CN117538413A - Detection device for grain loss - Google Patents

Abstract

The invention discloses a detection device for grain loss, which comprises a mounting frame; the material throwing assembly comprises an inner material tray, an outer material tray and a first driver in driving connection with the inner material tray; the outer material tray is fixedly arranged on the mounting frame, the inner material tray is rotatably arranged in the outer material tray, the side wall of the outer material tray is communicated with a first discharge hole, the inner material tray is hollow to form a containing cavity for containing grains, and the side wall of the inner material tray is communicated with a second discharge hole communicated with the containing cavity; the detection assembly comprises a vibration frame, a movable frame, a detector and a plurality of elastic pieces; the movable frame is arranged on the mounting frame, one ends of the elastic pieces are connected with the vibration frame, the other ends of the elastic pieces are connected with the movable frame, and the detector is arranged at the top of the vibration frame. When the inner charging tray rotates to the second discharging port along the circumferential direction and is correspondingly communicated with the first discharging port, so that grains are thrown out, and when the thrown grains collide with the detector, the detector performs calculation according to the vibration amplitude of the vibration frame, and the real operation environment of the combine harvester is effectively simulated.

Description

Detection device for grain loss

Technical field

The present invention relates to the technical field of detecting grain grains, and in particular, to a detection device for grain loss.

Background technique

Combine harvesters are used to harvest grains, providing great convenience. During the operation of the combine harvester, the loss of some grain grains will inevitably occur; therefore, the loss of grain grains is an important indicator for measuring the operating performance of the combine harvester. At present, research often uses loss detection sensors based on the piezoelectric effect to monitor and record the impact signals of lost grains in real time.

In some related technologies, most of the detector performance calibration test benches for grain loss use a conveyor belt as the core. The grains or debris are placed on the conveyor belt, and the sensor is placed under the conveyor belt, so that the grain debris falls to the ground at a certain speed. On the loss detection sensor, however, this solution has certain limitations: the grain grains are relatively concentrated at the sensor impact point and are not arbitrary. Therefore, it is difficult to accurately simulate the real operating environment of the combine harvester and cannot reflect the real detection environment.

Contents of the invention

In order to overcome the shortcomings of the existing technical solutions, embodiments of the present invention provide a device for detecting grain loss.

The technical solutions adopted by the present invention to solve the technical problems are:

A detection device for grain loss, the detection device includes:

Mount;

Material rejection assembly, the material rejection assembly includes an inner material tray, an outer material tray and a first driver drivingly connected to the inner material tray; the outer material tray is fixedly installed on the mounting frame, and the inner material tray Rotation is provided in the outer material tray, the side wall of the outer material tray is penetrated by a first outlet, and the inner material tray is hollow to form a receiving cavity for accommodating grain grains. The side wall has a second discharge port connected with the accommodation cavity; when the first driver drives the inner material plate to rotate in the circumferential direction to the second discharge port and the first discharge port When the correspondence is connected, the grain grains are thrown out;

Detection component, the detection component includes a vibrating frame, a movable frame, a detector and a plurality of elastic parts; the movable frame is arranged on the mounting frame, one end of the plurality of elastic parts is connected to the vibrating frame, and the other One end is connected to the movable frame, and the detector is arranged on the top of the vibrating frame for detecting the loss of grains after being thrown out.

As a preferred technical solution of the present invention, the material rejection assembly further includes an adjustment part movably arranged in the first discharge port; when the adjustment part is along the length of the first discharge port When moving, the outer diameter of the first discharge port is increased or reduced.

As a preferred technical solution of the present invention, the inner material tray has a feeding portion connected with the accommodation cavity.

As a preferred technical solution of the present invention, the detection assembly further includes a rotating plate and a second driver; the detector is arranged on the rotating plate, and one side of the rotating plate rotates with the top of the vibration frame connection, the second driver is drivingly connected to the rotating plate; when the second driver drives the rotating plate to rotate, the orientation of the detector is adjusted.

As a preferred technical solution of the present invention, the second driver includes a push rod, a first motor, a first moving part and a first screw; the first moving part is threadedly connected to the first screw, so One end of the push rod is rotatably connected to the first moving part, the other end of the push rod is rotatably connected to the rotating plate, and the output shaft of the first motor is connected to one end of the first screw rod; When the first motor drives the first screw to rotate in the circumferential direction, the first moving part moves along the axial direction of the first screw, so that the push rod drives the rotating plate to rotate.

As a preferred technical solution of the present invention, the movable frame includes a bottom plate and a plurality of connecting columns arranged on the top of the bottom plate;

There are multiple elastic members. The two ends of at least one elastic member are connected to the bottom plate and the bottom of the vibrating frame respectively. The same ends of the other elastic members are connected to the vibrating frame, and the other end of the elastic member is connected to the vibrating frame. Connect each of the connecting posts separately.

As a preferred technical solution of the present invention, it also includes a third driver, which is drivingly connected to the movable frame and used to drive the movable frame to move.

As a preferred technical solution of the present invention, the third driver includes a second motor, a second screw rod and a second moving part; the movable frame is provided on the second moving part, and the second moving part Threadedly connected to the second screw, the output shaft of the second motor is drivingly connected to one end of the second screw; when the second motor drives the second screw to rotate, the second movement The first screw moves along the axial direction of the second screw rod to drive the movable frame to move.

As a preferred technical solution of the present invention, there are two second drivers, and the second screw rod of the former second driver is arranged vertically with the second screw rod of the latter second driver.

As a preferred technical solution of the present invention, it also includes at least two clamping assemblies for clamping the outer material tray.

Compared with the prior art, the beneficial effects of the present invention are:

The first driver drives the inner material disk to rotate in the circumferential direction. When the inner material disk rotates, it reaches a certain speed so that a large amount of grains shake rapidly in the containing cavity. When the inner material disk rotates to the second outlet and the first When the outlet is connected, the grains are thrown out. When the thrown grains collide with the detector, the entire vibrating frame vibrates in a small and irregular manner. The detector responds to the vibration of the vibrating frame. Amplitude calculation is performed to obtain the loss of grain grains; this setting can effectively simulate the real operating environment of the combine harvester and improve the accuracy of simulating the loss of grain grains caused by the operation of the combine harvester.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention, which are of great significance to this field. Ordinary technicians can also obtain other drawings based on these drawings without exerting creative work.

Figure 1 is an overall structural diagram of an embodiment of the present invention.

Figure 2 is an exploded view of the structure of the material rejection assembly according to the embodiment of the present invention.

Figure 3 is a structural diagram of a detection component according to an embodiment of the present invention.

Figure 4 is a structural diagram of the third driver according to the embodiment of the present invention.

Numbers in the picture

1. Installation rack;

2. Material rejection component; 21. Inner material tray; 211. Second discharge port; 212. Feeding part; 22. External material tray; 221. First discharge port; 23. First driver; 24. Adjustment part ;

3. Detection component; 31. Vibrating frame; 32. Movable frame; 321. Connecting column; 322. Base plate; 33. Detector; 34. Elastic member; 35. Rotating plate; 351. Hinge; 36. Second driver; 361. Push rod; 362. First motor; 363. First moving part; 364. First screw rod;

4. The third driver; 41. The second motor; 42a. The second screw a; 42b. The second screw b; 43. The second moving part;

5. Clamping components.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clear, this application will be further described in detail below in conjunction with the accompanying drawings and embodiments.

It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element.

When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the terms "length", "width", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top" The orientations or positional relationships indicated by , "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply what is meant. Devices or elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limiting.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features.

In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In order to solve the problem of using a conveyor belt to transport grains in the prior art, when the grain grains are relatively concentrated on the collision surface of the collision detector 33, they are not arbitrary. Therefore, it is difficult for this type of detector 33 to accurately simulate the real operating environment of the combine harvester. , technical problems that cannot reflect the real detection environment.

The specific structure of a detection device for grain loss provided by the embodiment of the present invention will be described in detail below. As shown in Figures 1-4, the specific structure of the detection device includes a mounting frame 1, a material rejection component 2 and a detection component 3 .

The mounting bracket 1 is used to support the material rejection component 2 and the detection component 3, thereby preventing the material rejection component 2 and the detection component 3 from being separated during operation.

As shown in Figure 2, in order to be able to simulate the situation in which the grain grains inside the combine harvester fall when it is operating, so as to detect the loss value of the grain grains; for this reason, the material rejection assembly 2 includes an inner material tray 21, The outer material tray 22 and the first driver 23 are drivingly connected to the inner material tray 21; the outer material tray 22 is fixedly installed on the mounting bracket 1, and the inner material tray 21 is rotatably installed in the outer material tray 22. The side walls of the outer material tray 22 There is a first discharge port 221 penetrating through the top, the inner material tray 21 is hollow to form an accommodation cavity for accommodating grain grains, and the side wall of the inner material tray 21 has a second discharge opening 211 communicating with the accommodation cavity; when the third A driver 23 drives the inner material tray 21 to rotate in the circumferential direction until the second discharge port 211 and the first discharge port 221 are connected correspondingly, so that the grains are thrown out.

Specifically, a large amount of grain grains are transported to the accommodation cavity of the inner material tray 21 for temporary storage (if the first discharge port 221 and the second discharge port 211 are staggered, excessively transported grain grains can be prevented from falling into the outside the accommodating cavity), by starting the first driver 23 to drive the inner material tray 21 to rotate along its circumferential direction, and by rotating the inner material tray 21 to a certain speed, a large number of grains can quickly shake in the accommodating cavity, When the inner material tray 21 rotates until the second material outlet 211 and the first material outlet 221 are connected correspondingly, some grains are penetrated through the second material outlet 211 and the first material outlet 221 at the same time and fall outwards. , thereby achieving the effect of throwing out part of the grains, thereby facilitating the detection component 3 to detect the loss of the grains after being thrown out. Compared with the traditional conveyor belt transportation scheme, the authenticity of this scheme is more accurate.

If the inner material tray 21 rotates until the second discharging port 211 is staggered with the first discharging port 221, the grains will continue to shake rapidly in the containing cavity.

It should be noted that since the second discharging port 211 and the first discharging port 221 are both located at the same height, when the inner material tray 21 rotates to a certain range, the second discharging port 211 can be aligned with the first discharging port. The mouth 221 is connected correspondingly, and part of the grain grains can be thrown out at this time.

It should also be noted that an installation cavity is hollowly formed on the outer material tray 22 for assembling the inner material tray 21 in the installation cavity. Specifically, the outer wall of the inner material tray 21 has an interference fit with the cavity wall of the installation cavity. Therefore, when the inner material tray 21 rotates at a high speed in the circumferential direction, the grains cannot pass from the outer side wall of the inner material tray 21 to the cavity of the installation cavity. Falling through the gaps between the walls.

It can be understood that the inner material tray 21 in this embodiment is cylindrical and the installation cavity is a circular cavity; this configuration improves the stability of the inner material tray 21 when rotating at high speed in the installation cavity.

As shown in Figure 3, the detection component 3 includes a vibrating frame 31, a movable frame 32, a detector 33 and a plurality of elastic members 34; the movable frame 32 is provided on the mounting frame 1, and one end of the plurality of elastic members 34 is connected to the vibrating frame 31 The other ends of the plurality of elastic members 34 are connected to the movable frame 32, and the detector 33 is arranged on the top of the vibrating frame 31 for detecting the loss of the grains after being thrown out.

Specifically, since the detector 33 is disposed on the top of the vibrating frame 31 and is located in the falling range where the grains are thrown out, some grains can collide with the detector 33 when they are thrown out. Under the action of the elastic member 34, the entire vibrating frame 31 vibrates, and then the detector 33 is used to detect the loss of grains in the simulation process.

It should be noted that since multiple elastic members 34 are used to support the entire vibrating frame 31, when the thrown grains collide with the detector 33, the entire vibrating frame 31 will vibrate with small amplitude and irregularly, and the whole vibrating frame 31 will vibrate irregularly. That is, the vibrating frame 31 is pushed or pulled by the plurality of elastic members 34 to achieve universal vibration. Then the detector 33 performs calculations based on the vibration amplitude of the vibrating frame 31 to obtain the grain loss.

Specifically, it should be noted that the detector 33 calculates the elastic coefficient (k) of the object according to Hooke's law; for example, if the grain collides with the detector 33, the elastic coefficient of the spring is calculated according to the elastic characteristics of the spring, that is, Hooke's Law formula F = -kx, where F is the restoring force generated by vibration, x is the displacement of the object, and the maximum amplitude is substituted into the formula to obtain k = F/x.

It can be understood that the elastic member in the embodiment of the present invention is a spring.

To sum up the above, the first driver 23 drives the inner material tray 21 to rotate in the circumferential direction. When the inner material tray 21 rotates, it reaches a certain speed so that a large amount of grain grains shake quickly in the containing cavity. When the inner material tray 21 rotates to the first When the second outlet 211 is connected to the first outlet 221, the grains are thrown out. When the grains thrown out collide with the detector 33, the entire vibration frame 31 generates small and irregular vibrations. The detector 33 performs calculations based on the vibration amplitude of the vibrating frame 31 to obtain the loss of grain grains. This setting can effectively simulate the real operating environment of the combine harvester and improve the ability to simulate and obtain the combined harvester during operation. The accuracy of the loss amount of grain grains caused by the embodiment of the present invention is more accurate compared to the traditional conveyor belt solution.

In order to be able to simulate the loss of grain grains of different types of combine harvesters; to this end, as shown in Figure 2, in a specific embodiment, the material rejection assembly 2 also includes an adjustment part 24, and the adjustment part 24 is movably arranged on In the first discharging port 221; when the adjusting part 24 moves along the length of the first discharging port 221, the outer diameter of the first discharging port 221 is increased or reduced. Specifically, by pushing the adjusting part 24 to move in the first discharging port 221, the amount of grains thrown out is adjusted.

For example, when the adjustment part 24 is pushed to move along one end of the first discharge port 221, thereby increasing the outer diameter of the first discharge port 221, at this time, the inner material tray 21 can cause a large amount of grains to be rotated. On the contrary, when the adjusting part 24 is pushed to move along the other end of the first outlet 221, thereby reducing the outer diameter of the first outlet 221, a small amount of grains can be thrown out when the inner tray 21 rotates. out to achieve the purpose of adjusting the amount of grains thrown out.

It can be understood that the first discharge port 221 in the embodiment of the present invention is a guide groove for guiding the movement of the adjusting part 24; there are two adjusting parts 24, that is, when the two adjusting parts 24 move close to each other, To reduce the outer diameter of the first discharging port 221, when the two adjusting parts 24 move away from each other, the outer diameter of the first discharging port 221 is increased.

As shown in FIG. 2 , in a specific embodiment, the inner material tray 21 has a feeding part 212 connected with the accommodating cavity. The tester can transport different amounts into the accommodating cavity through the feeding part 212 . of grains. It can be understood that the feeding part 212 in the embodiment of the present invention is a funnel.

In order to facilitate the adjustment of the orientation of the detector 33, so that different directions of the grain grains can collide with the detector 33; to this end, as shown in Figure 2, in a specific embodiment, the detection assembly 3 also includes a rotating plate 35 and the second driver 36; the detector 33 is arranged on the rotating plate 35, one side of the rotating plate 35 is rotationally connected to the top of the vibration frame 31, the second driver 36 is drivingly connected to the rotating plate 35; when the second driver 36 drives When the rotating plate 35 rotates, the orientation of the detector 33 is adjusted.

Specifically, the detector 33 is disposed on the top side of the rotating plate 35, and the second driver 36 is drivingly connected to the bottom side of the rotating plate 35; when adjusting the orientation of the detector 33, since one side of the rotating plate 35 is in contact with the vibrating frame The top of 31 is rotatably connected, so the rotating plate 35 is pushed by the second driver 36 to tilt the entire rotating plate 35; thus, the rotation of the rotating plate 35 can be adjusted by the second driver 36 according to the different throwing directions of the grains. According to the tilt angle, the second driver 36 can push the rotating plate 35 to rotate at the preset calibration time, thereby reducing excessive operations and improving the simplicity of the overall process.

It should be noted that a hinge 351 is provided on one side of the rotating plate 35 , so one side of the rotating plate 35 is rotationally connected to the top of the vibrating frame 31 through the hinge 351 .

Specifically, in some embodiments, the second driver 36 includes a push rod 361, a first motor 362, a first moving part 363 and a first screw rod 364; the first moving part 363 is threadedly connected to the first screw rod 364 to push One end of the rod 361 is rotationally connected to the first moving part 363, the other end of the push rod 361 is rotationally connected to the rotating plate 35, the output shaft of the first motor 362 is drivingly connected to one end of the first screw rod 364; the first motor 362 drives the third When the screw rod 364 rotates, the first moving part 363 moves along the axial direction of the first screw rod 364, so that the push rod 361 drives the rotating plate 35 to rotate.

Specifically, when the output shaft of the first motor 362 drives the first screw rod 364 to rotate in the circumferential direction, so that the first moving part 363 moves along the axial direction of the first screw rod 364, since one end of the push rod 361 moves along the When the first moving part 363 moves in the moving direction, it can drive the other end of the push rod 361 to rise or fall, so that the other end of the push rod 361 can push or pull the orientation angle of the rotating plate 35 , that is, the orientation of the detector 33 can be adjusted. .

For example, when the output shaft of the first motor 362 drives the first screw rod 364 to rotate in the clockwise direction, so that the first moving part 363 moves in the direction of the detector 33, at this time, the rotating plate 35 is pushed along the direction of the pushing rod 361. Vertical rotation; on the contrary, when the output shaft of the first motor 362 drives the first screw rod 364 to rotate in the counterclockwise direction, so that the first moving part 363 moves in the direction of the first motor 362, at this time, the push rod 361 is pulled to rotate The plate 35 rotates laterally so that the orientation of the detector 33 can be adjusted according to actual needs.

It can be understood that the first moving part 363 in the embodiment of the present invention is a first nut. The specific operating principle is that when the first screw rod 364 is rotating, the thread pattern on the first screw rod 364 cooperates with the first nut. , so that the height difference of the thread pattern generates a spiral moment, so that the first nut can generate linear motion along the axial direction of the first screw rod 364 .

As shown in Figure 2, in a specific embodiment, the movable frame 32 includes a bottom plate 322 and a plurality of connecting columns 321 provided on the top of the bottom plate 322; wherein, multiple elastic members 34 are provided, at least one elastic member 34 The two ends of the elastic members 34 are respectively connected to the bottom plate 322 and the bottom of the vibrating frame 31. The same ends of the remaining elastic members 34 are connected to the vibrating frame 31, and the other ends are connected to the connecting columns 321 respectively.

Specifically, when some grains collide with the detector 33, the entire vibrating table is vibrated by the squeezing or pushing of the plurality of elastic members 34, and then the detector 33 is used to detect the vibration. Therefore, the vibrating frame 31 can achieve irregular vibration, thereby improving the authenticity of the simulated combine harvester operation.

For example, when some grains are thrown out and the vibrating frame 31 is squeezed downward, the elastic member 34 at the bottom of the vibrating frame 31 is squeezed, and the elastic member 34 pushes the entire vibrating frame 31 from top to upward. It vibrates repeatedly, and then detects its vibration amplitude through the detector 33.

Or for example, four connecting posts 321 are provided in an array, and both ends of the plurality of elastic members 34 are respectively connected to the vibrating frame 31 and each connecting post 321 . After part of the grains are thrown out, when the vibrating frame 31 is pushed laterally, the elastic member 34 between the vibrating frame 31 and each connecting column 321 is squeezed, and the elastic member 34 pushes the entire vibrating frame 31 to vibrate repeatedly laterally. , and then detect its vibration amplitude through the detector 33.

In order to be able to simulate different grain loss conditions caused by different types of combine harvesters; for this reason, in a specific embodiment, the detection device also includes a third driver 4, and the third driver 4 is drivingly connected to the movable frame 32. To drive the movable frame 32 to move. Specifically, the third driver 4 drives the movable frame 32 to move laterally, that is, drives the detector 33 to move to different detection positions, so as to adjust the detector 33 to be in the best detection position, thereby simulating different types of combine harvesting. Different grain loss conditions caused by the machine.

As shown in FIG. 4 , specifically, the third driver 4 includes a second motor 41 , a second screw rod, and a second moving part 43 ; the movable frame 32 is disposed on the second moving part 43 , and the second moving part 43 and the second moving part 43 The two screws are threadedly connected, and the output shaft of the second motor 41 is drivingly connected to one end of the second screw; when the first motor 362 drives the second screw to rotate in the circumferential direction, the second moving part 43 moves along the axis of the second screw. Move in the direction to drive the movable frame 32 to move.

Specifically, when the output shaft of the second motor 41 drives the second screw to rotate in the circumferential direction, so that the second moving part 43 can move along the axial direction of the second screw to drive the movable frame 32 to move, Then, the adjustment detector 33 is moved to different detection positions.

For example, when the output shaft of the second motor 41 drives the second screw rod to rotate clockwise or counterclockwise, the second moving part 43 moves along the length of the second screw rod, thereby driving the movable frame 32 to move.

It can be understood that the second moving part 43 in the embodiment of the present invention is also a nut. The specific operating principle is that when the second screw rod is rotating, the thread pattern on the second screw rod cooperates with the second nut, so that The height difference of the thread pattern generates a spiral torque to cause the second nut to move linearly along the axial direction of the second screw rod.

In a further embodiment, the second driver 36 is provided with two, specifically, the second screw rod of the previous second driver 36 (hereinafter referred to as the second screw rod a42a) and the second screw rod of the latter second driver 36. The screw rod (hereinafter referred to as the second screw rod b42b) is arranged vertically; therefore, it can be understood that the second screw rod a42a extends along the X-axis direction, the second screw rod b42b extends along the Y-axis direction, and the second screw rod b42b is arranged on The top of the second moving part 43 of the previous second driver 36 is thus configured to move the movable frame through the two second moving parts 43 respectively along the axial direction of the second screw a42a and the second screw b42b. 32 moves to different positions so that the detector 33 can be located at the best detection position.

In order to be able to fix external material trays 22 with different outer diameters; to this end, as shown in FIG. 1 , in a specific embodiment, the detection device also includes at least two clamping assemblies 5 for clamping the outer material tray 22 . Specifically, each clamping assembly 5 includes a clamping part and a cylinder, and the output shaft of the cylinder is connected to the clamping part. When replacing the outer material tray 22, the output shaft of each cylinder pulls each clamping portion to move in a direction away from each other to release the outer material tray 22; when assembling the outer material tray 22, the output shaft of each cylinder pushes each clamp The holding parts move in the direction of approaching each other until they can be fixedly clamped on the outer material tray 22; thereby improving the stability of the outer material tray 22 and preventing the outer material tray 22 from falling when the inner material tray 21 rotates rapidly. fall.

Furthermore, each clamping portion is formed with an arc-shaped surface for fitting with the outer wall of the outer material tray 22, so as to increase the contact area between each clamping portion and the outer material tray 22, and further improve the stability of the outer material tray 22. sex.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalent methods within the technical scope disclosed in the present invention. Modifications or substitutions shall be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A device for detecting the loss of grains, the device comprising:

a mounting frame;

the material throwing assembly comprises an inner material tray, an outer material tray and a first driver in driving connection with the inner material tray; the outer tray is fixedly arranged on the mounting frame, the inner tray is rotatably arranged in the outer tray, a first discharge hole is formed in the side wall of the outer tray in a penetrating manner, a containing cavity for containing grains is formed in the inner tray in a hollow manner, and a second discharge hole communicated with the containing cavity is formed in the side wall of the inner tray in a penetrating manner; when the first driver drives the inner tray to rotate along the circumferential direction until the second discharge port is correspondingly communicated with the first discharge port, grains are thrown out;

the detection assembly comprises a vibration frame, a movable frame, a detector and a plurality of elastic pieces; the movable frame is arranged on the mounting frame, one ends of the elastic pieces are connected with the vibration frame, the other ends of the elastic pieces are connected with the movable frame, and the detector is arranged at the top of the vibration frame and used for detecting loss after grains are thrown out.

2. The apparatus for detecting loss of grains according to claim 1, wherein the material throwing assembly further comprises an adjusting part movably arranged in the first discharge port; when the adjusting part moves along the length of the first discharging hole, the outer diameter of the first discharging hole is increased or reduced.

3. A device for detecting the loss of grains according to any of claims 2 and 3, wherein a feeding portion communicating with the accommodating chamber is provided in the inner tray.

4. The apparatus for detecting the loss of grains according to claim 1, wherein the detecting assembly further comprises a rotating plate and a second driver; the detector is arranged on the rotating plate, one side of the rotating plate is rotationally connected with the top of the vibration frame, and the second driver is in driving connection with the rotating plate; when the second driver drives the rotating plate to rotate, the orientation of the detector is adjusted.

5. The apparatus for detecting a loss of grains according to claim 4, wherein the second driver includes a push rod, a first motor, a first moving part, and a first screw; the first moving part is in threaded connection with the first screw rod, one end of the pushing rod is in rotary connection with the first moving part, the other end of the pushing rod is in rotary connection with the rotating plate, and an output shaft of the first motor is connected with one end of the first screw rod; when the first motor drives the first screw rod to rotate along the circumferential direction, the first moving part moves along the axial direction of the first screw rod, so that the pushing rod drives the rotating plate to rotate.

6. The apparatus for detecting the loss of grains according to claim 1, wherein the movable frame includes a bottom plate and a plurality of connecting columns provided on top of the bottom plate;

the elastic pieces are provided with a plurality of elastic pieces, at least one of the two ends of each elastic piece are respectively connected to the bottom plate and the bottom of the vibration frame, the other elastic pieces are connected to the same end of the vibration frame, and the other ends of the elastic pieces are respectively connected to the connecting columns.

7. The apparatus according to claim 1, further comprising a third driver drivingly connected to the movable frame for driving the movable frame to move.

8. The apparatus for detecting a loss of grains according to claim 7, wherein the third driver includes a second motor, a second screw, and a second moving portion; the movable frame is arranged on the second moving part, the second moving part is in threaded connection with the second screw rod, and an output shaft of the second motor is in driving connection with one end of the second screw rod; when the second motor drives the second screw rod to rotate, the second moving part moves along the axial direction of the second screw rod so as to drive the movable frame to move.

9. The apparatus according to claim 8, wherein two second drivers are provided, and the second screw of the former second driver is perpendicular to the second screw of the latter second driver.

10. The apparatus for detecting the loss of grains according to claim 1, further comprising at least two holding members for holding the outer tray.