A motion unit, closed loop operating mechanism and device

Abstract

This invention relates to the field of mechanical devices, particularly agricultural machinery, and specifically to a motion unit, a closed-loop operating mechanism, and a device. The operating mechanism includes two motion units and an eccentric member located between the two motion units, with both motion units connected to the eccentric member. The solution of this application achieves stable operation and external work of the mechanical device using a simpler structure, reducing structural costs and minimizing vibration.

Description

Technical Field

[0001] This invention relates to the field of mechanical devices, and more particularly to the field of agricultural mechanical devices, specifically to a motion unit, a closed-loop operating mechanism, and a device. Background Technology

[0002] The crankshaft, connecting rod, and piston mechanism is a common mechanical mechanism directly used in internal combustion engines and compressors. In an internal combustion engine, the piston reciprocates continuously, driving the crankshaft to perform work via the connecting rod. In this case, the crankshaft is the power-performing component, and the connecting rod is the intermediate transmission component. In a compressor, the crankshaft rotates under stress, driving the piston to reciprocate and perform work via the connecting rod. In this case, the piston is the power-performing component, and the connecting rod is the transmission component.

[0003] Similar structures to crankshaft connecting rod piston mechanisms are also used in some mechanical devices, such as screening machines. Screening machines have a screen component. The crank, cam, or eccentric wheel on the screening machine is similar to the crankshaft structure in a crankshaft connecting rod piston mechanism, and the screen component is similar to a piston. A connecting rod is connected to the crank, cam, or eccentric wheel, and the connecting rod connects to the screen component. The crank, cam, or eccentric wheel drives the screen component to perform linear reciprocating motion on the frame via the connecting rod, thus causing the screen component to continuously move and oscillate, achieving screening. Therefore, the operating principle of the screening machine is the same as that of the crankshaft connecting rod piston mechanism. The screen component, like a piston, performs work externally, and the connecting rod acts as a transmission component. This screening machine has the following disadvantages: 1. The screen component (similar to the piston in a crankshaft connecting rod piston mechanism) is the component that performs work externally. The movement of the screen component requires a connecting rod as a transmission component, and the connecting rod cannot be omitted, making the structure relatively complex. 2. During operation, the screen components of the screening machine will vibrate due to their reciprocating motion. The vibration of the screen components will cause the entire device to vibrate significantly, resulting in loud noise and instability on the ground.

[0004] Chinese utility model patent CN207430678U discloses a novel vibration device. In this prior art, a vibration motor drives a lower vibrating screen to perform rotary vibration via a power arm. When the lower vibrating screen vibrates, it drives an upper vibrating screen to perform rotary vibration via a rocker arm. Since the midpoint of the rocker arm is fixed to the upper edge of the frame and the two ends are connected to the upper and lower vibrating screens respectively, the vibration direction of the upper vibrating screen is opposite to that of the lower vibrating screen. During vibration, the vibration forces of the two vibrating screens cancel each other out, which can effectively reduce noise and also prevent the frame from vibrating, causing deformation or damage.

[0005] However, in this existing technology, the vibrating motor acts as the drive source, and the power arm, similar to a connecting rod, serves as a transmission component to drive the lower vibrating screen. The lower vibrating screen performs work externally and requires the power arm as a transmission component for its drive; therefore, the power arm cannot be omitted, resulting in a relatively complex structure. To ensure a stable connection between the upper and lower vibrating screens, at least two rocker arms are required between both ends of each screen. This requires at least two (pairs) of rocker arms to effectively support the upper vibrating screen. Using only one (pair) of rocker arms would not provide sufficient support, further complicating the structure. Furthermore, since the vibrating motor and power arm are located below the lower vibrating screen, the right ends of the upper and lower screens are not connected, meaning they do not operate in a closed loop. Additionally, the distance between the upper vibrating screen and the vibrating motor is relatively large, causing the work done by the motor to be indirectly transmitted to the upper screen over this distance, resulting in some waste of the motor's work.

[0006] Chinese patent application CN106269513A discloses a grain air-separation vibrating screen. In this prior art, both the upper and lower screens are connected to a vibration generator. The vibration generator includes a drive shaft with two eccentric wheels mounted on it. These eccentric wheels are connected to the upper and lower screens respectively via connecting rods. Rotation of the drive shaft drives the eccentric wheels, which in turn drive the connecting rods, causing the upper and lower screens to reciprocate. The two eccentric wheels are arranged symmetrically on the drive shaft, so the reciprocating motions of the upper and lower screens are also symmetrical, with opposite vibration directions. That is, when the upper screen moves forward, the lower screen moves backward. This cancels out the vibrations generated by the upper and lower screens, resulting in minimal vibration in the entire machine.

[0007] However, in this existing technology, the eccentric wheel drives the connecting rod, which acts as a transmission component to drive the upper and lower screens in reciprocating motion. The connecting rod cannot be omitted, resulting in a relatively complex structure. Furthermore, the upper and lower screens are connected to their respective fixed bases via suspension rods, making them two independent structures that do not operate in a closed loop. The work done by the vibration generator is indirectly transmitted to the upper and lower screens over a considerable distance, causing some waste of the vibration generator's work. Summary of the Invention

[0008] The present invention aims to provide a motion unit, a closed-loop operating mechanism and device, so as to enable the mechanical device to operate stably and perform work externally with a simpler structure, reduce production costs, reduce vibration of the mechanical device, and reduce energy waste generated by the motor.

[0009] First, the present invention provides an operating mechanism, including two motion units and an eccentric member located between the two motion units, wherein both motion units are connected to the eccentric member.

[0010] The principle and advantages of this solution are as follows: The rotation of the eccentric component directly drives two motion units, which then perform work on the external environment. There is no connecting rod between the eccentric component and the motion units, eliminating the need for a connecting rod structure compared to existing technologies. This simplifies the structure, allowing the mechanical device to operate and perform work using a simpler design, thus reducing production costs. Alternatively, the eccentric component and motion units can be viewed as analogous to crankshaft-connecting rod mechanisms in existing technologies, with the eccentric component equivalent to the crankshaft and the motion units equivalent to the connecting rod. In this case, the connecting rod directly performs work, eliminating the need for a piston structure similar to those in existing technologies, further simplifying the structure and enabling the mechanical device to operate and perform work using a simpler design, thus reducing production costs. Therefore, this solution solves the problem of complex existing structures for external work by simplifying the structure.

[0011] Because the eccentric component is located between the two motion units, with the two motion units situated on either side of the eccentric component, the distance between the eccentric component and the two motion units is relatively shorter compared to when the eccentric component is located on the outer sides of the two motion units, allowing it to directly drive the motion units at a closer distance. This reduces the waste of work done by the drive source, thus improving the utilization of the drive source's work. Therefore, this solution, by placing the eccentric component between the two motion units to directly drive them, also solves the problem of energy waste caused by the drive source's work, enabling the two motion units to utilize the work done by the drive source more efficiently.

[0012] Preferably, as an improvement, the two motion units are a first motion unit and a second motion unit, and the eccentric component connected to the first motion unit and the eccentric component connected to the second motion unit have the same rotation center and rotate at the same speed.

[0013] Therefore, when the eccentric component rotates, the eccentric component connected to the first motion unit drives the first motion unit to move, and at the same time, the eccentric component connected to the second motion unit drives the second motion unit to move. The two motion units move simultaneously and perform closed-loop motion. Closed-loop motion means that the motions of the two motion units are not separate but interconnected. This interconnection occurs at least at the point where the motion units are connected to the eccentric component. When one motion unit moves, the other motion unit also moves, thus jointly performing work externally, which helps to improve the work efficiency and increase the processing and production efficiency.

[0014] Therefore, the operating mechanism of this preferred solution is a closed-loop operating mechanism. This closed-loop operating mechanism enables the two motion units to move in a regular manner according to a certain motion trajectory, rather than moving randomly. The motion trajectory of the two motion units is related to the phase difference of the eccentric components connected to the two motion units. In other words, the phase difference of the eccentric components on the two motion units determines the motion trajectory of the two motion units.

[0015] Preferably, as an improvement, the phase difference between the eccentric component connected to the first motion unit and the eccentric component connected to the second motion unit is 180°.

[0016] Therefore, the eccentric components on the two motion units move in opposite directions, and the movements of the two motion units cooperate with each other, resulting in opposite directions of motion. The vibrations generated by the two motion units can cancel each other out to a certain extent, leading to better closed-loop operation and virtually no noticeable vibration. This helps reduce overall device noise and makes the entire device more stable. Thus, this solution solves the problem of significant vibration and noise during device operation in existing technologies.

[0017] Preferably, as an improvement, each motion unit is rotatably connected to a swing element; or, Each motion unit is connected to a lug; or, Each motion unit is connected to a sling; or, Each motion unit is equipped with a slider or a groove.

[0018] Therefore, the motion unit is connected to a swinging component, which supports the motion of the motion unit. The motion unit can also be movably connected to the frame of the entire device via lugs, straps, sliders, or grooves, thereby supporting the motion of the motion unit.

[0019] Preferably, as an improvement, it also includes a swing element, which is shared by the two motion units, and the swing element and the two motion units are rotatably connected; the swing element is provided with a rotation fixing position.

[0020] Therefore, the two motion units share a common oscillating component. By sharing this component, both motion units can be supported simultaneously. Compared to setting separate oscillating components for each motion unit, this reduces the number of oscillating components used, resulting in a simpler structure and lower production costs. At this point, the phase difference between the eccentric components on the first motion unit and the second motion unit must be 180°; otherwise, the two motion units will interfere with each other, jam, and malfunction.

[0021] In addition, the two motion units are connected by a shared swinging component and an eccentric component with the same rotation center. Compared to the two motion units not sharing a swinging component but only being connected by an eccentric component with the same rotation center (this state is not a completely closed-loop operation state, but a semi-closed-loop operation state), a completely closed-loop operation is achieved. The two motion units pull and push the shared swinging component respectively, and the two motion units cooperate with each other to act on the swinging component, making the operation of the two motion units more stable.

[0022] In addition, in this solution, the eccentric component and the swing component can support and connect the motion unit respectively, eliminating the need for additional connection and support structures, which helps to reduce the number of parts used and lower the structural cost.

[0023] Preferably, as an improvement, the eccentric parts on the first motion unit and the eccentric parts on the second motion unit are of the same size.

[0024] Preferably, as an improvement, the distance between the rotatable connection point of the swing member and the two motion units and the rotatable fixed position is equal.

[0025] The eccentric parts on the first motion unit and the eccentric parts on the second motion unit are the same in size, which means that their sizes are basically the same. The distances between the rotating connection points on the swinging parts and the rotating fixed positions of the two motion units are equal, which means that the distances are basically equal. The reason why they are roughly the same or equal is because there are certain errors and differences in the processing, manufacturing and installation process, and these errors and differences cannot be avoided.

[0026] By limiting the size of the eccentric component or by limiting the distance between the rotating connection point on the oscillating component and the fixed rotation position, the motion trajectories and amplitudes of the two motion units can be made more consistent, thus improving the vibration cancellation effect. Of course, when both the eccentric components on the first and second motion units are the same size, and the distance between the rotating connection point on the oscillating component and the fixed rotation position is equal, the motion trajectories and amplitudes of the two motion units will be essentially consistent, resulting in an even better and more effective vibration cancellation.

[0027] Preferably, as an improvement, the eccentric component is an eccentric wheel, a cam, or a crankshaft.

[0028] Therefore, different structures can be selected for the eccentric component to achieve the purpose of making the motion unit run.

[0029] Preferably, as an improvement, the motion unit includes a motion body for directly performing work externally, the motion body including a frame; a drive connection part for connecting with an eccentric component is fixedly provided on the motion body, the drive connection part is provided with an eccentric component hole, and a swing connection part is fixedly provided on the motion body.

[0030] The eccentric hole on the motion unit is used to assemble the eccentric component, and the swing connection is used to rotate with the swing component. When the running mechanism is running, the motion unit swings, and the motion body acts as a component that performs external work to achieve purposes such as production, processing, and handling.

[0031] In addition, the present invention also provides a motion unit, which is the motion unit in the above-mentioned operating mechanism.

[0032] In addition, the present invention also provides an apparatus, including a frame; the frame is provided with the above-mentioned operating mechanism, and the motion unit is movably connected to the frame.

[0033] Because the device is equipped with a closed-loop operating mechanism, the advantages of the operating mechanism can also be reflected in the device.

[0034] Of course, the above solution can be further optimized in the following ways.

[0035] Preferably, as an improvement, the drive connection is located at one end of the moving body, and the swing connection is located at the other end of the moving body.

[0036] Preferably, as an improvement, the moving body also includes a working part, which is mounted on the frame. Thus, when the moving body moves, the moving unit performs work on the external environment, but more specifically, the frame drives the working part to move together, and the working part performs work on the external object.

[0037] Preferably, as an improvement, the working part is a screen, a cutter, a striking part, or a grinding part.

[0038] Therefore, depending on the object to which the work is performed, the working part can have different structures, such as a screen, a cutter, a striking part, or a grinding part. When it is a screen, the device can be a screening device that can screen grains, plant seeds, other particulate matter, etc. When it is a cutter, a striking part, or a grinding part, the device can be a cutting device, a striking device, or a grinding device that can cut, strike, or grind items.

[0039] Preferably, as an improvement, the drive connection is fixed to the moving body by welding, bolting, or integral connection; the swing connection is fixed to the moving body by welding, bolting, or integral connection.

[0040] Preferably, as an improvement, the eccentric component on the first motion unit and the eccentric component on the second motion unit are coaxially fixed.

[0041] Therefore, the eccentric parts on the two motion units are fixed coaxially. The drive source drives the shaft, and the eccentric parts on the two motion units rotate simultaneously. There is no need to use multiple drive sources, the structure is simple, and it helps to save production costs. Attached Figure Description

[0042] Figure 1 A simplified structural diagram of the motion unit.

[0043] Figure 2 A simplified structural diagram of the first operating mechanism in a closed-loop operating mechanism.

[0044] Figure 3 A simplified structural diagram of the second operating mechanism in a closed-loop operating mechanism.

[0045] Figure 4 A simplified structural diagram of the closed-loop operating mechanism (the first motion unit and the second motion unit in the diagram are connected to the swinging component respectively).

[0046] Figure 5 A simplified structural diagram of the closed-loop operating mechanism (the first and second motion units share a common swing element).

[0047] Figure 6 This is a phase diagram of two eccentric components.

[0048] Figure 7 This is a schematic diagram showing two eccentric components connected to the drive shaft of a motor.

[0049] Figure 8 This is a schematic diagram of a grain air separation device.

[0050] Figure 9 This is a schematic diagram of the closed-loop operating mechanism in a grain air separation device.

[0051] Figure 10 This is a schematic diagram of the first motion unit in a grain air separation device.

[0052] Figure 11 This is a schematic diagram of the second motion unit in a grain air separation device. Detailed Implementation

[0053] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: motion unit 1, motion body 11, drive connection part 12, swing connection part 13, eccentric hole 14, working part 15, eccentric part 21, bearing 22, swing part 23, rotation fixed position 24, running mechanism 3, first motion unit 31, second motion unit 32, motor 4, drive shaft 5, grain air separation device 6. Example 1

[0054] This embodiment specifically discloses a motion unit 1, combined with... Figure 1 The schematic diagram of the motion unit 1 shown includes a motion body 11 for directly performing work externally; the motion body 11 is provided with a drive connection part 12 for connecting with the eccentric member 21. Figure 1 The diagram illustrates one drive connection part 12. Of course, in different embodiments, there can be multiple drive connection parts 12 (the projections of multiple drive connection parts 12 in the vertical plane of the paper overlap). The drive connection part 12 is provided with an eccentric hole 14; the moving body 11 is provided with a swing connection part 13. Figure 1 The diagram illustrates a single swing connection 13. Of course, in different embodiments, there may be multiple swing connections 13, and the projections of the multiple swing connections 13 in the vertical plane of the paper overlap each other.

[0055] Figure 1 The drive connection 12 is located at the left end of the moving body 11, and the swing connection 13 is located at the right end of the moving body 11. Of course, the drive connection 12 and the swing connection 13 are not necessarily located at the ends of the moving body 11; they can be located at any position on the moving body 11.

[0056] Figure 1 Both the drive connection portion 12 and the swing connection portion 13 extend and bend toward the same side of the moving body 11. Of course, in other embodiments, the swing connection portion 13 may also be flush with the moving body 11 (e.g., Figure 11 As shown, the swing connection 13 is the right end of the moving body 11, and the swing connection 13 and the moving body 11 are parallel and do not extend laterally.

[0057] The drive connection part 12 can be fixed to the moving body 11 by welding, bolting, or integral connection; the swing connection part 13 can be fixed to the moving body 11 by welding, bolting, or integral connection. In practical applications, different fixing methods can be selected according to the situation.

[0058] In this embodiment, the drive connection part 12 is used to connect with the eccentric member 21. Therefore, the shape, size, and fixing method of the drive connection part 12 are not important. Any structure used to connect with the eccentric member 21 can be called the drive connection part 12. In this embodiment, the swing connection part 13 is used to connect with the swing member 23 mentioned below. Therefore, the shape, size, and fixing method of the swing connection part 13 are not important. Any structure used to connect with the swing connection part can be called the drive connection part 12.

[0059] The moving body 11 includes a frame and a working part. The frame's function is to fix and support the working part. The frame can be a frame, block-shaped structure, or any other design. The working part's function is to contact and process external objects. The working part is mounted on the frame. Depending on the object being processed, the working part can be a screen, cutter, striking component (hammer or roller), or grinding component (grinding block), but it is not limited to these. For example... Figure 8 , Figure 10 As shown, when the working part is a screen, the motion unit 1 can be applied to the grain air separation device 6. The motion body includes a frame, and the top view of the frame can be a square frame. The screen is installed in the frame.

[0060] In this embodiment, the moving body 11 is used to directly perform work on external materials. Therefore, the structure, size, and shape of the moving body 11 are not important; any similar structure that directly performs work on external materials can be called the moving body 11. When the working part is a sieve, the moving body 11 can screen agricultural particles through the sieve. When the working part is a cutter, the moving body 11 can perform cutting operations. When the working part is a striking or grinding component, the moving body 11 can strike or grind external objects through movement. The specific type, structure, and shape of the working part are not innovative in this embodiment. The moving unit 1 moves, and the working part processes external materials. The specific structure and shape of the working part can be set according to actual conditions, and will not be described in detail in this embodiment. Example 2

[0061] This embodiment, based on embodiment 1, discloses a closed-loop operating mechanism 3, which can be referred to. Figures 2-11 .

[0062] Combination Figures 2-4 As shown, this embodiment discloses a closed-loop operating mechanism 3, including two motion units 1; the two motion units 1 are respectively Figure 2 The first motion unit 31 and Figure 3 The second motion unit 32 in the middle.

[0063] Combination Figure 4As shown, the first motion unit 31 and the second motion unit 32 are connected to form a closed-loop operating mechanism 3. Specifically, the eccentric component 21 on the first motion unit 31 and the eccentric component 21 on the second motion unit 32 are set at the same rotation center. In this embodiment, they are specifically coaxially fixedly connected, meaning that the eccentric component 21 on the first motion unit 31 and the eccentric component 21 on the second motion unit 32 are simultaneously fixedly connected to the drive shaft 5 of the same motor 4. Of course, in different embodiments, the eccentric component 21 on the first motion unit 31 and the eccentric component 21 on the second motion unit 32 can also be connected to different drive shafts and driven simultaneously by different drive sources.

[0064] Both the swing connection portion on the first motion unit 31 and the swing connection portion on the second motion unit 32 are connected to swing members 23. The rotational fixing position 24 of the swing member 23 on the first motion unit 31 and the rotational fixing position 24 of the swing member 23 on the second running mechanism 32 are rotatably connected to the frame of the mechanical device. Figure 4 As shown, the rotation fixing position 24 of the swing member 23 on the first operating mechanism 31 and the rotation fixing position 24 of the swing member 23 on the second operating mechanism 32 are set on the same rotation axis. Of course, in other embodiments, they can be set on different rotation axes.

[0065] In this embodiment, the first motion unit 31 and the second motion unit 32 are located on both sides of the rotation center of the eccentric member 21, and the eccentric member 21 is located between the first motion unit 31 and the second motion unit 32. The first motion unit 31 and the second motion unit 32 are opposite or substantially opposite to each other.

[0066] Therefore, since the closed-loop operating mechanism 3 includes a first motion unit 31 and a second motion unit 32, the first motion unit 31 and the motion unit 32 are located on both sides of the rotation center of the eccentric member 21, and the first motion unit 31 and the second motion unit 32 are opposite or basically opposite each other. When the eccentric member 21 rotates, the eccentric member 21 on the first motion unit 31 drives the motion body 11 to move, and at the same time, the eccentric member 21 on the second motion unit 32 drives the motion body 11 to move. The two motion bodies 11 move at the same time and perform closed-loop motion. The so-called closed-loop motion means that the motion of the first motion unit 31 and the second motion unit 32 is not separate, but interconnected. Specifically, the first motion unit 31 and the second motion unit 32 are interconnected at the eccentric member 21. When the first motion unit 31 moves, the second motion unit 32 also moves, so as to jointly perform work externally, which is conducive to improving the work efficiency.

[0067] In the aforementioned closed-loop operating mechanism 3, the swing element 23 of the first motion unit 31 and the swing element 23 of the second motion unit 32 are independent and do not constitute a 100% closed-loop operating structure; they can be considered a semi-closed-loop structure. Therefore, in conjunction with... Figure 5 As shown, the first motion unit 31 and the second motion unit 32 share a swing member 23, which is a swing arm. The middle part of the swing member 23 is a rotation fixing position 24 for rotational fixation on the mechanical device. The swing connecting part 13 of the first motion unit 31 is rotatably connected to the top end of the swing member 23, and the swing connecting part 13 of the second motion unit 32 is rotatably connected to the bottom end of the swing member 23. At this time, as... Figure 6 and Figure 7 As shown, the phase difference between the rotation of the eccentric member 21 on the first motion unit 31 and the eccentric member 21 on the second motion unit 32 is 180°.

[0068] In this way, by sharing the swing element 23, the two motion units can be supported simultaneously. Compared with setting the swing element 23 separately for the first motion unit 31 and the second motion unit 32, it is beneficial to reduce the number of swing elements 23 used, making the structure simpler and the production cost lower. At the same time, since the phase difference between the rotation of the eccentric element 21 on the first motion unit 31 and the eccentric element 21 on the second motion unit 32 is 180°, the movement trajectories of the eccentric elements 21 on the first motion unit 31 and the second motion unit 32 are opposite. The movements of the first motion unit 31 and the second motion unit 32 cooperate with each other, so that the movement directions of the first motion unit 31 and the second motion unit 32 are opposite. For example, if the first motion unit 31 moves to the left (or right), then the second motion unit 32 moves to the right (or left); if the first motion unit 31 moves upward (or downward), then the second motion unit 32 moves downward (or upward); the two motion units move according to this rule. The vibrations generated by the first motion unit 31 and the second motion unit 32 can cancel each other out to a certain extent. The closed-loop operation of the first motion unit 31 and the second motion unit 32 is better, and there is basically no obvious vibration. Using them in mechanical devices can help reduce the noise of the entire device and make the operation of the entire device more stable.

[0069] Figure 6 The eccentric component 21 on the first motion unit 31 and the eccentric component 21 on the second motion unit 32, as shown in the diagram, have the same dimensions. Figure 5 In the first motion unit 31, the distance from the swing connecting part 13 to the rotation fixed position 24 is equal to the distance from the swing connecting part 13 to the rotation fixed position 24 of the second motion unit 32. Of course, in other embodiments, the dimensions of the two eccentric members 21 may be different, and the distance from the swing connecting part 13 to the rotation fixed position 24 of the first motion unit 31 may not be equal to the distance from the swing connecting part 13 to the rotation fixed position 24 of the second motion unit 32. These can all be adjusted adaptively according to actual conditions.

[0070] Of course, in other implementations... Figure 7 The two eccentric parts 21 can also be fixed together.

[0071] In this embodiment, the eccentric component 21 is an eccentric wheel, which is rotatably connected to the eccentric component hole 14 via the bearing 22. Through this embodiment, the motor 4 drives two motion units to move continuously via the eccentric component 21. The motion body 11 of the motion unit 1 directly performs work externally (more specifically, the working part of the motion body 11 performs work externally). There is no linkage structure connecting the eccentric component 21 and the motion unit 1. Compared with the prior art, the linkage structure is eliminated, thus simplifying the structure and enabling the mechanical device to operate and perform work externally using a simpler structure, which helps to reduce production costs.

[0072] Alternatively, the eccentric component 21 and the motion unit 1 can be regarded as the crankshaft connecting rod mechanism in the prior art, where the eccentric component 21 is equivalent to the crankshaft and the motion unit 1 is equivalent to the connecting rod. In this case, the connecting rod directly performs work externally, without the need to set up a piston structure similar to that in the prior art, thus simplifying the structure and enabling the mechanical device to operate and perform work externally using a simpler structure, which is beneficial to reducing production costs.

[0073] In this embodiment, during the operation of the running mechanism 3, since the drive shaft 5 of the motor 4 and the eccentric component 21 are coaxially and fixedly connected, the eccentric component 21 and the drive shaft 5 support the two drive connection parts 12 of the running mechanism 3, and the swing component 23 supports the swing connection part 13. The running mechanism 2 is relatively stable during operation and does not require the setting of other support structures.

[0074] Of course, in other embodiments, the eccentric component 21 can be replaced with a crankshaft, with the connecting rod shaft diameter of the crankshaft rotatably engaged with the eccentric component hole 14. The drive shaft 5 of the motor 4 is connected to the crankshaft, and the drive shaft 5 of the motor 4 drives the crankshaft to rotate, thereby driving the motion unit 1 to reciprocate. Of course, the crankshafts of the motion units can be integrated as one unit or set separately.

[0075] Of course, in other embodiments, the eccentric element 21 can also be a cam. By rotating the cam, the cam protrusion repeatedly abuts against the motion unit 1 driving the connecting part 12, thereby realizing the continuous movement of the motion unit 1. The cams on the two motion units can be connected as one piece or set separately.

[0076] Of course, in other embodiments, the swing connection may not be swing-connected to the external frame without a swinging member. The swing connection can be movably connected to the frame in other ways, such as by a slider or groove (one of the slider or groove is located on the swing connection, and the other is located on the frame), or by a lug or strap to movably connect the swing connection to the frame. The movable connection method of the motion unit on the frame is not limited to the example in this embodiment, and can also be achieved through other movable methods. Example 3

[0077] This embodiment uses the closed-loop operation mechanism 3 from embodiment 2 as an example of its application to the grain air separation device 6 for illustration.

[0078] Combination Figures 6-11 As shown, the grain air separation device 6 includes a frame; a closed-loop operating mechanism 3 is provided on the frame.

[0079] The closed-loop operation mechanism 3 in this embodiment includes, as follows: Figure 10 The first motion unit 31 shown and as shown Figure 11 The second motion unit 32 shown is formed by connecting the first motion unit 31 and the second motion unit 32 together. Figure 9 In the structure shown, the first motion unit 31 and the second motion unit 32 share a single swing member 23. The rotating fixed position 24 at the middle of the swing member 23 is rotatably connected to the frame. The top of the swing member 23 is rotatably connected to the swing connection part 13 at the right end of the motion body 11 frame of the first motion unit 31. The bottom of the swing member 23 is rotatably connected to the swing connection part 13 at the right end of the motion body 11 frame of the second motion unit 32. In this embodiment, there are two swing members 23, which are arranged to overlap each other to form a pair (for overlapping, therefore...). Figure 9 Only one swing member 23 can be seen, and the two swing members 23 clamp the swing connection 13 on the first operating mechanism 31 and the second operating mechanism 32. Of course, in other embodiments, the number of swing members 23 may be different.

[0080] The frame is a horizontal working part 15, which is a screen. A drive connection part 12 is fixed to the left end of the frame of the first motion unit 31 and the left end of the frame of the second motion unit 32 by bolts.

[0081] Combination Figure 8 As shown, a drive source is mounted on the frame, and the drive source is motor 4, combined with... Figure 7 As shown, two eccentric parts 21 are mounted on the drive shaft 5 of motor 4, combined with Figures 6-7 As shown, the phase difference between the two eccentric components 21 is 180°. The two eccentric components 21 are respectively mounted in the eccentric component holes 14 of the two drive connection parts 12 via bearings 22.

[0082] The number of screens installed on each frame can be set to a different number, depending on the actual situation.

[0083] In this embodiment, the drive connection part 12 on each frame is used as an example. Of course, in different implementations, each frame can be configured with a different number of drive connection parts 12. In this case, the eccentric part 21 needs to be configured as multiple, but the phase of the eccentric part 21 on the same motion unit is consistent.

[0084] Therefore, motor 4 drives eccentric component 21 to rotate, and the first motion unit 31 and the second motion unit 32 move together. Since the phase difference between the eccentric components 21 of the first motion unit 31 and the second motion unit 32 is 180°, the motion directions of the first motion unit 31 and the second motion unit 32 are opposite. The vibrations generated by the first motion unit 31 and the second motion unit 32 can cancel each other out to a certain extent, which helps to reduce the vibration of the entire device. During grain screening, the grain entering from the feed inlet of the grain air separation device 6 falls onto the screen of the first motion unit 31, which screens the grain. The grain falling down through the screen of the first motion unit 31 falls onto the screen of the second motion unit 32, where it undergoes further and more thorough screening.

[0085] The grain air separation device 6, through the closed-loop operating mechanism 3 in this embodiment, compared to the screen movement mode in the prior art, forms a crankshaft-connecting rod-like structure with the eccentric wheel and the motion unit 1. The motion unit 1 is similar to a connecting rod, and the moving body 11 of the motion unit 1 directly performs work externally. This is equivalent to omitting the piston structure, resulting in a simpler structure and reducing production costs. Alternatively, the eccentric wheel directly drives the motion unit 1 during operation, and there is no connecting rod between the motion unit 1 and the eccentric wheel, which is equivalent to omitting the connecting rod, simplifying the structure and reducing production costs.

[0086] In addition, the closed-loop operating mechanism 3 is a closed-loop structure. The so-called closed loop means that the first motion unit 31 and the second motion unit 32 are interconnected. The first motion unit 31 and the second motion unit 32 are driven by the coaxial eccentric member 21 to push and pull the swing member 23 respectively. With this closed-loop operating mechanism, with fewer parts (without setting multiple sets of swing members 23 or other structures to support the motion units), the coaxially connected eccentric member 21 and the shared swing member 23 realize the driving of supporting and running the first motion unit 31 and the second motion unit 32, and can also cancel the vibration of the entire device.

[0087] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An operating mechanism, characterized in that: It includes two motion units and an eccentric component located between the two motion units, with both motion units connected to the eccentric component.

2. The operating mechanism according to claim 1, characterized in that: The two motion units are the first motion unit and the second motion unit, respectively. The eccentric component connected to the first motion unit and the eccentric component connected to the second motion unit have the same rotation center and rotate at the same speed.

3. The operating mechanism according to claim 2, characterized in that: The phase difference between the eccentric component connected to the first motion unit and the eccentric component connected to the second motion unit is 180°.

4. The operating mechanism according to claim 3, characterized in that: The eccentric component on the first motion unit and the eccentric component on the second motion unit have the same size.

5. The operating mechanism according to any one of claims 1-4, characterized in that: The eccentric component is an eccentric wheel, a cam, or a crankshaft.

6. The operating mechanism according to any one of claims 1-4, characterized in that: The motion unit includes a motion body for directly performing work externally, the motion body including a frame; a drive connection part for connecting with an eccentric component is fixedly provided on the motion body, the drive connection part is provided with an eccentric component hole, and a swing connection part is fixedly provided on the motion body.

7. The operating mechanism according to any one of claims 1-4, characterized in that: Each motion unit is rotatably connected to a swinging component; or, Each motion unit is connected to a lug; or, Each motion unit is connected to a sling; or, Each motion unit is equipped with a slider or a groove.

8. The operating mechanism according to any one of claims 1-4, characterized in that: It also includes a swinging component, which is shared by the two motion units. The swinging component and the two motion units are rotatably connected. The swinging component is provided with a rotational fixing position. The distance between the part of the swinging component that is rotatably connected to the two motion units and the rotational fixing position is equal.

9. A motion unit, characterized in that: The motion unit is the motion unit in the operating mechanism described in any one of claims 1-8.

10. An apparatus, characterized in that: Includes a frame; the frame is provided with the operating mechanism as described in any one of claims 1-8, and the motion unit is movably connected to the frame.

Images