A threshing cylinder with variable threshing gap

Abstract

The application discloses a threshing cylinder with variable threshing gap, and relates to the technical field of threshing equipment of combine harvesters, which comprises a cylinder shaft, a spiral feeding head, a cylinder, a grooved rod block, an extendable push plate and a slip ring, the cylinder is provided with the spiral feeding head at one end, grains are fed through the spiral feeding head, the grooved rod block is uniformly arranged on the peripheral surface of the cylinder, the grooved rod block of the rotating threshing cylinder threshes the grains, the extendable push plate is arranged in the cylinder, the extendable push plate is engaged with the bottom of the grooved rod block, the reciprocating movement of the extendable push plate drives the up-and-down extension of the grooved rod block, the grooved rod block can move up and down along the radial direction of the cylinder, and the adjustment of the threshing gap is realized; the slip ring is arranged at the cylinder shaft of one side of the cylinder and is used for connecting external power lines, the extendable push plate which can move linearly reciprocally and the grooved rod block which can move up and down and is engaged with the extendable push plate are arranged, the movement of the extendable push plate drives the up-and-down movement of the grooved rod block, the threshing gap is adjusted, the separation of the grains is not affected under the premise that the quality and the rate of the grain threshing are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a threshing device of a combine harvester, and more particularly to a threshing cylinder with variable threshing gap. BACKGROUND

[0002] The threshing and separating device is the core of the combine harvester and plays a decisive role in the working performance of the whole machine. Threshing gap, feed rate and rotation speed of the threshing cylinder are important parameters affecting the working performance of the threshing and separating device. The feed rate of the combine harvester is affected by factors such as machine forward speed, cutting width, cutting stubble height, crop yield, stem moisture content, grain moisture content, and straw-grain ratio. Currently, the forward speed is controlled by the operator's experience to adjust the feed rate, which is difficult to maintain the rated feed rate. When the combine harvester is working under non-rated feed rate, the optimal threshing gap should be matched to make the threshing effect of the combine harvester best. Therefore, it is necessary to develop a threshing and separating device with adjustable threshing gap, study the matching relationship between the feed rate and the threshing gap, and adjust the threshing gap in time according to the feed rate to effectively improve the threshing performance under non-rated working conditions.

[0003] Currently, domestic and foreign enterprises have carried out related research on the threshing gap. However, almost all of them use adjusting concave plates to adjust the threshing gap, which changes the volume of the threshing chamber and affects the separation operation. The LEXION 780 combine harvester developed by German Claas has an automatic threshing system that automatically optimizes the rotation speed of the threshing cylinder and the threshing gap according to the crop harvesting conditions. Bo Zhuhai and Zhang Xueqiang designed a threshing gap adjusting mechanism for manual adjustment of the cut-flow threshing and separating device, which can be flexibly adjusted according to experience for different crops. Zhang Chengwen designed a load monitoring system for the threshing and separating device by using a structure in which one end of the concave screen is hinged to a hydraulic cylinder and the other end rotates around the hinge point, which can automatically increase the threshing gap for unblocking operation when blocking occurs. Wang Dianzhong invented a threshing and separating device with adjustable threshing gap in which the four corners of the concave screen are hinged to a hydraulic cylinder. Li Yaoming et al. studied a threshing and separating device with multiple cylinders supported by a hydraulic cylinder at the bottom of the concave screen.

[0004] Therefore, there is a need for a new type of threshing cylinder with adjustable threshing gap to avoid the problem of changing the threshing space and affecting the threshing and separation performance caused by adjusting the concave plate to adjust the threshing gap. SUMMARY

[0005] In view of the control mode of the existing combine harvester and the research of domestic and foreign scholars, the present application provides a threshing cylinder with variable threshing gap. The present application sets a telescopic push plate that can move linearly and a pattern rod block that can move up and down in engagement with the telescopic push plate. The movement of the telescopic push plate drives the up-and-down movement of the pattern rod block, thereby achieving the adjustment of the threshing gap.

[0006] The technical scheme of the present application is as follows: a threshing cylinder with variable threshing gap, comprising a cylinder shaft, a spiral feeding head, a cylinder and a groove block, the cylinder is rotationally connected with a vehicle frame through the cylinder shaft arranged at both ends, the cylinder is provided with the spiral feeding head at one end, the groove blocks are evenly arranged along the peripheral surface of the cylinder, the groove blocks can move up and down along the radial direction of the cylinder, the cylinder is internally provided with an extension push plate, and a slip ring is arranged at one side of the cylinder shaft;

[0007] The groove block comprises an inclined tooth block, a fixing frame, an inclined sliding plate, a connecting rod and a limiting spring, the inclined tooth block is fixed with the inclined sliding plate through the connecting rod, the bottom of the inclined sliding plate is arc-shaped, the fixing frame is fixed on the cylinder, the inclined tooth block is slidingly arranged on the fixing frame, the bottom of the fixing frame is provided with a hole, the connecting rod passes through the hole at the bottom of the fixing frame, the top of the inclined sliding plate of the connecting rod is provided with the limiting spring and is mounted on the inner wall of the cylinder, the inclined tooth block is located at the upper portion of the fixing frame, and the inclined sliding plate is located at the bottom of the fixing frame.

[0008] The extension push plate comprises a reciprocating circular table, a sliding shaft, a sleeve, a fixed cover and a linear motor, the reciprocating circular table is a circular table, the peripheral surface of the reciprocating circular table is engaged with the bottom of the inclined sliding plate, one end of the reciprocating circular table is fixed with the sliding shaft, the outer periphery of the sliding shaft is provided with splines, the sleeve is a cylindrical hollow pipe, the inner side of the sleeve is provided with a spline groove, and the sliding shaft is engaged with the sleeve; the fixed cover comprises a circular shell, a rib plate and a square inner shell, the square inner shell is fixed in the circular shell through the rib plate, the fixed cover is fixed in the cylinder through the circular shell, the linear motor is fixed at one side of the square inner shell, the sleeve is fixed at the other side of the square inner shell, the shaft of the linear motor passes through the sleeve and is fixedly connected with the sliding shaft, and the power line of the linear motor is connected with an external power supply through the slip ring.

[0009] The fixing frame comprises a frame body and an arc plate, the frame body is a frame structure without a cover, the bottom of the frame body is provided with a hole, the connecting rod passes through the hole at the bottom of the frame body, the inclined tooth block is located at the upper portion of the frame body, the inclined sliding plate is located at the bottom of the frame body, the arc plate is located at the bottom of the frame body, the arc plate is an arc plate, the arc plate is tangent to the cylinder, and the arc plate is provided with a mounting hole for fixedly connecting the fixing frame with the cylinder; the hollow shape of the frame body is consistent with the shape of the inclined tooth block, and the frame body is in clearance fit with the inclined tooth block.

[0010] The inclined tooth block is made of metal material, the top of the inclined tooth block is an inclined tooth arranged in an inclined manner, and the inclined tooth block is a trapezoidal body; the frame body and the inclined tooth block of the fixing frame are all provided with a rounded corner.

[0011] The inclined tooth block is fixed with the inclined sliding plate through two connecting rods arranged side by side.

[0012] The reciprocating circular table is a hollow circular table, and the outer peripheral surface of the reciprocating circular table and the bottom surface of the inclined sliding plate are both subjected to frosted treatment.

[0013] The extension push plate is increased in corresponding number according to the arrangement of the groove block.

[0014] The present application has the following beneficial effects:

[0015] The present application is characterized in that the telescopic push plate and the toothed block are arranged, the linear motor drives the reciprocating circular table to move linearly along the drum axis, and drives the inclined slide plate engaged with the reciprocating circular table to move linearly up and down along the drum radius, that is, to drive the linear up and down movement of the inclined toothed block, so as to adjust the threshing gap without affecting the size of the threshing space.

[0016] The fixed frame is arranged, the fixed frame comprises a frame body and an arc plate, the connecting rod of the toothed block passes through the hole in the bottom of the frame body, the inclined toothed block is located on the upper part of the frame body, the inclined slide plate is located on the bottom of the frame body, the arc plate is tangent to the drum, and mounting holes are arranged on the arc plate for fixing the fixed frame to the drum, the hollow shape of the frame body is consistent with the shape of the inclined toothed block, the frame body and the inclined toothed block are in clearance fit, and the inclined toothed block can move up and down in the frame body, so that the impact force during threshing does not affect the position of the toothed block.

[0017] The telescopic push plate capable of linear reciprocation is innovatively designed, one end of the reciprocating circular table is fixed with a sliding shaft, splines are arranged on the outer periphery of the sliding shaft, the sleeve is a cylindrical hollow pipe, spline grooves are arranged on the inner side of the sleeve, and the sliding shaft is engaged with the sleeve; the shaft of the linear motor passes through the sleeve and is fixedly connected with the sliding shaft, that is, the linear reciprocation of the reciprocating circular table is driven according to requirements, and then the toothed block is driven to move linearly along the drum radius.

[0018] When assembled, the limit spring is arranged between the inner wall of the drum and the inclined slide plate to apply an elastic force to the inclined slide plate, so that the centrifugal movement of the inclined toothed block under the action of centrifugal force is effectively prevented, and the threshing gap is not affected.

[0019] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and the content of the specification can be implemented, the following will be described in detail with the preferred embodiment of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show one embodiment of the present application, therefore should not be regarded as limiting the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained from these drawings.

[0021] Figure 1 is the schematic diagram of the shaft side structure of the embodiment of the present application;

[0022] Figure 2 is the schematic diagram of the half cut structure of the embodiment of the present application;

[0023] Figure 3 is the schematic diagram of the embodiment of the present application Figure 2 is the enlarged view of the I part in the middle;

[0024] Figure 4Figure 1 is a perspective view of a slanted shaft structure of a textured rod block according to an embodiment of the present application;

[0025] Figure 5 Figure 2 is a perspective view of an orthogonal shaft structure of a textured rod block according to an embodiment of the present application;

[0026] Figure 6 Figure 3 is a shaft side view of a fixed frame of a textured rod block according to an embodiment of the present application;

[0027] Figure 7 Figure 4 is a perspective view of a slanted shaft structure of a telescopic push plate according to an embodiment of the present application;

[0028] Figure 8 Figure 5 is a perspective view of an orthogonal shaft structure of a telescopic push plate according to an embodiment of the present application;

[0029] Figure 9 Figure 6 is a half cut view of a telescopic push plate according to an embodiment of the present application.

[0030] In the drawings:

[0031] 1, drum shaft; 2, spiral feeding head; 3, drum; 4, textured rod block; 5, telescopic push plate; 6, slip ring;

[0032] 401, slanted tooth block; 402, fixed frame; 403, slanted slide plate; 404, connecting rod; 405, limiting spring; 4021, frame body; 4022, arc plate;

[0033] 501, reciprocating circular table; 502, slide shaft; 503, sleeve; 504, fixed cover; 505, linear motor; DETAILED DESCRIPTION

[0034] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0035] Referring to Figures 1-9 , a preferred embodiment of the present application is a threshing cylinder with variable threshing gap, comprising a drum shaft 1, a spiral feeding head 2, a drum 3 and a textured rod block 4, the drum 3 is rotatably connected with the frame through the drum shaft 1 arranged at both ends, the drum 3 is provided with the spiral feeding head 2 at one end, the grain is fed through the spiral feeding head 2, the textured rod block 4 is evenly arranged along the drum 3, the textured rod block 4 of the rotating threshing cylinder 3 threshes the grain, the textured rod block 4 can move up and down along the radial direction of the drum 3 to adjust the threshing gap, the telescopic push plate 5 is arranged inside the drum 3, the telescopic push plate 5 is engaged with the bottom of the textured rod block 4, the reciprocating movement of the telescopic push plate 5 drives the up and down telescoping of the textured rod block 4, and the slip ring 6 is arranged at one side of the drum shaft 1;

[0036] The rack block 4 comprises an inclined tooth block 401, a fixing frame 402, an inclined slide plate 403, a connecting rod 404 and a limiting spring 405, the inclined tooth block 401 is fixed with the inclined slide plate 403 through the connecting rod 404, the bottom of the inclined slide plate 403 is arc-shaped, the fixing frame 402 is fixed on the roller 3, the inclined tooth block 401 is slidingly arranged on the fixing frame 402, the top of the inclined tooth block 401 is an inclined tooth arranged in an inclined manner, the inclined tooth block 401 is a trapezoidal body, the inclined tooth block 401 is used for directly contacting with grains for threshing, the bottom of the fixing frame 402 is provided with a hole, the connecting rod 404 penetrates through the hole at the bottom of the fixing frame 402, the top of the inclined slide plate 403 of the connecting rod 404 is provided with the limiting spring 405 mounted on the inner wall segment of the roller 3, the inclined tooth block 401 is located at the upper portion of the fixing frame 402, and the inclined slide plate 403 is located at the bottom of the fixing frame 402.

[0037] The telescopic push plate 5 comprises a reciprocating circular table 501, a sliding shaft 502, a sleeve pipe 503, a fixed cover 504 and a linear motor 505, the reciprocating circular table 501 is a circular table, the peripheral surface of the reciprocating circular table 501 is engaged with the bottom of the inclined slide plate 403, one end of the reciprocating circular table 501 is fixed with the sliding shaft 502, the outer periphery of the sliding shaft 502 is provided with a spline, the sleeve pipe 503 is a cylindrical hollow pipe, the inner side of the sleeve pipe 503 is provided with a spline groove, and the sliding shaft 502 is engaged with the sleeve pipe 503; the fixed cover 504 comprises a circular shell, a rib plate and a square inner shell, the square inner shell is fixed in the circular shell through the rib plate, the fixed cover 504 is fixed in the roller 3 through the circular shell, the linear motor 505 is fixed on one side of the square inner shell, the sleeve pipe 503 is fixed on the other side of the square inner shell, the shaft of the linear motor 505 penetrates through the sleeve pipe 503 and is fixedly connected with the sliding shaft 502, and the power line of the linear motor 505 is connected with an external power supply through the slip ring 6, so that the power line of the linear motor 505 is prevented from being wound due to connection with the external environment.

[0038] The linear motor 505 drives the linear motion of the sliding shaft 502, that is, drives the linear reciprocating motion of the reciprocating circular table 501 according to requirements, when being assembled, the peripheral surface of the reciprocating circular table 501 is engaged with the bottom of the inclined slide plate 403, the top of the inclined slide plate 403 of the connecting rod 404 is provided with the limiting spring 405 mounted on the inner wall segment of the roller 3, and the linear motion of the reciprocating circular table 501 can make the inclined slide plate 403 move up and down, that is, realize the up-and-down motion of the inclined tooth block 401 to adjust the threshing gap; through the elastic force of the limiting spring 405 on the inclined slide plate 403, the centrifugal motion of the inclined tooth block 401 under the action of centrifugal force is effectively prevented, and the threshing gap is affected.

[0039] The fixed frame 402 comprises a frame body 4021 and an arc plate 4022, the frame body 4021 is a frame structure without a cover, the frame body 4021 is provided with a hole in the bottom, the connecting rod 404 passes through the hole in the bottom of the frame body 4021, the inclined tooth block 401 is located on the upper part of the frame body 4021, the inclined slide plate 403 is located on the bottom of the frame body 4021, the arc plate 4022 is located on the bottom of the frame body 4021, the arc plate 4022 is an arc plate, the arc plate 4022 is tangent to the roller 3, and the arc plate 4022 is provided with a mounting hole for fixing the fixed frame 402 and the roller 3; the hollow shape of the frame body 4021 is consistent with the shape of the inclined tooth block 401, and the frame body 4021 is in clearance fit with the inclined tooth block 401.

[0040] The inclined tooth block 401 is made of metal, the top of the inclined tooth block 401 is provided with an inclined tooth in an inclined manner, the inclined tooth block 401 is a trapezoidal body, and the frame body 4021 and the inclined tooth block 401 of the fixed frame 402 are all provided with a rounded corner.

[0041] The inclined tooth block 401 is fixed with the inclined slide plate 403 through two connecting rods 404 arranged side by side, when the inclined tooth block 401 rotates at high speed and collides with grains, the inclined tooth block 401 will be subjected to a large setback force, and the two connecting rods 404 can ensure the stability of the inclined tooth block 401 and avoid the misalignment of the inclined tooth block 401 affecting threshing.

[0042] The reciprocating circular table 501 is a hollow circular table, and the outer circumferential surface of the reciprocating circular table 501 and the bottom surface of the inclined slide plate 403 are both subjected to frosted treatment. The reciprocating circular table 501 is a hollow circular table, so that the weight of the telescopic push plate 5 is reduced, and the movement of the reciprocating circular table 501 does not affect the dynamic balance of the threshing roller 3; the outer circumferential surface of the reciprocating circular table 501 and the bottom surface of the inclined slide plate 403 are both subjected to frosted treatment, so that the friction of the outer circumferential surface of the reciprocating circular table 501 and the bottom surface of the inclined slide plate 403 is increased, and the sliding of the inclined slide plate 403 does not affect the position of the inclined tooth block 401.

[0043] The telescopic push plate 5 is increased in number according to the setting of the grain rod block 4.

[0044] As a further scheme of the application, the frame body 4021 and the inclined tooth block 401 of the fixed frame 402 are both provided with a rounded corner, so that the breaking of grains caused by the collision of grains with the frame body 4021 and the inclined tooth block 401 is reduced.

[0045] The working principle of the application is as follows:

[0046] The threshing cylinder 3 is connected and fixed with the outside through the cylinder shaft 1, the outside power device drives the threshing cylinder 3 to rotate through the cylinder shaft 1, the spiral feeding head 2 feeds the grain to the threshing area composed of the cylinder 3 and the concave plate, the operator drives the slide shaft 502 fixed with the linear motor 505 to slide along the sleeve 503 through the linear extension and retraction movement of the linear motor 505, the linear motion of the reciprocating circular table 501 is realized, the oblique slide plate 403 meshed with the circumferential surface of the reciprocating circular table 501 realizes the up and down movement along the radial direction of the cylinder 3 due to the movement of the reciprocating circular table 501, the oblique tooth block 401 connected with the oblique slide plate 403 realizes the up and down movement under the constraint of the frame body 4021 of the fixed frame 402, the adjustment of the threshing gap is realized without changing the threshing space.

[0047] The above only is the preferred embodiment of the present application, and is not used to limit the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, can also make several improvements and variations, these improvements and variations also should be considered as the protection scope of the present application.

Claims

1. A threshing drum with variable threshing gap, characterized in that: It includes a roller shaft (1), a spiral feed head (2), a roller (3) and a textured bar block (4). The roller (3) is rotatably connected to the frame through the roller shaft (1) set at both ends. A spiral feed head (2) is set at one end of the roller (3). The textured bar block (4) is evenly arranged along the circumference of the roller (3). The textured bar block (4) can move up and down along the radial direction of the roller (3). A telescopic push plate (5) is set inside the roller (3). A slip ring (6) is set at one side of the roller shaft (1). The textured bar block (4) includes a helical tooth block (401), a fixed frame (402), a helical slide plate (403), a connecting rod (404), and a limiting spring (405). The helical tooth block (401) is fixed to the helical slide plate (403) through the connecting rod (404). The bottom of the helical slide plate (403) is arc-shaped. The fixed frame (402) is fixed on the roller (3). The helical tooth block (401) is slidably set on the fixed frame (402). The bottom of the fixed frame (402) is provided with a hole. The connecting rod (404) passes through the hole at the bottom of the fixed frame (402). The top of the helical slide plate (403) of the connecting rod (404) and the inner wall section of the roller (3) are equipped with a limiting spring (405). The helical tooth block (401) is located on the upper part of the fixed frame (402), and the helical slide plate (403) is located on the bottom of the fixed frame (402). The telescopic push plate (5) includes a reciprocating frustum (501), a sliding shaft (502), a sleeve (503), a fixing cover (504), and a linear motor (505). The reciprocating frustum (501) is a frustum, and its circumference meshes with the bottom of the inclined slide plate (403). A sliding shaft (502) is fixed to one end of the reciprocating frustum (501), and a spline is provided on the outer circumference of the sliding shaft (502). The sleeve (503) is a cylindrical hollow tube, and a spline groove is provided on the inner side of the sleeve (503). The sliding shaft (502) and the sleeve... The tube (503) engages; the fixed cover (504) includes a circular outer shell, ribs, and a square inner shell. The square inner shell is fixed inside the circular outer shell by the ribs. The fixed cover (504) is fixed inside the roller (3) by the circular outer shell. The linear motor (505) is fixed on one side of the square inner shell, and the sleeve (503) is fixed on the other side of the square inner shell. The shaft of the linear motor (505) passes through the sleeve (503) and is fixedly connected to the sliding shaft (502). The power line of the linear motor (505) is connected to the external power source through the slip ring (6).

2. A threshing drum with variable threshing gap according to claim 1, characterized in that: The fixing frame (402) includes a frame (4021) and an arc plate (4022). The frame (4021) is an open frame structure. The bottom of the frame (4021) is provided with a hole. The connecting rod (404) passes through the hole at the bottom of the frame (4021). The helical tooth block (401) is located at the upper part of the frame (4021). The helical slide plate (403) is located at the bottom of the frame (4021). The arc plate (4022) is located at the bottom of the frame (4021). The arc plate (4022) is an arc-shaped plate. The arc plate (4022) is tangent to the roller (3). The arc plate (4022) is provided with mounting holes for fixing the fixing frame (402) and the roller (3). The hollow shape inside the frame (4021) is consistent with the shape of the helical tooth block (401). The frame (4021) and the helical tooth block (401) are in clearance fit.

3. A threshing drum with variable threshing gap according to claim 2, characterized in that: The helical tooth block (401) is made of metal. The top of the helical tooth block (401) is an inclined tooth. The helical tooth block (401) is a trapezoidal body. The frame (4021) of the fixing frame (402) and the helical tooth block (401) are both provided with rounded corners.

4. A threshing drum with variable threshing gap according to claim 3, characterized in that: The helical tooth block (401) is fixed to the helical slide plate (403) by two connecting rods (404) arranged side by side.

5. A threshing drum with variable threshing gap according to claim 4, characterized in that: The reciprocating frustum (501) is a hollow frustum, and the outer circumference of the reciprocating frustum (501) and the bottom surface of the inclined slide plate (403) are both frosted.

6. A threshing drum with variable threshing gap according to claim 5, characterized in that: The telescopic push plate (5) is increased in number according to the setting of the textured bar block (4).

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