Mixer for prestressed concrete pipe pile production

Abstract

The invention relates to the technical field of concrete mixers, and discloses a mixer for prestressed concrete pipe pile production, which comprises a concrete mixer for mixing concrete raw materials, the concrete mixer comprises a mixing tank, a mixing shaft is arranged in the mixing tank, and mixing blades are mounted on the mixing shaft; the scraping mechanism comprises a side plate, and a scraping plate is arranged on the side, away from the fixing block, of the side plate; and the telescopic mechanism is arranged between the side plate and the scraping plate and is used for driving the scraping plate to do telescopic motion. According to the concrete mixing device disclosed by the invention, the scraping plate is controlled to do telescopic motion, so that the scraping plate can intermittently scrape materials adsorbed on the inner wall of the mixing tank, the abrasion of the inner wall of the mixing tank is reduced, and through the arrangement of a cutter and crushing blades, the scraped caked materials can be minced, the mixing uniformity of concrete raw materials is improved, and the mixing efficiency is improved. The mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete mixers, and more specifically, to a mixer for producing prestressed concrete pipe piles. Background Art

[0002] Prestressed concrete pipe piles are a type of building material commonly used in foundation engineering. They are tubular piles made of concrete and steel bars through prestressing technology, and are usually used to reinforce the foundations of structures such as buildings, bridges, and ports. They are mainly designed to withstand large vertical loads and reduce the risk of concrete cracking by tensioning steel bars before pouring concrete to increase the bearing capacity of the piles. They are also suitable for various foundation engineering projects.

[0003] At present, prestressed concrete pipe piles are prefabricated in factories. During the production process of prestressed concrete pipe piles, the mixer is a device used to mix materials such as cement, sand, aggregate and water to prepare uniform concrete, ensuring that cement, sand, gravel, water and other materials are fully mixed to achieve the concrete strength and performance required by the design, which can meet the production needs of different prestressed concrete pipe piles.

[0004] In the production process of prestressed concrete pipe piles, the mixer often encounters the problem of raw materials adhering to the inner wall of the mixing barrel when mixing concrete materials. Although the existing mixer is equipped with a scraper, which can remove the attached concrete raw materials to a certain extent, this scraping mechanism easily causes wear on the inner wall of the mixing barrel, and the continuous friction between the scraper and the inner wall will gradually weaken the structural integrity of the mixing barrel. In addition, in the process of removing the attached materials, the concrete materials will cause sticky deposition due to long-term retention, and the wear of the inner wall of the mixer will also cause the materials to be adsorbed and form lumps, which will lead to uneven mixing and affect the concrete mixing efficiency. Summary of the invention

[0005] The present invention provides a mixer for the production of prestressed concrete pipe piles, which solves the technical problem in the related art that a scraping mechanism easily causes wear on the inner wall of a mixing barrel, and in the process of removing attached materials, concrete materials will be deposited, and the wear on the inner wall of the mixer will also cause the materials to be adsorbed and form lumps, which will lead to uneven mixing and affect the mixing efficiency of concrete.

[0006] The present invention provides a mixer for prestressed concrete pipe pile production, comprising a concrete mixer for mixing concrete raw materials, the concrete mixer comprising a mixing tank, and a motor is also installed on the mixing tank, a mixing shaft is arranged in the mixing tank, and a mixing blade is installed on the mixing shaft; a scraping mechanism, the scraping mechanism comprising a side plate, a fixing block is installed on the side plate, a connecting rod is installed on the fixing block, and the connecting rod is fixedly connected to the mixing shaft, and a scraper is arranged on a side of the side plate away from the fixing block; a telescopic mechanism is arranged between the side plate and the scraper to drive the scraper to perform telescopic movement; when the scraper is in an extended state, the scraper comes into contact with the inner wall of the mixing tank to scrape off the attached raw materials on the inner wall of the mixing tank; when the scraper is in a retracted state, the scraper is released from contact with the inner wall of the mixing tank, so that there is a rotation gap between the scraper and the inner wall of the mixing tank, thereby reducing the wear of the inner wall of the mixing tank.

[0007] As a further optimization scheme of the present invention, the telescopic mechanism includes a guide column slidably connected to the fixed block, and one end of the guide column is fixedly connected to the scraper, the other end of the guide column is installed with a first inclined block, and the first inclined block is provided with a second inclined block, a connecting sleeve is installed on the second inclined block, and a connecting shaft is connected to the bearing in the connecting sleeve, the upper and lower ends of the connecting shaft both pass through the fixed block, the connecting shaft is slidably connected to the fixed block, and a first spring is also provided on the guide column.

[0008] As a further optimization scheme of the present invention, the bearing on the connecting shaft is connected to a sleeve block, and the bearing on the sleeve block is connected to a roller. A driving ring is installed in the mixing tank, and the driving ring is located on the moving track of the roller.

[0009] As a further optimization scheme of the present invention, the driving ring is provided with a smooth portion and a protruding portion, the smooth portion is arranged parallel to the horizontal plane of the driving ring, the protruding portion protrudes toward one end away from the driving ring, and the connection between the smooth portion and the protruding portion is arranged at an incline.

[0010] As a further optimization solution of the present invention, a limit ring is also installed on the connecting shaft, and the limit ring is located on the lower surface of the sleeve block, and is used to limit the movement of the sleeve block.

[0011] As a further optimization scheme of the present invention, a connecting plate is installed on one group of the fixed blocks, and a shaft sleeve is connected to the bearing on the connecting plate, a spline shaft is slidably connected in the shaft sleeve, the spline shaft is fixedly connected to the connecting shaft, and a second spring is installed between the shaft sleeve and the spline shaft.

[0012] As a further optimization solution of the present invention, a limiting groove is provided on the connection plate, and a limiting block is slidably connected in the limiting groove, and the limiting block is installed on the sleeve block.

[0013] As a further optimization scheme of the present invention, a crushing mechanism is provided on the side plate for crushing the attachments attached to the inner wall of the mixing tank. The crushing mechanism includes a top plate slidably connected to the fixed block, and a cutter is installed on the top plate. A third spring is installed between the side plate and the top plate.

[0014] As a further optimization scheme of the present invention, a cam is also installed on the connecting shaft, and the center of the circle between the cam and the connecting shaft is eccentrically set, a gear is installed on the sleeve, and a gear ring is also installed in the mixing tank, and the gear ring is meshingly connected with the gear.

[0015] As a further optimization scheme of the present invention, a first bevel tooth is installed on the connecting shaft, and a second bevel tooth is meshingly connected to the first bevel tooth, a rotating shaft is installed on the second bevel tooth, and the rotating shaft passes through the top plate and is connected to the side plate bearing, and a crushing blade is installed on the rotating shaft.

[0016] The beneficial effects of the present invention are as follows: the present invention controls the scraper to perform telescopic movement so that the scraper can intermittently scrape the material adsorbed on the inner wall of the mixing tank, thereby reducing the wear of the inner wall of the mixing tank, and through the setting of the cutting knife and the crushing blade, the agglomerated material after scraping can be crushed, thereby increasing the uniformity of the mixing of concrete raw materials and improving the mixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0020] Figure 4 It is a partial three-dimensional structural schematic diagram of the material turning mechanism, the telescopic mechanism and the fragmentation mechanism of the present invention;

[0021] Figure 5 The present invention Figure 4 A schematic diagram of a three-dimensional cross-sectional structure;

[0022] Figure 6 The present invention Figure 5 Schematic diagram of the local structure;

[0023] Figure 7 The present invention Figure 6 A magnified view of the structure at center;

[0024] Figure 8 It is a schematic diagram of the positional relationship between the concrete mixer and the gear ring of the present invention;

[0025] Fig. 9 The present invention Figure 8 A magnified view of the structure at B in the middle;

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the drive ring, the smooth portion and the protruding portion of the present invention.

[0027] In the figure: 100, concrete mixer; 101, mixing tank; 102, feed port; 103, discharge port; 104, motor; 105, mixing shaft; 106, mixing blade; 107, support frame; 200, scraper mechanism; 201, side plate; 202, fixed block; 203, connecting rod; 204, scraper; 300, telescopic mechanism; 301, guide column; 302, first tilting block; 303, second tilting block; 304, connecting sleeve; 305, connecting shaft; 306, first spring; 307, sleeve block; 308 , roller; 309, limit block; 310, limit groove; 311, drive ring; 312, smooth part; 313, protrusion; 314, limit ring; 315, connecting plate; 316, bushing; 317, spline shaft; 318, second spring; 400, fragmentation mechanism; 401, top plate; 402, cutter; 403, cam; 404, gear; 405, third spring; 406, first bevel gear; 407, second bevel gear; 408, rotating shaft; 409, crushing blade; 410, protective shell; 411, gear ring. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0029] According to the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a mixer for prestressed concrete pipe pile production includes a concrete mixer 100 for mixing concrete raw materials. The concrete mixer 100 includes a mixing tank 101, and the mixing tank 101 is equipped with a feed port 102 and a discharge port 103. The mixing tank 101 is also equipped with a motor 104. A mixing shaft 105 is provided in the mixing tank 101, and a mixing blade 106 is installed on the mixing shaft 105. The output shaft of the motor 104 is fixedly connected to the mixing shaft 105. The mixing tank 101 is also equipped with a support frame 107.

[0030] Among them, when manufacturing concrete pipe piles, it is necessary to use a concrete mixer 100 to mix the concrete raw materials, so as to facilitate the pouring of concrete into the pipe pile model for the production of prestressed concrete pipe piles; specifically, the concrete raw materials to be added are added to the mixing tank 101 in proportion and mixed by the driving motor 104; when the driving motor 104 rotates, the mixing shaft 105 drives the mixing blades 106 to rotate synchronously to mix the concrete raw materials in the mixing tank 101.

[0031] Specifically, according to the attached Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, a scraping mechanism 200 is provided on the mixing shaft 105, and the scraping mechanism 200 includes a side plate 201. Two groups of side plates 201 are provided and are located on both sides of the mixing shaft 105. Two groups of fixed blocks 202 are installed on the side plates 201. Connecting rods 203 are installed on both groups of fixed blocks 202, and the connecting rods 203 are fixedly connected to the mixing shaft 105. A scraper 204 is provided on the side of the side plate 201 away from the fixed block 202.

[0032] It should be understood that when the mixing shaft 105 is driven to rotate, the side plate 201 rotates, thereby driving the scraper 204 to rotate synchronously; and a telescopic mechanism 300 is provided between the side plate 201 and the scraper 204 to drive the scraper 204 to perform telescopic movement.

[0033] When the scraper 204 is in the unfolded state, the scraper 204 comes into contact with the inner wall of the mixing tank 101 , so that when the mixing shaft 105 drives the scraper 204 to rotate, the scraper 204 can scrape off the attached raw materials on the inner wall of the mixing tank 101 to avoid being adsorbed on the inner wall of the mixing tank 101 .

[0034] When the scraper 204 is in the retracted state, the scraper 204 is no longer in contact with the inner wall of the mixing tank 101, so that when the mixing shaft 105 drives the scraper 204 to rotate, there is a rotational gap between the scraper 204 and the inner wall of the mixing tank 101, thereby avoiding the scraper 204 from rubbing against the inner wall of the mixing tank 101 for a long time, thereby increasing the service life of the scraper 204 and reducing the wear of the inner wall of the mixing tank 101.

[0035] According to the attached Figure 6 and attached Figure 7 As shown, the telescopic mechanism 300 includes a guide column 301 slidably connected to the fixed block 202, and one end of the guide column 301 is fixedly connected to the scraper 204, and the other end of the guide column 301 is installed with a first tilting block 302, and the first tilting block 302 is provided with a second tilting block 303.

[0036] It should be understood that when the second tilting block 303 is driven to move, the second tilting block 303 squeezes the first tilting block 302, so that the first tilting block 302 moves, thereby driving the guide column 301 to move synchronously, so that the scraper 204 is unfolded, and the scraper 204 is attached to the inner wall of the mixing tank 101. It is also convenient to scrape off the attachments on the inner wall of the mixing tank 101 when the scraper 204 rotates, and clean the inner wall of the mixing tank 101.

[0037] Among them, a connecting sleeve 304 is installed on the second tilting block 303, and a connecting shaft 305 is connected to the bearing inside the connecting sleeve 304. The upper and lower ends of the connecting shaft 305 both pass through the fixed block 202 and are slidably connected to the fixed block 202. The connecting sleeve 304 is connected to the bearing of the connecting shaft 305, so that the connecting shaft 305 can drive the connecting sleeve 304 to move and can also rotate inside the connecting sleeve 304, thereby facilitating the driving of the second tilting block 303.

[0038] In addition, a first spring 306 is provided on the guide column 301, and one end of the first spring 306 is fixedly connected to the inner wall of the fixed block 202, and the other end of the first spring 306 is fixedly connected to the first inclined block 302. Through the provision of the first spring 306, when the second inclined block 303 releases the abutment against the first inclined block 302, the elastic restoring force of the first spring 306 can drive the guide column 301 to reset, thereby resetting the scraper 204 and maintaining the contracted state.

[0039] Specifically, according to the attached Figure 7 To Attachment Fig.10 As shown, the bearing on the connecting shaft 305 is connected to the sleeve block 307, and the bearing on the sleeve block 307 is connected to the roller 308. A limit ring 314 is also installed on the connecting shaft 305, and the limit ring 314 is located on the lower surface of the sleeve block 307, which is used to limit the movement of the sleeve block 307; a driving ring 311 is installed in the mixing tank 101, and the driving ring 311 is located on the moving track of the roller 308, and a smooth portion 312 and a protruding portion 313 are provided on the driving ring 311, and the smooth portion 312 is arranged parallel to the horizontal plane of the driving ring 311, and the protruding portion 313 protrudes to the end away from the driving ring 311, and the connection between the smooth portion 312 and the protruding portion 313 is arranged obliquely.

[0040] It should be noted that when the motor 104 drives the mixing shaft 105 to rotate, the roller 308 rotates synchronously on the lower surface of the driving ring 311, and sequentially contacts the smooth portion 312 and the protruding portion 313 on the driving ring 311, thereby controlling the roller 308 to move downward or reset.

[0041] When the roller 308 contacts the smooth portion 312 on the driving ring 311 , the roller 308 slides outside the smooth portion 312 , so that the second tilting block 303 remains stationary.

[0042] When the roller 308 contacts the protrusion 313 on the driving ring 311, the roller 308 moves along the outer inclined edge of the protrusion 313, thereby driving the second inclined block 303 to squeeze the first inclined block 302, so that the guide column 301 squeezes the scraper 204, so that the scraper 204 scrapes and cleans the inner wall of the mixing tank 101.

[0043] Among them, a platform for the roller 308 to move is provided on the protrusion 313. When the roller 308 moves to the connection between the smooth portion 312 and the protrusion 313, it moves along the inclined portion, thereby slowly releasing the contact between the scraper 204 and the inner wall of the mixing tank 101, so that the scraper 204 performs intermittent operation.

[0044] In other embodiments, in order to increase the intermittent time of the scraper 204, an electric push rod can be installed on the mixing tank 101, and the telescopic end of the electric push rod is fixedly connected to the drive ring 311, so as to control the up and down movement of the drive ring 311, thereby facilitating the control of the contact time between the roller 308 and the protrusion 313.

[0045] Furthermore, a connecting plate 315 is installed on one of the fixed blocks 202, and a bearing on the connecting plate 315 is connected to a sleeve 316, a spline shaft 317 is slidably connected in the sleeve 316, the spline shaft 317 is fixedly connected to the connecting shaft 305, and a second spring 318 is installed between the sleeve 316 and the spline shaft 317. The setting of the sleeve 316 and the spline shaft 317 facilitates the driving of the connecting shaft 305 to rotate. At the same time, when the roller 308 is squeezed to drive the second tilting block 303 to move, the connecting shaft 305 can also be axially displaced through the sliding connection between the sleeve 316 and the spline shaft 317.

[0046] It should be noted that a limiting groove 310 is provided on the connecting plate 315, and a limiting block 309 is slidably connected in the limiting groove 310. The limiting block 309 is installed on the sleeve block 307 and is slidably connected to the limiting block 309 through the limiting groove 310, so as to facilitate the rotation limitation of the sleeve block 307, and avoid the sleeve block 307 from rotating synchronously when the connecting shaft 305 rotates, thereby improving the stability of the sleeve block 307.

[0047] According to the attached Figure 3 To Attachment Figure 8As shown, a crushing mechanism 400 is provided on the side plate 201, which is used to crush the attachments attached to the inner wall of the mixing tank 101, so as to facilitate the mixing and processing of the concrete raw materials. In this embodiment, the crushing mechanism 400 includes a top plate 401 slidably connected to the fixed block 202, and a cutter 402 is installed on the top plate 401, a third spring 405 is installed between the side plate 201 and the top plate 401, a cam 403 is also installed on the connecting shaft 305, a gear 404 is installed on the shaft sleeve 316, and a gear ring 411 is also installed in the mixing tank 101, and the gear ring 411 is meshed and connected with the gear 404.

[0048] Specifically, when the mixing shaft 105 is driven to rotate, the gear 404 rotates outside the gear ring 411 with the mixing shaft 105 as the center. The gear 404 is meshed with the gear ring 411 to drive the connecting shaft 305 to rotate, so that the cam 403 rotates synchronously.

[0049] When the cam 403 rotates, the center of the circle between the cam 403 and the connecting shaft 305 is eccentrically set. Since the center of the circle between the cam 403 and the connecting shaft 305 is not on the same central axis, the cam 403 drives the cutter 402 to move toward the position of the scraper 204 once every rotation to cut the scraped attached raw materials. In addition, during the extrusion process of the top plate 401, the third spring 405 is elastically compressed, so that the third spring 405 has a restoring force. When the contact with the top plate 401 is released, the cutter 402 is reset by the action of the restoring force of the third spring 405.

[0050] Furthermore, a first bevel gear 406 is installed on the connecting shaft 305, and a second bevel gear 407 is meshedly connected to the first bevel gear 406, a rotating shaft 408 is installed on the second bevel gear 407, and the rotating shaft 408 passes through the top plate 401 and is connected to the side plate 201 by a bearing, and a crushing blade 409 is installed on the rotating shaft 408.

[0051] It should be understood that when the gear 404 is meshed and connected with the gear ring 411 and the driving connecting shaft 305 is rotated, the first bevel gear 406 rotates synchronously, and the first bevel gear 406 and the second bevel gear 407 are meshed and connected to drive the rotating shaft 408 to rotate, so that the crushing blade 409 rotates, thereby crushing the attachments passing through the scraper 204, avoiding the agglomeration of the raw materials adsorbed on the inner wall, resulting in uneven mixing of the concrete raw materials.

[0052] It should be noted that the outer bearing of the connecting shaft 305 is connected to a protective shell 410, and the protective shell 410 is provided to cover and protect the components inside the protective shell 410, thereby improving the stability of operation. The first bevel gear 406 and the second bevel gear 407 are both located inside the protective shell 410, and the rotating shaft 408 is connected to the bearing of the protective shell 410.

[0053] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A mixer for producing prestressed concrete pipe piles, characterized in that: include: A concrete mixer (100) is used for mixing concrete raw materials. The concrete mixer (100) comprises a mixing tank (101), and a motor (104) is installed on the mixing tank (101). A mixing shaft (105) is provided in the mixing tank (101), and a mixing blade (106) is installed on the mixing shaft (105); A scraping mechanism (200), the scraping mechanism (200) comprising a side plate (201), a fixing block (202) being mounted on the side plate (201), a connecting rod (203) being mounted on the fixing block (202), and the connecting rod (203) being fixedly connected to a mixing shaft (105), and a scraping plate (204) being disposed on a side of the side plate (201) away from the fixing block (202); A telescopic mechanism (300) is disposed between the side plate (201) and the scraper (204) to drive the scraper (204) to perform telescopic movement; When the scraper (204) is in the unfolded state, the scraper (204) comes into contact with the inner wall of the mixing tank (101) to scrape off the raw materials attached to the inner wall of the mixing tank (101); When the scraper (204) is in a retracted state, the scraper (204) is no longer in contact with the inner wall of the mixing tank (101), so that a rotation gap exists between the scraper (204) and the inner wall of the mixing tank (101), thereby reducing the wear of the inner wall of the mixing tank (101).

2. A mixer for producing prestressed concrete pipe piles according to claim 1, characterized in that: The telescopic mechanism (300) comprises a guide column (301) slidably connected to the fixed block (202), and one end of the guide column (301) is fixedly connected to the scraper (204), the other end of the guide column (301) is installed with a first tilting block (302), and the first tilting block (302) is provided with a second tilting block (303), the second tilting block (303) is installed with a connecting sleeve (304), and the inner bearing of the connecting sleeve (304) is connected with a connecting shaft (305), the upper and lower ends of the connecting shaft (305) both pass through the fixed block (202), the connecting shaft (305) is slidably connected to the fixed block (202), and the guide column (301) is also provided with a first spring (306).

3. A mixer for producing prestressed concrete pipe piles according to claim 2, characterized in that: The bearing on the connecting shaft (305) is connected to a sleeve block (307), and the bearing on the sleeve block (307) is connected to a roller (308). A driving ring (311) is installed in the mixing tank (101), and the driving ring (311) is located on the moving track of the roller (308).

4. A mixer for producing prestressed concrete pipe piles according to claim 3, characterized in that: The driving ring (311) is provided with a smooth portion (312) and a protruding portion (313); the smooth portion (312) is arranged parallel to the horizontal plane of the driving ring (311); the protruding portion (313) protrudes toward one end away from the driving ring (311); and the connection between the smooth portion (312) and the protruding portion (313) is arranged obliquely.

5. A mixer for producing prestressed concrete pipe piles according to claim 3, characterized in that: A limiting ring (314) is also installed on the connecting shaft (305), and the limiting ring (314) is located on the lower surface of the sleeve block (307) and is used to limit the movement of the sleeve block (307).

6. A mixer for producing prestressed concrete pipe piles according to claim 2, characterized in that: A connecting plate (315) is installed on one group of the fixed blocks (202), and a shaft sleeve (316) is connected to a bearing on the connecting plate (315), a spline shaft (317) is slidably connected inside the shaft sleeve (316), the spline shaft (317) is fixedly connected to the connecting shaft (305), and a second spring (318) is installed between the shaft sleeve (316) and the spline shaft (317).

7. A mixer for producing prestressed concrete pipe piles according to claim 6, characterized in that: The connection plate (315) is provided with a limiting groove (310), and a limiting block (309) is slidably connected in the limiting groove (310), and the limiting block (309) is installed on the sleeve block (307).

8. A mixer for producing prestressed concrete pipe piles according to claim 6, characterized in that: The side plate (201) is provided with a crushing mechanism (400) for crushing the attachments attached to the inner wall of the mixing tank (101). The crushing mechanism (400) comprises a top plate (401) slidably connected to the fixed block (202), and a cutter (402) is installed on the top plate (401). A third spring (405) is installed between the side plate (201) and the top plate (401).

9. A mixer for producing prestressed concrete pipe piles according to claim 8, characterized in that: A cam (403) is also installed on the connecting shaft (305), and the center of the circle between the cam (403) and the connecting shaft (305) is eccentrically arranged. A gear (404) is installed on the shaft sleeve (316). A gear ring (411) is also installed in the mixing tank (101), and the gear ring (411) is meshedly connected with the gear (404).

10. A mixer for producing prestressed concrete pipe piles according to claim 8, characterized in that: The connecting shaft (305) is provided with a first bevel gear (406), and the first bevel gear (406) is meshedly connected with a second bevel gear (407), a rotating shaft (408) is provided on the second bevel gear (407), and the rotating shaft (408) passes through the top plate (401) and is connected to the side plate (201) by a bearing, and a crushing blade (409) is provided on the rotating shaft (408).

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