Connecting mechanism and harvester

Abstract

The utility model relates to the technical field of agricultural machinery equipment, in particular to a connecting mechanism and a harvester, and the connecting mechanism comprises a plate component, a cleaning screen and a connecting component, a first beam member provided to the plate member; the second beam component is arranged on the sorting screen; the limiting component is arranged on the first beam component, and the limiting component is provided with a limiting part; and the connecting component sequentially penetrates through the first beam component, the limiting component and the second beam component to connect the plate component and the sorting screen. According to the connecting mechanism, by optimizing the structures and the connecting modes of the first beam component and the second beam component, the connecting mechanism high in stability is provided, so that the stability and the connecting strength of the connecting structure between the cleaning sieve and the harvester are improved, the situation that the connecting structure of the cleaning sieve loosens and even fails in connection is effectively reduced, and the service life of the cleaning sieve is prolonged. And the probability that the cleaning sieve is abnormal in the working process is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural machinery equipment, and in particular, to a connecting mechanism and a harvester. Background Art

[0002] With the development of wheat harvesting machinery, the wheat harvesting machinery has evolved from initially realizing basic functions to gradually demanding higher reliability. Intelligent and highly reliable wheat harvesters have become the development trend. As the core working component of wheat harvesting machinery, it is always in a state of maximum load operation, and due to the long time affected by the operation season during the improvement and verification process, the reliability improvement of components is relatively slow. Although the failure rate has generally decreased, it remains a high-incidence point of the overall machine failure rate. The cleaning sieve, as the core component of the cleaning system, also has an important impact on the overall operation performance of the machine. Since the cleaning sieve moves reciprocally during operation, with simultaneous vertical and horizontal displacements, the movement and force are relatively complex, and the connecting bolts are prone to loosening due to vibration, resulting in the loosening of the connecting structure or even connection failure, with a consistently high failure rate. The loosening of the connecting structure easily causes abnormal vibration and swaying of the cleaning sieve during movement. Utility Model Content

[0003] The purpose of the present application is to provide a connecting mechanism and a harvester to solve, to a certain extent, the technical problem that the connecting structure of the cleaning sieve in the prior art is prone to loosening or even connection failure, with a relatively high failure rate.

[0004] The present application provides a connecting mechanism for a cleaning sieve, and this connecting mechanism includes:

[0005] A plate member, on which the cleaning sieve is disposed;

[0006] A first beam member, which is disposed on the plate member;

[0007] A second beam member, which is disposed on the cleaning sieve;

[0008] A limiting member, which is disposed on the first beam member and is provided with a limiting portion;

[0009] A connecting member, which sequentially passes through the first beam member, the limiting member, and the second beam member to connect the plate member and the cleaning sieve.

[0010] In the above technical solution, further, the first beam member is provided with a first clamping portion, the second beam member is provided with a second clamping portion, and the shape of the first clamping portion is adapted to the shape of the second clamping portion.

[0011] In any of the above technical solutions, further, a first cavity and a second cavity that communicate with each other are formed inside the first beam member. The first cavity is connected to the second cavity, and the lengths of the first cavity and the second cavity both extend along the length direction of the first beam member; an entrance for passing through the connecting member is provided in the second cavity.

[0012] A third cavity is formed inside the second beam member. A threading channel for passing through the connecting member is provided in the third cavity, and an exit for the connecting member to pass out is provided in the threading channel.

[0013] In any of the above technical solutions, further, the number of the connecting members is multiple, and the multiple connecting members are arranged at intervals along the length direction of the first beam member and the length direction of the second beam member.

[0014] The first clamping portion is provided with a plurality of through holes, and each through hole communicates with the second cavity. The second cavity is connected to the threading channel through the through holes.

[0015] The number of the through holes, the number of the threading channels, and the number of the limiting portions are the same and are not less than the number of the connecting members.

[0016] In any of the above technical solutions, further, the connecting member includes:

[0017] A rod portion that passes through the first cavity, the second cavity, the limiting portion, and the threading channel.

[0018] An end cap that is arranged at one end of the rod portion, and the end cap has a polygonal side.

[0019] A locking member that is detachably arranged at the other end of the rod portion.

[0020] In any of the above technical solutions, further, a limiting flange is arranged at the junction position between the rod portion and the end cap. The limiting flange is arranged along the circumferential direction of the rod portion, and the diameter of the limiting flange is greater than the diameter of the limiting portion.

[0021] In any of the above technical solutions, further, the limiting member is in the shape of a long strip flat plate, the length of the limiting member extends along the length direction of the first beam member, and the limiting member is arranged in the second cavity.

[0022] In any of the above technical solutions, further, the limiting portion has a hole structure that penetrates the limiting member, and the shape of the limiting portion is adapted to the shape of the end cap.

[0023] In any of the above technical solutions, further, the plate member is provided with a mounting portion, the first beam member is disposed in the mounting portion, and the first beam member is disposed at an angle to the plate member.

[0024] The present application also provides a harvester, including the connecting mechanism described in any of the above technical solutions, and further including a cleaning sieve. Therefore, it has all the beneficial technical effects of this connecting mechanism, and will not be elaborated herein.

[0025] Compared with the prior art, the beneficial effects of the present application are as follows:

[0026] The connecting mechanism provided by the present application is particularly applicable to a cleaning sieve. This connecting mechanism includes: a plate member, the cleaning sieve is disposed on the plate member; a first beam member, the first beam member is disposed on the plate member; a second beam member, the second beam member is disposed on the cleaning sieve; a limiting member, the limiting member is disposed on the first beam member, and the limiting member is provided with a limiting portion; a connecting member, the connecting member sequentially passes through the first beam member, the limiting member and the second beam member to connect the plate member and the cleaning sieve.

[0027] The connecting mechanism provided by the present application provides a connecting mechanism with relatively high stability by optimizing the structures and connection methods of the first beam member and the second beam member, thereby improving the stability and connection strength of the connection structure between the cleaning sieve and the harvester, and effectively reducing the probability that the connection structure of the cleaning sieve becomes loose or even fails to connect, resulting in abnormalities during the operation of the cleaning sieve.

[0028] The harvester provided by the present application includes the connecting mechanism described above. Therefore, the failure rate of the cleaning sieve is reduced by this connecting mechanism, thereby improving the stability and continuity of the operation process of this harvester, reducing the parking frequency of this harvester, and ensuring the working efficiency of this harvester. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic structural diagram of the connecting mechanism provided by the embodiment of the present application;

[0031] Figure 2 It is another schematic structural diagram of the connecting mechanism provided by the embodiment of the present application;

[0032] Figure 3 It is a schematic structural diagram of the first beam member of the connecting mechanism provided by the embodiment of the present application;

[0033] Figure 4 Schematic structural diagram of the limiting member of the connecting mechanism provided in the embodiment of the present application;

[0034] Figure 5 is Figure 4 Enlarged structural diagram at A.

[0035] Reference numerals:

[0036] 1 - Plate member, 101 - Installation part, 2 - Cleaning sieve, 3 - First beam member, 301 - First clamping part, 302 - First cavity, 303 - Second cavity, 304 - Entrance, 305 - First reinforcing diagonal rib, 306 - Perforation, 4 - Second beam member, 401 - Second clamping part, 402 - Third cavity, 403 - Passing channel, 404 - Second reinforcing diagonal rib, 5 - Limiting member, 501 - Limiting part, 6 - Connecting member, 601 - Rod part, 602 - End cap, 603 - Locking part, 604 - Limiting flange. Detailed implementation manners

[0037] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present application.

[0038] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0039] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] The following refers to Figures 1 to 5 Describe the connection mechanism and the harvester described in the embodiments of the present application.

[0043] See Figures 1 to 5 As shown, the embodiment of the present application provides a connection mechanism for the cleaning sieve 2. The connection mechanism includes a plate member 1, a first beam member 3, a second beam member 4, a connection member 6, and a limiting member 5. Among them, the cleaning sieve 2 is arranged on the plate member 1, and the first beam member 3 is arranged on the plate member 1. The frame of the cleaning sieve 2 has a quadrilateral structure. Define the four side edges as the first side edge, the second side edge, the third side edge, and the fourth side edge that are sequentially connected end to end. Among them, the first side edge and the third side edge are arranged in parallel at intervals, the second side edge and the fourth side edge are arranged in parallel at intervals, the first side edge is connected to one side surface of the plate member 1, and the connection method can be welding, using bolts or other forms of fastener connection methods. Of course, it is not limited to this. The first side edge and the second side edge are arranged at an angle, preferably, the first side edge and the second side edge are arranged perpendicular to each other. The second beam member 4 is arranged on the second side edge of the cleaning sieve 2, or the second beam member 4 serves as the second side edge of the cleaning sieve 2, and the second beam member 4 can be mutually attached to the first beam member 3, so as to facilitate using the connection member 6 to connect the first beam member 3 and the second beam member 4, and further connect and fix the cleaning sieve 2 and the plate member 1. The limiting member 5 is arranged on the first beam member 3, and the limiting member 5 is provided with a limiting portion 501. When assembling this connection mechanism, use the connection member 6 to sequentially pass through the first beam member 3, the limiting portion 501, and the second beam member 4 to connect the three, so as to complete the connection between the plate member 1 and the cleaning sieve 2. The limiting portion 501 can limit the connection member 6 to prevent the connection member 6 from loosening or even falling off due to factors such as vibration, affecting the connection stability of this connection mechanism and also affecting the normal operation of the vibrating screen.

[0044] It should be noted that the plate member 1 in this embodiment can support the cleaning sieve 2. It should be noted that the plate member 1 can be a conventional plate member 1, or it can be the driving plate of the cleaning sieve 2. The driving plate is connected to the driving mechanism, and after the driving mechanism is started, the cleaning sieve is driven to move by the driving plate.

[0045] In addition, the third side of the cleaning sieve 2 can be connected to the plate member 1 through another beam member, and the beam member and the plate member 1 can be connected by this connection mechanism, but are not limited to this. The fourth side of the cleaning sieve 2 can be connected to another plate member 1 (not shown in the figure).

[0046] In an embodiment of the present application, preferably, the first beam member 3 is provided with a first clamping portion 301, the second beam member 4 is provided with a second clamping portion 401, and the shape of the first clamping portion 301 is adapted to the shape of the second clamping portion 401.

[0047] In this embodiment, the first beam member 3 is integrally long and has a plurality of side walls. The radial cross-section of the first beam member 3 is polygonal. One of the side walls of the first beam member 3 is provided with a first clamping portion 301. The first clamping portion 301 protrudes relative to the wall surface of the first beam member 3. The first clamping portion 301 is also long and extends along the length direction of the first beam member 3.

[0048] The second beam member 4 is integrally long and has a plurality of side walls. The radial cross-section of the second beam member 4 is polygonal. The wall surface of the second beam member 4 for fitting with the first beam member 3 is provided with a second clamping portion 401. The second clamping portion 401 is recessed relative to the wall surface of the second beam member 4 to form an L-shaped notch. The length of the second clamping portion 401 extends along the length direction of the second beam member 4. The shape of the first clamping portion 301 is adapted to the shape of the second clamping portion 401, so that the first beam member 3 and the second beam member 4 can be abutted and limited to each other through the adapted first clamping portion 301 and second clamping portion 401, improving the stability of the position between the two and reducing the risk of loosening between the two.

[0049] In an embodiment of the present application, preferably, a first cavity 302 and a second cavity 303 that communicate with each other are formed inside the first beam member 3. The first cavity 302 communicates with the second cavity 303. The lengths of the first cavity 302 and the second cavity 303 both extend along the length direction of the first beam member 3. The second cavity 303 is provided with an inlet 304 for passing through the connecting member 6.

[0050] A third cavity 402 is formed inside the second beam member 4. The third cavity 402 is provided with a through-channel 403 for passing through the connecting member 6, and the through-channel 403 is provided with an outlet for the connecting member 6 to pass out.

[0051] In an embodiment of the present application, preferably, the number of the connecting members 6 is multiple, and the multiple connecting members 6 are arranged at intervals along the length direction of the first beam member 3 and the length direction of the second beam member 4.

[0052] The first clamping portion 301 is provided with a plurality of through holes 306, each through hole 306 communicates with the second cavity 303, and the second cavity 303 is connected to the passing channel 403 through the through hole 306;

[0053] The number of the through holes 306, the number of the passing channels 403, and the number of the limiting portions 501 are the same and not less than the number of the connecting members 6.

[0054] In this embodiment, a first reinforcing diagonal rib 305 is arranged inside the first beam member 3, so that a structure similar to a broken bridge is formed inside the first beam member 3, thereby improving the structural strength of the first beam member 3. The length of the first reinforcing diagonal rib 305 extends along the length direction of the first beam member 3, and the first reinforcing diagonal rib 305 divides the internal space of the first beam member 3 into a first cavity 302 and a second cavity 303. The second cavity 303 is provided with an entrance 304, and the first cavity 302 communicates with the second cavity 303 at the entrance 304. The connecting member 6 can pass through the entrance 304 and be inserted into the second cavity 303.

[0055] Through holes 306 are formed on the wall surface of the first clamping portion 301, and the through holes 306 communicate with the second cavity 303. After the connecting member 6 passes through the entrance 304 and enters the second cavity 303, it passes through the through hole 306 and extends towards the second clamping portion 401.

[0056] The inside of the second beam member 4 is hollow, and a second reinforcing diagonal rib 404 is arranged inside the second beam member 4. A passing channel 403 is formed inside the second beam member 4 by profiles. The second reinforcing diagonal rib 404 is connected to the outer wall surface of the passing channel 403 or has an integral structure. The passing channel 403 communicates with the second cavity 303 through the through hole 306. After passing through the through hole 306, the connecting member 6 can be inserted into the passing channel 403. An outlet is formed at one end of the passing channel 403 away from the first beam member 3. After the connecting member 6 is connected in place, one end is located inside the first cavity 302, and the other end of the connecting member 6 passes through the outlet and extends outside the second beam member 4.

[0057] It should be noted that in this embodiment, the number of the connecting members 6 is multiple, and the multiple connecting members 6 are arranged at intervals along the length directions of the first beam member 3 and the second beam member 4. That is to say, the first beam member 3 and the second beam member 4 are connected by the multiple connecting members 6. Correspondingly, the number of the entrances 304, the number of the through holes 306 on the first beam member 3, and the number of the passing channels 403 inside the second beam member 4 should match the number of the connecting members 6. Preferably, the number of the entrances 304, the number of the through holes 306, and the number of the passing channels 403 are the same as the number of the connecting members 6, and each group of the connected entrances 304, through holes 306, and passing channels 403 is correspondingly provided with a connecting member 6 passing through.

[0058] In one embodiment of the present application, preferably, the limiting member 5 is in the shape of a long flat plate, the length of the limiting member 5 extends along the length direction of the first beam member 3 , and the limiting member 5 is disposed in the second cavity 303 .

[0059] In one embodiment of the present application, preferably, the limiting portion 501 has a hole structure penetrating the limiting member 5 , and the shape of the limiting portion 501 is compatible with the shape of the end cap 602 .

[0060] In this embodiment, the limiting member 5 is in the shape of a long flat plate, the limiting member 5 is arranged in the second cavity 303, and the length of the limiting member 5 extends along the length direction of the first beam member 3, and a plurality of limiting portions 501 are arranged on the limiting member 5, and the plurality of limiting portions 501 are arranged at intervals along the length direction of the limiting member 5.

[0061] The limiting portion 501 is specifically a hole structure that passes through the two side plate surfaces of the limiting member 5. The number of the limiting portions 501 is the same as the number of the entrances 304 of the second cavity 303 and is arranged one-to-one. Each limiting portion 501 is arranged opposite to an entrance 304, so that the connecting member 6 can pass through the entrance 304 and the limiting portion 501 in sequence and pass through the second cavity 303.

[0062] In one embodiment of the present application, preferably, the connecting member 6 comprises:

[0063] The rod portion 601 is inserted into the first cavity 302, the second cavity 303, the stopper 501 and the insertion channel 403;

[0064] An end cap 602, which is disposed at one end of the rod 601, and has a polygonal side;

[0065] The locking member 603 is detachably disposed at the other end of the rod 601 .

[0066] In this embodiment, the connecting member 6 specifically includes a rod portion 601, an end cap 602, and a locking member 603. Among them, the rod portion 601 is specifically a threaded rod. The end cap 602 is provided at one end of the rod portion 601. Preferably, the end cap 602 and the rod portion 601 have an integral structure. The side of the end cap 602 is polygonal. Preferably, the side of the end cap 602 is specifically a regular hexagon, so that the end cap 602 is in the shape of a hexagonal prism as a whole. The diameter of the end cap 602 is greater than the diameter of the rod portion 601. The locking member 603 is specifically a locking nut, and the locking member 603 can be threadedly connected to the rod portion 601 through a matching thread. When connecting, the end of the rod portion 601 without the end cap 602 is sequentially passed through the inlet 304 of the second cavity 303, the limiting portion 501 of the limiting member 5, the through hole 306 of the first clamping portion 301, the through channel 403, and finally passes out through the outlet of the through channel 403. In the state where the end cap 602 is just located within the limiting portion 501, the locking member 603 is locked with the rod portion 601 from the outside of the second beam member 4, thereby completing the connection between the first beam member 3 and the second beam member 4. Due to the limiting effect of the limiting portion 501 on the end cap 602, during both the locking process of the locking member 603 and the subsequent working process of the cleaning sieve 2, the connecting member 6 can be effectively prevented from rotating, reducing the probability of loosening of the connecting member 6.

[0067] In an embodiment of the present application, preferably, a limiting flange 604 is provided at the junction position between the rod portion 601 and the end cap 602. The limiting flange 604 is arranged along the circumferential direction of the rod portion 601, and the diameter of the limiting flange 604 is greater than the diameter of the limiting portion 501.

[0068] In this embodiment, the limiting flange 604 and the rod portion 601, the end cap 602 have an integral structure. The limiting flange 604 is distributed along the circumferential direction of the rod portion 601, and the limiting flange 604 is located between the end cap 602 and the rod portion 601. Preferably, the outer edge of the limiting flange 604 is a circular edge, and the diameter of the limiting flange 604 is greater than the diameter of the end cap 602 and also greater than the diameter of the limiting portion 501. The limiting flange 604 is located on the side of the limiting member 5 facing the second cavity 303, so that the end cap 602 can be located within the limiting portion 501, and the limiting flange 604 can play a limiting role to prevent axial displacement of the rod portion 601 and the end cap 602, resulting in the end cap 602 being disengaged from the limiting portion 501.

[0069] In an embodiment of the present application, preferably, the plate member 1 is provided with an installation portion 101, and the first beam member 3 is arranged on the installation portion 101. The first beam member 3 is arranged at an angle with the plate member 1.

[0070] In this embodiment, the installation part 101 can specifically be a groove structure or a hole structure provided on the plate member 1. The shape of the installation part 101 is adapted to the shape of the first beam member 3, so that the first beam member 3 can be inserted into the installation part 101, and the first beam member 3, the second beam member 4, and the second side edge of the cleaning sieve 2 can extend in the same direction. The first beam member 3 is arranged at an angle with the plate surface of the plate member 1. Preferably, the first beam member 3 is perpendicular to the plate member 1.

[0071] It should be noted that the connecting member 6 can be arranged on the first beam member 3 by means of embedding, or a hole structure can be opened on the wall surface of the first beam member 3 facing the entrance 304 of the second cavity 303, so as to place the connecting member 6 in the first beam member 3.

[0072] In summary, the connecting mechanism provided by the present application optimizes the structures and connection methods of the first beam member 3 and the second beam member 4, and provides a connecting mechanism with relatively high stability, thereby improving the stability and connection strength of the connection structure between the cleaning sieve 2 and the harvester, and effectively reducing the probability that the connection structure of the cleaning sieve 2 becomes loose or even fails to connect, resulting in abnormalities during the operation of the cleaning sieve 2.

[0073] The embodiment of the present application also provides a harvester, including the connecting mechanism described in any of the above embodiments. Therefore, it has all the beneficial technical effects of this connecting mechanism and will not be elaborated here.

[0074] The harvester provided by the present application reduces the failure rate of the cleaning sieve 2 through the above-mentioned connecting mechanism, thereby improving the stability and continuity of the operation process of this harvester, reducing the parking frequency of this harvester, and ensuring the working efficiency of this harvester.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connecting mechanism for a cleaning screen, characterized in that: include: a plate member, wherein the cleaning screen is arranged on the plate member; a first beam member, the first beam member being disposed on the plate member; a second beam member, the second beam member being disposed on the cleaning screen; A limiting member, the limiting member is arranged on the first beam member, and the limiting member is provided with a limiting portion; A connecting member is provided, and the connecting member passes through the first beam member, the limiting member and the second beam member in sequence to connect the plate member and the cleaning screen.

2. The connection mechanism according to claim 1, characterized in that: The first beam component is provided with a first clamping portion, and the second beam component is provided with a second clamping portion, and the shape of the first clamping portion is adapted to the shape of the second clamping portion.

3. The connection mechanism according to claim 2, characterized in that: A first cavity and a second cavity are formed inside the first beam component, the first cavity is connected to the second cavity, the length of the first cavity and the length of the second cavity are both extended along the length direction of the first beam component; the second cavity is provided with an entrance for passing the connecting component; A third cavity is formed inside the second beam member. The third cavity is provided with a penetration channel for penetrating the connecting member. The penetration channel is provided with an outlet for allowing the connecting member to pass out.

4. The connection mechanism according to claim 3, characterized in that: There are a plurality of connecting members, and the plurality of connecting members are arranged at intervals along the length direction of the first beam member; The first clamping portion is provided with a plurality of through holes, each of the through holes is communicated with the second cavity, and the second cavity is communicated with the through-holes; The number of the through holes, the number of the penetration channels and the number of the limiting portions are the same and are not less than the number of the connecting components.

5. The connection mechanism according to claim 3, characterized in that: The connecting member comprises: A rod portion, the rod portion being inserted through the first cavity, the second cavity, the limiting portion and the insertion channel; An end cap, the end cap being arranged at one end of the rod portion, the end cap having a polygonal side; A locking piece is detachably arranged at the other end of the rod.

6. The connection mechanism according to claim 5, characterized in that: A limiting flange is arranged at the junction of the rod portion and the end cap. The limiting flange is arranged along the circumference of the rod portion. The diameter of the limiting flange is greater than the diameter of the limiting portion.

7. The connection mechanism according to claim 3, characterized in that: The limiting member is in the shape of a long flat plate, the length of the limiting member extends along the length direction of the first beam member, and the limiting member is arranged in the second cavity.

8. The connection mechanism according to claim 5, characterized in that: The limiting portion has a hole structure penetrating the limiting member, and the shape of the limiting portion is matched with the shape of the end cap.

9. The connection mechanism according to any one of claims 1 to 8, characterized in that: The plate member is provided with a mounting portion, the first beam member is provided at the mounting portion, and the first beam member is provided at an angle to the plate member.

10. A harvester, characterized in that: The invention comprises the connecting mechanism and the cleaning screen as described in any one of claims 1 to 9.

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