Milling device for hopper mechanism capable of crushing into blocks

Abstract

The invention discloses a milling device for a hopper mechanism capable of crushing into blocks, which belongs to the technical field of dredging devices for enamel glaze production hoppers, and comprises a tool bit assembly with a top cutting edge facing upwards and a power shaft which is vertically arranged and can rotate and lift, the tool bit assembly is installed at the top end of the power shaft and can rotate, ascend and descend along with the power shaft, the milling face can be expanded and shrunk in the radial direction, and during application, the tool bit assembly mills and pushes blocky powder from the lower end opening of a pipe hole of the discharging pipe upwards from the bottom, so that the blocky powder from the discharging pipe to the hopper falls automatically after being milled and crushed. The milling machine has the advantages that the tool bit assembly can expand the milling face in the radial direction, and in the process that blocky powder is milled and pushed upwards from the lower end opening of the pipe hole of the discharging pipe from the bottom, the milling machine can automatically adapt to the change of the hole diameter from the discharging pipe to the hopper from small to large only by adjusting the rotating speed of the power shaft.

Description

Technical Field

[0001] The present invention relates to a milling cutter for a hopper mechanism of pulverizable and agglomerated powder materials, and belongs to the technical field of dredging devices for hoppers used in the production of enamel glazes. Background Art

[0002] Enamel glaze materials are snowflake-shaped powder materials formed by highly mixing various raw materials in proportion and then subjecting them to high-temperature refinement treatment. They are widely used to form a hard and smooth surface protection layer on the product surface, which can not only make the product surface smooth and beautiful, but more importantly, can isolate the product from the environment and prevent the product surface from being corroded.

[0003] In the process of mixing the above-mentioned various raw materials in proportion, a generally adopted method is a trough-shaped conveyor belt leading to a mixing tank, with various hoppers arranged along the trough-shaped conveyor belt. The discharge ports of the hoppers are all aligned with the trough of the trough-shaped conveyor belt. During application, the raw materials contained in each hopper are discharged into the trough of the trough-shaped conveyor belt according to their respective flow control standards by the system.

[0004] The hoppers in an enamel glaze material factory are generally arranged with the hopper openings at the upper ends flush with the ground on the second floor of the workshop, facilitating personnel and machinery to pour raw materials into the hoppers on the second floor. The trough-shaped conveyor belt is arranged at a position close to the ground on the first floor. The discharge port of the hopper is located above the trough of the trough-shaped conveyor belt and close to the trough opening. A vertical feed pipe is arranged between the discharge port and the hopper.

[0005] The raw materials loaded into the hoppers are all in powder form. Among the various powder raw materials, some raw materials (such as sodium nitrate) have the characteristic of crystallizing and agglomerating when not flowing or agitated for a certain period of time. In the actual production process, it is impossible for such agglomerating raw materials loaded into the hoppers to be just used up before each shutdown due to process requirements (the conveyor belt stops supplying materials to the mixing tank). As long as the shutdown time is slightly longer, the raw materials remaining in the feed pipe and the hopper will agglomerate and lose their fluidity. Especially the raw materials in the part with greater lower pressure agglomerate harder. Workers can only knock on the feed pipe with a hammer to shatter the agglomerated raw materials and make them flow down, which is very time-consuming and laborious. After a long time and many times, some factories simply abandon this hopper and instead add materials manually according to quantity, which obviously does not meet the requirements of safe and efficient automated production.

[0006] To solve the above problems, the applicant designed a hopper mechanism for pulverizable and agglomerated powder materials, which involves a key milling device. Since the agglomerated powder materials do not only exist in the feed pipe, but also often exist in the hopper. The inner diameter of the hopper cavity is larger than the diameter of the pipe hole of the feed pipe (5), and general milling tools cannot automatically adapt to the change of the milling range in a long and narrow closed space. Summary of the Invention

[0007] The problem to be solved by the present invention is: how to smoothly pulverize the agglomerated powder in hoppers and feed pipes with different inner diameters.

[0008] In view of the above problems, the technical solution proposed by the present invention is: A milling cutter for a hopper mechanism capable of pulverizing agglomerated powder, comprising a cutter head assembly with the top cutting edge facing upwards and a power shaft vertically arranged that can rotate and lift. The cutter head assembly is installed at the top end of the power shaft and can rotate and lift with the power shaft, and it can radially expand and contract the milling surface. During application, the cutter head assembly mills and advances the agglomerated powder from the bottom upwards through the lower port of the pipe hole of the feed pipe, so that the agglomerated powder in the feed pipe to the hopper is milled and pulverized and then falls by itself.

[0009] The milling cutter further includes a power assembly for driving the rotation and lifting of the power shaft, and the power assembly establishes a driving relationship with the power shaft at the lower end of the power shaft.

[0010] The cutter head assembly includes a first cutter arm and a second cutter arm. There are at least two first cutter arms, which are installed on the outer peripheral surface of the top end of the power shaft at equal arc lengths. The number of the second cutter arms is equal to that of the first cutter arms, and they are respectively arranged on the lower sides of the respective first cutter arms and can slide along their respective first cutter arms. The ends of the first cutter arm and the second cutter arm close to the power shaft are the inner ends, and the ends far from the power shaft are the outer ends. The inner end of the first cutter arm is connected to the power shaft, so that the first cutter arm and the second cutter arm can rotate with the power shaft. A retraction tension spring is provided between the second cutter arm and the first cutter arm, and a centrifugal hammer is provided on the second cutter arm. When the rotation speed reaches a set value with the power shaft, the centrifugal force F1 formed by the centrifugal hammer can make the second cutter arm slide out towards the outer end of the first cutter arm against the tension of the retraction tension spring to expand the milling surface of the cutter head assembly. The upper sides of the first cutter arm and the second cutter arm are both provided with cutter teeth.

[0011] The cutter head assembly further includes a third cutter arm with cutter teeth on its upper side, and the third cutter arm is arranged at the top end of the power shaft.

[0012] Below the inner end of the first cutter arm, a slide bar seat is provided. On the front end face of the slide bar seat, there are two upper and lower slide bars extending parallel to the first cutter arm towards the outer end. The second cutter arm is provided with two parallel slide bar holes along the length direction, and a tension spring hole is provided between the two slide bar holes. The slide bar holes and the tension spring hole penetrate through the inner end section and the outer end face of the second cutter arm. The two slide bars are respectively sleeved in the two slide bar holes of the second cutter arm and can slide in the slide bar holes. The retraction tension spring is located in the tension spring hole, its inner end is fixedly connected to the slide bar seat, and its outer end is fixed to the outer end of the tension spring hole through a fixing pin.

[0013] The inner end of the first cutter arm is hinged to the power shaft through a hinge shaft, and the outer end of the first cutter arm can freely rotate up and down around the hinge shaft. The diameter of the circle drawn by the horizontal rotation of the outer end of the first cutter arm when the first cutter arm is in a horizontal state is larger than the aperture of the pipe hole of the feed pipe and smaller than the inner diameter of the cylindrical inner cavity of the hopper.

[0014] The first cutter arm is horizontally arranged. The inner end of the first cutter arm is fixedly connected to the power shaft. The first cutter arm is horizontally arranged. The inner end of the first cutter arm is fixedly connected to the power shaft. The outer end of the first cutter arm is close to the inner wall of the pipe hole of the blanking pipe.

[0015] The power assembly includes a guide block, a rotation driving unit for driving the power shaft to rotate, a lifting driving unit for driving the power shaft to lift, and a buffer compression spring. The power assembly has a guide groove for the vertical lifting of the milling cutter. The middle and lower part of the power shaft and the guide block are located in the guide groove. The rotation driving unit is fixed on the guide block. The lower end of the power shaft is in a rotation driving relationship with the rotation driving unit. The lifting driving unit is located below the guide block. The buffer compression spring is arranged between the lifting driving unit and the guide block. The lifting driving unit provides a lifting force through the buffer compression spring to lift the power shaft.

[0016] The rotation driving unit includes a first motor and a transmission box. One end of the transmission box is located in the guide groove and is fixedly connected to the upper surface of the guide block, and is connected to the lower end of the power shaft through internal gear meshing in the box. The other end of the transmission box is connected to the output shaft one of the first motor through internal gear meshing outside the guide groove.

[0017] The lifting driving unit includes a second motor, a lifting seat and a rack. There are two racks, which are respectively arranged on the front side wall and the rear side wall of the guide groove. The lifting seat is located in the guide groove below the guide block, and its front and rear sides respectively have lifting driving gears meshing with the rack. The second motor is arranged outside the guide groove and is in a driving relationship with the lifting driving gear in the lifting seat through the output shaft two. When the lifting driving gear rotates to drive the lifting seat to rise, the guide block is pushed to rise by the lifting seat. When the lifting driving gear rotates to drive the lifting seat to fall, all the milling cutter components above the guide block follow to fall under the action of gravity.

[0018] Advantageous effects: The cutter head assembly can radially expand the milling surface. During the process of milling and pushing the powdery materials in blocks from the bottom up through the lower port of the pipe hole of the blanking pipe, only by adjusting the rotation speed of the power shaft, it can automatically adapt to the change from the small to large aperture from the blanking pipe to the hopper, ensuring that the powdery materials adhering to the wall can also be milled after the upper milling surface becomes larger, enabling the entire hopper mechanism to break up the powdery materials in blocks without knocking the hopper equipment, so that the hopper can be used normally. Description of the Drawings

[0019] Figure 1 It is a cross-sectional schematic view of the milling cutter applied to the hopper mechanism in the first embodiment; Figure 2 It is a plan view of the milling cutter in the first embodiment; Figure 3 It is a schematic view of the cutter head assembly in the pipe hole of the blanking pipe in the first embodiment; Figure 4 Cross-sectional schematic diagram of the centrifugal hammer installed on the second tool arm as described in the first embodiment; Figure 5 Schematic diagram of the structure of the second tool arm and the sliding rod as described in the first embodiment; Figure 6 Stereoscopic schematic diagram of the assembly of the first tool arm, the second tool arm, the centrifugal hammer, etc. as described in the first embodiment; Figure 7 Schematic diagram of the working condition of the tool head assembly as described in the first embodiment. In the figure, it shows the tool head assembly rotating and milling the agglomerated powder (10) in the feed pipe. The arrow A in the figure represents the rotation direction of the power shaft, the arrow B represents the upward movement of the power shaft, and F1 represents the centrifugal force formed by the centrifugal hammer, etc.; Figure 8 Schematic diagram of the force condition of the first tool arm under the working condition when the tool head assembly enters the conical inner cavity as described in the first embodiment. The arrow A in the figure represents the rotation direction of the power shaft, the upward arrow B of the power shaft is not shown, the arrow F1 represents the centrifugal force formed by the centrifugal hammer, etc., F4 represents the tension formed by the hinge shaft on the first tool arm, F5 represents the resultant force formed by the centrifugal force F1 and the tension F4, F6 represents the vertical component of F5, F3 represents the gravity received by the centrifugal hammer, etc. In the figure, F6 is greater than F3, and the outer end of the first tool arm starts to rotate upward from the oblique downward direction, realizing the outward expansion of the first milling surface; Figure 9 For Figure 8 Schematic diagram of the force analysis. The greater F1 is, the greater F6 is; Figure 10 Schematic diagram when the tool head assembly enters the conical inner cavity as described in the first embodiment. In the figure, it shows that the centrifugal force F5 formed by the second tool arm and the centrifugal hammer is greater than the tension F2 of the retraction spring, and the second tool arm starts to slide outwards, realizing the expansion of the second milling surface; Figure 11 Stereoscopic schematic diagram of the support body as described in the first embodiment; Figure 12 Cross-sectional schematic diagram of the power assembly assembled at the lower part of the support body as described in the first embodiment; Figure 13 Cross-sectional schematic diagram of the guide post as described in the first embodiment; Figure 14 Cross-sectional schematic diagram of the assembly relationship between the lifting drive unit and the guide groove as described in the first embodiment; Figure 15 Cross-sectional schematic diagram of the assembly relationship between the rotation drive unit and the guide groove as described in the first embodiment; Figure 16 Schematic diagram when the tool head assembly retracts into the hole of the receiving cylinder after the hopper completes batching as described in the first embodiment. In the figure, it shows that the total material control switch is closed; Figure 17 Schematic diagram of the tool head assembly entering the conical inner cavity under the working condition as described in the second embodiment.

[0020] In the figure: 1. cutter head assembly; 11. first cutter arm; 12. second cutter arm; 121. slide bar hole; 122. tension spring hole; 123. fixing pin; 13. third cutter arm; 14. centrifugal hammer; 15. retraction tension spring; 16. slide bar seat; 17. slide bar; 18. hinge shaft; 19. cutter tooth; 2. power shaft; 3. power assembly; 31. rotation drive unit; 311. first motor; 3111. first output shaft; 312. transmission box; 32. lifting drive unit; 321. second motor; 3211. second output shaft; 322. lifting seat; 3221. lifting drive gear; 323. rack; 33. guide block; 34. buffer compression spring; 4. hopper; 41. cylindrical inner cavity; 42. conical inner cavity; 5. blanking pipe; 51. pipe hole; 6. total material control switch; 7. material guide; 71. receiving cylinder; 711. cylinder hole; 8. support body; 81. guide post; 811. guide groove; 9. trough conveyor belt; 10. caked powder. Specific embodiments

[0021] As Figure 1 shown, the present invention relates to a hopper 4 and a vertical blanking pipe 5 with a cylindrical pipe hole 51 communicating with the lower port of the hopper 4. The hopper 4 has an upper cylindrical inner cavity 41 and a lower conical inner cavity 42. A trough conveyor belt 9 is provided below the blanking pipe 5.

[0022] The present invention will be further described below in conjunction with embodiments and the drawings.

[0023] Embodiment 1.

[0024] As Figure 1 、 2 shown. A milling cutter for a hopper mechanism of caked powder that can be crushed into pieces includes a cutter head assembly 1 with a top cutting edge facing upwards and a vertically arranged power shaft 2 that can rotate and lift. The cutter head assembly 1 is installed at the top end of the power shaft 2 and can rotate and lift with the power shaft 2. It can radially expand and contract the milling surface. During application, the cutter head assembly 1 mills and advances the caked powder from the bottom upwards from the lower port of the pipe hole 51 of the blanking pipe 5, so that the caked powder in the blanking pipe 5 to the hopper 4 is milled and crushed and then falls by itself. Since the cutter head assembly 1 can radially expand the milling surface, during the upward milling and advancing process of the cutter head assembly 1, it can adapt to the change of the aperture from the blanking pipe 5 to the hopper 4 from small to large, ensuring that the caked powder adhering to the wall can also be milled after the upper milling surface becomes larger.

[0025] As Figure 2As shown in FIGS. 1-6, the cutter head assembly 1 includes a first cutter arm 11 and a second cutter arm 12. There are at least two first cutter arms 11, which are installed on the outer peripheral surface of the top end of the power shaft 2 at equal arc lengths. The number of the second cutter arms 33 is equal to that of the first cutter arms 11, and they are respectively arranged on the lower sides of the respective first cutter arms 11 and can slide along their respective first cutter arms 11. The ends of the first cutter arm 11 and the second cutter arm 12 close to the power shaft 2 are inner ends, and the ends far from the power shaft 2 are outer ends. The inner end of the first cutter arm 11 is connected to the power shaft 2, so that the first cutter arm 11 and the second cutter arm 12 can rotate with the power shaft 2. A retraction tension spring 15 is arranged between the second cutter arm 12 and the first cutter arm 11. A centrifugal weight 14 is arranged on the second cutter arm 12. When the set speed is reached during rotation with the power shaft 2, the centrifugal force F1 formed by the centrifugal weight 14 can enable the second cutter arm 12 to slide out towards the outer end of the first cutter arm 11 against the tension of the retraction tension spring 15, so as to expand the milling surface of the cutter head assembly. Cutter teeth 19 are arranged on the upper side surfaces of the first cutter arm 11 and the second cutter arm 12. During the application process, when the cutter head assembly 1 is located in the pipe hole 51 of the blanking pipe 5 with the smallest diameter, the power shaft 2 rotates at a relatively low speed, and the first cutter arm 11 mills the agglomerated powder in the pipe hole 51 of the blanking pipe 5. The second cutter arm 12 rotates with its respective first cutter arm 11. Due to the relatively low speed, the tension F2 of the retraction tension spring 15 overcomes the centrifugal force F1 formed by the centrifugal weight 14 on the second cutter arm 12, so that the second cutter arm 12 still remains below the first cutter arm 11 and is still in a contracted state. When the cutter head assembly 1 enters the conical inner cavity 42 with a gradually increasing diameter from the pipe hole 51 of the blanking pipe 5 with the smallest diameter, the power shaft 2 rotates at a relatively high speed, and the centrifugal force F1 formed by the centrifugal weight 14 on the second cutter arm 12 increases, which can overcome the tension F2 of the retraction tension spring 15 to make the second cutter arm 12 extend, and mill the agglomerated powder in the outer ring area outside the first cutter arm 11. When the milling is completed and the rotation of the first cutter arm 11 is reduced or stopped, when the centrifugal force F1 formed by the centrifugal weight 14 on the second cutter arm 12 is reduced or disappears, the second cutter arm 12 is pulled back by the retraction tension spring 15, completing the retraction of the second cutter arm, and the cutter head assembly can smoothly descend in the pipe hole 51 of the blanking pipe 5.

[0026] The setting of the cutter teeth 19 is convenient for feeding the agglomerated powder during milling. The radial settings of the cutter teeth 19 on the multiple first cutter arms 11 are arranged in a staggered manner, so that the cutter teeth 19 on the multiple first cutter arms 11 can be radially complementary, thereby forming a complete milling surface during milling.

[0027] The cutter head assembly 1 further includes a third cutter arm 13 with cutter teeth 19 on its upper side surface. The third cutter arm 13 is arranged at the top end of the power shaft 2 to make up for the milling blank formed at the top end of the power shaft 2 when the inner end of the first cutter arm 11 is not convenient to extend to the axis line of the power shaft 2.

[0028] Below the lower end of the first cutter arm 11, a slide bar seat 16 is provided. On the front end face of the slide bar seat 16, there are two upper and lower slide bars 17 parallel to the first cutter arm 11 and extending outward. The second cutter arm 12 is provided with two upper and lower parallel slide bar holes 121 along the length direction. Between the two slide bar holes 121, there is a tension spring hole 122. Both the slide bar holes 121 and the tension spring hole 122 penetrate through the inner end section and the outer end face of the second cutter arm 12. The two slide bars 17 are respectively sleeved in the two slide bar holes 121 of the second cutter arm 12 and can slide within the slide bar holes 121. The retraction tension spring 15 is located in the tension spring hole 122. Its inner end is fixedly connected to the slide bar seat 16, and its outer end is fixed to the outer end of the tension spring hole 122 through a fixing pin 123. In this way, the arrangements of the retraction tension spring 15 and the slide bars 17 are hidden within the second cutter arm 12 and will not occupy additional space outside the second cutter arm 12.

[0029] Preferably, only two first cutter arms 11 are provided.

[0030] As Figure 7 As shown in Fig. 10, in this embodiment, the inner end of the first cutter arm 11 is hingedly connected to the power shaft 2 through a hinge shaft 18. The outer end of the first cutter arm 11 can freely rotate up and down around the hinge shaft 18. The diameter of the circle drawn by the horizontal rotation of the outer end of the first cutter arm 11 when the first cutter arm 11 is in a horizontal state is greater than the aperture of the pipe hole 51 of the blanking pipe 5 and less than the inner diameter of the cylindrical inner cavity 41 of the hopper 4. In this way, when the cutter head assembly 1 is located within the pipe hole 51 of the blanking pipe 5 and the barrel hole 711 of the receiving cylinder 71, the outer ends of the first cutter arm 11 and the second cutter arm 12 belonging thereto are in a downward inclined posture. In this way, the lengths of the first cutter arm 11 and the second cutter arm 12 can be significantly extended. When milling ascends to the conical inner cavity 42 and the cylindrical inner cavity 41, the first cutter arm 11 and the second cutter arm 12 can obtain two outward extensions in the horizontal direction. The first is the outward extension from the obliquely downward posture to the horizontal posture of the first cutter arm 11, and the second is the outward extension of the horizontal extension of the second cutter arm 12.

[0031] It should be noted here that relying on the centrifugal force F1 can only make the first cutter arm 11 infinitely close to the horizontal posture, and actually it can never reach the true horizontal posture. The centrifugal force F1 is not solely provided by the centrifugal hammer 14 rotating with the power shaft 2, but also includes the centrifugal force generated by the outer end of the first cutter arm 11 itself and all components provided on the first cutter arm 11 rotating with the power shaft 2.

[0032] When the first cutter arm 11 rises obliquely downward and mills in the pipe hole 51 of the blanking pipe 5 in this embodiment, the centrifugal force F1 of the centrifugal hammer 14 causes the first cutter arm 11 to press the cutter teeth 19 tightly against the milling surface of the agglomerated powder 10, and this milling surface is a conical surface. When the first cutter arm 11 rises and mills in the conical inner cavity 42 and the cylindrical inner cavity 41, the resultant force F5 acting on the outer end side of the first cutter arm 11 is formed by the centrifugal force F1 of the centrifugal hammer 14 and the pulling force F4 of the hinged shaft 18 on the first cutter arm 11. Furthermore, the first cutter arm 11 obtains the vertically upward component force F6 of the resultant force F5, and the component force F6 overcomes the gravity F3 received by the outer end of the first cutter arm 11, making the first cutter arm 11 and its affiliated second cutter arm 12 approach a horizontal posture, and pressing the cutter teeth 19 tightly against the milling surface of the agglomerated powder 10, and this milling surface is a conical surface close to a plane.

[0033] Figure 9 is a simplified force analysis diagram of the upward movement of the outer end of the first cutter arm 11 when it rotates with the power shaft 2. In the figure: FI is the centrifugal force of the centrifugal hammer 14, the second cutter arm 12, and the outer end of the first cutter arm 11 when they rotate with the power shaft 2; F3 is the gravity received by the centrifugal hammer 14, the second cutter arm 12, and the outer end of the first cutter arm 11; F4 is the pulling force of the hinged shaft 18 received by the centrifugal hammer 14, the second cutter arm 12, and the outer end of the first cutter arm 11 through the first cutter arm 11; F5 is the resultant force formed by FI and F4; F6 is the vertical component force of F5. Before the first cutter arm reaches the horizontal posture, the larger FI is, the larger F6 is.

[0034] O is the mass point of the centrifugal hammer 14, the second cutter arm 12, and the outer end of the first cutter arm 11.

[0035] As Figure 11 shown in FIG. - 15, the milling cutter further includes a power assembly 3 for driving the rotation and lifting of the power shaft 2, and the power assembly 3 establishes a driving relationship with the power shaft 2 at the lower end of the power shaft 2. The power assembly 3 includes a guide block 33, a rotation driving unit 31 for driving the rotation of the power shaft 2, a lifting driving unit 32 for driving the lifting of the power shaft 2, and a buffer compression spring 34. The power assembly 3 has a guide groove 811 for the vertical lifting of the milling cutter. The middle and lower part of the power shaft 2 and the guide block 33 are located in the guide groove 811. The rotation driving unit 31 is fixed on the guide block 33, and the lower end of the power shaft 2 establishes a rotation driving relationship with the rotation driving unit 31. The lifting driving unit 32 is located below the guide block 33, and the buffer compression spring 34 is arranged between the lifting driving unit 32 and the guide block 33. The lifting driving unit 32 provides a lifting force through the buffer compression spring 34 to raise the power shaft 2.

[0036] Here, the guide groove 811 is opened on the guide post 81 of the support body 8, and the support body 8 is a device specifically for installing the milling cutter.

[0037] The setting of the buffer compression spring 34 ensures that the lifting force obtained by the cutter head assembly 1 during the milling rising process is continuous, and can also prevent the cutter head assembly from being forced upward when the lifting seat is started and damage the cutter head assembly 1, so that the force pushing the cutter head assembly 1 upward is a relatively flexible force.

[0038] The rotation driving unit 31 includes a motor 311 and a transmission box 312. One end of the transmission box 312 is located in the guide groove 811 and fixed to the upper surface of the guide block 33, and is connected to the lower end of the power shaft 2 through the engagement of the teeth inside the box. The other end of the transmission box 312 is connected to the output shaft 3111 of the motor 311 through the engagement of the teeth inside the box outside the guide groove 811.

[0039] The lifting drive unit 32 includes a second motor 321, a lifting seat 322 and a rack 323. There are two racks 323, which are respectively arranged on the front side wall and the rear side wall of the guide groove 811. The lifting seat 322 is located in the guide groove 811 below the guide block 33, and its front and rear sides are respectively provided with lifting drive gears 3221 meshing with the rack 323. The second motor 321 is arranged outside the guide groove 811, and establishes a driving relationship with the lifting drive gear 3221 in the lifting seat 322 through the output shaft 3211. When the lifting drive gear 3221 rotates to drive the lifting seat 322 to rise, the lifting seat 322 pushes the guide block 33 to rise. When the lifting drive gear 3221 rotates to drive the lifting seat 322 to descend, all milling machine components above the guide block 33 follow and descend under the action of gravity. This prevents the knife arm 2 12 in the cutter head assembly 1 from not fully retracting, and the knife arm 1 11 and the knife arm 2 12 are stuck in the position above the conical inner cavity 42 and are forcibly pulled downward by the descending lifting seat 322, causing damage.

[0040] The above-mentioned internal gear meshing is a conventional technical means, which means that transmission gears are provided in the transmission box 312 and the lifting seat 322, and internal spline teeth or external spline teeth or gears are provided at the outer ends of the output shaft 1 3111, the output shaft 2 3211 and the lower end of the power shaft 2. The specific setting method is determined according to needs. Since it is a conventional technical means, it is not described or illustrated in detail in this article.

[0041] like Figure 16 As shown, it should be noted that a material guide 7 is provided between the support body 8 and the feeding tube 5, and the material guide 7 has a material receiving barrel 71 connected to the feeding tube 5. A material control master switch 6 is provided between the feeding tube 5 and the material receiving barrel 71. The cutter head assembly 1 that has completed milling falls downward into the material receiving barrel 71. After the cutter head assembly 1 falls back into the material receiving barrel 71, the material control master switch 6 continues to be opened, so that the unagglomerated powder 10 newly poured into the hopper 4 can flow toward the trough conveyor belt 9, and the cutter head assembly 1 does not form a blockage; when the material control master switch 6 is closed, the batching is stopped, and the cutter head assembly is temporarily sealed in the material receiving barrel 71 for standby use.

[0042] Example 2

[0043] As Figure 17 shown, the difference from Example 1 is that the first cutter arm 11 is horizontally arranged, the inner end of the first cutter arm 11 is fixedly connected to the power shaft 2, and the outer end of the first cutter arm 11 is close to the inner wall of the pipe hole 51 of the blanking pipe 5, ensuring that when the first cutter arm 11 rotates, it can both mill the powder adhered to the wall in blocks and ensure that the outer end of the first cutter arm 11 does not contact and rub against the inner wall of the pipe hole 51 of the blanking pipe 5.

[0044] Since the aperture of the pipe hole 51 of the blanking pipe 5 is small, the length of the first cutter arm 11 designed in this way is limited, which determines that the length of the second cutter arm 12 is also limited. Therefore, this embodiment is applicable to the case where the ratio of the aperture of the pipe hole 51 of the blanking pipe 5 to the diameter of the cylindrical inner cavity 41 of the hopper 4 is relatively large.

[0045] The above embodiments are only used to describe the present invention more clearly and should not be regarded as limiting the protection scope covered by the present invention. Any modification in an equivalent form should be regarded as falling within the protection scope covered by the present invention.

Claims

1. A milling cutter for a hopper mechanism of pulverizable block powder materials, characterized in that: It includes a cutter head assembly (1) with the top cutting edge facing upward and a power shaft (2) vertically arranged and capable of rotating and lifting. The cutter head assembly (1) is installed at the top end of the power shaft (2) and can rotate and lift with the power shaft (2). It can radially expand and contract the milling surface. During application, the cutter head assembly (1) mills and advances the bulk powder from the bottom upward through the lower port of the pipe hole (51) of the blanking pipe (5), so that the bulk powder in the blanking pipe (5) to the hopper (4) is milled and fragmented and then falls by itself.

2. The milling cutter for the hopper mechanism of pulverizable bulk powder according to claim 1, characterized in that: The milling cutter further includes a power assembly (3) for driving the power shaft (2) to rotate and lift. The power assembly (3) establishes a driving relationship with the power shaft (2) at the lower end of the power shaft (2).

3. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 1, characterized in that: The cutter head assembly (1) includes a first cutter arm (11) and a second cutter arm (12). There are at least two first cutter arms (11), which are installed on the outer peripheral surface of the top end of the power shaft (2) at equal arc lengths. The number of the second cutter arms 33 is equal to that of the first cutter arms (11), and they are respectively arranged on the lower sides of the respective first cutter arms (11) and can slide along their respective first cutter arms (11). The ends of the first cutter arm (11) and the second cutter arm (12) close to the power shaft (2) are inner ends, and the ends far from the power shaft (2) are outer ends. The inner end of the first cutter arm (11) is connected to the power shaft (2), so that the first cutter arm (11) and the second cutter arm (12) can rotate with the power shaft (2). A retraction tension spring (15) is provided between the second cutter arm (12) and the first cutter arm (11). A centrifugal hammer (14) is provided on the second cutter arm (12). When the rotation speed reaches the set speed with the power shaft (2), the centrifugal force F1 formed by the centrifugal hammer (14) can make the second cutter arm (12) slide out towards the outer end of the first cutter arm (11) against the tension of the retraction tension spring (15) to expand the milling surface of the cutter head assembly. The upper sides of the first cutter arm (11) and the second cutter arm (12) are both provided with cutter teeth (19).

4. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 3, characterized in that: The cutter head assembly (1) further includes a third cutter arm (13) with cutter teeth (19) provided on its upper side. The third cutter arm (13) is arranged at the top end of the power shaft (2).

5. The milling cutter for the hopper mechanism of pulverizable block powder according to any one of claims 3 or 4, characterized in that: A slide bar seat (16) is provided below the inner end of the first cutter arm (11). On the front end face of the slide bar seat (16), there are two upper and lower slide bars (17) extending parallel to the first cutter arm (11) towards the outer end. The second cutter arm (12) is provided with two upper and lower parallel slide bar holes (121) along the length direction. A tension spring hole (122) is provided between the two slide bar holes (121). The slide bar holes (121) and the tension spring hole (122) both penetrate the inner end section and the outer end face of the second cutter arm (12). The two slide bars (17) are respectively sleeved in the two slide bar holes (121) of the second cutter arm (12) and can slide in the slide bar holes (121). The retraction tension spring (15) is located in the tension spring hole (122), its inner end is fixedly connected to the slide bar seat (16), and its outer end is fixed to the outer end of the tension spring hole (122) through a fixing pin (123).

6. The milling cutter for the hopper mechanism of pulverizable powdery materials according to claim 4, characterized in that: The inner end of the first cutter arm (11) is hinged to the power shaft (2) through a hinge shaft (18). The outer end of the first cutter arm (11) can freely rotate up and down around the hinge shaft (18). The diameter of the circle drawn by the horizontal rotation of the outer end of the first cutter arm (11) when the first cutter arm (11) is in a horizontal state is greater than the aperture of the pipe hole (51) of the blanking pipe (5) and less than the inner diameter of the cylindrical inner cavity (41) of the hopper (4).

7. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 4, characterized in that: The first cutter arm (11) is horizontally arranged. The inner end of the first cutter arm (11) is fixedly connected to the power shaft (2). The outer end of the first cutter arm (11) is close to the inner wall of the pipe hole (51) of the blanking pipe (5).

8. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 2, characterized in that: The power assembly (3) includes a guide block (33), a rotation drive unit (31) for driving the power shaft (2) to rotate, a lifting drive unit (32) for driving the power shaft (2) to lift, and a buffer compression spring (34). The power assembly (3) has a guide groove (811) for the vertical lifting of the milling cutter. The middle and lower part of the power shaft (2) and the guide block (33) are located in the guide groove (811). The rotation drive unit (31) is fixed on the guide block (33). The lower end of the power shaft (2) has a rotation drive relationship with the rotation drive unit (31). The lifting drive unit (32) is located below the guide block (33). The buffer compression spring (34) is arranged between the lifting drive unit (32) and the guide block (33). The lifting drive unit (32) provides a lifting force through the buffer compression spring (34) to lift the power shaft (2).

9. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 8, characterized in that: The rotation drive unit (31) includes a first motor (311) and a transmission box (312). One end of the transmission box (312) is located in the guide groove (811) and is fixedly connected to the upper surface of the guide block (33), and is connected to the lower end of the power shaft (2) through internal gear meshing in the box. The other end of the transmission box (312) is outside the guide groove (811) and is connected to the output shaft one (3111) of the first motor (311) through internal gear meshing in the box.

10. The milling cutter for the hopper mechanism of pulverizable block powder according to claim 8, characterized in that: The lifting drive unit (32) includes a second motor (321), a lifting seat (322), and a rack (323). There are two racks (323), which are respectively arranged on the front side wall and the rear side wall of the guide groove (811). The lifting seat (322) is located in the guide groove (811) below the guide block (33). The front and rear sides of the lifting seat (322) respectively have lifting drive gears (3221) meshing with the rack (323). The second motor (321) is arranged outside the guide groove (811) and has a drive relationship with the lifting drive gear (3221) in the lifting seat (322) through the output shaft two (3211). When the lifting drive gear (3221) rotates to drive the lifting seat (322) to rise, the lifting seat (322) pushes the guide block (33) to rise. When the lifting drive gear (3221) rotates to drive the lifting seat (322) to fall, all the milling cutter components above the guide block (33) follow and fall under the action of gravity.

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