the utility model provides a detachable hand-cranked grinder, which includes a main housing. The upper end of the main housing is movably connected with an end cover. A hand-cranking structure is arranged on the top of the end cover. A vertical mounting plate is arranged inside the main housing. A transmission component is mounted on the mounting plate. The top of the transmission component is connected with the hand-cranking structure. A grinding component is arranged inside the main housing. The hand-cranking structure is in transmission connection with the grinding component through the transmission component. A powder bin is detachably connected to the lower end of the main housing.

[0006] The transmission component includes a main shaft. The upper end of the main shaft extends into the end cover, and the end of the upper end of the main shaft is in threaded connection with the end cover. A central hole is opened on the mounting plate. The lower end of the main shaft penetrates through the grinding component and extends to its bottom, and the lower end of the main shaft is detachably connected with the grinding component. The surface of the middle part of the main shaft is successively sleeved with a bearing flange, a bearing sleeve, an upper bearing, an upper bearing tube, a central hole, a lower bearing tube, a lower bearing, and a spring from top to bottom. The upper bearing tube is arranged at the top of the central hole, and the lower bearing tube is arranged at the bottom of the central hole. The upper bearing is arranged inside the upper bearing tube, and the lower bearing is arranged inside the lower bearing tube. Steps are provided at the lower end of the upper bearing tube and the upper end of the lower bearing tube. The stepped pattern of the upper bearing tube is riveted to the top end of the central hole, and the stepped pattern of the lower bearing tube is riveted to the bottom end of the central hole.

[0007] The grinding assembly includes a tool housing, an inner grinding tool, an outer grinding tool, a tool flange, a dial, and a knob. The inner grinding tool, the dial, and the knob are sleeved on the surface of the main shaft from top to bottom. The bottom end of the main shaft extends into the central hole of the knob. The surface of the tool housing is provided with a first thread and is connected to the inner surface teeth of the main housing through the first thread. The outer grinding tool is sleeved inside the tool housing, and a sliding column is provided on the outer wall of the outer grinding tool. A sliding groove corresponding to the sliding column is opened on the inner wall of the tool housing. The bottom of the outer grinding tool is connected to the tool flange. The central hole of the tool flange is sleeved with the dial. The tool flange is detachably connected to the top of the inlet of the powder bin. The outer surface of the tool flange is provided with a second thread and is connected to the inner surface teeth of the main housing through the second thread. The inner grinding tool is sleeved inside the outer grinding tool. The dial is installed at the bottom of the inner grinding tool. A first installation groove for installing the knob is opened at the bottom of the dial. The knob is sleeved on the lower end of the main shaft through the limiting hole in the center. The diameter of the limiting hole is smaller than the diameter of the shaft part of the main shaft.

[0008] Preferably, the bearing flange is installed between the end cover and the bearing sleeve. A threaded groove for installing the main shaft is opened at the bottom of the end cover. The inner ring of the bearing flange is sleeved on the main shaft and its outer ring extends into the threaded groove. The bearing is sleeved at the bottom of the central hole of the bearing flange.

[0009] Preferably, connectors are installed at the tops on both sides of the pipeline of the bearing flange. The top ends of the connectors penetrate through the end cover and are connected to the hand-cranked structure.

[0010] Preferably, second installation grooves are opened in both the upper bearing pipe and the lower bearing pipe. The notch directions of the second installation grooves in the upper bearing pipe and the lower bearing pipe are opposite, and are downward and upward respectively.

[0011] Preferably, the upper bearing is installed in the second installation groove of the upper bearing pipe, and the lower bearing is installed in the second installation groove of the lower bearing pipe.

[0012] Preferably, the spring is installed between the lower bearing pipe and the inner grinding tool. The top of the spring abuts against the inner surface of the second installation groove of the lower bearing pipe, and the bottom of the spring abuts against the top end of the inner grinding tool.

[0013] Preferably, a grinding channel with a gradually narrowing cross-section from top to bottom is provided between the inner grinding tool and the outer grinding tool. An outlet for powder is provided between the dial and the central hole of the tool flange. The bottom of the grinding channel is communicated with the top of the outlet for powder, and the bottom of the outlet for powder is communicated with the powder bin.

[0014] Preferably, a connecting block is fixedly connected to the surface of the dial. A first connecting groove corresponding to the first connecting block is opened at the bottom of the inner grinding tool.

[0015] Preferably, two third mounting grooves are symmetrically formed on the surface of the knob about the center. Elastic members are connected to the bottoms of the two third mounting grooves. Elastic balls are connected to the tops of the elastic members. The elastic members are arranged at the openings of the third mounting grooves.

[0016] Preferably, arc grooves corresponding to the elastic balls are symmetrically arranged on the inner surface of the first mounting groove at the bottom of the dial.

[0017] Preferably, a plurality of second connection grooves are symmetrically formed on the bottom of the tool flange about the center hole. A plurality of second connection blocks corresponding to the second connection grooves are arranged along the edge of the powder bin inlet.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] (1) A center hole is formed in the mounting plate of the present utility model. An upper bearing, an upper bearing pipe, the center hole, a lower bearing pipe and a lower bearing are successively sleeved on the middle surface of the main shaft. The upper bearing pipe is arranged at the top of the center hole, and the lower bearing pipe is arranged at the bottom of the center hole. The upper bearing is arranged in the upper bearing pipe, and the lower bearing is arranged in the lower bearing pipe. Steps are provided at the lower end of the upper bearing pipe and the upper end of the lower bearing pipe. The stepped pattern of the upper bearing pipe is riveted to the top end of the center hole, and the stepped pattern of the lower bearing pipe is riveted to the bottom end of the center hole. With such a structure, the concentricity of the whole fuselage can be kept consistent, thus solving the problem of the concentricity of the fuselage structure of the current grinding machine.

[0020] (2) The lower end of the main housing of the present utility model is detachably connected with a powder bin. The tool flange is detachably connected to the top of the inlet of the powder bin. The bottom of the external grinding tool is connected to the tool flange. Both the tool housing and the tool flange are connected to the inner surface teeth of the main housing through the threads on their surfaces. The external grinding tool is sleeved inside the tool housing, and the internal grinding tool is sleeved inside the external grinding tool. The central hole of the tool flange is sleeved with a scale disk, and the knob is installed in the first installation groove at the bottom of the scale disk. At the same time, the internal grinding tool, the scale disk, and the knob are sleeved on the surface of the main shaft from top to bottom. A spring is installed between the lower bearing tube and the internal grinding tool. Thus, after disassembling the powder bin from the main housing, under the action of the spring compression and rebound force, the knob, the scale disk, and the internal grinding tool are detached and separated from the main housing together. Subsequently, by rotating the tool flange with the second thread, the tool flange together with the tool housing and the external grinding tool is detached and separated from the main housing. The sliding column of the tool flange slides in the sliding groove of the tool housing, causing the tool flange together with the external grinding tool to be separated from the tool housing. Without the resistance of the spring, the lower bearing tube and the lower bearing inside it are also detached and separated from the main housing. The main shaft is no longer fixed inside the main housing and is detached and separated from the main housing together with the bearing sleeve, bearing flange, upper bearing, upper bearing tube, end cover, and hand-crank structure connected to the main shaft, thereby realizing the disassembly of all components of the grinding machine body to facilitate cleaning and replacement of components, especially for easily replacing, installing, and cleaning the internal grinding tool and the external grinding tool. Moreover, the body components are all machined in one go, improving the stability of the machine. Such an engineering structure design can not only reduce resource waste but also enable the recycling of all components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0023] Figure 2 It is an exploded view of this embodiment.

[0024] Figure 3 It is a front sectional view of this embodiment.

[0025] Figure 4 For Figure 3 The enlarged view of part A.

[0026] Figure 5 For Figure 3 The enlarged view of part B.

[0027] Figure 6 Schematic diagram of the main housing structure of this embodiment.

[0028] In the figure: main housing 1, end cover 2, threaded groove 201, hand-cranked structure 3, mounting plate 4, grinding assembly 5, tool housing 501, first thread 5011, sliding groove 5012, inner grinding tool 502, first connection groove 5021, outer grinding tool 503, sliding column 5031, tool flange 504, second thread 5041, second connection groove 5042, scale disk 505, first mounting groove 5051, first connection block 5052, arc-shaped groove 5053, knob 506, third mounting groove 5061, elastic member 5062, elastic ball 5063, powder bin 6, second connection block 601, main shaft 7, bearing flange 8, bearing sleeve 9, upper bearing 10, upper bearing tube 11, lower bearing tube 12, lower bearing 13, spring 14, central hole 15, second mounting groove 16, grinding channel 17, powder outlet 18, connecting member 19. Detailed implementation manners

[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the embodiments of the present utility model, and should not be construed as a limitation to the present utility model.

[0030] In the description of the embodiments of the present utility model, it should be understood that if there are directional indications involved in the embodiments of the present utility model, such as the upper, lower, left, right, front, rear, inner, outer, etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0032] In the embodiments of the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body. It may be a mechanical connection or an electrical connection. It may be a direct connection or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] As Figures 1 - 6 shown, the embodiments of the present utility model provide a detachable hand-cranked grinder, which includes a main housing 1. A cover 2 is movably connected to the upper end of the main housing 1. A hand-cranking structure 3 is arranged on the top of the cover 2. A vertical mounting plate 4 is arranged inside the main housing 1. A transmission assembly is mounted on the mounting plate 4. The top of the transmission assembly is connected to the hand-cranking structure 3. A grinding assembly 5 is arranged inside the main housing 1. The hand-cranking structure 3 is in transmission connection with the grinding assembly 5 through the transmission assembly. A powder bin 6 is detachably connected to the lower end of the main housing 1;

[0034] The transmission assembly includes a main shaft 7. The upper end of the main shaft 7 extends into the inside of the cover 2, and the upper end of the main shaft 7 is threadedly connected to the cover 2. A central hole 15 is formed in the mounting plate 4. The lower end of the main shaft 7 penetrates through the grinding assembly 5 and extends to its bottom, and the lower end of the main shaft 7 is detachably connected to the grinding assembly 5. The middle surface of the main shaft 7 is successively sleeved with a bearing flange 8, a bearing sleeve 9, an upper bearing 10, an upper bearing tube 11, the central hole 15, a lower bearing tube 12, a lower bearing 13, and a spring 14 from top to bottom. The upper bearing tube 11 is arranged at the top of the central hole 15, and the lower bearing tube 12 is arranged at the bottom of the central hole 15. The upper bearing 10 is arranged inside the upper bearing tube 11, and the lower bearing 13 is arranged inside the lower bearing tube 12. Steps are provided at the lower end of the upper bearing tube 11 and the upper end of the lower bearing tube 12. The stepped pattern of the upper bearing tube 11 is riveted to the top end of the central hole 15, and the stepped pattern of the lower bearing tube 12 is riveted to the bottom end of the central hole 15;

[0035] The grinding assembly 5 includes a tool housing 501, an inner grinding tool 502, an outer grinding tool 503, a tool flange 504, a dial 505, and a knob 506. The inner grinding tool 502, the dial 505, and the knob 506 are sleeved on the surface of the main shaft 7 from top to bottom. The bottom end of the main shaft 7 extends into the central hole 15 of the knob 506. The surface of the tool housing 501 is provided with a first thread 5011 and is tooth-connected to the inner surface of the main housing 1 through the first thread 5011. The outer grinding tool 503 is sleeved inside the tool housing 501, and a sliding column 5031 is provided on the outer wall of the outer grinding tool 503. A sliding groove 5012 corresponding to the sliding column 5031 is opened on the inner wall of the tool housing 501, so that the outer grinding tool 503 is slidably connected to the inner wall of the tool housing 501. The bottom of the outer grinding tool 503 is connected to the tool flange 504. The tool flange 504 is sleeved with the dial 505. The tool flange 504 is detachably connected to the top of the inlet of the powder bin 6. A second thread 5041 is provided on the outer surface of the tool flange 504 and is tooth-connected to the inner surface of the main housing 1 through the second thread 5041. The inner grinding tool 502 is sleeved inside the outer grinding tool 503. The dial 505 is installed at the bottom of the inner grinding tool 502. A first installation groove 5051 for installing the knob 506 is opened at the bottom of the dial 505. The knob 506 is sleeved on the lower end of the main shaft 7 through the limiting hole in the center. The diameter of the limiting hole is smaller than the diameter of the shaft part of the main shaft 7.

[0036] In this embodiment, as Figure 3 shown, the bearing flange 8 is installed between the end cover 2 and the bearing sleeve 9. A threaded groove 201 for installing the main shaft 7 is opened at the bottom of the end cover 2. The inner ring of the bearing flange 8 is sleeved on the main shaft 7 and its outer ring extends into the threaded groove 201. The bearing sleeve 9 is sleeved at the bottom of the central hole 15 of the bearing flange 8.

[0037] In this embodiment, as Figure 3 shown, connecting pieces 19 are installed on both sides of the pipeline of the bearing flange 8. The top ends of the connecting pieces 19 penetrate through the end cover 2 and are connected to the hand-cranking structure 3

[0038] Specifically, the setting of the bearing flange 8 is also for supporting the hand-cranking structure 3, and the setting of the connecting pieces 19 realizes the connection between the end cover 2 and the hand-cranking structure 3.

[0039] In this embodiment, as Figure 3 shown, both the upper bearing pipe 11 and the lower bearing pipe 12 are provided with second installation grooves 16. The notch directions of the second installation grooves 16 of the upper bearing pipe 11 and the lower bearing pipe 12 are opposite, and are downward and upward respectively. The upper bearing 10 is installed in the second installation groove 16 of the upper bearing pipe 11, and the lower bearing 13 is installed in the second installation groove 16 of the lower bearing pipe 12.

[0040] Specifically, the bearing is arranged inside the bearing pipe, so that the upper and lower bearing pipes 12 sleeved on the main shaft 7 abut against the top and bottom of the central hole 15 of the mounting plate 4, and are riveted to the central hole 15 in combination with its stepped pattern, so as to keep the concentricity of the whole fuselage consistent, thus solving the problem of the concentricity of the fuselage structure of the current grinding machine.

[0041] In this embodiment, as Figure 3 shown, the spring 14 is installed between the lower bearing pipe 12 and the inner grinding tool 502. The top of the spring 14 abuts against the inner surface of the second installation groove 16 of the lower bearing pipe 12, and the bottom of the spring 14 abuts against the top end of the inner grinding tool 502.

[0042] Specifically, when the grinding machine is assembled, the spring 14 applies pressure to the lower bearing pipe 12, so that the lower bearing pipe 12 abuts more stably against the bottom of the mounting plate 4, and also generates a thrust on the inner grinding tool 502. Once the powder bin 6 is separated from the main housing 1, the inner grinding tool 502 together with the knob 506 and the scale disk 505 are disassembled and separated from the main housing 1, which is convenient for disassembling components.

[0043] In this embodiment, as Figure 3 shown, a grinding channel 17 with a gradually narrowing cross-section from top to bottom is provided between the inner grinding tool 502 and the outer grinding tool 503. An outlet 18 is provided between the scale disk 505 and the tool flange 504. The bottom of the grinding channel 17 is communicated with the top of the outlet 18, and the bottom of the outlet 18 is communicated with the powder bin 6.

[0044] Specifically, after the inner grinding tool 502 and the outer grinding tool 503 grind the food into powder, the powder drops into the powder bin 6 from the outlet 18.

[0045] In this embodiment, as Figure 3 shown, a first connecting block 5052 is fixedly connected to the surface of the scale disk 505, and a first connecting groove 5021 corresponding to the first connecting block 5052 is formed at the bottom of the inner grinding tool 502, so as to realize the connection between the inner grinding tool 502 and the scale disk 505.

[0046] In this embodiment, as Figure 5 shown, two third installation grooves 5061 are symmetrically formed on the surface of the knob 506 about the center. Elastic members 5062 are connected to the bottoms of the two third installation grooves 5061. Elastic balls 5063 are connected to the tops of the elastic members 5062. The elastic members 5062 are arranged at the openings of the third installation grooves 5061. Arc-shaped grooves 5053 corresponding to the elastic balls 5063 are symmetrically arranged on the inner surface of the first installation groove 5051 at the bottom of the scale disk 505.

[0047] Specifically, the elastic members 5062, the elastic balls 5063 and the arc-shaped grooves 5053 are provided to buffer the vibration caused by the rotation of the inner grinding tool 502.

[0048] In this embodiment, as Figure 3 shown, a plurality of second connection grooves 5041 are symmetrically arranged at the bottom of the tool flange 504 with respect to the central hole 15, and a plurality of second connection blocks 601 corresponding to the second connection grooves 5041 are arranged along the edge of the inlet of the powder bin 6, so as to strengthen the detachable connection between the main housing 1 and the powder bin 6.

[0049] Principle of this embodiment: The operator first rotates the hand-cranked structure 3 counterclockwise, and the end cover also rotates counterclockwise, so that the end cover 2 is separated from the main shaft 7, and the end cover 2 is also separated from the main housing 1. Then, the end cover 2 is opened, and the food to be ground is added from the upper end of the main housing 1 and sent along the inner wall of the main housing 1 to the grinding channel 17 in the tool housing 501. Then, the end cover 2 is re-covered, and the upper end of the main shaft 7 is aligned with the threaded groove at the bottom of the end cover 2. The hand-cranked structure 3 is rotated clockwise, so that the end cover 2 is connected to the main shaft 7. The hand-cranked structure 3 is continuously rotated clockwise, so that the main shaft 7 also rotates. The rotation of the main shaft 7 drives the grinding inner tool 502 sleeved on the surface of the main shaft 7 to rotate, and the food in the grinding channel 17 is also ground accordingly. As the food becomes smaller and smaller, the food falls to a lower position in the grinding channel 17 until the food is crushed. The crushed food exits from the grinding channel 17 and falls into the powder bin 6 from the powder outlet 18, thereby realizing the grinding of the food.

[0050] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detachable hand-cranked grinder, comprising a main housing (1), an end cover (2) is movably connected to the upper end of the main housing (1), a hand-cranking structure (3) is arranged on the top of the end cover (2), a vertical mounting plate (4) is arranged inside the main housing (1), a transmission assembly is mounted on the mounting plate (4), the top of the transmission assembly is connected to the hand-cranking structure (3), a grinding assembly (5) is arranged inside the main housing (1), the hand-cranking structure (3) is in transmission connection with the grinding assembly (5) through the transmission assembly, and a powder bin (6) is detachably connected to the lower end of the main housing (1); The transmission assembly includes a main shaft (7), the upper end of the main shaft (7) extends into the end cover (2), and the upper end of the main shaft (7) is threadedly connected to the end cover (2). A central hole (15) is formed in the mounting plate (4). The lower end of the main shaft (7) penetrates through the grinding assembly (5) and extends to its bottom, and the lower end of the main shaft (7) is detachably connected to the grinding assembly (5). The surface of the middle part of the main shaft (7) is successively sleeved with a bearing flange (8), a bearing sleeve (9), an upper bearing (10), an upper bearing tube (11), the central hole (15), a lower bearing tube (12), a lower bearing (13) and a spring (14) from top to bottom. The upper bearing tube (11) is arranged at the top of the central hole (15), the lower bearing tube (12) is arranged at the bottom of the central hole (15), the upper bearing (10) is arranged inside the upper bearing tube (11), the lower bearing (13) is arranged inside the lower bearing tube (12), steps are provided at the lower end of the upper bearing tube (11) and the upper end of the lower bearing tube (12), the stepped pattern of the upper bearing tube (11) is riveted to the top end of the central hole (15), and the stepped pattern of the lower bearing tube (12) is riveted to the bottom end of the central hole (15); The grinding assembly (5) includes a tool housing (501), an inner grinding tool (502), an outer grinding tool (503), a tool flange (504), a dial (505) and a knob (506). The inner grinding tool (502), the dial (505) and the knob (506) are sleeved on the surface of the main shaft (7) from top to bottom. The bottom end of the main shaft (7) extends into the central hole (15) of the knob (506). The surface of the tool housing (501) is provided with a first thread (5011) and is tooth-connected to the inner surface of the main housing (1) through the first thread (5011). The outer grinding tool (503) is sleeved in the tool housing (501), and a sliding column (5031) is provided on the outer wall of the outer grinding tool (503). A sliding groove (5012) corresponding to the sliding column (5031) is opened on the inner wall of the tool housing (501). The bottom of the outer grinding tool (503) is connected to the tool flange (504). The central hole (15) of the tool flange (504) is sleeved with the dial (505). The tool flange (504) is detachably connected to the top of the inlet of the powder bin (6). A second thread (5041) is provided on the outer surface of the tool flange (504) and is tooth-connected to the inner surface of the main housing (1) through the second thread (5041). The inner grinding tool (502) is sleeved inside the outer grinding tool (503). The dial (505) is installed at the bottom of the inner grinding tool (502). A first installation groove (5051) for installing the knob (506) is opened at the bottom of the dial (505). The knob (506) is sleeved on the lower end of the main shaft (7) through the limiting hole in the center. The diameter of the limiting hole is smaller than the diameter of the shaft part of the main shaft (7).

2. The detachable hand-cranked grinder according to claim 1, wherein The bearing flange (8) is installed between the end cover (2) and the bearing sleeve (9). A threaded groove for installing the main shaft (7) is opened at the bottom of the end cover (2). The inner ring of the bearing flange (8) is sleeved on the main shaft (7) and its outer ring extends into the threaded groove (201). The bearing sleeve (9) is connected to the bottom of the central hole (15) of the bearing flange (8).

3. A detachable hand-cranked grinder according to claim 1, characterized in that, Connectors (19) are installed at the tops on both sides of the pipeline of the bearing flange (8). The top ends of the connectors (19) penetrate through the end cover (2) and are connected to the hand-cranking structure (3).

4. A detachable hand-cranked grinder according to claim 1, wherein, Both the upper bearing pipe (11) and the lower bearing pipe (12) are provided with second installation grooves (16). The notch directions of the second installation grooves (16) of the upper bearing pipe (11) and the lower bearing pipe (12) are opposite, and are downward and upward respectively. The upper bearing (10) is installed in the second installation groove (16) of the upper bearing pipe (11). The lower bearing (13) is installed in the second installation groove (16) of the lower bearing pipe (12).

5. A detachable hand-cranked grinder according to claim 1, characterized in that, The spring (14) is installed between the lower bearing pipe (12) and the inner grinding tool (502). The top of the spring (14) abuts against the inner surface of the second installation groove (16) of the lower bearing pipe (12). The bottom of the spring (14) abuts against the top end of the inner grinding tool (502).

6. A detachable hand-cranked grinder according to claim 1, characterized in that, A grinding channel (17) with a gradually narrowing cross-section from top to bottom is provided between the inner grinding tool (502) and the outer grinding tool (503). An outlet port (18) is provided between the dial (505) and the central hole (15) of the tool flange (504). The bottom of the grinding channel (17) communicates with the top of the outlet port (18), and the bottom of the outlet port (18) communicates with the powder bin (6).

7. A detachable hand-cranked grinder according to claim 1, characterized in that, A first connecting block (5052) is fixedly connected to the surface of the dial (505), and a first connecting groove (5021) corresponding to the first connecting block (5052) is provided at the bottom of the inner grinding tool (502).

8. A detachable hand-cranked grinder according to claim 1, characterized in that, Two third mounting grooves (5061) are symmetrically provided on the surface of the knob (506) with respect to the center. Elastic members (5062) are connected to the bottoms of the two third mounting grooves (5061). An elastic ball (5063) is connected to the top of the elastic member (5062), and the elastic member (5062) is provided at the notch of the third mounting groove (5061).

9. A detachable hand-cranked grinder according to claim 1, characterized in that, Arc-shaped grooves (5053) corresponding to the elastic balls (5063) are symmetrically provided on the inner surface of the first mounting groove (5051) at the bottom of the dial (505).

10. A detachable hand-operated grinder according to claim 1, wherein, A number of second connecting grooves (5042) are symmetrically provided at the bottom of the tool flange (504) with respect to the central hole (15). A number of second connecting blocks (601) corresponding to the second connecting grooves (5042) are provided along the edge of the inlet of the powder bin (6).

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