Powder grinding device

Abstract

The utility model discloses a powder grinding device which comprises a storage shell, a rotary table is movably arranged in the storage shell, and a grinding assembly is arranged on the side wall of the rotary table. The grinding assembly comprises a hollow roller rotationally connected to the side wall of the rotary table and a fixed shaft coaxially arranged with the hollow roller and fixed to the side wall of the rotary table, a cam is fixed to the outer wall of the fixed shaft, and a plurality of knocking vibration assemblies are arranged on the inner side of the hollow roller; and the knocking vibration assembly comprises a shell welded to the inner wall of the hollow roller and an impacting piece connected to the inner wall of the shell in a sliding mode, and a limiting rod is fixed to the inner side of the impacting piece and movably matched with the outer surface of the cam in a limiting mode. According to the utility model, the cam, the limiting rod and the impact piece are arranged, so that the hollow roller can be vibrated by impacting the shell while static-pressure grinding is carried out on the hollow roller, and the vibration direction is downward, so that the grinding and crushing effects on relatively hard materials can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding, in particular to a powder grinding device. Background Art

[0002] For the chemical industries such as paints and cosmetics, there are liquid materials and powder materials in their raw materials. During production, the powder materials need to be ground and then mixed for use after meeting the fineness requirements.

[0003] After retrieval, a patent with the Chinese patent publication number CN219580717U discloses a powder grinding device, which includes a bracket for carrying the powder grinding device; a grinding mechanism arranged on the bracket. The grinding mechanism includes a grinding roller and a grinding disc. The grinding roller is in contact with the bottom surface of the grinding disc, and the grinding roller rotates around the grinding disc in the grinding disc; at least one convex portion is arranged radially on the grinding roller, and a groove is arranged on the bottom surface of the grinding disc corresponding to the convex portion of the grinding roller. When grinding the powder, the powder is placed in the groove opened on the bottom surface of the grinding cavity, and the convex portion of the grinding roller is used to grind the powder. The extruded powder will fall into the groove along the inclined surface of the groove.

[0004] The above patent has the following deficiencies: it completely uses the static pressure between the grinding roller and the grinding disc to achieve grinding and crushing. In this way, when dealing with relatively hard materials, the grinding effect is poor.

[0005] Therefore, the utility model provides a powder grinding device. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a powder grinding device is proposed.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A powder grinding device includes a storage shell, a turntable is movably arranged inside the storage shell, and a grinding assembly is arranged on the side wall of the turntable;

[0009] The grinding assembly includes a hollow roller rotatably connected to the side wall of the turntable and a fixed shaft coaxially arranged with the hollow roller and fixed to the side wall of the turntable. A cam is fixed on the outer wall of the fixed shaft, and multiple groups of knocking and vibrating assemblies are arranged inside the hollow roller;

[0010] The knocking and vibrating assembly includes a housing welded to the inner wall of the hollow roller and an impact member slidably connected to the inner wall of the housing. A limiting rod is fixed inside the impact member, and the limiting rod is movably and limit-fitted with the outer surface of the cam.

[0011] As a further scheme of the utility model: the convex position of the cam is located below.

[0012] As a further solution of the present utility model: The impact member includes a first striking plate and a second striking plate that are slidably connected to the inner wall of the outer shell. The first striking plate and the second striking plate are slidably engaged through a guide rod, and a spring is sleeved on the outer wall of the guide rod. The limiting rod is welded to the outer wall of the second striking plate.

[0013] As a further solution of the present utility model: A bracket is fixed to the bottom outer wall of the storage shell through bolts. A motor is fixed to the side wall of the bracket through bolts. A gear is key-connected to the outer wall of the output shaft of the motor. A gear ring is engaged with the side wall of the gear. The gear ring is rotatably connected above the bracket and is in transmission cooperation with the outer wall of the turntable.

[0014] As a further solution of the present utility model: Uniform sieve holes are provided in the inner wall of the bottom periphery of the storage shell.

[0015] As a further solution of the present utility model: The bottom of the sieve hole is in an inverted conical shape.

[0016] As a further solution of the present utility model: The turntable and the gear ring are only slidably connected axially.

[0017] As a further solution of the present utility model: A plug rod is fixed to the top outer wall of the bracket. A corrugated groove is provided in the inner wall of the turntable. A limiting protrusion that is in movable limit cooperation with the corrugated groove is welded to the outer wall of the plug rod.

[0018] Compared with the prior art, the present utility model provides a powder grinding device, which has the following beneficial effects:

[0019] 1. In the present utility model, by providing a cam, a limiting rod and an impact member, while the hollow roller can be statically pressed and ground, the hollow roller can also be vibrated by impacting the outer shell, and the vibration direction is downward, so that the grinding and crushing effect on relatively hard materials can be increased.

[0020] 2. In the present utility model, by setting the impact member as a combination of a first striking plate and a second striking plate, when the limiting rod moves outward, it can achieve double impacts of the first striking plate on the outer shell and the second striking plate on the first striking plate, thereby increasing the vibration frequency and further increasing the grinding and crushing effect.

[0021] 3. In the present utility model, by providing a limiting protrusion and a corrugated groove, on the one hand, a relatively large gap can be intermittently generated between the hollow roller and the storage shell, so that the agglomerated raw materials can enter and be crushed, increasing the grinding reliability. On the other hand, the rotation drive, the vibration drive and the longitudinal displacement drive all rely on a single power source to achieve power integration.

[0022] The parts not involved in this device are the same as the prior art or can be implemented by using the prior art. The structure of the present utility model is simple and the operation is convenient. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of a powder grinding device proposed by the present utility model;

[0024] Figure 2 It is a schematic cross-sectional structure diagram of a grinding roller member of a powder grinding device proposed by the present utility model;

[0025] Figure 3 It is a schematic cross-sectional structure diagram of a knocking and vibrating assembly of a powder grinding device proposed by the present utility model;

[0026] Figure 4 It is a schematic structure diagram of a driving function part of a powder grinding device proposed by the present utility model;

[0027] Figure 5 It is a schematic diagram of a limiting projection and a corrugated groove of a powder grinding device proposed by the present utility model.

[0028] In the figure: 1 - storage shell, 2 - grinding roller member, 3 - turntable, 4 - hollow roller, 5 - knocking and vibrating assembly, 6 - fixed shaft, 7 - cam, 8 - outer shell, 9 - first knocking plate, 10 - guide rod, 11 - spring, 12 - second knocking plate, 13 - limiting rod, 14 - sieve hole, 15 - gear, 16 - motor, 17 - gear ring, 18 - bracket, 19 - insertion rod, 20 - limiting projection, 21 - corrugated groove. Detailed Description of the Preferred Embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing 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 thus should not be construed as a limitation of the present utility model.

[0031] Embodiment 1

[0032] A powder grinding device, in order to solve the problem of grinding efficiency, as Figures 1-5 shown, includes a storage shell 1, and a turntable 3 is movably arranged inside the storage shell 1, and a grinding assembly 2 is arranged on the side wall of the turntable 3.

[0033] The grinding assembly 2 includes a hollow roller 4 rotatably connected to the side wall of the turntable 3 and a fixed shaft 6 arranged coaxially with the hollow roller 4 and fixed to the side wall of the turntable 3. A cam 7 is fixed to the outer wall of the fixed shaft 6, and a plurality of sets of knocking and vibrating assemblies 5 are arranged inside the hollow roller 4.

[0034] The knocking and vibrating assembly 5 includes a housing 8 welded to the inner wall of the hollow roller 4 and an impact member slidably connected to the inner wall of the housing 8. A limiting rod 13 is fixed to the inner side of the impact member, and the limiting rod 13 is movably and limit-fitted to the outer surface of the cam 7.

[0035] The convex position of the cam 7 is located below.

[0036] When the device is in use, the material to be ground can be placed in the storage shell 1. When the turntable 3 rotates, the hollow roller 4 will rotate due to the friction with the inner wall of the storage shell 1 to achieve static pressure grinding. At the same time, since the fixed shaft 6 is stationary, when the hollow roller 4 rotates relative to the fixed shaft 6, it will drive the housing 8 and the limiting rod 13 to rotate relative to the fixed shaft 6. Until the housing 8 rotates to the bottom, the limiting rod 13 is limited by the cam 7 to move, so that the impact member impacts the inner wall of the housing 8, applying a downward vibration to the housing 8.

[0037] In this device, by setting the cam 7, the limiting rod 13 and the impact member, while the hollow roller 4 is performing static pressure grinding, it can also apply vibration to the hollow roller 4 by impacting the housing 8, and the vibration direction is downward, so as to increase the grinding and crushing effect on relatively hard materials.

[0038] To further increase the grinding effect, as Figure 3 shown, the impact member includes a knocking plate one 9 and a knocking plate two 12 slidably connected to the inner wall of the housing 8. The knocking plate one 9 and the knocking plate two 12 are slidably matched through a guide rod 10, and a spring 11 is sleeved on the outer wall of the guide rod 10. The limiting rod 13 is welded to the outer wall of the knocking plate two 12.

[0039] When the limiting rod 13 moves outward, first the knocking plate one 9 will impact the inner wall of the housing 8, generating a vibration. As the limiting rod 13 continues to move outward, the spring 11 will be compressed, so that the knocking plate two 12 and the knocking plate one 9 will come into contact again, realizing an impact.

[0040] In this device, by setting the impact member as a combination of the knocking plate one 9 and the knocking plate two 12, when the limiting rod 13 moves outward, it can achieve double impacts of the knocking plate one 9 and the housing 8, and the knocking plate two 12 and the knocking plate one 9, thereby increasing the vibration frequency and further increasing the grinding and crushing effect.

[0041] For the driving problem, as Figure 4As shown, a bracket 18 is fixed to the outer wall of the bottom of the storage shell 1 by bolts. A motor 16 is fixed to the side wall of the bracket 18 by bolts. A gear 15 is connected to the outer wall of the output shaft of the motor 16 by a key. A gear ring 17 is engaged with the side wall of the gear 15. The gear ring 17 is rotatably connected above the bracket 18 and is in transmission cooperation with the outer wall of the turntable 3.

[0042] When the motor 16 is started, it can drive the gear 15 to rotate, thereby driving the turntable 3 to rotate through the gear ring 17.

[0043] For discharging materials, as Figure 4 shown, uniformly distributed sieve holes 14 are formed in the inner wall of the bottom periphery of the storage shell 1, and the bottom of the sieve holes 14 is in an inverted conical shape. The ground materials can be screened through the sieve holes 14, so as to realize cyclic grinding.

[0044] In this embodiment, the materials to be ground can be placed in the storage shell 1. When the motor 16 is started, it can drive the gear 15 to rotate, thereby driving the turntable 3 to rotate through the gear ring 17. When the turntable 3 rotates, the hollow roller 4 will rotate due to the friction with the inner wall of the storage shell 1 to realize static pressure grinding. At the same time, since the fixed shaft 6 is stationary, when the hollow roller 4 rotates relative to the fixed shaft 6, it will drive the outer shell 8 and the limiting rod 13 to rotate relative to the fixed shaft 6. Until the outer shell 8 rotates to the bottom, the limiting rod 13 is limited to move by the cam 7, so that the impact member impacts the inner wall of the outer shell 8, applying a downward vibration to the outer shell 8. And when the limiting rod 13 moves outward, first, the knocking plate 1 impacts the inner wall of the outer shell 8 to generate a vibration. As the limiting rod 13 continues to move outward, the spring 11 will be compressed, so that the knocking plate 2 and the knocking plate 1 will contact again to realize an impact. The ground materials can be screened through the sieve holes 14, so as to realize cyclic grinding.

[0045] Embodiment 2:

[0046] A powder grinding device, in order to solve the problem of raw material caking, as Figures 1-5 shown, the following improvements are made on the basis of Embodiment 1 in this embodiment: The turntable 3 and the gear ring 17 are only axially slidably connected, that is, a keyway can be opened on the outer side of the turntable 3, and a protrusion that is in clearance fit with the keyway can be provided on the inner side of the gear ring 17.

[0047] A plug rod 19 is fixed to the outer wall of the top of the bracket 18. A corrugated groove 21 is formed in the inner wall of the turntable 3. A limiting protrusion 20 that is in movable limiting cooperation with the corrugated groove 21 is welded to the outer wall of the plug rod 19.

[0048] In this embodiment, when the turntable 3 rotates, the waveform groove 21 also rotates relative to the limit projection 20. Thus, by the mutual limitation between the waveform groove 21 and the limit projection 20, the axial up-and-down movement of the turntable 3 during rotation is achieved, so that a relatively large gap can be intermittently generated between the hollow roller 4 and the storage shell 1, allowing the agglomerated raw materials to enter and be crushed after being pressed.

[0049] In this device, by providing the limit projection 20 and the waveform groove 21, on the one hand, a relatively large gap can be intermittently generated between the hollow roller 4 and the storage shell 1, allowing the agglomerated raw materials to enter and be crushed after being pressed, thereby increasing the reliability of grinding. On the other hand, the rotational drive, the vibration drive, and the longitudinal displacement drive all rely on a single power source to achieve power integration.

[0050] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A powder grinding device, comprising a storage shell (1), characterized in that: A turntable (3) is movably arranged inside the storage shell (1), and a grinding assembly (2) is arranged on the side wall of the turntable (3); The grinding assembly (2) comprises a hollow roller (4) rotatably connected to the side wall of the turntable (3) and a fixed shaft (6) coaxially arranged with the hollow roller (4) and fixed to the side wall of the turntable (3), a cam (7) being fixed to the outer wall of the fixed shaft (6), and a plurality of knocking and vibration assemblies (5) being arranged on the inner side of the hollow roller (4); The knocking vibration assembly (5) comprises an outer shell (8) welded to the inner wall of the hollow roller (4) and an impact member slidably connected to the inner wall of the outer shell (8), a limiting rod (13) is fixed on the inner side of the impact member, and the limiting rod (13) is movably limited and matched with the outer surface of the cam (7).

2. A powder grinding device according to claim 1, characterized in that: The protruding position of the cam (7) is located at the bottom.

3. A powder grinding device according to claim 1, characterized in that: The impact member comprises a first knocking plate (9) and a second knocking plate (12) which are slidably connected to the inner wall of the outer shell (8); the first knocking plate (9) and the second knocking plate (12) are slidably matched via a guide rod (10); a spring (11) is sleeved on the outer wall of the guide rod (10); and the limit rod (13) is welded to the outer wall of the second knocking plate (12).

4. A powder grinding device according to claim 1, characterized in that: The bottom outer wall of the storage shell (1) is fixed with a bracket (18) by bolts, the side wall of the bracket (18) is fixed with a motor (16) by bolts, the outer wall of the output shaft of the motor (16) is connected with a gear (15) by a key, the side wall of the gear (15) is meshed with a gear ring (17), the gear ring (17) is rotatably connected to the top of the bracket (18) and the gear ring (17) is transmission-matched with the outer wall of the turntable (3).

5. A powder grinding device according to claim 1, characterized in that: The inner wall of the outer bottom of the storage shell (1) is provided with uniform sieve holes (14).

6. A powder grinding device according to claim 5, characterized in that: The bottom of the sieve hole (14) is in an inverted cone shape.

7. A powder grinding device according to claim 4, characterized in that: The turntable (3) and the gear ring (17) can only be connected in an axial sliding manner.

8. A powder grinding device according to claim 7, characterized in that: An insertion rod (19) is fixed to the top outer wall of the bracket (18), a corrugated groove (21) is provided on the inner wall of the turntable (3), and a limiting protrusion (20) which is movably limited and matched with the corrugated groove (21) is welded to the outer wall of the insertion rod (19).

Images