Bucket elevator

Abstract

The utility model provides a kind of bucket elevator belongs to food processing machinery technical field, including lifting frame, hopper, lifting driving part and position detection component;Lifting frame is equipped with guide slot, guide slot has lifting guide section and overturning guide section, overturning guide section is curved and extends towards the front of lifting frame at the top of lifting guide section;Hopper has first connecting point and second connecting point with front and rear interval and upside-down dislocation, first connecting point is equipped with guide pulley for rolling in guide slot;Lifting driving part is located in lifting frame and output end connects second connecting point;Position detection component is located in lifting frame and is used to detect the output end position of lifting driving part;Lifting driving part is used to slow down when its output end moves upward and height reaches first setting value, stop when reaching second setting value.The bucket elevator provided by the utility model can solve the problem of serious spatter of frying oil during the feeding process of the frying equipment.

Description

Technical Field

[0001] This utility model belongs to the field of food processing machinery technology, specifically relating to a bucket elevator. Background Technology

[0002] Bucket elevators are commonly used feeding equipment in the field of fried food processing. Their purpose is to lift materials to the target height and then flip and pour them into the frying equipment, thereby avoiding burns caused by the splashing of high-temperature frying oil when manually adding materials into the frying equipment.

[0003] In existing technologies, bucket elevators mostly utilize curved guide rails in conjunction with lifting drive components to raise the buckets to a target height, where they then flip under the guidance of the guide rails, thereby feeding the frying equipment. For example, the applicant's existing patent (202020725545.X, Feeding Device for Oil Residue Food) adopts this form. However, in actual operation, the applicant has found that the current solution still suffers from severe oil splattering during the feeding process, therefore, technical improvements are still needed to address this issue. Utility Model Content

[0004] This utility model provides a bucket elevator, which aims to solve the problem of severe oil splashing during the feeding process of frying equipment using a bucket elevator.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a bucket elevator, comprising: A lifting frame is used to fix it to the ground. The lifting frame is provided with a guide groove, which has a lifting guide section and a tilting guide section. The lifting guide section extends vertically on the lifting frame, and the tilting guide section extends curved towards the front of the lifting frame from the top of the lifting guide section. The hopper has a first connection point and a second connection point that are spaced apart front to back and staggered vertically. The first connection point is provided with a guide wheel for rolling in the guide groove, and the front end of the hopper has an extended guide groove. The lifting drive component is located on the lifting frame, and its output end is used to connect to the second connection point. A position detection component is installed on the lifting frame and is used to detect the position of the output end of the lifting drive component; The lifting drive is used to decelerate when it moves upward at its output end and reaches a first set value, and to stop when it reaches a second set value.

[0006] In one possible implementation, the lifting drive includes: The drive shaft and driven shaft are rotatably connected to the lower and upper ends of the lifting frame, respectively. Both ends of the drive shaft are fitted with drive sprockets, and both ends of the driven shaft are fitted with driven sprockets. Two drive chains are respectively fitted onto the drive sprocket and the driven sprocket, which are aligned vertically. The hopper has a second connection point on both sides, and the two drive chains together serve as the output end of the lifting drive component, which is connected to the two second connection points respectively. The position detection component is used to detect the rotation angle of the drive shaft and / or driven shaft.

[0007] In some embodiments, the position detection component includes: A fixed seat is fitted around the outer circumference of the drive shaft and fixedly connected to the lifting frame; A gear disc is fixedly sleeved onto one end of the drive shaft, and a ring of sensing teeth is formed on the edge of the gear disc. A counting sensor is mounted on a fixed base with its sensing end facing the edge of the toothed disc. The toothed disc rotates with the drive shaft, and a counting signal is triggered when each sensing tooth passes the counting sensor.

[0008] For example, the hopper includes a hopper body and a guide channel; the front end of the hopper body has an upwardly inclined discharge channel, the side wall of the discharge channel is provided with a first connection point and a second connection point, and the front port of the discharge channel is provided with an adjusting baffle; the guide channel is connected to the front port of the discharge channel.

[0009] For example, the adjusting baffle has a first elongated hole at both ends of its edge. The first elongated hole extends along the height direction of the discharge channel. The adjusting baffle is connected to the discharge channel by fasteners passing through the first elongated holes.

[0010] In one possible implementation, the sidewall of the guide channel is provided with at least one second elongated hole extending along the discharge direction of the discharge channel, and the guide channel is fixed to the sidewall of the discharge channel by fasteners passing through the second elongated hole.

[0011] In some embodiments, a cover plate is provided at the top of the hopper near the discharge channel. One end of the cover plate is connected to the top surface of the discharge channel, and the other end forms a feed inlet between the cover plate and the rear end wall of the hopper.

[0012] For example, the rear end of the bucket body is open and slidably connected to a telescopic bucket, and the side wall of the telescopic bucket is provided with a third elongated hole. The telescopic bucket is fixed to the side wall of the bucket body by fasteners passing through the third elongated hole.

[0013] For example, the width of the guide channel gradually narrows from one end near the discharge channel to the other.

[0014] In some embodiments, the lifting frame is provided with two guide grooves with opposite openings, and both sides of the hopper have a first connection point for connecting guide wheels, and the first connection point is higher than the second connection point. The two guide wheels roll in one of the guide grooves respectively.

[0015] The beneficial effects of the bucket elevator provided by this utility model are as follows: Compared with the prior art, in this bucket elevator, after the material is loaded into the bucket, the output end of the lifting drive component drives the bucket to rise through the first connection point. During the rising process, the lifting guide section of the guide groove constrains the guide wheel, ensuring the stability of the bucket's movement. When the bucket rises to the point where the guide wheel enters the flipping guide section, the direction of the guide wheel's movement changes. Therefore, as the second connection point continues to rise under the drive of the lifting drive component, it drives the bucket to flip forward, thus pouring the material in the bucket into the frying equipment. During the rising process, the position detection component can detect the position of the output end of the acoustic cavity drive component in real time. When the position detection component detects that the height of its output end has reached the first set value, the lifting drive component begins to decelerate, thereby reducing the flipping speed of the bucket and allowing the material in the bucket to slowly slide into the frying equipment along the guide groove. Thus, by reducing the pouring speed and by using the guide groove to buffer the material, the impact force on the frying oil during the pouring process can be greatly reduced, thereby improving the frying oil splashing phenomenon during the feeding process of the frying equipment and helping to improve the safety of the bucket elevator and its market reputation. Attached Figure Description

[0016] Figure 1 This is a side view of the bucket elevator in the bucket lifting state provided in an embodiment of the present utility model; Figure 2 This is a side view of the bucket elevator provided in this embodiment of the present invention when the bucket is tipping over to unload material. Figure 3 This is a front view of the position detection component used in an embodiment of the present utility model. Figure 4 This is a three-dimensional structural diagram of the hopper in the lifting state as used in the embodiment of this utility model. Figure 5 This is a three-dimensional structural diagram of the hopper in the flipped state used in the embodiment of this utility model.

[0017] In the diagram: 10. Lifting frame; 100. Guide groove; 101. Lifting guide section; 102. Tilting guide section; 20. Hopper; 201. First connection point; 202. Second connection point; 21. Hopper body; 211. Guide wheel; 212. Discharge channel; 213. Adjusting baffle; 2131. First elongated hole; 214. Cover plate; 215. Feed inlet; 216. Telescopic bucket; 2161. Third elongated hole; 22. Guide groove; 221. Second elongated hole; 30. Lifting drive component; 31. Drive shaft; 32. Driven shaft; 33. Drive chain; 40. Position detection component; 41. Fixed base; 42. Gear plate; 421. Sensing tooth; 43. Counting sensor. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0020] Please refer to the following: Figures 1 to 5 The bucket elevator provided by this utility model will now be described. The bucket elevator includes a lifting frame 10, a bucket 20, a lifting drive component 30, and a position detection component 40. The lifting frame 10 is fixed to the ground and has a guide groove 100. The guide groove 100 has a lifting guide section 101 and a tilting guide section 102. The lifting guide section 101 extends vertically on the lifting frame 10, and the tilting guide section 102 extends curvedly towards the front of the lifting frame 10 from the top of the lifting guide section 101. The bucket 20 has first connection points 20 that are spaced apart front to back and staggered vertically. 1. A second connection point 202 is provided. The first connection point 201 is provided with a guide wheel 211 for rolling in the guide groove 100. The front end of the hopper 20 has an extended guide groove 22. The lifting drive 30 is provided on the lifting frame 10 and its output end is used to connect to the second connection point 202. The position detection component 40 is provided on the lifting frame 10 and is used to detect the position of the output end of the lifting drive 30. The lifting drive 30 is used to decelerate when its output end moves upward and the height reaches a first set value, and stop when it reaches a second set value.

[0021] It should be noted that the bucket elevator provided in this embodiment is equipped with a controller. In the prior art, the controller is used by the operator to control the start and stop of the lifting drive 30 and the direction of movement of the output end. However, in this embodiment, the controller's function is not only to control the start and stop and the direction of movement of the lifting drive 30, but also to receive the electrical signals from the position detection component 40 and make logical adjustments to the lifting speed of the output end of the lifting drive 30 based on the received electrical signals. Of course, the controller here can be a controller built into the lifting drive 30, or it can be a controller provided based on the automatic control requirements of this embodiment. The controller solution is a very mature prior art and is not a technical point of this application, so it will not be described in detail here.

[0022] It should be understood that in this embodiment, the first setting value is less than the second setting value. Specifically, the first setting value can be the height of the second connection point 202 when the hopper 20 is raised to the point where its guide wheel 211 just enters the flipping guide section 102, while the second setting value can be the height of the second connection point 202 after the hopper 20 is flipped to the target angle. By adjusting the second setting value, the flipping angle of the hopper 20 can be adjusted, so that the discharge speed can meet the expectations by adjusting the flipping angle of the hopper 20 for different materials.

[0023] In this embodiment, the lifting drive component 30 can be any drive component that can output power in the vertical direction, such as a telescopic cylinder, an electric push rod, or a sprocket and chain drive pair driven by a motor. Considering the speed adjustment requirements, a solution using a motor as the power source in conjunction with a sprocket and chain drive pair is preferred.

[0024] It should be noted that in this embodiment, the bottom of the lifting frame 10 can be provided with a horizontal guide rail to drive the hopper 20 to move horizontally. In this case, the guide wheel 211 and the guide groove 100, and the second connection point 202 and the output end of the lifting drive component 30 should all be connected by a live connection. Of course, this function has been applied in the prior art mentioned above, so it will not be described in detail here.

[0025] In this embodiment, the position detection component 40 can be a proximity sensor set at a corresponding height position of the lifting frame 10. When the hopper 20 passes the proximity sensor, it can trigger an electrical signal to serve as the timing for speed adjustment or start / stop of the lifting drive component 30. Alternatively, the position detection component 40 can detect the height of the output end of the lifting drive component 30 through a distance sensor. In short, any scheme that can detect the target position can be applied to this embodiment, and no limitation is made here.

[0026] Compared with the prior art, the bucket elevator provided in this embodiment, after the material is loaded into the hopper 20, the output end of the lifting drive component 30 drives the hopper 20 to rise through the first connection point 201. During the rising process, the lifting guide section 101 of the guide groove 100 constrains the guide wheel 211 to ensure the smooth movement of the hopper 20. When the hopper 20 rises to the point where the guide wheel 211 enters the flipping guide section 102, the movement direction of the guide wheel 211 changes. Therefore, as the second connection point 202 continues to rise under the drive of the lifting drive component 30, it will drive the hopper 20 to flip forward, thereby pouring the material in the hopper 20 into the frying equipment. During the ascent, the position detection component 40 can detect the position of the output end of the acoustic cavity drive component in real time. When the position detection component 40 detects that the height of its output end has reached the first set value, the lifting drive component 30 starts to decelerate, thereby reducing the turning speed of the hopper 20. This allows the material in the hopper 20 to slowly slide into the frying equipment along the guide channel 22. By reducing the pouring speed and buffering the material through the guide channel 22, the impact force on the frying oil during the pouring process can be greatly reduced, thereby improving the frying oil splashing phenomenon during the feeding process of the frying equipment. This helps to improve the safety of the bucket elevator and its market reputation.

[0027] In some embodiments, see Figures 1 to 3 The lifting drive component 30 includes a drive shaft 31, a driven shaft 32, and two drive chains 33. The drive shaft 31 and the driven shaft 32 are rotatably connected to the lower and upper ends of the lifting frame 10, respectively. Both ends of the drive shaft 31 are fitted with drive chain 33 wheels, and both ends of the driven shaft 32 are fitted with driven sprockets. The two drive chains 33 are respectively fitted onto the vertically aligned drive chain 33 wheels and driven sprockets. The hopper 20 has second connection points 202 on both sides, and the two drive chains 33 together serve as the output ends of the lifting drive component 30, respectively connected to the two second connection points 202. The position detection component 40 is used to detect the rotation angle of the drive shaft 31 and / or the driven shaft 32.

[0028] Here, the drive shaft 31 can be a motor or other rotary drive as the power source. The drive chain 33 rotates under the drive of the drive shaft 31 by meshing with the drive chain 33 wheel and the driven sprocket. Thus, the second connection point 202 can be set on the first half or the second half of the drive chain 33 located between the drive chain 33 wheel and the driven sprocket to connect with the hopper 20. Considering the connection stability of the hopper 20, the vertical section of the drive chain 33 that is farther away from the guide groove 100 can be selected to connect with the hopper 20.

[0029] Based on this, the position detection component 40 detects the rotation angle of either the drive shaft 31 or the driven shaft 32, or both rotation angles, thereby obtaining the movement distance of the second connection point 202 located on the drive chain 33, and thus obtaining the height position of the second connection point 202. This method has higher position detection accuracy compared to using proximity sensors or distance sensors to detect the position.

[0030] As an optional implementation of the position detection component 40 described above, please refer to Figure 3 The position detection component 40 includes a fixed base 41, a toothed disc 42, and a counting sensor 43. The fixed base 41 is wrapped around the outer periphery of the drive shaft 31 and is fixedly connected to the lifting frame 10. The toothed disc 42 is fixedly sleeved on one end of the drive shaft 31, and the edge of the toothed disc 42 forms a ring of sensing teeth 421. The counting sensor 43 is located on the fixed base 41 and the sensing end faces the edge of the toothed disc 42. The toothed disc 42 rotates with the drive shaft 31, and a counting signal is triggered once when each sensing tooth 421 passes the counting sensor 43.

[0031] The sensing teeth 421 around the edge of the gear disk 42 are evenly distributed in a circle. Therefore, the rotation angle of the gear disk 42 is fixed when the counting sensor 43 triggers a counting signal once. For example, if the number of sensing teeth 421 is n and the cumulative count of the counting sensor 43 is m, then the rotation angle of the gear disk 42 is (360 / n×m)°. Furthermore, if the rotation angle of the gear disk 42 corresponding to the first set value is A and the rotation angle of the gear disk 42 corresponding to the second set value is B, then when m=A×n / 360, the lifting drive 30 decelerates, and when m=B×n / 360, the lifting drive 30 stops.

[0032] For some possible implementations, please refer to [link / reference]. Figure 4 and Figure 5 The hopper 20 includes a hopper body 21 and a guide channel 22; the front end of the hopper body 21 has an upwardly inclined discharge channel 212, the side wall of the discharge channel 212 is provided with a first connection point 201 and a second connection point 202, and the front port of the discharge channel 212 is provided with an adjusting baffle 213; the guide channel 22 is connected to the front port of the discharge channel 212.

[0033] The hopper 21, as the main body for containing materials, is in a horizontal state during normal lifting and lowering. During the flipping process, the hopper 21 gradually tilts, while the discharge channel 212 first tends to be horizontal and then tilts downward. This allows the discharge channel 212 to buffer the materials in the early stages of the flipping process, and after the final flip, the materials enter the guide trough 22 from the discharge channel 212 and slide down into the frying equipment under the guidance of the guide trough 22. Throughout the process, the materials undergo two buffering processes through the discharge channel 212 and the guide trough 22, thereby reducing the impact of the materials on the frying oil and mitigating the problem of oil splattering.

[0034] Based on the above, the adjusting baffle 213 can change the opening of the discharge channel 212, thereby regulating the discharge flow rate and preventing oil splattering caused by material slugging and falling, further ensuring the safe and stable feeding of the frying equipment. In addition, by setting the adjusting baffle 213, the opening of the discharge channel 212 can also be adjusted according to different material unit sizes, thereby meeting the feeding needs of different materials.

[0035] Specifically, such as Figure 4 As shown, the adjusting baffle 213 has a first elongated hole 2131 at both ends of its edge. The first elongated hole 2131 extends along the height direction of the discharge channel 212. The adjusting baffle 213 is connected to the discharge channel 212 by fasteners passing through the first elongated hole 2131.

[0036] Loosen the fasteners and slide the baffle 213 along the first elongated hole 2131 to adjust the flow rate of material discharged from the discharge channel 212. After adjusting, re-tighten the fasteners. The operation is simple and convenient.

[0037] In some embodiments, please refer to Figure 4 and Figure 5 The side wall of the guide channel 22 is provided with at least one second elongated hole 221 extending along the discharge direction of the discharge channel 212. The guide channel 22 is fixed to the side wall of the discharge channel 212 by fasteners passing through the second elongated hole 221.

[0038] The guide channel 22 is fixed by fasteners passing through the second elongated hole 221. After the fasteners are loosened, the guide channel 22 can slide along the second elongated hole 221, thereby adjusting the length of the guide channel 22 relative to the discharge channel 212. Thus, the guide channel 22 can be adjusted to a height close to the surface of the frying oil for different frying equipment, so that the material slides smoothly into the frying oil along the guide channel 22, reducing the impact of the material on the frying oil and thus alleviating the phenomenon of frying oil splashing.

[0039] It should be noted that, as Figure 5 As shown, in this embodiment, a cover plate 214 is provided at the top of the hopper 21 near the discharge channel 212. One end of the cover plate 214 is connected to the top surface of the discharge channel 212, and the other end forms a feed inlet 215 between it and the rear end wall of the hopper 21. By providing the cover plate 214, the material can be smoothly introduced into the discharge channel 212 during the hopper 21's rotation, and the material can be prevented from scattering from the hopper 21 while entering the discharge channel 212, thereby improving the stability of the feeding process.

[0040] As a variant structural form of the aforementioned bucket body 21, please refer to Figure 4 and Figure 5The rear end of the bucket body 21 is open and slidably connected to a telescopic bucket 216. The side wall of the telescopic bucket 216 is provided with a third elongated hole 2161. The telescopic bucket 216 is fixed to the side wall of the bucket body 21 by fasteners passing through the third elongated hole 2161.

[0041] Considering the environmental factors around the frying equipment, the position of the telescopic bucket 216 can be adjusted by loosening the fasteners through the third elongated hole 2161, thereby extending or shortening the total length of the telescopic bucket 216 and the bucket body 21. Specifically, after extension, the material capacity increases, which helps to improve feeding efficiency, while after shortening, the space occupied is reduced (not only is the horizontal space occupied reduced, but the overall height is also reduced when flipping, so the demand for vertical space is also smaller), which can meet the feeding operation in the case of a small working space.

[0042] For example, such as Figure 5 As shown, in this embodiment, the width of the guide channel 22 gradually narrows from one end near the discharge channel 212 to the other. After the material enters the guide channel 22, it can gradually gather together and enter the frying oil. Compared with the method of the material falling into the frying oil in a dispersed manner, it is more conducive to alleviating the problem of oil splashing caused by impacting the surface of the frying oil.

[0043] To improve the stability of the hopper 20's movement, in this embodiment, the lifting frame 10 is provided with two guide grooves 100 with opposing openings. Both sides of the hopper 20 have first connection points 201 for connecting guide wheels 211, and the first connection points 201 are higher than the second connection points 202. The two guide wheels 211 roll on one of the guide grooves 100 respectively. Both sides of the hopper 20 are constrained by the guide grooves 100 on the guide wheels 211, thereby ensuring the stability of the hopper 20's movement and preventing the hopper 20 from shaking, which could lead to increased material slippage and oil splashing, thus improving the safety and stability of the frying equipment's feeding process.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bucket elevator, characterized in that, include: A lifting frame for fixing to the ground, the lifting frame is provided with a guide groove, the guide groove having a lifting guide section and a tilting guide section, the lifting guide section extending vertically on the lifting frame, and the tilting guide section extending curvedly towards the front of the lifting frame from the top of the lifting guide section; The hopper has a first connection point and a second connection point that are spaced apart front to back and staggered vertically. The first connection point is provided with a guide wheel for rolling in the guide groove. The front end of the hopper has an extended guide groove. A lifting drive component is provided on the lifting frame, and its output end is used to connect to the second connection point; A position detection component is provided on the lifting frame and is used to detect the position of the output end of the lifting drive component; The lifting drive is used to decelerate when it moves upward at its output end and reaches a first set value, and to stop when it reaches a second set value.

2. The bucket elevator as described in claim 1, characterized in that, The lifting drive component includes: A drive shaft and a driven shaft are rotatably connected to the lower and upper ends of the lifting frame, respectively. Both ends of the drive shaft are fitted with drive sprockets, and both ends of the driven shaft are fitted with driven sprockets. Two drive chains are respectively fitted onto the drive sprocket and the driven sprocket that are aligned vertically; The hopper has two second connection points on both sides, and the two drive chains together serve as the output ends of the lifting drive component, which are respectively connected to the two second connection points. The position detection component is used to detect the rotation angle of the drive shaft and / or the driven shaft.

3. The bucket elevator as described in claim 2, characterized in that, The position detection component includes: A fixed seat is fitted around the outer circumference of the drive shaft and fixedly connected to the lifting frame; A gear disc is fixedly sleeved on one end of the drive shaft, and a ring of sensing teeth is formed on the edge of the gear disc. A counting sensor is mounted on the fixed base with its sensing end facing the edge of the toothed disc; The toothed disc rotates with the drive shaft, and each of the sensing teeth triggers a counting signal when it passes the counting sensor.

4. The bucket elevator as described in claim 1, characterized in that, The hopper includes a hopper body and a guide channel; the front end of the hopper body has an upwardly inclined discharge channel, the side wall of the discharge channel is provided with a first connection point and a second connection point, and the front port of the discharge channel is provided with an adjusting baffle; the guide channel is connected to the front port of the discharge channel.

5. The bucket elevator as described in claim 4, characterized in that, The adjusting baffle is provided with a first elongated hole at both ends of its edge. The first elongated hole extends along the height direction of the discharge channel. The adjusting baffle is connected to the discharge channel by fasteners passing through the first elongated holes.

6. The bucket elevator as described in claim 4, characterized in that, The sidewall of the guide channel is provided with at least one second elongated hole extending along the discharge direction of the discharge channel, and the guide channel is fixed to the sidewall of the discharge channel by fasteners passing through the second elongated hole.

7. The bucket elevator as described in claim 4, characterized in that, The top of the hopper is provided with a cover plate near the discharge channel. One end of the cover plate is connected to the top surface of the discharge channel, and the other end forms a feed inlet between the cover plate and the rear end wall of the hopper.

8. The bucket elevator as described in claim 4, characterized in that, The rear end of the bucket body is open and slidably connected to a telescopic bucket. The side wall of the telescopic bucket is provided with a third elongated hole. The telescopic bucket is fixed to the side wall of the bucket body by fasteners passing through the third elongated hole.

9. The bucket elevator as described in claim 4, characterized in that, The width of the guide channel gradually narrows from one end near the discharge channel to the other end.

10. The bucket elevator as described in any one of claims 1-9, characterized in that, The lifting frame is provided with two guide grooves with opposite openings. Both sides of the hopper have a first connection point for connecting the guide wheel, and the first connection point is higher than the second connection point. The two guide wheels roll on one of the guide grooves respectively.

Images