A screen bottom cleaning mechanism for grain cleaning machine

Abstract

The present invention relates to a screen bottom cleaning mechanism for a grain cleaning machine, comprising a scraper mechanism and a screen body; the scraper mechanism comprises a guide column bracket and a scraper group arranged on the guide column bracket, one end of the scraper group is a connection end, and the other end of the scraper group is a free end; the screen body is arranged on a frame through a suspension rod, a main shaft is arranged on the frame, the main shaft is located at the bottom end of the screen body, and eccentric mechanisms are respectively arranged at both ends of the main shaft, and a rocker is connected between the eccentric mechanism and the screen body; the scraper mechanism is arranged at the lower part of the screen body. The eccentric mechanism drives the screen body to realize screening work, and at the same time, the eccentric mechanism also enables the scraper mechanism at the bottom end of the screen body to realize reciprocating scraping, impact and vibration motion between the upper end surface of the scraper mechanism and the bottom surface of the screen body under the joint action of the reversing force and its own mass inertia force, so as to realize the cleaning of foreign matter on the bottom surface of the screen body and the anti-blocking operation of the screen plate holes, thereby meeting the needs of customers for 24-hour continuous and reliable operation in a short harvesting season.

Description

Technical Field

[0001] The invention relates to a cleaning mechanism, in particular to a screen bottom cleaning mechanism used for a grain cleaning machine. Background Art

[0002] When the grain screening and cleaning machine in the grain machinery field is screening rice, wheat, beans and other grains, its screen holes are easily blocked by weeds and foreign objects mixed in the grains, causing blockage and shutdown. The screen holes need to be cleaned in time to ensure the normal use of the grain screening and cleaning machine.

[0003] The existing screen bottom scraping and cleaning mechanisms in the field of grain machinery have the following shortcomings: complex structure, short life, low reliability, inconvenient maintenance, high cost, etc., which cannot meet the needs of customers for 24-hour continuous and reliable operation during the short harvest season. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention provides a screen bottom cleaning mechanism for a grain cleaning machine.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a screen bottom cleaning mechanism for a grain cleaning machine, comprising a scraper mechanism and a screen body;

[0006] The scraper mechanism comprises a guide column bracket and a scraper group arranged on the guide column bracket, one end of the scraper group is a connecting end, the connecting end is detachably connected to the guide column bracket, and the other end of the scraper group is a free end; the free end of the scraper group can move back and forth along the guide column bracket to the connecting end;

[0007] The screen body is arranged on a frame through a suspension rod, and a driving mechanism and a main shaft connected to the driving mechanism are arranged on the frame, the main shaft is located at the bottom end of the screen body, and eccentric mechanisms are respectively arranged at both ends of the main shaft, and a rocker is connected between the eccentric mechanism and the screen body;

[0008] The scraper mechanism is arranged at the lower part of the screen body, and the free end of the scraper assembly is arranged at the lower part of the screen body close to one end of the main shaft.

[0009] In one embodiment of the present invention, the eccentric mechanism comprises an eccentric cam, the eccentric cam is disposed in an eccentric cam bearing seat, and a rocker is connected between the eccentric boss bearing seat and the screen body.

[0010] In one embodiment of the present invention, the guide column bracket includes a guide column and supports arranged at both ends of the guide column, and a scraper group is sleeved on the guide column, and the scraper group is in contact with the bottom end of the screen body.

[0011] In one embodiment of the present invention, a buffer head is provided on the side of the free end of the scraper assembly facing the support.

[0012] In one embodiment of the present invention, the scraper group includes a plurality of scrapers, and the plurality of scrapers are connected in sequence through U-shaped spring sheets.

[0013] In one embodiment of the present invention, the scraper is a flat plate, a spacing is left between two adjacent scrapers, and the spacing at one end between the two adjacent scrapers is greater than the spacing at the other end, and the U-shaped spring sheet connects one end of the two scrapers with a smaller spacing; multiple scrapers are connected in sequence to form an S-shaped elastic scraper group.

[0014] In one embodiment of the present invention, the guide column and the support are detachably connected, and the scraper and the U-shaped spring sheet are connected by rivets.

[0015] In one embodiment of the present invention, there are four guide pillars, which are arranged in parallel between two supports, and there are two scraper groups, each of which is correspondingly sleeved on two guide pillars.

[0016] In one embodiment of the present invention, the screen body includes a screen, which is rectangular, and has two long sides with long side baffles, one short side baffle, and the rocker is arranged between the long side baffle and the eccentric boss bearing seat; one end of the screen with the short side baffle is arranged on the main shaft.

[0017] The beneficial effects of the present invention are as follows: the present invention drives the screen body to realize screening work through the eccentric mechanism, and at the same time, the eccentric mechanism also enables the scraper mechanism at the bottom of the screen body to realize reciprocating scraping, impact and oscillation motion between the upper end surface of the scraper mechanism and the bottom surface of the screen body under the joint action of the reversing force and its own mass inertia force, thereby realizing the cleaning of foreign matter on the bottom surface of the screen body and the anti-blocking operation of the screen holes, with high reliability, simple structure, convenient operation and low maintenance cost, thus meeting the needs of customers for 24-hour continuous and reliable operation during the short harvesting season. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the scraper mechanism structure;

[0020] Figure 3 It is a schematic diagram of the structure of a U-shaped spring sheet;

[0021] Figure 4 It is a schematic diagram of the scraper structure;

[0022] Figure 5 This is a schematic diagram of the connection structure between the scraper mechanism and the screen body. Figure 1;

[0023] Figure 6 This is a schematic diagram of the connection structure between the scraper mechanism and the screen body. Figure 2 ;

[0024] In the figure: 100. guide column bracket; 101. guide column; 102. support; 200. scraper group; 201. connecting end; 202. free end; 203. scraper; 203a. guide column hole; 203b. connecting hole; 204. U-shaped spring sheet; 300. screen body; 301. screen mesh; 302. side long baffle; 303. side short baffle; 400. suspension rod; 500. frame; 501. driving mechanism; 502. main shaft; 600. eccentric mechanism; 601. eccentric cam; 602. eccentric cam bearing seat; 700. rocker; 800. buffer head. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] like Figure 1 A screen bottom cleaning mechanism for a grain cleaning machine is shown, comprising a scraper mechanism and a screen body 300;

[0028] The scraper mechanism comprises a guide post bracket 100 and a scraper group 200 arranged on the guide post bracket, one end of the scraper group 200 is a connecting end 201, and the connecting end 201 is detachably connected to the guide post bracket 100. Specifically, the connecting end 201 and the guide post bracket are connected by bolts, and the other end of the scraper group 200 is a free end 202; the free end 202 of the scraper group can move back and forth along the guide post bracket 100 to the connecting end 201; when the free end 202 is higher than the connecting end 201 under the action of external force, the scraper group 200 moves along the guide post bracket 100 to the connecting end under the action of gravity, and when the free end is lower than the connecting end under the action of external force, the free end 202 moves along the guide post bracket 100 to reset;

[0029] The screen body 300 is arranged on the frame 500 through the suspension rod 400. The frame 500 is provided with a driving mechanism 501 and a main shaft 502 connected to the driving mechanism 501. The main shaft 502 is located at the bottom end of the screen body 300, and eccentric mechanisms 600 are respectively provided at both ends of the main shaft 502. A rocker 700 is connected between the eccentric mechanism 600 and the screen body 300; the scraper mechanism is arranged at the lower part of the screen body 300, and the free end 202 of the scraper group 200 is arranged at the lower part of the screen body near one end of the main shaft; the eccentric mechanism 600 in the present application includes an eccentric cam 601, the eccentric cam 601 is arranged in an eccentric cam bearing seat 602, and a rocker 700 is connected between the eccentric boss bearing seat 602 and the screen body 300. The driving mechanism 501 drives the main shaft 502 to rotate, and the rotating main shaft 502 drives the eccentric cams 601 at both ends thereof to shake around the main shaft, and drives the rocker 700 installed on the eccentric cam bearing seat 602 to shake, thereby realizing the reciprocating motion of the connecting shaft of the suspension rod 400 to complete the screening operation of the grain by the screen body. When the screen body performs the screening operation reciprocatingly, the scraper mechanism installed at the bottom end of the screen body moves back and forth along the guide column bracket 100 to the connecting end under the combined action of the reversing force and its own mass inertia force, so as to realize the reciprocating scraping, impact and oscillation motion between the upper end surface of the scraper group and the bottom surface of the screen body, thereby completing the cleaning of foreign matter on the bottom surface of the screen body and the anti-blocking operation of the screen plate holes by this mechanism.

[0030] like Figure 2As shown, the guide post bracket 100 includes a guide post 101 and a support 102 arranged at both ends of the guide post 101. The support 102 and the screen body 300 are connected by bolts to realize the detachable connection between the scraper mechanism and the screen body. The guide post 101 is provided with a scraper group 200, and the scraper group 200 is in contact with the bottom end of the screen body 300 to ensure that the scraper group continuously scrapes the bottom end of the screen body when it reciprocates back and forth, ensuring the cleaning of foreign matter on the bottom surface of the screen body and realizing the anti-blocking operation of the screen plate holes. As an implementation method, the guide posts 101 in this application are four, and are arranged in parallel between two supports 102. The scraper group 200 is two groups, and each group of scraper groups 200 is correspondingly set on two guide posts 101. The two groups of scraper groups can correspond to two screen bodies, thereby improving the efficiency of grain screening in a short harvest season. In order to facilitate the maintenance and inspection of the guide column bracket 100, the guide column 101 and the support 102 are detachably connected. Specifically, bolts can be used. The connection method is simple and easy to operate.

[0031] When the free end 202 of the scraper group 200 reciprocates back and forth along the guide column support 102, in order to avoid hard contact between the free end 202 and the support, and to avoid deformation or damage of the free end 202 or the support 102, a buffer head 800 is provided on the side of the free end of the scraper group 200 facing the support. The buffer head 800 is made of a deformable material. When the free end of the scraper group 200 approaches the support due to the reversing force and its own mass inertia force, the buffer head 800 serves to isolate the free end from the support, thereby effectively playing a buffering role and extending the service life of the scraper mechanism.

[0032] like Figures 2 to 4 , Figure 6 The scraper group 200 shown includes a plurality of scrapers 203, and the plurality of scrapers 203 are connected in turn by U-shaped spring sheets 204. Specifically, the scrapers 203 and the U-shaped spring sheets 204 are connected by rivets, which is convenient to connect and has high connection strength. The scrapers 203 in the present application are flat plates, and each scraper 203 is provided with a guide post hole 2031 and a connection hole 2032. The setting of the guide post hole facilitates the scraper sleeve to be set on the guide post, and the setting of the connection hole facilitates the connection between the scraper and the U-shaped spring sheet; in the present application, there is a spacing between two adjacent scrapers 203, and the spacing between one end of the two adjacent scrapers 203 is greater than the spacing between the other ends, and the U-shaped spring sheet 204 connects one end of the two scrapers with a smaller spacing; a plurality of scrapers are connected in turn to form an S-shaped elastic scraper group, and the S-shaped elastic scraper group extends the travel of the scraper group when it is reciprocating, thereby improving the efficiency of cleaning foreign matter on the bottom surface of the screen body.

[0033] like Figure 5As shown, the screen body 300 includes a screen 301, which is rectangular. Long side baffles 302 are respectively provided on the two long sides of the screen, and a short side baffle 303 is provided on one of the short sides. The rocker 700 is arranged between the long side baffle 302 and the eccentric boss bearing seat 602; the screen 301 is provided with an end of the short side baffle 303 is arranged on the main shaft 502; the long side baffles and the short side baffles on the three sides of the screen 301 are arranged, and one of the sides of the screen is retained without a baffle, so that the screen plate forms an open cavity, which prevents the grain in the screen body from falling when the grain is screened, and also facilitates the discharge of the grain in the screen from the end without the baffle after the grain screening is completed, thereby improving the efficiency of grain screening.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A screen bottom cleaning mechanism for a grain cleaning machine, characterized in that: It includes a scraper mechanism and a screen body; The scraper mechanism comprises a guide column bracket and a scraper group arranged on the guide column bracket, one end of the scraper group is a connecting end, the connecting end is detachably connected to the guide column bracket, and the other end of the scraper group is a free end; the free end of the scraper group can move back and forth along the guide column bracket to the connecting end; The screen body is arranged on a frame through a suspension rod, a main shaft is arranged on the frame, the main shaft is located at the bottom of the screen body, and eccentric mechanisms are respectively arranged at both ends of the main shaft, and a rocker is connected between the eccentric mechanism and the screen body; The scraper mechanism is arranged at the lower part of the screen body, and the free end of the scraper assembly is arranged at the lower part of the screen body close to one end of the main shaft; The eccentric mechanism comprises an eccentric cam, the eccentric cam is arranged in an eccentric cam bearing seat, and a rocker is connected between the eccentric cam bearing seat and the screen body; The guide column bracket includes a guide column and supports arranged at both ends of the guide column, and a scraper group is sleeved on the guide column, and the scraper group is in contact with the bottom end of the screen body; The scraper group includes a plurality of scrapers, and the plurality of scrapers are connected in sequence through U-shaped spring sheets; The scraper is a flat plate, with a spacing between two adjacent scrapers, and the spacing at one end between the two adjacent scrapers is larger than the spacing at the other end. The U-shaped spring sheet connects one end of the two scrapers with a smaller spacing; multiple scrapers are connected in sequence to form an S-shaped elastic scraper group.

2. The screen bottom cleaning mechanism for a grain cleaning machine according to claim 1, characterized in that: A buffer head is provided on one side of the free end of the scraper assembly facing the support.

3. The screen bottom cleaning mechanism for a grain cleaning machine according to claim 1, characterized in that: The guide column and the support are detachably connected, and the scraper and the U-shaped spring sheet are connected by rivets.

4. The screen bottom cleaning mechanism for a grain cleaning machine according to claim 1, characterized in that: There are four guide pillars, which are arranged in parallel between two supports. There are two scraper groups, and each scraper group is correspondingly sleeved on two guide pillars.

5. The screen bottom cleaning mechanism for a grain cleaning machine according to any one of claims 1 to 4, characterized in that: The screen body includes a screen mesh, which is rectangular. Long side baffles are respectively provided on the two long sides of the screen mesh, and a short side baffle is provided on one of the short sides. The rocker is arranged between the long side baffle and the eccentric cam bearing seat; one end of the screen mesh with the short side baffle is arranged on the main shaft.

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