Agricultural mechanical fertilizing device

By using knock rods to drive the connecting plate to vibrate the fertilization bucket and the bristles of the blocking plate in the agricultural machinery fertilization device, the problem of fertilizer blockage is solved, the fertilizer blockage is improved, the efficiency and practicality of fertilization is improved, and artificial intervention and noise pollution are reduced.

CN222193083UActive Publication Date: 2024-12-20昭苏县种子管理站
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Patent Information

Application Number
CN202420980465.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-08
Publication Date
2024-12-20
Estimated Expiration
2034-05-08

AI Technical Summary

Technical Problem

The existing agricultural machinery fertilization devices are prone to blockage due to different sizes of fertilizer particles during the fertilization process. When the fertilization speed is too fast, manual clearance is required, resulting in cumbersome operation and excessive manual intervention.

Method used

By knocking the rod, the reciprocating hammer of the opposite plate of the connecting plate is driven to shake the fertilization bucket on the side of the vertical plate, so that the fertilizer particles attached to the discharge port are loosened, and the lower surface of the discharge port is cleaned with the bristles of the plugged plate. Prevent blockage.

Benefits of technology

It improves the efficiency and smoothness of fertilization, saves time and labor costs, reduces noise pollution, and extends the service life of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of fertilizing devices, and particularly relates to an agricultural mechanical fertilizing device which comprises a base and a fertilizing component arranged above the base, the fertilizing assembly comprises a U-shaped connecting rod, a first motor, a first shifting gear and a first spring, the U-shaped connecting rod is fixedly connected to the outer side of one end of the base, and the first motor is mounted on the upper surface of one end of the base; the rapping rod drives the connecting plate to hammer the vertical plate in a reciprocating manner, so that the fertilizing bucket on one side of the vertical plate is driven to vibrate, fertilizer particles attached to the position near the discharging opening are loosened, the blocking phenomenon is prevented, the fertilizing process can be smoother, the fertilizing efficiency is improved, and a large amount of time and labor cost can be saved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of fertilizing devices, and in particular relates to an agricultural mechanical fertilizing device. Background Art

[0002] Fertilization refers to the agricultural technical measure of applying fertilizers to the soil or spraying them on plants to provide the nutrients needed by plants and maintain and improve soil fertility. The main purpose of fertilization is to increase crop yields, improve crop quality, improve soil fertility and increase economic benefits. Therefore, reasonable and scientific fertilization is one of the main means to ensure food security and maintain sustainable agricultural development.

[0003] In the process of fertilizing, agricultural machinery first places the fertilizer in the fertilizer bucket, and then controls the switch on the fertilizer bucket to control the fertilization speed. However, the existing fertilizer in the fertilizer bucket may have different particle sizes, which may cause the fertilizer to be blocked at the outlet. In addition, the fertilizer may be blocked together because the fertilization speed is too fast. Sometimes, tapping the fertilizer bucket is enough, but in serious cases, manual unblocking is required, which leads to too much manual intervention in the fertilization process and cumbersome operation.

[0004] Therefore, a kind of agricultural machinery fertilization device is designed to solve the above-mentioned problems. Utility Model Content

[0005] To solve the problems raised in the above background technology. The utility model provides an agricultural mechanical fertilization device, which drives the connecting plate to hammer the vertical plate reciprocatingly through the knocking rod, thereby driving the fertilizer bucket on one side of the vertical plate to vibrate, so that the fertilizer particles attached to the vicinity of the discharge port are loosened, thereby preventing the occurrence of blockage, and making the fertilization process smoother, thereby improving the efficiency of fertilization, saving a lot of time and labor costs, and the outer side of the end of the blocking plate is fixedly connected with bristles, so that the bristles at the end of the blocking plate can clean the lower surface of the discharge port every time the blocking plate moves, further preventing the discharge port from being blocked, and increasing the practicality of the device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an agricultural mechanical fertilizing device, comprising a base, and also comprising a fertilizing assembly arranged above the base;

[0007] The fertilization assembly includes a U-shaped connecting rod, a first motor, a first toggle gear and a first spring, the outer side of one end of the base is fixedly connected to the U-shaped connecting rod, the upper surface of one end of the base is installed with the first motor, the outer side of the main shaft of the first motor is fixedly connected to the first toggle gear, the inner side of one end of the U-shaped connecting rod is slidably connected to a knocking rod, the surface of the knocking rod is provided with a tooth groove, the outer side of one end of the knocking rod is fixedly connected to a connecting plate, the two ends of the first spring are respectively fixedly connected to the outer side of the end of the connecting plate and the outer side of one end of the U-shaped connecting rod, the outer side of one end of the base is fixedly connected to a vertical plate, and the outer side of one end of the connecting plate is aligned with the outer side of the end of the vertical plate Contact, two fertilizer buckets are fixedly connected to the outer side of one end of the vertical plate, a connecting column is fixedly connected to the outer side of one end of the fertilizer bucket, a discharge port is fixedly connected to the outer side of the other end of the fertilizer bucket, a fertilizer plate is fixedly connected to the outer side of the end of the fertilizer bucket, and two second motors are installed on the lower surface of the fertilizer plate, a second toggle gear is fixedly connected to the outer side of the main shaft of the second motor, a blocking rod is slidably connected to the inner side of the end of the fertilizer plate, a plurality of gear rings are fixedly connected to the surface of the blocking rod, the outer side of the end of the second toggle gear is meshed with the gear ring, the outer side of the end of the blocking rod is fixedly connected to a blocking plate, and the blocking plate is in contact with the lower surface of the discharge port.

[0008] As a preferred embodiment of the agricultural mechanical fertilizing device of the utility model, a rubber pad is fixedly connected to the outer side of one end of the connecting plate, and the material of the rubber pad is rubber.

[0009] As a preferred agricultural mechanical fertilizing device of the utility model, a plurality of balls are rotatably connected to the inner ring of the end of the fertilizing plate, and the outer surface of the balls is in contact with the outer side of the blocking rod.

[0010] As a preferred embodiment of the agricultural mechanical fertilizing device of the utility model, bristles are fixedly connected to the outer side of the end of the blocking plate.

[0011] As a preferred agricultural mechanical fertilizing device of the utility model, the outer surface of the discharge port is rotatably connected with a material control cover.

[0012] Compared with the prior art, the beneficial effects of the utility model are: a fertilization component is added to the present application, and the knocking rod drives the connecting plate to hammer the vertical plate back and forth, thereby driving the fertilization bucket on one side of the vertical plate to vibrate, so that the fertilizer particles attached to the vicinity of the discharge port are loosened, thereby preventing the occurrence of blockage, and making the fertilization process smoother, thereby improving the efficiency of fertilization, and saving a lot of time and labor costs. A brush is fixedly connected to the outer side of the end of the blocking plate, so that the bristles at the end of the blocking plate can clean the lower surface of the discharge port each time the blocking plate moves, further preventing the discharge port from being blocked, and increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the U-shaped connecting rod and the first motor in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the blocking rod and the blocking plate in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the first shifting gear and the knocking rod in the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the material outlet and the material control cover in the utility model;

[0019] Figure 6 It is a structural schematic diagram of the fertilizer plate and the ball in the utility model;

[0020] In the figure:

[0021] 1. Base;

[0022] 2. Fertilizer assembly; 21. U-shaped connecting rod; 22. First motor; 23. First toggle gear; 24. Knocking rod; 25. Tooth groove; 26. Connecting plate; 27. First spring; 28. Vertical plate; 29. ​​Fertilizer bucket; 210. Connecting column; 211. Discharge port; 212. Fertilizer plate; 213. Second motor; 214. Second toggle gear; 215. Blocking rod; 216. Gear ring; 217. Blocking plate; 218. Rubber pad; 219. Ball; 220. Brush; 221. Control cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown;

[0025] An agricultural mechanical fertilizing device comprises a base 1.

[0026] In this embodiment: during the fertilization process, the agricultural machinery first places the fertilizer in the fertilizer bucket 29, and then controls the switch on the fertilizer bucket 29 to control the fertilization speed. However, the existing fertilizer in the fertilizer bucket 29 may have different particle sizes, which may cause the fertilizer to be blocked at the outlet, and the fertilizer may be blocked together because the fertilization speed is too fast. Sometimes, tapping the fertilizer bucket 29 is enough, but in serious cases, manual unblocking is required, which leads to excessive manual intervention in the fertilization process and cumbersome operations. In order to solve this technical problem, a fertilization component 2 is added on this basis.

[0027] More specifically:

[0028] like Figures 1 to 6 As shown:

[0029] In combination with the above content: the fertilization component 2 includes a U-shaped connecting rod 21, a first motor 22, a first toggle gear 23 and a first spring 27. The outer side of one end of the base 1 is fixedly connected to the U-shaped connecting rod 21, the upper surface of one end of the base 1 is installed with the first motor 22, the outer side of the main shaft of the first motor 22 is fixedly connected to the first toggle gear 23, the inner side of one end of the U-shaped connecting rod 21 is slidably connected to the knock rod 24, the surface of the knock rod 24 is provided with a tooth groove 25, the outer side of one end of the knock rod 24 is fixedly connected to a connecting plate 26, the two ends of the first spring 27 are respectively fixedly connected to the outer side of the end of the connecting plate 26 and the outer side of one end of the U-shaped connecting rod 21, the outer side of one end of the base 1 is fixedly connected to a vertical plate 28, the outer side of one end of the connecting plate 26 contacts the outer side of the end of the vertical plate 28, and the vertical plate Two fertilizer buckets 29 are fixedly connected to the outer side of one end of 28, a connecting column 210 is fixedly connected to the outer side of one end of the fertilizer bucket 29, a discharge port 211 is fixedly connected to the outer side of the other end of the fertilizer bucket 29, a fertilizer plate 212 is fixedly connected to the outer side of the end of the fertilizer bucket 29, and two second motors 213 are installed on the lower surface of the fertilizer plate 212, a second shifting gear 214 is fixedly connected to the outer side of the main shaft of the second motor 213, a blocking rod 215 is slidably connected to the inner side of the end of the fertilizer plate 212, a plurality of gear rings 216 are fixedly connected to the surface of the blocking rod 215, the outer side of the end of the second shifting gear 214 is meshed with the gear ring 216, and a blocking plate 217 is fixedly connected to the outer side of the end of the blocking rod 215, and the blocking plate 217 contacts the lower surface of the discharge port 211.

[0030] In this embodiment: in the agricultural machinery fertilizing device, the U-shaped connecting rod 21 is a U-shaped structure, and a knock rod 24 is slidably connected to the inside of the through hole opened at the end of the U-shaped connecting rod 21. The outer side of the first toggle gear 23 has only four teeth, and the purpose is to drive the knock rod 24 meshing and connected with the first toggle gear 23 through the tooth groove 25 to make reciprocating motion. When the first toggle gear 23 rotates, the first toggle gear 23 will mesh and connect with the knock rod 24, driving the knock rod 24 to move horizontally, and at the same time compressing the first spring 27 and storing elastic potential energy. When the first toggle gear 23 is disengaged from the tooth groove 25 opened by the knock rod 24, the first spring 27 releases the elastic potential energy, driving the knock rod 24 to rebound quickly inside the U-shaped connecting rod 21, thereby bringing The connecting plate 26 on the outside of one end of the movable knocking rod 24 knocks the vertical plate 28 fixedly connected to the outer side of the end of the base 1. A circular limiting plate is arranged on the outside of the other end of the knocking rod 24 to limit the position of the knocking rod 24. Two fertilizer buckets 29 are fixedly connected to the outer side of one end of the vertical plate 28. A connecting column 210 is fixed between the two fertilizer buckets 29 to ensure the stability of the fertilizer buckets 29. When the user needs to use the fertilizing device, the user can add fertilizer into the fertilizer bucket 29 and then start the two second motors 213, thereby driving the second toggle gears 214 at the ends of the two second motors 213 to rotate synchronously. The second toggle gear 214 has only four teeth on the outside, and the second toggle gear 214 and the blocking rod 215 are in contact with each other. When the second toggle gear 214 drives the blocking rod 215 to move to the extreme position at one end, one of the second toggle gears 214 is disengaged from the gear ring 216, and at this time, the other second toggle gear 214 is meshed and linked with the gear ring 216, and drives the blocking rod 215 to move in the opposite direction, thereby driving the blocking rod 215 to slide back and forth on the inner side of the end of the fertilizing plate 212, and the blocking plate 217 at the end of the blocking rod 215 is close to the lower surface of the discharge port 211 to block the discharge port 211. When a blocking plate 217 moves to the extreme position at one end, one discharge port 211 will be exposed to the outside, and then the fertilizer will flow out through the discharge port 211. When this blocking plate 217 moves to the extreme position at one end, When the other end is in the extreme position, the other discharge port 211 will be exposed to the outside, so that the fertilizer in the other ball 219 will flow out, and the fertilizer in the two fertilizer buckets 29 can be realized to flow out. Two pushing handles are arranged on the outer side of the end of the base 1, and rolling wheels are installed on the outer sides of the two ends of the base 1. The user can push the handles and rolling wheels to move the fertilization device, and the knocking rod 24 drives the connecting plate 26 to reciprocate and hammer the vertical plate 28, thereby driving the fertilizer bucket 29 on one side of the vertical plate 28 to vibrate, so that the fertilizer particles attached to the discharge port 211 are loosened, thereby preventing the occurrence of blockage, and making the fertilization process smoother, thereby improving the efficiency of fertilization and saving a lot of time and labor costs.

[0031] Going further:

[0032] In an optional embodiment, a rubber pad 218 is fixedly connected to the outer side of one end of the connecting plate 26 , and the material of the rubber pad 218 is rubber.

[0033] In this embodiment: a rubber pad 218 is fixedly connected to the outer side of one end of the connecting plate 26, and the outer side of one end of the rubber pad 218 is in contact with one side of the vertical plate 28. The rubber pad 218 is made of rubber and can play a buffering role between the beating mechanism and the fertilizer bucket 29, reducing direct impact damage and extending its service life. The rubber pad 218 will produce a certain elastic deformation when impacted, and can absorb part of the impact energy, thereby reducing the generation of noise. This is of positive significance for improving the working environment of the fertilization device and reducing noise pollution.

[0034] Going further:

[0035] In an optional embodiment, a plurality of balls 219 are rotatably connected to the inner side of the end of the fertilizing plate 212 , and the outer surface of the balls 219 is in contact with the outer side of the blocking rod 215 .

[0036] In the present embodiment: a plurality of balls 219 are connected to the inner side of the end of the fertilizing plate 212 in a circular rotation, and the balls 219 are in contact with the outer surface of the blocking rod 215. The balls 219 can significantly reduce the friction between the blocking rod 215 and the inner side of the end of the fertilizing plate 212. Since the balls 219 are round and can roll freely at the connection, the friction of the blocking rod 215 during reciprocating motion is converted into rolling friction, which greatly reduces the frictional resistance and makes its movement smoother.

[0037] Going further:

[0038] In an optional embodiment, bristles 220 are fixedly connected to the outer side of the end of the blocking plate 217 .

[0039] In the present embodiment: a brush 220 is fixedly connected to the outer side of the end of the blocking plate 217, and the bristles 220 are made of flexible material, so that each time the blocking plate 217 moves, the bristles 220 at the end of the blocking plate 217 can clean the lower surface of the discharge port 211, further preventing the discharge port 211 from being blocked, thereby increasing the practicality of the device.

[0040] Going further:

[0041] In an optional embodiment, the outer surface of the discharge port 211 is rotatably connected to a material control cover 221 .

[0042] In this embodiment: the outer side of the end of the discharge port 211 is rotatably connected with a material control cover 221, and fan-shaped through holes are provided on the outer sides of the ends of the discharge port 211 and the material control cover 221. The connecting gap between the discharge port 211 and the fan-shaped through holes of the material control cover 221 can be adjusted by rotating the material control cover 221, and corresponding adjustments can be made for fertilizers of different particle sizes, thereby further preventing fertilizer blockage and improving the flexibility of the device.

[0043] Working principle: In the agricultural machinery fertilizing device, the U-shaped connecting rod 21 is a U-shaped structure, and a knock rod 24 is slidably connected to the inside of the through hole provided at the end of the U-shaped connecting rod 21. The outer side of the first toggle gear 23 has only four teeth, and the purpose is to drive the knock rod 24 meshing with the first toggle gear 23 through the tooth groove 25 to make reciprocating motion. When the first toggle gear 23 rotates, the first toggle gear 23 will mesh with the knock rod 24, driving the knock rod 24 to move horizontally, while compressing the first spring 27 and storing elastic potential energy. When the first toggle gear 23 is disengaged from the tooth groove 25 provided on the knock rod 24, the first spring 27 releases the elastic potential energy, driving the knock rod 24 to rebound quickly inside the U-shaped connecting rod 21, and then driving the connecting plate 26 on the outer side of one end of the knock rod 24 to The vertical plate 28 fixedly connected to the outer side of the end of the base 1 is knocked, and a circular limit plate is arranged on the outer side of the other end of the knocking rod 24 to limit the position of the knocking rod 24. Two fertilizer buckets 29 are fixedly connected to the outer side of one end of the vertical plate 28, and a connecting column 210 is fixed between the two fertilizer buckets 29 to ensure the stability of the fertilizer bucket 29. When the user needs to use the fertilizing device, the user can add fertilizer into the fertilizer bucket 29, and then start the two second motors 213, thereby driving the second toggle gears 214 at the ends of the two second motors 213 to rotate synchronously. The second toggle gear 214 has only four teeth on the outer side, and the second toggle gear 214 is meshed and linked with the toothed ring 216 on the surface of the blocking rod 215. When the second toggle gear 214 drives the blocking rod 215 When the material block 217 moves to the limit position at one end, one of the second toggle gears 214 is disengaged from the gear ring 216, and the other second toggle gear 214 is meshed and linked with the gear ring 216, and drives the blocking rod 215 to move in the opposite direction, thereby driving the blocking rod 215 to slide back and forth on the inner side of the end of the fertilizer plate 212, and the blocking plate 217 at the end of the blocking rod 215 is close to the lower surface of the discharge port 211 to block the discharge port 211. When one blocking plate 217 moves to the limit position at one end, one discharge port 211 is exposed to the outside, and the fertilizer flows out through the discharge port 211. When the blocking plate 217 moves to the limit position at the other end, the other discharge port 211 is exposed to the outside, thereby causing the fertilizer inside the other ball 219 to flow out. The fertilizer in the two fertilizer buckets 29 can flow out, and two pushing handles are arranged on the outer side of the end of the base 1. Rolling wheels are installed on the outer side of the two ends of the base 1. The user can push the handles and the rolling wheels to move the fertilizing device. The knocking rod 24 drives the connecting plate 26 to hammer the vertical plate 28 back and forth, thereby driving the fertilizing bucket 29 on one side of the vertical plate 28 to vibrate, so that the fertilizer particles attached to the vicinity of the discharge port 211 are loosened, thereby preventing the occurrence of blockage, and making the fertilization process smoother, thereby improving the efficiency of fertilization, and saving a lot of time and labor costs. A rubber pad 218 is fixedly connected to the outer side of one end of the connecting plate 26, and the outer side of one end of the rubber pad 218 contacts one side of the vertical plate 28. The material of the rubber pad 218 is rubber.It can play a buffering role between the beating mechanism and the fertilizer bucket 29, reduce direct impact damage, and extend its service life. The rubber pad 218 will produce a certain elastic deformation when impacted, which can absorb part of the impact energy, thereby reducing the generation of noise. This is of positive significance for improving the working environment of the fertilization device and reducing noise pollution. A plurality of balls 219 are connected to the inner side of the end of the fertilization plate 212 in an annular rotation. The balls 219 are in contact with the outer surface of the blocking rod 215. The friction between the blocking rod 215 and the inner side of the end of the fertilization plate 212 can be significantly reduced through the balls 219. The ball 219 is round and can roll freely at the connection, which makes the friction of the blocking rod 215 during reciprocating motion into rolling friction, greatly reducing the friction resistance, and making its movement smoother. The outer side of the end of the discharge port 211 is rotatably connected with a control cover 221. The outer sides of the ends of the discharge port 211 and the control cover 221 are both provided with fan-shaped through holes. By rotating the control cover 221, the communication gap between the discharge port 211 and the fan-shaped through holes of the control cover 221 can be adjusted. The corresponding adjustment can be made for fertilizers of different particle sizes, further preventing fertilizer blockage and improving the flexibility of the device.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An agricultural mechanical fertilizing device, comprising a base (1), characterized in that: It also includes a fertilization assembly (2) arranged above the base (1); The fertilizing assembly (2) comprises a U-shaped connecting rod (21), a first motor (22), a first toggle gear (23) and a first spring (27); the outer side of one end of the base (1) is fixedly connected to the U-shaped connecting rod (21); the upper surface of one end of the base (1) is mounted with the first motor (22); the outer side of the main shaft of the first motor (22) is fixedly connected to the first toggle gear (23); the inner side of one end of the U-shaped connecting rod (21) is slidably connected to a knocking rod (24); a tooth groove (25) is provided on the surface of the knocking rod (24); the outer side of one end of the knocking rod (24) is fixedly connected to a connecting plate (26); the two ends of the first spring (27) are respectively fixedly connected to the outer side of the end of the connecting plate (26) and the outer side of one end of the U-shaped connecting rod (21); the outer side of one end of the base (1) is fixedly connected to a vertical plate (28); the outer side of one end of the connecting plate (26) contacts the outer side of the end of the vertical plate (28); the vertical plate (28) is fixedly connected to the outer side ... Two fertilizer buckets (29) are fixedly connected to the outer side of one end of the plate (28), a connecting column (210) is fixedly connected to the outer side of one end of the fertilizer bucket (29), a discharge port (211) is fixedly connected to the outer side of the other end of the fertilizer bucket (29), a fertilizer plate (212) is fixedly connected to the outer side of the end of the fertilizer bucket (29), two second motors (213) are installed on the lower surface of the fertilizer plate (212), and the outer side of the main shaft of the second motor (213) is fixedly connected to A second shifting gear (214), the inner side of the end of the fertilizer plate (212) is slidably connected to a blocking rod (215), the surface of the blocking rod (215) is fixedly connected to a plurality of toothed rings (216), the outer side of the end of the second shifting gear (214) is meshingly connected to the toothed rings (216), the outer side of the end of the blocking rod (215) is fixedly connected to a blocking plate (217), and the blocking plate (217) is in contact with the lower surface of the discharge port (211).

2. The agricultural mechanical fertilization device according to claim 1, characterized in that: A rubber pad (218) is fixedly connected to the outer side of one end of the connecting plate (26), and the material of the rubber pad (218) is rubber.

3. The agricultural mechanical fertilization device according to claim 1, characterized in that: A plurality of balls (219) are rotatably connected to the inner side of the end of the fertilizer application plate (212), and the outer surface of the balls (219) is in contact with the outer side of the material blocking rod (215).

4. The agricultural mechanical fertilization device according to claim 1, characterized in that: Brush bristles (220) are fixedly connected to the outer side of the end of the blocking plate (217).

5. The agricultural mechanical fertilization device according to claim 1, characterized in that: The outer surface of the material outlet (211) is rotatably connected to a material control cover (221).