A vibration screen structure with adjustable amplitude and frequency and a combine harvester

Abstract

The present invention provides an amplitude-frequency adjustable vibrating screen structure and a combine harvester, comprising a frame, a vibrating screen body, an amplitude adjustment mechanism, and an intermediate transmission mechanism, wherein the amplitude adjustment mechanism comprises an oblique connecting member and an amplitude adjustment plate, wherein the lower end of the oblique connecting member is fixedly connected to the vibrating screen body, the amplitude adjustment plate is swingably arranged in a vertical plane relative to the higher end of the oblique connecting member, the intermediate transmission mechanism comprises a driving wheel, a driven wheel, and a vibrating screen connecting rod, wherein the driving wheel is rotatably mounted on the frame, the driven wheel and the driving wheel are connected by a belt drive, the driven wheel is rotatably mounted on the frame and the speed is adjustable, the first end of the vibrating screen connecting rod is connected to the outer end surface of the driven wheel and is offset from the rotation center of the driven wheel, the second end is connected to the amplitude adjustment plate, and the position of the amplitude adjustment plate is adjustable. The present application can realize the amplitude and frequency adjustment of the vibrating screen, improve the applicability of the combine harvester, and reduce the loss rate.

Description

Technical Field

[0001] The present invention relates to the technical field of vibrating screens, and in particular to an amplitude and frequency adjustable vibrating screen structure and a combine harvester. Background Art

[0002] The vibrating screen is the main working part of the combine harvester. Its working performance has a significant impact on the impurity rate and loss rate of the harvester. After passing through the threshing drum, the material is still mixed with many impurities, and some impurities are prone to mildew. After separation and cleaning by the vibrating screen, these impurities are removed from the material, which will be more conducive to the storage, transportation and subsequent processing of grain grains.

[0003] Currently, most vibrating screens are mechanical screens that use an eccentric structure with a fixed and unchangeable amplitude. This structure is usually set with parameters for a single crop. The amplitude and frequency of the vibrating screen cannot change with the crop variety being harvested or be adjusted for the different characteristics of a single crop. The fixed amplitude and frequency will not guarantee that the material has more opportunities to pass through the screen, allowing debris blocked on the screen surface to flow out along the screen surface, thereby increasing the loss rate and making the combine harvester unsuitable for use.

[0004] In view of this, it is necessary to propose a vibration screen structure with adjustable amplitude and frequency and a combine harvester to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0005] The main purpose of the present invention is to provide an amplitude and frequency adjustable vibrating screen structure and a combine harvester to solve the problem that the amplitude and frequency of the existing vibrating screen cannot be adjusted, resulting in poor applicability and high loss rate of the combine harvester.

[0006] To achieve the above-mentioned object, the present invention provides an amplitude and frequency adjustable vibrating screen structure, comprising a frame, a vibrating screen body, an amplitude adjustment mechanism, and an intermediate transmission mechanism, wherein the vibrating screen body is mounted on the frame, and the intermediate transmission mechanism and the amplitude adjustment mechanism are located on the same side of the vibrating screen body; wherein,

[0007] The amplitude adjustment mechanism includes an oblique connecting member and an amplitude adjustment plate, wherein the lower end of the oblique connecting member is fixedly connected to the vibrating screen body, and the amplitude adjustment plate is swingably arranged in a vertical plane relative to the upper end of the oblique connecting member, wherein the vertical plane is parallel to the side surface of the vibrating screen body;

[0008] The intermediate transmission mechanism includes a driving wheel, a driven wheel and a vibrating screen connecting rod; the driving wheel is rotatably mounted on the frame, the driven wheel and the driving wheel are connected by a belt transmission, the driven wheel is located below the amplitude adjustment mechanism, the driven wheel is rotatably mounted on the frame and the speed is adjustable; the vibrating screen connecting rod includes a first end and a second end that are oppositely arranged, the first end is connected to the outer end surface of the driven wheel and is offset from the rotation center of the driven wheel, and the second end is connected to the amplitude adjustment plate and the position relative to the amplitude adjustment plate is adjustable;

[0009] The rotation of the driving wheel drives the driven wheel to rotate, drives the vibration screen connecting rod, and thus drives the amplitude adjustment plate to swing in a vertical plane, so as to drive the vibration screen body to vibrate.

[0010] Preferably, the belt tensioning adjustment device is further included between the driving wheel and the driven wheel, and the belt tensioning adjustment device includes a mounting rod, a tensioning wheel, an adjusting screw, a connecting spring, and an upper adjusting nut and a lower adjusting nut screwed on the adjusting screw, wherein the adjusting screw is arranged above the mounting rod and the tensioning wheel, wherein:

[0011] The mounting rod includes a third end and a fourth end relatively arranged, the third end is rotatably connected to the frame, the tensioning wheel is rotatably mounted on the fourth end, a through hole is opened on the frame for the adjusting screw to pass through, the connecting spring is connected between the adjusting screw and the fourth end, the upper adjusting nut and the lower adjusting nut are respectively located on both sides of the through hole, and the tensioning degree of the belt exerted by the tensioning wheel is adjusted by adjusting the positions of the upper adjusting nut and the lower adjusting nut on the adjusting screw.

[0012] Preferably, the driving wheel includes an adjusting spring and two conical wheels that are arranged opposite to each other and coaxially, the spacing distance between the conical surfaces of the two conical wheels can be adjusted, and the belt is wrapped around the belt placement space formed by the conical surfaces of the two conical wheels.

[0013] Preferably, the driven wheel includes a wheel body and an eccentric block, the wheel body is rotatably mounted on the frame, the eccentric block is fixed on the outer end surface of the wheel body, and the first end of the vibrating screen connecting rod is connected to the outer end surface of the eccentric block.

[0014] Preferably, a first connecting hole for a pin to pass through is formed at the high end of the inclined connecting member, the extension direction of the first connecting hole is consistent with the horizontal direction of the vibrating screen body, the amplitude adjustment plate is provided with a second connecting hole corresponding to the first connecting hole, and the amplitude adjustment plate is swingably connected to the inclined connecting member by a pin passing through the first connecting hole and the second connecting hole.

[0015] Preferably, the amplitude adjustment plate is provided with a waist-shaped hole, the extension direction of the waist-shaped hole is consistent with the length direction of the amplitude adjustment plate, and the swing amplitude of the amplitude adjustment plate is adjusted by adjusting the position of the vibration screen connecting rod in the waist-shaped hole.

[0016] Preferably, the eccentric block is fixedly connected to the wheel body by bolts.

[0017] The present invention also provides a combine harvester, comprising a harvester body and the above-mentioned amplitude and frequency adjustable vibration screen structure.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides an amplitude-frequency adjustable vibrating screen structure and a combine harvester, comprising a frame, a vibrating screen body, an amplitude adjustment mechanism, and an intermediate transmission mechanism, wherein the amplitude adjustment mechanism comprises an oblique connecting member and an amplitude adjustment plate, wherein the lower end of the oblique connecting member is fixedly connected to the vibrating screen body, the amplitude adjustment plate is swingably arranged in a vertical plane relative to the higher end of the oblique connecting member, the intermediate transmission mechanism comprises a driving wheel, a driven wheel, and a vibrating screen connecting rod, wherein the driving wheel is rotatably mounted on the frame, the driven wheel and the driving wheel are connected by a belt drive, the driven wheel is rotatably mounted on the frame and the speed is adjustable, the first end of the vibrating screen connecting rod is connected to the outer end surface of the driven wheel and is offset from the rotation center of the driven wheel, the second end is connected to the amplitude adjustment plate, and the position of the amplitude adjustment plate is adjustable. The present application can realize the amplitude and frequency adjustment of the vibrating screen, improve the applicability of the combine harvester, and reduce the loss rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 It is a front view of the overall structure of one embodiment of the present invention;

[0022] Figure 2 A top view of the overall structure of an embodiment of the present invention;

[0023] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0025] Description of Figure Numbers:

[0026] 10. Frame; 20. Vibrating screen body; 30. Amplitude adjustment mechanism; 310. Oblique connecting piece; 320. Amplitude adjustment plate; 330. Waist-shaped hole; 40. Intermediate transmission mechanism; 410. Driving wheel; 411. Adjusting spring; 412. Tapered wheel; 420. Driven wheel; 421. Wheel body; 422. Eccentric block; 430. Vibrating screen connecting rod; 440. Belt; 50. Belt tensioning adjustment device; 510. Mounting rod; 520. Tensioning wheel; 530. Adjusting screw; 540. Connecting spring; 550. Upper adjusting nut; 560. Lower adjusting nut. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of Technical Solution 1 is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Please see the attached Figure 1-3In one embodiment of the present invention, an amplitude and frequency adjustable vibrating screen structure is provided, comprising a frame 10, a vibrating screen body 20, an amplitude adjustment mechanism 30 and an intermediate transmission mechanism 40, wherein the vibrating screen body 20 is mounted on the frame 10, the intermediate transmission mechanism 40 and the amplitude

[0032] The adjustment mechanism 30 is located on the same side of the vibrating screen body 20, and the overall structure is simpler and more compact by adopting the same-side transmission arrangement.

[0033] An amplitude adjustment plate 320, wherein the lower end of the oblique connection member 310 is fixedly connected to the vibrating screen body 20, and the amplitude adjustment plate 320 is swingably arranged in a vertical plane relative to the upper end of the oblique connection member 310, wherein the vertical plane is parallel to the side surface of the vibrating screen body 20;

[0034] The intermediate transmission mechanism 40 includes a driving wheel 410, a driven wheel 420 and a vibration screen connecting rod 430; the driving wheel 410 is rotatably mounted on the frame 10, the driven wheel 420 and the driving wheel 410 are connected to each other through a belt 440, the driven wheel 420 is located below the amplitude adjustment mechanism 30, the driven wheel 420 is rotatably mounted on the frame 10 and the speed is adjustable; the vibration screen connecting rod 430 includes a first end (not shown) and a second end (not shown) arranged opposite to each other.

[0035] The first end is connected to the outer end surface of the driven wheel 420 and is offset from the rotation center of the driven wheel 420. The second end is connected to the amplitude adjustment plate 320 and is offset from the amplitude adjustment plate 320.

[0036] The position of the segment plate 320 is adjustable; wherein, the rotation of the driving wheel 410 drives the driven wheel 420 to rotate, drives the vibrating screen connecting rod 430 and thereby drives the amplitude adjustment plate 320 to swing in a vertical plane, thereby driving the vibrating screen body 20 to vibrate.

[0037] Working process: Power is input from the driving wheel 410 to make the driving wheel 410 rotate, and then drives the driven wheel 420 to rotate through the belt 0 440, driving the vibrating screen connecting rod 430 connected to the driven wheel 420 to move.

[0038] This drives the amplitude adjustment plate 320 to swing around the high end of the oblique connection piece 310, and then drives the vibrating screen body 20 connected to the oblique connection piece 310 to vibrate. By adjusting the position of the second end of the vibrating screen connecting rod 430 on the amplitude adjustment plate 320, the swing amplitude and the length of the lever arm of the amplitude adjustment plate 320 can be changed.

[0039] Thereby realize the change and adjustment of the amplitude of the vibrating screen. In addition, by changing the speed of the driven wheel 420 rotation, 5 can change the frequency of the vibration of the vibrating screen, based on this, realize the change and adjustment of the amplitude and frequency of the vibrating screen.

[0040] As a preferred embodiment, the belt tensioning adjustment device 40 is further included between the driving wheel 410 and the driven wheel 420. The belt tensioning adjustment device 40 includes a mounting rod 510, a tensioning rod 511, and a tensioning rod 512.

[0041] The tension wheel 520, the adjusting screw 530, the connecting spring 540, and the upper adjusting nut 550 and the lower adjusting nut 560 screwed on the adjusting screw 530, wherein the adjusting screw 530 is arranged above the mounting rod 510 and the tension wheel 520,

[0042] The mounting rod 510 includes a third end (not shown) and a fourth end (not shown) arranged opposite to each other, the third end is rotatably connected to the frame 10, the tensioning wheel 520 is rotatably mounted on the fourth end, and the frame 10 is provided with a through hole (not shown) for the adjusting screw 530 to pass through, the connecting spring 540 is connected between the adjusting screw 530 and the fourth end, the upper adjusting nut 550 and the lower adjusting nut 560 are respectively located on both sides of the through hole, and the position of the upper adjusting nut 550 and the lower adjusting nut 560 on the adjusting screw 530 is adjusted, thereby adjusting the tension of the tensioning wheel 520 on the belt 440.

[0043] As a preferred embodiment, the driving wheel 410 includes an adjusting spring 411 and two conical wheels 412 that are oppositely arranged and coaxially arranged. The spacing distance between the conical surfaces of the two conical wheels 412 can be adjusted, and the belt 440 is wrapped around the belt 440 placement space formed by the conical surfaces of the two conical wheels 412.

[0044] It is worth noting for those skilled in the art that the conical wheel 412 is connected to the driving mechanism for rotation, and the axial spacing distance between the two conical wheels 412 can be adjusted. The specific adjustment process is: the adjusting spring 411 provides the initial spacing distance between the two conical wheels 412. As the tensioning force of the tensioning wheel 520 on the belt 440 changes, for example, when the tensioning force becomes larger, the force of the belt 440 acting on the inclined surface of the bevel gear will also become larger, pushing the two conical wheels 412 to move axially apart, thereby increasing the spacing distance between the two conical wheels 412. At this time, the diameter of the belt 440 wrapped around the conical wheel 412 becomes smaller, which reduces the linear velocity on the belt 440, thereby reducing the rotation speed of the driven wheel 420, and further reducing the vibration frequency of the vibrating screen.

[0045] As a preferred embodiment, the driven wheel 420 includes a wheel body 421 and an eccentric block 422. The wheel body 421 is rotatably mounted on the frame 10. The eccentric block 422 is fixed to the outer end surface of the wheel body 421. The first end of the vibrating screen connecting rod 430 is connected to the outer end surface of the eccentric block 422. The use of the eccentric block 422 facilitates adjustment of the position of the vibrating screen connecting rod 430 and facilitates installation and replacement of the eccentric block 422.

[0046] Furthermore, a first connection hole (not shown) for a pin to pass through is formed at the upper end of the oblique connection member 310. The extension direction of the first connection hole is consistent with the transverse direction of the vibrating screen body 20. The amplitude adjustment plate 320 is provided with a second connection hole (not shown) corresponding to the first connection hole. The amplitude adjustment plate 320 is swingably connected to the oblique connection member 310 via a pin passing through the first and second connection holes. The pin connection allows the amplitude adjustment plate 320 to swing smoothly around the oblique connection member 310.

[0047] As a preferred embodiment, the amplitude adjustment plate 320 is provided with a waist-shaped hole 330, the extension direction of which is consistent with the length direction of the amplitude adjustment plate 320. By adjusting the position of the vibration screen connecting rod 430 in the waist-shaped hole 330, the swing amplitude of the amplitude adjustment plate 320 can be adjusted. It should be noted that by providing the waist-shaped hole 330 on the amplitude adjustment plate 320, it can be understood that the length of the swing force arm of the amplitude adjustment plate 320 around the oblique connecting member 310 is different when the second end of the vibration screen connecting rod is at different positions in the waist-shaped hole 330. Due to the different lengths of the force arm and the different swing amplitudes, the amplitude of the force exerted by the amplitude adjustment plate 320 on the oblique connecting member 310 is different, thereby causing the vibration amplitude of the vibration screen body 20 to be different.

[0048] Optionally, the eccentric block 422 is fixedly connected to the wheel body 421 by bolts. It is understandable that in other embodiments, the eccentric block 422 can also be integrally formed with the wheel body 421, or the eccentric block 422 can be welded or fixed to the outer end surface of the wheel body 421 by other means.

[0049] The present invention further provides a combine harvester, comprising a harvester body and the above-mentioned amplitude and frequency adjustable vibration screen structure.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A vibration screen structure with adjustable amplitude and frequency, characterized in that: The vibrating screen comprises a frame, a vibrating screen body, an amplitude adjustment mechanism and an intermediate transmission mechanism, wherein the vibrating screen body is mounted on the frame, and the intermediate transmission mechanism and the amplitude adjustment mechanism are located on the same side of the vibrating screen body; wherein: The amplitude adjustment mechanism includes an oblique connecting member and an amplitude adjustment plate, wherein the lower end of the oblique connecting member is fixedly connected to the vibrating screen body, and the amplitude adjustment plate is swingably arranged in a vertical plane relative to the upper end of the oblique connecting member, wherein the vertical plane is parallel to the side surface of the vibrating screen body; The intermediate transmission mechanism includes a driving wheel, a driven wheel and a vibrating screen connecting rod; the driving wheel is rotatably mounted on the frame, the driven wheel and the driving wheel are connected by a belt transmission, the driven wheel is located below the amplitude adjustment mechanism, the driven wheel is rotatably mounted on the frame and the speed is adjustable; the vibrating screen connecting rod includes a first end and a second end that are oppositely arranged, the first end is connected to the outer end surface of the driven wheel and is offset from the rotation center of the driven wheel, and the second end is connected to the amplitude adjustment plate and the position relative to the amplitude adjustment plate is adjustable; The driving wheel rotates to drive the driven wheel to rotate, driving the vibration screen connecting rod and thereby driving the amplitude adjustment plate to swing in a vertical plane, thereby driving the vibration screen body to vibrate; The belt tensioning adjustment device is located between the driving pulley and the driven pulley, and the belt tensioning adjustment device includes a mounting rod, a tensioning pulley, an adjusting screw, a connecting spring, and an upper adjusting nut and a lower adjusting nut screwed on the adjusting screw. The adjusting screw is located above the mounting rod and the tensioning pulley, wherein: The mounting rod includes a third end and a fourth end that are relatively arranged, the third end is rotatably connected to the frame, the tensioning wheel is rotatably mounted on the fourth end, a through hole for the adjusting screw to pass through is opened on the frame, the connecting spring is connected between the adjusting screw and the fourth end, the upper adjusting nut and the lower adjusting nut are respectively located on both sides of the through hole, and the tensioning degree of the belt exerted by the tensioning wheel is adjusted by adjusting the positions of the upper adjusting nut and the lower adjusting nut on the adjusting screw; The driving wheel includes an adjustment spring and two tapered wheels arranged opposite to each other and coaxially, the distance between the tapered surfaces of the two tapered wheels is adjustable, and the belt is wrapped around the belt placement space formed by the tapered surfaces of the two tapered wheels; The amplitude adjustment plate is provided with a waist-shaped hole, the extension direction of which is consistent with the length direction of the amplitude adjustment plate. By adjusting the position of the vibration screen connecting rod in the waist-shaped hole, the swing amplitude of the amplitude adjustment plate can be adjusted.

2. The amplitude and frequency adjustable vibrating screen structure according to claim 1, characterized in that: The driven wheel includes a wheel body and an eccentric block. The wheel body is rotatably mounted on the frame. The eccentric block is fixed to the outer end surface of the wheel body. The first end of the vibrating screen connecting rod is connected to the outer end surface of the eccentric block.

3. The amplitude and frequency adjustable vibrating screen structure according to claim 1, characterized in that: A first connecting hole for a pin to pass through is formed at the high end of the inclined connecting member, and the extension direction of the first connecting hole is consistent with the transverse direction of the vibrating screen body. The amplitude adjustment plate is provided with a second connecting hole corresponding to the first connecting hole, and the amplitude adjustment plate is swingably connected to the inclined connecting member by a pin passing through the first connecting hole and the second connecting hole.

4. The amplitude and frequency adjustable vibrating screen structure according to claim 2, characterized in that: The eccentric block is fixedly connected to the wheel body via bolts.

5. A combine harvester, comprising a harvester body, characterized in that: It also includes the amplitude and frequency adjustable vibrating screen structure according to any one of claims 1 to 4.

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