Pulverizer of rice hulling and milling combined machine

Abstract

The invention belongs to the technical field of crushers, and particularly relates to a crusher of a rice hulling and grinding combined machine, which comprises a machine body and a cyclone dust collector, an exhaust fan shell; a first bearing seat; the fan rotating shaft is mounted in the bearing seat I, and one end of the fan rotating shaft penetrates through the bearing seat I, extends into the exhaust fan shell and is sleeved with an impeller shaft seat; the air exhaust hole is formed in the side, away from the first bearing seat, of the exhaust fan shell, and an air exhaust pipeline is connected between the air exhaust hole and the cyclone dust collector; and a gap is formed between the end part of the fan rotating shaft and the air exhaust hole, and a gap is formed between the end part of the impeller shaft seat and the air exhaust hole. The pulverizer has the beneficial effects that the fan rotating shaft and the impeller shaft seat are arranged at the interval between the air exhaust holes, so that air exhaust of the air exhaust holes is smoother, compared with a traditional technology, when the pulverizer operates, dust-containing air passing through an air exhaust pipeline is not hindered by the rotating shaft when passing through the air exhaust holes, impurities are not prone to being accumulated in the middle of an impeller, and blocking is not prone to occurring; and the air draft efficiency of the crusher is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of crushers, and particularly relates to a crusher for a combined rice hulling and milling machine. Background Art

[0002] The crusher of the combined rice hulling and milling machine is a very important part in the grain processing process. It can crush rice by-products (such as rice bran, rice husk, etc.) to meet certain fineness requirements for further processing and utilization.

[0003] Chinese Patent Publication No. CN107670751A discloses a crushing and integrating machine, which extracts rice husks and rice bran by the wind energy generated by a crushing fan. The dust-containing air enters the fan volute through the fan air inlet, and then is discharged through the air outlet of the fan volute. Since a part of the shaft and the bearing seat is located in the fan volute and on the air inlet path, the part between the fan impeller and the shaft is prone to sticking dust. As the equipment operates for a long time, the stuck dust in this part is prone to caking and its volume will become larger and larger, which easily causes blockage inside the fan volute, reduces the air extraction volume, and affects the grain processing efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a crusher for a combined rice hulling and milling machine to solve the above problems.

[0005] The technical solution of the present invention is realized as follows: A crusher for a combined rice hulling and milling machine, comprising: a machine body and a cyclone. The machine body includes: A crusher housing; An exhaust fan housing located on one side outside the crusher housing; A first bearing seat installed on the side of the exhaust fan housing facing away from the crusher housing; A fan rotating shaft installed in the first bearing seat, and one end of which penetrates the first bearing seat and extends into the exhaust fan housing to be sleeved with an impeller shaft seat; An air extraction hole is opened on the side of the exhaust fan housing facing away from the first bearing seat, and an air extraction pipeline is connected between the air extraction hole and the cyclone; Wherein, there are intervals between the end of the fan rotating shaft and the air extraction hole, and between the end of the impeller shaft seat and the air extraction hole.

[0006] Further, an impeller assembly is installed on the impeller shaft seat. The impeller assembly includes: A first impeller side plate installed at one end of the impeller shaft seat facing away from the air extraction hole; A second impeller side plate located on the side of the first impeller side plate facing away from the first bearing seat. A blade accommodation area is formed at an interval between the first impeller side plate and the second impeller side plate; Blades, several of which are provided and circumferentially distributed in the blade accommodation area. The left and right sides of the blades are respectively connected and fixed to the first impeller side plate and the second impeller side plate; A round hole is opened in the middle of the second impeller side plate; Among them, the round hole is coaxial with the air extraction hole, and the aperture of the round hole is larger than that of the air extraction hole.

[0007] Furthermore, the crusher housing includes: The second bearing housing is installed on the outer side of one side of the crusher housing; The crusher rotating shaft is arranged inside the second bearing housing. One end of the crusher rotating shaft extends into the crusher housing and is connected with a crushing rotor for crushing materials. The other end extends out of the outer side of the second bearing housing and is connected with a first pulley; Among them, a connecting plate is installed between the radial outer side of the second bearing housing and the air extractor housing to support the air extractor housing. One end of the fan rotating shaft extends out of the first bearing housing and is connected with a second pulley. The first pulley and the second pulley are connected by a belt drive.

[0008] Furthermore, a feed inlet is opened at one end of the crusher housing away from the air extractor housing. An outlet is opened on one side of the upper end of the crusher housing. An outlet pipe is connected between the outlet and the cyclone. An air inlet is opened on one side of the crusher housing away from the outlet. An air inlet pipe is connected between the air inlet and the air outlet of the air extractor housing.

[0009] Furthermore, a sealing housing is installed inside the connecting plate. An impurity removing mechanism is arranged inside the sealing housing. One end of the dust removing mechanism penetrates through the air extractor housing and extends into the air extractor housing to scrape the impurities covering the blades. The impurity removing mechanism includes: A fixing plate is fixedly installed on one side inside the sealing housing; A sliding plate is slidably installed on the upper end of the fixing plate; Among them, a scraping component for extending into the air extractor housing is arranged on one side of the sliding plate. A connecting hole for the scraping component to extend into is opened on the outer side of one side of the air extractor housing.

[0010] Furthermore, the scraping component includes: An upper scraping part; A lower scraping part. The upper scraping part and the lower scraping part are mirror-symmetrically distributed up and down and are arranged at intervals; The upper scraping part includes: A push plate is arranged horizontally. The front end of the push plate is bent downward to form an inclined surface; A transmission roller is rotatably installed on both sides of the lower end of the push plate. The length direction of the transmission roller is perpendicular to the length direction of the push plate; A transmission belt is sleeved on the outer sides of the two transmission rollers; A brush is arranged circumferentially on the outer periphery of the transmission belt; Among them, a vertical plate connected and fixed to the end of the fixing plate is installed at the end of the upper scraping part and the lower scraping part away from the air extractor housing.

[0011] Furthermore, the sliding plate further includes: Drive gear one; Drive gear two. Drive gear one and drive gear two are respectively rotatably installed on both sides of the upper end of the sliding plate, and drive gear one meshes with drive gear two; Drive wheel one. A receiving hole one is formed through the middle of drive gear one, and a drive wheel one rotatably connected to the sliding plate is arranged in the receiving hole one; Drive wheel two. A receiving hole two is formed through the middle of drive gear two, and a drive wheel two rotatably connected to the sliding plate is arranged in the receiving hole two; Wherein, a chute is formed through the upper end of the fixed plate. A drive motor is fixedly installed on one side of the lower end of the sliding plate. The output shaft of the drive motor penetrates through the sliding plate and is fixedly connected to drive wheel one to drive drive wheel one to rotate; Wherein, a drive wheel three is rotatably connected to the other side of the lower end of the sliding plate. A rotating bearing is key-connected between drive wheel three and drive wheel two, A transmission tooth one is arranged on half of the circumference of drive wheel three. Rack teeth matching with the transmission teeth are arranged on both side walls of the chute. When the transmission teeth mesh with the rack teeth on one side of the chute, the rack teeth on the other side are separated from the transmission teeth; Wherein, a pawl one is circumferentially arranged on the outer circumference of drive wheel one, and ratchet teeth one are circumferentially arranged on the hole wall of the receiving hole one. A pawl two is circumferentially arranged on the outer circumference of drive wheel two, and ratchet teeth two are circumferentially arranged on the hole wall of the receiving hole two. When drive wheel one rotates counterclockwise, drive gear one rotates synchronously and drives drive gear two to rotate clockwise, so that drive wheel two rotates synchronously clockwise to drive drive wheel three to rotate, so as to drive the sliding plate to horizontally extend / retract from the fixed plate.

[0012] Furthermore, drive wheel one further includes: A fixed ring, fixedly installed on the upper end of drive wheel one. Transmission tooth two is circumferentially arranged on the upper end of the fixed ring; Rotating ring one; Rotating ring two. Rotating ring one and rotating ring two are sequentially arranged at intervals from bottom to top above the fixed ring. Transmission tooth three and transmission tooth four are respectively circumferentially arranged at the upper and lower ends of rotating ring one. Transmission tooth five is circumferentially arranged at the lower end of rotating ring two; Drive gear three, located between the fixed ring and rotating ring one. The upper and lower sides of drive gear three are respectively meshed with transmission tooth three and transmission tooth two; Drive gear four, located between rotating ring one and rotating ring two. The upper and lower sides of drive gear four are respectively meshed with transmission tooth four and transmission tooth three; Wherein, a transmission shaft one is installed in the middle of drive gear three, and a transmission shaft two is installed in the middle of drive gear four. The ends of transmission shaft one and transmission shaft two penetrate through the vertical plate and are respectively fixedly connected to the transmission rollers of the lower scraping part and the upper scraping part to drive the transmission rollers to drive the transmission belt to move.

[0013] The beneficial effects of the present invention are as follows: The spacing between the fan rotating shaft and the impeller shaft seat and the air extraction holes enables smoother air extraction through the air extraction holes. Compared with the traditional technology, when the crusher is operating, the dust-containing air passing through the air extraction pipeline will not be obstructed by the rotating shaft when passing through the air extraction holes, preventing impurities from easily accumulating in the middle of the impeller and causing blockage, effectively improving the air extraction efficiency of the crusher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 Schematic diagram of the overall structure of the crusher in the specific embodiment of the present invention Figure 1 ; Figure 2 Partial cross-sectional view of the crusher in the specific embodiment of the present invention; Figure 3 Schematic diagram of the overall structure of the crusher in the specific embodiment of the present invention Figure 2 ; Figure 4 Schematic diagram of the structure of the scraping assembly in the specific embodiment of the present invention Figure 1 ; Figure 5 Schematic diagram of the structure of the scraping assembly in the specific embodiment of the present invention Figure 2 . DETAILED DESCRIPTION OF THE INVENTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0017] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0018] Embodiment 1: As Figures 1 to 5 shown, the present invention discloses a crusher of a rice hulling and milling combined rice machine, including: a machine body 1 and a cyclone 2. The machine body 1 includes: a crusher housing 3; an exhaust fan housing 4, located on one side outside the crusher housing 3; a first bearing seat 401, installed on the side of the exhaust fan housing 4 facing away from the crusher housing 3; a fan rotating shaft 402, installed in the first bearing seat 401, and one end thereof penetrates through the first bearing seat 401 and extends into the exhaust fan housing 4 and is sleeved with an impeller shaft seat 5; an air extraction hole 404, opened on the side of the exhaust fan housing 4 facing away from the first bearing seat 401. An air extraction pipe 405 is connected between the air extraction hole 404 and the cyclone 2; Wherein, there are clearances between the end of the fan rotating shaft 402 and the air extraction hole 404, and between the end of the impeller shaft seat 5 and the air extraction hole 404.

[0019] In the above technical solution, the first bearing seat is integrally connected and fixed to the exhaust fan housing; By adopting the above technical solution, the setting of the clearances between the fan rotating shaft and the impeller shaft seat and the air extraction hole makes the air extraction of the air extraction hole smoother. Compared with the traditional technology, when the crusher is running, the dust-containing air passing through the air extraction pipe will not be blocked by the rotating shaft when passing through the air extraction hole, so that impurities are not easily accumulated in the middle of the impeller and cause blockage, effectively improving the air extraction efficiency of the crusher.

[0020] Embodiment 2: This embodiment provides a crusher of a rice hulling and milling combined rice machine, which, in addition to including the technical solution of the above embodiment, further has the following technical features.

[0021] Furthermore, an impeller assembly is installed on the impeller shaft seat 5. The impeller assembly includes: The first impeller side plate 501 is installed at one end of the impeller shaft seat 5 away from the air extraction hole 404; The second impeller side plate 502 is located on the side of the first impeller side plate 501 away from the first bearing seat 401. A blade accommodation area is formed at an interval between the first impeller side plate 501 and the second impeller side plate 502; A number of blades 503 are provided and are circumferentially distributed in the blade accommodation area. The left and right sides of the blade 503 are respectively connected and fixed to the first impeller side plate 501 and the second impeller side plate 502; A round hole 504 is opened in the middle of the second impeller side plate 502; Among them, the round hole 504 is coaxial with the air extraction hole, and the aperture of the round hole 504 is larger than the aperture of the air extraction hole 404.

[0022] In the above technical solution, both ends of the blade are vertically connected and fixed to the first impeller side plate and the second impeller side plate respectively; By adopting the above technical solution, the setting of the round hole with an outer diameter larger than the air extraction hole makes the air flow more smooth.

[0023] Embodiment 3: This embodiment provides a crusher of a rice hulling and milling combined machine. In addition to including the technical solution of the above embodiment, it also has the following technical features.

[0024] Furthermore, the crusher housing 3 includes: The second bearing seat 301 is installed on the outer side of the crusher housing 3; The crusher rotating shaft 302 is arranged in the second bearing seat 301. One end of the rotating shaft of the crusher rotating shaft 302 extends into the crusher housing 3 and is connected with a crushing rotor for crushing materials, The other end extends out of the outer side of the second bearing seat 301 and is connected with a first pulley 303; Among them, a connecting plate is installed between the radial outer side of the second bearing seat 301 and the air extraction fan housing 4 for supporting the air extraction fan housing 3. One end of the fan rotating shaft 402 extends out of the first bearing seat 401 and is connected with a second pulley 4051. The first pulley 303 and the second pulley 4051 are connected by belt drive.

[0025] In the above technical solution, the crushing rotor is a crushing rotor provided with a number of blade structures, which can better crush materials; In the above technical solution, a sieve cylinder is also covered outside the crushing rotor; In the above technical solution, the first pulley is a multi-groove pulley and is connected with an external servo motor by belt drive, and then provides power for the fan rotating shaft through the first pulley; In the above technical solution, the connecting plate and the air extraction fan housing are integrally formed, and the connecting plate and the second bearing seat are fixed by bolt connection to facilitate the disassembly and assembly of the air extraction fan housing By adopting the above technical solution, the transmission structure is simple and easy to install.

[0026] Embodiment 4: This embodiment provides a crusher of a rice husking and milling combined machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0027] Furthermore, a feed port is provided at one end of the crushing shell 3 facing away from the exhaust fan shell, a discharge port is provided on one side of the upper end of the crushing shell 3, a discharge pipe is connected between the discharge port and the shaker, an air inlet is provided on the side of the crushing shell 3 away from the discharge port, and an air inlet pipe 505 is connected between the air inlet and the air outlet of the exhaust fan shell 3.

[0028] By adopting the above technical solution, the feed port is used to receive by-products such as rice bran and rice husk produced during the production of the rice hulling and milling combined machine, so that these by-products enter the screen drum and are crushed by the crushing rotor. The crushed materials are drawn into the shakron through the discharge pipe for collection. The setting of the air inlet pipe 505 facilitates the auxiliary air intake of the crushing machine shell to ensure that the discharge pipe can draw materials normally.

[0029] Embodiment 5: This embodiment provides a crusher of a rice husking and milling combined machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0030] Furthermore, a dust removal mechanism 6 is installed on the inner side of the connecting plate, one end of which penetrates through the exhaust fan housing 4 and extends into the exhaust fan housing 4 to scrape off impurities covered on the blades. The dust removal mechanism includes: The fixing plate 601 is fixedly installed on one side of the sealing housing; The sliding plate 602 is slidably mounted on the upper end of the fixed plate 601; A scraping assembly for extending into the exhaust fan housing 4 is provided on one side of the sliding plate 602, and a connecting hole for the scraping assembly to extend into is opened on the outer side of the exhaust fan housing 4.

[0031] In the above technical solution, a sealing shell is provided on the outer side of the impurity removal mechanism, one end of the sealing shell is mounted on the connecting plate, and the other end is mounted on the outer side of the exhaust fan housing, and the cover is arranged on the outer side of the connecting hole, so that the air outside the sealing shell will not enter the exhaust fan housing through the connecting hole; By adopting the above technical solution, the impurity removal mechanism can be extended into the exhaust fan casing after the grinder completes grain processing, and then cooperate with the servo motor to clean the blades one by one, thereby improving the exhaust efficiency, extending the life of the equipment, and ensuring smooth operation.

[0032] Embodiment 6: This embodiment provides a crusher of a rice husking and milling combined machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0033] Further, the scraping assembly includes: Upper scraping member; Lower scraping member. The upper scraping member and the lower scraping member are vertically mirror - distributed and are spaced apart from each other; The upper scraping member includes: Push plate 700, which is horizontally arranged. The front end of the push plate 700 is bent downward to form an inclined surface; Drive rollers, which are rotatably installed on both sides of the lower end of the push plate 700. The length direction of the drive rollers is perpendicular to the length direction of the push plate 700; Drive belt, which is sleeved outside the two drive rollers; Brush, which is circumferentially arranged on the outer periphery of the drive belt; Wherein, a vertical plate connected and fixed to the end of the fixed plate 601 is installed at one end of the upper scraping member and the lower scraping member away from the exhaust fan housing 4.

[0034] In the above - mentioned technical solution, since the upper scraping member and the lower scraping member are mirror - distributed and have the same structure, only the structure of the upper scraping member is described above; By adopting the above - mentioned technical solution, with the servo - motor rotating to align the blades with the scraping assembly, after the scraping assembly extends into the exhaust fan housing, the blades enter between the upper scraping member and the lower scraping member. The setting of the inclined surface forms a V - shape between the upper scraping member and the lower scraping member, which is convenient for the blades to enter and reduces the rotation error. Then, the drive belt is driven by the drive rollers, so that the brush brushes on both the upper and lower sides of the blades to clean the blade surface, without the need for manual disassembly and cleaning, and the use effect is good.

[0035] Embodiment 7: This embodiment provides a crusher for a rice hulling and milling combined rice machine. In addition to including the technical solutions of the above - mentioned embodiment, it also has the following technical features.

[0036] Further, the sliding plate 602 further includes: Drive gear one 800; Drive gear two 801. The drive gear one 800 and the drive gear two 801 are respectively rotatably installed on both sides of the upper end of the sliding plate 602, and the drive gear one 800 meshes with the drive gear two 801; Drive wheel one 802. A receiving hole one is vertically penetrated through the middle of the drive gear one 800, and a drive wheel one 802 rotatably connected to the sliding plate 602 is arranged in the receiving hole one; Drive wheel two 803. A receiving hole two is vertically penetrated through the middle of the drive gear two 801, and a drive wheel two 803 rotatably connected to the sliding plate 602 is arranged in the receiving hole two; Among them, a chute is provided through the upper end of the fixed plate 601. On one side of the lower end of the sliding plate 602, a driving motor 804 is fixedly installed. The output shaft of the driving motor 804 penetrates through the sliding plate 602 and is fixedly connected to the first driving wheel 802 to drive the first driving wheel 802 to rotate. Among them, on the other side of the lower end of the sliding plate 602, a third driving wheel 805 is rotatably connected. A rotating bearing is key-connected between the third driving wheel 805 and the second driving wheel 803. On half of the circumference of the third driving wheel 805, a first transmission tooth is provided. On the two side walls of the chute, racks that cooperate with the transmission teeth are provided. When the transmission teeth are engaged with the rack on one side of the chute, the rack on the other side is separated from the transmission teeth. Among them, a first ratchet is circumferentially provided on the outer circumference of the first driving wheel 802, a first ratchet tooth is circumferentially provided on the hole wall of the first receiving hole, a second ratchet is circumferentially provided on the outer circumference of the second driving wheel 803, and a second ratchet tooth is circumferentially provided on the hole wall of the second receiving hole. When the first driving wheel rotates counterclockwise, the first driving gear 800 rotates synchronously and drives the second driving gear 801 to rotate clockwise, so that the second driving wheel 803 rotates synchronously clockwise to drive the third driving wheel 805 to rotate, so as to drive the sliding plate to horizontally extend / retract from the fixed plate 601.

[0037] By adopting the above technical solution, when the motor drives the first driving wheel to rotate counterclockwise, the third driving wheel can be driven to rotate, so that the sliding plate can drive the scraping mechanism to reciprocally extend and retract into the blower housing, facilitating the cleaning of each blade one by one. When the motor is started and the sliding plate moves, the transmission roller can rotate synchronously to drive the scraping mechanism to horizontally move for preliminary cleaning of the blades. When the scraping mechanism completely extends and cooperates with the blades, the motor drives the first driving wheel to rotate clockwise. At this time, the third driving wheel is fixed and the sliding plate is stationary. The motor alone provides power to the transmission roller to further clean the blades. The structure is small and the sliding plate and the transmission roller do not interfere with each other when providing power.

[0038] Embodiment 8: This embodiment provides a crusher for a rice hulling and milling combined rice machine. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0039] Furthermore, the first driving wheel 802 further includes: A fixing ring 900, fixedly installed on the upper end of the first driving wheel 802. A second transmission tooth is circumferentially provided on the upper end of the fixing ring 900. A first rotating ring 901; A second rotating ring 902. The first rotating ring 901 and the second rotating ring 902 are sequentially arranged at intervals from bottom to top above the fixing ring 900. A third transmission tooth and a fourth transmission tooth are circumferentially provided at the upper and lower ends of the first rotating ring 901 respectively. A fifth transmission tooth is circumferentially provided at the lower end of the second rotating ring 902. The drive gear three 903 is located between the fixed ring 900 and the first rotating ring 901. The upper and lower sides of the drive gear three 903 are respectively engaged with the third transmission tooth and the second transmission tooth; The drive gear four 904 is located between the first rotating ring 901 and the second rotating ring 902. The upper and lower sides of the drive gear four 904 are respectively engaged with the fourth transmission tooth and the third transmission tooth; Among them, a first transmission shaft is installed in the middle of the drive gear three 903, and a second transmission shaft is installed in the middle of the drive gear four 904. The ends of the first transmission shaft and the second transmission shaft penetrate the vertical plate and are respectively connected and fixed to the transmission rollers of the lower scraping member and the upper scraping member, so as to drive the transmission rollers to drive the transmission belt to move; In the above technical solution, the first rotating ring and the second rotating ring are connected to the vertical plate through the support plate, and the first rotating ring and the second rotating ring can rotate on the support plate; By adopting the above technical solution, when the first drive wheel rotates, the fixed ring rotates synchronously. The drive gear three is driven to rotate through the second transmission tooth, and then the second rotating ring is driven to rotate through the rotation of the drive gear three, so as to drive the drive gear four to rotate synchronously. Then, power is output to the transmission rollers through the first transmission shaft and the second transmission shaft. The setting of the second rotating ring can play a certain auxiliary fixing role, making the overall power transmission structure more stable.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crusher for a combined rice hulling and milling machine, comprising: The machine body (1) and the cyclone (2), characterized in that the machine body (1) includes: A crusher housing (3); An exhaust fan housing (4), located on one side outside the crusher housing (3); A first bearing seat (401), installed on the side of the exhaust fan housing (4) facing away from the crusher housing (3); An exhaust fan rotating shaft (402), installed in the first bearing seat (401), and one end of which penetrates the first bearing seat (401) and extends into the exhaust fan housing (4) and is sleeved with an impeller shaft seat (5); An air extraction hole (404), opened on the side of the exhaust fan housing (4) facing away from the first bearing seat (401), and an air extraction pipe (405) is connected between the air extraction hole (404) and the cyclone (2); Wherein, there are spaces between the end of the exhaust fan rotating shaft (402) and the air extraction hole (404), and between the end of the impeller shaft seat (5) and the air extraction hole (404).

2. The grinder of a rice hulling and milling combined rice machine according to claim 1, characterized in that, An impeller assembly is installed on the impeller shaft seat (5), and the impeller assembly includes: A first impeller side plate (501), installed at one end of the impeller shaft seat (5) facing away from the air extraction hole (404); A second impeller side plate (502), located on the side of the first impeller side plate (501) facing away from the first bearing seat (401), and a blade accommodation area is formed at an interval between the first impeller side plate (501) and the second impeller side plate (502); Blades (503), several of which are provided and distributed circumferentially in the blade accommodation area, and the left and right sides of the blades (503) are respectively connected and fixed to the first impeller side plate (501) and the second impeller side plate (502); A round hole (504), opened in the middle of the second impeller side plate (502); Wherein, the round hole (504) is coaxial with the air extraction hole, and the aperture of the round hole (504) is larger than the aperture of the air extraction hole (404).

3. The grinder of a rice hulling and milling combined rice machine according to claim 1, characterized in that, The crusher housing (3) includes: A second bearing seat (301), installed on one side outside the crusher housing (3); A crusher rotating shaft (302), arranged in the second bearing seat (301), and one end of the rotating shaft of the crusher rotating shaft (302) extends into the crusher housing (3) and is connected with a crushing rotor for crushing materials, The other end extends out of the outside of the second bearing seat (301) and is connected with a first pulley (303); Wherein, a connecting plate is installed between the radial outside of the second bearing seat (301) and the exhaust fan housing (4) to support the exhaust fan housing (3), one end of the exhaust fan rotating shaft (402) extends out of the first bearing seat (401) and is connected with a second pulley (4051), and the first pulley (303) and the second pulley (4051) are connected by belt drive.

4. The grinder of a rice hulling and milling combined rice machine according to claim 1, characterized in that, An inlet is opened at one end of the crusher housing (3) facing away from the exhaust fan housing (4), an outlet is opened on one side of the upper end of the crusher housing (3), an outlet pipe is connected between the outlet and the cyclone, an air inlet is opened on one side of the crusher housing (3) away from the outlet, and an air inlet pipe (505) is connected between the air inlet and the air outlet of the exhaust fan housing (3).

5. The grinder of a rice hulling and milling combined rice machine according to claim 3, characterized in that, A sealing housing is installed inside the connecting plate, and an impurity removal mechanism (6) is arranged inside the sealing housing. One end of the dust removal mechanism penetrates the exhaust fan housing (4) and extends into the exhaust fan housing (4) to scrape off the impurities covering the blades. The impurity removal mechanism includes: A fixing plate (601), fixedly installed on one side inside the sealing housing; The sliding plate (602) is slidably mounted on the upper end of the fixed plate (601); Wherein, one side of the sliding plate (602) is provided with a scraping assembly for extending into the suction fan housing (4), and a connection hole for the scraping assembly to extend into is formed on the outer side of the suction fan housing (4).

6. The grinder of a rice hulling and milling combined rice machine according to claim 5, characterized in that, The scraping assembly includes: The upper scraping member; The lower scraping member, the upper scraping member and the lower scraping member are vertically mirror - distributed and arranged at intervals from each other; The upper scraping member includes: The pushing plate (700), which is horizontally arranged, and the front end of the pushing plate (700) is bent downward to form an inclined surface; The driving rollers, which are rotatably mounted on both sides of the lower end of the pushing plate (700), and the length direction of the driving rollers is perpendicular to the length direction of the pushing plate (700); The transmission belt, which is sleeved on the outer sides of the two driving rollers; The brush, which is circumferentially arranged on the outer circumference of the transmission belt; Wherein, one end of the upper scraping member and the lower scraping member away from the suction fan housing (4) is provided with a vertical plate connected and fixed to the end of the fixed plate (601).

7. The grinder of a rice hulling and milling combined rice machine according to claim 6, characterized in that, The sliding plate (602) further includes: The first driving gear (800); The second driving gear (801), the first driving gear (800) and the second driving gear (801) are respectively rotatably mounted on both sides of the upper end of the sliding plate (602), and the first driving gear (800) meshes with the second driving gear (801); The first driving wheel (802), a receiving hole one is formed through the middle of the first driving gear (800), and the first driving wheel (802) rotatably connected to the sliding plate (602) is arranged in the receiving hole one; The second driving wheel (803), a receiving hole two is formed through the middle of the second driving gear (801), and the second driving wheel (803) rotatably connected to the sliding plate (602) is arranged in the receiving hole two; Wherein, a chute is formed through the upper end of the fixed plate (601), and a driving motor (804) is fixedly installed on one side of the lower end of the sliding plate (602). The output shaft of the driving motor (804) passes through the sliding plate (602) and is connected and fixed to the first driving wheel (802) to drive the first driving wheel (802) to rotate; Wherein, the other side of the lower end of the sliding plate (602) is rotatably connected to a third driving wheel (805), and a rotating bearing is key - connected between the third driving wheel (805) and the second driving wheel (803), A first set of transmission teeth is arranged on half of the circumference of the third driving wheel (805), and racks matching the transmission teeth are arranged on the two side walls of the chute. When the transmission teeth mesh with the rack on one side of the chute, the rack on the other side is separated from the transmission teeth; Wherein, a first pawl is circumferentially arranged on the outer circumference of the first driving wheel (802), a first set of ratchet teeth is circumferentially arranged on the hole wall of the receiving hole one, a second pawl is circumferentially arranged on the outer circumference of the second driving wheel (803), and a second set of ratchet teeth is circumferentially arranged on the hole wall of the receiving hole two. When the first driving wheel rotates counter - clockwise, the first driving gear (800) rotates synchronously and drives the second driving gear (801) to rotate clockwise, so that the second driving wheel (803) rotates synchronously clockwise to drive the third driving wheel (805) to rotate, so as to drive the sliding plate to horizontally extend / retract from the fixed plate (601).

8. The grinder of a rice hulling and milling combined rice machine according to claim 7, characterized in that, The first driving wheel (802) further includes: The fixing ring (900), which is fixedly installed on the upper end of the first driving wheel (802), and a second set of transmission teeth is circumferentially arranged on the upper end of the fixing ring (900); Rotating ring 1 (901); Rotating ring 2 (902). A rotating ring 1 (901) and a rotating ring 2 (902) are sequentially arranged at intervals from bottom to top above the fixed ring (900). Transmission teeth 3 and transmission teeth 4 are circumferentially arranged at the upper and lower ends of the rotating ring 1 (901), and transmission teeth 5 are circumferentially arranged at the lower end of the rotating ring 2 (902); Drive gear 3 (903), located between the fixed ring (900) and the rotating ring 1 (901), and the upper and lower sides of the drive gear 3 (903) are respectively meshed with the transmission teeth 3 and the transmission teeth 2; Drive gear 4 (904), located between the rotating ring 1 (901) and the rotating ring 2 (902), and the upper and lower sides of the drive gear 4 (904) are respectively meshed with the transmission teeth 4 and the transmission teeth 3; Among them, a transmission shaft 1 is installed in the middle of the drive gear 3 (903), a transmission shaft 2 is installed in the middle of the drive gear 4 (904), and the ends of the transmission shaft 1 and the transmission shaft 2 penetrate through the vertical plate and are respectively connected and fixed to the transmission rollers of the lower scraping member and the upper scraping member, so as to drive the transmission rollers to drive the conveyor belt to move.

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