Continuous tumbler

Abstract

A continuous tumbler, comprising a rotation driving mechanism, a lifting driving mechanism, a rack, a bottom frame and a drum, wherein the drum is mounted on the inner side of the rack; the rack is mounted above the bottom frame; the lifting driving mechanism is fixedly connected to the bottom frame; one side of the rack is fixedly connected to a lifting rod of the lifting driving mechanism, and the other side of the rack is rotatably connected to the bottom frame; and the rotation driving mechanism is connected to the drum and is used for driving the drum to rotate about its own axis. The tumbler can achieve continuous and automatic feeding and discharging, a meat product is in a continuous tumbling state during the process from entering the drum to leaving the drum, continuous tumbling can accelerate the softening of the tissue structure, increase the absorption rate of a pickling solution, and shorten the pickling time, continuous tumbling is more conducive to improving the pickling efficiency, and a product has a better sensory quality and flavor.

Description

A continuous tumbling machine Technical Field

[0001] The invention relates to the technical field of food processing equipment, in particular to a continuous tumbling machine. Background Art

[0002] After the brine injection, the meat needs to be tumbled and kneaded. Tumbling and kneading refers to the process of rolling, dropping and kneading the meat embryo so that the added marinade and seasonings can be quickly and evenly diffused into the muscle fiber tissue. Tumbling and kneading can accelerate the penetration and color development of the marinade. By using the principle of physical impact, the marinated meat is dropped and rubbed, causing the meat to loosen and the myofibrils to break, which greatly increases the penetration rate of the marinade. It can also make the injected marinade evenly distributed in the meat, thereby absorbing a large amount of brine. This not only shortens the marinating period, but also improves the product yield and tenderness.

[0003] Existing tumblers usually install a stirring mechanism in an integral drum, and a meat inlet and outlet are provided on one side of the drum. After the meat enters, the stirring shaft of the stirring mechanism runs and the meat is tumbled and kneaded by the blades on the stirring shaft. This type of tumbler has obvious defects. On the one hand, the meat needs to be taken in and out from one position, and the tumbler cannot work continuously. After completing the processing of a group of meat, it needs to be stopped for material replacement, which affects the processing efficiency. On the other hand, it cannot effectively seal the pinholes of the meat, so that the corresponding pickling liquid in the meat will have a certain leakage loss, which also affects the meat's absorption of brine and thus affects the quality of the meat.

[0004] Summary of the Invention

[0005] To solve the above technical problems, the present invention relates to a continuous tumbling machine, which has a simple and reliable structure, effectively solves the above technical problems, and is suitable for popularization and use. To achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] A continuous tumbling machine includes a rotary drive mechanism, a lifting drive mechanism, a frame, a bottom frame, and a roller. The roller is installed on the inner side of the frame, and the frame is installed above the bottom frame. The lifting drive mechanism is fixedly connected to the bottom frame, one side of the frame is fixedly connected to the lifting rod of the lifting drive mechanism, and the other side of the frame is rotatably connected to the bottom frame. The rotary drive mechanism is connected to the roller and is used to drive it to rotate around its own axis.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the roller includes a front turntable, a rear turntable, a first tumbling support rod, a second tumbling support rod, and a third tumbling support rod, the front turntable and the rear turntable are relatively arranged at the front and rear ends of the frame, the front turntable and the rear turntable are both provided with a plurality of first limiting holes, second limiting holes, and third limiting holes, the two ends of the first tumbling support rod are respectively inserted into the first limiting holes of the front turntable and the rear turntable, the two ends of the second tumbling support rod are respectively inserted into the second limiting holes of the front turntable and the rear turntable, The two ends of the rod are respectively inserted into the third limiting holes of the front turntable and the rear turntable, the diameter of the first tumbling support rod is smaller than the diameter of the second tumbling support rod, the diameter of the second tumbling support rod is smaller than the diameter of the third tumbling support rod, the adjacent first tumbling support rod and the third tumbling support rod form a tumbling group a, the adjacent first tumbling support rod and the second tumbling support rod form a tumbling group b, each tumbling group a and the three consecutive adjacent b tumbling groups form a unit tumbling group, and several of the unit tumbling groups are evenly spaced around the circumferential direction and form a tumbling channel inside them.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a fourth tumbling and kneading support rod, the diameter of the third tumbling and kneading support rod is smaller than the diameter of the fourth tumbling and kneading support rod, the two fourth tumbling and kneading support rods are arranged opposite to each other and are fixedly connected to a third tumbling and kneading support rod by bolts respectively, and the fourth tumbling and kneading support rod is arranged parallel to the third tumbling and kneading support rod and is located on the inner side of the drum.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: it also includes a limit plate, several of the limit plates are evenly spaced along the axis direction of the roller, the limit plates are sleeved on the outside of the roller and are provided with limit grooves adapted to the first tumbling support rod, the second tumbling support rod, and the third tumbling support rod, and the limit plates are used to limit and shape the roller composed of several first tumbling support rods, the second tumbling support rods, and the third tumbling support rods.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the inner hole of the front turntable is fixedly connected to the front support cylinder, the inner hole of the rear turntable is fixedly connected to the rear support cylinder, the front side of the frame is provided with a front roller support group, the front roller support group is used to support the front support cylinder and is in rolling contact with the front support cylinder, and the rear side of the frame is provided with a rear roller support group, the rear roller support group is used to support the rear support cylinder and is in rolling contact with the rear support cylinder.

[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the rotation drive mechanism includes a drive motor, a sprocket, and a transmission chain, the drive motor is fixedly connected to the bottom frame, the output end of the drive motor is fixedly connected to the sprocket, the outer circumferential surface of the front support cylinder is provided with a plurality of limit blocks evenly spaced along the circumferential direction, the transmission chain is wound around the outside of the sprocket and the front support cylinder, the limit blocks of the front support cylinder are inserted into the chain link gap of the transmission chain, and the transmission chain pulls the front support cylinder to rotate through the limit blocks.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: the lifting drive mechanism includes a first articulated seat, a second articulated seat, and a screw lift, the first articulated seat is fixedly connected to the bottom frame, the second articulated seat is fixedly connected to the frame, the body of the screw lift is rotatably connected to the first articulated seat, the lifting rod of the screw lift is connected to a fisheye bearing, the fisheye bearing is rotatably connected to the second articulated seat, and an adjusting rocker is provided on one side of the screw lift.

[0013] On the basis of the above solution and as a preferred solution of the above solution: an air intake duct assembly is provided at the bottom of the rack, and the air intake duct assembly is used to introduce gas into the interior of the rack.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: a roller is provided at each of the four corners of the bottom of the bottom frame, a cross bar is provided on the front side of the bottom frame, and two left-right symmetrical clamping plates and two left-right symmetrical positioning rods are provided on the front side of the cross bar.

[0015] On the basis of the above solution and as a preferred solution of the above solution: a downwardly inclined arc-shaped material discharge guide plate is provided on the rear side of the frame.

[0016] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0017] 1. Several of the unit tumbling and kneading groups are evenly spaced around the circumference to form a drum structure and a tumbling and kneading channel is formed inside the drum. There is a gap between adjacent tumbling and kneading support rods. Since the diameters of the tumbling and kneading support rods are different, a concave and convex extrusion surface is formed on the inner side of the drum. When the entire drum starts to rotate, the meat will collide, rub and squeeze against each other under the pressure of the tumbling and kneading support rods on the inner side of the drum, which will reduce the mechanical strength of the muscle fibers and connective tissue and destroy the cell structure. At the same time, the extrusion and deformation of the muscle promotes the migration and diffusion of solutes, evenly distributes the salt, and combines with the mechanical action to increase the solubility of protein, thereby improving the tenderness and edibility of the meat raw materials and making the tumbling and kneading more uniform. In this way, the needle holes of the meat can also be effectively sealed, and the absorption of brine by the meat can be improved, thereby affecting the quality of the meat. The continuous shrinkage of the injection holes can also restore the integrity of the muscle to a certain extent.

[0018] 2. The staff can control the rocker to drive the lifting rod of the screw lift to do the lifting movement. The lifting drive mechanism can drive one end of the frame to drop so that the inner roller is tilted. It is only necessary to make the height of the rear discharge port lower than the height of the front feed port so that the meat will gradually move downward and closer to the discharge port while being rolled in the drum, so that automatic discharge can be achieved in the end. The front side of the drum can be continuously fed. The simultaneous feeding and discharging can effectively improve the processing efficiency and save time.

[0019] 3. The meat is in a continuous tumbling and kneading state from the time it enters the drum to the time it leaves the drum. Continuous tumbling and kneading can accelerate the softening of the tissue structure, increase the absorption rate of the marinade, and shorten the marinating time. Continuous tumbling and kneading is more conducive to improving the marinating efficiency, and the product has better sensory quality and flavor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the equipment feed port;

[0021] Figure 2 is a schematic diagram of the equipment discharge port;

[0022] Figure 3 is a schematic diagram of the drum structure;

[0023] Figure 4 is a schematic diagram of the rack;

[0024] Figure 5 is a schematic diagram of a rotary drive mechanism;

[0025] FIG6 is a schematic diagram of a lifting drive mechanism. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments. However, the specific implementation methods and embodiments described below are only for illustrative purposes and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in FIG1 , and are only for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0029] In order to solve the above technical problems, as shown in Figures 1-6, the present invention designs a continuous tumbling machine, including a rotation drive mechanism 1, a lifting drive mechanism 2, a frame 3, a bottom frame 4, and a roller 5. Specifically, the roller 5 is installed on the inner side of the frame 3, and the roller 5 includes a front turntable 51, a rear turntable 52, a first tumbling support rod 53, a second tumbling support rod 54, and a third tumbling support rod 55. The front turntable 51 and the rear turntable 52 are relatively arranged at the front and rear ends of the frame 3, and the front turntable 51 and the rear turntable 52 are both provided with a plurality of first limiting holes 56, second limiting holes 57, and third limiting holes 58. The first and second limiting holes 57 and the third limiting hole 58 are respectively inserted into the first limiting holes 56 of the front turntable 51 and the rear turntable 52 at both ends of the first tumbling and kneading support rod 53, and the second and second limiting holes 57 and the third limiting holes 58 of the front turntable 51 and the rear turntable 52 at both ends of the second tumbling and kneading support rod 54 are respectively inserted into the second limiting holes 57 of the front turntable 51 and the rear turntable 52 at both ends of the third tumbling and kneading support rod 55. The diameter of the first tumbling and kneading support rod 53 is smaller than the diameter of the second tumbling and kneading support rod 54, and the diameter of the second tumbling and kneading support rod 54 is smaller than the diameter of the third tumbling and kneading support rod 55. The adjacent first tumbling support rod 53 and the third tumbling support rod 55 form a tumbling group a, and the adjacent first tumbling support rod 53 and the second tumbling support rod 54 form a tumbling group b. Each tumbling group a and the three consecutive adjacent tumbling groups b form a unit tumbling group. Several of the unit tumbling groups are evenly spaced around the circumference to form a roller 5 structure and a tumbling channel is formed inside it. There are gaps between adjacent tumbling support rods. Since the diameters of the tumbling support rods are different, the inner side of the roller 5 forms a concave and convex extrusion surface. When the entire roller 5 starts to rotate, The meat will collide, rub and squeeze against each other on the inside of the drum 5 under the pressure of the tumbling support rod, which will reduce the mechanical strength of muscle fibers and connective tissues and destroy the cell structure. At the same time, the muscle extrusion and deformation promotes the migration and diffusion of solutes, evenly distributes the salt, and combines with the mechanical action to improve the solubility of protein, thereby improving the tenderness and edibility of the meat raw materials. The tumbling is more uniform, and this method can also effectively seal the needle holes of the meat, improve the absorption of brine by the meat, and thus affect the quality of the meat. The continuous shrinkage of the injection holes can also restore the integrity of the muscle to a certain extent.

[0030] Preferably, the drum 5 also includes a fourth tumbling and kneading support rod 59, the diameter of the third tumbling and kneading support rod 55 is smaller than the diameter of the fourth tumbling and kneading support rod 59, the two fourth tumbling and kneading support rods 59 are arranged opposite to each other and are fixedly connected to a third tumbling and kneading support rod 55 by a bolt 510 respectively, and the bolt 510 radially penetrates the third tumbling and kneading support rod 55 and is fixedly connected to the fourth tumbling and kneading support rod 59. The bolt connection method is stable and convenient to disassemble. The fourth tumbling and kneading support rod 59 is arranged parallel to the third tumbling and kneading support rod 55 and is located on the inner side of the drum 5. The setting of the fourth tumbling and kneading support rod 59 can effectively push the meat to rotate with the drum 5 when the drum 5 rotates, so that the meat can fully contact the tumbling and kneading support rods of different sizes during the rotation and be fully massaged and squeezed, so that the needle hole closes quickly and the marinade can quickly complete full penetration.

[0031] The structure of the roller 5 also includes a limit plate 511, and several of the limit plates 511 are evenly spaced along the axial direction of the roller 5. The limit plates 511 are sleeved on the outside of the roller 5 and are provided with limit grooves adapted to the first tumbling support rod 53, the second tumbling support rod 54, and the third tumbling support rod 55. The limit plates 511 are used to limit and shape the roller 5 composed of several first tumbling support rods 53, the second tumbling support rods 54, and the third tumbling support rods 55. The limit plates 511 limit and support each tumbling support rod from the outside to prevent it from deformation during the tumbling process and provide sufficient support.

[0032] Furthermore, the inner hole of the front turntable 51 is fixedly connected with a front support cylinder 512, and the inner hole of the rear turntable 52 is fixedly connected with a rear support cylinder 513. The front side of the frame 3 is provided with a front roller support group 6, and the front roller support group 6 is used to support the front support cylinder 512 and is in rolling contact with the front support cylinder 512. The rear side of the frame 3 is provided with a rear roller support group, and the rear roller support group is used to support the rear support cylinder 513 and is in rolling contact with the rear support cylinder 513, so that the drum 5 can rotate around its own axis direction. Accordingly, the drum 5 is driven by a rotation drive mechanism 1, and the rotation drive mechanism 1 includes a drive motor 11, a sprocket 12, and a transmission chain 13. The machine 11 is fixedly connected to the bottom frame 4, the output end of the driving motor 11 is fixedly connected to the sprocket 12, and the outer circumferential surface of the front support cylinder 512 is provided with a plurality of limit blocks 14 evenly spaced along the circumferential direction. The transmission chain 13 is wound around the outside of the sprocket 12 and the front support cylinder 512, and the limit blocks 14 of the front support cylinder 512 are inserted into the chain link gaps of the transmission chain 13. The driving motor 11 can drive the sprocket 12 to rotate, and the transmission chain 13 will run accordingly. The transmission chain 13 pulls the front support cylinder 512 to rotate around its own axis through the limit blocks 14 on the outside of the front support cylinder 512, so that the rotating cylinder can continue to rotate.

[0033] The lifting drive mechanism 2 is fixedly connected to the bottom frame 4, one side of the frame 3 is fixedly connected to the lifting rod of the lifting drive mechanism 2, and the other side of the frame 3 is rotatably connected to the bottom frame 4. Specifically, the frame 3 is installed above the bottom frame 4, and the lifting drive mechanism 2 includes a first hinge seat 21, a second hinge seat 22, and a screw lift 23. The first hinge seat 21 is fixedly connected to the bottom frame 4, the second hinge seat 22 is fixedly connected to the frame 3, the body of the screw lift 23 is rotatably connected to the first hinge seat 21, the lifting rod of the screw lift 23 is connected to a fisheye bearing, and the fisheye The bearing is rotatably connected to the second hinge seat 22. An adjusting rocker 24 is provided on one side of the screw lift 23. The staff can drive the lifting rod of the screw lift 23 to perform lifting movements by controlling the adjusting rocker 24. The lifting drive mechanism 2 can drive one end of the frame 3 to descend so that the roller 5 inside it is tilted. It is only necessary to make the height of the discharge port on the rear side lower than the height of the feed port on the front side so that the meat will gradually move downward and closer to the discharge port while being rolled in the roller 5, thereby finally realizing automatic discharging. The front side of the roller 5 can be continuously fed, and the simultaneous feeding and discharging effectively improves the processing efficiency and saves time.

[0034] It is further preferred in this embodiment that an air intake duct assembly 7 is provided at the bottom of the frame 3, and the air intake duct assembly 7 is provided with an air intake main pipe and an air outlet branch pipe, and the air outlet branch pipe is directly connected to the bottom plate of the frame 3. The air intake duct assembly 7 is used to introduce gas into the interior of the frame 3 from bottom to top. Since there is a gap between the rolling support rods of the drum 5, it will not affect the circulation of gas. The air intake duct can be connected to the corresponding air supply mechanism according to the actual needs of the meat products. During the rolling process, antibacterial gas such as N2, O2, CO2 and other mixed gases are pressurized and filled, which can not only inhibit the growth of potential microorganisms, but also increase the friction work of the meat blocks during the falling process of the meat blocks, thereby improving mechanical efficiency, allowing the marinade to penetrate quickly, and thereby improving the water holding capacity of the raw meat, and improving the texture and color of the meat.

[0035] It is further preferred in this embodiment that a roller 41 is provided at each of the four corners of the bottom of the bottom frame 4, a cross bar 42 is provided on the front side of the bottom frame 4, and two left-right symmetrical clamping plates 43 and two left-right symmetrical positioning rods 44 are provided on the front side of the cross bar 42. The setting of the clamping plates 43 can enable the bottom frame 4 to be docked with the front brine injection equipment, so that the meat produced after the brine injection can be directly introduced into the front feed port of the drum 5.

[0036] It is further preferred in this embodiment that baffles are provided on the front and rear sides of the frame 3, so that only the feed port and the discharge port of the drum 5 are exposed to the outside, and the rear side of the frame 3 is also provided with a downward-inclined arc-shaped discharge guide plate 8, so that the meat can move along the arc-shaped discharge guide plate 8 and fall into the designated position when it is discharged.

[0037] It is further preferred in this embodiment that rotatable protective plates 9 are symmetrically provided on the left and right sides of the frame 3, and a handle is provided on the outside of the protective plate 9. The staff can adjust the handle to open the protective plate 9 to expose the structure of the drum 5, which is convenient for later cleaning or maintenance and repair.

[0038] It is worth noting that the technical features such as motors and screw lifts involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional means in the field and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0039] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made by technicians in the relevant technical field based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A continuous tumbling machine, characterized in that: It includes a rotary drive mechanism, a lifting drive mechanism, a frame, a bottom frame, and a roller. The roller is installed on the inner side of the frame, and the frame is installed above the bottom frame. The lifting drive mechanism is fixedly connected to the bottom frame. One side of the frame is fixedly connected to the lifting rod of the lifting drive mechanism, and the other side of the frame is rotatably connected to the bottom frame. The rotary drive mechanism is connected to the roller and is used to drive it to rotate around its own axis.

2. A continuous tumbling machine according to claim 1, characterized in that: The roller includes a front turntable, a rear turntable, a first tumbling support rod, a second tumbling support rod, and a third tumbling support rod, the front turntable and the rear turntable are relatively arranged at the front and rear ends of the frame, the front turntable and the rear turntable are both provided with a plurality of first limiting holes, second limiting holes, and third limiting holes, the two ends of the first tumbling support rod are respectively inserted into the first limiting holes of the front turntable and the rear turntable, the two ends of the second tumbling support rod are respectively inserted into the second limiting holes of the front turntable and the rear turntable, and the two ends of the third tumbling support rod are respectively inserted into the front turntable In the third limiting hole of the disc and the rear turntable, the diameter of the first tumbling support rod is smaller than the diameter of the second tumbling support rod, the diameter of the second tumbling support rod is smaller than the diameter of the third tumbling support rod, the adjacent first tumbling support rod and the third tumbling support rod form a tumbling group a, the adjacent first tumbling support rod and the second tumbling support rod form a tumbling group b, each tumbling group a and the three consecutive adjacent b tumbling groups form a unit tumbling group, and several of the unit tumbling groups are evenly spaced around the circumferential direction and form a tumbling channel inside them.

3. A continuous tumbling machine according to claim 2, characterized in that: It also includes a fourth tumbling and kneading support rod, the diameter of the third tumbling and kneading support rod is smaller than the diameter of the fourth tumbling and kneading support rod, the two fourth tumbling and kneading support rods are arranged opposite to each other and are fixedly connected to a third tumbling and kneading support rod by bolts respectively, and the fourth tumbling and kneading support rod is arranged parallel to the third tumbling and kneading support rod and is located on the inner side of the drum.

4. A continuous tumbling machine according to claim 3, characterized in that: It also includes a limit plate, several of which are evenly spaced along the axis of the roller. The limit plate is sleeved on the outside of the roller and is provided with a limit groove adapted to the first tumbling support rod, the second tumbling support rod, and the third tumbling support rod. The limit plate is used to limit and shape the roller composed of several first tumbling support rods, the second tumbling support rods, and the third tumbling support rods.

5. The continuous tumbling machine according to claim 4, characterized in that: The inner hole of the front turntable is fixedly connected to the front support cylinder, the inner hole of the rear turntable is fixedly connected to the rear support cylinder, the front side of the frame is provided with a front roller support group, the front roller support group is used to support the front support cylinder and is in rolling contact with the front support cylinder, and the rear side of the frame is provided with a rear roller support group, the rear roller support group is used to support the rear support cylinder and is in rolling contact with the rear support cylinder.

6. The continuous tumbling machine according to claim 5, characterized in that: The rotary drive mechanism includes a drive motor, a sprocket, and a transmission chain. The drive motor is fixedly connected to the bottom frame, and the output end of the drive motor is fixedly connected to the sprocket. The outer circumferential surface of the front support cylinder is provided with a plurality of limit blocks evenly spaced along the circumferential direction. The transmission chain is wound around the outside of the sprocket and the front support cylinder. The limit blocks of the front support cylinder are inserted into the chain link gaps of the transmission chain. The transmission chain pulls the front support cylinder to rotate through the limit blocks.

7. The continuous tumbling machine according to claim 1, characterized in that: The lifting drive mechanism includes a first articulated seat, a second articulated seat, and a screw lift. The first articulated seat is fixedly connected to the bottom frame, the second articulated seat is fixedly connected to the frame, the body of the screw lift is rotatably connected to the first articulated seat, the lifting rod of the screw lift is connected to a fisheye bearing, and the fisheye bearing is rotatably connected to the second articulated seat. An adjusting rocker is provided on one side of the screw lift.

8. The continuous tumbling machine according to claim 1, characterized in that: An air intake duct assembly is provided at the bottom of the frame, and the air intake duct assembly is used to introduce gas into the interior of the frame.

9. The continuous tumbling machine according to claim 1, characterized in that: A roller is respectively provided at the four corners of the bottom of the bottom frame, a cross bar is provided on the front side of the bottom frame, and two left-right symmetrical clamping plates and two left-right symmetrical positioning rods are provided on the front side of the cross bar.

10. The continuous tumbling machine according to claim 1, characterized in that: A downwardly inclined arc-shaped material unloading guide plate is provided on the rear side of the frame.

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